A treatment process for copper smelting converter slag containing high-grade matte

Abstract

The invention discloses a high-grade matte-contained copper smelting converter slag treatment process. The process crushes and screens converter slag to feed in a drum type dry magnetic separator for magnetic separation; a white matte nonmagnetic material obtained by magnetic separation directly serves as a copper concentrate product for smelting; and a magnetic material is fed in an ore grinding classification flow consisting of a ball mill and classification equipment, and then is fed in a flotation flow. The process achieves early recovery of copper ores as far as possible to the greatest extent, reduces the material grinding quantity, reduces the flotation grade, improves the treatment capacity of dressing plants, saves the construction investment and the treatment cost of the converter slag, directly improves the enterprise benefit, and solves the development and the utilization of converter slag resources.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a copper smelting converter slag treatment process containing high-grade matte. Background technique [0002] Copper smelting converter slag is the waste slag produced by blowing operation in pyrometallurgy copper smelting, with a high copper content of 3% to 12%, and there are a large amount of precious metals symbiotic with copper metal in the slag. Therefore, converter slag is a high-grade secondary resources. There are two commonly used processing methods for recovering valuable metals from converter slag at home and abroad: the dilution electric furnace dilution method and the mineral processing method. Depleted electric furnace depletion, that is, returning the slag to the electric furnace and adding a reducing agent to the Fe in the copper slag 3 o 4 Carrying out the reduction and washing the reduced copper slag with low-grade matte, this method makes the harmful impurities in...

AI Technical Summary

Problems solved by technology

[0003] In these processes, the "magnetic separation" is set after the "grinding", that is, all materials have to go through the grinding operation before entering the sorting operation. Strong toughness, hard to crush and hard to grind. If all the materials enter the grinding operation, the entire grinding cost will be very high. According to production practice, the grinding cost accounts for nearly 60% of the beneficiation cost

At the same time, the flotation operation has a certain fineness requirement for the floating materials. Too large or too fine particles are not conducive to flotation recovery. Due to the high specificity of copper, if the coarse copper cannot be ground finely, it is difficult to adhere to the flotation foam. Can affect the recovery of copper

In addition, granular copper also increases the risk of sinking the flotation machine, which may cause equipment damage and affect the stability of the process.

Further, if the converter slag with high copper content enters the flotation process, the flotation process will be longer, construction investment will increase, and reagent consumption will increase.

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