Technology and apparatus for removing lead, zinc, arsenic, antimony, bismuth and tin from matte

Abstract

The invention discloses a technology for removing lead, zinc, arsenic, antimony, bismuth and tin from matte. According to the technology, lead, zinc, arsenic, antimony, bismuth and tin are evaporated in a metallic state or a sulfide state by utilizing the effect of high temperature and vacuum, so that purified matte and lead-zinc multi-component alloy are obtained. The invention also discloses an apparatus for removing lead, zinc, arsenic, antimony, bismuth and tin from matte. The apparatus comprises a matte pool or a copper matte bag, a vacuum chamber, a vacuum chamber elevating system, a gas condenser, a cloth-bag deduster and a vacuum system; the vacuum chamber is disposed above the matte pool or the copper matte bag; the bottom of the vacuum chamber is provided with an ascension pipe and a descent pipe; the vacuum elevating system, which is used to raise or lower the vacuum chamber, is connected with the vacuum chamber; and the vacuum system, the cloth-bag deduster, the gas condenser and the vacuum chamber are communicated successively. The provided technology and the apparatus are convenient to operate, safe and controllable, and easily applicable to industrialization; and the obtained lead-zinc multi-component alloy is recoverable for sale, and the economical benefit is substantial.

Description

technical field [0001] The invention relates to a process and a device for removing lead, zinc, arsenic, antimony, bismuth and tin from matte copper, belonging to the technical field of nonferrous metal pyrometallurgy. Background technique [0002] Extracting copper from copper sulfide ore usually adopts the method of pyrometallurgy. The general process is: copper sulfide ore→mining process→copper concentrate→smelting process→matte→blowing process→crude copper→anode furnace process→anode copper →Electrolysis process→High-purity cathode copper. In the smelting-blowing process, the specific processes and equipment used by each copper smelting enterprise are not the same, which can be roughly divided into two categories. Mat furnace, etc., one type is smelting furnace plus converter blowing, in which the smelting furnace can be flash furnace, Isa furnace, Osmelt furnace, Noranda furnace, silver furnace, bottom blowing furnace, closed blast furnace, The reverberatory furnace i...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the increase in the content of impurity elements such as lead and zinc in the smelting slag and blowing slag, the viscosity of the slag increases and it is difficult to discharge the slag;

[0005] 2. Part of the impurity elements volatilize into the soot, resulting in the increase of the viscosity of the soot, and the molten soot forms nodules on the side wall of the sedimentation tank, the ascending flue, the connection between the ascending flue and the waste heat boiler;

[0007] 4. The content of lead, zinc, bismuth, tin and other impurities on the mineral anode plate exceeds the standard, seriously affecting the normal production of the electrolysis workshop, prone to high cell voltage, large-area anode passivation, more floating anode slime in the electrolyte, and cathode copper plates There are many problems such as long particles, especially at high current density (300~450A / m 2 ), these problems have a magnification effect and will become more serious

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