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Calcium vanadate slurry filtering system and method for realizing filtration by using same

A calcium vanadate and slurry technology, applied in the field of vanadium chemical industry, can solve the problems of high water inclusion in the filter residue, slow down the filtration speed, slow filtration speed, etc., and achieve the effects of controlling the filtration temperature, avoiding waste and fast filtration.

Active Publication Date: 2018-04-06
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional calcified vanadium precipitation process, it is necessary to filter the obtained calcium vanadate slurry. In order to ensure that the filtrate contains less suspended solids, the filter cloth is usually selected with a low pore size, resulting in slow filtration speed and cooling of the filtrate. , there is crystallization, which causes waste, and the precipitated crystals may block the filter cloth, further slow down the filtration speed, and form a vicious circle; at the same time, the amount of water contained in the filter residue obtained by the final filtration is too high, and further water removal is required, and the suspended solids in the filtrate If the content is too large, further filtration is still required, the steps are complicated, and resources are wasted

Method used

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  • Calcium vanadate slurry filtering system and method for realizing filtration by using same

Examples

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Embodiment 1

[0061] This example provides a method for filtering using a calcium vanadate slurry system for filtering.

[0062] Among them, the structural schematic diagram of the calcium vanadate slurry system is as follows: figure 1 As shown, it includes a slurry pretreatment device (1), a filter device (2), a storage device (3), a washing device (4) and a backflushing device (5). The slurry pretreatment device is a slurry treatment tank, the filter device is a single disc vacuum filter, the storage device is a filtrate buffer tank, the washing device is a three-stage countercurrent scrubber, and the back blowing device includes a pressure tank (51) and an air storage tank ( 52).

[0063] The discharge port of the slurry pretreatment device (1) is communicated with the feed inlet of the filter device (2) through the first conveying pipeline (6), and the upper part of the slurry pretreatment device (1) is provided with a return port, and the return port is connected to the The first ret...

Embodiment 2

[0070] This example provides a method for filtering using a calcium vanadate slurry system for filtering.

[0071] Wherein, the calcium vanadate slurry filtering system includes a slurry pretreatment device, a filtering device, a storage device, a washing device and a backflushing device. The slurry pretreatment device is a slurry treatment tank, the filter device is a single-disc vacuum filter, the storage device is a filtrate buffer tank, the washing device is a three-stage countercurrent scrubber, and the back blowing device includes a pressure tank and an air storage tank.

[0072] The discharge port of the slurry pretreatment device is connected with the feed port of the filter device through the first conveying pipeline. A delivery pipeline is commonly connected to the feed port of the filter device through the first three-way valve. The discharge port of the filter device is connected with the feed port of the storage device through the second conveying pipe, and a sec...

Embodiment 3

[0079] This example provides a method for filtering using a calcium vanadate slurry system for filtering.

[0080] Wherein, the calcium vanadate slurry filtering system includes a slurry pretreatment device, a filtering device, a storage device, a washing device and a backflushing device. The slurry pretreatment device is a slurry treatment tank, the filter device is a single-disc vacuum filter, the storage device is a filtrate buffer tank, the washing device is a three-stage countercurrent scrubber, and the back blowing device includes a pressure tank and an air storage tank.

[0081]The discharge port of the slurry pretreatment device is connected with the feed port of the filter device through the first conveying pipeline. A delivery pipeline is commonly connected to the feed port of the filter device through the first three-way valve. The discharge port of the filter device is connected with the feed port of the storage device through the second conveying pipe, and a seco...

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Abstract

The invention provides a calcium vanadate slurry filtering system and a method for realizing filtration by using the same. The system comprises a slurry pretreatment device, a filtering device and a storage device, wherein a discharging hole of the slurry pretreatment device communicates with a feeding hole of the filtering device; and a discharging hole of the filtering device communicates with afeeding hole of the storage device. Calcium vanadate slurry is filtered by using the calcium vanadate slurry filtering system provided by the invention, so that the aim of rapidly filtering the calcium vanadate slurry can be achieved; and a filter residue obtained by using the filtering method provided by the invention has the water content of lower than 16%, and the content of suspended mattersin a filtrate is lower than 70mg / L.

Description

technical field [0001] The invention belongs to the field of vanadium chemical industry, and relates to equipment and a filtering method for filtering calcium vanadate slurry. Background technique [0002] Vanadium pentoxide (V 2 o 5 ) is an indispensable raw material for modern industry. Vanadium metal or vanadium compounds are widely used in high-tech fields such as iron and steel industry, chemical industry, machinery, bridges, aviation and aerospace. Calcium vanadate is the raw material for the production of vanadium pentoxide. At present, the vanadium chemical industry at home and abroad mostly adopts the traditional vanadium extraction process, that is, the vanadium-containing solution is subjected to the process of calcification of vanadium precipitation-transsolution-ammonium precipitation to obtain high-purity partial vanadium ammonium acid, and then high-purity vanadium oxide products are obtained after high-temperature calcination. [0003] In the traditional c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/01B01D29/78B01D29/84B01D29/90
CPCB01D29/01B01D29/78B01D29/843B01D29/906
Inventor 李兰杰王海旭杜浩刘彪王少娜
Owner HEBEI IRON AND STEEL
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