Process for comprehensively recycling copper and iron through ore phase restructuring of copper smelting molten slag
A technology for copper smelting slag and molten slag, applied in the field of industrial waste slag resource utilization, can solve the problems of large fluctuation of flotation index, iron utilization rate of less than 1%, poor adaptability of copper smelting slag, etc., to achieve effective separation and recovery, The effect of reducing fayalite formation and tailings stockpile
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[0024] The composite additive of the present invention adopts the following preparation method: after drying the quicklime, manganese monoxide, pyrite, chalcopyrite and iron oxide, then weighing and mixing according to the mass ratio to obtain Compound Additives.
[0025] In the following examples, the crushing and grinding is to roughly crush the modified slag to -5mm, and then crush it to -1mm by high-pressure roller mill, and then grind it finely in a ball mill.
Example Embodiment
[0028] Example 1
[0029] The copper smelting slag diluted by the electric furnace has an iron grade of 39.10% and a copper grade of 0.83%. According to 20% of the quality of the copper smelting slag, compound additives (45% quicklime, 15% manganese monoxide, 20% iron tetroxide, pyrite) are added. 10% ore, 10% chalcopyrite) for slag modification. After the modified slag is slowly cooled, crushed and ground, the copper coarse concentrate and flotation tailings are obtained by flotation, and the flotation tailings are subjected to wet magnetic separation. , get iron concentrate and magnetic separation tailings. Modification is carried out under the conditions of temperature 1250℃, cooling rate 1.5℃ / min, and cooling end temperature 900℃. The modified slag is subjected to flotation copper conditions: grinding fineness -0.045mm90.2%; butyl xanthate 200g / t ; The dosage of inhibitor is 3.6kg / t; under the condition of magnetic separation intensity of 0.17T, the copper rough concentra...
Example Embodiment
[0030] Example 2
[0031] The iron grade of the copper smelting slag diluted by the electric furnace is 39.10%, and the copper grade is 0.83%. According to 18% of the quality of the copper smelting slag, compound additives (50% quicklime, 10% manganese monoxide, 15% iron trioxide, pyrite) are added. 15% ore, 10% chalcopyrite) for slag modification, after the modified slag is slowly cooled, crushed and ground, the copper coarse concentrate and flotation tailings are obtained by flotation, and the flotation tailings are subjected to wet magnetic separation , get iron concentrate and magnetic separation tailings. The modification is carried out under the conditions of melting temperature 1250℃, cooling rate 1.5℃ / min, and cooling end temperature 900℃. The modified slag is subjected to flotation copper conditions: grinding fineness -0.045mm90%; butyl xanthate 200g / t; The dosage of inhibitor is 3.0kg / t; under the condition of magnetic separation intensity of 0.17T, the copper rough...
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