Coal dust combustion improver for cement kiln

Abstract

The invention discloses coal dust combustion improver for cement kilns, which comprises the following components by weight percentage: 50-80% of manganese ore, 10-40% of chemical activator, 5%-15% of clinker sintering agent, and less than 2% of moisture content. The coal dust combustion improver for cement kilns of the invention has the effects of promoting concentrated combustion of coal powder and improving the strength of clinks, and the combustion-supporting mechanism of the coal dust combustion improver is as follows: by combustion-supporting components, the fire point of coal powder is decreased, the melting point of coal powder ash is increased, and combustion atmosphere is regulated at high temperature, thereby achieving the purpose of utilizing fault coal fully in the process of cement burning and the purposes of promoting the sintering reaction of clinkers and improving the strength of clinkers by adding combustion improver components of cement clinkers.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a pulverized coal combustion accelerant for cement kilns. Background technique [0002] As the main building material, cement concrete occupies an important position in the national economy. my country's cement output has ranked first in the world for more than ten consecutive years. In the past five years, the annual cement output has grown at an average annual rate of 15%. In 2008, the total cement output reached 1.388 billion tons, accounting for 55% of the world's total cement output. Cement production consumes a lot of resources and energy, and fuel costs account for more than 60% of cement production costs. In 2008, my country's cement clinker calcined coal used reached 186 million tons, accounting for 6.7% of the country's coal production. Reducing energy consumption and reducing environmental load, so that the cement industry enters the development stage of en...

AI Technical Summary

Problems solved by technology

These additives are generally fluorides, sulfides (or sulfates) or their complexes. The principle is to reduce the formation of liquid phase and clinker firing temperature, and promote the formation of cement clinker minerals, but it will cause skinning of the pre-decomposition system, Blockage will also cause erosion and damage to equipment, increase air pollution, and reduce clinker quality; and it cannot promote fuel combustion, and the effect of saving coal is not obvious