Unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw material

Abstract

The invention relates to an unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw materials, belonging to the technical field of resources and environment. The method uses the carbide slag as the calcareous raw materials, and the cement clinker is calcined by using a novel dry technology, which is characterized in that: either 100 percent of carbide slag or 100 percent of limestone can be used as the calcareous raw materials, or the carbide slag and the limestone can be mixed at any ratio for use. A main process comprises the following steps of: (1) kiln rear feeding, in which a preheater can be switched between the stage 3 and the stage 5 through changing a position of a material feeding point; (2) raw material pre-decomposition, in which a five-stage preheater which is switchable to a three-stage preheater and an enhanced suspension spray type decomposition furnace are used in order to combust the fuels and decompose the raw materials, wherein the outlet temperature of the decomposition furnace is controlled between 700 and 890 DEG C; and (3) rotary kiln calcining, in which the decomposed raw materials enter the kiln to be calcined into the cement clinker. The method has the characteristics of high resource regeneration level of the carbide slag, obvious energy-saving and emission-reduction effect, strong system compatibility andthe like.

Description

technical field [0001] The invention relates to a method for producing cement clinker that is unrestrictedly compatible with carbide slag and limestone as raw materials, and belongs to the field of resources and environment technology, in particular to a method for producing cement that is unrestrictedly compatible with carbide slag and limestone as calcium raw materials and adopts a new dry method technology clinker method. Background technique [0002] Carbide acetylene devices are widely used in my country, and a large amount of waste slag (carbide slag) is produced in the process. The main component of calcium carbide slag is Ca(OH) 2 , which will cause serious pollution to the environment and is difficult to handle. However, it is a good way to use calcium carbide slag as a calcareous raw material to replace lime minerals to produce cement clinker. It can not only eliminate pollution, but also save limestone minerals, reduce cement production costs, and achieve the goa...

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problem that the new dry cement carbide slag technology and the current new dry process cannot be compatible with calcium carbide slag and limestone, and provides a new cement production method with calcium carbide slag, and the calcium raw material can be compatible 100% use of carbide slag and 100% use of limestone and any combination of the two

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