Production method of grey white monocrystalline fused alumina

Abstract

The invention discloses a production method of grey white monocrystalline fused alumina. The method comprises the following steps of mixing the materials: mixing the raw materials in parts by weight: 100 parts of Al2O3 and 1 to 5 parts of TiO2; melting: feeding the mixed raw materials into an electric arc furnace to be molten; heating the materials to 2100 to 2400 DEG C until the raw materials in the electric arc furnace are sufficiently molten; discharging: after the sufficient melting, pouring the materials into a collecting ladle; performing heat insulation for 24 hours in room temperature environment; then, performing crushing, magnetic separation impurity removal, screening and secondary impurity removal; collecting the dust by a cloth bag dust remover so as to obtain clean grey white monocrystalline fused alumina. The method has the advantages that harmful gas is not generated; the environment protection is facilitated; the energy consumption is low; the prepared product has grey white color and luster; the color does not change in the grinding wheel preparation process; the pressure-resistant intensity is superior to that of the blue monocrystalline fused alumina; the method is suitable for the cutting of high-vanadium steel, titanium steel, stainless steel and various kinds of alloy.

Description

technical field [0001] The invention belongs to the technical field of single crystal corundum production methods, in particular to a production method of off-white single crystal corundum. Background technique [0002] Single crystal corundum abrasive is a variety of corundum series abrasives, and it is a material used for dry grinding and grinding of deformable and easy-to-burn workpieces. Various physical and chemical indicators of single crystal corundum: Chemical composition: Al2O3 99%--99.72% (GB10174-88 standard); Particle size composition: 24#--240# (GB2477-83 standard); Compressive strength: 30.7N Molding method: 69.25%--82.57%; toughness: 64.9% particle density: 3.96-3.99 g / cm 2 ; Magnetic objects: 94.6%. It is smelted in an electric arc furnace with bauxite, pyrite, anthracite and iron filings as raw materials. Abrasive particles have the characteristics of high hardness and toughness. They are very good heat-resistant high-grade abrasive materials. They are us...

AI Technical Summary

Problems solved by technology

However, when the temperature of the grinding wheel kiln exceeds 1280°C, the color of the grinding wheel will change, and the color of the grinding wheel will change irregularly, with no rules to follow, which will seriously affect the appearance of the prepared grinding wheel products and affect sales.

In the prior art, the coating technology is used to solve the problem of discoloration of the grinding wheel due to sintering, which not only increases the production cost, but also has an unnatural color, which is not easily accepted by users

There is no report on the preparation of off-white single crystal corundum in the prior art, so it is a new development direction in the field of abrasives to study a kind of off-white single crystal corundum that does not change color in the preparation of grinding wheels

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