Method for refining copper from pyrite cinder through rotary kiln
A technology of pyrite slag and rotary kiln, applied in the field of metallurgy, can solve problems such as environmental pollution, and achieve the effect of low energy consumption
Inactive Publication Date: 2019-01-25
王显权
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for extracting copper in a pyrite slag rotary kiln to solve the environmental pollution caused by the cyanide gold extraction process in the prior art
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Embodiment 1
[0017] Example 1 as figure 1 with figure 2 Shown: the method for extracting lead in a pyrite slag rotary kiln comprises the following steps:
[0018] Step 1. Rotary kiln roasting: Rotary kiln roasting works continuously. First, the pyrite slag is mixed with calcium chloride and calcium hydroxide, and then it is ground to make it reach the fineness of fine-grained gold, that is, the abrasive material 85 % of the particle size is less than 0.043mm, breaking the joint form of pyrite slag, so as to facilitate the later treatment, and then put the ground material into the disc granulator to make a particle size of 10-15mm Dry the rigid pellets at 250°C to make the water content ≤ 0.5% and stir and roast. The temperature of the kiln head in the kiln is > 1150°C. At the same time, an oxidation and chlorination environment is provided for roasting and chlorination of the rotary kiln. / min, rotating and roasting for 110-140 minutes to obtain flue gas and roasted balls. The roasted b...
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The invention discloses a method for refining copper from pyrite cinder through a rotary kiln in the technical field of metallurgy. The method comprises the following steps that 1, rotary kiln roasting: pyrite cinder is mixed with calcium chloride and calcium hydroxide; the mixture is put into a rotary kiln; oxygen and chlorine are introduced for roasting; after spray dust cooling washing, lead gold silver mud is obtained for use; after wet liquid is replaced by iron scurf, copper gold sliver mud is obtained for use; 2, copper production from copper gold sliver mud: a, the copper gold sliver mud generated in the first step is put into a reflection furnace to be roasted and oxidized to obtain copper roasted sand; sulfuric acid is added into the first reaction kettle; after the reaction, discharging is performed; vacuum filtering suction is performed to obtain copper sulfate liquid; the copper sulfate liquid is put into the second reaction kettle; iron chip is added for replacement; filter cake is obtained; the filter cake is filtered away; iron chips are removed to obtain sponge copper mud; the sponge copper mud is dried into copper powder; after melting casting, copper ingots are obtained. The copper is separated from the pyrite cinder; 810t of 99.0-percent copper ingots can be recovered from three hundred thousand tons of pyrite cinder; the copper yield can reach 89.1 percent;meanwhile, gold and silver can also be separated from the separated gold silver mud.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for refining copper in a rotary kiln with pyrite slag. Background technique [0002] The main mineral composition in pyrite is: hematite (including maghemite), magnetite, trace limonite, pyrite, pyrrhotite, chalcopyrite, etc.; gangue minerals are mainly quartz , a small or trace amount of mica, pyroxene, etc. Pyrite flotation will produce a large amount of refractory low-grade lead-containing, copper-containing, gold-containing and silver-iron ores. In the slag obtained after oxidative roasting, desulfurization and arsenic, the content of lead is 1-3g / t, copper The content is 5-30g / t, the gold content is 1-8g / t, and the silver is 30-90g / t, part of which exists in the form of monomer or conjoined gold, and part of it exists in oxides and silicates in the state of intercalation , In sulfide. Pyrite slag is the industrial waste slag that is discharged from...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C22B1/216C22B7/00C22B11/00C22B15/00
CPCC22B1/216C22B7/006C22B7/007C22B11/044C22B15/0091Y02P10/20
Inventor 王显权
Owner 王显权