CN104692427A

CN104692427A - Brown aluminum oxide smelting process

Info

Publication number: CN104692427A
Application number: CN201510069454.9A
Authority: CN
Inventors: 石铁栓; 石小磊; 赵钢强; 凌万党
Original assignee: Henan East Wind Xin Yan Material Science And Technology Ltd
Current assignee: Igawa Ryuizumi Dongfeng Abrasives Co., Ltd.
Priority date: 2015-02-11
Filing date: 2015-02-11
Publication date: 2015-06-10
Anticipated expiration: 2035-02-11
Also published as: CN104692427B

Abstract

The invention relates to a brown aluminum oxide smelting process. The process comprises the following steps: firstly adding brown aluminum oxide smelting dust removing powder into hot water; adding 0.05-0.3 part of concentrated sulfuric acid to perform water-washing acid-removal treatment; adding aluminum oxide powder; uniformly stirring to obtain a particle material; conveying the dehydrated particle material to a mixing bin; uniformly mixing the particle material with coke and scrap iron in the mixing bin; finally gradually adding the material layer by layer, reacting, smelting and refining in an electric arc smelting furnace; inspecting, cooling, classifying, crushing and sieving to obtain a brown aluminum oxide finished product. According to the process, the brown aluminum oxide smelting dust removing powder is taken as a raw material for producing smelted brown aluminum oxide, so that the production cost of the enterprise is effectively lowered, and the environmental protection problem of the brown aluminum oxide is correspondingly solved as well.

Description

A kind of Brown Alundum smelting technology

[technical field]

The present invention relates to Brown Alundum field of smelting, especially relate to a kind of with Brown Alundum smelt dust-removing powder for raw material is to smelt the Brown Alundum smelting technology of Brown Alundum.

[background technology]

Known, Brown Alundum is for main raw material with bauxitic clay, iron filings and coke, and the brown diamantine made through high melt in electric arc furnace, due to its there is good toughness, the feature such as fusing point is high, corrosion-resistant, linear expansivity is low and grinding performance is good, therefore often select Brown Alundum crushing and screening and material processed, then make and be suitable for processing the higher metal of grinding anti-tensile, as the grinding tool of various general steel, malleable iron, carbon steel and hard bronze etc., Brown Alundum can also for the manufacture of high-grade refractory materials simultaneously; On the other hand, Brown Alundum smelts dust-removing powder, namely the dust collection powder be commonly called as refers to the ultrafine dust material collected in Brown Alundum smelting process, this material is formed primarily of the mixing of bauxite powder, carbon dust, iron filings and clay powder, smelt finished product due to this material and Brown Alundum and differ comparatively large, therefore often by Brown Alundum processing enterprise as waste dump; But, the bauxite raw material of smelting due to Brown Alundum belongs to Nonrenewable resources, its purchase cost is very high, and the dust-removing powder of bulk deposition not only can affect environmental protection, also can cause the serious wasting of resources, and the corresponding production cost improving enterprise, therefore, how can be large by fine size, impurity, major ingredient is aluminium sesquioxide, silicon-dioxide, ferric oxide, titanium dioxide, calcium oxide and coke powder smelting dust-removing powder be applied to manufacture Brown Alundum just become Brown Alundum smelt in one of important subject.

[summary of the invention]

In order to overcome the deficiency in background technology, the invention discloses a kind of Brown Alundum smelting technology, described technique can utilize Brown Alundum to smelt dust-removing powder for raw material is to produce smelting Brown Alundum, and this not only effectively reduces the production cost of enterprise, but also solves corundum environmental issue accordingly.

For achieving the above object, the present invention adopts following technical scheme:

A kind of Brown Alundum smelting technology, described processing step is as follows:

A, by weight, smelts dust-removing powder by 1 part of Brown Alundum and joins in the hot water of 3-10 part 75-100 degree, then add the vitriol oil of 0.05-0.3 part, under rotating speed 200-400rpm speed, stir 60-180 minute, then leave standstill 8-12 hour;

B, discharged by the water of standing generation, then the water adding 20-40 part carries out the process of washing disacidify, makes the pH value of slip be 5.5-7, then adds the alundum of 0.1-20 part and stir, then makes the granule materials that diameter is 1-50mm through filter-press dehydration is shaping;

C, first utilize smelting furnace secondary waste heat to dry the granule materials made, recycling smelting furnace one-level waste heat carries out roasting to the granule materials after drying, and then delivers in blending bunker by the granule materials after thorough dehydration;

D, in blending bunker, add 0.01-0.05 part reductive agent coke grain and 0.02-0.08 part precipitation agent iron filings particle, after Homogeneous phase mixing, material is proceeded to feed bin;

Material is sent into electric smelting furnace by E, use feeding machine, carries out successively charging reaction and smelts and refining, and obtain Brown Alundum finished product by electric smelting furnace after inspection, cooling, classification, fragmentation and screening.

Owing to adopting technical scheme as above, the present invention has following beneficial effect:

Not only application cost is lower for Brown Alundum smelting technology of the present invention, is convenient to implementation and operation, and can ensure that smelting the working of a furnace stablizes, and quality product meets national sector standard; First dust-removing powder is smelted to Brown Alundum due to described technique and fall silicon deliming, and then low temperature smelting makes Brown Alundum, namely effectively make use of Brown Alundum and smelt dust-removing powder to produce smelting Brown Alundum, therefore, described technique not only efficiently solves the problem of dust-removing powder waste material waste and the environmental protection occurred in Brown Alundum crushing processing process, but also reach the production cost reducing manufacturing enterprise, for manufacturing enterprise adds the object of economic benefit by saving bauxitic clay resource.

[embodiment]

Can explain the present invention in more detail by the following examples, disclose object of the present invention and be intended to protect all changes and improvements in the scope of the invention, the present invention is not limited to the following examples:

Described Brown Alundum smelting technology step is as follows:

D, in blending bunker, add 0.01-0.05 part reductive agent coke grain and 0.02-0.08 part precipitation agent iron filings particle, and after Homogeneous phase mixing, material is proceeded to feed bin, wherein, the particle diameter of coke and iron filings is set to 1-10mm;

Material is sent into electric smelting furnace by E, use feeding machine, control that successively charging reaction is carried out to material smelt and refining by adjusting the smelting electric current and voltage of electric smelting furnace and electrode etc., and through inspection, cooling, classification, fragmentation with obtain Brown Alundum finished product after sieving.

During Brown Alundum smelting technology described in concrete enforcement:

Example 1:

A, by weight, smelts dust-removing powder by 1 part of Brown Alundum and joins in the container of the hot water depositing 3 parts 100 degree, then add the vitriol oil of 0.15 part, is uniform stirring 70 minutes under the speed of 400rpm at rotating speed, then standing 10 hours;

B, the water of standing generation to be discharged, the water adding 30 parts again carries out the process of washing disacidify, namely sulfuric acid residual in slip is removed, the pH value of slip is made to be 6.5, and then in container, add 0.1 part of alundum, and stir, then use pressure filter by shaping for the slurry dewatering granule materials made diameter and be 20mm;

C, first utilize the secondary waste heat of smelting furnace to dry the granule materials made, recycling smelting furnace one-level waste heat carries out roasting to the granule materials after drying, and then delivers in blending bunker by the granule materials after thorough dehydration;

D, in blending bunker, add precipitation agent 0.02 part of iron filings and reductive agent 0.01 part of coke, and fully mix;

Mixed material is sent in electric smelting furnace by E, use feeding machine, carries out successively charging reaction and smelts and refining, finally after inspection, cooling, classification, fragmentation and screening, namely obtain Brown Alundum finished product again by electric smelting furnace.

Example 2:

A, by weight, smelts dust-removing powder by 1 part of Brown Alundum and joins in the container of the hot water depositing 6 parts 90 degree, then add the vitriol oil of 0.2 part, is uniform stirring 80 minutes under the speed of 350rpm at rotating speed, then standing 10 hours;

B, the water of standing generation to be discharged, the water adding 35 parts again carries out the process of washing disacidify, namely sulfuric acid residual in slip is removed, the pH value of slip is made to be 6.2, and then in container, add 0.2 part of alundum, and stir, then use pressure filter to make shaping for slurry dewatering the granule materials that diameter is 2 0mm;

D, in blending bunker, add precipitation agent 0.025 part of iron filings and reductive agent 0.012 part of coke, and fully mix;

Part not in the detailed description of the invention is prior art, therefore the present invention is not described in detail.

Claims

1. a Brown Alundum smelting technology, is characterized in that: described processing step is as follows:

2. Brown Alundum smelting technology according to claim 1, is characterized in that: the granule materials diameter made in described step B is 20mm.

3. Brown Alundum smelting technology according to claim 1, is characterized in that: in described step D, the Zhi Jing Zhuo of coke grain and iron filings particle is set to 1-10mm.