Method for recycling manganese in waste slag of electric furnace smelted manganese-silicon and manganese iron
A technology of manganese-silicon alloy and manganese-ferroalloy, which is applied in the field of manganese recovery from manganese-silicon alloy and manganese-ferroalloy waste slag from electric furnace smelting, and can solve the problems of land occupation, pollution, manganese discarding, etc.
Inactive Publication Date: 2010-06-09
韦笃文
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Problems solved by technology
During the smelting process, in addition to obtaining alloy products, a considerable amount of slag is discharged at the same time. These slags generally contain 15-20% manganese, but most manufacturers do not recover the manganese in the slag due to various reasons. The slag is transported to landfill with the slag; the slag landfill not only occupies the land and causes pollution, but also the manganese in the slag is discarded, which is a great waste of resources
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[0008] The method for recovering manganese from manganese-silicon alloy and manganese-ferroalloy waste slag in electric furnace smelting in the present invention basically belongs to gravity beneficiation method, and the washing and beneficiation equipment used is mainly a shaking table. figure 1 The shaker is a top view. The following combination figure 1 Illustrate working principle of the present invention: after the waste slag particle that diameter is 3mm enters the bed surface of shaking table from feed port 5 above shaking table 4, when being subjected to the shaking of shaking table and moves forward, be subjected to the water overflowed by water tank 6 The water 7 is cleaned and pushed to the bottom of the water flow, and the waste slag particles are gradually classified during the moving process: a considerable proportion of the manganese fine slag with a large proportion flows out from the fine slag area 1 near the water tank 6, and other part of the waste slag part...
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Abstract
The invention relates to a method for recycling manganese from waste slag of manganese-silicon and ferromanganese in an electric furnace. The waste slag of the manganese-silicon and the ferromanganesein the electric furnace is crushed into granules (the diameter of which is less than 3mm) to form slag slurry; the slag slurry is screened out in a grading manner by using a shaking table according to different specific density; the waste slag granules with the maximum specific density are fine manganese slag; the waste slag granules, the specific density of which is less than that of the fine manganese slag, are intermediate slag; the intermediate slag is processed through recrushing and repeated vanning to select the fine manganese slag further; the waste slag granules with the minimum specific density are tailings which are thrown away. The manganese can be recycled from the waste slag by using the method, wherein, the manganese content of the waste slag is more than 10 percent.
Description
technical field [0001] The invention belongs to a method for recovering manganese in waste slag of manganese-silicon alloy and ferromanganese alloy smelted in an electric furnace. Background technique [0002] At present, manganese-silicon alloy and manganese-ferroalloy are basically produced by smelting in an electric furnace, and the raw fuel manganese ore, quartz stone, limestone, coke, etc. are added into the furnace according to the proportion of ingredients and smelted by electricity. During the smelting process, in addition to obtaining alloy products, a considerable amount of slag is discharged at the same time. These slags generally contain 15-20% manganese, but most manufacturers do not recover the manganese in the slag due to various reasons. The slag is transported to landfill with the slag; the slag landfill not only occupies the land and causes pollution, but also the manganese in the slag is discarded, which is a great waste of resources. Contents of the inv...
Claims
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IPC IPC(8): C22B47/00B03B5/04
CPCY02P10/20
Inventor 韦笃文
Owner 韦笃文