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

AI Technical Summary

Problems solved by technology

At present, the comprehensive treatment method for waste refractory bricks is basically to select refractory bricks

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

Experimental program
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Example Embodiment

[0031] Example 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, and 6.00% bismuth, and the rest are basically magnesium, chromium, iron, aluminum, calcium, silicon, etc. 的oxide.

[0033] Crush the discarded refractory bricks to below 3mm, mix and sample, take 500g of the test sample and wet-grind it with a ball mill for 5 minutes to make the fineness below 0.074mm, the particles account for 65%, the grinding concentration is 66.7%, repeat grinding Eight times, the sample was mixed to make it reach 4000g, and the sample was mixed to perform a shaker reselection experiment. After the sample undergoes a shaker test, three products of refined, medium and tail can be obtained. In order to improve the recovery rate of the shaker operation, China Minerals products are subjected to a shaker operation again, and the obtained concentrate i...

Example Embodiment

[0049] Example 2:

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

[0051] Crush the discarded refractory bricks to below 3mm, mix and sample, take 500g of the test sample and wet-grind it with a ball mill for 5min, so that the fineness is below 0.074mm, the particles account for 68%, and the grinding concentration is 66.7%. Repeat grinding 8 times, the sample was mixed to reach 4000g, and the sample was mixed to perform a shaker reselection experiment. After the sample undergoes a shaker test, three products of refined, medium and tail can be obtained. In order to improve the recovery rate of the shaker operation, China Minerals products are subjected to a shaker operation again, and the obtained concentrate is mixed with a shaker concentrate as a shaker...

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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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