Carbon dioxide-based hydrometallurgical multistage reaction and separation system

Abstract

This application discloses a multi-stage reaction and separation system for hydrometallurgy based on carbon dioxide, including: a raw material pre-washing device, industrial waste or ore raw materials or tailings, reagents and water are continuously put into the raw material pre-washing device according to a certain ratio and fully mixed The reaction device, the slurry is continuously injected into the reaction device, the carbon dioxide is continuously injected into the reaction device, and the reacted slurry is continuously discharged; the multi-stage solid-liquid separation device performs multi-stage solid-liquid separation of the slurry, and the solid-liquid The separated unreacted solid particles are circulated to the expected pre-washing device; the third product preparation device, which contains the target calcium ions and magnesium ions in the clear liquid to prepare calcium and magnesium products; the recovery water circulation device, the recovered water is recycled to the system. The application can realize continuous reaction, realize the maximization of processing capacity, and also provide possibility for multi-stage circulation reaction, and also reduce the loss of carbon dioxide in the discharge process of batch reaction.

Description

technical field [0001] This application belongs to the fields of hydrometallurgy technology, carbon dioxide adsorption, utilization and sequestration (Carbon Capture, Utilization and Sequestration), and solid waste resource utilization, and specifically relates to a carbon dioxide-based hydrometallurgical multistage reaction and separation system. Background technique [0002] If the industrial waste or many ore raw materials or tailings generated during the operation of iron and steel manufacturing plants, power plants or electrolytic aluminum industries are not properly treated, used or utilized, their direct discharge will cause soil, water and air-related pollution and Other derived environmental issues. [0003] The invention patent with the publication number CN 106999947B discloses a method and system for recovering products from steel slag, which includes: a first source of iron slag or steel slag; a grinding module, which is configured to convert the iron slag or st...

AI Technical Summary

Problems solved by technology

The method and system for recovering products from steel slag disclosed in this patent is a batch reaction, a three-phase batch reaction of gas, liquid and solid, which will waste unnecessary time in repeated feeding and unloading cycles, The processing capacity per unit time of the entire system cannot be fully utilized

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