Process for recycling gold from high-arsenic and high-sulfur difficultly treated gold ore
A gold recovery technology for refractory gold ore, applied in the field of gold recovery, can solve the problems of low concentrate grade, low recovery rate, and inability to obtain qualified gold concentrate, and achieve the goal of improving the gold concentrate grade and increasing the utilization rate of sulfur Effect
Inactive Publication Date: 2012-07-11
有研资源环境技术研究院(北京)有限公司
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After this process, the grade and recovery rate of the obtained concentrate are low, and when the grade of pyrite is high and a large amount of gold is distributed in the pyrite, it is impossible to obtain qualified gold concentrate
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[0019] The new process was applied to a high arsenic and high sulfur refractory gold mine. The metal minerals in a high-arsenic and high-sulfur gold mine in Anhui are mainly pyrite (partially fragmented and altered into colloidal pyrite), pyrrhotite, arsenopyrite, etc. A small amount of sphalerite, sphalerite, etc. Galena, chalcopyrite and other metal sulfides; there are few gangue minerals, mainly carbonate minerals calcite and dolomite, followed by clay minerals, altered minerals chlorite and sericite, and a small amount of quartz and feldspar Wait. The gold part is natural gold in the form of fine particles, most of which are closely symbiotic with arsenopyrite, colloidal pyrite and gangue, and are extremely difficult to dissociate. Generally speaking, the ore contains high arsenic and sulfur content, and gold is difficult to dissociate, which is a typical refractory gold ore.
[0020] (1) As shown in the attached figure, the raw ore is first graded to -0.1mm by grinding,...
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The invention relates to a process for recycling gold from a high-arsenic and high-sulfur difficultly treated gold ore. The process comprises the following steps of: separating natural gold and arsenopyrite from a raw ore through an ore grinding and grading table to obtain gold concentrate 1, tailings 1 or tailings 2; wherein when the content of sulfur in the tailings is low, the tailings 1 are obtained, processing the tailings 1, and directly conveying the tailings 1 to a tailing warehouse; when the content of sulfur in the tailings is high, the tailings 2 are obtained, performing ore grinding floatation on the tailings 2 to obtain sulfur concentrate and the tailings 1; further performing sulfur fine grinding floatation on the ore in the table, wherein the floatation tailings are sulfur concentrate, and the flotation concentrate is gold concentrate 2 or gold-containing sulfur concentrate; when the gold-containing grade of the flotation concentrate is relatively high, obtaining the gold concentrate 2; and when the gold-containing grade of the flotation concentrate is relatively low, obtaining the gold-containing sulfur concentrate, and after ore grinding and grading, further collecting through the table to obtain the gold concentrate 2, wherein the tailings are sulfur concentrate. The grade of the gold concentrate is greatly improved in a processing way that repeated selectionand floatation are combined in the new process; and a large amount of arsenic is collected into the gold concentrate simultaneously, so the utilization rate of sulfur is improved. When an ore sample of which the pyrite grade is relatively high and gold with a large amount is distributed in the pyrite is treated, qualified gold concentrate with certain amount can be still obtained.
Description
technical field [0001] The invention relates to a process for recovering gold from arsenic-containing and sulfur-containing refractory gold ores, especially when treating high-arsenic and high-sulfur gold ores, and the gold content in each component of the original ore is relatively high, and has a good effect . Background technique [0002] The traditional high-arsenic and high-sulfur gold ore treatment process is ore crushing and grinding. According to the material composition and the distribution of gold in each component, flotation or gravity separation is used for treatment. After this process, the grade and recovery rate of the obtained concentrate are low, and when the grade of pyrite is high and the gold is distributed in a large amount in the pyrite, no qualified gold concentrate can be obtained. Therefore, it is necessary to provide a new process. Contents of the invention [0003] The purpose of the present invention is to provide a process for recovering gold...
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IPC IPC(8): B03B7/00C22B11/00
Inventor 李岩徐政宋永胜周桂英李文娟
Owner 有研资源环境技术研究院(北京)有限公司
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