Method for preparing iron ore concentrate and manganese chemical products by carrying out dual reduction on refractory ferro-manganese symbiotic lean ore
A technology for chemical products and iron concentrates, applied in chemical instruments and methods, improvement of process efficiency, solid separation, etc., can solve problems such as processing and utilization, achieve high efficiency, low cost, and improve the recovery rate of concentrates
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example 1
[0020] Example 1: Iron concentrate and manganese sulfate produced from iron-manganese symbiotic lean ore in Qujing, Yunnan.
[0021] 1. Analysis of main components of raw materials:
[0022] element Al Ca Fe Mg mn Pb Cu Si content(%) 8.31 8.23 18.11 8.13 15.61 0.12 0.01 10.31
[0023] Second, the main process:
[0024] Material grinding, material mixing, reduction reaction, closed cooling, two-stage wet strong magnetic separation, sulfuric acid manganese leaching of tailings, purification and removal of impurities, concentration and crystallization.
[0025] Three, the main process conditions:
[0026] 1. Material grinding:
[0027] (1) Dry grinding.
[0028] (2) Iron-manganese ore-120 mesh ≥ 95%, limestone-120 mesh ≥ 95% (chaff does not need to be ground).
[0029] 2. Restoration conditions:
[0030] (1) Material ratio: ore: chaff: limestone = 1:0.15:0.008.
[0031] (2) Reduction temperature: 500°C±10°C.
[0032] (3) Reduction...
example 2
[0057] Example 2: Double reduction separation of iron and manganese symbiotic lean ore in Honghe area, Yunnan to produce iron concentrate and manganese carbonate.
[0058] 1. Analysis of main components of raw materials:
[0059] element Al Ca Fe Mg mn Pb W Si content(%) 2.14 10.83 17.89 6.31 16.31 0.03 2.32 13.42
[0060] Second, the main process:
[0061] Material grinding, material mixing, reduction reaction, closed cooling, two-stage wet strong magnetic separation, sulfuric acid manganese leaching of tailings, purification and impurity removal, carbonization manganese precipitation, dry packaging.
[0062] Three, the main process conditions:
[0063] 1. Material grinding:
[0064] (1) Dry grinding.
[0065] (2) Iron-manganese ore-120 mesh ≥ 95%, limestone-120 mesh ≥ 95%.
[0066] (3) Tobacco rod-L0.2~0.4mm≥95%.
[0067] 2. Restoration conditions:
[0068] (1) Ratio of materials: ore: tobacco rod powder: limestone = 1:0.2:0.006....
example 3
[0097] Example 3: Double reduction separation of iron and manganese symbiotic lean ore in Dali, Yunnan to produce iron concentrate and manganese dioxide.
[0098] 1. Analysis of main components of raw materials:
[0099] element Al Ca Fe Mg mn Pb Cu Si content(%) 4.36 6.18 18.81 8.44 17.88 0.011 0.031 12.13
[0100] Second, the main process:
[0101] Material grinding, material mixing, reduction reaction, closed cooling, two-stage wet strong magnetic separation, sulfuric acid manganese leaching of tailings, purification and impurity removal, carbonization manganese precipitation, air heat drying, and medium temperature pyrolysis.
[0102] Three, the main process conditions:
[0103] 1. Material grinding:
[0104] (1) Dry grinding.
[0105] (2) Iron-manganese ore and limestone-120 mesh ≥ 95%, (sawdust does not need to be ground).
[0106] 2. Restoration conditions:
[0107] (1) Ratio of materials: ore: sawdust: limestone = 1:0.20:...
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