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A kind of clinker and its process for producing alumina by serial method

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 operation difficulties, clinker kiln firing belt ringing, etc.

Active Publication Date: 2021-10-26
国家电投集团山西铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of clinker and its process for producing alumina by serial method
  • A kind of clinker and its process for producing alumina by serial method

Examples

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Embodiment 1

[0030] This embodiment provides a clinker of alumina producing alumina in series, including: alkali powder, Bayer method, limestone, and anthracite.

[0031] Among them, the alkali ratio of the clinker is 1.04, the calcium is 1.08; wherein the alkaline ratio is the molar ratio of sodium oxide and alumina, the calcium ratio is a molar ratio of calcium oxide and silicon oxide, iron oxide. And the iron content of the clinker is 16%.

Embodiment 2

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

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

Embodiment 3

[0036] This embodiment provides a clinker of aluminum oxide in series, which is substantially the same as the clinker provided in Examples 1 to 2, and the difference is that the parameters are different, the difference is as follows:

[0037] The alkali ratio of the clinker is 1.08, the calcium is 1.14; wherein the alkaline ratio is the molar ratio of sodium oxide and alumina, the calcium ratio is a molar ratio of calcium oxide and silicon oxide, 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, and relates to the technical field of sintering. Specifically, the clinker has an alkali ratio of 0.94-1.14 and a calcium ratio of 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 sum of silicon oxide and iron oxide. The clinker can avoid or prevent the clinker kiln firing rings that may be caused by the low aluminum content and high iron content in the tandem sintering method. In the clinker formula, the iron oxide and calcium oxide can be adjusted through reasonable formula value adjustment. Matching reaction, producing insoluble calcium ferrite, solving the problem that iron makes the red mud sedimentation worse.

Description

Technical field [0001] The present invention relates to the field of sintering techniques, and in particular, there is a clinker and processes for producing alumina to produce alumina in series. Background technique [0002] Sintering is one of the main methods of iron ore powder that cannot be added directly to the blast furnace. By sintering, it is also possible to improve the metallurgical properties of raw materials. At present, the sintering method uses an alkali lime sintering method, and the alkali lime sintering method is made of aluminum mine muse (A / S 3), sulfate, limestone to sinter, by adjusting the different clinker formula, so that Aluminum mine 2 O 3 , Fe 2 O 3 SiO 2 TiO 2 , In a suitable sintering temperature, the corresponding generation of NA 2 O · Al 2 O 3 NA 2 O · FE 2 O 3 2Cao · Sio 2 . Material 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 (ie, calcium ratio) ingredient ratio is called...

Claims

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Application Information

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Patent Type & Authority Patents(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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