Method for recovering valuable metals from waste refractories by virtue of reselection-kerosene aggregative flotation combined process

A waste refractory material and combined process technology, which is applied in the field of valuable metal recovery in waste refractory materials, can solve the problems of waste of resources, high energy consumption, complex process, etc., and achieve the effect of efficient recovery, avoidance of damage, and efficient recovery.

Active Publication Date: 2017-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the comprehensive treatment method for waste refractory bricks is basically to select refractory bricks with more metals immersed in them, wet leaching, and extract valuable metals by grade. partial waste of resources

Method used

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  • Method for recovering valuable metals from waste refractories by virtue of reselection-kerosene aggregative flotation combined process
  • Method for recovering valuable metals from waste refractories by virtue of reselection-kerosene aggregative flotation combined process
  • Method for recovering valuable metals from waste refractories by virtue of reselection-kerosene aggregative flotation combined process

Examples

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Effect test

Embodiment 1

[0032] The present invention takes silver converter refractory bricks from a lead smelter in Chenzhou, Hunan as the research object. The discarded refractory bricks contain 1.35% silver, 3.94% lead, 6.00% bismuth, and the rest are basically magnesium, chromium, iron, aluminum, calcium, silicon, etc. of oxides.

[0033] Crush the waste refractory bricks to less than 3mm, mix and sample, take 500g of test samples and wet grind them with a ball mill, grind for 5 minutes, so that the fineness reaches 0.074mm and the particles account for 65%, the grinding concentration is 66.7%, and repeat the grinding Eight times, mix the sample to make it reach 4000g, mix the sample and carry out the shaking table re-selection experiment. After the sample is subjected to a shaker test, three products of fine, middle and tail can be obtained. In order to improve the recovery rate of the shaker operation, the middle ore product is subjected to a shaker operation again, and the obtained concentrate...

Embodiment 2

[0050] The present invention takes lead converter refractory bricks from a lead smelting plant in Chenzhou, Hunan as the research object. The discarded refractory bricks contain 2054g / t of silver, 18.74% of lead, 1.52% of antimony, and 1.87% of copper, and the rest are basically magnesia oxides.

[0051] Crush the waste refractory bricks to less than 3mm, mix well, take samples, take 500g of test samples and wet-grind them with a ball mill, and grind them for 5 minutes, so that the fineness reaches 0.074mm and the particles account for 68%, and the grinding concentration is 66.7%, and repeat the grinding 8 times, mix the sample to make it reach 4000g, mix the sample and carry out the shaking table re-selection experiment. After a shaker test on the sample, three products of fine, medium and tail can be obtained. In order to improve the recovery rate of the shaker operation, the medium ore product is subjected to a shaker operation again, and the obtained concentrate is mixed wi...

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Abstract

The invention discloses a method for recovering valuable metals from waste refractories by virtue of a reselection-kerosene aggregative flotation combined process. The method comprises the following steps of crushing waste refractory original ores, performing primary wet-type ball milling, and then performing reselection by virtue of a two-stage table, thereby obtaining a table concentrate product; recovering coarse particle metals from the table concentrate, mixing table middlings with tailings, performing secondary wet-type ball milling, and performing floatation recovery by utilizing coal oil as an auxiliary collecting agent, xanthate and ethyl thio carbamate as collecting agents and terpineol as a blowing agent, so as to recover micro-fine particle metals. By virtue of reselecting and recovering coarse particle metals, and combining with floatation, collection of the micro-fine particle metals is strengthened, and finally efficient recovery of valuable metals in waste refractory bricks is realized. The method has relatively high economic value.

Description

technical field [0001] The invention relates to the field of recycling valuable metals in waste refractory materials, in particular to a method for recovering valuable metals in waste refractory materials through a combined gravity separation-kerosene agglomeration flotation process. [0002] technical background [0003] In the process of pyrometallurgical smelting of nonferrous metallurgy, SO 2 There is a lot of gas and a large amount of slag, which is easy to corrode the furnace lining. The metal melt has good fluidity and is easy to penetrate into the refractory material. Magnesia-chrome bricks have the characteristics of high temperature strength, excellent thermal shock resistance, and strong corrosion resistance to alkaline slag, making them the most commonly used refractory materials in the non-ferrous metal smelting industry. my country produces about 4 million tons of magnesia refractory bricks every year, and nearly 3 million tons of waste magnesia bricks are prod...

Claims

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Application Information

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IPC IPC(8): B02C21/00B02C23/14B03B9/06C22B15/00C22B7/00
CPCB02C21/00B02C23/14B03B9/061C22B7/005C22B15/00Y02P10/20Y02W30/52
Inventor 焦芬覃文庆薛凯刘维蔡练兵刘瑞增徐探王道委
Owner CENT SOUTH UNIV
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