Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Process for preparing cement clinker additive from stainless steel pickling sludge
The invention discloses a process for preparing a cement clinker additive from stainless steel pickling sludge, wherein the process comprises the following steps: S1, adding ferrous sulfate and liquidenvironment-friendly alkali into stainless steel pickling wastewater to obtain stainless steel pickling sludge; S2, adding fly ash into the stainless steel pickling sludge, uniformly mixing, and carrying out high-temperature dehydration treatment; S3, crushing and grinding the dewatered sludge into fine powder, adding 4%-6% of kaolin, uniformly mixing, and granulating; and S4, carrying out high-temperature calcination on the granulated material, and then crushing to obtain the clinker additive. According to the method, heavy metal ions in the pickling sludge generated in the stainless steel production process can be converted into harmless substances meeting the national environmental protection requirements; the content of metal Cr in the cement clinker obtained through the method is lower than 0.47%, the content of Ni in the cement clinker is lower than 0.06%, the quality of the cement clinker meets the index requirements of corresponding national product standards, reliability is high, and operation cost is low.
本发明公开了一种不锈钢酸洗污泥用于水泥熟料添加剂的制作工艺，包括以下步骤：S1、在不锈钢酸洗废水中加入硫酸亚铁和液体环保碱，得到不锈钢酸洗污泥；S2、在不锈钢酸洗污泥中加入粉煤灰，混合均匀后进行高温脱水处理；S3、将脱水后的污泥粉碎研磨至细粉状并加入4％～6％的高岭土，混合均匀后造粒；S4、将造粒后的物料进行高温煅烧，然后粉碎得到熟料添加剂。本发明可以把不锈钢生产过程中产生的酸洗污泥中重金属离子转化为符合国家环保要求的无害化物质；本发明方法所得到的水泥熟料中金属Cr含量低于0.47％，Ni含量低于0.06％，质量均符合国家相应产品标准的指标要求，而且可靠性高，运行费用低。
Process for preparing cement clinker additive from stainless steel pickling sludge
The invention discloses a process for preparing a cement clinker additive from stainless steel pickling sludge, wherein the process comprises the following steps: S1, adding ferrous sulfate and liquidenvironment-friendly alkali into stainless steel pickling wastewater to obtain stainless steel pickling sludge; S2, adding fly ash into the stainless steel pickling sludge, uniformly mixing, and carrying out high-temperature dehydration treatment; S3, crushing and grinding the dewatered sludge into fine powder, adding 4%-6% of kaolin, uniformly mixing, and granulating; and S4, carrying out high-temperature calcination on the granulated material, and then crushing to obtain the clinker additive. According to the method, heavy metal ions in the pickling sludge generated in the stainless steel production process can be converted into harmless substances meeting the national environmental protection requirements; the content of metal Cr in the cement clinker obtained through the method is lower than 0.47%, the content of Ni in the cement clinker is lower than 0.06%, the quality of the cement clinker meets the index requirements of corresponding national product standards, reliability is high, and operation cost is low.
本发明公开了一种不锈钢酸洗污泥用于水泥熟料添加剂的制作工艺，包括以下步骤：S1、在不锈钢酸洗废水中加入硫酸亚铁和液体环保碱，得到不锈钢酸洗污泥；S2、在不锈钢酸洗污泥中加入粉煤灰，混合均匀后进行高温脱水处理；S3、将脱水后的污泥粉碎研磨至细粉状并加入4％～6％的高岭土，混合均匀后造粒；S4、将造粒后的物料进行高温煅烧，然后粉碎得到熟料添加剂。本发明可以把不锈钢生产过程中产生的酸洗污泥中重金属离子转化为符合国家环保要求的无害化物质；本发明方法所得到的水泥熟料中金属Cr含量低于0.47％，Ni含量低于0.06％，质量均符合国家相应产品标准的指标要求，而且可靠性高，运行费用低。
Process for preparing cement clinker additive from stainless steel pickling sludge
不锈钢酸洗污泥用于水泥熟料添加剂的制作工艺
30.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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