Mineral powder mixing amount improving process for road cement

Abstract

The invention discloses a mineral powder mixing amount improving process for road cement. The mineral powder mixing amount improving process comprises the following steps: adjusting the grading of a mill, namely arranging an activation flow-limiting ring in a fine grinding bin to realize powder milling, flow controlling and material raising; adjusting the grading of a grinding body in the mill according to material and cement varieties; comprehensively adjusting material parameters including the process parameters of the sizes of screening devices, in-mill ventilation and rotational speed of the mill to optimize the powder selecting efficiency of the mill; periodically calibrating and checking a dosing scale; improving the clinker strength; adjusting the mixing amount of granulated blast-furnace slag powder to enable the weight percentages of the granulated blast-furnace slag powder, gypsum and clinker to be respectively 8.4%, 4.5% and 87.1% in sequence. According to the invention, the defects that a mill in the prior art is unreasonable in grading, poor in metering accuracy, low in clinker strength and the like are overcome, and the advantages that the mill is reasonable in grading, excellent in metering accuracy and high in clinker strength are achieved.

Description

Technical field [0001] The invention relates to the technical field of cement processing, in particular to a process for increasing the mixing amount of mineral powder in road cement. Background technique [0002] In 2013, due to the expansion project of Liuzhou Airport, our company started mass production of road cement. Taking into account the fierce competition in the cement industry, reducing production costs is the only way for the company; at the same time, the granulated blast furnace slag powder produced by our company's #4 production line slag vertical mill has a large surplus, often full storage and shutdown, and the mill operation rate is low. In order to make full use of the vertical mill production capacity, the company requires the 1# production line to pass through the homogenizer and mix with granulated blast furnace slag powder (referred to as slag powder) to produce road cement. [0003] Guangxi Yufeng Cement Co., Ltd. 1# production line was built in 1958, which ...

AI Technical Summary

Problems solved by technology

From June to October 2013, the strength of clinker reached 55MPa in only one month, and the strength of clinker was relatively low

[0015] Determination of reasons: 1. Unreasonable mill gradation; 2. Inaccurate measurement; 3. Low clinker strength

[0016] In the process of realizing the present invention, the inventors found that there are at least defects such as unreasonable mill gradation, poor measurement accuracy and low clinker strength in the prior art

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