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.