Novel dry-process white cement raw material preparation device and process

Abstract

The invention belongs to the technical field of white Portland cement, and particularly relates to a novel dry-process white cement raw material preparation device and process. The novel dry-process white cement raw material preparation device comprises a silicon-aluminum raw material grinding system and a calcium raw material grinding system, wherein the silicon-aluminum raw material grinding system is used for grinding silicon-aluminum raw material with poor grindability, the calcium raw material grinding system is used for grinding and sorting calcium raw material with good grindability, and mixing with the qualified-fineness silicon-aluminum raw material ground through the silicon-aluminum raw material grinding system is carried out. The novel dry white cement raw material preparationdevice and process can improve the quality of a raw material finished product, the raw material components are stable, the system energy consumption is low, and the heat consumption is low.

Description

technical field [0001] The invention belongs to the technical field of white Portland cement, and in particular relates to a novel dry-process white cement raw meal preparation device and process. Background technique [0002] Existing techniques and drawbacks: [0003] White Portland cement clinker production process is very different from ordinary gray cement clinker production process, such as limestone beneficiation, raw material preparation, clinker bleaching, clinker grinding, cement packaging, etc. Compared, both in process flow and equipment selection are unique. [0004] The general design principles of the white Portland cement production line are: minimize the pollution of non-ferrous metal elements, strictly control the MgO, SO 3 and Fe 2 o 3 content, to obtain white cement clinker with high whiteness and strength. The key to the raw meal preparation system is not only to make the prepared raw meal products meet the calcination requirements of firing, but al...

AI Technical Summary

Problems solved by technology

When using the traditional mixed grinding process to prepare raw meal, there are the following problems: the grindability of different raw materials is quite different, and when the powder is ground to a certain fineness, in terms of the distribution of raw meal components, calcium raw materials such as limestone are mainly concentrated In the finer particle part, siliceous raw materials such as quartz sand are mainly concentrated in the coarser particle part

When the raw meal is prepared by using the dry-wet combination grinding process, there are the following problems: ① When the siliceous raw material is ground by the wet ball mill, the power consumption of the grinding system is high, and the energy consumption is large; ② The slurry discharged from the wet ball mill contains The water content exceeds 45%, so that the comprehensive water content of the mill is as high as more than 15%, which requires a lot of heat to dry the material, and the heat consumption is large; ③ Due to the large water content of the slurry and poor dispersion, it is difficult to fully mix with other dry materials, resulting in raw material The composition is unstable and fluctuates greatly, which affects the subsequent calcination process and clinker quality

④Complicated process

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