Production method of active lime and production system thereof

Abstract

The invention relates to the field of chemical engineering, and particularly relates to a production method of active lime and a production system thereof. The production method of active lime comprises the following steps: mixing: mixing 8-20 parts of mountain flour and 1-2 parts of pulverized coal in parts by weight to form a mixed material; calcining: calcining the mixed material at 900-1200 DEG C, wherein the grain size of the mountain flour is less than 0.5cm. As the mountain flour and the pulverized coal are mixed, when the mixed material formed by the mountain flour and the pulverized coal is placed in a mixed material calcining device to be calcined, the pulverized coal which burns at high temperature releases heat to uniformly provide heat to decomposition of calcium carbonate in the mountain flour, so that calcium carbonate in the mountain flour is uniformly decomposed. The mountain flour and the pulverized coal are mixed according to a predetermined proportion. Heat released by burning the pulverized coal can provide enough heat to decompose calcium carbonate, so that decomposition of calcium carbonate in the mountain flour is accelerated, the time required by calcining is shortened, and the production efficiency of active lime is improved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a production method of active lime and a production system thereof. Background technique [0002] The existing active lime production method is to crush the mined limestone into particles with a diameter of 2cm-15cm, stack them in a shaft kiln, and use coal or natural gas as fuel for high-temperature calcination, so that the calcium carbonate in the limestone can be fully decomposed at high temperature Become calcium oxide and carbon dioxide, that is, active lime. [0003] In this active lime production method, when the limestone particles are calcined, they are heated outside the calcining equipment, and the heat is gradually transferred from the surface of the limestone to the interior of the limestone. Heat, a large amount of heat is absorbed by the calcium carbonate in the outer layer, therefore, the temperature of the inner layer of the limestone particles often cannot reac...

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Problems solved by technology

[0003] In this active lime production method, when the limestone particles are calcined, they are heated outside the calcining equipment, and the heat is gradually transferred from the surface of the limestone to the interior of the limestone. Heat, a large amount of heat is absorbed by the calcium carbonate in the outer layer, therefore, the temperature of the inner layer of the limestone particles often cannot reach the temperature required for calcination, so the decomposition rate of the calcium carbonate in the inner layer of the limestone particles is slower, only when After the calcium carbonate on the surface of the limestone is decomposed, the calcium carbonate on the inner layer can absorb enough heat to fully decompose, and the diameter of the limestone is between 2cm-15cm, which causes the limestone with a smaller diameter to be completely decomposed. Larger limestone still needs to continue to be heated and decomposed, resulting in a longer time for calcination, which in turn reduces the production efficiency of active lime

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