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Tungsten-containing wastewater treatment method in tungsten smelting

A wastewater treatment and wastewater technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The large amount of equipment investment and other problems can achieve the effect of less auxiliary materials, improved recovery rate, and reduced pollution

Active Publication Date: 2010-10-20
厦门嘉鹭金属工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires the use of nanofiltration or ultrafiltration membrane equipment. The investment in the equipment is large, the membrane has high requirements on the properties of the solution, and the maintenance cost of the membrane is high. The general enterprise does not produce obvious advantages or economic benefits when using it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: 50m of waste water containing tungsten 3 (WO 3 content of 0.05g / L), adjust the pH to 9.5 with 150g / L dilute sulfuric acid, then add calcium chloride solution, the reaction temperature is 25°C, the reaction time is 3h, the settling time is 2h, and the final wastewater contains WO 3 Content 0.003g / L.

Embodiment 2

[0020] Embodiment 2: 50m of waste water containing tungsten 3 (WO 3 content of 0.05g / L), adjust the pH to 9.5 with 150g / L dilute sulfuric acid, then add calcium chloride solution, the reaction temperature is 35°C, the reaction time is 3h, the settling time is 2h, and the final wastewater contains WO 3 Content 0.002g / L.

Embodiment 3

[0021] Embodiment 3: 50m of waste water containing tungsten 3 (WO 3 content of 0.08g / L), adjust the pH to 9.0 with 150g / L dilute sulfuric acid, then add calcium chloride solution, the reaction temperature is 35°C, the reaction time is 3h, the settling time is 2h, and the final wastewater contains WO 3 Content 0.004g / L.

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PUM

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Abstract

The invention relates to an industrial wastewater treatment method, in particular to a tungsten-containing wastewater treatment method in tungsten smelting, which has the advantages of simple process, low cost and high metal recovery rate. The tungsten-containing wastewater treatment method comprises the following steps: pretreating tungsten-containing wastewater in tungsten smelting after ion exchange; chemically precipitating the pretreated tungsten-containing wastewater in tungsten smelting; and utilizing a chemical precipitation method to enable tungsten in the tungsten-containing wastewater to be precipitated and recovered. The invention has the advantages that the technological process is optimized, the technological flow is short, the quantity of the consumed auxiliary material is small, the WO3 recovery rate in the flow is improved, the environmental pollution is reduced, the indexes can be easily monitored and controlled and the clean production technology is realized.

Description

technical field [0001] The invention relates to a method for treating industrial wastewater, in particular to a method for treating wastewater containing tungsten in tungsten smelting. Background technique [0002] In the existing wet smelting process of tungsten, the waste water is discharged directly after the sodium tungstate solution is adsorbed by the ion exchange resin. [0003] Due to the limitations of the ion exchange process and the complexity of the raw materials, the WO in the wastewater after ion exchange 3 The content is always maintained at a certain value, most of which are greater than 0.05g / l. [0004] The above situation will lead to a decrease in the recovery rate of tungsten metal by 0.2% to 0.5%, which will increase the production cost of the enterprise and the consumption of tungsten resources. 3 More pollution treatment costs are required to enter the wastewater, which increases the cost of environmental treatment. [0005] The patent application w...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20
Inventor 朱宾权王海军郑枝木邓中威李振东
Owner 厦门嘉鹭金属工业有限公司