Technology for preparing cement by dry carbide slag method

Abstract

The invention relates to a technology for preparing cement by a dry carbide slag method, which comprises the following steps: raw material storage, transportation, mixture, calcinations, grinding, and the like. Dry carbide slag powder with the moisture from 5 percent to 8 percent, which is discharged by a dry acetylene technical generator, is sealed, transported and stored by a pipe chain machine and a bucket lifting machine; stored raw materials and black raw materials ground in a drying process comprise aeolian sand, sulfate slag and lime slag; carbide ash is transported to a dry pipe by an FU chain transporting machine for initially mixing and drying after being automatically matched and ground by a reservoir bottom microcomputer; raw materials with the moisture which is less than 1 percent are collected by a high-efficiency cyclonic collector and are transported to a raw material homogenizing storehouse to mix by gravity; the raw materials are calcined from a three-grade preheater and a decomposing furnace to a rotary kiln; and after the raw materials are cooled, the raw materials, fly ash, carbide ash and citric acid slag are transported to a cement mill to grind after being metered by a speed-regulating constant feed weigher. The technology increases the participation quantity and the economic benefit of the carbide slag, reduces the environmental pollution and the resource waste, can be used by combining the dry acetylene producing technology and the traditional technology and can be singly used.

Description

technical field [0001] The invention relates to a method for making cement by using dry carbide slag, in particular to a method for making cement with waste carbide slag through a dry method and reducing pollution. Background technique [0002] At present, many chlor-alkali enterprises in our country are expanding on a large scale, and the production of vinyl chloride by calcium carbide method will be the main process route. In 2007, the annual production of calcium carbide in my country totaled 14.8189 million tons. The discharge of calcium carbide slag and the stock in the past years will exceed hundreds of millions of tons. Long-term stacking pollutes the environment and occupies land resources, which has restricted the sustainable development of polyvinyl chloride (PVC) production enterprises. The effective utilization of carbide slag is increasingly urgent. In recent years, some progress has been made in the research on the application technology of carbide slag, such a...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems in the prior art such as low calcium carbide slag admixture, easy damage to equipment, difficult operation control, low economic benefit, and environmental pollution in the process of making cement from carbide slag; and to provide a calcium carbide slag Cement production - dry calcium carbide slag dry method cement production process with high content of dry carbide slag, advanced technology, low equipment maintenance rate, simple crushing, high economic benefits, low environmental pollution, simple process design, and easy operation control

Images