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Method for producing general cement without introducing polluting chromium

A production method and element technology, applied in the field of building materials production, can solve problems such as chromium element pollution

Inactive Publication Date: 2015-09-30
张志村
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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the chromium element pollution caused by raw material grinding and cement grinding in the cement production process due to material consumption, and to provide a general cement production method that does not bring in polluting chromium elements. The method directly eliminates the introduction of polluting chromium elements in the cement production process, and solves the problem of polluting chromium elements brought in due to the grinding process

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  • Method for producing general cement without introducing polluting chromium

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Embodiment approach

[0013] When implementing the present invention, the chromium element-containing metal liner of the ball mill used in the general cement production process is replaced with a chromium-free industrial ceramic liner, and at the same time, the chromium-containing alloy grinding body is replaced with a ceramic material grinding body. The specific grading scheme of grinding bodies determined according to different sizes, specifications and shapes should be determined by those skilled in the art according to the actual situation of the specific grinding machine, which is not involved in the present invention. The ball mill includes a raw material ball mill, an ore powder ball mill and a cement grinding ball mill.

[0014] The scheme of the present invention and the comparison results before and after effects are shown in Table 1.

[0015] Table 1

[0016]

[0017] 1. Quality index of high chromium ball:

[0018] The chromium content ≥ 10.0% and the carbon content between 1.80%...

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Abstract

The invention discloses a method for producing general cement without introducing polluting chromium. According to the method, a ceramic grinding body containing no chromium and a ceramic liner plate containing no chromium are adopted in a general cement ball mill. By improving an original alloy liner plate containing chromium and an original alloy grinding body containing chromium into the ceramic liner plate containing no chromium and the ceramic grinding body containing no chromium, polluting chromium is directly prevented from being introduced into raw materials, mineral powder and cement which are ball-ground by the cement ball mill in the powder milling process, and thus the problem that chromium is introduced due to abrasive consumption of the currently-used alloy liner plate containing chromium and the alloy grinding body containing chromium, and accordingly general cement is polluted is solved easily. The method for producing general cement without introducing polluting chromium has great significance on the aspect of environmental protection.

Description

technical field [0001] The invention relates to a general cement production method without polluting chromium elements, which belongs to the environmental protection in the field of building material production. Background technique [0002] The pollution of heavy metal chromium in general cement is a major environmental problem that needs to be solved urgently. With the implementation of national standards for limiting the content of chromium in cement, the industry is trying to find a green and environmentally friendly production plan to solve the problem of excessive chromium in general cement. [0003] There are two main sources of chromium in cement, one is contained in the raw materials itself, and the other is brought in by the material consumption of the used parts due to wear, corrosion, and crushing during the production and processing process. In terms of material consumption, the consumption of chromium-containing refractory bricks in the clinker firing process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/52C04B7/38
Inventor 张志村李志军袁维红张华张宇
Owner 张志村
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