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Method for producing tungsten and tin chemical products through chemical metallurgical separation of tungsten-tin paragenic ore

A chemical product, tungsten-tin technology, which is applied in the field of tungsten-tin symbiotic ore to produce tungsten and tin chemical products, which can solve problems such as difficult separation, affecting the quality of tin and tin products, and waste

Inactive Publication Date: 2014-04-16
戴元宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, tungsten has been mixed into tin concentrate as an impurity, which is not only wasted as slag during tin smelting, but also affects the cost of tin smelting and the quality of tin products; while tin enters tungsten products as an impurity, even if the amount is very small, it is harmful to tungsten The quality of the product is also greatly affected
Over the years, Gejiu Xinjian Tin Mine, Yunnan Luda Company, Kunming Institute of Metallurgy, and Guangdong Branch of Beijing General Research Institute of Mining and Metallurgy have conducted a lot of experimental research on the separation of such symbiotic ores, but it is difficult to achieve separation. the goal of

Method used

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  • Method for producing tungsten and tin chemical products through chemical metallurgical separation of tungsten-tin paragenic ore
  • Method for producing tungsten and tin chemical products through chemical metallurgical separation of tungsten-tin paragenic ore
  • Method for producing tungsten and tin chemical products through chemical metallurgical separation of tungsten-tin paragenic ore

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Example 1: Production of ammonium paratungstate and tin dioxide from Gejiu Kafang tungsten-tin symbiotic mine in Yunnan

[0039] The main chemical composition of raw ore is: WO 3 is 13.48%, Sn is 4.13%;

[0040] The main component phase of raw ore is: FeWO 4 .MnWO 4 +SnO 2 ;

[0041] Main process: mineral wet grinding, dilute nitric acid conversion; tungsten immersion in ammonia water, ion exchange, ammonium analysis, concentrated crystallization to produce ammonium paratungstate; tin slag lignite reduction, sulfuric acid leaching, liquid phase oxidation, dehydration and drying to obtain tin dioxide; ammonia water as Absorb conversion agent to recover nitrogen oxides produced by acid hydrolysis; convert ammonium carbonate precipitation to recover metal ions; tungsten liquid mother liquor is separated from the alkaline analysis to recover tungsten; immersion tin mother liquor is treated by lime-bleaching powder-ferrous method to meet the standard discharge.

[0042]...

example 2

[0088] Example 2: Production of ammonium paratungstate and tin dioxide from tungsten-tin symbiotic mine in Tengchong, Yunnan

[0089] The main chemical composition of raw ore is: WO 3 is 16.21%, Sn is 6.82%;

[0090] The main component phase of raw ore is: CaWO 4 +SnO 2

[0091] Main technological process: the same as Example 1, such as

[0092] Grinding particle size: -120 mesh ≥ 95%

[0093] Dilute nitric acid conversion process conditions:

[0094] Nitric acid concentration: 9%

[0095] Nitric acid dosage: solid: liquid = 1:3

[0096] Reaction temperature: 95°C

[0097] Response time: 120 minutes

[0098] Ammonia water immersion tungsten process conditions are the same as Example 1

[0099] Tungsten ionization purification and analysis process conditions:

[0100] Tungsten liquid concentration: ~45 (WO 3 g / l)

[0101] Resin grade, analytical agent and concentration: same as Example 1

[0102]Tungsten mother liquor recovery separation and analysis process condi...

example 3

[0113] Example 3: Ammonium paratungstate and tin dioxide in Xichang tungsten-tin symbiotic mine in Sichuan

[0114] The main chemical composition of raw ore is: WO 3 is 39.16%, Sn is 7.22%;

[0115] The main component phase of raw ore is: CaWO 4 +SnO 2

[0116] Main technological process: the same as Example 1

[0117] Grinding particle size: ~ 120 mesh ≥ 95%

[0118] Dilute nitric acid conversion process conditions:

[0119] Nitric acid concentration: 9%

[0120] Nitric acid dosage: solid: liquid = 1:3

[0121] Reaction temperature: 95°C

[0122] Reaction time: 120min

[0123] Ammonia water immersion tungsten process conditions are the same as Example 1

[0124] Ammonium separation purification and analysis process conditions:

[0125] Tungsten liquid concentration: ~45 (WO 3 g / l)

[0126] Resin grade, analytical agent and concentration: same as Example 1

[0127] Tungsten mother liquor recovery separation and analysis process conditions:

[0128] Mother liquor...

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Abstract

The invention belongs to the field of chemical metallurgical technology, and particularly relates to a method for producing tungsten and tin chemical products directly from tungsten-tin paragenic ore by use of the chemical metallurgical technology. The method comprises the steps of grinding the tungsten-tin paragenic ore serving as a raw material, and performing acidolysis by use of nitric acid to obtain tungsten-tin mixed slag; dissolving the tungsten-tin mixed slag with ammonia water to obtain ammonium tungstate and tin slag; after the ammonium tungstate enters the solution, performing ion-exchange purification with anion gel resin and desorption with ammonium chloride or ammonia water to obtain high-purity ammonium paratungstate; with lignite as a reducing agent and a non-metal mineral as a stabilizer, performing reduction stabilization of the tin slag, and leaching out the tin with sulfuric acid; performing liquid-phase oxidation and dehydration drying to obtain tin dioxide; performing corresponding after-treatment on the waste gas and waste liquid generated in the preparation process. The method provided by the invention can be used for effectively producing tungsten and tin chemical products at the same time, avoids resource waste and can guarantee the quality of the tin products and relatively low cost as well as the quality of the tungsten products.

Description

technical field [0001] The invention belongs to the technical field of chemical metallurgy, and in particular relates to a method for directly producing tungsten and tin chemical products from tungsten-tin paragenetic ore which cannot be effectively utilized by traditional dressing and smelting technology by applying chemical metallurgy technology. Background technique [0002] my country is the world's largest tungsten-producing country and a major tin-producing country. In recent years, like other parts of the world, tungsten-tin symbiotic mines located in southern Yunnan and western Yunnan have produced more and more tungsten-tin symbiotic mines. Tens of millions of tons of tungsten-tin symbiotic mines are difficult to use General re-election and flotation or magnetic separation methods make it separation and enrichment. For a long time, tungsten has been mixed into tin concentrate as an impurity, which is not only wasted as slag during tin smelting, but also affects the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B3/14C22B3/24C22B34/36C22B25/00
CPCY02P10/20
Inventor 戴元宁
Owner 戴元宁
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