Method for preparing cement from manganese iron slag

Abstract

The invention discloses a method for preparing cement from manganese iron slag, which comprises the following steps: (a) raw material crushing: crushing the raw materials mainly composed of limestone, manganese iron slag, shale, sandstone and iron ore to respectively obtain limestone particles, manganese iron slag particles, shale particles, sandstone particles and iron ore particles; (b) raw material prehomogenization: carrying out stratified piling on various particles obtained in the step (a); (c) green material preparation; (d) green material homogenization; (e) preheating and decomposition; (f) clinker firing; and (g) clinker milling: cooling the fired clinker, and milling the clinker to the required particle size, thereby completing the cement production. The method can improve the sinterability of the green material, improve the clinker quality, enhance the in-kiln decomposition rate, increase the operation rate of the rotary kiln, lower the clinker firing heat loss and cement comprehensive power consumption, enhance the cement yield and greatly lower the cement production cost.

Description

technical field [0001] The invention relates to the field of cement production, in particular to a method for preparing cement by utilizing ferromanganese slag. Background technique [0002] In recent years, most cement plants use industrial waste slag to mix into cement mainly in the form of admixture, but few use industrial waste slag to replace part of cement production raw materials, mainly because waste slag pollutes the working environment, ingredients are complicated, and on-site control Difficulties, large fluctuations in raw material composition, poor clinker quality and other reasons; while some manufacturers are eager for quick success when using waste residues, in order to reduce production costs, they use as many as three or four types of waste residues, thinking that this can reduce costs; Many problems have indeed occurred in the process, resulting in difficult production control, poor clinker quality, etc., and finally abandoned the utilization of waste resid...

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Problems solved by technology

[0002] In recent years, most cement plants use industrial waste slag to mix into cement mainly in the form of admixture, but few use industrial waste slag to replace part of cement production raw materials, mainly because waste slag pollutes the working environment, ingredients are complicated, and on-site control Difficulties, large fluctuations in raw material composition, poor clinker quality and other reasons; while some manufacturers are eager for quick success when using waste residues, in order to reduce production costs, they use as many as three or four types of waste residues, thinking that this can reduce costs; There are indeed many problems in the process, which lead to difficult production control, poor clinker quality, etc., and finally give up the utilization of waste residue

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