Garnet Maintenance

Maintenance: because it H&X brown fused alumina to the long-term wear garnet purification. Purification of the word in Latin and degaussing approximation, so it is called degaussing. "Accounted birthplace decision" records: the need to purify 1-3 once each month. Even the timing of garnet also need to purify. Scientific perspective, people dead H&X silicon carbide abrasive powder attached to the Demantoid fungal growth, long-term skin disease is not easy to get washed. Purification method is to use a standard defense salt wash because it has no effect on natural garnet, unlike sea salt coarse salt is corrosive.

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 Precautions

1. The drug should not be used continuously for more than seven days, the symptoms are not H&X buy silica, please consult your physician or pharmacist. 2 children dosage please consult your physician or pharmacist. 3 fracture patients should not take, this is due to the formation of insoluble aluminum phosphate complexes, resulting in decreased serum phosphate concentration and phosphorus from the bone removed. 4 The drugs can interfere with the absorption of phosphorus, long-term use can cause hypophosphatemia; hypophosphatemia eg malabsorption syndrome patients with caution. 5 The role of drugs have constipation, H&X pink fused aluminium oxide constipation and therefore should be used with caution. 6 An overdose or serious adverse reactions should seek medical care immediately. 7 allergic to the drugs were banned, allergic caution. 8 when the property changes prohibit the use of drugs. 9 Please place the drugs on the reach of children. 10 Children must be under adult supervision. 11 If you are using other drugs, please consult your physician or pharmacist before using this medicine.

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.

aluminum powder product attributes

Performance and advantages:
H&X silicon carbide abrasive sand, powder, brown aluminum oxide abrasive blasting sand: a moderate hardness, high toughness, strong anti-crushing capacity, high temperature anti-oxidation, anti-corrosion, low cost, applicability, and other characteristics.
H&X white fused alumina supplier:
Widely used in abrasives, refractories, sandblasting, grinding and polishing, carborundum wearable Floor, precision casting shell mold production.

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

Describe silicon carbide abrasive

Details: 1, the use of non-ferrous metal smelting industry in the application of silicon carbide with a high temperature, high H&X calcium granules, good thermal conductivity, impact resistance, high temperature for indirect heating materials, such as Kennedy Retort furnaces. Distillation oven tray, pot, copper melting furnace lining, zinc plates arc furnace, thermocouple protection tubes. 2, the application of the steel industry in terms of the use of corrosion-resistant silicon carbide. Thermal shock resistance to wear. Thermal conductivity and good for large furnace lining improves life. 3, metallurgical beneficiation industry H&X sandblasting abrasive of silicon carbide hardness only to diamond, with strong wear resistance, abrasion resistance is the ideal material for pipes, impellers, pump chamber, cyclone, ore bucket liner, its wear resistance is cast iron, rubber life 5-20 times, but also one of the ideal materials aviation runway flight.

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.

The main varieties of garnet

The main species
Purple teeth black deposits in a H&X Carborundum Abrasives of native , mainly produced in many magmatic or metamorphic rocks , the majority of gem garnet found in alluvial placer . Purple teeth black garnet group minerals , chemical composition is more complex silicate minerals ( island silicates ) , usually A3B2 [SiO4] 3 said . Where A represents Ca2 +, Mg2 +, Fe2 +, Mn2 + and other divalent cations , B represents Al3 +, Fe3 +, Cr3 + and other trivalent cations . Crystal morphology was rhombic dodecahedron , or both H&X garnet sand three octahedral poly shape. Granular or massive aggregates . Affected by the composition of the garnet color , showing a variety of colors , which include red red series ' Pink ' purple ' orange ; yellow line includes yellow ' orange ' dense yellow' brownish yellow ; green line includes green ' olive ' yellow and green . Crystal display glass glossy surface , sub- adamantine luster , fracture noticeable oil sheen . Transparent to translucent . Homogeneous body , does not have pleochroism , no birefringence . Garnet can be divided into two series , six main varieties : almandine series ( pyrope , almandine , spessartine ) and andradite series ( uvarovite , grossular , andradite ) .

Historical legends garnet

Garnet in the Bronze Age has become a very popular gemstone , garnet was the ancient Egyptians also to beautify their costumes. The first four centuries of ancient Greece has been decorated with garnet bracelet . In 1842 , France Aube Pouan find treasures (Treasure of Pouan) , we found a five- century garnet and Germanic warriors buried with the bones . Leicestershire , UK Gold Garnet Charm found a 5th century . In a 6th century Frankish graves , found a hair clip decorated with garnet pin (Hairpin). In the 16th century, garnet is thought to protect the heart against the effects of toxins and plagues . In the Renaissance to the Victorian era produced by the Bohemian pyrope garnet as the main source was , but in the late 19th century , decorated with garnet bracelet and brooch (brooches) particularly widespread .
garnet supplier is the allegation that the first high priest of ancient Israel (High priest) Aaron wearing one color chest pocket (Hoshen) twelve jewels, on behalf of the tribe of Judah (Tribe of Judah). In Greek mythology, Kazakhstan at the end of Sri Lanka when Persephone returned to her eating pomegranate seeds , so she must return to the underworld within a certain time . Therefore Garnet represents loyalty, true and faithful . Besides, garnet in the " Koran" lit up the fourth heaven argument. Maintenance : the need for short-term defense salt per flooding filtered raise one day . If you pray with defense declared wish to write on , on both INCREDIBLE bowl , the long-term use can occur on the roots look like a bowl of strange phenomenon .
European Bohemian Garnet Museum : a sleeping centuries garnet red , her owner is black dew Juliet , then , Wu Lu Juliet is wearing While every stone of love , and her Goethe dating lover , she then convinced : garnet to bring good luck and happiness for their eternal love .

The crystal structure of garnet

garnets is a generic formula X3Y2 (SiO4) 3, silicate minerals (Silicate_minerals).
Garnet necklace
Garnet necklace
X where normally bivalent (divalent) of positive ions (Ca, Mg, Fe) occupy , and Y is where is a trivalent cation (Al, Fe, Cr) occupies , with a regular octahedron or the [SiO4] provided tetrahedral framework. Garnet crystal dodecahedron habit (crystal habit) most commonly found, but there is also a common habit recipe three octahedral (trapezohedron) (note here the "recipe three octahedral " in the main mineral literature will be called kite -shaped three-dimensional geometry THH (Deltoidal icositetrahedron)). They crystallize in the isometric crystal system , there are three equal -length axis and perpendicular to each other . garnet suppliers and will not appear cleavage (Cleavage), so when they burst under pressure will produce significant irregular pieces , a powerful natural crystal energy can bring unlimited inspiration and vitality.
On the market so-called " green garnet Bi " and garnet nothing to do , in fact, prehnite . Prehnite not green garnet , two completely different concepts . The grapes on the market take the side of the stone and green garnet , is nothing more than for financial gain . Value Demantoid very expensive diamond bid , the market is extremely rare.

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 ,

Optical properties of aluminum powder

Aluminium hydroxide by a light color, high- gloss aluminum metal , its smooth surface that reflects visible light, 60% -90% ultraviolet and infrared light , with the object containing aluminum powder paint coating , the surface of silver white light , this is the aluminum light reflection characteristics.
" Color effect" characteristic of aluminum powder
Since aluminum has a metallic luster and a characteristic to be coated parallel to, a vector containing a transparent pigment , a change in the gloss and color shades with aluminum angle of incidence of the incident light and the viewing angle of the light and color change , such feature is called " two-tone effect ." Aluminum in the coating film are arranged at different levels , when the incident light is irradiated to the layers of aluminum flakes , because by passing through the film thickness of the different type of weakening of the light reflected brightness is obviously different . When the inner light into the white fused alumina suppliers -containing layer and a transparent pigment , the pigment particles become incident through the colored light , and then after reflected different levels of aluminum , light metal , and a hue change will occur , and the viewing angle of the incident light gradual angle from the vertical position to move through the different light color and the number of particles of different particle sizes of aluminum , the hue of light reflected light can occur and the metal endless changes . This feature aluminum has been widely used in the paint, as hammer paint or metallic paint .
Floating aluminum powder characteristics
Pigment with a large variety of aluminum and aluminum paste is floating type , which is characterized by scaly film floating on the surface .
5 Application
Applications
Because aluminum has a silver-white metallic luster, so called aluminum silver or silver , its chemical composition is indeed " aluminum" , not " silver ." Applications: powder coating , ink, plastic masterbatch , printing, paper imitation gold , imitation Gold, gold film , textiles, but the use of water-based paints and paint with a pH of oxidized black. Not recommended for applications requiring a combination of acid rain and the occasion .

The development of aluminum industry

Chinese brown fused alumina price industry since the 1950s started, has been 50 years of history . Subsonic air atomized aluminum powder atomization method are used , the pressure water atomizing method is started into the production sequence , both products of irregular shape , also being spherical. In terms of ball milling of aluminum and aluminum manufacturing pulp , dry process and wet process have manufacturers use . Products are leafing aluminum powder and aluminum paste , aluminum and non- leafing aluminum paste . Suitable for water-based paint water dispersible aluminum paste already available in the form of aluminum alloys such as zinc and aluminum pulp slurry also produced .
4 features
Aluminum silver metal relative mass of 26.98 , a relative density of 2.55 , melting point of aluminum of 99.5% purity was 685 degrees , the boiling point of 2065 degrees, melting endotherm 323kj / g, aluminum reductive easily oxidized in the oxidation process exothermic . When a sharp exothermic oxidation 15.5 kj per gram / ​​g, aluminum is malleable metal , easy processing. Aluminum oxide film on the surface of the transparent and has good chemical stability.
Pigment particles with white fused alumina powder means scaly , and the desirability of treating agent coated aluminum powder pigments do . Aluminum paste is a mixture of aluminum powder pigment and a solvent , and it uses substantially the same characteristics and aluminum , because it is simple to use , and the greater the amount of production . Compared with aluminum pigment and other pigments , but also has its characteristic performance in the following aspects :
A scaly hide characteristics
Scaly aluminum particles , the ratio of diameter to sheet thickness of about ( 40:1 ) - ( 100:1 ) , the aluminum powder dispersed in the carrier in parallel with the substrate having the characteristics of many of the aluminum interconnection , the size filling the particles together to form a continuous metal film covering the substrate , and an outer coating of the light reflected , which is unique to aluminum hiding . Aluminum hiding depends on the surface area of the large and small , which is thicker than the diameter . Aluminum was extended during the grinding process , increasing diameter to thickness ratio , hiding also will increase .
2 , aluminum shielding properties
Aluminum powder dispersed in the carrier floating movement occurs , the result is always that its movement is parallel to its metal carrier coating to form a continuous layer of aluminum , and this aluminum layer is arranged parallel to the carrier film multilayer . Pores are staggered between the layers of aluminum powder , the capillary cut microporous support membrane , the outside water can not reach the gas through the pores of the substrate , which is characterized by good physical aluminum shielding .

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 ."

Detailed aluminum powder

Aluminium hydroxide powder, commonly known as " silver " , i.e., the silver metallic pigments , a small amount of lubricant is added to pure aluminum foil , crushed by ramming Chance squamous powder , and then polishing is made . Aluminum is light, floating force, hiding power, light and heat reflective properties are good . After treatment, can also become a non -leafing aluminum . Aluminum can be used to identify fingerprints , you can also do the fireworks . Due to extensive use of aluminum , the demand for large , multi-species , it is a large class of metallic pigments .
1 Introduction
Chemical Formula : Al
Product Name : Aluminum
CAS NO :7429-90-5
MW: 26.9815
EC NO :231-072-3
InChI: InChI = 1/Al
Aluminum
Alumina Oxide
A physical and chemical properties and uses odorless. Silver-white metal powder , self-ignition temperature : 5900 ℃, dust explosion limit : 40g/m3. Used to make : paint, ink, paint and fireworks , also used as an additive porous concrete. Aluminum is also used as treatment and medical supplies , in addition to automotive and aircraft industries.
Two toxicity of the product is non-toxic to the respiratory tract induced pulmonary fibrosis. Maximum allowable concentration : 4mg/m3
Three short-term effects of exposure Inhalation : High concentrations of dust may irritate the respiratory mucosa . Eye contact: tiny dust particles generally no stimulation, a large dust particles will be some friction irritation. Oral: in the workplace without normal access to oral dose toxicity . Dust is a lot to swallow friction irritation of the stomach .
Four long- term effects of exposure or repeated exposure causes lung tissue fibrosis, occurring aluminum pneumoconiosis, symptoms include : cough , shortness of breath , loss of appetite, lethargy. Similar to asthma symptoms had appeared.
Five of the fire and explosion of combustible chemicals , powder and air can form explosive mixtures . Isolate the source of fire and let it burn . With sand, talc , sodium chloride to extinguish a small fire. Absolute ban on water.
Six chemical reactivity untouchable acid or alkali. A lot of dust will naturally generate heat when wet. Aluminum and other metal oxide mixture in a fire occurs violent reaction or fire. Mixed with halogen elements will fire. And halogenated hydrocarbons, heat or friction will react explosively .
Seven personal protective Inhalation : If dust concentration is unknown or exceed the exposure limit should wear dust masks Ⅰ level . Skin : To prevent excessive dust deposition or friction , the use of gloves, coveralls , work shoes . Eyes : Wear chemical safety glasses.