摘要
Stainless steelmaking dust makes an environmental problem in the disposal or landfills and has been assigned as a hazardous waste by various government regulatory agencies because it leaches heavy metals to the groundwater or rainwater in the concentrations exceeding the environmental guidelines for solid waste disposal.Solidification of the dust is to stabilize the hazardous components into amorphous silica-alumina-based clays.Various mixtures of stainless steelmaking dust and clay were investigated and the softening temperatures of these mixtures were measured.The results indicate that the mixture of stainless steelmaking dust and clay additive with 1:1 ratio has the lowest softening temperature of 1 100 ℃.The clinkers can pass the TCLP leaching test after being thermally treated at the softening temperature for 15 min.A thermal process for the solidification of stainless steelmaking dust with typical clay is developed and the product is desirable for the production of bricks or disposal and landfill.
Stainless steelmaking dust makes an environmental problem in the disposal or landfills and has been assigned as a hazardous waste by various government regulatory agencies because it leaches heavy metals to the groundwater or rainwater in the concentrations exceeding the environmental guidelines for solid waste disposal. Solidification of the dust is to stabilize the hazardous components into amorphous silica-alumina-based clays. Various mixtures of stainless steelmaking dust and clay were investigated and the softening temperatures of these mixtures were measured. The results indicate that the mixture of stainless steelmaking dust and clay additive with 1：1 ratio has the lowest softening temperature of I 100 ℃. The clinkers can pass the TCLP leaching test after being thermally treated at the softening temperature for 15 min. A thermal process for the solidification of stainless steelmaking dust with typical clay is developed and the product is desirable for the production of bricks or disposal and landfill.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第1期202-206,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(50274073)supported by the National Natural Science Foundation of China
关键词
热凝固技术
炼钢粉尘
不锈钢
环境保护
solidification
stainless steelmaking dust
environmental protection
