Lime kiln device adopting circulating hot air

Abstract

The invention relates to a lime kiln device adopting circulating hot air and a production method for industrial lime. According to the lime kiln device adopting the circulating hot air and the production method for the industrial lime, in the preparation process of the lime, limestone is calcined by using the circulating hot air, the calcined waste circulating hot air is used for preheating limestone ore, and the preheated waste circulating hot air is cooled, is subjected to dust removal, then is conveyed to a regenerative heating furnace set, is heated to a set calcining temperature and thenis sent back to a lime kiln system for calcining. The lime kiln device adopting the circulating hot air and the production method for the industrial lime have the advantages that the limestone is calcined by using the circulating hot air, so that the quality of the lime can be remarkably improved, the yield of the lime can be increased, the productivity can be improved, and high-purity CO2 can beconveniently recycled; and the lime kiln system adopts the regenerative heating furnace set for heating, a lime kiln is not provided with a burner system, regenerative heating furnaces can utilizes low-heating-value blast furnace gas as fuel, and therefore the structure of a kiln body can be conveniently simplified, and the operation cost of the lime kiln can be lowered.

Description

technical field [0001] The invention relates to a lime kiln using gas as fuel and a process method for using the lime kiln to produce lime. Background technique [0002] Lime is calcium oxide (CaO), which is widely used in iron and steel industry, calcium carbide industry, alumina industry, refractory materials and other industries, and is also one of the necessary production raw materials in these large-scale industrial fields. of steel requires about 70 kg of lime. The main raw material for making lime is limestone, and the main component of limestone is calcium carbonate (CaCO 3 ), the basic principle of burning lime is to use high temperature to decompose calcium carbonate in limestone into calcium oxide and carbon dioxide. [0003] Basic Reaction Formula: CaCO 3 +42.5Kcal = CaO+CO 2 [0004] The lime production process is mainly divided into preheating, calcination, cooling and ash unloading. The process method based on the existing lime production technology is: ...

AI Technical Summary

Problems solved by technology

[0021] As mentioned above, for the above-mentioned research close to the present invention, because it does not solve the common technical problems of various gas-fired kilns, these researches cannot be widely used.

Images