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A platform for research: civil engineering, architecture and urbanism
Chromium-containing sludge ceramsite and preparation method thereof
The invention discloses chromium-containing sludge ceramsite, which is prepared from the following raw materials in percentage: 50 to 70 percent of coal slag, 0.5 to 2 percent of tar residue, 20 to 40 percent of chromium-containing sludge, 3 to 15 percent of sea mud and 0.5 to 0.8 percent of binder. The invention also provides a corresponding preparation method. Herein, the coal slag, the tar residue, the chromium sludge and the sea mud are used for producing the ceramsite, the sea mud is used as a foaming substance, the tar residue is used as a reducing agent, and residual carbon in the tar residue is incompletely combusted at high temperature to generate CO to form a reducing atmosphere, so that Cr (VI) in the chromium-containing sludge is reduced into Cr (III), the chromium-containing sludge is detoxified, safe disposal of the chromium-containing sludge is achieved, and the occupied area of solid waste is reduced. According to the invention, the resources are saved, waste is turned into wealth, environmental pollution is avoided, the ceramsite is mainly prepared from the solid waste, the production cost is greatly reduced, and good economic benefits and social benefits are achieved; in addition, the method for preparing the ceramsite is simple in production process, controllable in process and good in reproducibility.
本发明公开一种含铬污泥陶粒，由以下百分比含量的原料制成：煤炉渣50‑70%、焦油渣0.5‑2%、含铬污泥20‑40%、海泥3‑15%、粘结剂0.5‑0.8%。同时还提供其相应的制备方法。本发明利用煤炉渣、焦油渣、铬泥、海泥来生产陶粒，海泥为发泡物质，焦油渣为还原剂，利用焦油渣中残余碳在高温下不完全燃烧生成CO形成还原气氛，使含铬污泥中Cr（Ⅵ）被还原为Cr（Ⅲ），从而使含铬污泥解毒，使得含铬污泥安全处置，减少了固体废弃物的占地面积，节约资源、变废为宝，避免环境污染，本发明的陶粒主要由固体废弃物制成，极大降低了生产成本，具有良好的经济效益和社会效益；本发明制备陶粒的方法，生产工艺简单、过程可控制，重现性好。
Chromium-containing sludge ceramsite and preparation method thereof
The invention discloses chromium-containing sludge ceramsite, which is prepared from the following raw materials in percentage: 50 to 70 percent of coal slag, 0.5 to 2 percent of tar residue, 20 to 40 percent of chromium-containing sludge, 3 to 15 percent of sea mud and 0.5 to 0.8 percent of binder. The invention also provides a corresponding preparation method. Herein, the coal slag, the tar residue, the chromium sludge and the sea mud are used for producing the ceramsite, the sea mud is used as a foaming substance, the tar residue is used as a reducing agent, and residual carbon in the tar residue is incompletely combusted at high temperature to generate CO to form a reducing atmosphere, so that Cr (VI) in the chromium-containing sludge is reduced into Cr (III), the chromium-containing sludge is detoxified, safe disposal of the chromium-containing sludge is achieved, and the occupied area of solid waste is reduced. According to the invention, the resources are saved, waste is turned into wealth, environmental pollution is avoided, the ceramsite is mainly prepared from the solid waste, the production cost is greatly reduced, and good economic benefits and social benefits are achieved; in addition, the method for preparing the ceramsite is simple in production process, controllable in process and good in reproducibility.
本发明公开一种含铬污泥陶粒，由以下百分比含量的原料制成：煤炉渣50‑70%、焦油渣0.5‑2%、含铬污泥20‑40%、海泥3‑15%、粘结剂0.5‑0.8%。同时还提供其相应的制备方法。本发明利用煤炉渣、焦油渣、铬泥、海泥来生产陶粒，海泥为发泡物质，焦油渣为还原剂，利用焦油渣中残余碳在高温下不完全燃烧生成CO形成还原气氛，使含铬污泥中Cr（Ⅵ）被还原为Cr（Ⅲ），从而使含铬污泥解毒，使得含铬污泥安全处置，减少了固体废弃物的占地面积，节约资源、变废为宝，避免环境污染，本发明的陶粒主要由固体废弃物制成，极大降低了生产成本，具有良好的经济效益和社会效益；本发明制备陶粒的方法，生产工艺简单、过程可控制，重现性好。
Chromium-containing sludge ceramsite and preparation method thereof
一种含铬污泥陶粒及其制备方法
YANG XIAODONG (author) / XU MINGWEI (author) / XU WENBIN (author) / LEI ZHONGMING (author) / GUO DONG (author)
2021-06-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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