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