A temperature-controlled blast furnace with multiple layers of tuyere and high coke column for arsenic removal of high antimony secondary fumes

Abstract

The invention provides a temperature-control blast furnace comprising a plurality layers of air vents and a high-coke column and used for arsenic removal of high-stibium secondary smoke dust. The blast furnace is provided with at least three layers of air vents; the distance between every two adjacent air vent layers is 0.4 m to 0.8 m; the height of the coke column in the air vent region is flushwith the height of the top end of the air vent region; in a smelting process, the air blowing intensity of each air vent layer is controlled so as to control the temperature of the coke column, so that alloy liquid drops gathered in a reductive smelting process of the high-stibium secondary smoke dust pass through coke clearance passages of the high-coke column; in a relatively-long-route-time andstrong-reduction environment, the alloy liquid drops continuously fall off and collide repeatedly, so that As in the alloy liquid drops is effectively reduced and volatilized, therefore the arsenic content in the produced stibium alloy is reduced to 1% level; the burthen of subsequent refining and arsenic removal of the stibium alloy is greatly alleviated; the direct yield of refined stibium is greatly increased; and the production cost of subsequent smelting is greatly lowered.

Description

technical field [0001] The invention relates to a blast furnace for nonferrous smelting, in particular to a temperature-controlled blast furnace with multi-layer tuyeres and high coke columns, which is specially used for arsenic removal of high-antimony secondary smoke. Background technique [0002] In the non-ferrous smelting industry, the blast furnace is an ancient, mature and applicable classic furnace type. There are different targeted structures for different furnace materials, but the basic structure of the blast furnace is the same, including the furnace hearth at the bottom, the furnace body, the charging port on the furnace top, the flue gas collecting hood, and the related water cooling system and air supply system. The furnace body further includes a tuyere area and a furnace body smelting area located above the tuyere area, and a coke column is arranged at the bottom of the tuyere area. Generally, the tuyere in the tuyere area is set on the first floor, and the...

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Problems solved by technology

[0003] The object of the present invention is to provide an improved high-antimony secondary fume temperature-controlled blast furnace with multiple layers of tuyeres and high coke columns for arsenic removal of high-antimony secondary fume, aiming at the problems existing in the traditional blast furnace in the prior art in smelting high-antimony secondary fume. , in order to solve the problems of high volatility of high-antimony secondary fumes in blast furnace smelting, low direct yield and high arsenic content in alloys

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