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Clinker for producing alumina by series method and process thereof

A technology of alumina and tandem method, which is applied in the production of alumina clinker and its technology field by tandem method, which can solve the problems of clinker kiln firing belt ringing and clinker kiln operation difficulties, etc.

Active Publication Date: 2019-05-03
国家电投集团山西铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are some problems in the existing sintering method. For example, during the sintering process, it is easy to cause the clinker kiln to burn with rings, which brings difficulties to the operation of the clinker kiln.

Method used

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  • Clinker for producing alumina by series method and process thereof
  • Clinker for producing alumina by series method and process thereof
  • Clinker for producing alumina by series method and process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a clinker for producing alumina by a series method, which includes: alkali powder, Bayer process red mud, limestone and anthracite.

[0031] Among them, the alkali ratio of clinker is 1.04, and the calcium ratio is 1.08; wherein, the alkali ratio refers to the molar ratio of sodium oxide to aluminum oxide, and the calcium ratio refers to the molar ratio of calcium oxide to the sum of silicon oxide and iron oxide. And the iron content in the clinker is 16%.

Embodiment 2

[0033] This embodiment provides a kind of clinker for producing alumina by a series method, which is roughly the same as the clinker provided in Example 1, the difference is that the parameters are different, and the difference is as follows:

[0034] The alkali ratio of the clinker is 1.00, and the calcium ratio is 1.02; wherein, the alkali ratio refers to the molar ratio of sodium oxide to aluminum oxide, and the calcium ratio refers to the molar ratio of calcium oxide to the sum of silicon oxide and iron oxide. And the iron content in the clinker is 15%.

Embodiment 3

[0036] This embodiment provides a kind of clinker for producing alumina by a series method, which is roughly the same as the clinker provided in Examples 1-2, the difference lies in the different parameters, and the difference is as follows:

[0037] The alkali ratio of the clinker is 1.08, and the calcium ratio is 1.14; wherein, the alkali ratio refers to the molar ratio of sodium oxide to aluminum oxide, and the calcium ratio refers to the molar ratio of calcium oxide to the sum of silicon oxide and iron oxide. And the iron content in the clinker is 15%.

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Abstract

The invention discloses a clinker for producing alumina by a series method and a process thereof, relating to the sintering technical field, in particular, the alkali ratio of the clinker is 0.94-1.14, and the calcium ratio is 0.98-1.18, wherein the alkali ratio refers to the molar ratio of sodium oxide to aluminum oxide, and the calcium ratio refers to the molar ratio of calcium oxide to the sumof silicon oxide and iron oxide. The clinker can avoid or prevent the clinker kiln sintering zone ring formation caused by low aluminum content and high iron content in series sintering process. Through reasonable formula value adjustment in the clinker formula, iron oxide is allowed to react with calcium oxide to produce insoluble calcium ferrate, and the problem that iron makes red mud settlingworse is solved.

Description

technical field [0001] The invention relates to the technical field of sintering, in particular to a clinker used in series production of alumina and a process thereof. Background technique [0002] Sintering is one of the main methods of agglomerating iron ore fines that cannot be directly added to the blast furnace. Through sintering, the metallurgical properties of the raw material can also be improved. At present, the sintering method adopts the soda-lime sintering method, and the soda-lime sintering method uses bauxite (A / S 3 or so), sodium carbonate, and limestone for sintering. By adjusting different clinker formulas, the Al in bauxite 2 o 3 , Fe 2 o 3 , SiO 2 and TiO 2 , at an appropriate sintering temperature, correspondingly all generate Na 2 O·Al 2 o 3 、Na 2 O Fe 2 o 3 , 2CaO SiO 2 . Mole ratio [Na 2 O] / [Al 2 o 3 +Fe 2 o 3 ]=1.0 (i.e. alkali ratio); [CaO] / [SiO 2 ]=2.0 and [CaO] / [TiO 2 ]=1.0 (i.e. calcium ratio) is called the standard formula. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02C01G49/00
Inventor 卫璜赵光利柴洪云姚元元廖鹏董文清刘智明马志博范志强申强郑兴瑞史建生王晓强丁立功
Owner 国家电投集团山西铝业有限公司
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