Preparation process of high-purity corundum

A preparation process, corundum technology, which is applied in the field of high-purity corundum preparation process, can solve the problems of low efficiency, time-consuming and labor-intensive, etc., and achieve the effects of improving production efficiency, strong economic practicability, and realizing precision

Active Publication Date: 2017-10-13
山东泰尔福新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current mixing machine in the production of corundum is relatively simple and relatively inefficient. Firstly, various materials are put into the mixing machine in proportion, and then the mixed material is taken out from the mixing machine to enter the next production process after the mixing is completed, which is time-consuming. strenuous

Method used

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  • Preparation process of high-purity corundum
  • Preparation process of high-purity corundum
  • Preparation process of high-purity corundum

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Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] A preparation process for high-purity corundum, comprising the steps of:

[0053] (1) Add alumina monohydrate powder into the mixed solution of hydrochloric acid and water, the molar ratio of alumina monohydrate: hydrochloric acid: water is 1:10:60, and stir for 10 hours to obtain a suspension;

[0054] (2) Manganese oxide is added to the resulting suspension, the molar ratio of aluminum oxide monohydrate and manganese oxide in the suspension is 1:100, and a wet gel is obtained after stirring for 6-8 hours;

[0055] (3) The obtained wet gel is dried at 100-180°C for 12-24 hours to obtain a xerogel, which is pulverized to screen out 50-70 mesh particles;

[0056] (4) Mix the obtained xerogel particles and composite functional additives in a mixer, then put them into an electric arc furnace and gradually heat up at 600-800°C for...

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Abstract

The invention relates to a preparation process of high-purity corundum and belongs to the fields of a production process and a production device of corundum. The preparation process of the high-purity corundum is characterized by comprising the following steps: adding alumina monohydrate micropowder into a mixed solution of hydrochloric acid and water; adding manganese oxide into an obtained suspension liquid to obtain wet gel; drying the wet gel under the condition of 100 to 180 DEG C for 12 to 24 hours to obtain dry gel, crushing the dry gel and screening out granules of 50 to 70 meshes; mixing the obtained dry gel granules and a composite functional aid in a mixing machine, putting into an electric arc furnace, heating and calcining to obtain gamma-aluminum oxide; and calcining the obtained gamma-aluminum oxide in the electric arc furnace at 1500 to 1550 DEG C to obtain a high-purity corundum product. A high-purity high-quality corundum product is produced through reasonable process design; the mixing machine can accurately control a mixing link in production of the corundum to realize an uninterrupted weighing process; and waste gas generated by the electric arc furnace in production of the corundum is effectively treated, and environmental pollution generated by the waste gas is avoided.

Description

technical field [0001] The invention belongs to the field of corundum production technology and devices, and in particular relates to a preparation technology of high-purity corundum. Background technique [0002] Corundum is a kind of aluminum oxide (Al 2 o 3 ) crystallized gemstones. Pure corundum is colorless, but it shows different colors when it contains different trace elements. The Mohs hardness of corundum is 9, which is the second highest hardness substance found in nature so far, second only to diamond. As a kind of abrasive, corundum is widely used in abrasive abrasives. The higher the purity of corundum, the better its various performance indicators. How to rationally design the production process and improve the purity of corundum is a technical problem that needs to be solved urgently in the industry. [0003] The production of corundum involves multiple sets of equipment, among which the mixing before high temperature setting is particularly important. As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/46F27B3/08F27B3/28F27D17/00B01F13/10B01F15/04B01F15/02
CPCF27B3/085F27B3/28F27D17/003F27D17/008C01F7/46C01P2006/80B01F33/812B01F35/717B01F35/751B01F35/881Y02P10/25
Inventor 王泽铭韩露王忠
Owner 山东泰尔福新材料科技有限公司
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