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Method of producing magnesium-silicon-calcium fertilizer from submerged arc furnace molten asbestos tailings

A technology of asbestos tailings and submerged arc furnace, applied in the direction of calcareous fertilizers, inorganic fertilizers, applications, etc., can solve the problems of no fertilizer, no introduction of asbestos tailings removal process methods, etc., and achieve the effect of eliminating environmental hazards

Active Publication Date: 2018-11-30
北京璞域环保科技有限公司
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AI Technical Summary

Problems solved by technology

[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

Method used

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  • Method of producing magnesium-silicon-calcium fertilizer from submerged arc furnace molten 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 of producing a magnesium-silicon-calcium fertilizer from submerged arc furnace molten asbestos tailings. The method includes: firstly adding asbestos tailings with graphite to a ball mill for ball-milling; controlling the carbon dosage at a mass percent of 2.4%; selecting graphite with a carbon content of 85% for carbon blending; conducting ball-milling on the materials to 100 meshes by the ball mill and then performing discharging; employing a dry ball press machine for ball pressing on the materials to a ball size of 30-100mm; adding the balls into a submerged arc furnace for smelting by a charging system, maintaining a molten state for 30min, and pouring the slag liquid out of the furnace; slowly cooling the slag liquid and then letting the cooled slag liquid enter the ball mill for levigating to 150 meshes, in the discharging process, firstly separating iron, cobalt and nickel by a 0.4T magnetic separator, then subjecting the material to powder sifting by a 150mesh drum screen, and adopting the oversize product as the special tailing for selection of metal chromium; and taking the undersize product as the raw material of medium and trace elementfertilizers, applying the undersize product as powder directly to farmland, or granulating the undersize product and then using the obtained granules as 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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Application Information

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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
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