Inferior coal catalysis sulphur-fixing agent used in cement industry and preparing and using methods thereof

Abstract

The invention discloses an inferior coal catalysis sulphur-fixing agent used in the cement industry. Potassium perchlorate, sodium chloride and tween are used as oxygenate, a bulking agent and a dispersing agent respectively, and a catalyst is prepared from 10-18% of calcium carbonate, 6-17% of ferric oxide, 1-2% of boric oxide and 68-83% of rare earth tailings. The catalysis sulphur-fixing agent is prepared from, by mass, 30-36% of the oxygenate, 8-17% of the bulking agent, 2-5% of the dispersing agent and 48-55% of the catalyst, wherein the rare earth tailings are prepared from, by mass, 5-12% of ceric oxide, 10-22% of lanthanum oxide, 55-75% of neodymium oxide and 5-12% of cerous nitrate. The invention further discloses preparing and using methods of the catalysis sulphur-fixing agent. The catalysis sulphur-fixing agent can promote coal powder combustion and reduce emission of sulfide and has no negative effect on performance of cement clinker.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a low-quality coal catalytic sulfur-fixing agent for cement industry and its preparation and use method. 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, resulting in SO in the cement kiln...

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;