CN104593621A - Method for producing crude tin from sodium stannate extraction residues - Google Patents
Method for producing crude tin from sodium stannate extraction residues Download PDFInfo
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- CN104593621A CN104593621A CN201410846900.8A CN201410846900A CN104593621A CN 104593621 A CN104593621 A CN 104593621A CN 201410846900 A CN201410846900 A CN 201410846900A CN 104593621 A CN104593621 A CN 104593621A
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- sodium stannate
- waste residue
- tin
- thick tin
- residues
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for producing crude tin from sodium stannate extraction residues. The method for producing crude tin from sodium stannate extraction residues comprises the following steps: (1) preparing materials: proportioning calcium carbonate, sodium stannate extraction residues and a reducing agent at a mass ratio of (1-5):5:1 and uniformly stirring to obtain a mixture; (2) heating: putting the mixture into a reacting furnace, stirring and heating to 400-500 DEG C to perform oxidation-reduction reaction for 1.5-2 hours; (3) smelting: further heating the mixture to 700-800 DEG C, reacting for 1.5-2 hours until liquid and residues are layered; and (4) discharging: carrying out solid-liquid separation on the liquid and residues which are layered, transferring the liquid into a die to obtain crude tin with a tin mass fraction of 98.50-99.95%. The method disclosed by the invention is low in energy consumption, low in cost and environmentally friendly, provides a new way for recycling sodium stannate extraction residues produced during sodium stannate producing process and satisfies requirements of circular economy.
Description
Technical field
The invention belongs to waste residue and recycle field, be specifically related to a kind of method utilizing sodium stannate leaching waste residue to produce thick tin.
Background technology
Sodium stannate (Na
2snO
3) of many uses, can be used for the fields such as the dyeing of zinc-plated, the printing and dyeing industry of field of electroplating.In sodium stannate production technique, what tradition used is alkaline hydrolysis, namely alkaline hydrolysis is adopt sodium hydroxide and stanniferous material to carry out pyroreaction under the condition of oxygenant, obtains thick sodium stannate, thick sodium stannate through leaching, removal of impurities, concentrate, oven dry, the operation such as packaging obtain sodium stannate product.Alkaline hydrolysis all can produce certain waste residue in reaction and leaching process, be referred to as sodium stannate and leach waste residue, these sodium stannates leach the tin mass content of waste residue 5% ~ 35%, and remaining composition includes insoluble carbonate salt, neobalgin, ferric hydroxide precipitate etc.Component content is complicated, and intractability is high, and this sodium stannate of general process leaches waste residue and usually adopts pyrometallurgical smelting to reclaim, but pyrometallurgical smelting exists the problems such as environmental pollution is large, energy consumption is high, tooling cost is high.Therefore, explore a kind of environmentally friendly, the method for utilization of resources type, recycle these sodium stannates and leach waste residue, improve the utilization ratio of stanniferous waste material, there is certain realistic meaning.We not yet find and how to recycle about producing in sodium stannate process the relevant report that sodium stannate leaches waste residue at present.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, provide that a kind of energy consumption is low, cost is low, environment amenable utilize sodium stannate to leach the method that thick tin produced by waste residue.
For realizing above-mentioned object, technical scheme of the present invention is:
Utilize sodium stannate leaching waste residue to produce a method for thick tin, comprise the following steps:
(1) prepare burden: calcium carbonate, sodium stannate are leached waste residue, reductive agent according to mass ratio (1 ~ 5): carry out proportioning at 5: 1, and stir to obtain compound;
(2) heat up: be fed into by compound in Reaktionsofen, stirring is warming up to 400 ~ 500 DEG C and carries out redox reaction, and the reaction times is 1.5-2h;
(3) melting: compound is continued raised temperature to 700 ~ 800 DEG C, reaction 1.5-2h, grain slag layering;
(4) discharging: by the grain slag solid-liquid separation of layering, its liquid imports the thick tin namely obtaining stanniferous massfraction 98.50 ~ 99.95% in mould.
The stanniferous massfraction that the above sodium stannate leaches in waste residue is 5% ~ 35%.
The above pure calcium carbonate is more than 99.5%.
The above reductive agent is carbon dust, coke or coal.
Compared with prior art; beneficial effect of the present invention is: sodium stannate is leached tin in waste residue by utilizing reductive agent by the present invention under the high temperature conditions; pass through redox reaction; tin is restored; under melting calcium carbonate makes protectant condition; oxygen in Xi Shui after reduction and air is completely cut off, realizes being separated of Xi Shui and smelting slag, finally obtain the thick tin that stanniferous amount is 98.50 ~ 99.95%.Energy consumption of the present invention is low, cost is low, environmentally friendly, provides a new way, meet the requirement of recycling economy for the sodium stannate in sodium stannate production process leaches waste residue utilization.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to the scope that embodiment represents.
In the embodiment of the present invention, sodium stannate leaches waste residue and derives from the waste residue that alkaline hydrolysis produces reaction in sodium stannate operation and leaching process, and calcium carbonate and reductive agent are all from buying on the market.
embodiment 1:
Utilize sodium stannate leaching waste residue to produce a method for thick tin, comprise the following steps:
(1) prepare burden: by 30kg calcium carbonate, 150kg sodium stannate leaches waste residue, 30kg carbon dust stirs to obtain compound; The stanniferous massfraction that sodium stannate leaches in waste residue is 5% ~ 35%;
(2) heat up: be fed into by compound in Reaktionsofen, stir and be warming up to 500 DEG C, keep reducing atmosphere, after reaction 2h, carbon dust and sodium stannate leach the tin generation redox reaction in waste residue, are restored by tin;
(3) melting: compound is continued raised temperature to 800 DEG C, makes the oxygen-barrier in Xi Shui and air under calcium carbonate molten state, after reaction 2h, and grain slag layering;
(4) discharging: scooped out by the smelting slag on upper strata, the Xi Shui of Reaktionsofen lower floor scoops out and places in mould, realizes being separated of Xi Shui and smelting slag, namely obtains the thick tin of stanniferous massfraction 98.63 %.
embodiment 2:
Utilize sodium stannate leaching waste residue to produce a method for thick tin, comprise the following steps:
(1) prepare burden: by 50kg calcium carbonate, 125kg sodium stannate leaches waste residue, 25kg carbon dust stirs to obtain compound; The stanniferous massfraction that sodium stannate leaches in waste residue is 5% ~ 35%;
(2) heat up: be fed into by compound in Reaktionsofen, stir and be warming up to 500 DEG C, keep reducing atmosphere, after reaction 2h, carbon dust and sodium stannate leach the tin generation redox reaction in waste residue, are restored by tin;
(3) melting: compound is continued raised temperature to 700 DEG C, makes the oxygen-barrier in Xi Shui and air under calcium carbonate molten state, after reaction 2h, and grain slag layering;
(4) discharging: scooped out by the smelting slag on upper strata, the Xi Shui of Reaktionsofen lower floor scoops out and places in mould, realizes being separated of Xi Shui and smelting slag, namely obtains the thick tin of stanniferous massfraction 99.92 %.
embodiment 3:
Utilize sodium stannate leaching waste residue to produce a method for thick tin, comprise the following steps:
(1) prepare burden: by 60kg calcium carbonate, 100kg sodium stannate leaches waste residue, 20kg carbon dust stirs to obtain compound; The stanniferous massfraction that sodium stannate leaches in waste residue is 5% ~ 35%;
(2) heat up: be fed into by compound in Reaktionsofen, stir and be warming up to 500 DEG C, keep reducing atmosphere, after reaction 2h, carbon dust and sodium stannate leach the tin generation redox reaction in waste residue, are restored by tin;
(3) melting: compound is continued raised temperature to 750 DEG C, makes the oxygen-barrier in Xi Shui and air under calcium carbonate molten state, after reaction 2h, and grain slag layering;
(4) discharging: scooped out by the smelting slag on upper strata, the Xi Shui of Reaktionsofen lower floor scoops out and places in mould, realizes being separated of Xi Shui and smelting slag, namely obtains the thick tin of stanniferous massfraction 99.15 %.
embodiment 4:
Utilize sodium stannate leaching waste residue to produce a method for thick tin, comprise the following steps:
(1) prepare burden: by 80kg calcium carbonate, 100kg sodium stannate leaches waste residue, 20kg carbon dust stirs to obtain compound; The stanniferous massfraction that sodium stannate leaches in waste residue is 5% ~ 35%;
(2) heat up: be fed into by compound in Reaktionsofen, stir and be warming up to 500 DEG C, keep reducing atmosphere, after reaction 2h, carbon dust and sodium stannate leach the tin generation redox reaction in waste residue, are restored by tin;
(3) melting: compound is continued raised temperature to 800 DEG C, makes the oxygen-barrier in Xi Shui and air under calcium carbonate molten state, after reaction 2h, and grain slag layering;
(4) discharging: scooped out by the smelting slag on upper strata, the Xi Shui of Reaktionsofen lower floor scoops out and places in mould, realizes being separated of Xi Shui and smelting slag, namely obtains the thick tin of stanniferous massfraction 99.04 %.
embodiment 5:
Utilize sodium stannate leaching waste residue to produce a method for thick tin, comprise the following steps:
(1) prepare burden: by 100kg calcium carbonate, 100kg sodium stannate leaches waste residue, 20kg carbon dust stirs to obtain compound; The stanniferous massfraction that sodium stannate leaches in waste residue is 5% ~ 35%;
(2) heat up: be fed into by compound in Reaktionsofen, stir and be warming up to 500 DEG C, keep reducing atmosphere, after reaction 1.5h, carbon dust and sodium stannate leach the tin generation redox reaction in waste residue, are restored by tin;
(3) melting: compound is continued raised temperature to 800 DEG C, makes the oxygen-barrier in Xi Shui and air under calcium carbonate molten state, after reaction 1.5h, and grain slag layering;
(4) discharging: scooped out by the smelting slag on upper strata, the Xi Shui of Reaktionsofen lower floor scoops out and places in mould, realizes being separated of Xi Shui and smelting slag, namely obtains the thick tin of stanniferous massfraction 98.76 %.
Above-described embodiment, be only the specific case further described object of the present invention, technical scheme and beneficial effect, the present invention is not defined in this.All make within scope disclosed by the invention any amendment, equivalent replacement, improvement etc., be all included within protection scope of the present invention.
Claims (4)
1. utilize sodium stannate leaching waste residue to produce a method for thick tin, it is characterized in that: comprise the following steps:
(1) prepare burden: calcium carbonate, sodium stannate are leached waste residue, reductive agent according to mass ratio (1 ~ 5): carry out proportioning at 5: 1, and stir to obtain compound;
(2) heat up: be fed into by compound in Reaktionsofen, stirring is warming up to 400 ~ 500 DEG C and carries out redox reaction, and the reaction times is 1.5-2h;
(3) melting: compound is continued raised temperature to 700 ~ 800 DEG C, reaction 1.5-2h, grain slag layering;
(4) discharging: by the grain slag solid-liquid separation of layering, its liquid imports the thick tin namely obtaining stanniferous massfraction 98.50 ~ 99.95% in mould.
2. the method utilizing sodium stannate leaching waste residue to produce thick tin according to claim 1, is characterized in that: the stanniferous massfraction that described sodium stannate leaches in waste residue is 5% ~ 35%.
3. the method utilizing sodium stannate leaching waste residue to produce thick tin according to claim 1, is characterized in that: described pure calcium carbonate is more than 99.5%.
4. the method utilizing sodium stannate leaching waste residue to produce thick tin according to claim 1, is characterized in that: described reductive agent is carbon dust, coke or coal.
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| CN201410846900.8A CN104593621B (en) | 2014-12-31 | 2014-12-31 | Sodium stannate is utilized to leach the method that waste residue produces thick stannum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611492A (en) * | 2018-04-17 | 2018-10-02 | 安徽华铂再生资源科技有限公司 | A kind of technique that thick tin is smelted in the press filtration solids from sodium stannate solution |
| CN113737016A (en) * | 2021-09-18 | 2021-12-03 | 安徽华铂再生资源科技有限公司 | Process for smelting crude tin from sodium stannate solution filter-pressed solid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532096A (en) * | 2009-04-01 | 2009-09-16 | 深圳市危险废物处理站有限公司 | A recovery method of tin in tin-stripping waste liquid |
| CN101532091A (en) * | 2009-04-17 | 2009-09-16 | 深圳市中金岭南有色金属股份有限公司韶关冶炼厂 | Technology of extracting and separating valuable metals such as Pb, In, Sb, Cu and Sn from lead smelting converter slags |
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- 2014-12-31 CN CN201410846900.8A patent/CN104593621B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532096A (en) * | 2009-04-01 | 2009-09-16 | 深圳市危险废物处理站有限公司 | A recovery method of tin in tin-stripping waste liquid |
| CN101532091A (en) * | 2009-04-17 | 2009-09-16 | 深圳市中金岭南有色金属股份有限公司韶关冶炼厂 | Technology of extracting and separating valuable metals such as Pb, In, Sb, Cu and Sn from lead smelting converter slags |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611492A (en) * | 2018-04-17 | 2018-10-02 | 安徽华铂再生资源科技有限公司 | A kind of technique that thick tin is smelted in the press filtration solids from sodium stannate solution |
| CN113737016A (en) * | 2021-09-18 | 2021-12-03 | 安徽华铂再生资源科技有限公司 | Process for smelting crude tin from sodium stannate solution filter-pressed solid |
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| CN104593621B (en) | 2016-08-24 |
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Effective date of registration: 20160614 Address after: 545026 the Guangxi Zhuang Autonomous Region Liuzhou Liu Dong New Area Bay Road No. 2 East standard workshop No. 2 supporting office building No. 314 Applicant after: Liuzhou Bairente Advanced Materials Co., Ltd. Address before: 545036 the Guangxi Zhuang Autonomous Region Liuzhou city and the Industrial District Pavilion North Avenue Applicant before: LIUZHOU CHINA TIN TIN & INDIUM MATERIAL CO., LTD. |
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Effective date of registration: 20200316 Address after: 547000 No.71, Chengxi Road, Hechi City, Guangxi Zhuang Autonomous Region Patentee after: GUANGXI HUAXI GROUP Co.,Ltd. Address before: 545026 the Guangxi Zhuang Autonomous Region Liuzhou Liu Dong New Area Bay Road No. 2 East standard workshop No. 2 supporting office building No. 314 Patentee before: LIUZHOU BAIRENTE ADVANCED MATERIALS Co.,Ltd. |