Experimental Study on Preparation of Ceramsite with High Silicon Iron Tailings

WU Junquan; MA Jing; WANG Yingling; QIAO Fulong; LI Jing; HU Wenbin; ZHAO Yingjie; DUAN Mengzhan; WANG Jiangwei

doi:10.13779/j.cnki.issn1001-0076.2020.06.018

2020 Vol. 40, No. 6

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Article navigation > Conservation and Utilization of Mineral Resources > 2020 > 40(6): 126-132

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WU Junquan, MA Jing, WANG Yingling, QIAO Fulong, LI Jing, HU Wenbin, ZHAO Yingjie, DUAN Mengzhan, WANG Jiangwei. Experimental Study on Preparation of Ceramsite with High Silicon Iron Tailings[J]. Conservation and Utilization of Mineral Resources, 2020, 40(6): 126-132. doi: 10.13779/j.cnki.issn1001-0076.2020.06.018

Citation:

WU Junquan, MA Jing, WANG Yingling, QIAO Fulong, LI Jing, HU Wenbin, ZHAO Yingjie, DUAN Mengzhan, WANG Jiangwei. Experimental Study on Preparation of Ceramsite with High Silicon Iron Tailings[J]. Conservation and Utilization of Mineral Resources, 2020, 40(6): 126-132. doi: 10.13779/j.cnki.issn1001-0076.2020.06.018

Experimental Study on Preparation of Ceramsite with High Silicon Iron Tailings

1.
School of Resources and Materials, Northeastern University at Qinhuangdao Branch, Qinhuangdao 066004, China
2.
Qinhuangdao Laboratory of Resources Cleaner Conversion and Efficient Utilization, Qinhuangdao 066004, China

More Information

Corresponding author: WANG Yingling, yinglingwang09@163.com

Received Date: 19 November 2020

Publish Date: 25 December 2020

Abstract

Abstract

The high strength lightweight ceramsite was prepared by taking iron tailings as aggregate, and fly ash as corrector. In order to determine the sintering temperature range of the ceramsite, the thermal reaction process of the raw material was tested by TG-DSC and XRD. A group of orthogonal test is arranged and carried out to study the effect of composition ratio, sintering temperature, heating rate in high temperature zone and holding time on the bulk density, apparent density, water absorption and cylinder compression strength of ceramsite. The formulation and manufacturing process of permeable brick were optimized. The results showed that the density of ceramsite was greatly affected by composition of raw materials, while the sintering temperature had a greater impact on the water absorption and cylinder compressive strength. The high strength lightweight ceramsite with the bulk density of 888.20 kg/m³, the apparent density of 1 907.14 kg/m³, the cylinder compressive strength of 8.34 MPa, and 1h water absorption rate of 5.04% could satisfy the GB/T 17431.1—2010 standard, when the content of Al₂O₃ in the pellets was 17%, and the temperature was raised to 1 000 ℃ at 10 ℃/min, and then to 1 210 ℃ at 25 ℃/min, and the temperature was kept for 30 minutes. It has provided a new route for the comprehensive utilization of iron tailings.
- iron tailings /
- fly ash /
- high strength lightweight ceramsite /
- orthogonal test /
- bulk density /
- cylinder compression strength

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References

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