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Study on Knelson Concentrator Gravity Separation of a Polymetallic Ore Bearing Gold
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Study on Knelson Concentrator Gravity Separation of a Polymetallic Ore Bearing Gold
Application of spiral chute spiral chute also known as spiral chute separator is a kind of gravity separation beneficiation equipment for sorting finegrained materials and is widely used for the separation of tin ore tungsten ore gold ore lead ore inc ore antimony bismuth titanium etc
Mine is a typical porphyry type gold-copper deposit, with low-grade gold-bearing refractory ore. as shown in the processing result, the efficiency of recovering associated gold is very poor. In this experiment, we carry out the gravity separation experimental of the knelson concentrator, trying to provide the technical basis for improving the recovery efficiency of associated gold ore.
Copper and iron are the two main elements in the raw ore, and exist in the forms of alpha chalcocite, covelline, enargite, iron pyrite. The gangue minerals are mainly quartz, dickite, alunite and a small amount of iron oxide, etc. Gold symbiosis with other minerals closely, that is the raw ore is multi-metal gold-bearing refractory ore.
Based on the analysis of the occurrence state and distribution of gold in the overflow ore, it is found that a large part of the gold is dissociated from the raw ore, the visible gold in the overflow ore accounts for 36. It can be seen from the distribution of gold in the ore that improving the recovery of visible gold is the key to increase the recovery rate.
Taking enrichment and gold mineral scanning processes for the part of overflow ore, obtain 80 gold minerals. According to the count of grain ore size, the visible gold is mainly fine-grained grade, in which, 10 80 m account for 80, few are less than 10m. In view of the previous research, gold particles over 37 m can be recovered by gravity separation, while 10 37 m is more suitable for flotation processing. click to find more info about Fine gold recovery equipment.
The ore sample is a low-grade gold bearing refractory copper ore, in which, gold is closely associated with copper-sulfur minerals, the gold mainly in nature gold are distributed in the gaps. After the ore was dissociated, a large part of gold became granular gold, and it was difficult to achieve effective recovery by flotation, so the Knelson is used to pre-recover the granular gold.
The Knelson centrifugal concentrator is often arranged at the outlet of the ball mill, we analysis the ball mill discharge firstly, to know the metal distribution of different particle sizes. As can be seen in the above table, the major particle size is 0.045mm-0.6mm, with 75.26 of productivity, and the distribution rate of gold is up to 83.76. The recovery result of this grain size will directly affect the recovery effect of the final gold metal.
2.2.3 Enrichment time Experimental conditions pulp density 30, ore feeding speed 1 kgmin, gravity value is 40G, fluidization water 5.0 L min, enrichment time have 20 minutes, 25 minutes,30 minutes and 35 minutes. With the increase of enrichment time, the grade of concentrate increases gradually, and the recovery rate increases at first and then decreases. When the enrichment time is 30 min, the maximum value is 68.23, and the concentration level is 114.63.
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Gravity separation and Ore Beneficiation IspatGuru. Oct 12, 2018 Fig 1 Effect of centrifugal force on gravity force. Separation of the ore particle by gravity is dependent on two factors namely i settling rate of the particles, and ii difference in specific gravity when compared against the medium in which they are being separated, this gives differential settling rate and has been ...
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Mining Gravity Separatornbspis a kind of centrifugal concentration equipment. It can be used in alluvial river placer gold mining, hard rock mining to recover the natural gold, replacing amalgamation. It is also used to recover gold from the old tailings.nbsp
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