Method for treating enrichment set in poor pin and extracting tin and other color metals

A technology for non-ferrous metals and valuable metals, which is used in the field of processing tin-poor ore enrichment and extraction of tin and other non-ferrous metals, which can solve the problems of complex ore properties and reduced ore beneficiation recovery rate, etc., to strengthen the chlorination process and reduce equipment. Processing load, effect of increasing content

Inactive Publication Date: 2011-05-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The refractory ores are increasing, especially the ore properties of primary ore deposits are complex, and the minerals are mostly fine-grained, which makes the recovery rate of ore dressing continue to decline

Method used

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  • Method for treating enrichment set in poor pin and extracting tin and other color metals

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The tin-poor medium ore is processed and passed through a 60-mesh sieve; the ore content is 7-8% CaCl 2 , 3 ~ 4% pulverized coal, pelletizing; preheat to 700 ~ 750 ℃. The hot material enters the rotary kiln for mixing and chlorination roasting; pulverized coal is used as fuel and oxygen-enriched (preheated to 800°C) to support combustion; the chlorination roasting temperature is 1000-1050°C and the time is 40-50 minutes; the CO in the furnace gas is controlled / CO 2 It is 0.8~1.0; the flue gas is cooled, settled and wet dust collected to recover valuable metals.

[0059] The volatilization rate (%) of each valuable element is: Sn 96.2; Pb 98.4; Zn 71.6; the capture recovery rate (%) of each valuable element is: Sn 91.9; Pb 93.4; Zn 68.1.

Embodiment 2

[0061] The tin-poor medium ore has been processed and passed through a 60-mesh sieve; the amount of ore added is 4-5% CaCl 2 , 4-5% pulverized coal, pelletizing; preheat to 600-650°C. The hot material enters the rotary kiln for mixing and chlorination roasting; pulverized coal is used as fuel and oxygen-enriched (preheated to 800°C) to support combustion; the chlorination roasting temperature is 800-850°C, and the time is 90-100min; the CO in the furnace gas is controlled / CO 2 1.0 to 1.2; the flue gas is cooled, settled and wet dust collected to recover valuable metals.

[0062] The volatilization rate (%) of each valuable element is: Sn 93.4; Pb 95.7; Zn 70.3; the capture recovery rate (%) of each valuable element is: Sn 89.5; Pb 90.4; Zn 66.7.

Embodiment 3

[0064] The tin-poor medium ore has been processed and passed through a 60-mesh sieve; the amount of ore added is 5-6% CaCl 2 , 4-5% pulverized coal, pelletizing; preheat to 650-700°C. The hot material enters the rotary kiln for mixing and chlorination roasting; pulverized coal is used as fuel and oxygen-enriched (preheated to 800°C) to support combustion; the chlorination roasting temperature is 900-950°C, and the time is 70-80 minutes; the CO in the furnace gas is controlled / CO 2 It is ~1.0; the flue gas is cooled, settled and wet dust collected to recover valuable metals.

[0065] The volatilization rate (%) of each valuable element is: Sn 94.9; Pb 97.1; Zn 70.8; the capture recovery rate (%) of each valuable element is: Sn 91.1; Pb 92.7; Zn 67.4.

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Abstract

The invention relates to a method for treating an enrichment set in poor pin and extracting tin and other color metals. The method comprises the following steps of: drying and treating mineral aggregate; proportioning, mixing and pelletizing; adding a chlorinating agent and a reducing agent to the treated mineral powder in the poor tin and uniformly mixing; pelletizing; adding chlorinating agent 4-8 percent by weight of the powder and reducing agent which is 3-5 percent by weight of the powder; preheating and heating mineral aggregate pellets, heating the mixed mineral aggregate pellets in a preheated heater to rise the temperature within the limit that the collected heat of the mineral aggregate pellets is ensured to avoid causing a chemical reaction; chlorinating; volatilizing, roasting and putting the obtained hot mineral aggregate pellets in a chlorinated reactor for carrying out a chlorinating, volatilizing and roasting reaction of valuable metals at a roasting temperature of 800-1100 DEG C for a roasting time of 40-100 min; trapping and recovering valuable metal chloride; collecting and removing the mineral smoke generated in the volatilizing, roasting and putting step, cooling, trapping in a wetting mode and recovering the valuable metal chloride; circularly absorbing trapping liquid and improving the valuable metal content in a solution; and cooling the hot roasted pellets.

Description

technical field [0001] The present invention relates to a method for enriching tin from tin-depleted ores. Background technique [0002] With the continuous mining of tin deposits, the grade of tin ore continues to decline. The refractory ores are increasing continuously, especially the ore properties of the primary deposits are complex, and the minerals are mostly fine-grained, which makes the beneficiation recovery rate continue to decline. In order to ensure the sustainable development of the tin industry, we must vigorously improve the utilization rate of tin resources and develop tin resources. In order to improve the beneficiation recovery rate of refractory tin ore, it is necessary to reduce the beneficiation enrichment ratio, reduce the tin grade of the concentrate, and at the same time produce lean tin ore; Comprehensive beneficiation, enrichment and recovery of tin. [0003] my country's tin industry plays an important role in the global tin industry. my countr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/08C22B25/00C22B13/00C22B19/00
CPCY02P10/20
Inventor 胡启阳李新海王志兴郭华军彭文杰张云河刘久清
Owner CENT SOUTH UNIV
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