Inferior coal catalysis sulfur-fixing agent for cement industry

Abstract

The invention provides a low-quality coal catalytic sulfur-fixing agent for the cement industry. The mass percentages of the components in the catalytic sulfur-fixing agent are: 10-36% of potassium perchlorate, 5-17% of sodium chloride, and 1-5% of Tween %, catalyst 30-55%; among them, the mass percentage of each component in the catalyst is: calcium carbonate 10-18%, iron oxide 6-17%, boron oxide 1-2%, rare earth tailings 68-83%; rare earth The components and mass percentages of the tailings are: 5-12% of cerium oxide, 10-22% of lanthanum oxide, 55-75% of neodymium oxide and 5-12% of cerium nitrate. The catalytic sulfur-fixing agent provided by the invention can not only promote the combustion of coal powder, increase the burnout rate of coal powder, but also reduce sulfide emission without any negative impact on the performance of cement clinker.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a catalytic sulfur-fixing agent for low-quality coal used in the cement industry. Background technique [0002] The main fuel used in the production of cement industry is coal. With the increasing shortage of high-quality bituminous coal and the increasing price of coal, the cement industry is developing towards the direction of using inferior fuel. However, the use of low-quality coal in cement production will deteriorate the combustion characteristics, increase energy consumption, affect clinker calcination, and ultimately affect product quality. To make low-quality coal meet the requirements of cement production, the combustion characteristics of low-quality coal must be improved. [0003] In addition, some low-quality coal will produce a large amount of sulfide during the combustion process, causing the SO2 emission concentration in the cement kiln flue gas to...

AI Technical Summary

Problems solved by technology

In order to improve the combustion status of low-quality coal and reduce the emission of sulfide, some research work has been carried out on the research and use of coal-fired combustion accelerants at home and abroad, but most of them are aimed at the efficient utilization of coal in power plants or industrial boilers. Of course, due to the production principle and Due to the difference in the process, on the one hand, the combustion aids used in production cannot meet the needs of the combustion characteristics of pulverized coal in the new dry process;