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Oxygen-enriched roasting method of high-copper low-sulfur copper sulfide concentrate and cathode copper

A technology of oxygen-enriched roasting and copper sulfide, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of low conversion rate of acid production and low copper leaching rate, and achieve high comprehensive recovery rate and high recovery rate , the effect of simple operation

Pending Publication Date: 2022-05-10
华刚矿业股份有限公司
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Problems solved by technology

[0004] The invention provides an oxygen-enriched roasting method for high-copper and low-sulfur copper sulfide concentrate to solve the technical problems of low copper leaching rate and low acid conversion rate when processing high-copper and low-sulfur copper sulfide concentrate

Method used

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  • Oxygen-enriched roasting method of high-copper low-sulfur copper sulfide concentrate and cathode copper

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Embodiment 1

[0050] S1. Prepare copper sulfide dry concentrate (moisture content < 10%) containing 61.88% copper, 0.85% iron and 14.73% sulfur with a certain amount of water in a slurry tank, and stir for 6 hours to make pulp. The mass concentration is 76%;

[0051] S2. Atomize the ore pulp through the atomizer, and then spray it into the roasting furnace. The dry weight input is 11.5t / h, and spray sulfur into the roasting furnace. The injection volume is 1022.3kg / h, and the mixed gas of oxygen and air is introduced into the air chamber of the boiling roaster. The oxygen content concentration of the mixed gas is 32%, and the flow rate of the mixed gas is 18400 m 3 / h, the temperature of oxygen-enriched roasting is 754℃~758℃, and the furnace bottom pressure is 18.4kpa, and oxygen-enriched roasting is carried out to obtain flue gas and hot calcining;

[0052] S3. Pass the flue gas obtained in step S2 through the waste heat boiler (the outlet temperature is 390°C), the cyclone dust collector...

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Abstract

The invention discloses an oxygen-enriched roasting method for high-copper and low-sulfur copper sulfide concentrate, which comprises the following steps of: mixing the high-copper and low-sulfur copper sulfide concentrate into pulp; the ore pulp is atomized and then sprayed into a roasting furnace, sulfur is added into the roasting furnace, mixed gas is introduced into the roasting furnace, oxygen-enriched roasting is conducted, and first flue gas and hot roasted sand are obtained; the first flue gas passes through a waste heat boiler, a cyclone dust collector and an electric dust collector in sequence for cooling and dust collection of the first flue gas, and second flue gas and smoke dust are obtained; the flue gas II sequentially passes through an efficient washer, a gas cooling tower and an electric demister in a purification system for dust removal and cooling, water supplemented by the purification system is used for absorbing SO3 in the flue gas II to generate a dilute acid solution, and qualified flue gas passing through the purification system enters an acid making system to prepare a concentrated sulfuric acid product; and the hot roasted sand, the smoke dust, the dilute acid solution and the copper electrodeposition barren solution are subjected to water quenching leaching, copper-containing leaching liquid obtained after water quenching leaching is subjected to direct electrodeposition, and cathode copper is prepared.

Description

technical field [0001] The invention relates to the field of non-ferrous metal smelting, in particular, to an oxygen-enriched roasting method of copper sulfide concentrate with high copper and low sulfur. In addition, the present invention also relates to a cathode copper obtained by an oxygen-enriched roasting method comprising the above-mentioned high-copper and low-sulfur copper sulfide concentrate. Background technique [0002] Copper is one of the earliest metals discovered and used by human beings, and it is an indispensable base metal in the development of the national economy. Copper has many valuable physical and chemical properties, is an excellent conductor of electricity and heat, and is used in all aspects of life and production. In 2002, my country surpassed the United States to become the largest copper consumer in the world, but the share of copper resources reserves is low, resource endowment is poor, and foreign dependence is high. Central and southern Af...

Claims

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Application Information

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IPC IPC(8): C22B15/00C25C1/12C01B17/74
CPCC22B15/0017C01B17/74C25C1/12
Inventor 周克荣林荣跃赵富城范海宝曾培季尚军
Owner 华刚矿业股份有限公司
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