National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Citrate-Process Pilot-Plant Operation at the Bunker Hill Company.

PB80122708

Publication Date	1979
Personal Author	Crocker, L.; Martin, D. A.; Nissen, W. I.
Page Count	88
Abstract	A goal of the Federal Bureau of Mines is to minimize the undesirable environmental conflicts and impacts associated with mineral processing operations. To help reach this goal, the Bureau operated a citrate-process pilot plant for the removal of sulfur dioxide from lead smelter sintering machine waste gases to test the process. The process uses a carboxylate solution such as citric acid to absorb sulfur dioxide from waste gases. The operation demonstrated that (1) 99 pct of the sulfur dioxide could be removed from lead smelter sintering machining waste gases containing from 0.1 to 0.6 vol-pct sulfur dioxide, (2) sulfur precipitation and solution regeneration with hydrogen sulfide in conventional stirred vessels was readily controlled, (3) precipitated sulfur could be continuously recovered as a 99.5-pct-pure product by flotation and melting, and (4) 78 dry-vol-pct hydrogen sulfide gas could be produced from pilot-plant product sulfur, natural gas, and steam.
Keywords	Air pollution control Sulfur dioxide Pilot plants Metal industry Industrial wastes Combustion products Absorption Precipitation(Chemistry) Sulfur Lead(Metal) Smelters Citrate process Lead smelters
Source Agency	Bureau of Mines
NTIS Subject Category	68A - Air Pollution & Control 48A - Mineral Industries
Corporate Authors	Bureau of Mines, Salt Lake City, UT. Salt Lake City Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	198009

Citrate-Process Pilot-Plant Operation at the Bunker Hill Company.

Citrate-Process Pilot-Plant Operation at the Bunker Hill Company.
PB80122708

Publication Date	1979
Personal Author	Crocker, L.; Martin, D. A.; Nissen, W. I.
Page Count	88
Abstract	A goal of the Federal Bureau of Mines is to minimize the undesirable environmental conflicts and impacts associated with mineral processing operations. To help reach this goal, the Bureau operated a citrate-process pilot plant for the removal of sulfur dioxide from lead smelter sintering machine waste gases to test the process. The process uses a carboxylate solution such as citric acid to absorb sulfur dioxide from waste gases. The operation demonstrated that (1) 99 pct of the sulfur dioxide could be removed from lead smelter sintering machining waste gases containing from 0.1 to 0.6 vol-pct sulfur dioxide, (2) sulfur precipitation and solution regeneration with hydrogen sulfide in conventional stirred vessels was readily controlled, (3) precipitated sulfur could be continuously recovered as a 99.5-pct-pure product by flotation and melting, and (4) 78 dry-vol-pct hydrogen sulfide gas could be produced from pilot-plant product sulfur, natural gas, and steam.
Keywords	Air pollution control Sulfur dioxide Pilot plants Metal industry Industrial wastes Combustion products Absorption Precipitation(Chemistry) Sulfur Lead(Metal) Smelters Citrate process Lead smelters
Source Agency	Bureau of Mines
NTIS Subject Category	68A - Air Pollution & Control 48A - Mineral Industries
Corporate Authors	Bureau of Mines, Salt Lake City, UT. Salt Lake City Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	198009