Oxygen-enriched side-blowing smelting method of impurity-poor high-silicon copper concentrate

Abstract

The oxygen-enriched side blowing smelting method of a kind of impurity-poor high-silicon copper concentrate of the present invention is as follows: take impurity-poor high-silicon low-copper copper concentrate 10-64% and impurity-poor high-silicon low-sulfur copper concentrate ≤ 44%, Add copper-rich high-sulfur ore 29‑42% and slag concentrate 4‑10% to it, mix evenly to obtain composite ore, and add 2.15‑4.5% CaO to the composite ore, add it to the side blowing furnace, and add the composite ore quality 3.6-6.8% fuel is smelted, the melting temperature is 1250-1290°C, during the smelting process, oxygen-enriched air with a concentration of 72-84% is continuously blown into the side blowing furnace, and the injection flow rate is 17000-23000Nm 3 / h, to obtain matte liquid and copper smelting slag. This method fully solves the problem of insufficient supply and quality of domestic copper concentrate. Using high-silicon ore as the ingredient skeleton, by adjusting the ratio, combined with measures such as optimizing the side-blowing smelting slag type, increasing the oxygen-enriched concentration, and improving the bed capacity, it can achieve Achieved a breakthrough of zero flux rate, and optimized the comprehensive matte grade and slag copper content data.

Description

Technical field: [0001] The invention belongs to the technical field of metal smelting, and in particular relates to an oxygen-enriched side blowing smelting method of impurity-poor high-silicon copper concentrate. Background technique: [0002] Matte smelting is the first process of pyrometallurgy, and its process can be divided into traditional smelting and enhanced smelting. Due to the low thermal efficiency and flue gas SO in the traditional smelting process 2 The shortcomings of low concentration and serious environmental pollution have been gradually replaced by enhanced smelting processes with high efficiency, energy saving and low pollution. The enhanced smelting process can be divided into flash smelting and molten pool smelting. The reaction principles of the two are similar, both are to oxidize copper concentrate into copper matte through oxygen-enriched air, and oxidize the gangue components in the concentrate, most of the iron and some impurities to form slag,...

AI Technical Summary

Problems solved by technology

The impurity-poor high-silicon copper concentrate has the greatest impact on the side-blowing furnace in the whole process. When the impurity-poor high-silicon copper concentrate enters the furnace and the silicon content is higher than the design requirement, the furnace condition fluctuates frequently, the copper content in the smelting slag and the fuel cost increase. Severe nodules in the furnace and flue

As a result, it brings great difficulties to the smelting of difficult-to-smelt copper concentrates with complex components. Due to the increase in the amount of high-silicon and impurity-poor copper concentrates in the smelting system, a series of problems such as a decrease in operating rate and an increase in smelting costs are urgently needed. solve

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