CN102251126A - Method for removing arsenic impurities from tin - Google Patents
Method for removing arsenic impurities from tin Download PDFInfo
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- CN102251126A CN102251126A CN2011101924802A CN201110192480A CN102251126A CN 102251126 A CN102251126 A CN 102251126A CN 2011101924802 A CN2011101924802 A CN 2011101924802A CN 201110192480 A CN201110192480 A CN 201110192480A CN 102251126 A CN102251126 A CN 102251126A
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- China
- Prior art keywords
- arsenic
- tin
- volatilization
- tin alloy
- vacuum
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- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 52
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 49
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012535 impurity Substances 0.000 title claims abstract description 15
- 229910001128 Sn alloy Inorganic materials 0.000 claims abstract description 16
- YOHSSIYDFWBWEQ-UHFFFAOYSA-N lambda2-arsanylidenetin Chemical compound [As].[Sn] YOHSSIYDFWBWEQ-UHFFFAOYSA-N 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- LULLIKNODDLMDQ-UHFFFAOYSA-N arsenic(3+) Chemical compound [As+3] LULLIKNODDLMDQ-UHFFFAOYSA-N 0.000 claims description 3
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- -1 aluminium arsenic Chemical compound 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000876852 Scorias Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for removing arsenic impurities from tin. The method comprises the following steps of: adding an arsenic-containing tin alloy into a vacuum furnace, wherein arsenic elements in the tin are volatilized under the conditions that pressure in the furnace is in the range of 0.1-50Pa, the temperature in the furnace is between 1000 DEG C and 1500 DEG C, and the volatilization time of the arsenic-containing tin alloy is more than 0.25h; condensing the arsenic elements to obtain a metal arsenic; and separating the arsenic from the tin to obtain crude arsenic containing more than 90% of arsenic, wherein the removal rate of arsenic is greater than 90%. The invention provides a novel process for removing the arsenic from tin; the whole process is safe and controllable; and the method has the advantages of convenience for operation, high recovery rate of tin and arsenic, no need of adding chemical reagents and no pollution on the environment.
Description
Technical field
Contain the method that the arsenic tin alloy is realized tin arsenic high efficiency separation thereby the invention provides a kind of the processing, belong to non-ferrous metal pyrometallurgical smelting technical field with vacuum volatilization.
Technical background
The thick tin of tin ore retailoring output contains plurality of impurities, even the tin of producing from rich tin concentrate, its purity can not satisfy user's requirement usually.Arsenic is a kind of common toxic impurity in the thick tin, and what of arsenic content will directly influence quality, performance and the purposes of tin product.As, the tin that the tinfoil paper of wrap food and dry plate are used requires arsenic content below 0.015%.Arsenic also can cause the outward appearance and the plasticity-variation of tin, increases the viscosity of tin.Arsenic content is 0.055% tin, and hardness can increase to Brinell hardness 8.7, the section of tin is granulated, the fragility of tin increases.
Thick tin composition depends primarily on the composition of tin concentrate, the technical process that concentrate refines pre-treatment operation and processing etc.At present, the thick tin composition fluctuation range that each smeltery produces is very big, but wherein the content of arsenic is usually between 0.5 ~ 6%, and the thick tin arsenic content of some Metal Production enterprise is higher.
At present, in tin refinement, need through centrifugal arsenic removal, condensation arsenic removal usually, add three operations of aluminium arsenic removal, could remove arsenic wherein in succession, make it to reach the arsenic content requirement of GB tin slab.This method needs high-temperature service, produces volume of smoke and slag in treating processes, and labor strength is big, and operating environment is abominable; And in adding aluminium arsenic removal operation, produce the aluminium slag that contains AlAs, and AlAs meets water, water vapour or damp atmosphere, is easy to generate the AsH of severe toxicity
3Gas brings huge potential safety hazard to environment.In addition, centrifugal slag, scoria, carbon slag and aluminium slag that the dearsenification operation produces can be carried away a large amount of metallic tins secretly, directly influence the direct yield of tin, reduce the business economic benefit.
Summary of the invention
The purpose of this invention is to provide a kind of method, thereby realize the high efficiency separation of tin arsenic, improve the performance of tin product with impurity arsenic in the vacuum volatilization processing removal tin alloy.
Technical scheme of the present invention is: with arsenic content is 0.5 ~ 10%(mass ratio) the arsenic tin alloy that contains send in the vacuum oven, temperature is that 1000 ~ 1500 ℃, pressure (vacuum tightness in the vacuum oven) are that 0.1 ~ 50Pa, volatilization time are more than the 0.25h in the control stove, impurity elements arsenic is volatilized from molten tin alloy, being gaseous state evaporates in the condenser, condensation obtains metallic arsenic and reclaims, and arsenic is separated with tin.As in the crude arsenic that recovery obtains＞90%, the clearance of arsenic＞90%.
The present invention provides a kind of new treatment process for containing the arsenic tin alloy, and whole technological process safety is controlled, easy to operate, and tin, arsenic rate of recovery height need not add chemical reagent, environmentally safe.
The present invention adopts vacuum volatilization technology, after arsenic evaporates in the tin, form with metallic arsenic is collected in the condenser, arsenic in not only can effective elimination tin, and greatly improved production environment, reduced labor strength, alleviated the treatment capacity that adds aluminium arsenic removal operation, reduced the generation of AlAs, greatly reduced the tin amount of being taken away by the aluminium slag, there have been huge environmental benefit, economic benefit, safety benefit in tin manufacturing enterprise.
The whole technological process safety of the present invention is controlled, easy to operate, need not to add any other additive, three-waste free discharge, volatilization process carries out in a vacuum, personnel and environment are not all had influence,, contain the different tin alloy of arsenic composition and all can be effectively addressed raw material universality height, can realize the serialization industrial production, can realize containing the innoxious removal of arsenic in the arsenic tin alloy, have environmental friendliness, characteristics such as safe and practical.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The present invention is further elaborated below in conjunction with drawings and Examples, but content of the present invention is not limited to described scope.
Embodiment 1: referring to Fig. 1, (Sn 81.54% with the thick tin raw material of 10t; Pb 9.14%; Sb0.094%; Bi 0.184%; As3.30%), send in the vacuum oven control vacuum oven internal pressure 0.5 ~ 6Pa scope, 1500 ℃, carry out vacuum volatilization 1.5h, impurity elements arsenic is volatilized from molten tin alloy, be gaseous state and evaporate in the condenser, it is that 98% crude arsenic reclaims that condensation obtains content, and arsenic is separated with tin.The clearance of arsenic is 95%.
Embodiment 2: referring to Fig. 1, (Sn 86.88% with the thick tin raw material of 10t; Pb 6.16%; Sb6.77%; Bi 0.23%; As 1.27%), send in the vacuum oven 1300 ℃ of control furnace pressure 45 ~ 50Pa, temperature, carry out continuously vacuum volatilizing 1h, impurity elements arsenic is volatilized from molten tin alloy, be gaseous state and evaporate in the condenser, it is that 99% crude arsenic reclaims that condensation obtains content, and arsenic is separated with tin.Collect crude arsenic 116.7kg altogether, the clearance of arsenic is 91%.
Embodiment 3: referring to Fig. 1, with the thick tin raw material (Sn84.68% of 20t; Pb 7.37%; Sb3.93%; Bi 2.61%; As 0.51%), send in the vacuum oven, furnace pressure 20 ~ 24Pa, 1200 ℃, carry out continuously vacuum volatilizing 2h, impurity elements arsenic is volatilized from molten tin alloy, be gaseous state and evaporate in the condenser, it is that 96% crude arsenic reclaims that condensation obtains content, and arsenic is separated with tin.Collect crude arsenic 95.6kg altogether, the clearance of arsenic is 90%.
Embodiment 4: referring to Fig. 1, with the thick tin raw material (Sn88.41% of 15t; Pb 7.17%; Sb3.03%; Bi 0.57%; As 0.58%), send in the vacuum oven, furnace pressure 46 ~ 50Pa, 1000 ℃, carry out continuously vacuum volatilizing 0.25h, impurity elements arsenic is volatilized from molten tin alloy, be gaseous state and evaporate in the condenser, it is that 98.8% crude arsenic reclaims that condensation obtains content, and arsenic is separated with tin.Collect crude arsenic 81kg altogether, the clearance of arsenic is 92%.
Claims (3)
1. method of from tin, removing impurity arsenic, it is characterized in that: will contain the arsenic tin alloy and send in the vacuum oven, by temperature, vacuum tightness and volatilization time in the control stove, impurity elements arsenic is volatilized from molten tin alloy, being gaseous state evaporates in the condenser, condensation obtains metallic arsenic, and arsenic is separated with tin.
2. the method for removing impurity arsenic from tin according to claim 1, it is characterized in that: in the arsenic volatilization process, the vacuum oven internal pressure is 0.1 ~ 50Pa, and volatilization temperature is 1000 ~ 1500 ℃, and the volatilization time is more than the 0.25h.
3. the method for removing impurity arsenic from tin according to claim 1 and 2, it is characterized in that: described containing in the arsenic tin alloy raw material, arsenic content is 0.5 ~ 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101924802A CN102251126A (en) | 2011-07-11 | 2011-07-11 | Method for removing arsenic impurities from tin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101924802A CN102251126A (en) | 2011-07-11 | 2011-07-11 | Method for removing arsenic impurities from tin |
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| Publication Number | Publication Date |
|---|---|
| CN102251126A true CN102251126A (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101924802A Pending CN102251126A (en) | 2011-07-11 | 2011-07-11 | Method for removing arsenic impurities from tin |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492861A (en) * | 2011-12-29 | 2012-06-13 | 昆明理工大学 | Fire refining method of crude tin |
| CN107841636A (en) * | 2017-09-27 | 2018-03-27 | 昆明理工大学 | A kind of preparation method of high purity tin |
| US10563289B2 (en) | 2017-06-29 | 2020-02-18 | Companhia Brasileira De Metalurgia E Mineracão | Process for refining niobium-based ferroalloys |
| WO2024060891A1 (en) * | 2022-09-20 | 2024-03-28 | 云南锡业股份有限公司锡业分公司 | Green and efficient refining method for complex crude tin |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072963A (en) * | 1991-12-03 | 1993-06-09 | 沈阳市中兴冶金实用技术研究所 | The preparation method of low-arsenic pure antimony |
| CN101942567A (en) * | 2010-10-22 | 2011-01-12 | 中南大学 | Method for removing arsenic and antimonic from anode sludge containing polyvalence composite type arsenic-antimonic compound |
-
2011
- 2011-07-11 CN CN2011101924802A patent/CN102251126A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072963A (en) * | 1991-12-03 | 1993-06-09 | 沈阳市中兴冶金实用技术研究所 | The preparation method of low-arsenic pure antimony |
| CN101942567A (en) * | 2010-10-22 | 2011-01-12 | 中南大学 | Method for removing arsenic and antimonic from anode sludge containing polyvalence composite type arsenic-antimonic compound |
Non-Patent Citations (2)
| Title |
|---|
| 王炜: "粗金属砷真空蒸馏预提纯实验研究", 《云南冶金》 * |
| 邱克强: "高砷焊锡真空蒸馏脱铅砷", 《中国有色金属学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492861A (en) * | 2011-12-29 | 2012-06-13 | 昆明理工大学 | Fire refining method of crude tin |
| US10563289B2 (en) | 2017-06-29 | 2020-02-18 | Companhia Brasileira De Metalurgia E Mineracão | Process for refining niobium-based ferroalloys |
| CN107841636A (en) * | 2017-09-27 | 2018-03-27 | 昆明理工大学 | A kind of preparation method of high purity tin |
| WO2024060891A1 (en) * | 2022-09-20 | 2024-03-28 | 云南锡业股份有限公司锡业分公司 | Green and efficient refining method for complex crude tin |
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Application publication date: 20111123 |