Abstract
AbstractA converter slagging agent was prepared using converter precipitator dust and oxide scale as raw materials and bentonite, calcium oxide, and soluble glass as binders. The influence of different binders on the strength of the converter slagging agent was studied. The optimum ratio of bentonite, calcium oxide, and sodium silicate was determined by orthogonal experiments. The chemical composition, strength, moisture content, alkalinity, and other indicators of the prepared converter slagging agent met the requirements for converter smelting. The drop intensity of the green pellet was 3.7 times, and the compressive strength of the dry pellet could reach 988.72 N/m2. Therefore, the sustainable utilization of converter precipitator dust and oxide scale could be realized by the preparation of a converter slagging agent.
Highlights
A large amount of solid waste is generated in the production of iron and steel, and the waste pollutes the environment while occupying land resources [1,2,3,4,5]
The converter slagging agent was prepared by the cold pressing method with converter precipitator dust and oxide scale as raw materials, and bentonite, calcium oxide, and sodium silicate were used as binders
Considering the actual production process, the strength of the converter slagging agent should meet the requirement that the drop intensity of green pellets should be more than two times, and the compressive strength of dry pellets should be greater than 800 N cm−2
Summary
A large amount of solid waste is generated in the production of iron and steel, and the waste pollutes the environment while occupying land resources [1,2,3,4,5]. Each ton of steel produced with converter steelmaking is accompanied by approximately 15–20 kg of precipitator dust [10,11,12]. The scale is a layered iron oxide formed by the oxidation of the surface of the slab or billet during the production of continuous casting and steel rolling. It is approximately 1–2% of steel output. The converter slagging agent was prepared by the cold pressing method with converter precipitator dust and oxide scale as raw materials, and bentonite, calcium oxide, and sodium silicate were used as binders. This research explored a suitable method for the sustainable utilization of converter precipitator dust and oxide scale
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