garnet suppliers origin

China garnet sand origin especially Inner Mongolia, Jiangsu Lianyungang, Rizhao most H&X Alumina Refractory Mongolia garnet hardness, but mainly for the wind to wash the dust content is relatively large, the impact of cutting speed, the other, mostly small workshop production, deep Habitat inland transport costs are very high; Jiangsu Lianyungang garnet sand has been a major producer of domestic pomegranate sand, bright colors, hardness in general, open pit, mostly for local small workshop production, and therefore H&X Al2O3 powder low cost cheap, quality control is not strictly , often have a variety of impurities, often waterjet plug phenomenon, by the end of 2011, Lianyungang local government closed the mine, prohibit any person opened indiscriminate mining, which led to a very tight supply of garnet sand; Shandong Rizhao garnet sand for the deep mine, blackish dark red color, hardness, starting in 2011 in the domestic market, is less well known and therefore another origin, supply capacity, quality and stability, maritime land are more convenient, the next few years the main origin of Chinese garnet sand.

aluminum powder product

Is generally used H&X white fused alumina supplier, kaolin, clay or other material containing Al2O3 in an amount of carbon added, then heated to 1300 ~ 1500 ℃ in a nitrogen atmosphere, the product was obtained Si3N4. Which nitrogen used must ensure that no oxygen. Silica fume on the direct nitridation nitrogen, ammonia or hydrogen nitrogen gas mixture heated to 1200 ~ 1450 ℃ direct nitriding system. The reaction can be prepared with a high content of α original H&X Sic Refractory powder 1200 ~ 1300 ℃, high strength sintered ceramic. Reduction of silica to silicon dioxide, silicon nitride, nitrogen and carbon as the raw material preparation, the following reaction formula. The silica (or TEOS hydrolysis of silica) mixed with a certain proportion of carbon, nitrogen gas was heated to 1400 ℃ nitride 24h.

Natural corundum emery Profile

Emery (sic), also known as silicon carbide, silicon carbide is a colorless H&X brown fused aluminium oxide of pure colorless powder particles. Density of 3.06 to 3.20, Mohs hardness of about 9.5 degrees. Pure diamond abrasive powder can be done after grinding, polishing can be made of paper, can also be made of the friction surface of the grinding wheel and a whetstone.
Natural corundum also called garnet sand, silicate minerals. By hydraulic sorting, grinding material machining, classification and other methods of screening. Natural H&X buy silica into coarse mesh, mesh, breakdown into three categories, which coarse mesh black and red, the head is pale red, breakdown of red and white. Beijing Ming Jian environmental technology produces a variety of diamond mesh filter uniform particle size, particle shape evenly into the water chestnut crystals have sharp edges, grinding force.

The influence of organic acids on aluminum oxide adsorption of phosphorus

Aluminum oxide is widely distributed in tropical and subtropical regions acidic soil type of H&X brown fused aluminium oxide, its adsorption of phosphate radical fixed is acidic soil phosphorus deficiency and the main reasons for low phosphorus availability in [1 ~ 3]. On the phosphorus absorption mechanism of aluminium oxide, oxalic acid and phosphoric acid root in aluminum oxide on the surface of the competition effect, etc. There are some studies [4 ~ 10], but USES the aluminum oxide in alkaline conditions (pH 8 (2) more
abstract  : with different coordination anion (sulfuric acid, phosphoric acid, oxalic acid, citric acid root) composite aluminum oxide as an object, oxalic acid, citric acid, etc are studied by equilibrium adsorption concentration and pH of the influence of aluminum oxide H&X buy silica sand of phosphorus, and organic acids affect phosphorus adsorption mechanism. Results show that the largest of the six synthetic aluminium oxide phosphorus uptake (Xm) between 0 ~ 0 838 tendency for 189 g, with Al (OH) x has the highest phosphorus uptake, "aluminum citrate complexes (Al CA) lowest phosphorus uptake; Organic acid concentration increased, the phosphorus uptake of aluminum oxide is reduced, and the influence degree of the citric acid is higher than oxalic acid; And pH of 2 of oxalic acid and tartaric acid, Al (OH) x secondary adsorption quantity minimum for phosphorus, and organic acid pH 3, Al (OH) x to reach the highest, the secondary adsorption of phosphorus organic acid solution pH increased from 4 to 9, aluminium oxide changed or gradually reduce p uptake. Organic acids and phosphorus mixed join compared with single phosphorate, pH 3 when difference is small, the most significant difference when the pH 4 ~ 6, pH 7 ~ 8 and decreased; Organic acids lower aluminum oxide phosphorus uptake mechanism includes two aspects of acid dissolution and complex competition, when pH 2 is given priority to with the former, pH 3 ~ 9 is given priority to with the latter, and the adsorption on the surface of the aluminum oxide point of coordination anion is affinity

Classification of silicon carbide

Including black and green silicon carbide, silicon carbide, which: SiC is black quartz sand, H&X silicon carbide manufacturers coke and quality silica as the main raw materials, smelting electric arc furnace. Its hardness between corundum and diamond, corundum higher mechanical strength, brittle and sharp. Green silicon carbide based petroleum coke and quality silica as the main raw material, add salt as an additive, smelting electric arc furnace. Hardness between corundum and diamond, corundum higher mechanical strength. There are commonly two different silicon carbide abrasive H&X white fused alumina supplier, one is green silicon carbide, containing more than SiC 97%, the hard gold is mainly used for grinding tools. Another black silicon carbide, metallic luster, containing more than SiC 95%, the large intensity ratio of green silicon carbide, but lower hardness, primarily used for grinding cast iron and non-metallic materials.

The influence of organic acids on aluminum oxide adsorption of phosphorus

Aluminum oxide is widely distributed in tropical and subtropical regions acidic soil type of mineral, its adsorption of phosphate radical fixed is acidic soil phosphorus deficiency and the main reasons for low phosphorus availability in [1 ~ 3]. On the phosphorus absorption H&X calcium metal granules of aluminium oxide, oxalic acid and phosphoric acid root in aluminum oxide on the surface of the competition effect, etc. There are some studies [4 ~ 10], but USES the aluminum oxide in alkaline conditions (pH 8 (2) more
abstract  : with different coordination anion (sulfuric acid, phosphoric acid, oxalic acid, citric acid root) composite aluminum oxide as an object, oxalic acid, citric acid, etc are studied by equilibrium adsorption concentration and pH of the influence of aluminum oxide adsorption of phosphorus, and organic acids affect phosphorus adsorption mechanism. Results show that the largest of the six synthetic aluminium oxide phosphorus uptake (Xm) between H&X pink fused alumina 838 tendency for 189 g, with Al (OH) x has the highest phosphorus uptake, "aluminum citrate complexes (Al CA) lowest phosphorus uptake; Organic acid concentration increased, the phosphorus uptake of aluminum oxide is reduced, and the influence degree of the citric acid is higher than oxalic acid; And pH of 2 of oxalic acid and tartaric acid, Al (OH) x secondary adsorption quantity minimum for phosphorus, and organic acid pH 3, Al (OH) x to reach the highest, the secondary adsorption of phosphorus organic acid solution pH increased from 4 to 9, aluminium oxide changed or gradually reduce p uptake. Organic acids and phosphorus mixed join compared with single phosphorate, pH 3 when difference is small, the most significant difference when the pH 4 ~ 6, pH 7 ~ 8 and decreased; Organic acids lower aluminum oxide phosphorus uptake mechanism includes two aspects of acid dissolution and complex competition, when pH 2 is given priority to with the former, pH 3 ~ 9 is given priority to with the latter, and the adsorption on the surface of the aluminum oxide point of coordination anion is affinity

Garnet multiple places of origin

China garnet sand origin especially Inner H&X Alumina Oxide, Jiangsu Lianyungang, Rizhao most representative. Inner garnet sand hardness, but mainly for the wind to wash the dust content is relatively large, the impact of cutting speed. In addition, mostly small workshop production, secluded inland transport costs are very high; Jiangsu Lianyungang garnet sand has been a major producer of domestic pomegranate sand, bright colors, hardness in general, open pit, mostly for local small workshop production, so the cost low-cost low cheap, quality control is not strict, often have a variety of impurities, often waterjet plug phenomenon. End, Lianyungang H&X china garnet government closed the mine, prohibit any person opened indiscriminate mining, which led to a very tight supply of garnet sand; Shandong Rizhao Garnet sand is deep mine, blackish dark red color, hardness, from the beginning the domestic market, is less well known and therefore another origin, supply capacity, quality and stability, maritime land are more convenient, the next few years China is a major producer of garnet sand.

Comparison of aluminum and silver

which can be adjusted to reduce the amount of silver to the background and modulated gray , silver and blue phase effects of different hues , adding a very small amount , convection flat with good role in promoting. Applied to the film material in the mill together , can not be directly applied , will produce satellites plus direct silicon carbide manufacturers , such as white spots , R01 best, direct dry mix without particles .
2, the sheet structure leafing aluminum extrusion in the grinding process will be damaged ( deformed or crushed ) , resulting in the color gray, it is generally a dry mix method .
Non- floating silver
Uniformly distributed parallel to the non- silver coating in the float , and thus the resin package, and therefore have good oxidation resistance and wear resistance , good weather resistance acid , no fingerprints , glossy surface , and colors can be adjusted from the bottom powder, but adding a large amount of silver compared to floating , floating silver metallic effect without strong whiter . 2, PCR \ DIS aluminum powder especially suitable for outdoor products , because there are inorganic coating layer , with good water resistance, weather resistance, chemical resistance ; though coated with silicon and other materials, but in the natural environment of exposure to Alumina Abrasive powder in the light and humidity conditions will soon change chemical Physics oxidation , thus weakening the metal sense , the film is dark gray , gray leaf spot , etc. appear . In order to solve such problems and abrasions and other problems, we recommend using transparent powder varnish . 3 , cover the bottom with a transparent bottom powder dosage test , the addition of silver flash can reach up to about 10% ; mixed with spraying process directly affects the spray and cover the results, please note the consistency of mixing and spraying , the more coarse particle flashes better. 4, due to the differences in the shape of silver particles , the density and the amount of charge with respect the powder will cause separation and impact of the powder. Using bonding techniques for bonding the powder and silver powder , the powder and the effect of greatly improved. 5 , aluminum can not change color temperature of 600 degrees .

The introduction of various aluminum products

Silver Aluminium hydroxide powder
Floating silver superfine large surface area , when it is exposed to air , its surface can be rapidly generated in a passive protective film , i.e., black oxide , sealing measures to be good , floating silver case not recommended for applications requiring alkali- 2 large , silver between batches have some differences , and by the process , spraying effects , in addition to need to try to maintain the stability of the production process , but should first test of reproduction , so ; , if required may be considered white pearl powder expand loss. 3 , ultra-fine silver amount 1-2% of the bottom cover , with the addition of a high wax AW500B 0.6% -1.5 % and the bottom of the cover can produce a strong metallic luster , the more the addition amount of silver white, the smaller the amount of blue , there is insufficient amount of black spots black silk added , or commonly known as the fly feces , overall blackish . 4 , floating silver flaky , always floating in the outermost layer of the coating , so the hardness and antioxidant properties blackened somewhat less , plus Indian consumer to get better hardness required to increase the hardening agent AS501, plus additional silver hard agent POL16, POL09 , etc., can not be heightening wax , gold and silver aluminum powder arrangement agent, polyethylene wax , mixing the longer the better.
Floating silver
1 , silver metallic , the stronger the smaller the particle size , hiding the stronger ; addition of too easy to produce powder and spit tip clogging phenomenon ; easy enough when you add the amount of black spots , flooding or fine stripes. R18, R01 and other effects of new silver dispersant is used as carrier SIO2 efficient dispersant, unlike ordinary silver dispersants , regardless of how much can be uniformly dispersed silver added no black spots ,

Brief aluminum powder

Eight Aid Inhalation : If irritation occurs , so that the eyelids open, with normal saline or slow flush eyes with lukewarm water for at least 10 minutes. Skin contact : In case of irritation, excess pink fused alumina erase or wipe gently . Oral : Do not induce vomiting. Approximately 250 ml of water to the patient . All patients should ask a doctor for treatment.
Nine storage and transport rules storage and transport of flammable substances. Store in a cool, dry, well- ventilated place, avoid dust generation . Package No. 2,6 .
Ten safety and handling only trained personnel to undertake cleaning work. Guarantee to provide good ventilation . Use good protective clothing and respirators . Do not touch the fallout can shovel into clean, dry , and cover the container with the label , rinse the scene. Scattered away from combustible materials , compliance with environmental regulations.
2 Uses
Aluminum pigment particles using a scaly , it is precisely because of this state of scaly particles , it has a metallic luster and aluminum shielding . Industrial production of aluminum metal , long time ago there early production is pounding punch method, the buy brown fused alumina debris on the pound punching machine grooves , rods driven continuously under mechanical punch fight groove aluminum scrap , with ductility of aluminum foil under the impact of becoming and broken, after the aluminum becomes very meager fine filter , remove the aluminum as a desirable product . Productivity pound punch method is very low, the product quality is not easy to master, but a lot of dust in the production process , very easy to fire and explosion . In 1894 , the German Hamtag mill production with aluminum powder, placed in a ball mill , aluminum scrap and lubricants , the use of fly balls move after becoming crushed aluminum scrap aluminum flake in the mill and pipe filled with inert gas , this method is still in use , is called " dry production ." In 1910, the United States J.Hall invented adding petroleum solvent instead of inert gas in the mill , the production of aluminum powder and solvent slurried become pasty aluminum pigment. This method is simple , process safety , the product is easy to use , quickly adopted by countries in the world . The vast majority of modern aluminum pigments are using this method, which is also known as "wet ."

Garnet sand processing technology and uses

Waterjet sand processing
Reference Product Name : 60 mesh - 90 mesh garnet sand ( natural emery ) aka ( waterjet sand, water jet sand )
Processing: Featured content 85.4% garnet rock , artificial drying the moisture content of less than 4.7% , after the mechanical grinding pickling ( removal of impurities ) washing ( to remove sediment dust ) , the second artificial drying ( easy points sieve dust ) , moisture content below 5% . Finally, advanced secondary sieving process ( the particles more uniform ) screening package.
Recommended : 60 mesh silica sand supplier for cutting stainless steel , copper , marble products. 80 mesh sand for cutting glass , ceramics.
Garnet sand main purposes are:
( 1 ) steel hull , bridges and other sand-blasting ;
( 2 ) metal, stone, glass and other water jet cutting ;
( 3 ) chemical, petroleum, pharmaceutical , water treatment filter Alumina Grinding Media ;
( 4 ) polishing marble , optical lenses, glassware , leather and other materials ;
( 5 ) wheel, Whetstone , emery cloth , sandpaper raw materials ;
( 6 ) motorways , runways , wear rubber , non-slip paint and other wear-resistant materials ;
( 7 ) is widely used in the construction industry in the field of high-grade lacquer interior wall decoration elegant temperament . Ideal new non-metallic wear-resistant flooring aggregate.

Details about the garnet abrasive

Garnet is a island structure of calcium silicate, aluminum on mineralogy divided into two categories: department of aluminum oxide and black silicon carbide oxide. The chemical composition of garnet change is bigger, general chemical formula for the A3B2 [SiO4] 3, which represents A divalent calcium, magnesium, iron, manganese and other cations, B on behalf of trivalent aluminium, iron, chrome, manganese and other cations. Garnet generally is the crystallization of the sizes of particles, with moderate hardness, high melting point, good chemical stability, color according to different products and structure, present a different color, a dark red, red, pink, black, brown, etc. Garnet with moderate hardness, good toughness, particle size uniform, it is a good natural abrasive. In the optical industry, electronic industry, machinery industry etc widely used. Such as:
(1) in the high pressure water jet equipment (water knife cutting abrasive;
(2) the sandblasting derusting, cutting, special welding and thermal spraying, manufacturing grinding wheel, oilstone, emery cloth and garnet sand paper raw materials;
(3) used as water treatment filter medium;
(4) of silicon wafer, optical lenses, precision instruments and meters, polishing glass shell, glass, ceramic, stone, leather, plastic, metal parts can improve finish;
(5) can be used as building highway pavement, airport runway, wear-resisting rubber, industrial floor. Antiskid considerations of wear-resistant materials such as paint;
(6) for chemical, petroleum, pharmaceutical, water treatment filter medium and drilling mud weighting agent;
(7) can be used for washing factory jeans with sand sand workshop, etc

Green silicon carbide range of applications and key raw materials smelting

Green silicon carbide range of applications is gradually changing, and it is constantly rising trend in walking , silicon carbide main types of black and green , in today's high-tech refractory materials , silicon carbide is the most widely used products . Can be called emery or refractory sand .
Where: Green silicon carbide is petroleum coke and quality silica as the main raw material, add salt as an additive in electric arc furnace smelting . Green , high hardness and cutting ability, chemical stability , good thermal conductivity . High purity , brittle , microhardness 3280-3400 kg / mm2. It is made of abrasive, suitable for processing high hardness, brittleness of the material , its hardness between corundum and diamond , the mechanical strength is higher than corundum . Mainly used for grinding hard gold-bearing instruments . Green silicon carbide containing SiC99% or more, good self-sharpening , mostly used for machining tungsten carbide, titanium and optical glass , also used for grinding cylinder liners and grinding high-speed steel cutting tools.
Green Silicon Carbide Applications:
Do bonded and coated abrasives , and polishing and so on. Suitable for machining cast iron , tungsten carbide , titanium , high-speed steel. Can grind glass, ceramics, stone , agate and jade and other non-metallic materials, fine jewelry , heating elements and thermal elements . Such as carbide , optical glass, glass and ceramics brittle ma non-metallic materials , can also be used to manufacture high-grade refractory , electric components and electrical component products. There is also cubic silicon carbide, which is based on a special process to take the yellow-green crystals, suitable for the production of abrasive bearing super finishing , make the surface roughness Ra32 ~ 0.16 microns from primary processing to Ra0.04 ~ 0.02 microns.
The physical properties of green silicon carbide is better, in the major industries in the area has a significant role , is very important .

Green silicon carbide powder raw material selection

Green SiC is a high-tech refractory , has been in use in various industries , more and more , and it has many excellent performance in a high-performance products , silicon carbide, green silicon carbide and black can be divided into carbonization silicon , here to introduce you to a green silicon carbide powder of raw material selection , I hope for your help .
Green silicon carbide is quartz sand and coke for raw materials as a good thermal conductivity , high hardness of man-made materials . Silicon carbide powder is widely used in refractory, wear-resistant flooring , ceramic foam , specialty coatings, corrosion-resistant paint, flow separation and environmental protection industries , green silicon carbide even at high temperatures also have high strength , elastic modulus at the temperature reaches its 1600 ℃ , began attenuation. At a temperature of 2815 ° C begin to separate , but it does not melt at atmospheric pressure . Green silicon carbide grain of sand can quartz sand and coke as raw materials, manufacture green silicon carbide powder with a grain of sand , and you can choose as raw materials of sand . Green silicon carbide powder raw materials first look at the color , the second depends on the hardness , the third depends on the content .

Green silicon carbide on the performance and introduces the main purposes

Presumably there are many people in the choice of green silicon carbide does not know when its purpose and performance is what? Hope to explain below, we will further green silicon carbide silica fume for mastery.
At least 70 kinds of green silicon carbide crystal patterns. α-SiC is the most common form of allomorphic matter, in temperatures above 2000 ° C to form, with a hexagonal crystal structure (like wurtzite). β-silicon carbide, cubic crystal structure, and diamonds are similar, below 2000 ° C generated. Although the heterogeneous catalyst carrier body applications, because of its higher than α type of unit surface area and compelling, but until now, there has not been this type of commercial applications.
And a high proportion of its 3.2 sublimation temperature (about 2700 ° C), silicon carbide is suitable as raw materials for high-temperature furnace bearing or objects. Can be achieved at any pressure, it will not melt, and has a relatively low chemical activity. Because of its high thermal conductivity, high breakdown electric field strength and high maximum current density, the recent high-power semiconductor devices in applications, many people try to use it to replace silicon.
Pure silicon carbide abrasive is a colorless, while the industrial production of brown to black iron is due to the impurities. Crystal rainbow sheen is generated on the surface of the silicon dioxide because of its protective layer due.
Green silicon carbide for compound semiconductor materials, lightning, circuit elements, high-temperature applications, UV detectors, structural materials, astronomy, disc brakes, clutch, diesel particulate filter, filament pyrometer, ceramic films, cutting tools , heating elements, nuclear fuel, jewelery, steel, protective gear, catalyst carrier body and other fields.
Through the above and on the performance of green silicon carbide main purpose of introduction, I hope to bring you help.

Recent developments in green silicon carbide

Green silicon carbide as an abrasive, silicon carbide production area in our previous two or three decades was a hero, and later as for export purposes and silicon carbide grinding non-development, production volume relative to the black silicon carbide, gradually relegated secondary position.
But its total production is always rising steadily, especially in the late 1990s, the international wire cutting of green silicon carbide powder application process, our green silicon carbide production and exports have increased, but producing regions and manufacturers also limited to the traditional Northeast Mudanjiang, Hun, etc., the Central Plains, Zhengzhou, Pingdingshan, Shandong Tengzhou, linshu and Hubei Danjiangkou, etc., the Northwest Territories and only Qinghai Guide Haiyan and Blackforge change Green furnace of LAI.
Another turn of the century before, not on the use of Sichuan power grid small hydro electricity low (from the 0.08 to 0.15 yuan / KWH), from Shandong, and Fujian in Lianyungang Miannig, ganluo and Johnson and Yaan, etc., to build a batch furnace capacity 6300KVA ~ 2000KVA green silicon carbide smelter home.
So far, China's annual output of green silicon carbide by the reform and opening up to the time of less than three tonnes to seven or eight tons. But the biggest single furnace capacity still hovering at 5000 ~ 6300KVA, smelting process also follows the formation of the sixties and the East China Sea petroleum coke calcination quartz sand as raw material processes.

Type of alumina production process outlined

Alumina is a different production methods is extracted from bauxite a white powder. Alumina is typical of large and complex industrial processes of the world more than 90% of alumina is used in direct economic Bayer production process, and our aluminum business due to mineral is different, they each use different production processes.
Sintering method: suitable for high ore grade silicon, insoluble, a middle-grade resources diaspore, long process, complex process. Most of the old aluminum companies to use more of this approach alumina smelting. Shandong Aluminum Plant, Zhongzhou Aluminum stage Ⅰ, Shanxi Aluminum Plant Phase Ⅰ
Alumina sintering production process including clinker, clinker dissolution, semen preparation, decomposition and evaporation and other major production processes.
From raw material grinding raw slurry through the rotary kiln firing into easily dissolved sodium aluminate clinker, and then the carbon of liquor and one lotion after soaking the dissolution; thereafter through the separation of red mud washing off the crude liquid silicon, silicon slag separation processes generated semen was sent to carbon points and kinds of processes for the decomposition reaction, precipitated aluminum hydroxide; kinds of species formed by evaporation of the mother liquor distilled liquor after mixing lye Bayer sent to the original pulp ingredients; carbon distilled liquor then return to the raw mill ingredients. The precipitated aluminum hydroxide is calcined to send firing step.
Compared with Bayer, sintering clinker and carbon mainly in the control section of decomposition of the two processes are completely different
Bayer: Bayer is Karl Joseph Bayer invented in 1887, he discovered that adding a fine kind of sodium aluminate solution can be decomposed AL (OH) 3, after evaporation of the mother liquor can be decomposed at high temperature and pressure leaching bauxite The AL (OH) 3. This finding was later confirmed in experiments and applied to industrial practice, is the most widely used foreign alumina production process. Suitable for producing soluble gibbsite and boehmite a deal with medium grade bauxite alkali consumption is high, consumption of large mine is a conventional Bayer process alumina production shortcomings. Guizhou Aluminum stage Ⅰ, Pingguo Aluminum
Bayer alumina production process includes pre-desilication, the dissolution process, red mud washing, filtration process, kind of decomposition process and aluminum hydroxide filtration, roasting and other major production processes.
Bayer processing: can be A / S of 4 or more of bauxite by flotation into A / S of 11.2 slurry, single-tube can improve the dissolution rate of dissolution systems, process piping and the tank is not easy to stutter. Zhongzhou Aluminum Phase Ⅱ
Tandem method: Processing bauxite low crystalline bits Suitable methods. Bayer first with relatively simple treatment of ore to maximize the extraction of ore alumina sintering method and then use Bayer red mud recycling Al2O3 and Na2O, can reduce the overall energy consumption of the production of alumina, Al2O3 total high recovery, alkali consumption reduced product costs can be significantly reduced. Without increasing construction investment and equipment in existing plant hybrid method application. Guizhou Aluminum Plant, Luneng Jinbei (Planning)
Parallel method: by Bayer France, composed of parallel alumina sintering production process. Zhongzhou Aluminum, aluminum mooring former Soviet Dnepr
Hybrid method: by Bayer France, sintering, whose production process is characterized by: complex process, strong continuity, parameter detection difficulties associated with strong production management is difficult, in the chemical and metallurgical industry has a strong representation for process automation demanding. Is a complex metallurgical and chemical processes, with wet and dry metallurgical common characteristics, particularly suitable for processing in a country dominated diaspore bauxite, it has a high crystallinity, insoluble ore characteristics, required at high temperature (250 ℃ above), pressure (5.5MPa), high concentration of alkali (NaOH 20% or more) under the conditions of dissolution; need for lower grade ore sintering a more complex process; Ore high silicon, in the production process and the surface of the device easy to scale, but also seriously affect the collection of monitoring data. Shanxi Aluminum Plant Phase Ⅰ, Ⅱ, Guizhou Aluminum Plant, Zhengzhou Aluminum
A domestic manufacturer of hybrid alumina alumina production line process flow diagram, covering domestic and international law and the typical Bayer typical sintered alumina production process. Chart has three material exchanges: the Bayer process red mud and accompanying fluid delivery sintering system ingredients; Bayer seeds liquor evaporation precipitated crystal base and attach the liquid delivery sintering system prepared raw slurry; sintering kinds of liquor by evaporation Bayer evacuation systems do fill base used. Bayer and sintering two systems are interrelated, mutual restraint, mutual influence between processes, production organization difficult.
Lime Bayer: Bayer process compared with conventional, in addition to appropriate to increase the separation of lime burning and red mud washing process production capacity outside the other identical. By adding an excess of lime dissolution process, in addition to meeting with TiO2 addition amount of lime required for the reaction, the need to partially meet with bauxite as much as possible in the SiO2 CaO reacts with hydrated alumina calcium, so that the dissolution process in part by the removal of silicon product type sodalite becomes hydrated aluminum silicate hydrate hydrated alumina garnet-type calcium, thus greatly reducing the red mud of the N / S. Compared with the hybrid method processes, eliminating heat consumption of clinker sintering process and its corresponding wet production systems, less investment, low energy consumption, but consumption is relatively large bauxite and limestone.