Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of fused corundum material and its production method

A technology of fused corundum and a manufacturing method, which is applied in the field of refractory materials to achieve the effects of low production cost and reasonable process

Active Publication Date: 2016-10-05
锦州集信高温材料有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a smelting fused corundum material and its production method by using aluminum chromium slag and industrial aluminum ash electromelting reduction, which has low production cost and reasonable process, and solves the problem of solid waste of aluminum chromium slag and industrial aluminum ash. environmental friendly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of fused corundum material and its production method
  • A kind of fused corundum material and its production method
  • A kind of fused corundum material and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a. Raw materials and processing

[0035] Take Al 2 O 3 The content is 80wt%, Cr 2 O 3 The aluminum chromium slag lump with a content of 13wt% is crushed to a particle size ≤10mm; industrial aluminum ash (industrial metallurgical aluminum ash) with a particle size ≤1mm is taken, in which Al 2 O 3 The content is 53.6wt% and the Al content is 43.5wt%; the reducing agent petroleum coke is pulverized to a particle size ≤10mm;

[0036] b. Mix and homogenize

[0037] Take the raw materials prepared in step a, take 5000kg aluminum chromium slag, 25kg industrial aluminum ash and 300kg petroleum coke and mix them evenly, transport them to the drying kiln with a belt, and dry them into a dry mixture with a moisture content of ≤0.5%;

[0038] c. High temperature melting

[0039] Turn on the cooling water of the 3200KVA fixed electric arc furnace, send power to increase the temperature, add the dried dry mixture to the 3200KVA fixed electric arc furnace and embed the three-phase graphite elec...

Embodiment 2

[0045] a. Raw materials and processing

[0046] Take Al 2 O 3 The content is 82wt%, Cr 2 O 3 The aluminum chromium slag with a content of 12wt% is crushed to a particle size of ≤10mm; the industrial aluminum ash with a particle size of ≤1mm is taken, of which Al 2 O 3 The content is 50.3wt% and the Al content is 45wt%; the reducing agent petroleum coke is pulverized to a particle size ≤10mm;

[0047] b. Mix and homogenize

[0048] Take the raw materials prepared in step a, take 5000kg aluminum chromium slag, 50kg industrial aluminum ash and 250kg petroleum coke and mix them evenly, transport them to the drying kiln with a belt, and dry them into a dry mixture with a moisture content of ≤0.5% by mass;

[0049] c. High temperature melting

[0050] Turn on the cooling water in the 3200KVA fixed electric arc furnace, send power to increase the temperature, add the dried dry mixture to the 3200KVA fixed electric arc furnace and embed the three-phase graphite electrode of the electric arc fur...

Embodiment 3

[0056] a. Raw materials and processing

[0057] Take Al 2 O 3 The content is 80.5wt%, Cr 2 O 3 The aluminum chromium slag lump with a content of 13.5wt% is crushed to a particle size ≤10mm; the industrial aluminum ash with a particle size ≤1mm is taken, in which Al 2 O 3 The content is 51.3wt% and the Al content is 44.7wt%; the reducing agent petroleum coke is pulverized to a particle size ≤10mm;

[0058] b. Mix and homogenize

[0059] Take the raw materials prepared in step a, take 5000kg aluminum chromium slag, 100kg industrial aluminum ash and 200kg petroleum coke and mix them evenly, transport them to the drying kiln with a belt, and dry them into a dry mixture with a moisture mass percentage ≤0.5%;

[0060] c. High temperature melting

[0061] Turn on the cooling water in the 3200KVA fixed electric arc furnace, send power to increase the temperature, add the dried dry mixture to the 3200KVA fixed electric arc furnace and embed the three-phase graphite electrode of the electric arc ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a fused alumina material and a production method thereof. The fused alumina material mainly comprises the following components: 94.5%-98.7% of Al2O3 and 0.16%-2% of Cr2O3, wherein alpha-Al2O3 is more than or equal to 84%; the method comprises the following steps: uniformly mixing alumina-chrome slag with the particle size less than or equal to 10mm, industrial aluminum ash with the particle size less than or equal to 1mm, and petroleum coke with the particle size less than or equal to 10mm, drying, adding the mixture into an electric arc furnace, and smelting, wherein Cr2O3 and an impurity hexavalent chromium in the alumina-chrome slag are reduced into chrome, Na2O is reduced into metal Na to be evaporated, Al2O3 is smelted into alpha-Al2O3 corundum; thermally insulating to form a crystal form after smelting, crushing, sorting, and finishing to obtain a corundum block. The production method has the advantages as follows: the production cost is low as the alumina-chrome slag and the industrial aluminum ash are taken as raw materials, the process is reasonable, the problem of discharge of the alumina-chrome slag and solid waste aluminum ash in the industrial metallurgy is solved, environment friendliness is achieved, and the product meets the requirements of an excellent refractory matter.

Description

Technical field [0001] The invention belongs to the field of refractory materials, and particularly relates to an fused corundum material and a production method thereof. Background technique [0002] Corundum material has the characteristics of resistance to slag erosion, abrasion resistance and thermal shock stability. It is an excellent refractory material. It can not only be used in refractory products, but also in the fields of refractory bulk materials and abrasives. The main component Al in corundum 2 O 3 Content ≥94.5%, other substances such as Cr 2 O 3 ≤2%, TiO 2 The content is less than or equal to 3%. At present, the production of corundum material uses industrial alumina as the raw material. There are two production methods. One is the sintering method. The high temperature sintering at a temperature of ≥ 1200 ℃ for two hours can make the common industrial Al 2 O 3 Convert to α-Al 2 O 3 Cultivate into the corundum phase; the other is the electric melting method, the i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 高红军宋建义曹杨寇志远朱逾倩赵丽胡兵田刚高辉
Owner 锦州集信高温材料有限公司