Comprehensive utilization method of reverse flotation products of calcium and magnesium carbonates in mixed copper ores

A technology of calcium magnesium carbonate and mixed copper ore is applied in the field of beneficiation, which can solve the problems of not being used, the beneficiation method cannot recover copper, the problem of resource beneficiation and smelting has not been broken through, etc. Effect

Active Publication Date: 2012-09-26
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

However, the current methods of beneficiation first followed by metallurgy or first metallurgy followed by ore beneficiation cannot simultaneously solve the problem of recycling the oxygen-sulfur mixed copper ore with high binding rate and high calcium and magnesium content, resulting in high binding rate and high carbonate gangue The problem of beneficiation and smelting of oxygen-sulfur mixed copper ore resources has not been broken t

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  • Comprehensive utilization method of reverse flotation products of calcium and magnesium carbonates in mixed copper ores

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Effect test

Embodiment 1

[0023] The calcium-magnesium reverse flotation product of mixed copper ore contains 0.50% copper, mainly bound copper, 25.63% calcium oxide, 2.80% magnesium oxide, 18.56% silicon dioxide, 13.87% aluminum oxide, and 4.88% iron .

[0024] (1) Press the copper-containing calcium-magnesium carbonate product obtained from the reverse flotation of the mixed copper ore into pellets of 12-20mm, send it into the cement rotary kiln, calcinate at 1300°C for 90min, and discharge the rotary pellets Cool to room temperature after kiln.

[0025] (2) Put the calcined pellets obtained from the step (1) into a ball mill, grind the ore at a concentration of 70wt% to -200 mesh greater than 95%, put the grinding slurry into the mixing tank, add the ammonia after copper extraction Solution to pulp concentration 30wt%, add ammonia water and ammonium carbonate according to the ratio of ammonia water: ammonium carbonate=1:1, make NH 3 The concentration was kept at 1mol / L, and stirred and leached for...

Embodiment 2

[0030] The mixed copper ore calcium magnesium reverse flotation product contains 0.65% copper, mainly bound copper, 18.37% calcium oxide, 3.10% magnesium oxide, 22.75% silicon dioxide, 18.66% aluminum oxide and 8.56% iron .

[0031] (1) Press the copper-containing calcium-magnesium carbonate product obtained from the reverse flotation of the mixed copper ore into pellets of 12-20 mm, send it into the cement rotary kiln, calcinate at 1350 ° C for 80 minutes, and discharge the rotary Cool to room temperature after kiln.

[0032] (2) Put the calcined pellets obtained from the step (1) into a ball mill, grind the ore at a concentration of 75wt% to -200 mesh greater than 95%, put the grinding slurry into the mixing tank, and add ammonia after copper extraction Solution to pulp concentration 35wt%, add ammonia water and ammonium carbonate according to the ratio of ammonia water: ammonium carbonate=1:1, make NH 3 The concentration was kept at 1.5mol / L, and stirred and leached for 5...

Embodiment 3

[0037] The calcium-magnesium reverse flotation product of mixed copper ore contains 0.72% copper, mainly bound copper, 20.21% calcium oxide, 2.70% magnesium oxide, 21.87% silicon dioxide, 17.90% aluminum oxide and 9.36% iron .

[0038] (1) Press the copper-containing calcium-magnesium carbonate product obtained from the reverse flotation of the mixed copper ore into pellets of 12-20 mm, send it to the cement rotary kiln, calcinate at 1400 ° C for 60 minutes, and discharge the rotary Cool to room temperature after kiln.

[0039] (2) Put the calcined pellets obtained from step (1) into a ball mill, grind the ore at a concentration of 80wt% to -200 mesh greater than 95%, put the grinding slurry into the mixing tank, add the ammonia after copper extraction Solution to pulp concentration 40wt%, add ammonia water and ammonium carbonate according to the ratio of ammonia water: ammonium carbonate=1:1, make NH 3 The concentration was kept at 2mol / L, and stirred and leached for 30min....

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Abstract

The invention relates to a comprehensive utilization method of reverse flotation products of calcium and magnesium carbonates in mixed copper ores. The comprehensive utilization method comprises the following steps of: against the copper-containing products obtained by performing reverse flotation on the calcium and magnesium carbonates in the mixed copper ores, sequentially pressing to form pellets, calcining in a rotary kiln, grinding the ores and performing ammonia leaching to recover copper in the copper-containing products to obtain copper concentrate, and using the leached residue as ansubstitute for cement for filling ingredients in an underground goaf. According to the method disclosed by the invention, combined copper resources which can not be recovered by flotation, acid leaching and ammonia leaching can be effectively recovered, and the calcium and magnesium carbonates, silicates and aluminosilicates can be simultaneously transformed to the cement substitutes which can beused locally, so that the comprehensive utilization of the resources is realized, the filling cost in the goaf is lowered and the economic benefits are significant.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing reverse flotation products of calcium-magnesium carbonate in mixed copper ores, and belongs to the technical field of mineral processing. Background technique [0002] Copper ore resources mainly include copper sulfide and copper oxide. Copper sulfide ore accounts for 80% and copper oxide ore accounts for 20%. Due to the large amount of copper sulfide ore resources, ore dressing and recovery are relatively easy, so more than 80% of copper currently comes from copper sulfide ore resources. It is very difficult to recover copper oxide ore, and the recovery rate is low. In today's shortage of copper ore resources, the efficient use of copper oxide resources has been put on the agenda, so the recovery of copper oxide ore has also made some progress. However, in copper ore resources, the surface of copper sulfide deposits is oxidized, forming a huge amount of oxygen-sulfur mixed copper ore re...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B3/14C04B28/04C04B28/06
CPCY02P10/20
Inventor 文书明张文彬彭金辉刘殿文方建军张仪刘丹柏少军曹沁波沈海英顾晓春
Owner KUNMING UNIV OF SCI & TECH
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