Research on forming experiment of Panzhihua pyrite residue pellets with carbon-containing
-
摘要: 为分离回收攀枝花硫酸渣中的铁资源，以攀枝花硫酸渣为原料，煤粉为碳源，PVA为粘结剂，采用正交试验和单因素优化试验探索了粘结剂用量、含水量、压强、粒度组成等因素对硫酸渣内配碳球团机械强度性能的影响。研究表明：压强对硫酸渣内配碳球团强度性能的影响最大，其次为粘结剂用量、含水量，粒度组成的影响最小。试验获得了硫酸渣内配碳球团成型的适宜工艺为：粘结剂用量0.4%、含水量9%、压强10 MPa。此条件下球团的抗压强度为185.4 N/球、落下强度为42.5次/球，达到球团工业生产中对机械强度的要求。该研究成果将为硫酸渣中铁资源的还原分离回收提供参考，也为攀枝花钒钛磁铁矿资源综合利用率的提高奠定一定的基础。Abstract: In order to separate and recover iron resources of Panzhihua pyrite residue, using Panzhihua pyrite residue as raw material, pulverized coal as carbon source, and polyvinyl alcohol (PVA) as binding agent, the influences of the content of polyvinyl alcohol, the water content, the pressure and the particle size composition on the mechanical strength properties of pyrite residue carbon pellets were studied in this paper by orthogonal experiments and single factor optimization experiments. The research results show that the pressure has the greatest influence on the strength properties of pyrite residue carbon pellets, followed by the content of polyvinyl alcohol and water content, and finally the particle size composition. The appropriate process for forming pyrite residue carbon pellets was obtained including the content of polyvinyl alcohol of 0.4%, the water content of 9%, the pressure of 10 MPa, and below 88 μm particle size of 70%. Under these conditions, the compressive strength of pellets was 185.4 N/pellet and the falling strength was 42.5 times/pellet, which meet the requirements of mechanical strength in pellets industrial production. The research results will provide reference for the reduction, separation and recovery of iron resources from pyrite residue, and also lay a certain foundation for the improvement of the comprehensive utilization rate of Panzhihua vanadium titano-magnetite resources.
-
Key words:
- pyrite residue /
- carbon-containing pellet /
- forming pressure /
- mechanical strength
-
图 2 硫酸渣内配碳球团成型工艺流程
Figure 2. The forming flow chart of pyrite residue carbon pellets with carbon-containing
图 3 粘结剂用量对球团强度的影响
Figure 3. Effect of polyvinyl alcohol content on the pellet strength
表 1 硫酸渣的主要化学组成
Table 1. Main composition of pyrite residue
% TFe SiO2 Fe2O3 FeO MgO Na2O K2O P S Co Ni 52.28 3.98 69.54 4.63 0.18 0.19 0.083 0.025 0.55 0.028 0.01 
下载: 导出CSV
表 2 正交试验因素及水平
Table 2. Factor levels in orthogonal test
因素A B C D 粘结剂用量/% 含水量/% 压强/ MPa 粒度组成/% 1 0.1 7 4 65 2 0.2 8 8 70 3 0.3 9 12 75
下载: 导出CSV
表 3 L9 34正交试验极差分析
Table 3. L9 34 Orthogonal design and range analysis results
试验号 A B C D 落下强度/次 抗压强度/N 1 0.1 7 4 65 6 45 2 0.1 8 8 70 9 58 3 0.1 9 12 75 11 73 4 0.2 7 8 75 10 69 5 0.2 8 12 65 15 81 6 0.2 9 4 70 6 64 7 0.3 7 12 70 17 62 8 0.3 8 4 75 9 59 9 0.3 9 8 65 19 66 K1 8.75 11 7 13.33 落下强度分析 K2 10.33 11 12.67 10.67 K3 15 12 14.33 10 R 6.25 1 7.33 3.33 K1 58.67 58.67 56 64 抗压强度分析 K2 71.33 66 64.33 61.33 K3 62.33 67.64 72 67 R 12.66 8.97 16 5.67
下载: 导出CSV
-
[1] Lv Yanan, Chen Dong, Tang Jianguo. Effect of boron bearing additives on performance of pyrite cinder pellets[J]. Sintering and Pelletizing, 2018,43(4):45−48. (吕亚男, 陈栋, 唐建国, 等. 含硼添加剂对硫酸渣球团性能的影响[J]. 烧结球团, 2018,43(4):45−48. [2] Wang Jihua, Gao Jianming. Preparation of powdered iron using titanium white waste acid and pyrite cinder[J]. Hydrometallurgy of China, 2020,39(3):237−240. (王吉华, 高建明. 用钛白废酸和硫酸渣制备铁精粉[J]. 湿法冶金, 2020,39(3):237−240. doi: 10.13355/j.cnki.sfyj.2020.03.013 [3] Zuo Haoen, Wen Jiankan, Cui Xinglan, et al. Review of research progress on preparation of high-quality iron concentrate from pyrite cinder by desulphurization[J]. Chinese Journal of Engineering, 2018,40(1):1−8. (左豪恩, 温建康, 崔兴兰, 等. 硫酸渣脱硫制备高品质铁精矿研究进展[J]. 工程科学学报, 2018,40(1):1−8. [4] Zhang Hanquan, Lu Manman, Hu Dingguo. Iron concentration and sulfur reduction on sulphuric acid drag by magnetic roasting-magnetic separation[J]. Journal of Wuhan Institute of Technology, 2012,34(10):15−18. (张汉泉, 路漫漫, 胡定国. 硫酸渣磁化焙烧-磁选提铁降硫[J]. 武汉工程大学学报, 2012,34(10):15−18. doi: 10.3969/j.issn.1674-2869.2012.10.004 [5] Chen Mingjun, Ding Zhan, Li Jie, et al. Experimental study on beneficiation of low-grade pyrite cinder with high content of sulfur using hydrothermal alkali melting process[J]. Industrial Minerals & Processing, 2021,50(6):41−45. (陈明军, 丁湛, 李颉, 等. 高硫低品位硫酸渣“热液碱熔分”试验研究[J]. 化工矿物与加工, 2021,50(6):41−45. [6] Wang Jiawei, Li Anjing, Wang Haifeng. Research on effect of enriching iron from pyrite cinder with sodium hydroxide by roasting process[J]. Multipurpose Utilization of Mineral Resources, 2016,(5):88−91. (王家伟, 李安静, 王海峰. 硫酸渣加碱焙烧过程中富铁效果研究[J]. 矿产综合利用, 2016,(5):88−91. doi: 10.3969/j.issn.1000-6532.2016.05.021 [7] Wang Xue, Mao Zhizhong, Li Yanbing, et al. Investigation on the optimization of calcining process parameters and the cyclic reaction performance of pyrite cinder[J]. Journal of Engineering for Thermal Energy and Power, 2020,35(11):94−99. (王学, 毛志忠, 李延兵, 等. 硫酸渣煅烧工艺参数优化及循环反应性能研究[J]. 热能动力工程, 2020,35(11):94−99. doi: 10.16146/j.cnki.rndlgc.2020.11.014 [8] Li Junhan. Research on the molding of sulfur cobalt concentrate pellets containing carbon[J]. Iron Steel Vanadium Titanium, 2017,38(5):78−83. (李俊翰. 硫钴精矿含碳球团压力成型试验研究[J]. 钢铁钒钛, 2017,38(5):78−83. doi: 10.7513/j.issn.1004-7638.2017.05.015 -
点击查看大图
图(5) / 表(3)
计量
- 文章访问数: 79
- HTML全文浏览量: 27
- PDF下载量: 20
- 被引次数: 0
