A kind of limestone powder preparation process

Abstract

The invention relates to a preparation process of limestone powder. The preparation process mainly includes the following preparation steps of crushing and feeding, grinding, grading and powder selecting, collecting and transporting and finished product storing. A transmission mechanism includes a transmission motor, a mounting frame, a transmission shaft and a grading rotor, a scattering mechanism includes a fixing sleeve ring, a scattering disk, an extrusion ring, a compression frame, a fixing plate and a connecting rod, a guide mechanism includes a mounting ring, a guide vane, an expansionplate, a convex column and an adjusting ring, the grading rotor includes a connecting plate, a vertical partition plate, a stiffening plate and a mounting plate, and the extrusion ring includes a ringbody, a first extrusion block and a second extrusion block. According to the preparation process, the structures of the scattering disk and the transmission mechanism are improved, the purposes of prolonging the scattering time of the limestone powder and weakening the inertial anti-swirl phenomenon are achieved, compared with an existing powder preparation process, the grading effect is more ideal, and separation of fine powder and coarse powder is more thorough.

Description

technical field [0001] The invention relates to the technical field of limestone powder processing, in particular to a limestone powder preparation process. Background technique [0002] The main component of limestone is calcium carbonate. Limestone is a raw material widely used in building materials and industries. It can be directly processed into stone and fired into quicklime. Quicklime is white or gray lumpy. For ease of use, lumpy quicklime often needs to be processed into quicklime powder, slaked lime powder or lime paste. There are two desulfurization processes used by most domestic power plants: control during combustion - fluidized bed combustion and control after boiler combustion - flue gas desulfurization. Limestone is rich in absorbent resources and cheap. The process has higher requirements on the fineness of the finished limestone powder. [0003] In order to process limestone powder with qualified fineness, it is necessary to go through the step of classi...

AI Technical Summary

Problems solved by technology

[0004] a. With the enlargement of the powder selection equipment, the increase in the size of the spreading tray is not proportional to the increase in the amount of processed materials, and the materials tend to slide out of the spreading tray in groups when they are completely scattered, resulting in the failure of fine powder and coarse powder. complete separation;

[0005] b. When the number of rotor blades is small, the phenomenon of inertial anti-vortex is more obvious. When the number of rotor blades is large, the phenomenon of inertial anti-vortex is weakened, but because the gap between the blades becomes smaller, it is not conducive to the passage of fine powder, and it is easy to cause blockage;

[0006] c. The inclination angle of the guide vanes has an important impact on the classification efficiency and classification accuracy, and the installation angle of the guide vanes is determined during work, which cannot be adjusted according to actual work needs

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