CN110184474B - Low-temperature casting process for lead anode plate - Google Patents
Low-temperature casting process for lead anode plate Download PDFInfo
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- CN110184474B CN110184474B CN201910410302.9A CN201910410302A CN110184474B CN 110184474 B CN110184474 B CN 110184474B CN 201910410302 A CN201910410302 A CN 201910410302A CN 110184474 B CN110184474 B CN 110184474B
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- lead
- copper
- lead liquid
- anode plate
- liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
- B22D25/04—Casting metal electric battery plates or the like
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/06—Refining
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
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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 belongs to the field of lead pyrometallurgical smelting, and relates to a low-temperature casting process for a lead anode plate, which comprises the steps of continuously removing copper from crude lead liquid to obtain impurity-removed lead liquid, cooling the impurity-removed lead liquid to 330-plus-340 ℃, further removing copper in the impurity-removed lead liquid through cooling and elution, and then casting under the constant temperature condition of 330-plus-340 ℃ to obtain the lead anode plate. Compared with the prior casting process of the lead anode plate, the invention has the beneficial effects that: the cooling elution ensures the deep removal of copper and other impurities, improves the purity of the anode plate, avoids foamed lead on the anode plate and improves the lead electrolysis current efficiency; meanwhile, the natural gas consumption is reduced due to low casting temperature.
Description
Technical Field
The invention belongs to the field of lead pyrometallurgy, and relates to a low-temperature casting process for a lead anode plate.
Background
The process flow adopted by the casting of the lead anode plate in most smelting plants at present is as follows: the crude lead is subjected to liquation copper removal in a copper removal pot, the copper content of lead liquid after copper removal is about 0.12 percent or even higher, then the lead liquid is cast at the temperature of 370-390 ℃, because the copper removal is not thorough, certain foamed lead exists on the cast anode plate, and after the anode plate with the foamed lead is electrolyzed, the foamed lead floats on the surface of an electrolytic bath to form short circuit, the current efficiency of lead electrolysis is seriously influenced, and further the economic benefit is influenced. The anode facing plate has a problem of lead foam.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the low-temperature casting process for the lead anode plate, which can effectively avoid the generation of foamed lead on the anode plate during casting and has the characteristics of simple operation, short process flow, good impurity removal effect and the like.
The technical scheme of the invention is as follows: a low-temperature casting process for a lead anode plate comprises the following steps:
s10, continuously removing copper from the crude lead liquid to obtain impurity-removed lead liquid;
s20, carrying out low-temperature elution on the lead liquid with the impurities removed from the S10 to further remove copper, so as to obtain a copper-removed lead liquid;
and S30, casting the obtained copper-removed lead liquid into a mold under the constant temperature condition, and cooling and demolding to obtain the lead anode plate.
According to the embodiment of the disclosure, the specific process of S10 is as follows:
s101, adding the crude lead liquid with the temperature of 850-900 ℃ into a continuous copper removal furnace,
and S102, adding sulfur according to the copper content of the crude lead liquid to obtain lead copper matte and impurity-removed lead liquid, wherein the copper content in the impurity-removed lead liquid is less than 1 wt%.
According to the embodiment of the disclosure, the specific process of S20 is as follows:
s201, adding a lead block into the obtained impurity-removed lead liquid, and cooling the impurity-removed lead liquid to 330-340 ℃;
s202, removing solid copper dross floating on the surface of the lead liquid to obtain a copper-removed lead liquid, wherein the copper content in the copper-removed lead liquid is 0.06-0.07 wt%.
According to the embodiment of the disclosure, the specific process of S30 is as follows:
s301, baking and heating a mold to be cast to 350 ℃ for 300-,
s302, removing the surface layer of the copper-removing lead liquid, wherein the removal amount is 0.1-0.4wt% of the total amount of the copper-removing lead liquid, casting the copper-removing lead liquid into a heated mould at the temperature of 330-340 ℃, and cooling and demoulding to obtain the lead anode plate.
According to the embodiment of the disclosure, the copper content of the lead anode plate is less than 0.06 wt%.
The lead anode plate is obtained by adopting the process for casting.
The invention has the beneficial effects that: by adopting the technical scheme, the method disclosed by the invention has the advantages that the deep removal of copper and other impurities is ensured by cooling and elution, the purity of the anode plate is improved, the foamed lead of the anode plate is avoided, and the lead electrolysis current efficiency is improved; meanwhile, the casting temperature is low, so that the consumption of natural gas is reduced, and meanwhile, the novel process reduces the copper content of the lead liquid to be below 0.06wt%, so that the problem of incomplete copper removal is solved, the generation of anode plate foamed lead is effectively avoided, and the current efficiency is improved.
Drawings
FIG. 1 is a flow chart of the low-temperature casting process of a lead anode plate.
Detailed Description
The present invention will be described in further detail below with reference to examples, but the scope of the present invention is not limited to these examples.
As shown in fig. 1, the low-temperature casting process of the lead anode plate of the invention comprises the following steps:
s10, continuously removing copper from the crude lead liquid to obtain impurity-removed lead liquid;
s20, carrying out low-temperature elution on the lead liquid with the impurities removed from the S10 to further remove copper, so as to obtain a copper-removed lead liquid;
and S30, casting the obtained copper-removed lead liquid into a mould under the constant temperature condition, and cooling and demoulding to obtain the lead anode plate.
According to the embodiment of the disclosure, the specific process of S10 is as follows:
s101, adding the crude lead liquid with the temperature of 850-900 ℃ into a continuous copper removal furnace,
and S102, adding sulfur according to the copper content of the crude lead liquid to obtain lead copper matte and impurity-removed lead liquid, wherein the copper content in the impurity-removed lead liquid is less than 1 wt%.
According to the embodiment of the disclosure, the specific process of S20 is as follows:
s201, adding a lead block into the obtained impurity-removed lead liquid, and cooling the impurity-removed lead liquid to 330-340 ℃;
s202, removing solid copper dross floating on the surface of the lead liquid to obtain a copper-removed lead liquid, wherein the copper content in the copper-removed lead liquid is 0.06-0.07 wt%.
According to the embodiment of the disclosure, the specific process of S30 is as follows:
s301, baking and heating a mold to be cast to 350 ℃ for 300-,
s302, removing the surface layer of the copper-removing lead liquid, wherein the removal amount is 0.1-0.4wt% of the total amount of the copper-removing lead liquid, casting the copper-removing lead liquid into a heated mould at the temperature of 330-340 ℃, and cooling and demoulding to obtain the lead anode plate.
According to the embodiment of the disclosure, the copper content of the lead anode plate is less than 0.06 wt%.
Example 1
Adding the crude lead liquid into a continuous decoppering furnace, adding sulfur according to the copper content of the lead liquid to obtain lead matte and an impurity-removed lead liquid, wherein the copper content of the impurity-removed lead liquid is less than 1wt%, cooling the impurity-removed lead liquid to 330 ℃, performing elution decoppering to obtain a decoppering lead liquid containing 0.065wt%, then keeping the temperature at 330 ℃, and performing casting to obtain a lead anode plate containing less than 0.04wt%, wherein no foamed lead is generated in the casting process.
Example 2
Adding the crude lead liquid into a continuous decoppering furnace, adding sulfur according to the copper content of the lead liquid to obtain lead matte and an impurity-removed lead liquid, wherein the copper content of the impurity-removed lead liquid is less than 1wt%, cooling the impurity-removed lead liquid to 335 ℃, performing elution decoppering to obtain a decoppering lead liquid containing 0.067wt%, then keeping the temperature at 335 ℃, and casting to obtain a lead anode plate containing less than 0.04wt%, wherein no foamed lead is generated in the casting process.
Example 3
Adding the crude lead liquid into a continuous decoppering furnace, adding sulfur according to the copper content of the lead liquid to obtain lead matte and an impurity-removed lead liquid, wherein the copper content of the impurity-removed lead liquid is less than 1wt%, cooling the impurity-removed lead liquid to 340 ℃, performing elution decoppering to obtain a decoppering lead liquid containing 0.07wt%, then keeping the temperature at 340 ℃, and casting to obtain a lead anode plate containing less than 0.05wt%, wherein no foamed lead is generated in the casting process.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (3)
1. The low-temperature casting process of the lead anode plate is characterized by comprising the following steps of:
s10, continuously removing copper from the crude lead liquid to obtain impurity-removed lead liquid;
s101, adding the crude lead liquid with the temperature of 850-900 ℃ into a continuous copper removal furnace,
s102, adding sulfur according to the copper content in the crude lead liquid to obtain lead copper matte and impurity-removed lead liquid, wherein the copper content in the impurity-removed lead liquid is less than 1wt%,
s20, carrying out low-temperature elution on the lead liquid with the impurities removed from the S10 to further remove copper, so as to obtain a copper-removed lead liquid;
s201, adding a lead block into the obtained lead liquid after impurity removal, and cooling the lead liquid after impurity removal to 330 ℃;
s202, removing solid copper dross floating on the surface of the lead liquid to obtain copper-removed lead liquid, wherein the copper content of the copper-removed lead liquid is 0.06-0.07wt%,
s30, casting the copper-removed lead solution obtained in the step S20 into a mould under the constant temperature condition, cooling and demoulding to obtain a lead anode plate,
s301, baking and heating a mold to be cast to 350 ℃ for 300-,
s302, removing floating slag on the surface of the copper-removed lead liquid, wherein the removing amount is 0.1-0.4wt% of the total amount of the copper-removed lead liquid, keeping the temperature at 330 ℃, casting the copper-removed lead liquid into a heated mould, and cooling and demoulding to obtain the lead anode plate.
2. The process of claim 1, wherein the lead anode plate has a copper content of 0.06wt% or less.
3. A lead anode plate cast by the process of any one of claims 1 to 2.
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| CN201910410302.9A CN110184474B (en) | 2019-05-16 | 2019-05-16 | Low-temperature casting process for lead anode plate |
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| CN110184474B true CN110184474B (en) | 2022-02-11 |
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Citations (7)
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|---|---|---|---|---|
| CN101260481A (en) * | 2008-05-06 | 2008-09-10 | 宁夏天马冶化（集团）股份有限公司 | Method for producing high-purity lead |
| CN102978416A (en) * | 2012-12-23 | 2013-03-20 | 河南豫光金铅股份有限公司 | Device and method for continuously removing copper from liquid crude lead |
| CN103540762A (en) * | 2012-07-11 | 2014-01-29 | 陕西锌业有限公司 | Lead melting copper removal refining process for industrial frequency coreless-type electric induction furnace |
| CN104674018A (en) * | 2014-12-22 | 2015-06-03 | 芜湖市民泰铜业有限责任公司 | Method for chemical copper removal of wet lead |
| CN104711433A (en) * | 2014-12-22 | 2015-06-17 | 芜湖市民泰铜业有限责任公司 | Method for removing copper of crude lead through cooling |
| CN106756090A (en) * | 2016-12-21 | 2017-05-31 | 中国恩菲工程技术有限公司 | The method of the continuous decopper(ing) of lead bullion |
| CN206799711U (en) * | 2017-04-14 | 2017-12-26 | 安徽省华鑫铅业集团有限公司 | Reviver low temperature continuous smelting device |
-
2019
- 2019-05-16 CN CN201910410302.9A patent/CN110184474B/en active Active
Patent Citations (7)
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| CN101260481A (en) * | 2008-05-06 | 2008-09-10 | 宁夏天马冶化（集团）股份有限公司 | Method for producing high-purity lead |
| CN103540762A (en) * | 2012-07-11 | 2014-01-29 | 陕西锌业有限公司 | Lead melting copper removal refining process for industrial frequency coreless-type electric induction furnace |
| CN102978416A (en) * | 2012-12-23 | 2013-03-20 | 河南豫光金铅股份有限公司 | Device and method for continuously removing copper from liquid crude lead |
| CN104674018A (en) * | 2014-12-22 | 2015-06-03 | 芜湖市民泰铜业有限责任公司 | Method for chemical copper removal of wet lead |
| CN104711433A (en) * | 2014-12-22 | 2015-06-17 | 芜湖市民泰铜业有限责任公司 | Method for removing copper of crude lead through cooling |
| CN106756090A (en) * | 2016-12-21 | 2017-05-31 | 中国恩菲工程技术有限公司 | The method of the continuous decopper(ing) of lead bullion |
| CN206799711U (en) * | 2017-04-14 | 2017-12-26 | 安徽省华鑫铅业集团有限公司 | Reviver low temperature continuous smelting device |
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| "铅精炼大极板工艺"泡沫铅"的产生和处理";武鹏举;《世界有色金属》;20170630;第9-10页 * |
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