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A platform for research: civil engineering, architecture and urbanism
Steel slag treatment method
The invention relates to the technical field of metallurgical solid waste treatment, in particular to a steel slag treatment method. The primary grinding particle size of the steel slag is controlled, so that the steel slag can be better carbonized in the later period; the carbonization degree of the steel slag and the consumption degree of active components are indirectly expressed and controlled by controlling the pH value of the steel slag and an aqueous solution in the steel slag carbonization process, the CO2 carbonization rate of the steel slag and the consumption rate of active substances of the steel slag are visually controlled, the reaction is stopped when the pH value is reduced to 10.0-11.0, f-CaO which can cause poor stability in the steel slag is carbonized, and the stability of the steel slag is improved. The content of the steel slag is reduced to a safe range (less than or equal to 4%), and meanwhile, insufficient carbonization degree and excessive carbonization of the steel slag are avoided, so that more Ca < 2 + > which can generate hydration when the steel slag is subsequently applied to a cementing material can be retained on the basis of ensuring that the stability of the steel slag is qualified; the carbonized steel slag is subjected to secondary grinding, and the particle size of the carbonized steel slag is further required, so that the finally treated steel slag has good mechanical activity when being used as a building adhesive material.
本发明涉及冶金固废处理技术领域，具体是一种钢渣处理方法。通过对钢渣初磨粒径进行控制，以便后期钢渣能够进行较好的碳化；通过钢渣碳化过程中钢渣及水溶液pH值的控制来间接表达并控制钢渣的碳化程度及活性组分的消耗程度，对钢渣CO2碳化率、钢渣活性物质的消耗率进行直观的把控，在pH值降低到10.0‑11.0即停止反应，使钢渣中会造成安定性不良的f‑CaO碳化，其含量含量降低到安全范围(≦4％)，同时避免钢渣碳化程度不足及过度碳化，使钢渣在保证安定性合格的基础上，还能保留更多后续应用于胶凝材料时可发生水化作用的Ca2+；将碳化后钢渣进行二次粉磨，对其粒径进一步要求，使得最终处理后的钢渣作为建筑胶材时具备良好的力学活性。
Steel slag treatment method
The invention relates to the technical field of metallurgical solid waste treatment, in particular to a steel slag treatment method. The primary grinding particle size of the steel slag is controlled, so that the steel slag can be better carbonized in the later period; the carbonization degree of the steel slag and the consumption degree of active components are indirectly expressed and controlled by controlling the pH value of the steel slag and an aqueous solution in the steel slag carbonization process, the CO2 carbonization rate of the steel slag and the consumption rate of active substances of the steel slag are visually controlled, the reaction is stopped when the pH value is reduced to 10.0-11.0, f-CaO which can cause poor stability in the steel slag is carbonized, and the stability of the steel slag is improved. The content of the steel slag is reduced to a safe range (less than or equal to 4%), and meanwhile, insufficient carbonization degree and excessive carbonization of the steel slag are avoided, so that more Ca < 2 + > which can generate hydration when the steel slag is subsequently applied to a cementing material can be retained on the basis of ensuring that the stability of the steel slag is qualified; the carbonized steel slag is subjected to secondary grinding, and the particle size of the carbonized steel slag is further required, so that the finally treated steel slag has good mechanical activity when being used as a building adhesive material.
本发明涉及冶金固废处理技术领域，具体是一种钢渣处理方法。通过对钢渣初磨粒径进行控制，以便后期钢渣能够进行较好的碳化；通过钢渣碳化过程中钢渣及水溶液pH值的控制来间接表达并控制钢渣的碳化程度及活性组分的消耗程度，对钢渣CO2碳化率、钢渣活性物质的消耗率进行直观的把控，在pH值降低到10.0‑11.0即停止反应，使钢渣中会造成安定性不良的f‑CaO碳化，其含量含量降低到安全范围(≦4％)，同时避免钢渣碳化程度不足及过度碳化，使钢渣在保证安定性合格的基础上，还能保留更多后续应用于胶凝材料时可发生水化作用的Ca2+；将碳化后钢渣进行二次粉磨，对其粒径进一步要求，使得最终处理后的钢渣作为建筑胶材时具备良好的力学活性。
Steel slag treatment method
一种钢渣处理方法
XIE HUI (author) / SHUAI HAILE (author) / LI YANG (author) / YANG YUAN (author)
2023-11-10
Patent
Electronic Resource
Chinese
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