Utilization of LD slag from steel industry for the preparation of MF membrane.,Journal of Environmental Management

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Utilization of LD slag from steel industry for the preparation of MF membrane.
Journal of Environmental Management ( IF 8.0 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.jenvman.2019.110060
Deepti ₁ , A Sinha ₂ , P Biswas ₂ , S Sarkar ₂ , U Bora ₁ , M K Purkait ₁

Affiliation

This work is focused on utilizing the solid waste generated from steel industry for the fabrication of porous ceramic membrane from Linz Donawitz (LD) slag. Membranes were fabricated using uniaxial method sintered at three different temperatures like 650 °C, 850 °C and 950 °C. Membranes fabricated with raw LD slag gave a highly basic filtrate. In contrast with this issue, LD slag was modified using acetic acid and CO2 purging to convert calcium oxide which is present in the slag to calcium carbonate. The membranes fabricated from modified LD slag showed a filtrate pH of 8.4 and 8.5. Porosity, pore size distribution, flexural strength, chemical stability was determined and pure water flux experiments were conducted to evaluate the efficiency of the prepared membranes. Considering the raw materials cost, the cost of the fabricated membranes was estimated in the range of 32.55-55.7 USD/m2. This work gives a potential path to develop microfiltration ceramic membrane with, high porosity and great quality in terms of strength and chemical stability. The fabricated membranes were utilized in a hybrid technique (flocculation followed by microfiltration) for the treatment of cold roll mill (CRM) wastewater generated from steel industry. Use of LD slag for the fabrication of ceramic membrane is not only an appealing option towards the commercialization of membrane, yet also great option to reduce the solid waste which is dumped to the environment.

中文翻译：

利用钢铁行业的LD渣制备MF膜。

这项工作的重点是利用钢铁行业产生的固体废物，用林茨·多纳维兹（LD）炉渣制造多孔陶瓷膜。膜是使用单轴法在650°C，850°C和950°C的三种不同温度下烧结制成的。用原始LD炉渣制成的膜具有高碱性的滤液。与该问题相反，使用乙酸和CO2吹扫对LD矿渣进行了改性，以将矿渣中存在的氧化钙转化为碳酸钙。由改性LD渣制成的膜显示出滤液的pH为8.4和8.5。测定孔隙率，孔径分布，挠曲强度，化学稳定性，并进行纯水通量实验以评估所制备膜的效率。考虑到原材料成本，人造膜的成本估计在32.55-55.7美元/平方米之间。这项工作为开发具有高孔隙率和高强度和化学稳定性的微滤陶瓷膜提供了一条潜在的途径。制成的膜用于混合技术（絮凝，然后进行微滤），用于处理钢铁行业产生的冷轧机（CRM）废水。使用LD炉渣制造陶瓷膜不仅是膜商业化的诱人选择，而且还是减少倾倒到环境中的固体废物的好选择。制成的膜用于混合技术（絮凝，然后进行微滤），用于处理钢铁行业产生的冷轧机（CRM）废水。使用LD炉渣制造陶瓷膜不仅是膜商业化的诱人选择，而且还是减少倾倒到环境中的固体废物的好选择。制成的膜用于混合技术（絮凝，然后进行微滤），用于处理钢铁行业产生的冷轧机（CRM）废水。使用LD炉渣制造陶瓷膜不仅是膜商业化的诱人选择，而且还是减少倾倒到环境中的固体废物的好选择。

更新日期：2020-01-07

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