PRELIMINARY STUDY ON PREPARATION PROCESS OF HIGH-PERFORMANCE CERAMSITE FROM IRON ORE TAILINGS AND COAL GANGUE

ZHANG Wuju; MA Wenzhuo; PAN Jian; ZHU Deqing; YANG Congcong; GUO Zhengqi

doi:10.13205/j.hjgc.202406011

Volume 42 Issue 6

Jun. 2024

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ZHANG Wuju, MA Wenzhuo, PAN Jian, ZHU Deqing, YANG Congcong, GUO Zhengqi. PRELIMINARY STUDY ON PREPARATION PROCESS OF HIGH-PERFORMANCE CERAMSITE FROM IRON ORE TAILINGS AND COAL GANGUE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 94-102. doi: 10.13205/j.hjgc.202406011

Citation:

ZHANG Wuju, MA Wenzhuo, PAN Jian, ZHU Deqing, YANG Congcong, GUO Zhengqi. PRELIMINARY STUDY ON PREPARATION PROCESS OF HIGH-PERFORMANCE CERAMSITE FROM IRON ORE TAILINGS AND COAL GANGUE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 94-102. doi: 10.13205/j.hjgc.202406011

Citation:

ZHANG Wuju, MA Wenzhuo, PAN Jian, ZHU Deqing, YANG Congcong, GUO Zhengqi. PRELIMINARY STUDY ON PREPARATION PROCESS OF HIGH-PERFORMANCE CERAMSITE FROM IRON ORE TAILINGS AND COAL GANGUE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 94-102. doi: 10.13205/j.hjgc.202406011

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PRELIMINARY STUDY ON PREPARATION PROCESS OF HIGH-PERFORMANCE CERAMSITE FROM IRON ORE TAILINGS AND COAL GANGUE

doi: 10.13205/j.hjgc.202406011

ZHANG Wuju^1,2,
MA Wenzhuo^1
,,
PAN Jian^{1,3
,},
ZHU Deqing^1,3,
YANG Congcong^1,3,
GUO Zhengqi^1,3

1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
2. Anhui Huaihai New Material Co., Ltd., Huaibei 235047, China;
3. Low Carbon and Hydrogen Metallurgy Research Center, Central South University, Changsha 410083, China

Received Date: 2023-05-25
Available Online: 2024-07-11

Abstract

Abstract

In this study, iron ore tailings and coal gangue were used as raw materials to prepare high-strength and lightweight ceramsite by referring to the methods and equipment of iron ore pelletization in ferrous metallurgy. The influence of pelleting parameters on the properties of the pellet, and the influence of roasting parameters on the properties of ceramsite were investigated, and the structure-function relationship among the phase composition, structure, and performance of the ceramsite was explored. The results showed that the composition structure of 45% iron ore tailings and 55% coal gangue was calculated based on Riley’s three-phase diagram, and the green pellet was prepared under the conditions of 60% of particle size below 0.074 mm, 8 min pelletizing duration, and 10.5% moisture. After drying, the dried pellet was roasted at 1175 ℃ for 25 min to prepare ceramsite. The bulk density, apparent density, 1 h water absorption, and cylinder compressive strength was 859 kg/m³, 1705 kg/m³, 8.0%, and 6.7 MPa, which meet the requirements of various indexes of high-strength and light-weight ceramsite. The main phases of the ceramsite are quartz, feldspar, and hematite, which can provide strength for ceramsite. The well-developed pores in the ceramsite are beneficial to reducing bulk density, and apparent density, but the over-developed pores of the outer layer harm the cylinder compression strength.
- iron ore tailings,
- coal gangue,
- high-strength and light-weight ceramsite,
- pellet

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References(25)

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