Short-process high-recycling-rate smelting method for chalcocite

A technology with high recovery rate and smelting method, applied in crucible furnaces, electric furnaces, rotary drum furnaces, etc., can solve the problems of low copper recovery rate, high smelting cost, and long process, so as to improve copper recovery rate, reduce processing cost, Yield reduction effect

Inactive Publication Date: 2020-06-26
HENAN YUGUANG GOLD & LEAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high cost, long process and low copper recovery rate of existing chalcocite concentrate pyrometallurgy, the present invention provides a short-process and high recovery rate smelting method of chalcocite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Chalcocite assay composition: Cu: 62%, Fe: 2%, SiO 2 : 8%, S: 14%; copper matte assay composition Cu: 72%, Fe: 3%, S: 20%.

[0020] Add chalcocite to the silo equipped with a quantitative feeder first, and adjust the addition of chalcocite and copper matte to the converting furnace per hour according to the furnace temperature, oxygen ventilation rate, slag type and other parameters of the converting furnace quantity. In the present embodiment, the addition of chalcocite to the converting furnace is 8t per hour, and the addition of hot copper matte to the converting furnace is 14t per hour. In the present embodiment, Fe: SiO 2 is 0.91, no need to add slagging agent quartz ore; chalcocite is continuously and uniformly added to the converting furnace through the belt, and the copper matte is intermittently added to the converting furnace through the chute in the form of full heat from the copper matte mouth of the melting furnace For blowing. The mixed oxygen concentra...

Embodiment 2

[0022] Chalcocite assay composition: Cu: 50%, Fe: 1.8%, SiO 2 : 10%, S: 13%; copper matte assay composition Cu: 70%, Fe: 5%, S: 20.2%.

[0023] Add chalcocite to the silo equipped with a quantitative feeder first, and adjust the addition of chalcocite and copper matte to the converting furnace per hour according to the furnace temperature, oxygen ventilation rate, slag type and other parameters of the converting furnace quantity. In the present embodiment, the addition amount of chalcocite to the converting furnace is 6t per hour, and the addition amount of cold copper matte to the converting furnace is 19t per hour. In the present embodiment, Fe: SiO 2 is 3.09, exceeding the range of 0.8 to 1.2, so 0.5t of quartz stone is added to the converting furnace per hour; chalcocite is continuously and uniformly added to the converting furnace through a belt for blowing. All the added copper mattes are continuously fed into the converting furnace through a belt in a cold state. The...

Embodiment 3

[0025] Chalcocite assay composition: Cu: 40%, Fe: 1.5%, SiO 2 : 14%, S: 13%; copper matte assay composition Cu: 70%, Fe: 5%, S: 20.2%.

[0026] Add chalcocite to the silo equipped with a quantitative feeder first, and adjust the addition of chalcocite and copper matte to the converting furnace per hour according to the furnace temperature, oxygen ventilation rate, slag type and other parameters of the converting furnace quantity. In the present embodiment, the addition amount of chalcocite to the converting furnace is 7t per hour, and the addition amount of hot copper matte to the converting furnace is 20t per hour. In the present embodiment, Fe: SiO 2 It is 1.13, no need to add slagging agent quartz stone; chalcocite is continuously and uniformly added to the converting furnace through the belt, and copper matte is intermittently added to the converting furnace through the chute in the form of full heat from the copper matte mouth of the melting furnace For blowing. The mi...

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Abstract

The invention belongs to the field of nonferrous metal smelting, and particularly relates to a short-process high-recycling-rate smelting method for chalcocite. The short-process high-recycling-rate smelting method comprises the following steps that chalcocite and copper sulfonium are fed into a converting furnace with the oxygen concentration capable of being adjusted within a certain range to beconverted; crude copper generated by converting is sent to an anode furnace for fire refining, and converting slag generated by converting serves as a return material to be mixed into a smelting furnace to generate copper matte and smelting slag; the smelting slag is sent to a beneficiation workshop to be subjected to grinding and floating, and slag concentrate with high copper content and tailings with low copper content are selected; and the slag concentrate serving as a raw material is added into the smelting furnace to recycle copper metal, and the tailings serve as a raw material of a cement plant for recycling. The method is short in process and free of a smelting process, and the processing cost is reduced; and due to the fact that addition of a slag former is reduced and no high-sulfur and high-iron materials exist, the converting slag type is FeO-SiO2 after converting is finished, good fluidity is achieved, the yield of the converting slag is greatly reduced, and the copper recycling rate is increased and can reach 99% or above.

Description

technical field [0001] The invention belongs to the field of smelting of nonferrous metals, and in particular relates to a short-flow and high-recovery smelting method of chalcocite. Background technique [0002] Chalcocite concentrate contains more than 40% copper, less than 5% iron, 10-18% sulfur, and 5-20% silica. Due to the high grade of copper contained in chalcocite, the international conventional smelting process has There are two types of hydrometallurgy and pyrometallurgy. The hydrometallurgy technologies are mainly: one is bioheap leaching in Chile and the United States and pressure leaching in Australia to produce cathode copper; Wet leaching process for metal copper recovery. The above-mentioned bioheap leaching and pressure leaching hydrometallurgy have the problems of small production scale and low mechanization degree; the wet leaching process after roasting first has the problems of low copper recovery rate, long process, high investment and large power cons...

Claims

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Application Information

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IPC IPC(8): C22B15/00
CPCC22B15/0028C22B15/006
Inventor 曹军超赵体茂许向波黄晓丰
Owner HENAN YUGUANG GOLD & LEAD
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