Method for preparing special sulfate cementitious material by treating electrolytic manganese slag with boiling furnace

Abstract

A method of preparing a special sulfate cementing material through treatment on electrolytic manganese residues in a fluidized bed boiler includes the following steps: 1) material preparation: metering and preparing following raw materials comprising, by weight, 45-80 parts of the electrolytic manganese residues, 8-25 parts of stone coal and 10-45 parts of waste stone residue; (2) preparation of matured slag: continuously feeding the weighed and prepared raw materials into the fluidized bed boiler, roasting the raw materials under an oxidizing atmosphere at 800-1280 DEG C for 0.3-1.5 h with overflow rapid-cooling at a material outlet to obtain the matured slag; and (3) preparation of the special sulfate cementing material: grinding the matured slag until sieve residue mass of the matured slag is not more than 20% through a 80 [mu]m sieve to obtain the special sulfate cementing material. According to the method, the special sulfate cementing material contains various hydrated active minerals, so that the material can be widely used in cement industry, is high in strength during use, and has an excellent strength when being used as activated slag powder or for producing building materials. The method is less in investment, is free of waste water and waste residue and is good in economy.

Description

technical field [0001] The invention relates to a method for preparing sulfate gelling material from electrolytic manganese slag, in particular to a method for preparing sulfate gelling material from electrolytic manganese slag with a fluidized fluidized furnace. Background technique [0002] my country is the world's largest manganese industry country, with pure manganese output accounting for more than 95% of the world's total. The waste slag discharged during the manganese industry processing is manganese slag, including "manganese slag" and "manganese slag". Manganese slag is a kind of water-quenched blast furnace slag formed by water-quenching high-temperature slag discharged during the smelting process of ferromanganese alloy or silicon-manganese alloy. One ton of ferromanganese alloy can produce 2 to 2.5 tons of manganese slag, and its activity is only Blast furnace slag inferior to pig iron smelting, superior to low-calcium fly ash, can be directly used as cement adm...

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