A method and system for cleaning and recovering scabs in decomposition tanks

A recovery method and technology of a recovery system, applied in the field of decomposing tank scab cleaning recovery method and its system, can solve the problems of high cost, steam consumption, low recovery rate, etc., to improve production efficiency, avoid equipment maintenance, and improve screening rate effect

Active Publication Date: 2018-03-09
广西田东锦鑫化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a decomposing tank scab cleaning and recovery method and its system in view of the problems of steam consumption, high cost and low recovery rate in the treatment of decomposing tank scab in the alumina production project in the above-mentioned prior art

Method used

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  • A method and system for cleaning and recovering scabs in decomposition tanks
  • A method and system for cleaning and recovering scabs in decomposition tanks
  • A method and system for cleaning and recovering scabs in decomposition tanks

Examples

Experimental program
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Embodiment 1

[0032] A method for cleaning and recovering scabs in decomposition tanks, comprising the following steps:

[0033] (1) manual cleaning of scabs: manually clearing the scabs of the decomposition tank, and transporting the scabs cleaned up to the crushing site; Use the decomposing mother liquor to wash the unscarred sediment in the decomposition tank out of the manhole, then manually remove the scabs on the wall of the decomposition tank to remove the manhole, and finally clean the scarred manhole at the bottom of the decomposition tank with an air pick;

[0034] (2) Scab recovery treatment: use a crusher to crush the scabs on the scab feeding platform to obtain scabs with a particle size of ≤250mm, send the crushed scabs to the ball mill through the conveyor belt, and pump them into the ball mill Decompose the mother liquor for ball milling, the volume ratio of scab to decomposed mother liquor is 1:1, send the scab slurry after ball milling to the vibrating screen through the c...

Embodiment 2

[0039] The recovery method and recovery system are the same as in Example 1, and the inventive concept is the same, the difference is that the volume ratio of scarring to decomposed mother liquor is 1:3, and the decomposed mother liquor is introduced into the inlet of the feeding pump to adjust the solidity of the slurry. The content ratio is 700g / l, and the fan-shaped chute is divided into 5 fan-shaped guide grooves by partitions; the feeding pump and hydraulic pump are gear pumps with a flow rate of 35m 3 / h, the output pressure is 0.8Mpa; the distance between the control valve and the feeding pump is 3m.

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Abstract

The invention discloses a decomposing tank scab cleaning and recovery method and a system thereof. The decomposing tank scab cleaning and recovery method comprises the following steps of (1) cleaning scabs manually, and (2) recovering and treating the scabs. The system comprises a scab discharging platform, a crusher, a ball mill, a vibrating screen, a slurry tank, a decomposing mother liquor tank, a distributing box and a flat plate filter, wherein the scab discharging platform is connected with the crusher through a conveying belt; the crusher is connected with the ball mill through the conveying belt; the ball mill is connected with the vibrating screen through a chute; the vibrating screen is connected with the scab discharging platform through the conveying belt; the slurry tank is arranged at the bottom of the vibrating screen, and is connected with the distributing box through a connecting pipeline; a charging pump is arranged on the connecting pipeline; the distributing box is connected with the flat plate filter; the decomposing mother liquor tank is connected with inlets of the ball mill and the charging pump through the hydraulic pipelines respectively; and hydraulic pumps are arranged on the hydraulic pipelines. The decomposing tank scab cleaning and recovery method and the system are reasonable in design, low in cost, and high in recovery rate, and have popularization values.

Description

【Technical field】 [0001] The invention belongs to the field of alumina production, in particular to a method and system for cleaning and recovering scabs in decomposition tanks. 【Background technique】 [0002] The seed decomposition process in alumina production uses a large flat-bottomed mechanical agitation decomposition tank as the decomposition equipment. Due to the dead angle of agitation at the bottom of the tank, low stirring speed, high solid content, and design defects in the stirring itself, the operation process of the decomposition tank During the process, a large amount of aluminum hydroxide gradually deposited on the bottom of the tank and formed scars about 2 meters high. The height of scars around the tank even reached 3-5 meters, and the total amount of scars was more than 500 tons. Due to the gradual growth of scars However, the approach to the stirring blade will increase the stirring load, or rub the stirring blade or even crush the stirring, which will s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C21/00B02C23/08B02C23/16B09B3/00B09B5/00C01F7/02
CPCB02C21/00B02C23/08B02C23/16B02C2023/165B09B3/00B09B5/00C01F7/02
Inventor 赵志强
Owner 广西田东锦鑫化工有限公司
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