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A platform for research: civil engineering, architecture and urbanism
Cement Filling Material for Co-solidifying Arsenic and Preparation Method Thereof
The invention discloses a mine cement filling material for co-solidifying arsenious hazardous wastes and a preparation method thereof, and belongs to environment protection fields, such as mine cement filling, solid waste resource utilization and synergetic disposal of the arsenious hazardous wastes. The preparation method comprises the following steps: milling the required raw materials, i.e., blast furnace slag, steel slag and desulfurization gypsum, with 0.01%-1% of moisture content according to the dry basis weight percentage of 45%-50% of the blast furnace slag, 10%-30% of the steel slag and 10%-15% of the desulfurization gypsum, milling independently or milling by mixed powder until the specific surface area is 200-600 m<2>/Kg, adding 10%-35% of calcium hydroxide, uniformly mixing to obtain a cementing agent, and drying the arsenious hazardous wastes until the moisture content is 0.01%-1%, according to the weight ratio of the cementing agent/aggregate of 1/4-1/8, the weight ratio of the arsenious hazardous wastes/(cementing agent + aggregate) of 1/1000-1/100, adding 0%-1% of water reducing agent, until the mass fraction of slurry is 65%-86%, and uniformly stirring to obtain the qualified mine cement filling material. The preparation method provided by the invention has the characteristics of simple and easy operation, low energy consumption, low cost, no new solid waste generation, less environmental pollution, and environmental protection.
Cement Filling Material for Co-solidifying Arsenic and Preparation Method Thereof
The invention discloses a mine cement filling material for co-solidifying arsenious hazardous wastes and a preparation method thereof, and belongs to environment protection fields, such as mine cement filling, solid waste resource utilization and synergetic disposal of the arsenious hazardous wastes. The preparation method comprises the following steps: milling the required raw materials, i.e., blast furnace slag, steel slag and desulfurization gypsum, with 0.01%-1% of moisture content according to the dry basis weight percentage of 45%-50% of the blast furnace slag, 10%-30% of the steel slag and 10%-15% of the desulfurization gypsum, milling independently or milling by mixed powder until the specific surface area is 200-600 m<2>/Kg, adding 10%-35% of calcium hydroxide, uniformly mixing to obtain a cementing agent, and drying the arsenious hazardous wastes until the moisture content is 0.01%-1%, according to the weight ratio of the cementing agent/aggregate of 1/4-1/8, the weight ratio of the arsenious hazardous wastes/(cementing agent + aggregate) of 1/1000-1/100, adding 0%-1% of water reducing agent, until the mass fraction of slurry is 65%-86%, and uniformly stirring to obtain the qualified mine cement filling material. The preparation method provided by the invention has the characteristics of simple and easy operation, low energy consumption, low cost, no new solid waste generation, less environmental pollution, and environmental protection.
Cement Filling Material for Co-solidifying Arsenic and Preparation Method Thereof
2021-03-18
Patent
Electronic Resource
English
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