铁尾矿粉煤灰免烧陶粒的制备与物理力学特性

张瑞; 鲁建国; 姚华彦; 李运泽; 卢俊雄; 刘帅廷

doi:10.3969/j.issn.1000-6532.2024.06.004

铁尾矿粉煤灰免烧陶粒的制备与物理力学特性

合肥工业大学　土木与水利工程学院，安徽　合肥　230009

基金项目: 安徽省重点研究与开发计划项目（202004a07020027）；省级大学生创新训练计划（S202110359102）

详细信息

作者简介: 张瑞（2000-），男，本科，研究方向为土木工程

通讯作者: 姚华彦（1979-），男，副教授，硕士生导师，研究方向为固废资源化利用与岩土工程

中图分类号: TD989

收稿日期: 2022-03-14

刊出日期: 2024-12-25

Preparation and Physico-mechanics Properties of Non-sintered Ceramsite from Iron Tailing Fly Ash

College of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

More Information

Corresponding author: YAO Huayan, yaohuayan@hfut.edu.cn

Received Date: 14 March 2022

Publish Date: 25 December 2024

摘要

摘要:
这是一篇矿物材料领域的论文。以铁尾矿和粉煤灰为主要原料制备免烧陶粒，并研究了不同配比实验条件下铁尾矿掺量对制得免烧陶粒的堆积密度、表观密度、吸水率、强度的影响，结果表明：随着铁尾矿掺量的增加，陶粒的堆积密度和表观密度逐渐增大，吸水率逐渐减小，强度呈现先减小后增加的趋势。通过铁尾矿制备成陶粒的方式可以大幅提高铁尾矿利用率，所制得的免烧陶粒具有实际生产应用价值，可为铁尾矿固体废弃物资源的综合化利用提供新途径，有较好的经济效益和环保效益。
- 矿物材料 /
- 铁尾矿 /
- 免烧陶粒 /
- 粉煤灰 /
- 掺量 /
- 实验
Abstract:
This is an article in the field of mineral materials. Non-sintered ceramsite were prepared using iron tailings and fly ash as the main raw materials, and the effects of iron tailings proportion on the stacking density, apparent density, water absorption, and strength of non-sintered ceramsite were studied at different material mix ratio. The results showed that with the increase of iron tailings proportion, the stacking and apparent density of ceramsite gradually increased, while the water absorption gradually decreased. The strength shows a trend of decreasing first and then increasing. The method of preparing ceramsite from iron tailings can significantly improve the utilization rate of iron tailings. The non-sintered ceramsite production have practical application value and can provide a new way for the comprehensive utilization of iron tailings with good economic and environmental benefits.
- Mineral materials /
- Iron tailings /
- Non-sintered ceramsite /
- Fly ash /
- Proportion /
- Test

HTML全文

图 1 测定单颗陶粒颗粒强度示意

Figure 1.

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图 2 堆积密度和铁尾矿占比的关系

Figure 2.

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图 3 表观密度和铁尾矿占比的关系

Figure 3.

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图 4 吸水率和铁尾矿占比的关系

Figure 4.

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图 5 颗粒强度和铁尾矿占比的关系

Figure 5.

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图 6 软化系数和铁尾矿占比的关系

Figure 6.

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表 1 粉煤灰主要化学成分/%

Table 1. Chemical components of fly ash

SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	SO₃	LOI
55.50	27.94	6.06	5.24	1.22	0.50	2.00

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表 2 纳米四氧化三铁物理特性参数

Table 2. Physical properties of Nano-iron oxide

平均粒径/ mm	纯度/ %	比表面积/ (m²/g)	堆积密度/ (g/cm³)	密度/ ( g/cm³)	外观
100	>99	66	0.84	4.98	黑色粉末

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表 3 原料配合比/g

Table 3. Material mix ratio

编号	铁尾矿	粉煤灰	石膏	水泥	生石灰	速溶硅酸钠	纳米四氧化三铁
1	300	2 400	60	110	60	15	100
2	600	2 100	60	110	60	15	100
3	900	1 800	60	110	60	15	100
4	1 200	1 500	60	110	60	15	100
5	1 500	1 200	60	110	60	15	100

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表 4 免烧铁尾矿陶粒实验成果

Table 4. Test results of iron tailings ceramsite

铁尾矿:粉煤灰	颗粒强度/MPa	吸水率/%	堆积密度/（kg/m³）	表观密度/（kg/m³）	软化系数
1:9	1.212 0	27.43	745.95	1 369.13	0.712
2:8	1.138 1	25.79	854.11	1 391.44	0.685
3:7	0.769 0	23.44	901.47	1 401.17	0.708
4:6	0.603 7	22.32	1 010.99	1 439.15	0.820
5:5	0.725 5	22.04	1 105.73	1 481.37	0.723

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