The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2012
Filed:
Apr. 04, 2008
Philip Scott Arthur, The Gap, AU;
William John Errington, Samford, AU;
Philip Scott Arthur, The Gap, AU;
William John Errington, Samford, AU;
Yunnan Metallurgical Group, Kunming, Yunnan Province, CN;
Xstrata Technology Pty Ltd, Brisbane, Queensland, AU;
Abstract
A method for producing lead involves feeding lead concentrate, flux and solid fuel passing to a feed preparation unit. The prepared, mixed feed is then passed to a lead smelting furnace, such as an ISASMELT furnace or other top entry, submerged lance furnace. Air or oxygen, is injected into the molten charge in the ISASMELT furnace via the submerged lance. The feed mixture is converted into lead bullion and a lead-containing slag. The slag removed from the furnace is formed into lumps having a desirable size range. The slag lumps, together with coke and flux are fed into a blast furnace. In the blast furnace, the slag is converted into lead bullion and discard slag. The lead bullion removed may be subsequently fed to a lead refinery for further treatment.