Test on Mineral Processing of a Low Grade Phosphate of Mabian in Sichuan Province
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摘要:
这是是一篇矿物加工工程领域的论文。对四川马边某低品位镁质磷矿开展了化学组分、矿物组成及嵌布特征研究，矿石主要有用矿物为胶磷矿，主要脉石矿物为白云石，有用矿物和脉石嵌布粒度较细，宜采用单一反浮选法实现其经济利用。经一系列条件实验确定矿石适宜磨矿细度为-0.074 mm 65%，浮选工艺为一段粗选、两段精选、两段扫选、中矿顺次返回，以文中浮选闭路工艺流程及参数，在原矿含P2O5 18.44%、MgO 9.52%条件下，获得了产率43.97%，P2O5品位33.86%，MgO品位1.35%，P2O5回收率81.84%的磷精矿，工艺成本较低，可使低品位磷矿得到较好经济利用。
Abstract:This is an article in the field of mineral processing engineering. Chemical components, mineral compositions and embedded features of the low grade phosphate had been studied. The main valuable mineral in the ore was collophanite and the main gangue mineral was dolomite. The disseminated extents between valuable mineral and gangue mineral were very small so single reverse flotation method had been used in the article which could make the ore utilize by low lowcost. Through many tests and the beneficiation technological processes of the low grade phosphate had been ascertained that the grinding fineness was 65% below 0.074 mm, and once rougher flotation, twice well-chosen and twice scavenging, and the phosphorus ore concentrate had been gained which yield was 43.97%, P2O5 grade 33.86%, MgO grade 1.35% and the recovery of P2O5 was 81.84% when the raw ore’s P2O5 grade was 18.44% and MgO grade was 9.52%. In this way the cost was low and the low grade phosphate could be utilized effectively.
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Key words:
- Mineral processing engineering /
- Low grade /
- Phosphate ore /
- Test on mineral processing
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表 1 矿样化学成分分析结果 /%
Table 1. Chemical composition analysis results of the sample
P2O5 MgO CaO SiO2 Fe2O3 Al2O3 F CO2 Loss 酸不溶物 18.19 9.38 38.83 3.96 0.57 1.62 1.67 23.44 23.33 3.95 
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表 2 开路实验结果
Table 2. Results of circuit-opening test
产品名称 产率 /% 品位/% 回收率/% P2O5 MgO P2O5 MgO 精矿1 42.11 34.06 1.20 77.53 5.47 精矿2 3.18 27.94 2.89 4.80 0.99 精矿1+精矿2 45.29 33.63 1.32 82.33 6.46 尾矿1 39.15 3.89 17.00 8.24 72.03 尾矿2 15.56 11.21 12.77 9.43 21.51 尾矿1+尾矿2 54.71 5.98 15.80 17.67 93.54 原 矿 100.00 18.50 9.24 100.00 100.00
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表 3 闭路实验结果
Table 3. Results of closed circuit tests
产品名称 产率/% 品位/% 回收率/% P2O5 MgO P2O5 MgO 精矿 43.97 33.86 1.35 81.84 6.31 尾矿 56.03 5.90 15.68 18.16 93.69 原 矿 100.00 18.19 9.38 100.00 100.00
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