Coal-saving desulfurization synergistic additive for cement clinker calcination

Abstract

The invention discloses an additive of coal saving and increased desulphurization function used for burning cement clinker. Calcium oxide, silicon dioxide, calcium ammonium nitrate, sodium nitrate, potassium permanganate, ammonium nitrate, ferric oxide, alumina, active carbon and borax are mixed by certain weight percentage and grinded into powder with particle size of 100 to 150 meshes in a grinder; then the powder is placed into a stirrer and stirred, after which, the powder is inspected and packed as finished product if qualified. The invention has remarkable desulphurization function and energy conservation and consumption reduction effect; besides, the invention has promotion function for the combustion of coal and increases the output and quality of the cement clinker. The intensity of the cement clinker can be increased by over 5MPa; the desulphurization rate can reach 35 to 55 percent; the soot emission concentration is clearly decreased; the discharge amount of sulfur dioxide and nitrogen oxide is greatly reduced; therefore, the invention is additive of energy conservation and environmental protection specially used for cement, which can save energy, reduce consumption, increase output and profit, remove environmental pollution, increase income and cut expenditures.

Description

technical field [0001] The invention relates to a coal-fired additive, in particular to a coal-saving desulfurization synergistic additive for cement clinker calcination. Background technique [0002] The existing dry-process cement production generally uses bituminous coal, which has strict requirements on volatile matter, ash content, and sulfur content, resulting in the failure of low-quality coal resources to be fully utilized in the cement industry. With the economic construction and social development of our country, the demand for energy is increasing. Under the current situation of insufficient energy supply and coal supply that cannot guarantee the coal quality required by the cement industry, the coal type used by most cement plants changes frequently. And coal will produce SO during the combustion process 2 And nitrogen oxides are emitted into the atmosphere, seriously polluting the atmospheric environment. [0003] In order to improve the combustion of coal an...

AI Technical Summary

Problems solved by technology

At present, cement manufacturers generally install flue gas desulfurization devices and large bag dust removal equipment on coal kilns. Although these devices have some effects on desulfurization and dust removal, the desulfurization and dust removal effects are not very obvious, and they cannot play a role in supporting the combustion of coal. The goal of saving coal and reducing consumption cannot be achieved

Most of the commercially available combustion aids have disadvantages such as high dosage, high price and selectivity to coal types.