Flotation process flow

Gold beneficiation plant processes a wide range of gold ore beneficiation process for rock gold ore, and is often used to process gold-bearing sulfide minerals with high floatability. The flotation process can enrich the gold to the sulfide minerals to a large extent, and the tailings can be directly discarded, and the beneficiation cost is low. 80% of the rock gold mines in my country are selected by this process. The flotation process mainly includes several stages such as dosing, stirring, aeration, and foaming.

Application field

The gold flotation process is suitable for processing gold-bearing sulfide ore with finer gold particles and good floatability. In the flotation process, sulfide ore is used as a carrier of gold to be enriched into sulfide concentrate. Flotation method can also be used To deal with polymetallic gold-bearing sulfide ore and carbonaceous ore. In addition, for "difficult ores" that cannot be directly processed by amalgamation method or cyanidation method, a combined process including flotation is also required for processing.

Process introduction

The flotation of gold minerals generally adopts a one-stage grinding-flotation process, and a staged grinding-flotation process can be adopted for ores with uneven particle size in Khenpo. A stage of grinding-flotation-flotation process is generally adopted in my country to realize the enrichment of useful minerals.

Grinding fineness requirements of gold mines

The requirement of gold ore grinding fineness, generally speaking, only the dissociation of the sulfide ore monomer is required for the gold wrapped in sulfide minerals, but the grinding fineness of the gold that is connected with the gangue needs to reach the gold monomer. Dissociate. At the same time, the grinding fineness of a certain mineral is determined by experiments.

Gold mine flotation process slurry concentration requirements

The principle of gold flotation is: flotation of large-density, coarse-grained minerals often use thicker slurry; on the contrary, when flotation of small-density, fine-grained and sludge, use a thinner slurry, and choose a thicker one for coarse flotation. The pulp can ensure a higher recovery rate, and the concentration of the beneficiation is relatively dilute, which is beneficial to improve the quality of the concentrate.

Other process conditions

In addition to the fineness of grinding, the process conditions that affect gold flotation also include slurry concentration, dosage of medicament, aeration amount, flotation time, etc., which need to be determined by experiments.

For the flotation of gold ore containing a single gold mineral, with uniform particle size distribution and relatively coarse particle size, a one-stage grinding and flotation process is usually used. For gold mines where gold is unevenly distributed in coarse and fine grains, mercury plates are usually placed in the grinding and classification circuit before flotation or re-selection equipment is used to pre-recover particulate gold. The above two processes are mostly used in gold concentrators. For gold mines with complex ore properties, the flotation process is also more complicated. For example, the stage grinding stage separation process and the mud sand separation process are all applied in practice. For the flotation of gold-bearing polymetallic ore, the process is complex and diversified. Gold is usually concentrated in a certain mineral concentrate, and gold is sold as an associated mineral.

Flotation equipment is mainly various types of flotation machines, and new flotation columns and other flotation equipment are also used in individual gold mines.

XJK flotation machine is a traditional self-suction flotation machine, JJF, SF, BF flotation machine is a new self-suction flotation machine

The aerated mechanical agitation flotation machine is currently competitive flotation equipment. This type of equipment has the advantages of simple structure, air filling and uniform dispersion, low impeller speed, low energy consumption, and light wear. At the same time, this type of equipment also enables beneficiation Large-scale equipment becomes possible, among which XCF/KYF flotation machine currently has a single tank volume of up to 600m3.

Gold ore beneficiation process-the gold ore gravity separation process uses different proportions of materials and different sedimentation speeds in the medium to carry out stratified separation. Generally, in placer gold mines, gold mostly exists in the form of single natural gold, which has a large difference in density with gangue. The use of gravity separation of gold has a good effect and high economic benefits.

There are many reselection methods, such as jig reselection, shaker reselection, chute reselection, spiral reselection, centrifugal reselection and wind reselection. In gold ore beneficiation, the commonly used methods of gravity separation are jigging, shaking table and chute.