High-carbonate iron ore composite modification inhibitor and preparation and use methods thereof
A compound modification and carbonate technology, which is applied in the improvement of process efficiency, solid separation, flotation, etc.
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Embodiment 1
[0029] The high-carbonate iron ore mixed magnetic concentrate of Liaoning Donganshan Sintering Plant was used as the flotation raw material. The particle size analysis result was -0.038mm, accounting for 85.22%. The TFe grade in the ore sample was 50.64%, and the SiO 2 The content is 30.32%, and the content of iron-containing carbonate minerals is 8.19%. The flow chart of the reverse flotation process of high carbonate mixed magnetic concentrate is as follows: figure 2 As shown, the specific implementation steps are as follows:
[0030]1) Carry out causticizing treatment of branched chain glucan in alkaline solution, and then in the reaction kettle, the mass ratio of branched chain dextran to propylene oxide and chloroacetic acid is 4:1 and 3:1 respectively. Mix, control the reaction temperature to 65°C, take it out after 3 hours of reaction, neutralize the modified dextran, precipitate, filter, and dry it for later use;
[0031] 2) After mixing polyacrylamide and sodium hy...
Embodiment 2
[0037] The processing raw materials and method are basically the same as in Example 1, the difference is that the modification of branched glucan and polyacrylamide in steps 1) and 2) is not carried out, and branched dextran is directly used in step 3) , polyacrylamide instead of modified dextran and modified polyacrylamide respectively.
[0038] Adopting the method of this embodiment to finally obtain the concentrate iron grade is 65.2%, and the iron recovery rate is 84.56%. As can be seen from the preliminary accounting results of technical and economic indicators, compared with Example 1, the flotation concentrate iron grade reduces by 1.3 percentage points, and the iron The recovery rate decreased by 5.94 percentage points.
Embodiment 5
[0044] The high-carbonate iron ore mixed magnetic concentrate of Liaoning Dong'anshan Sintering Plant was used as the flotation raw material. The particle size analysis result showed that -0.038mm accounted for 88.36%. The TFe grade in the ore sample was 54.21%, and the SiO 2 The content is 35.32%, and the iron-containing carbonate mineral content is 10.58%. The flow chart of the reverse flotation process of high carbonate mixed magnetic concentrate is as follows: figure 2 As shown, the specific implementation steps are as follows:
[0045] 1) Causticizing the branched dextran in an alkaline solution, and then carrying out the branched glucan, propylene oxide and chloroacetic acid at a mass ratio of 5:1 and 4.5:1 in the reaction kettle, respectively. Mix, control the reaction temperature to 70°C, take it out after 5 hours of reaction, neutralize the modified dextran, precipitate, filter, and dry it for later use;
[0046] 2) After mixing polyacrylamide and sodium hydroxide ...
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