高岭土伴生型石英分粒级制备光伏玻璃用石英砂

张乾伟; 吴建新; 方强; 刘小康; 杜润生; 孙凤军

doi:10.3969/j.issn.1000-6532.2023.06.002

高岭土伴生型石英分粒级制备光伏玻璃用石英砂

1.
中建材玻璃新材料研究院集团有限公司，安徽　蚌埠　233000

2.
浮法玻璃新技术国家重点实验室矿产资源研究所，安徽　蚌埠　233000

3.
兰陵县益新矿业科技有限公司，山东　临沂　277713

基金项目: 安徽省重点研发计划（202104a05020034）；安徽省科技重大专项（201903a05020002）；山东省重大科技创新工程（2019JZZY010317）

详细信息

作者简介: 张乾伟（1986-），男，博士，高级工程师，研究方向为光伏材料的研究与制备

中图分类号: TD97

收稿日期: 2021-08-03

刊出日期: 2023-12-25

Preparation of Quartz Sand for Solar Photovoltaic Glass from Quartz Associated Kaolin by Size Fraction Distribution

1.
CNBM Research Institute for Advanced Glass Materials Group Co., Ltd, Bengbu, Anhui, China

2.
State Key Laboratory for Advanced Technology of Float Glass, Mineral & Resources Institute, Bengbu, Anhui, China

3.
Lanling County Yixin Mining Technology Co., Ltd. Linyi, Shandong, China

Received Date: 03 August 2021

Publish Date: 25 December 2023

摘要

摘要:
这是一篇陶瓷及复合材料领域的论文。为助力碳中和、碳达峰目标，我国光伏玻璃需求量近年来快速增长，从而使光伏玻璃用低铁石英砂（$ {{ \omega }}_{{\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}} $≤0.010%）供应趋紧，因此高岭土伴生型石英制备低铁石英砂备受关注。高岭土伴生型石英通常可在高岭土物理选矿的尾矿中富集，以广西合浦某高岭土物理选矿尾矿为实验对象，研究了分粒级选矿提纯对高岭土伴生型石英制备低铁石英砂的影响规律。结果表明，高岭土伴生型石英矿中+2 mm粒级的SiO₂、Al₂O₃、Fe₂O₃含量优于0.71~2 mm、0.125~0.71 mm粒级相应指标；采用磨矿-分级-磁选-浮选的分粒级选矿提纯工艺，不同粒级所得浮选石英精砂的Fe₂O₃含量均不低于0.016%；对+2 mm粒级浮选精砂分别采用硫酸、草酸与氢氟酸、草酸为酸浸介质所得石英精砂的Fe₂O₃含量分别降至0.0091%、0.0054%，满足光伏玻璃、光学玻璃用低铁石英砂的Fe₂O₃含量要求。
- 陶瓷及复合材料 /
- 高岭土 /
- 石英 /
- 分粒级 /
- 提纯
Abstract:
This is an essay in the field of ceramics and composites.To achieve carbon neutrality and peaking carbon dioxide emissions, the low-iron quartz sand(${{ \omega }}_{{\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}}$≤0.010%) supply for photovoltaic glass is tightening in China, so the preparation of low-iron quartz sand from quartz associated with kaolin gradually attracting widespread attention. However, quartz associated with kaolin can usually be enriched in the tailings of kaolin physical beneficiation. Taking quartz associated kaolin which is from tailings of kaolin physical beneficiation in Hepu, Guangxi as the object,the effect of purification by size fraction distribution on the preparation of low iron quartz sand from quartz-associated kaolin was studied in this essay. The experimental results showed that the index of SiO₂, Al₂O₃ and Fe₂O₃ content in size of 2 mm or more was better than that of 0.71~2 mm and 0.125~0.71 mm respectively, but for all different size fraction products, ferric oxide content of quartz sand is not less than 0.016% by grinding, hydraulic classification, magnetic separation and flotation. The content of quartz sand obtained by sulfuric acid and oxalic acid was 0.0091%, and the content of quartz sand obtained by hydrofluoric acid and oxalic acid was 0.0054% respectively, both of which meets the ferric oxide content requirement of low iron quartz sand for solar photovoltaic glass and optical glass.
- Ceramics and composites /
- Kaolin /
- Quartz /
- Size fraction /
- Purification

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图 1 高岭土伴生型石英的XRD

Figure 1.

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图 2 高岭土伴生型石英的粒度组成

Figure 2.

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图 3 高岭土伴生型石英分粒级选矿提纯工艺流程

Figure 3.

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图 4 不同粒级酸性浮选精砂体视显微照片

Figure 4.

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图 5 +2 mm试样酸浸提纯精砂体视显微照片

Figure 5.

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表 1 试样的主要化学成份与含量

Table 1. Main chemical composition and content of quartz associated kaolin sample

化学成分		SiO₂	Al₂O₃	Fe₂O₃	TiO₂	K₂O	Na₂O	CaO	MgO	LOI
含量/%	试样	88.46	6.01	0.61	0.066	1.92	0.056	0.029	0.078	1.47
含量/%	+0.045 mm	93.44	2.96	0.30	0.028	1.58	0.059	0.020	0.024	0.49

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表 2 不同粒级试样的化学成分与含量

Table 2. Size fraction distribution chemical composition and content of quartz associated kaolin sample

粒级/mm	SiO₂/%	Al₂O₃/%	Fe₂O₃/%
+3.2	95.98	1.65	0.16
-3.2+2	96.02	1.86	0.17
-2+1	95.31	2.10	0.24
-1+0.71	95.50	2.03	0.21
-0.71+0.125	88.78	5.33	0.45
-0.125+0.04	---	11.07	1.09
-0.045	---	23.09	2.34

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表 3 不同粒级试样强磁精砂主要化学成分

Table 3. High intensity magnetic concentrate chemical composition of different size samples

粒级/mm	化学成分/%
粒级/mm	SiO₂	Al₂O₃	Fe₂O₃	TiO₂
+2	98.27	0.71	0.035	0.014
-2+0.71	97.24	1.22	0.048	0.012
-0.71+0.125	92.54	2.98	0.077	0.016

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表 4 +2 mm试样强磁精砂浮选实验结果

Table 4. Flotation test results of high intensity magnetic concentrate from +2 mm sample

药剂量/（kg/t）		精砂指标/%
TSPS	NPD	γ_作业	SiO₂	Al₂O₃	Fe₂O₃
0.72	0.24	90.89	99.31	0.28	0.024
0.96	0.32	85.73	99.42	0.14	0.020
1.20	0.40	83.83	99.48	0.21	0.023
1.44	0.48	80.71	99.60	0.17	0.019
1.68	0.56	78.19	99.55	0.16	0.016
1.92	0.64	76.63	99.47	0.16	0.016

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表 5 -2+0.71 mm强磁精砂浮选实验结果

Table 5. Flotation test results of high intensity magnetic concentrate from -2+0.71 mm sample

药剂量/（kg/t）		精砂指标/%
TSPS	NPD	γ_作业	SiO₂	Al₂O₃	Fe₂O₃
0.48	0.16	94.30	97.95	0.79	0.041
0.72	0.24	91.72	98.68	0.58	0.037
0.96	0.32	86.78	99.07	0.31	0.033

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表 6 -0.71 mm强磁精砂浮选实验结果

Table 6. Flotation test results of high intensity magnetic concentrate from -0.71 mm sample

药剂量/（kg/t）		精砂指标/%
TSPS	NPD	γ_作业	SiO₂	Al₂O₃	Fe₂O₃
0.72	0.24	92.34	94.19	2.34	0.068
0.96	0.32	89.36	95.31	1.98	0.071
1.20	0.40	88.91	96.14	1.5	0.073
1.80	0.60	80.13	97.40	1.11	0.065
2.40	0.80	72.86	98.28	0.76	0.055

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表 7 酸浸介质与用量实验结果

Table 7. Results of acid leaching medium and dosage

酸用量/(kg/t)			精砂指标/%
硫酸	氢氟酸	草酸	γ_作业	SiO₂	Al₂O₃	Fe₂O₃
230.00	---	---	98.10	99.58	0.12	0.0094
---	100.00	---	97.61	99.68	0.097	0.0069
---	---	62.50	98.57	99.50	0.14	0.011
92.00	---	31.25	98.14	99.57	0.13	0.0091
46.00	---	31.25	98.22	99.61	0.13	0.011
---	75.00	50.00	97.38	99.78	0.067	0.0054
---	50.00	31.25	97.47	99.80	0.081	0.0057

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表 8 酸浸时间、温度实验结果

Table 8. Results of acid leaching time and temperature

实验条件			精砂指标/%
酸用量/(kg/t)	温度/℃	时间/h	γ_作业	Fe₂O₃
硫酸，92.00 草酸，31.25	100	2.0	98.30	0.010
	100	1.0	98.22	0.010
	100	0.5	98.39	0.011
	90	1.5	98.54	0.011
	80	1.5	98.40	0.011
氢氟酸，75.00 草酸，50.00	100	2.0	97.41	0.0059
	100	1.0	97.50	0.0067
	100	0.5	97.77	0.011
	90	1.5	98.38	0.0058
	80	1.5	98.00	0.0070

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参考文献(6)

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高岭土伴生型石英分粒级制备光伏玻璃用石英砂

1. 中建材玻璃新材料研究院集团有限公司，安徽 蚌埠 233000 2. 浮法玻璃新技术国家重点实验室矿产资源研究所，安徽 蚌埠 233000 3. 兰陵县益新矿业科技有限公司，山东 临沂 277713

作者简介: 张乾伟（1986-），男，博士，高级工程师，研究方向为光伏材料的研究与制备

Preparation of Quartz Sand for Solar Photovoltaic Glass from Quartz Associated Kaolin by Size Fraction Distribution

1. CNBM Research Institute for Advanced Glass Materials Group Co., Ltd, Bengbu, Anhui, China 2. State Key Laboratory for Advanced Technology of Float Glass, Mineral & Resources Institute, Bengbu, Anhui, China 3. Lanling County Yixin Mining Technology Co., Ltd. Linyi, Shandong, China

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目录

1.
中建材玻璃新材料研究院集团有限公司，安徽　蚌埠　233000

2.
浮法玻璃新技术国家重点实验室矿产资源研究所，安徽　蚌埠　233000

3.
兰陵县益新矿业科技有限公司，山东　临沂　277713

1.
CNBM Research Institute for Advanced Glass Materials Group Co., Ltd, Bengbu, Anhui, China

2.
State Key Laboratory for Advanced Technology of Float Glass, Mineral & Resources Institute, Bengbu, Anhui, China

3.
Lanling County Yixin Mining Technology Co., Ltd. Linyi, Shandong, China