Research on the Application of a New Low-Temperature Collector DGT-P in Qidashan Iron Ore Reverse Flotation Process
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摘要: 在实验室自主研发的新型组合型捕收剂DGT-P体系下，针对齐大山铁矿选矿分厂的混合磁选精矿进行了浮选实验研究，确定了较佳的药剂制度，并考查了浮选效率。在矿浆温度20 ℃、pH值=10.0、捕收剂DGT-P用量800 g/t、抑制剂玉米淀粉用量1200 g/t、不添加活化剂的条件下，经过 “一粗一精一扫”的浮选闭路实验，针对铁品位为48.22%的浮选给矿，可获得精矿铁品位69.23%及铁回收率91.52%的良好浮选指标。本研究表明新型低温捕收剂DGT-P是一种高效、选择性高的低温浮选捕收剂，该药剂的推广与应用将会有效解决我国铁矿阴离子反浮选过程中能源浪费问题。Abstract: With the newly developed compound collector DGT-P, flotation tests were carried out for the mixed magnetic separation concentrates of Qidashan iron ore. The optimum reagent regime was determined and the flotation efficiency was investigated. Under the conditions of pulp temperature 20 ℃, pH value=10.0, collector DGT-P dosage 800 g/t, inhibitor corn starch dosage 1200 g/t and no activator added, good flotation indexes of 69.23% concentrate iron grade and 91.52% iron recovery were obtained through the closed circuit process with "one coarse, one fine and one sweep". This study shows that DGT-P is an efficient and highly selective low-temperature collector, which could effectively solve the problem of energy waste in the anionic reverse flotation of iron ores in China.
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Key words:
- Flotation /
- Low-temperature collector /
- Compound collector /
- Iron ore
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图 8 闭路浮选实验数-质量流程
Figure 8. Quantity-quality flowsheet of the closed-circuit flotation test
表 1 齐大山铁矿混合磁选精矿的化学多元素分析/%
Table 1. Chemical analysis of the mixed concentrates from the magnetic separation of Qidashan iron ore
TFe FeO SiO2 Al2O3 MgO CaO 48.22 13.55 30.82 0.16 0.74 0.15 
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表 2 齐大山铁矿混合磁选精矿的铁物相分析
Table 2. Iron phase analysis of the mixed concentrates from the magnetic separation of Qidashan iron ore
名称 磁铁矿
中铁赤褐铁
矿中铁碳酸铁
中铁硫化铁
中铁硅酸铁
中铁TFe 含量/% 40.21 6.59 0.78 0.18 0.52 48.22 占有率/% 83.39 13.67 1.62 0.37 1.08 100.00
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表 3 实验中所需的化学试剂
Table 3. Chemical reagents used in the tests
试剂名称 主要成分 试剂纯度 用途 盐酸 HCl 分析纯 pH值调整剂 氢氧化钠 NaOH 分析纯 pH值调整剂 玉米淀粉 (C6H10O5)n 工业纯 抑制剂 氯化钙 CaCl2 化学纯 活化剂
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表 4 浮选开路实验结果
Table 4. Results of the open-circuit flotation test
产品名称 产率/% 铁品位/% 铁回收率/% 精矿 58.30 68.65 83.01 中矿1 6.13 55.86 7.10 中矿2 3.32 53.34 3.67 尾矿 32.25 9.30 6.22 合计 100.00 48.22 100.00
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表 5 浮选闭路实验结果
Table 5. Results of the closed-circuit flotation test
产品名称 产率/% 铁品位/% 铁回收率/% 精矿 63.74 69.23 91.52 尾矿 36.26 11.28 8.48 合计 100.00 48.22 100.00
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