Technology and device for preparing fumed silica from copper tailings as raw materials and recovering metals

Abstract

The invention provides a technology for preparing fumed silica from copper tailings as raw materials and recovering metals. The technology comprises that wastes such as copper tailings as raw materials, a fluorine-containing acid solution, hydrochloric acid and nitric acid undergo a reaction to produce a high added value fumed silica product and metals such as silver, gold, platinum, rhodium, nickel and molybdenum are recovered. The product has SiO2 content greater than 99.9%. A multi-point BET method proves that the product has a specific surface area greater than or equal to 350m<2>/g. The technology changes wastes into valuables. The acidic gas produced by the technology is absorbed by a negative pressure water absorption pot so that a corresponding acid solution is obtained and when the acid solution has a certain condensation, the acid solution can be recycled. The invention also provides a production device used by the technology. Parts used by the device are common devices in the chemical plant, has a low cost and realizes large scale industrial production.

Description

technical field [0001] The invention relates to a process method and a device for preparing gas-phase white carbon black from copper tailings and recovering metals, and belongs to the technical fields of chemical purification and environmental protection. Background technique [0002] According to Zhu Bingbing, Tian Jian, Zhu Yanchao, Tian Jin, and Shen Shengwei's "Current Situation and Prospect of Comprehensive Utilization of Copper Tailings": my country's copper mine resources have a long history of development and utilization, and copper tailings are widely used in tailings due to their huge quantity and scale. The field is relatively representative. Copper tailings resources are widely distributed in my country, and the average grade of copper in copper mine tailings is estimated to be no less than 0.077%. The occurrence state of copper in copper tailings resources is complex and diverse, the intercalation of copper is fine, the dissociation degree of copper is low, and ...

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Problems solved by technology

[0003] The invention provides a process and device for preparing gas phase white carbon black and recovering silver, gold, platinum, rhodium, nickel, molybdenum and other metals using copper tailings as raw material; it successfully avoids the present gas phase method for preparing white carbon The process of using hydrogen and oxygen and high-temperature hydrolysis in the black process also solves the problem that the current copper tailings cannot be efficiently utilized. This invention is also used in copper-nickel tailings, lead-zinc tailings, copper-molybdenum tailings, and silver mines Treatment of tailings and other non-ferrous metal tailings

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