Method for producing ecologically active slag by treating electrolytic manganese slag with tunnel kiln equipment

Abstract

The method for preparing ecologically active slag by treating electrolytic manganese slag with tunnel kiln equipment includes the following steps: (1) batching and homogenization: by weight, 45-75 parts of electrolytic manganese slag, 8-25 parts of stone coal, 14.7- 45.0 parts of waste rock slag and 0.3 to 2.0 parts of altering agent are mixed and ground to make powder, and 5 to 15 parts of water are added to mix and homogenize into plastic materials; (2) Molding: plastic materials are formed into rods or blocks Materials; (3) Tunnel kiln calcination: Send the shaped material into the tunnel kiln, calcine at 980-1300°C for 20-60 minutes, and quench to obtain ecologically active slag. The ecologically active slag obtained according to the method of the present invention contains various hydration active minerals, can be widely used in the cement industry, and has high strength during use. It is used as masonry cement or cement bricks, which is easy to pulp and has high strength; using the method of the present invention, Small investment, no waste water and waste residue, good economy.

Description

Technical field [0001] The invention relates to a method for preparing ecologically active slag from electrolytic manganese slag, in particular to a method for preparing ecologically active slag by treating electrolytic manganese slag with tunnel kiln equipment. Background technique [0002] my country is the world's largest manganese industry, and its pure manganese output accounts for more than 95% of the world's total. The waste slag discharged during the processing of the manganese industry is manganese slag, including "manganese slag" and "manganese slag." Manganese slag is a water-quenched blast furnace slag made from high-temperature slag discharged during the smelting process of ferromanganese alloy or silico-manganese alloy. The amount of manganese slag produced by one ton of ferromanganese alloy is 2 to 2.5 tons, and its activity is only Blast furnace slag is second to pig iron smelting, better than low calcium fly ash, and can be directly used as cement admixture or pr...

AI Technical Summary

Problems solved by technology

[0023] However, the above-mentioned technical scheme has problems such as poor economy, small consumption of electrolytic manganese slag or obvious secondary pollution, and objectively cannot solve the problem of resourceful treatment of electrolytic manganese slag

[0024] The above-mentioned existing technical approaches or technical methods on the management and comprehensive utilization of manganese slag have objectively obtained certain research results or application results, and the management of manganese slag has also been included in the national "863 Plan" subject And the results have been checked and accepted. However, so far, except that the manganese slag can be better utilized due to the lack of sources of admixture slag in cement production, the actual comprehensive utilization effect of the largest electrolytic manganese slag is not satisfactory, and a large amount is still simply used. Buried or discarded in culverts and ravines, it has a great impact on the ecological environment of groundwater, soil and surface water, and even long-term hidden dangers. Resource Utilization Issues