Sintering process for producing alumina

An alumina and process technology, which is applied in the field of sintering process for producing alumina, can solve the problems of increasing the structure and operation complexity of sintering equipment, increasing production costs, etc., so as to eliminate potential safety hazards, reduce dust content, and improve dust removal effect. Effect

Active Publication Date: 2012-07-04
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased the complexity of the structure and operation of the sintering equipment, leading to increased production costs

Method used

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  • Sintering process for producing alumina
  • Sintering process for producing alumina
  • Sintering process for producing alumina

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0030] First refer to the following figure 1 and figure 2 The composition of the sintering equipment 100 is described, and the sintering equipment 100 can be used to implement the sintering process for alumina production according to the embodiment of the present invention. However, it should be noted that the sintering process for alumina production according to the embodiment of the present invention is not limited to using figure 1 and figure 2 The sintering apparatus 100 shown is complete.

[0031] Such as figure 1 As shown, t...

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Abstract

The invention discloses a sintering process for producing alumina. The sintering process comprises the following steps of: adding a raw material to be sintered into a rotary kiln from the tail end of the rotary kiln; spraying fuel into the rotary kiln from the head of the rotary kiln so as to sinter the raw material; discharging the sintered clinker from the head of the rotary kiln; collecting the cooling tail gas generated by the discharged sintered clinker; dedusting the collected cooling tail gas; primarily cooling the sintered clinker by using the dedusted smoke; and secondarily cooling the primarily-cooled sintered clinker by using air with a temperature lower than that of the hot and clean tail gas. Due to the adoption of the sintering process, the alumina dissolution rate of the sintered clinker is improved, the cost is low and the circular economic benefits are high.

Description

technical field [0001] The invention relates to a sintering process, in particular to a sintering process for producing alumina. Background technique [0002] Alumina is the main raw material for electrolytic aluminum smelting. At present, the vast majority of alumina production uses bauxite as raw material. The production method is mainly Bayer method, and a few use sintering method, Bayer-sintering series method, etc. [0003] In the process of producing alumina by sintering method or Bayer-sintering tandem method, it is necessary to sinter raw meal or Bayer process red mud, which is traditionally sintered by sintering equipment with a rotary kiln, and then the fired clinker is sintered Dissolution. [0004] The temperature of the fired clinker discharged from the rotary kiln is very high, so it needs to be cooled before dissolution. Traditionally, the fired clinker is naturally cooled by a cooling machine. However, the dissolution rate of the calcined clinker that is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
Inventor 徐月和覃波徐华军刘建军曲修雁史更生
Owner CHINA ENFI ENGINEERING CORPORATION
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