High-quality production process of active calcium oxide

Abstract

The invention relates to a high-quality production process of active calcium oxide. The high-quality production process comprises the following steps: (1) selecting blocky calcite; (2) forming vent holes; (3) forming a glue pouring hole, and pouring a high-thermal-conductivity pouring sealant; (4) impacting the blocky calcite by circulating hot air at the temperature of 380-420 DEG C, and performing calcining for 4-6 hours; (5) continuously heating to 800-1000 DEG C, and performing calcining for 10-12 hours; and (6) removing the heat-conducting adhesive tape to obtain high-quality calcium oxide. The blocky calcite with moderate size is selected, crushing and screening processes are omitted, and the blocky calcite is impacted by circulating hot air, so that the surface of the blocky calciteand the inner walls of the vent holes are uniformly heated, and the heating uniformity of the blocky calcite is improved; and by arranging the heat conduction adhesive tape, high temperature in the calcining box can be transferred into the blocky calcite, the temperature difference between the surface and the interior of the blocky calcite is reduced, and the separation amount of titanium dioxideis increased in the calcining process of the blocky calcite, so that high-quality calcium oxide is prepared.

Description

technical field [0001] The invention relates to the technical field of calcium oxide production, in particular to a high-quality production process of active calcium oxide. Background technique [0002] my country is one of the earliest countries to produce and utilize calcium oxide. Although my country is a big energy country, due to the backward technology, the traditional lime kiln has large pollution, poor quality, high energy consumption and low output, and the quality of the burned lime does not meet the quality requirements. Differs greatly. The traditional production of calcium oxide generally uses limestone as the raw material, and the limestone and solid fuel are mixed together and put into the kiln for calcination. quality. [0003] The Chinese patent with the authorization announcement number CN105217974A discloses a high-quality calcium oxide production process and device. In the first step of the invention, calcite is selected as a raw material, washed and dr...

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Problems solved by technology

[0004] However, the above-mentioned production process has the following defects: in the calcination process of calcite, the separation of carbon dioxide is carried out slowly from the surface to the inside, the second step needs to crush the calcite, and screen out calcite particles with close particle size for later use; if crushed The particle size of calcite is relatively large, and the surface and internal temperature of calcite are not uniform enough when heated, so there is under-burning or over-burning phenomenon, which affects the quality of calcium oxide after calcining; if the particle size of calcite after crushing is small, crushing and screening The process is time-consuming and laborious

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