Novel powder nanometer catalytic sulfur fixation agent for dry cement raw material, and preparation method thereof

Abstract

The invention discloses a novel powder nanometer catalytic sulfur fixation agent for a dry cement raw material, and a preparation method thereof, wherein the novel powder nanometer catalytic sulfur fixation agent comprises nanometer lanthanum oxide, nanometer thorium oxide, nanometer praseodymium oxide, nanometer titanium oxide, nanometer nickel oxide, nanometer magnesium oxide, nanometer calcium oxide, nanometer calcium carbonate, hydroxyl calcium, potassium permanganate, potassium bismuthate, fly ash, carbon black, and the balance of a dispersion carrier. According to the technical scheme, by adding europium oxide and aluminum acetylacetonate, the sulfur fixation efficiency can achieve more than 98%. According to the present invention, the product is mixed into the raw material through the air chute in front of the homogenizing bin, and at the high temperature, the surface activity of the raw material is improved and the activation energy of the reaction with sulfur dioxide is sufficiently reduced through catalysis, oxidation and metal ion exchange, such that SO2 generated during the combustion process generates the sulfate-like solid material, and sulfate-like solid material is subjected to solid solution into the cement clinker so as not to cause corrosion and other side effects on the cement pre-heater, the kiln and other equipment.

Description

technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, and in particular relates to a novel dry-process cement raw meal powder nano-catalyzed sulfur-fixing agent and a preparation method thereof. Background technique [0002] my country is a big country in cement production. In 2016, the output of cement was 2.4 billion tons. Cement has played a pivotal role in the development of human beings and society. At the same time, it has also brought harm to human beings and the ecological environment. The emission of dust and harmful gases has seriously damaged the atmosphere. environment and human health. Cement production is inseparable from limestone mines. With the annual consumption of low-sulfur limestone, cement plants have begun to use limestone mines with higher sulfur content, especially the high content of pyrite and organic sulfur in limestone mines, resulting in excessive emissions of sulfur dioxide in flue gas...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of low sulfur-fixing efficiency and high cost in the above-mentioned prior art, and provides a powder nano-catalyzed sulfur-fixing agent for cement raw meal. and metal ion exchange to improve the surface activity of the raw meal, fully reduce the activation energy of the reaction with sulfur dioxide, so that the SO generated during the calcination process 2 Under the action of catalysts, oxidants, and sulfur-fixing synergists, sulfate-like solid substances are generated and solid-dissolved into cement clinker, thereby reducing SO 2 Discharge, in order to achieve the above object, the present invention adopts the following technical solutions:

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