Method and device for comprehensive utilization of copper tailing sludge and tailing obtained after copper smelting beneficiation

Abstract

The invention provides a method for comprehensive utilization of copper tailing sludge and tailing obtained after copper smelting beneficiation. The method comprises the steps that valuable metal in the sludge or the tailing obtained after copper smelting beneficiation in a dissolved mode with nitric acid with oxidizability, sulfur in sulfide minerals such as copper sulphide is oxidized into sulfuric acid, and nitrate is generated by other metal and left in acid liquor; filtering is conducted, filtrate is treated independently, and thus relevant metal such as silver, gold, platinum, rhodium, nickel and molybdenum are separated out; and then filter residues are prepared into a high-added-value product, namely fumed silica, the content of SiO2 in the prepared product is higher than 99.9%, the specific surface area measured through a multi-point BET method is 350-500 m<2> / g, and the effect of recycling waste is achieved. Meanwhile, the invention provides a production device for the method. Parts of the production device are all common parts in a chemical plant, cost is low, and large-scale industrial production can be achieved.

Description

technical field [0001] The invention relates to a process and a device for preparing gas-phase white carbon black and recovering heavy metals by using copper tailings and tailings after copper smelting and beneficiation, and belongs to the technical field of chemical purification and environmental protection. Background technique [0002] According to the article "Comprehensive Utilization of Copper Smelting Sludge of Daye Nonferrous Metals Company" by Wang Hukun, Li Ye, Zeng Xianglong, etc., the Datang sewage treatment project of Daye Nonferrous Metals Company was completed and put into operation in 1990, covering an area of ​​13772m 2 , designed to treat 24,000m of wastewater 3 / d, it mainly treats the three types of mixed wastewater discharged from the company's smelter plant, including acid wastewater, wastewater containing heavy metal ions and domestic sewage, and adopts a process flow of pre-sedimentation-neutralization-clarification-filtration-two-stage dosing. Since...

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Problems solved by technology

[0014] The invention provides a process and device for preparing fumed white carbon black and recovering heavy metals by using copper tailings and tailings after copper smelting and beneficiation as raw materials; it successfully avoids the use of The technological process of hydrogen, oxygen and high-temperature hydrolysis also solves the problem that the current copper tailings and tailings after copper smelting and beneficiation cannot be efficiently utilized. The present invention also provides gas-phase white carbon black products that can be produced under normal temperature and pressure. new technology and production equipment

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