低品位硫铁矿烧渣生产复合硅酸盐水泥工艺优化

李勇辉; 先元华; 陈德霞; 钟意; 吴修洁

doi:10.3969/j.issn.1000-6532.2023.03.013

低品位硫铁矿烧渣生产复合硅酸盐水泥工艺优化

1.
宜宾职业技术学院，四川　宜宾　644000

2.
“工业固态废弃物土木工程综合开发利用”四川省高校重点实验室，四川　攀枝花　617000

3.
重庆市经贸中等专业学校，重庆　402160

基金项目: 工业固态废弃物土木工程综合开发利用四川省高校重点实验室开放基金项目(SC-FQWLY201710)

详细信息

作者简介: 李勇辉（1984-），男，硕士，工程师。研究方向为污染控制与资源化利用

中图分类号: TD989

收稿日期: 2021-03-21

刊出日期: 2023-06-25

Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder

1.
Yibin Vocational & Technical College, Yibin, Sichuan, China

2.
Sichuan Province Key Laboratory of Higher Education Institutions for Comprehensive Development and Utilization of Industrial Solid Waste in Civil Engineering, Panzhihua, Sichuan, China

3.
Chongqing Economy and Trade Secondary Vocational School, Chongqing, China

Received Date: 21 March 2021

Publish Date: 25 June 2023

摘要

摘要:
这是一篇矿物材料领域的论文。为因地制宜寻求低品位硫铁矿烧渣的综合利用途径，解决硫铁矿烧渣大量堆存的问题，并缓解土壤及水质污染，进行了低品位硫铁矿烧渣生产复合硅酸盐水泥工艺优化研究。利用硫铁矿烧渣具有铁含量高的特点，作为外加剂，将其掺入水泥熟料、脱硫石膏、粉煤灰等，混合磨细，制备复合硅酸盐水泥，以强度为指标，确定适宜的硫铁矿烧渣掺量。通过对不同硫铁矿烧渣掺量制备的水泥试块进行物理性能检测，利用正交实验对工艺条件进行优化。结果表明，较佳工艺条件为，水泥熟料掺量为55%，钙硅比为2.5，灰渣比为1，水灰比为0.4，在此条件下，实验制得的水泥28 d抗压强度为43.9 MPa，强度等级为42.5。
- 硫铁矿烧渣 /
- 复合硅酸盐水泥 /
- 固体废物资源化 /
- 正交实验 /
- 协同利用 /
- 矿物材料
Abstract:
This is a paper in the field of mineral materials. In order to seek for a new feasible way to utilize low-grade pyrite cinder under local conditions, to solve bottleneck problems of large reserves, and to relieve soil and water pollution, a research on the process optimization on preparation of composite portland cement with low-grade pyrite cinder was conducted. Pyrite cinder as a special kind of industrial solid waste with higher iron content, was used as additive, and was incorporated with portland cement clinker, flue gas desulfurization gypsum and fly ash to prepare composite portland cement. Their efficacy was compared by testing the compressive strength and flexural strength of composite portland cement, based on the analysis of physical indices, and then orthogonal tests were carried out to optimize the preparation. The results showed that the optimum preparation conditions were: mass fraction of portland cement clinker of 55%, Ca to Si ratio of 2.5, fly ash to pyrite cinder ratio of 1.0, and water to material ratio of 0.4. And then, 28-day compressive strength was 43.9 MPa. According to the national standard named as Common Portland Cement, the cement mark can reach the level of P·C 42.5.
- Pyrite cinder /
- Composite portland cement /
- Recycling of solid wastes /
- Orthogonal test /
- Synergistic utilization of waste slag /
- Mineral materials

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表 1 实验材料化学组成/%

Table 1. Result of analysis for chemical composition of materials in experiment

名称	Al₂O₃	CaO	Fe₂O₃	K₂O	MgO	Na₂O	P₂O₅	SiO₂	SO₃	TiO₂
硫铁矿烧渣	35.50	4.73	7.63	0.26	0.24	0.13	0.20	43.65	2.51	4.43
水泥熟料	6.36	61.93	3.58	1.13	1.36	0.28	0.09	22.97	1.19	0.31
脱硫石膏	0.23	48.90	0.21	0.04	1.24	0.07	0.01	2.54	46.40	0.02
粉煤灰	21.90	5.32	16.40	1.51	0.65	0.43	0.11	48.70	1.99	2.52
石灰石粉	2.53	51.25	0.43	0.22	0.09	0.15	0.01	4.51	0.01	0.09

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表 2 因素水平

Table 2. Factors and levels

水平	（A）水泥熟料掺量/%	（B）钙硅比	（C）灰渣比	（D）水灰比
1	55	1.5	3	0.3
2	65	2.0	2	0.4
3	75	2.5	1	0.5

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表 3 实验数据

Table 3. Experimental data

实验号	列号													28 d抗压强度/MPa
	1	2	3	4	5	6	7	8	9	10	11	12	13
	A	B	(A×B)₁	(A×B)₂	C	(B×D)₂	空列	(B×C)₁	D	空列	(B×C)₂	(B×D)₁	空列
1	55	1.5	1	1	3	1	1	1	0.3	1	1	1	1	35.8
2	55	1.5	1	1	2	2	2	2	0.4	2	2	2	2	39.9
3	55	1.5	1	1	1	3	3	3	0.5	3	3	3	3	37.3
4	55	2	2	2	3	1	1	2	0.4	2	3	3	3	43.1
5	55	2	2	2	2	2	2	3	0.5	3	1	1	1	42.2
6	55	2	2	2	1	3	3	1	0.3	1	2	2	2	38.1
7	55	2.5	3	3	3	1	1	3	0.5	3	2	2	2	43.8
8	55	2.5	3	3	2	2	2	1	0.3	1	3	3	3	42.5
9	55	2.5	3	3	1	3	3	2	0.4	2	1	1	1	43.9
10	65	1.5	2	3	3	2	3	1	0.4	3	1	2	3	41.4
11	65	1.5	2	3	2	3	1	2	0.5	1	2	3	1	40.3
12	65	1.5	2	3	1	1	2	3	0.3	2	3	1	2	37.9
13	65	2	3	1	3	2	3	2	0.5	1	3	1	2	46.4
14	65	2	3	1	2	3	1	3	0.3	2	1	2	3	44.5
15	65	2	3	1	1	1	2	1	0.4	3	2	3	1	45.1
16	65	2.5	1	2	3	2	3	3	0.3	2	2	3	1	45.5
17	65	2.5	1	2	2	3	1	1	0.4	3	3	1	2	45.8
18	65	2.5	1	2	1	1	2	2	0.5	1	1	2	3	44.2
19	75	1.5	3	2	3	3	2	1	0.5	2	1	3	2	41.7
20	75	1.5	3	2	2	1	3	2	0.3	3	2	1	3	40.3
21	75	1.5	3	2	1	2	1	3	0.4	1	3	2	1	42.1
22	75	2	1	3	3	3	2	2	0.3	3	3	2	1	46.9
23	75	2	1	3	2	1	3	3	0.4	1	1	3	2	48.5
24	75	2	1	3	1	2	1	1	0.5	2	2	1	3	47.4
25	75	2.5	2	1	3	3	2	3	0.4	1	2	1	3	46.9
26	75	2.5	2	1	2	1	3	1	0.5	2	3	2	1	45.9
27	75	2.5	2	1	1	2	1	2	0.3	3	1	3	2	44.8

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表 4 实验数据直观分析

Table 4. Intuitionistic analysis for experimental data

水平	A	B	C	D	(A×B)₁	(A×B)₂	备注
K₁	366.60	356.70	391.50	376.30	391.30	386.60	其他交互作用影响相对较小可忽略
K₂	391.10	402.20	389.90	396.70	380.60	383.00
K₃	404.50	403.30	380.80	389.20	390.30	392.60
k₁	40.73	39.63	43.50	41.81	43.48	42.96
k₂	43.46	44.69	43.32	44.08	42.29	42.56
k₃	44.94	44.81	42.31	43.24	43.37	43.62
极差R	4.21	5.18	1.19	2.27	1.19	1.07
因素主→次	B＞A＞D＞(A×B)＞C
优方案	A₃B₃C₁D₂

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表 5 (A×B)交互作用的判别

Table 5. Discrimination for Interaction of A and B

	A₁	A₂	A₃
B₁	37.67	47.73	44.83
B₂	39.87	41.13	46.37
B₃	41.37	43.87	43.40

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表 6 实验数据方差分析

Table 6. Analysis of variance for experimental data

差异源	SS_j	df_j	MS_j	F_j	显著性	备注^[15]
A	82.0822	2	44.0248	170.48	**	F_0.05(2,6)=5.14 F_0.01(2,6)=10.92 F_0.05(4,6)=4.53 F_0.01(4,6)=9.12
B	157.1489	2	73.5559	326.39	**
C	7.4022	2	3.4515	15.37	**
D	23.6600	2	11.6515	49.14	**
A×B	12.9889	4	2.9798	13.49	**
B×C	2.3956	4	0.5989	2.49
B×D	4.2044	4	1.0511	4.37
误差e	1.4444	6	0.2407
总和	291.3267	26

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表 7 重复性实验数据

Table 7. Experimental data at different time

	1#	2#	3#	4#	5#	6#
28 d抗压强度/MPa	43.9	43.9	43.7	43.8	43.9	43.9
	43.9	43.6	43.9	43.7	43.8	43.7
	43.7	43.8	43.8	43.8	43.9	44.0
标准偏差	0.10
相对标准偏差/ %	0.24
置信区间（α=0.95）/MPa	43.82±0.05

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低品位硫铁矿烧渣生产复合硅酸盐水泥工艺优化

1. 宜宾职业技术学院，四川 宜宾 644000 2. “工业固态废弃物土木工程综合开发利用”四川省高校重点实验室 ，四川 攀枝花 617000 3. 重庆市经贸中等专业学校，重庆 402160

作者简介: 李勇辉（1984-），男，硕士，工程师。研究方向为污染控制与资源化利用

Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder

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目录

1.
宜宾职业技术学院，四川　宜宾　644000

2.
“工业固态废弃物土木工程综合开发利用”四川省高校重点实验室，四川　攀枝花　617000

3.
重庆市经贸中等专业学校，重庆　402160