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A method for continuous operation of decomposition and staged production in an alumina plant

An alumina plant, aluminum hydroxide technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of reduced decomposition time, increased material throughput of the decomposition tank, and increased operating costs, so as to prolong the decomposition time and ensure stability. , the effect of reducing the solid content

Active Publication Date: 2021-07-13
GUANGXI HUAYIN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The large circulation pump in the decomposition system of the shutdown maintenance must be turned on every time the inspection is stopped, which increases operating costs;
[0004] 2. The decomposition tank corresponding to each stop inspection is cycled by itself, which is equivalent to destroying the decomposition system once every time the inspection stop is stopped, which is not conducive to the stable control of the decomposition index;
[0005] 3. When the inspection is stopped, the feed volume of the decomposition tank running online increases, the decomposition time decreases, and the output rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for continuous operation of decomposition and graded production in an alumina plant, which is applied to the process of shutdown and maintenance of dissolution units. The system for decomposition and graded production includes four decomposition systems. The decomposition system includes a decomposition tank, a seed crystal tank, a seed crystal pump, Equipment such as mother liquor pump, vertical disc filter, overflow tank, propeller device (same as the prior art). The four decomposition systems are respectively 1# decomposition system, 2# decomposition system, 3# decomposition system and 4# decomposition system, wherein, 1# decomposition system, 2# decomposition system and 3# decomposition system are normal production decomposition systems , 4# decomposition system is a decomposition system for shutdown maintenance.

[0027] The method comprises the steps of:

[0028] (1) A first pipeline is used to connect the seed crystal pump in the 1# decomposition system...

Embodiment 2

[0035] A method for continuous operation of decomposition and graded production in an alumina plant, which is applied to the process of shutdown and maintenance of dissolution units. The system for decomposition and graded production includes four decomposition systems. The decomposition system includes a decomposition tank, a seed crystal tank, a seed crystal pump, Equipment such as mother liquor pump, vertical disc filter, overflow tank, propeller device (same as the prior art). The four decomposition systems are respectively 1# decomposition system, 2# decomposition system, 3# decomposition system and 4# decomposition system, wherein, 1# decomposition system, 2# decomposition system and 3# decomposition system are normal production decomposition systems , 4# decomposition system is a decomposition system for shutdown maintenance.

[0036] The method comprises the steps of:

[0037] (1) A first pipeline is used to connect the seed crystal pump in the 2# decomposition system...

Embodiment 3

[0044] A method for continuous operation of decomposition and graded production in an alumina plant, which is applied to the process of shutdown and maintenance of dissolution units. The system for decomposition and graded production includes four decomposition systems. The decomposition system includes a decomposition tank, a seed crystal tank, a seed crystal pump, Equipment such as mother liquor pump, vertical disc filter, overflow tank, propeller device (same as the prior art). The four decomposition systems are respectively 1# decomposition system, 2# decomposition system, 3# decomposition system and 4# decomposition system, wherein, 1# decomposition system, 2# decomposition system and 3# decomposition system are normal production decomposition systems , 4# decomposition system is a decomposition system for shutdown maintenance.

[0045] The method comprises the steps of:

[0046](1) A first pipeline is used to connect the seed crystal pump in the 3# decomposition system,...

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PUM

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Abstract

The invention discloses a continuous operation method for decomposition and graded production of an alumina plant, which belongs to the technical field of alumina production. The method for continuous operation of decomposition and graded production in an alumina plant comprises the following steps: 1) adopt a first pipeline to connect the seed crystal pump in the decomposition system of normal production, and pump part of the crystal seeds in the decomposition system of normal production to shutdown In the decomposition tank in the decomposition system for maintenance; 2) Use a second pipeline to connect the mother liquor pump in the decomposition system of normal production, and pump part of the mother liquor in the decomposition system of normal production to the decomposition tank in the decomposition system of shutdown maintenance Middle; 3) adopt a third pipeline to connect the vertical disc filter in the decomposition system of shutdown maintenance, the aluminum hydroxide slurry of the decomposition tank end tank in the decomposition system of shutdown maintenance is delivered to the vertical filter in the decomposition system of normal production Disc filter for solid-liquid separation. The invention ensures the stability of the decomposition system and is beneficial to the improvement of output rate and the balance of liquid volume.

Description

technical field [0001] The invention relates to the technical field of alumina production, in particular to a method for continuous operation of decomposition, staged production and continuous operation of an alumina plant. Background technique [0002] During the decomposition and classification production process of the alumina plant, every time one of the 1 to 5 dissolution units is shut down for inspection, the corresponding decomposition system is also stopped for inspection, the seed filter is stopped for inspection, and the decomposition tank realizes self-discharge by turning on the large circulation pump. Circulation; because there are 5 dissolution units for dissolution, there are only four systems for decomposition. When one system of decomposition is shut down for maintenance, the flow rate of decomposition tanks of other systems will increase. At present, there are mainly the following problems in this mode of operation: [0003] 1. The large circulation pump i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
CPCC01F7/02
Inventor 陈家术程好德张庚民陆桂楼白永华覃卫东陈中源李庆元韦忠平涂小颖李晨通陆武艺农光阮王柳午王有理李军陆勇敢
Owner GUANGXI HUAYIN ALUMINUM