What are the gold ore beneficiation equipment？

Gold ore beneficiation equipment mainly includes crushing equipment (jaw crusher), grinding equipment (ball mill), classifier, mixing tank, chute flotation machine, etc.

Gold mining and dressing: The types of gold deposits are mainly divided into two categories: one is vein gold deposits, most of which are distributed in high mountain areas and formed by geological processes. Vein gold deposits are also called mountain gold deposits and endogenous gold deposits; The other type is placer gold ore. After the mountain gold mine is exposed to the ground, after long-term weathering and denudation, it is broken into gold particles, gold flakes, and gold powder, which are then transported by wind and running water, and then gathered under the separation of running water. , deposited on the riverside, lakeside, and coast to form alluvial, diluvial or coastal placer gold deposits. After weathering and denudation of some mountain gold deposits, clastic products accumulate in situ, forming residual placer gold deposits; if they accumulate along slopes, slope deposit type placer gold deposits are formed. Placer gold deposits are also known as exogenous gold deposits, and their metallogenic ages can be in the Paleozoic, Mesozoic, Tertiary, Quaternary or modern. In addition, there is a kind of associated gold mine, which has low gold content, and is often recovered and comprehensively utilized in the process of non-ferrous metal mines.

crushing and grinding

Mineral processing equipment (jaw crusher) is mostly used for coarse crushing, standard cone crusher is used for medium crushing, and short-head cone crusher and double-roll crusher are used for fine crushing. Most of the medium and small gold dressing plants adopt two-stage and one closed-circuit crushing process, and large-scale gold dressing plants adopt three-stage and one closed-circuit crushing process. In order to increase output and equipment utilization factor, ore concentrators generally follow the principle of more crushing and less grinding to reduce the particle size of the ore entering the mill.

re-election

Gravity beneficiation is a method of ore beneficiation based on mineral density difference, which occupies an important position in contemporary beneficiation methods. The main equipment used are chute, shaker, jig and short cone cyclone.

Flotation of gold ore beneficiation equipment

80% of gold beneficiation plants in my country use flotation for gold beneficiation, and most of the concentrates produced are sent to non-ferrous smelters for processing. Due to the increasing development of gold extraction by cyanidation method and the enterprise's aim to improve economic efficiency and reduce the loss of concentrate transportation, the product structure has undergone major changes in recent years. And other problems, forcing the mine to deal with it on the spot) promotes the greater development of the flotation process, which occupies a very important position in the gold production. At present, 98 kinds of gold minerals and gold-bearing minerals have been discovered, of which only 47 are common, and only more than 10 kinds of minerals are directly used by industry. There are nearly 38 kinds of gold-bearing minerals in my country, and the gold content of gold mines is generally relatively small. Gravity separation and flotation are commonly used beneficiation methods in gold mines. Most of the gold mines in my country use the above methods to extract gold. The equipment has been greatly improved.

According to the structure state and gold content of gold in minerals, gold deposit minerals can be divided into three categories: gold minerals, gold-bearing minerals and gold-bearing minerals. The so-called independent gold minerals refer to gold produced in the form of gold minerals and gold-bearing minerals. It is the most important form of gold in nature and the main object of industrial development and utilization.

The current mainstream gold beneficiation process is generally crushed by a crusher, then crushed by a ball mill, and then the concentrate and tailings are extracted through gravity separation and flotation processes, and then through chemical methods, and finally smelted, and its products finally become finished products gold. Gold ore beneficiation process can be understood as:

The raw ore is crushed in the first stage and then enters the double-layer vibrating screen for screening. The upper layer product is re-crushed and then undergoes the second stage crushing together with the middle layer product. The second stage crushed product is returned to combine the first stage crushed product for screening.

The final product after sieving is ground through the first ball mill and forms a closed-circuit grinding with the grading mechanism. The grading overflow is classified by the cyclone and then enters the second-stage ball mill for regrinding, and then forms a closed-circuit grinding with the cyclone .

The cyclone overflow is firstly subjected to priority flotation, and its foam product is subjected to secondary selection and third selection to finally become a concentrate product. After priority flotation, the tailings undergo primary roughing, primary selection, secondary selection, The separation process of three-time selection and one-time selection, the tailings of one-time selection and the foam products of one-time selection enter the cyclone for re-classification and re-separation, and the second selection and one-time selection constitute closed-circuit separation The third selection and the second selection constitute a closed-circuit selection.

crushing and grinding

The crushing process mostly uses jaw crushers for coarse crushing, standard cone crushers for medium crushing, and fine crushing for short-head cone crushers and double-roll crushers. Most of the medium and small gold dressing plants adopt two-stage and one closed-circuit crushing process, and large-scale gold dressing plants adopt three-stage and one closed-circuit crushing process. In order to increase output and equipment utilization factor, ore concentrators generally follow the principle of more crushing and less grinding to reduce the particle size of the ore entering the mill.

re-election

The gravity beneficiation method is a method of beneficiating ore according to the difference in mineral density. The main equipment used is a chute, a shaking table, a jig and a short cone cyclone.

Flotation

The concentrate produced by the flotation method is mostly sent to non-ferrous smelters for processing. Due to the increasing development of gold extraction by cyanidation and the enterprises adopting in-situ treatment in order to improve economic efficiency and reduce the loss of concentrate transportation, the flotation process has developed greatly and occupies a very important position in gold production.

Gold ore beneficiation method - chemical separation

The current chemical separation methods mainly include amalgamation gold extraction process and cyanidation gold extraction process. The amalgamation gold extraction process is an ancient gold extraction process, which is simple and economical, and is suitable for the recovery of coarse-grained monomer gold, but it has great pollution to the environment, and is gradually being used by gravity separation, flotation and cyanidation Superseded by the Fatikin process.

The cyanide gold extraction process includes: cyanide leaching, washing and filtering of leached pulp, extraction of gold from cyanide solution or cyanide pulp, and smelting of finished products.

Gold ore beneficiation method - smelting

Smelting is the last process of extracting gold. Smelting can be divided into rough refining and refining. Gold smelting has developed rapidly in our country, and most of them use the traditional crucible method to produce alloy gold, or send it to non-ferrous metal smelters for processing and refining finished gold. the

Gold ore beneficiation method - heap leaching

In the gold ore resources, the amount of low-grade oxidized ore occupies a certain proportion. It is economically uneconomical to use the conventional cyanidation method to extract gold from this kind of ore, but the heap leaching production process still has economic benefits.