A method for producing magnesium-silicon-calcium fertilizer by melting asbestos tailings in a submerged arc furnace
A technology of asbestos tailings and submerged arc furnace, which is applied in the direction of calcareous fertilizer, inorganic fertilizer, application, etc., can solve the problems of no fertilizer, no introduction of asbestos tailings removal technology, etc.
Active Publication Date: 2021-06-22
北京璞域环保科技有限公司
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[0008] From the above literature description, we can see that there is no introduction of the process of using asbestos tailings to produce fertilizers, nor the introduction of the process of removing heavy metals from asbestos tailings
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Embodiment Construction
[0044] The present invention is illustrated by taking the production of Ruoqiang holy land technology as an example.
[0045] 1) First, the asbestos tailings are mixed with graphite and put into the ball mill; the amount of carbon is 2.4% of the mineral amount, and the mass percentage is selected; the graphite with a carbon content of 85% is selected for carbon;
[0046] 2) The ball mill ball mills the material to 100 mesh and discharges;
[0047] 3) The above materials are pressed with dry pressing balls, and the size of the balls is between 30 and 100mm;
[0048] 4) Put the sphere into the submerged arc furnace for smelting through the feeding system, detect the CO between the concentration of the flue gas, keep the molten state for 30 minutes, and pour out the slag liquid in the furnace;
[0049] 5) After the slag liquid is slowly cooled, it enters the ball mill and grinds to 150 mesh. During the discharge process, the material first passes through a 0.4T magnetic separato...
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Abstract
The invention discloses a method for producing magnesium-silicon-calcium fertilizer by melting asbestos tailings in a submerged arc furnace. Firstly, the asbestos tailings are mixed with graphite and put into a ball mill; The amount of graphite is 85% with carbon; the ball mill grinds the material to 100 mesh and discharges; the above materials are briquetted with a dry-type briquette machine, and the size of the sphere is between 30 and 100mm; the sphere is added to the submerged arc furnace through the feeding system Smelting, keep the molten state for 30 minutes, pour out the slag liquid in the furnace; after the slag liquid is slowly cooled, enter the ball mill to grind to 150 mesh, and the material first passes through a 0.4T magnetic separator to select iron, cobalt, and nickel, and then the material passes through 150-mesh trommel sieve powder, the sieved material is used as special tailings for the selection of metal chromium; the sieved material of the trommel sieve is used as raw material for medium and trace element fertilizers, and can be directly applied to farmland as a powder, or can be granulated as Use of medium and trace element fertilizers.
Description
technical field [0001] The invention relates to a method for producing magnesium-silicon-calcium fertilizer by melting asbestos tailings in a submerged arc furnace. Background technique [0002] Asbestos is an important mineral raw material in the process of national economic construction. Asbestos is mostly produced in the serpentinite mineral belt, and every ton of asbestos produced produces 40 tons of tailings waste serpentinite. Asbestos tailings are rich in heavy metals such as Cr, nickel, cobalt, copper, iron, etc., which seriously harm the environment, animals and plants, and are typical hazardous wastes. They are originally produced in the Altun Mountains and Kunlun Mountains in Ruoqiang County, Xinjiang. Some components of asbestos tailings are described in the table below: [0003] [0004] According to the above table, serpentine is a hydrous silicate mineral of magnesium. Its chemical composition is 3MgO 2SiO 2 2H 2 O or MgO[Si 4 o 10 ](OH) 8 , The hea...
Claims
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IPC IPC(8): C05D3/04C21B13/00C22B1/24C22B23/02C22B34/32
CPCC05D3/04C21B13/006C22B1/2406C22B23/02C22B34/32
Inventor 慕湧慕心珵俞海明李秉勃吴汉元
Owner 北京璞域环保科技有限公司