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harris process lead refining

(PDF) Modified pyro-metallurgical technology for recovery of ...

Harris process is a well-known technology for purification of lead from alloying elements (impurities) antimony, tin and arsenic, this process use sodium nitrate as an oxidizing agent.

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Robin Harris, MBA, PMP - Global Refining Business Improvement ...

View Robin Harris, MBA, PMPS profile on LinkedIn, the world's largest professional community. Robin has 5 jobs listed on their profile. See the complete profile on LinkedIn and discover Robin ...

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Lead refining process for Ag and Bi removing-Industry news

Lead fire-refining process Harris process and Parkes process. Powben can provide the one stop solution for crude lead fire-refining and electro-refining process to produce 99.985-99.99% pure lead ingot. The lead composition of client is shown in the below table:

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Lead Recycling - ScienceDirect

Lead with an even higher purity can be obtained by electrolytic refining of impure lead anodes in fluorosilicic acid H 2 SiF 6 (Betts process). Although less used than pyrometallurgical refining, both primary and secondary lead producers produce refined lead using the Betts process, especially when the Bi level of the bullion is high ( Gonzalez ...

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New Pyrometallurgical Bullion Lead Refining Process

process was the only one that removed bismuth efficiently. A more recently developed electrolytic process, first used in the 1950s in Italy, employs a sulphamate electrolyte. This is claimed to be an equally efficient refining method with the advantage that the electrolyte is easier to prepare [4], [5]. Lead refining in secondary lead industry

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Trace Bohn - Process Lead - HollyFrontier Refining ...

Process Lead at HollyFrontier Refining & Marketing LLC. View profile View profile badges Get a job like Traces. Stack jobs in Bixby, OK. 34,018 open jobs. Loss Prevention jobs in Glenpool, OK ...

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Lead Bullion Fire-refining and Electrorefining Process-Lead-

The lead-refining process is described as, After copper drossing, generally Te, As, Sn and Sb are removed substantially by the Harris Refining Process using fused NaOH. A certain selectivity during refining is achieved by controlled addition of NaNO3. Another refining step is decopperizing by means of elemental sulfur.

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Process for refining lead bullion - Stannum Group LLC

The Harris process used slag composition manipulation during pyrometallurgical processing to selectively remove impure compounds and elements found in lead bullion. The Harris process provides an environment where lead impurities including antimony, arsenic, tin, tellurium, and selenium are oxidized out of the lead by mixing or otherwise contacting the molten lead bullion with mildly oxidizing slags consisting of alkali metal hydroxides and other salts.

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Monitoring of impurities in molten lead by e.m.f ...

E.m.f. measurements on the cell Pt, Fe, M(Pb)¦NaOH¦Cu2O, Cu, Pt (M=As, Sn, Sb) at 450°C have shown the feasibility of using this system for direct monitoring of the impurity content of molten lead during the Harris process of lead refining. The reference electrode/electrolyte system described can be used to achieve the selective separation of antimony from the other impurities, arsenic and ...

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12.11 Secondary Lead Processing - US EPA

Remelting process is usually applied to lead alloy ingots that require no further processing before casting. Kettle furnaces used for alloying, refining, and oxidizing are usually gas- or oil-fired, and have typical capacities of 23 to 136 megagrams (25 to 150 tons) per day. Refining and alloying operating temperatures range from

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Lead Refining by Electrolysis

A solution of lead-fluosilicate, containing an excess of fluosilicic acid, has been found to work very satisfactorily as an electrolyte for refining lead. It conducts the current well, is easily handled and stored, non-volatile and stable under electrolysis, may be made to contain a considerable amount of dissolved lead, and is easily prepared from inexpensive materials. It possesses, however ...

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12.11 Secondary Lead Processing - US EPA

Remelting process is usually applied to lead alloy ingots that require no further processing before casting. Kettle furnaces used for alloying, refining, and oxidizing are usually gas- or oil-fired, and have typical capacities of 23 to 136 megagrams (25 to 150 tons) per day. Refining and alloying operating temperatures range from

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(PDF) Control of lead refining process with the use of case ...

the considered lead refining process is to rem ove impurities of the input lead ore in order to obtain output m aterial of PB985 type. The c ontent of lead in the output m aterial should be at ...

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US20100132508A1 - Process for separating and refining ...

The Razor Process is a unique pyrometallurgical lead refining process. Benefits from the Razor process include: lower energy costs; improved working environment; reduced recycling costs; increased refining productivity; reduced cycle time and labor requirements; and production of secondary recyclable products, therefore yielding unique and immediate benefits.

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Refining of lead from lead battery recycling - STC Italy

The Harris process uses also some reagents as sodium hydroxide and sodium nitrate. Other elements can be removed during the lead refining process by adding other metals to the molten lead. For the removal of silver (Ag) through the Parkes process, for example, zinc is added at high temperatures. Silver has a high affinity for zinc forming intermetallic compounds.

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Lead Harris/Parkes Refining Dross Recovery-Lead-

Lead Harris/Parkes Refining Dross Recovery. Refining dross is the result of lead refining process where impurities like copper, tellurium, arsenic-antimony-tin, silver, zinc and bismuth in sequence from lead bullion. Composition of each type of dross varies and is subjected to specific refining steps and raw material contents. Conversely, lead refining process are taken in account for the convenience of refining dross recovery.

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Lead refining - messergroup.com

Process Description. The aim of lead refining is to produce sellable lead metal. This is done in a refining kettle by separating out unwanted accompanying elements and alloying. After copper has been separated out, arsenic, tin and antimony are removed from the lead melt. The resulting dross is recycled. Kettle for lead refining. Gas Application

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Lead Recycling - ScienceDirect

Lead with an even higher purity can be obtained by electrolytic refining of impure lead anodes in fluorosilicic acid H 2 SiF 6 (Betts process). Although less used than pyrometallurgical refining, both primary and secondary lead producers produce refined lead using the Betts process, especially when the Bi level of the bullion is high ( Gonzalez ...

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Secondary Lead Smelting - Trainex

Secondary Lead Smelting Objectives Describe the basic smelting process terms: smelting, refining, and alloying List key chemicals associated with secondary lead smelting Define volatility temperature, volatile metals, and metals partitioning

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Monitoring of impurities in molten lead by e.m.f ...

E.m.f. measurements on the cell Pt, Fe, M(Pb)¦NaOH¦Cu2O, Cu, Pt (M=As, Sn, Sb) at 450°C have shown the feasibility of using this system for direct monitoring of the impurity content of molten lead during the Harris process of lead refining. The reference electrode/electrolyte system described can be used to achieve the selective separation of antimony from the other impurities, arsenic and ...

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The University of Wisconsin Collection: The Wisconsin ...

The Harris process of lead refining, p. 239 Page 239. Top of Page Contents Section Page . This ...

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Lead Bullion Fire-refining and Electrorefining Process-Lead-

The lead-refining process is described as, After copper drossing, generally Te, As, Sn and Sb are removed substantially by the Harris Refining Process using fused NaOH. A certain selectivity during refining is achieved by controlled addition of NaNO3.

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