A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a cement production process capable of reducing chromium content in cement. The method mainly comprises the following steps: proportioning limestone, clay, silica, converter slag, barium-containing waste residues and the like to obtain a raw material, sequentially carrying out raw material grinding and homogenization treatment, carrying out high-solid-gas-ratio suspension preheating pre-decomposition, calcining the decomposed raw material in a rotary kiln to obtain a clinker, subjecting the clinker, gypsum and a mixed material to cement grinding to obtain the cement. According to the method, the chromium content in the cement can be reduced, the physical quality of the cement is improved, the harm of water-soluble hexavalent chromium is effectively reduced, and harmless treatment of the converter slag is realized, so that huge economic and social benefits are generated.
本发明公开了一种可降低水泥中铬含量的水泥生产工艺，主要内容为：采用石灰石、黏土、硅石、转炉渣和含钡废渣等进行生料配料，依次经过生料粉磨、均化处理、采用高固气比悬浮预热预分解后在回转窑中煅烧成熟料，采用熟料、石膏和混合材进行水泥粉磨制备。本发明可降低水泥中的铬含量，提高了水泥的实物质量，有效降低了水溶性六价铬的危害，实现转炉渣无害化处理，从而产生巨大的经济和社会效益。
The invention discloses a cement production process capable of reducing chromium content in cement. The method mainly comprises the following steps: proportioning limestone, clay, silica, converter slag, barium-containing waste residues and the like to obtain a raw material, sequentially carrying out raw material grinding and homogenization treatment, carrying out high-solid-gas-ratio suspension preheating pre-decomposition, calcining the decomposed raw material in a rotary kiln to obtain a clinker, subjecting the clinker, gypsum and a mixed material to cement grinding to obtain the cement. According to the method, the chromium content in the cement can be reduced, the physical quality of the cement is improved, the harm of water-soluble hexavalent chromium is effectively reduced, and harmless treatment of the converter slag is realized, so that huge economic and social benefits are generated.
本发明公开了一种可降低水泥中铬含量的水泥生产工艺，主要内容为：采用石灰石、黏土、硅石、转炉渣和含钡废渣等进行生料配料，依次经过生料粉磨、均化处理、采用高固气比悬浮预热预分解后在回转窑中煅烧成熟料，采用熟料、石膏和混合材进行水泥粉磨制备。本发明可降低水泥中的铬含量，提高了水泥的实物质量，有效降低了水溶性六价铬的危害，实现转炉渣无害化处理，从而产生巨大的经济和社会效益。
Cement production method capable of reducing cement waste
| European Patent Office | 2021
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| European Patent Office | 2024
New chromium reducing agent for cement
| Tema Archive | 2008