Slag fine grinding system

Abstract

The invention discloses a slag fine grinding system. The slag fine grinding system comprises a grinding box, the bottom of the grinding box is supported on the ground by a plurality of supporting columns, a clinker grinding disc and a slag grinding disc are arranged inside the grinding box from top to bottom sequentially, the clinker grinding disc and the slag grinding disc separate the interior of the grinding box into a cement clinker grinding chamber, a slag grinding chamber and a stirring chamber from top to bottom sequentially, the clinker grinding disc is suspended at the inner top of the grinding box through a clinker driving device, the slag grinding disc is supported inside the grinding box through a linkage driving device, a plurality of rolling rollers are transversely arrangedon the top surfaces of the slag grinding disc and the clinker grinding disc, and a stirring mechanism used for stirring cement clinkers and slags is arranged in the stirring chamber. According to theslag fine grinding system, an adopted grinding mode is characterized in separately rolling the materials in different chambers to get powders and then stirring and mixing as a whole, the problem thatthe grindability of the slags and the cement clinkers is greatly different in the past is solved, and the high specific surface area and the fineness of the slags and the clinkers after grinding are greatly improved.

Description

technical field [0001] The invention relates to a grinding and stirring device system, in particular to a slag fine grinding system. Background technique [0002] Slag is a by-product of blast furnace ironmaking in steel plants. After water quenching and quenching, it is in the form of light gray glass crystal particles and belongs to industrial waste slag materials. Slag has been used as a cement admixture in my country for more than 40 years, but most of them are ground together with cement clinker, which is an extensive application. Slag with "potential hydraulicity" is the best mixing material for cement production. Ordinary Portland cement (P•O) and slag Portland cement (P•S) can be produced with slag as a mixture. The national standard for general Portland cement stipulates that the content of slag in P•O should not exceed 15%, while The amount of slag in P•S can be 20%~70%. Therefore, P•S is more meaningful for maximizing the use of slag and reducing the cost of cemen...

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Problems solved by technology

[0003] However, the traditional P•S production method is to mix and grind cement clinker and slag in a grinding equipment (mainly a ball mill). Due to the large difference in grindability between clinker and slag, the slag in the obtained cement The average particle size is too large, the content of fine powder is low, and its potential activity cannot be effectively exerted, which affects the early strength and other properties of cement, and also restricts the increase of slag content.

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