Preparation method of activated carbon sequestration material for producing recycled aggregate

Abstract

The invention relates to a preparation method of an activated carbon sequestration material for producing recycled aggregate, which comprises the following steps: adding steel slag into a grinding aid, crushing, and then carrying out magnetic separation to recover steel; an activating agent is added into the treated steel slag for activation, and activated steel slag is obtained; adding slag into the activated steel slag, uniformly stirring, and adding a masking agent to obtain a mixed solution; filtering and air-drying the mixed solution to obtain an activated carbon sequestration material; and granulating and carbonizing the activated carbon sequestration material in a granulation reaction container to obtain the recycled aggregate. According to the method, alkaline earth metal and other ions in the converter steelmaking slag and the furnace slag are leached and purified, so that a carbonized product with a high additional value is obtained, effective solidification of carbon dioxide is achieved, damage to the environment caused by exploiting gravel aggregate is avoided, and greenhouse gas emission of fossil fuel in a power plant, a cement plant or a steel and iron manufacturing plant and the like can be reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a preparation method of an activated carbon-fixing material for producing recycled aggregates. Background technique [0002] The industrial sector, which occupies a significant proportion of energy consumption and has high carbon emissions, has become a key area of ​​energy conservation and emission reduction. The typical feature of the steel production process is the production of a large amount of solid residues. These steel slags are rich in silicates. Minerals, available with CO 2 The reaction forms stable carbonate minerals, which are excellent raw materials for sequestering CO2 and making building materials. [0003] Low-cost technologies to produce valuable secondary products are scarce due to the variability of slag material properties and the lack of proper management and utilization of industrial by-products. For use in construct...

AI Technical Summary

Problems solved by technology

However, these binders, especially cement, require high temperatures during the calcination process, consume a lot of energy, have high costs, and emit a large amount of carbon dioxide at the same time. Therefore, from an environmental and economic point of view, traditional cement granulation still has certain problems.

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