Pyrite beneficiation process

Pyrite single gravity separation method

When choosing a pyrite beneficiation process, due to the limited recovery value of pyrite, special attention should be paid to the economic rationality of the pyrite beneficiation process. For pyrite ores with simple ore properties and relatively coarse particle size, a single gravity separation process can be considered. The advantages of a single gravity separation process are simple process, easy equipment maintenance, low energy consumption, and low mineral processing cost, but the disadvantage is that the pyrite recovery rate is low.

Pyrite single flotation method

For single pyrite ore, xanthate can be used as collector, such as ethyl xanthate, butyl xanthate, Isobutyl xanthate can effectively recover pyrite. In some cases, pyrite is oxidized to a certain extent and its floatability is weakened. It is necessary to add activators such as sulfuric acid and oxalic acid to improve the recovery rate of flotation.

Half-cooked with other valuable metal ores, sulfur is worthless:At this time, sulfur is removed as an impurity, so the pyrite needs to be suppressed during the flotation process. Thereby improving the grade of the target mineral essence. Lime, sodium sulfide, sodium humate and other inhibitors are generally used to inhibit pyrite in an alkaline flotation environment.

With other valuable metal ores, sulfur is valuable: Sulfuric acid, copper sulfate, lead nitrate, etc. can be used as activators of pyrite, and then the pyrite is Carry out flotation recovery.

Pyrite heavy-floating combined process

This process is mainly suitable for pyrite with uneven particle size or brittle and grindable minerals. The gravity separation-flotation combined process generally involves coarse grinding and classification of raw ore, using appropriate gravity separation equipment for separation to obtain a portion of the pyrite concentrate, and then flotation of the gravity-separated middlings and tailings using appropriate flotation processes. Or grind again and choose again.