A method for extracting heavy metals from molten asbestos tailings

A technology for asbestos tailings and heavy metals, which is applied in chemical instruments and methods, process efficiency improvement, magnetic separation, etc. Treatment, the effect of improving breathability

Active Publication Date: 2020-02-04
新疆中合大正冶金科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen from the above literature description that there is no introduction of the process method for the extraction of asbestos tailings, nor the introduction of the process method for the removal of heavy metals in the asbestos tailings

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  • A method for extracting heavy metals from molten asbestos tailings

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Embodiment Construction

[0031] Embodiment of the present invention: use asbestos tailings in Ruoqiang County, Xinjiang as raw material.

[0032] A method for extracting heavy metals from molten asbestos tailings. The operation is carried out in accordance with the following steps: 1). Firstly, the asbestos tailings are crushed to less than 30mm, and after the asbestos is selected, the tailings are added to a submerged arc furnace with a transformer capacity of 35000KVA. 2) 50 tons of asbestos tailings are added to each furnace. After they are completely melted, the amount of reducing agent graphite carbon powder and limestone added are respectively 12% and 10% of the total weight of asbestos tailings. The graphite The carbon powder contains 90% carbon, and the calcium oxide content in the limestone is greater than 50%. After the color of the slag is transformed into white or yellowish white, the slag liquid in the furnace is poured out; 3) After the slag liquid is poured into the slag tank, the The J...

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Abstract

The invention discloses a method for extracting heavy metals from molten asbestos tailings. The method comprises the following steps: 1), firstly, crushing the asbestos tailings till 30mm or below, selecting asbestos therein, then adding the tailings into a submerged arc furnace, and electrifying for smelting; 2), adding 50 tons of the asbestos tailings into each furnace, adding a reducing agent graphite carbon powder and limestone according to the amounts of 12% and 10% of the total weight of the asbestos tailings respectively after completely melting, and after the color of furnace slag becomes white or yellowish white, pouring out slag liquid in the furnace; 3), pouring the slag liquid into a slag tank, treating the furnace slag by a Jiaheng granulating technology, discharging after granules are controlled to be about 70 meshes, firstly selecting iron, cobalt and nickel from a material by using a 0.4T magnetic separator in the discharging process, then sieving the material by usinga 150-mesh drum sieve, and selecting metal chromium by using an oversize material as special tailings; 4), utilizing the selected metal iron, nickel, chromium and cobalt as materials for smelting hardalloy and the like. By the method, wastes can be turned into treasures and the waste utilization rate can be increased.

Description

technical field [0001] The invention relates to a method for extracting heavy metals from molten asbestos tailings. 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. Because the asbestos tailings are rich in Cr, nickel, cobalt, copper, iron and other heavy metals, some of the asbestos tailings originating in the Altun Mountains and Kunlun Mountains in Ruoqiang County, Xinjiang are described in the following table: [0003] [0004] Consult literature (1) Luo Zhenyong and Liu Zhihong published the paper titled "Preparation and Application of Metal Cobalt Powder" in the second issue of "Powder Metallurgy Industry" in 2008. There is the following statement: "Cobalt powder has special physical properties. , chemical properties and mechanical properties, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B7/04C22B23/02C22B34/32B03C1/02
CPCB03C1/02C22B7/001C22B7/04C22B23/02C22B34/32Y02P10/20
Inventor 慕湧俞海明李秉勃吴汉元慕心珵
Owner 新疆中合大正冶金科技有限公司
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