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Ion exchange process for recovering tungsten from tungsten-containing diluted solution wastewater

An ion exchange and anion exchange column technology, applied in ion exchange water/sewage treatment, water pollutants, water/sewage treatment and other directions, can solve the problems of poor process index and use effect, shorten the time spent on desorption, The effect of increasing the exchange capacity and increasing the tungsten adsorption rate

Active Publication Date: 2017-04-19
CNMC GUANGXI PGMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is not good in the actual production application process index and use effect

Method used

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  • Ion exchange process for recovering tungsten from tungsten-containing diluted solution wastewater

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Experimental program
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Effect test

Embodiment 1

[0025] An ion exchange process for recovering tungsten from tungsten-containing dilute solution wastewater, such as figure 1 shown, including: the WO 3 Adjust the pH value of the tungsten-containing dilute solution wastewater with a concentration of 1g / L to 3.5, and then use compressed air to aerate for 30 minutes, every 200m 3 The wastewater containing dilute tungsten solution is aerated with a fan, and the air intake of each fan is 8m 3 / min, filter after the aeration is completed, and the obtained filtrate is the prepared liquid; the prepared liquid is pumped into the macroporous weak base anion exchange column D301 to adsorb tungsten, and the exchange flow rate is kept at 8m 3 / h, the NaOH solution of 80g / L is used to desorb the tungsten adsorbed by the ion exchange column after the adsorption is completed. After the desorption is completed, the resin in the exchange column is regenerated with sulfuric acid with a mass concentration of 130g / L (the recovery rate of tungste...

Embodiment 2

[0027] An ion exchange process for recovering tungsten from tungsten-containing dilute solution wastewater, such as figure 1 shown, including: the WO 3 Adjust the pH value of the tungsten-containing dilute solution wastewater with a concentration of 1g / L to 5, and then use compressed air to aerate for 60 minutes, every 200m 3 The wastewater containing dilute tungsten solution is aerated with a fan, and the air intake of each fan is 10m 3 / min, filter after the aeration is completed, and the obtained filtrate is the prepared liquid; the prepared liquid is pumped into the macroporous weak base anion exchange column D201 to adsorb tungsten, and the exchange flow rate is kept at 8m 3 / h, the NaOH solution of 80g / L is used to desorb the tungsten adsorbed by the ion exchange column after the adsorption is completed. After the desorption is completed, the resin in the exchange column is regenerated with sulfuric acid with a mass concentration of 130g / L (the recovery rate of tungsten...

Embodiment 3

[0029] An ion exchange process for recovering tungsten from tungsten-containing dilute solution wastewater, such as figure 1 shown, including: the WO 3The tungsten-containing dilute solution wastewater with a concentration of 1g / L is adjusted to pH 4.2 with concentrated sulfuric acid or waste acid solution, and then aerated with compressed air for 45 minutes, every 200m 3 The wastewater containing dilute tungsten solution is aerated with a fan, and the air intake of each fan is 9m 3 / min, filter after the aeration is completed, and the obtained filtrate is the prepared liquid; the prepared liquid is pumped into the macroporous weak base anion exchange column D314 to adsorb tungsten, and the exchange flow rate is kept at 8m 3 / h, the NaOH solution of 80g / L is used to desorb the tungsten adsorbed by the ion exchange column after the adsorption is completed. After the desorption is completed, the resin in the exchange column is regenerated with sulfuric acid with a mass concentr...

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Abstract

The present invention discloses an ion exchange process for recovering tungsten from tungsten-containing diluted solution wastewater. The ion exchange process comprises: adjusting the pH value of tungsten-containing diluted solution wastewater to 3.5-5; carrying out aeration for 30-60 min by using compressed air, wherein per 200 m<3> of the tungsten-containing diluted solution wastewater is subjected to aeration by using one fan, and the gas inlet amount of each fan is 8-10 m<3> / min; after completing the aeration, filtering, wherein the obtained filtrate is a modulation liquid; and pumping the modulation liquid into a macroporous weak base anion exchange column, adsorbing tungsten, and carrying out adsorption and recovery on the tungsten adsorbed by the ion exchange column after completing the adsorbing. According to the present invention, with the process, the tungsten recovery rate can be effectively improved, arsenic, phosphorus, silicon, chlorine and other impurities in the tungsten-containing diluted solution wastewater can be subjected to a certain removal so as to substantially improve the production economic benefit of the factory.

Description

technical field [0001] The invention relates to the technical field of tungsten recovery, in particular to an ion exchange process for recovering tungsten from tungsten-containing dilute solution wastewater. Background technique [0002] With the decrease of high-quality tungsten resources in my country, the current mainstream process of tungsten smelting in my country is to produce ammonium paratungstate (APT) by ion exchange method. In the process of preparing APT, about 10% to 15% of tungsten enters various slag washing water and APT crystallization mother liquor, and the tungsten concentration of this part of the solution is relatively low. Sediment filtration and discharge of washing water waste containing WO 3 About 0.1~2g / L, post-coital fluid discharged by ion exchange contains WO 3 About 0.1~0.5g / L, the evaporation crystallization mother liquor contains WO 3 About 5~20g / L. The reasonable and effective recycling of these tungsten-containing dilute solutions is par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C02F9/04C02F101/20C02F1/28C02F1/66C02F1/00C02F1/52C02F1/56
CPCC02F1/001C02F1/28C02F1/42C02F1/52C02F1/56C02F1/66C02F9/00C02F2101/20C02F2303/16
Inventor 谢泉文
Owner CNMC GUANGXI PGMA
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