CN100441709C - Method of refining noble lead or dore silver - Google Patents
Method of refining noble lead or dore silver Download PDFInfo
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- CN100441709C CN100441709C CNB200610034954XA CN200610034954A CN100441709C CN 100441709 C CN100441709 C CN 100441709C CN B200610034954X A CNB200610034954X A CN B200610034954XA CN 200610034954 A CN200610034954 A CN 200610034954A CN 100441709 C CN100441709 C CN 100441709C
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Abstract
A precious lead or crude silver refining method for refining precious lead or crude silver comprises three working stages as follows: melting precious lead or crude silver in a converter and then performing an arsenic and stibium removing refining task through air oxidation at 900-1000 DEG C; performing a second working stage of silicon-addition and lead-removing, with the temperature being controlled at the range of 1000-2000DEG C and SiO2 being added into the furnace in batches, wherein air is blasted into the furnace for 1-2 hours for each time of addition of TiO2, the blowing intensity is controlled at the range of 0.02-0.05 MPa, and the total amount of SiO2 added into the furnace is 6%-30% of the lead content which is determined in advance for an analysis of precious lead or crude silver; and then a third working stage of bismuth removal and copper removal through a method of air blasting oxidation or adding oxidizing compounds therein. Said method is capable of improving lead removal efficiency for silver oxidation refining, reducing the job time, reducing the energy consumption and the cost, decreasing the amount of some heavy metal soot dust (such as lead) during the working process, and optimizing the working environment.
Description
Technical field
The present invention relates to a kind of method of refining to precious metals containing lead or thick silver.
Background technology
The raw material of silver oxidation refining is generally precious metals containing lead or thick silver, contains impurity such as a large amount of copper, lead, bismuth, antimony in the raw material.Traditional oxidation refining method is to carry out in converter, by controlling suitable temperature, the mode that adopts the air blast oxidation stage by stage remove impurity such as antimony, arsenic, lead, bismuth, copper, obtain containing the electrum of gold and silver more than 97%.
General lead tolerance is between 40%～60% in the raw material, and the deleading operation is the critical process of whole silver-colored oxidation refining operation.Traditional method, the operation of oxidation deleading by the air blast oxidation, are oxidized to plumbous oxide with lead merely, cause shoddye to be removed, and part lead is transformed into plumbous oxide and enters flue dust.The shortcoming of this method is that the activity duration is longer, consumes a large amount of fuel oils; Produce more lead dust, environment is affected.And blowing has caused the loss of gold and silver for a long time.Shortcomings such as have the energy consumption height, environment is poor, and the gold and silver rate of recovery is low.
Summary of the invention
The objective of the invention is for solving in existing precious metals containing lead or the thick silver-colored method of refining by the existing shortcoming of simple air blast oxidation deleading, and the precious metals containing lead or the thick silver-colored method for refining of development, to have improved deleading efficient, cut down the consumption of energy and cost, improve the gold and silver direct yield, reduce the quantum of output of heavy metal flue dust such as lead in the operation process.
Technical scheme proposed by the invention is, by three sessions precious metals containing lead or thick silver are carried out refining, earlier precious metals containing lead or thick silver are melted in converter, under 900～1000 ℃ of temperature, carry out air blast oxidation arsenic removal, antimony refinery process, this is the refinery process fs, and what this sessions adopted is existing conventional art; After described fs oxidation arsenic removal, antimony refinery process were finished, that carries out subordinate phase added the operation of silicon deleading, adds silicon deleading sessions at this, and temperature is controlled at 1000～1200 ℃, adds SiO in batches in stove
2, add SiO at every turn
2Air blast is 1～2 hour in the Shi Xianglu, and the control blast intensity is 0.02～0.05MPa, adds SiO in stove
2Total amount be to precious metals containing lead or thick silver material in advance the determined lead tolerance of sampling analysis 6%～30%, this sessions is the innovative characteristics place of the inventive method; After the deleading sessions is finished, remove the sessions of bismuth, copper removal by air blast oxidation or the method that adds oxygenant, this was the 3rd operation stage, the employing of this sessions also be existing conventional art.
Preferred processing condition are:
In adding in the operation of silicon deleading of subordinate phase, in stove, add SiO
2Overall control precious metals containing lead or thick silver material in advance the determined lead tolerance of sampling analysis 8%～25%.
Carry out subordinate phase add the operation of silicon deleading the time, divide 3～5 batches and in stove, add SiO
2Each batch adds SiO
2Amount can be in following ratio arrangement: first batch adds SiO
2Amount can account for and add SiO
250%～65% of total amount, later batch is successively decreased one by one.
The present invention is applicable to the silver-colored oxidation refining deleading operation of all raw materials.Technological operation is to carry out in traditional silver-colored oxidation refining equipment converter, does not need to increase any equipment.In silver-colored oxidation refining process, remove antimony, arsenic and remove bismuth, the copper operation is the same with traditional method, just 8%～30% SiO of raw material lead tolerance quantity is pressed in adding in silver-colored oxidation refining process
2, control suitable technical qualification, lead is changed into lead silicate, thereby plumbous oxidation is removed from slag.Precious metals containing lead or thick silver material are through the inventive method refining, but the output silver content is at the silver anode plate more than 97%.
The invention compared with prior art, its biggest advantage is just by when silver-colored oxidation refining subordinate phase is carried out the deleading operation, by adding SiO
2Temperature and the blowing condition suitable with control are removed the rapid oxidative slagging of plumbous quilt, reach the purpose of quick deleading.
The positively effect of the inventive method shows as:
1, improved the efficient of silver-colored oxidation refining deleading, reduced the activity duration, can be contracted to 1/2nd of traditional technology working cycle, reduced energy consumption and cost;
2, can improve the direct yield of silver effectively;
3, ability reduces the quantum of output of heavy metal flue dust such as lead in the operation process effectively, has optimized operating environment.
Therefore, the present invention realizes saving energy and reduce the cost for improving China's silver purified technological improvement, improves the technology content of traditional technology, promotes silver-colored industrial development to have bigger realistic meaning.
Embodiment
Embodiment one
The precious metals containing lead refinery practice is as follows: the total treatment capacity of precious metals containing lead raw material is 12 tons; Through the precious metals containing lead lead tolerance of sampling analysis in advance is 46.8%.By the fs after carrying out air blast oxidation oxidation under 1000 ℃ of temperature and removing antimony, arsenic operation; Add the operation of " silicon " deleading, carry out altogether adding SiO 4 times according to technical qualification
2(being silica sand) operation adds SiO for the first time
2Amount is 300 kilograms, adds SiO for the second time
2Amount is 100 kilograms, adds SiO for the third time
2Amount is 60 kilograms, adds SiO the 4th time
2Amount is 20 kilograms, adds SiO at every turn
2Back air blast oxidization time is about 1 hour, and blast is 0.03MPa, and Control for Kiln Temperature is at 1200 ℃.Remove bismuth, copper removal operation by follow-up air blast oxidation then, the finished product silver anode plate argentiferous 98.2% meets the requirement of silver-colored electrolytic anode fully.
Embodiment two
Thick silver-colored refinery practice is as follows: the thick total treatment capacity of silver material is 6.5 tons; Through the thick silver-colored lead tolerance of sampling analysis in advance is 44.6%.By the fs after carrying out air blast oxidation oxidation under 950 ℃ of temperature and removing antimony, arsenic operation; Add the operation of " silicon " deleading, carry out altogether adding SiO 4 times according to technical qualification
2(being silica sand) operation adds SiO for the first time
2Amount is 200 kilograms, adds SiO for the second time
2Amount is 60 kilograms, adds SiO for the third time
2Amount is 40 kilograms, adds SiO at every turn
2Back air blast oxidization time is about 1.5 hours, and blast is 0.04MPa, and Control for Kiln Temperature is at 1200 ℃.Remove bismuth, copper removal operation by follow-up air blast oxidation then,, the finished product silver anode plate argentiferous 98.5% meets the requirement of silver-colored electrolytic anode fully.
Embodiment three
The precious metals containing lead refinery practice is as follows: the total treatment capacity of precious metals containing lead raw material is 8.5 tons; Through the precious metals containing lead lead tolerance of sampling analysis in advance is 42.6%.By the fs after carrying out air blast oxidation oxidation under 1000 ℃ of temperature and removing antimony, arsenic operation; Add the operation of " silicon " deleading, carry out altogether adding SiO 4 times according to technical qualification
2(being silica sand) operation adds SiO for the first time
2Amount is 500 kilograms, adds SiO for the second time
2Amount is 200 kilograms, adds SiO for the third time
2Amount is 100 kilograms, adds SiO the 4th time
2Amount is 30 kilograms, adds SiO at every turn
2Back air blast oxidization time is about 1 hour, and blast is 0.03MPa, and Control for Kiln Temperature is at 1100 ℃.Remove bismuth, copper removal operation by follow-up air blast oxidation then, the finished product silver anode plate argentiferous 98.6% meets the requirement of silver-colored electrolytic anode fully.
Embodiment four
The precious metals containing lead refinery practice is as follows: the total treatment capacity of precious metals containing lead raw material is 11.0 tons; Through the precious metals containing lead lead tolerance of sampling analysis in advance is 43.2%.By the fs after carrying out air blast oxidation oxidation under 1000 ℃ of temperature and removing antimony, arsenic operation; Add the operation of " silicon " deleading, carry out altogether adding SiO 4 times according to technical qualification
2(being silica sand) operation adds SiO for the first time
2Amount is 600 kilograms, adds SiO for the second time
2Amount is 350 kilograms, adds SiO for the third time
2Amount is 150 kilograms, adds SiO the 4th time
2Amount is 30 kilograms, adds SiO at every turn
2Back air blast oxidization time is about 1 hour, and blast is 0.04MPa, and Control for Kiln Temperature is at 1100 ℃.Remove bismuth, copper removal operation by follow-up air blast oxidation then, the finished product silver anode plate argentiferous 98.5% meets the requirement of silver-colored electrolytic anode fully.
Claims (4)
1. a precious metals containing lead or thick silver-colored method of refining, earlier precious metals containing lead or thick silver are melted in converter, under 900～1000 ℃ of temperature, carry out air blast oxidation arsenic removal, antimony refinery process, it is characterized in that after described fs oxidation arsenic removal, antimony refinery process are finished, add the operation of silicon deleading, add silicon deleading sessions at this, temperature is controlled at 1000～1200 ℃, adds SiO in batches in stove
2, add SiO at every turn
2Air blast is 1～2 hour in the Shi Xianglu, and the control blast intensity is 0.02～0.05MPa, adds SiO in stove
2Total amount be to precious metals containing lead or thick silver material in advance the determined lead tolerance of sampling analysis 6%～30%; After the deleading sessions is finished, remove the sessions of bismuth, copper removal by the method for air blast oxidation or adding oxygenant.
2. precious metals containing lead according to claim 1 or thick silver-colored method of refining is characterized in that: in adding in the operation of silicon deleading of subordinate phase, add SiO in stove
2Total amount be to precious metals containing lead or thick silver material in advance the determined lead tolerance of sampling analysis 8%～25%.
3. precious metals containing lead according to claim 1 or thick silver-colored method of refining is characterized in that: in adding in the operation of silicon deleading of subordinate phase, divide 3～5 batches and add SiO in stove
2
4. according to claim 1 or 3 described precious metals containing lead or thick silver-colored method of refining, it is characterized in that: add the operation of silicon deleading what carry out subordinate phase, in stove, add SiO in batches
2The time, first batch adds SiO
2Amount account for and add SiO
250%～65% of total amount, later batch is successively decreased one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610034954XA CN100441709C (en) | 2006-04-11 | 2006-04-11 | Method of refining noble lead or dore silver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610034954XA CN100441709C (en) | 2006-04-11 | 2006-04-11 | Method of refining noble lead or dore silver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101054627A CN101054627A (en) | 2007-10-17 |
| CN100441709C true CN100441709C (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610034954XA Expired - Fee Related CN100441709C (en) | 2006-04-11 | 2006-04-11 | Method of refining noble lead or dore silver |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358298B (en) * | 2008-09-25 | 2010-06-02 | 昆明理工大学 | Desilverization method during bismuth refining procedure |
| CN101880777B (en) * | 2010-07-15 | 2012-02-22 | 山东黄金矿业(莱州)有限公司精炼厂 | Method for removing bismuth and antimony in electrolytic silver powder by utilizing clay-graphite crucible for smelting |
| CN102061395B (en) * | 2010-12-10 | 2012-09-26 | 四会市鸿明贵金属有限公司 | Smelting and separating method of noble lead |
| CN105063363B (en) * | 2015-08-31 | 2017-09-15 | 云南驰宏锌锗股份有限公司 | The method and apparatus that a kind of earth of positive pole prepares thick silver alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4451290A (en) * | 1981-09-16 | 1984-05-29 | Matthey Rustenburg Refiners (Proprietary) Limited | Recovery of platinum group metals from scrap and residues |
| CN1077498A (en) * | 1992-04-15 | 1993-10-20 | 沈阳冶炼厂 | A kind of technological process for the treatment of antimony rich lead with fire |
| CN1270235A (en) * | 2000-04-21 | 2000-10-18 | 沈阳冶炼厂 | Process for treating low-grade anode mud |
| CN1396962A (en) * | 2000-01-28 | 2003-02-12 | 尤密考公司 | Process for refining silver bullion with gold separation |
-
2006
- 2006-04-11 CN CNB200610034954XA patent/CN100441709C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4451290A (en) * | 1981-09-16 | 1984-05-29 | Matthey Rustenburg Refiners (Proprietary) Limited | Recovery of platinum group metals from scrap and residues |
| CN1077498A (en) * | 1992-04-15 | 1993-10-20 | 沈阳冶炼厂 | A kind of technological process for the treatment of antimony rich lead with fire |
| CN1396962A (en) * | 2000-01-28 | 2003-02-12 | 尤密考公司 | Process for refining silver bullion with gold separation |
| CN1270235A (en) * | 2000-04-21 | 2000-10-18 | 沈阳冶炼厂 | Process for treating low-grade anode mud |
Non-Patent Citations (2)
| Title |
|---|
| 从阳极泥提取金银合金的熔炼-精炼过程研究. 有色冶炼，第1996卷第2期. 1996 |
| 从阳极泥提取金银合金的熔炼-精炼过程研究. 有色冶炼，第1996卷第2期. 1996 * |
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| CN101054627A (en) | 2007-10-17 |
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