Blue ssuperindividual corundum and preparation method thereof

Abstract

The invention discloses a blue superindividual corundum and a preparation method thereof. The preparation method comprises the following steps of: carrying out mixing, smelting, temperature reduction solidification, blowing-in grinding, magnetic separation impurity removal, screening and secondary magnetic separation impurity removal on one ton of alumina powder, anatase titanium dioxide, titanium stone powder, aluminium fluoride and zirconium dioxide powder; and then carrying out magnetic separation by using a magnetic separator so as to obtain the blue superindividual corundum. Because iron ores are not used, the smelting process causes no smoke and odour, and the processing process of a product causes no hydrogen sulfide gas, therefore the whole production process causes no pollution to the environment; in addition, because a right amount of the zirconium dioxide is added, the zirconium dioxide and the alumina appear in a crystal combining way, therefore true specific weight and granularity are obviously increased, chemical property is more stable, strength achieves 33 N, density achieves 4.02 g / cm<3>, the content of Al2O3 contained in the blue superindividual corundum achieves more than 99.55 percent, and the content of various impurities is lower.

Description

Technical field [0001] The invention belongs to the technical field of production methods of single crystal corundum, and particularly relates to a blue super single crystal corundum and a preparation method thereof. Background technique [0002] The traditional production method of single crystal corundum is to use bauxite, pyrite and carbonaceous materials as raw materials, and send them to the electric arc furnace for smelting after mixing, and produce Al at high temperature. 2 O 3 After cooling the electric furnace, the single crystal of corundum precipitated from the molten liquid. However, the original production method has big problems. One is that a large amount of sulfur dioxide gas is decomposed into the air during the refining process, and a large amount of hydrogen sulfide gas is generated during the hydrolysis process. The hydrogen sulfide gas affects various metals ( The corrosion of copper, zinc) wires and all kinds of electrical appliances is alarming. All kinds o...

AI Technical Summary

Problems solved by technology

But there are big problems in the original production method, the one, can decompose in the refining process in the air, discharge a large amount of sulfur dioxide gas, produce a large amount of hydrogen sulfide gas in the process of hydrolysis, hydrogen sulfide gas is to all kinds of metals ( Copper, zinc) wires, and various types of electrical appliances have an astonishing degree of corrosion. All types of wires will become rust powder and break off within three months, which is harmful to human health, pollutes the atmosphere, and discharges a large amount of deep sediment into the water, polluting downstream water sources

2. After the single crystal corundum produced by the original production method is made into a grinding wheel, there are iron spots and shrinkage phenomena. The result of the shrinkage is that abnormal cracks and deformation appear on the grinding wheel, which seriously affects the working ability and effect of the grinding wheel. Before leaving the factory A large number of grinding wheels are required for cutting and shaping, which greatly increases its production cost; in addition, the original production method consumes a lot of energy, and the production of single crystal corundum requires 6000 degrees of electricity per ton