The average process index obtained by fresh water and two-stage flotation with circulating water is shown in Table 2 .
The use of full-circulating water does not reduce the gold recovery rate when selecting ore. After several consecutive tests, the salt composition of the circulating water did not change much, and the content of harmful impurities in the water was within the range of the maximum allowable concentration.
To reduce the number should be a flotation concentrate smelting process, we attempt to press the two-stage flotation process is obtained, and the combined concentrate in the amount of arsenic-containing unqualified, arsenic is separated into a concentrate pyrite And pyrite concentrate. In the presence of iron sulfate (
In order to remove arsenic, the combined flotation concentrate needs to be 600~
The calcination time of the calcination was 72 hours. The gold recovery rate into the solution was 82.55% (for ore) and the recovery of work was 89.41% . Due to the low gold recovery rate, in situ cyanide baking is very uneconomical.
In order to process the above ore, it is recommended to use two-stage flotation, then vacuum pyrolysis to treat arsenic, and the slag is sent to the smelting plant for treatment.
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