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A treatment method for tungsten smelting phosphorus removal slag

A treatment method and technology for phosphorus slag, applied in the direction of improving process efficiency, can solve the problems of waste of tungsten resources, high tungsten content in phosphorus removal slag, affecting plant production, and recovery rate indicators, etc., to achieve cost savings and good process connection. Effect

Active Publication Date: 2016-03-02
HUNAN CHENZHOU MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the application of the technology, the high P content in the decomposition liquid has become a difficult problem to be solved by the process. The problem of high P, dephosphorization slag is the product of deep dephosphorization of decomposition solution after plate and frame filtration. Phosphorus removal slag contains high tungsten, and slag contains WO 3 It has reached 20%-30%, and the amount of phosphorus removal slag is large. There is a batch of phosphorus removal slag for every 8 batches of raw ore, and the dry weight of each batch of phosphorus removal slag has reached 550Kg-650Kg. Affects factory directness and recovery rate indicators, and causes a lot of waste of tungsten resources

Method used

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  • A treatment method for tungsten smelting phosphorus removal slag

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Embodiment 1

[0013] The phosphorus removal slag described in the present invention is the phosphorus removal slag produced in the process of the process of patent application number 201110032596.x: a method of deep purification and phosphorus removal of crude sodium tungstate solution-crystallization mother liquor.

[0014] 01 batches of phosphorus removal slag containing WO 3 20.67%, the wet weight of phosphorus removal slag is 1035Kg, the water content is 50%, and the dry weight is 517.5Kg. 3 The amount of metal is 106.97Kg. First pour the phosphorus removal slag into the slag returning tank and add water to stir. The liquid-solid ratio of water and slag is controlled at 4:1. After mixing evenly, put the material liquid into the middle tank, turn on the middle tank to stir, and add Add 79Kg of caustic soda to 100cm of water, stir evenly, put it into the middle tank and stir thoroughly, clean the residual alkali in the alkali-dissolving tank with clean water, add 66Kg85% industrial phosp...

Embodiment 2

[0016] 02 batches of phosphorus removal slag containing WO 3 31.74%, the wet weight of phosphorus removal slag is 1134Kg, the moisture content is 53%, and the dry weight is 533Kg. 3 The amount of metal is 169.17Kg. First pour the phosphorus removal slag into the slag returning tank and add water to stir. The liquid-solid ratio of water and slag is controlled at 4:1. After mixing evenly, put the material liquid into the middle tank, turn on the middle tank to stir, and add Add 118Kg caustic soda to 100cm of water, stir evenly, put it into the middle tank and stir fully, clean the residual alkali in the alkali-dissolving tank with clean water, add 100Kg phosphoric acid to the middle tank, and clean the residual acid in the alkali-dissolving tank with clean water after adding; After the completion, the material is fed into the reactor for full reaction. The temperature of the reactor is raised to 185°C, and the temperature is kept for 0.5 hours. After that, the exhaust is discha...

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Abstract

The invention discloses a treatment method for dephosphorized slag in tungsten metallurgy, and mainly relates to a method for extracting and separating tungsten from tungstenic dephosphorized slag generated by a dephosphorizing step in an ammonium paratungstate production process. The treatment method specifically comprises the following steps: immersing the dephosphorized slag generated by the dephosphorizing step in the ammonium paratungstate production process to an aqueous solution; after full reaction in a reaction kettle by adopting special leaching agents and activating agents, filtering to obtain a decomposing liquid and dephosphorized decomposition slag; washing the dephosphorized decomposition slag to enable the tungstenic WO3 to be less than or equal to 1.5%; feeding the generated decomposition liquid into a subsequent tungsten extraction process. According to the process, the comprehensive utilization rate of mineral resources is improved, the recovery rate of valuable metal tungsten is improved, and the process flows of reusing tungsten are shortened.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and specifically relates to a method for extracting and separating tungsten from tungsten-containing phosphorus removal slag produced in the production process of ammonium paratungstate. Background technique [0002] Metal tungsten is an important non-ferrous metal. In addition to being mainly used in metallurgy and manufacturing alloy steel, it is also widely used in other aspects such as chemical industry. At present, with the shortage of tungsten mineral resources, especially the rising price of tungsten products in recent years, the reasonable and comprehensive utilization of tungsten-containing phosphorus removal slag produced in the production process of ammonium paratungstate (APT) can not only create new opportunities for the reuse of enterprise resources. profit, but also create wealth for the country. [0003] With the continuous optimization of the APT process of scheelite production, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B34/36
CPCY02P10/20
Inventor 吴权芬杨运光廉亚军马金辉谈梦夏玉洁杨大智
Owner HUNAN CHENZHOU MINING CO LTD
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