Side-blown furnace reduction smelting technology for lead anode mud
A technology of lead anode slime and side-blowing furnace, applied in the direction of improving process efficiency, etc., can solve the problems of shortening operation time, pollution of arsenic and lead fume, difficulty in recycling, etc., and achieves reduced investment, reduced production cost, and comprehensive recycling efficiency Improved effect
Inactive Publication Date: 2013-08-28
CHENZHOU YUTENG CHEM IND
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Problems solved by technology
[0005] The above-mentioned invention applies the oxygen bottom blowing furnace to the reduction smelting and oxidation refining of precious lead, realizes the continuous molten pool smelting of lead anode slime, strengthens the smelting process, shortens the operation time, and improves the direct recovery rate of gold and silver, but the arsenic, lead The pollution problem of smoke and dust has not yet been solved, and the comprehensive recovery of valuable elements such as copper, antimony, bismuth, and tellurium is also difficult
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[0027] The technical solution provided by the present invention will be explained in detail below in conjunction with the examples, but it is not intended to limit the protection scope of the claims of the present invention.
[0028] In the following examples, the raw material used is lead anode slime, and its main components in terms of total mass percentage are as follows:
[0029] Pb: 14.87%; Cu: 0.45%; Sb: 36.3%; As: 6.71%; Bi: 11.68%; Te: 0.18%; Ag: 32845g / t;
[0030] Such as figure 1As shown, after the lead concentrate is batched, it is sent to the side-blowing furnace for smelting to produce noble lead, side-blowing slag and flue gas. Converting produces precious lead in bottom water and arsenic-antimony fumes. The precious lead in bottom water enters the silver-separating converter for smelting, producing slag in the early stage, slag in the later stage, coarse silver and soot. The smelting system carries out bismuth smelting. Crude silver enters the silver electroly...
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The invention relates to a side-blown furnace reduction smelting technology for lead anode mud. The technology comprises the following steps: (1) the lead anode mud, return materials and nut coke are grabbed into a proportioning bin in proportion by using a grab-bucket traveling crane, are uniformly mixed, then are grabbed in a metering material bin by using the grab-bucket traveling crane and continuously enter an oxygen-enriched side-blown smelting furnace after the proportioned materials are metered by an electronic belt balance and are granulated by a drum granulator; (2) the proportioned materials continuously enter the oxygen-enriched side-blown smelting furnace after the proportioned materials are granulated, natural gas and oxygen are blown into the furnace, and the materials are simultaneously subjected to oxidation-reduction reactions in the furnace; (3) noble-metal lead enters an antimony separation furnace through a chute so as to be volatilized and refined; (4) bottom-water noble-metal lead produced by the antimony separation furnace enters a refining furnace through a chute so as to be refined; and (5) electrolytic silver and gold refining is carried out so as to produce silver and gold ingot products with the grade being higher than 99.99%.
Description
technical field [0001] The invention relates to a non-ferrous metal smelting method, in particular to a side-blown furnace reduction smelting technology for lead anode slime. Background technique [0002] Lead anode slime contains a large amount of precious metals and rare elements, and is an important raw material for extracting gold and silver. The main purpose of smelting lead anode slime is to recover precious metal silver and gold, and by-products such as bismuth, antimony, copper, lead, tellurium and other rare metals . [0003] The pyroprocessing process of lead anode slime has been practiced for a long time, the equipment and operating conditions have been continuously improved, the production is stable, and the process is mature. However, the process still has disadvantages such as poor raw material adaptability, long production cycle, low gold and silver direct recovery rate, high slag return, high energy consumption, and large environmental pollution. [0004] P...
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Login to View More IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 谢志刚杨华锋谢志强朱明曹勇李兴科李初立杨建军范朝斌肖定荣周彪
Owner CHENZHOU YUTENG CHEM IND