A kind of method for strengthening chalcopyrite normal pressure organic halogenation leaching while grinding
A technology of leaching and chalcopyrite while grinding is applied in the direction of improving process efficiency, which can solve the problems of slow bioleaching efficiency, inorganic chloride corrosion, and large roasting leaching pollution, so as to reduce surface passivation and achieve high leaching rate. , The effect of low corrosion of equipment
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Embodiment 1
[0032] The chalcopyrite raw material is chalcopyrite, which contains 34% Cu by mass percentage; the chalcopyrite raw material is crushed and then ground for one time to make coarse ore powder, wherein the part with a particle size of ≤1mm accounts for more than 90% of the total mass;
[0033] Mix the coarse ore powder with organic halogenating agent, solubilizer and stabilizer evenly to make a mixed material; the mass ratio of coarse ore powder, organic halogenating agent, solubilizer and stabilizer is 60:30:5:5;
[0034] The organic halogenating agent is sodium trichloroisocyanurate; the solubilizer is sodium dodecyl diphenyl ether disulfonate; the stabilizer is acetonitrile;
[0035] Put the mixed material in the reaction kettle, add water to prepare a slurry with a mass concentration of 40%, and adjust the pH value of the slurry to 0; add grinding media to the slurry, the diameter of the grinding medium is 1mm, and the grinding medium and the mixed powder The mass ratio of ...
Embodiment 2
[0040] Method is with embodiment 1, and difference is:
[0041] (1) chalcopyrite raw material is chalcopyrite concentrate, containing Cu 29% by mass percentage;
[0042] (2) The mass ratio of coarse ore powder, organic halogenating agent, solubilizer and stabilizer is 8:90:1:1; the organic halogenating agent is an equal mass mixture of sodium dichloroisocyanurate and sodium dichloroisocyanurate; The solubilizer is an equal mass mixture of sodium lauryl sulfate and sodium tripolyphosphate; the stabilizer is an equal mass mixture of potassium bromide and sodium borate;
[0043] (3) The mass concentration of the pulp is 1%; the pH value is adjusted to 5; the diameter of the grinding medium is 50mm, and the mass ratio of the grinding medium to the mixed powder is 100:1; the stirring speed is 1000rpm, the temperature is 20°C, and the time is 180min ;
[0044](4) The recovery rate of copper in the leaching solution is 93.9%;
[0045] Add 1M ferric chloride and 1M sulfuric acid to...
Embodiment 3
[0047] Method is with embodiment 1, and difference is:
[0048] (1) chalcopyrite raw material is copper-gold concentrate, containing Cu 16% by mass percentage;
[0049] (2) The mass ratio of coarse ore powder, organic halogenating agent, solubilizer and stabilizer is 1:79:10:10; the organic halogenating agent is 1,3-dibromo-5,5-dimethylhydantoin and 3-bromo-1-chloro-5,5-dimethylhydantoin at a mass ratio of 1:2; the solubilizer is urea; the stabilizer is sulfamic acid;
[0050] (3) The mass concentration of the pulp is 25%; the pH value is adjusted to 3; the diameter of the grinding medium is 30mm, and the mass ratio of the grinding medium to the mixed powder is 5:1; the stirring speed is 800rpm, the temperature is 60°C, and the time is 120min ;
[0051] (4) The recovery rate of copper in the leaching solution is 90.6%;
[0052] Add 1M ferric chloride and 1M sulfuric acid to the above coarse ore powder in a conventional manner, and stir and leach at 60°C for 180min without g...
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