gold ore processing - xinhai

gold ore processing - xinhai

Flotation is widely used in gold processing. In China, 80% rock gold is processed by flotation. Flotation process maximizes the enrichment of gold into sulfide minerals. The tailings can be directly discharged. Flotation in gold mine has low beneficiation cost.

For the gold wrapped in sulfide minerals, sulfide ore reaches monomer dissociation; but for the gold with gangue, grinding fineness should reach gold monomer dissociation. Grinding fineness of minerals is determined by test.

A gold mine in Yunan, capacity was 300t/d; the main mineral was pyrite; fine granularity of gold; the gold had close relationship with metal sulfide mineral. This plant adopted the flotation process---one roughing, two cleaning and two scavenging. But due to surface oxidation of arsenic antimony mineral, it adsorbed amount of flotation reagents, and the flotation effect was poor. So the plant authorized Xinhai to reform the process. Xinhai replaced cyclone tailings with stages grinding & flotation and flotation tailings in accordance with existing problems in production, and Xinhai also changed the number of machine and reagents rules. Finally, this plant obtained excellent indexes. The indexes comparison as follow:

The production process flow into stage flotation flowsheet, easy operation, to achieve early harvest, fast charge minerals useful higher impurity minerals; adjust the structure of flotation machine, improve the separation environment, but also improve the flotation pulp mineralization effect, the index of stability and flow.

phosphate mining, phosphate mining process, phosphate beneficiation- xinhai - xinhai

phosphate mining, phosphate mining process, phosphate beneficiation- xinhai - xinhai

[Introduction]: According to different ore properties of phosphate, Xinhai designs many processes for it such as flotation, gravity separation, chemical leaching, combined dressing, photoelectric sorting, etc. Flotation is widely used in phosphate including direct flotation, reverse flotation, reverse flotation and flotation, and double-reverse flotation process.

Direct flotation inhibits gangue minerals by effective inhibitors, and the phosphorus mineral is enriched in foam by collecting agent. This process is suitable for low grade phosphate ores including magmatite type apatite and sedimentary metamorphic type phosphorite ore.

Mainly used for the separation of phosphate and dolomite; dolomite is collected with fatty acid collector in weak alkaline medium, and the phosphorus mineral is enriched in the groove. The biggest advantage of reverse flotation process is the realization of the normal temperature flotation.

In alkaline conditions, double-reverse flotation makes the silicate surface positively charged, and the anionic collector separates minerals meaning floating dolomite firstly, and then reverse floating silicate; the product is heavy concentrate in groove; the production line can be carried out at normal temperature and coarse grain condition.

gold flotation | gold mining process | gold mining equipment for sale

gold flotation | gold mining process | gold mining equipment for sale

Mining Equipment Manufacturers, Our Main Products: Gold Trommel, Gold Wash Plant, Dense Media Separation System, CIP, CIL, Ball Mill, Trommel Scrubber, Shaker Table, Jig Concentrator, Spiral Separator, Slurry Pump, Trommel Screen.

flotation separation for mineral flotating - xinhai

flotation separation for mineral flotating - xinhai

Flotation Seperation is used for Mineral Flotation. Xinhai Flotation Cells are mainly applied in mineral ore dressing plants, selecting the valuable mine from gangue. This kind of flotation machine is applicable for the separation of numerous of mineral ores, such as fluorite and talc, gold ore, copper ore, iron ore and zinc ore and so on.

When the impeller of the flotation machine rotates, the centrifugal force with the action of upper and lower vanes is produced, and drives the slurry in upper and lower wheel chambers thrown around, by which the negative pressure area is formed in upper and lower wheel chamber. At the same time, the slurry on top of flotation equipment cover place is absorbed into upper wheel chamber to form upper circulation via the circular hole on the cover plate. When the slurry is thrown around by the lower vane, the lower slurry flows to the center to complement, by which the lower circulation is formed. And the air is sucked into the upper impeller chamber via suction pipe and center cylinder, mixing with absorbed slurry, and forming a large number of tinny air bubbles. After steady flow through the cover board, these bubbles are evenly dispersed in tank, forming mineral laden bubbles. Then mineral laden bubbles will rise to the foam layer, and become foam products by the scraper.

gold flotation,gold processing,gold ore processing

gold flotation,gold processing,gold ore processing

In addition, due to the friction between the solid particlesin the grinding process, especially between the steel balls and the strong grinding effect of gold particles, gold grain surface by iron and other metal contamination. All of these characteristics adversely affect the floatability of gold.

Natural gold is not a chemically pure mineral. It is a compoundor alloy with other mental. Common impurities in natural gold are silver and copper, followed by iron, secret, platinum , etc. Impurity adulteration on the floatability of natural gold is also a great influence. Because the impurities will reduce the relative density of gold particles, change the structure and reduce the floatability of gold. The more impurities, the more easily oxidized, the more obvious the reduction of gold floating ability. Such as gold in silver and copper, the natural gold surface becomes easy to oxidation, which can reduce the floatability. If the gold is in the form of gold sulfide, its floating behavior is equivalent to sulfide ore, and sulfide ore containing gold after the floatability generally have increased.To sum up, the ore in the gold has both easy to float side, but also has a difficult floating side. In order to fully recover in the actual production process,we should take appropriate measuresbased onabove characteristics. we should develop a reasonable flotation processand select the appropriate technical conditionsto eliminate all kinds of adverse effects of gold floating performance of the negative factorsand improve the floatability of gold in order to maximize the gold flotation index.

a introduction of flotating process about copper-lead-zinc - xinhai

a introduction of flotating process about copper-lead-zinc - xinhai

The geology of the region was formed before the time of Cretaceous and Jurassic in Earl Calloway and Cassian, two original forest area, Indonesia. Due to being rich in a variety of mining, granite diorite porphyry, Angle of rock, quartzite, coagulation earth rock, silicified wood, aplite and hydrothermal metallogenic essential substances, so the mineral resources are particularly abundant.

Longteng Co., LTD have a mine with copper, lead, Zinc and more in Indonesia. Here, because of the relatively backward technology of the mining process in the mineral industry, Longteng would like to cooperate with a mining machinery company proficient in advancing ore process technology and outsource the whole project. After communicating with several powerful mining machinery companyLongteng decided to choose Xinhai Mining Machinery company with over two decades of experience of mineral process EPC.

Upon signing the contract, Xinhai send some technicians on mission to take sample to do a study and analysis on the mineral composition, and they found that the main elements are pyrite, binding iron sphalerite, galena, pyrite, sphalerite, chalcopyrite and the nonmetal minerals are mainly quartz, feldspar, followed by calcite, dolomite, sericite, chlorite and carbon, etc.

The technicians did a further study and found that in this mine there are chalcopyrite,magnetite, sphalerite, galena, which existed in a situation of symbiotic relationship, and part of them existed in marmatite with a milky state. For that matter, crushing cannot finish the work to separate the mine directly. Part of chalcopyrite included in the gangue particles, so it might lose much along with the tailings discharging, which caused a big effect on the copper recovery rate. Iron sphalerite is the main zinc mineral including fine grain of Galena, pyrrhotite, carbon, etc. So it is difficult to achieve monomer dissociation. In addition to the iron content of marmatite is more than 10% on average, which much affects the zinc concentrate grade.

For this kind of complex mine, the target of achieving higher mineral processing index cannot be reached. Even for Xinhai company, it was also a big challenge. Ultimately technicians determined to adopt the solution of copper lead mix-mining flotation, mixed concentrate separation of copper and lead, and zinc tailings on the basis of low copper content according to many times of mining flotation test. A detailed introduction of mining flotation process designed by Xinhai company is as follows.

1. Copper lead mix-mining flotation With the condition of mixing slime slurry , the PH reaching around 7.5, having the Ty 1 and zinc sulfate as inhibitors of sphalerite, iron sphalerite, having ethyl xanthate (70 g/t), J 21 (35 g/t) as a collector, the zinc, lead and copper were separated efficiently and keeping the foam viscosity moderate to create conditions for the next step of separating copper and lead.

2.Separation of Copper and Lead With the method of CMC potassium dichromate to floating copper and having B butter and 2# as collector and frother, and keeping mining flotation foam stability, copper concentrate could be processed efficiently, but the lead concentrate grade was only about 4%, belonging to the course lead concentrate. In order to reach a higher index of lead concentrate, gravity separating, shaking table work was be adopted to achieve lead concentrate according to the mineral density differences in lead concentrate.

3. Zinc tailings With the condition of having lime (3500 g/t), copper sulfate (500 g/t), butyl xanthate (60 g/t),2# oil (60 g/t) as reagents and the floating PH between 12-13,zinc coating processing from the tailings was operated to get zinc concentrate. After the coating work, two times of concentrating and one time of scavenging was finished to get better lead concentrate.

With the mining flotation process designed by Xinhai, the index was beyond Longteng prediction. Finally, the result was great. the copper concentrate grade 24.06%, recovery rate 51.70%, and lead concentrate grade of 58.3%, the recovery rate of 89.24%, zinc concentrate grade was 47.08%, the recovery rate of 87.21%.

Besides higher process index, thisfloatingprocess also has many characteristics, such as simple process, short process, stable indicators and so on. It was easy to implement and meet environmental requirements. Xinhai company not only did an excellent service for Longteng company but also won a good reputation for his own in Indonesia through this EPC service project.

flotation reagent, flotation agent, flotation reagents

flotation reagent, flotation agent, flotation reagents

For the flotation process, whether a mineral processing obtains the satisfactory mineral processing indexes depends largely on the flotation reagent system, including the type of flotation reagent, the amount of flotation reagent, the method and location of flotation reagent added. In general, Xinhai helps customers to determine the scientific and reasonable flotation reagents system according to the results of mineral processing test, and continuously adjusts the flotation reagents system in the production, so as to obtain the ideal technical and economic indicators.

After grasping the process mineralogical properties of the ore, Xinhai mine research institute will determine its flotation principle. Different flotation principles mean different flotation reagent systems. Based on more than 20 years of mineral processing practice and experience, Xinhai mine research institute has summarized several experiences as follows:

Easiness to hardness, that is, float the easy-floating minerals first, then float the difficult-floating minerals. Inhibit the minerals with poor floatability, or inhibit those easy-inhibiting minerals. Do not inhibit those minerals with good floatability and difficult-inhibiting.

After selecting the floatation principle, Xinhai mine research institute will select the flotation reagent schemes for different floatation cycles one by one, which is required to refer to the practical experience of similar mineral processing plants, and analyze the ore properties, possible flotation schemes, then select the collectors, regulators and foaming agents in turn.

Sulfide ore: Lime inhibits used to inhibit pyrite; cyanide inhibits used to inhibit sphalerite, pyrite, chalcopyrite; sulfite used to inhibit sphalerite, pyrite; zinc sulfate used to inhibit sphalerite; dichromate used to inhibit galena;

In the flotation process, Xinhai mine research institute suggests that the appropriate dosage of flotation reagents should be selected according to the results of mineral processing tests. In the actual production, Xinhai mine research institute will adjust the dosage of flotation reagents according to the specific situation if the material composition changes, otherwise the dosage of flotation reagents cannot be changed arbitrarily.

Due to the different ore properties, the dosage range of flotation reagent is also different. Even for the same type of ore, there are also some differences in the formation of ore deposit, so the content of useful minerals and gangue vary, and the dosage of flotation reagent required in the flotation process are also different.

Each flotation reagents usually do not interact with minerals alone, so it cannot be viewed in isolation. For example, the collector and inhibitor often interact in the same system, the activator and inhibitor also interact in the same system.

Collector: Add it to the agitation tank or flotation cell with the foaming agent, while the insoluble collector (such as cresol aerofloat, white catching agent, kerosene) is often added to the grinding mill to promote its dispersion and increase the action time with minerals.

Regulator: Add regulator to the grinding mill firstly, which not only make the inhibitor and collector play the role in the appropriate pulp, but also eliminate some unavoidable ions that are harmful to the flotation effect.

Several-time dosing: Add the flotation reagents in several times along roughing, concentrating and scavenging. Generally, add 60%~70% of the total amount before the flotation stage, and the rest of reagents is added to the appropriate locations in batches.

Application: Oxidizing, labile and reactive reagents, such as xanthate, sulfur dioxide gas; Reagents that are insoluble in water and can be taken away by the froth, such as oleic acid, aliphatic amine; Reagents required a strict dosage, such as sodium sulfide.

Xinhai mine research institute and mine design institute have passed CNAS international certification, who have the technical ability of carrying out calibration and testing service according to the relevant international standards. And the feasibility study report issued by Xinhai is recognized by international financial institutions.

Xinhai laboratory has a complete set of modern and advanced equipment, including crushing equipment, fine grinding equipment, roasting equipment, drying equipment, spectrometer, atomic fluorescence spectrometer, atomic absorption spectrophotometer, infrared ore testing equipment, etc.

Xinhai laboratory can conduct tests on various mineral processing methods, such as gravity separation, magnetic separation, flotation, cyanide leaching and adsorption, bacterial oxidation, acid leaching, wet dressing, special dressing, heap leaching, tailings concentration and dry drainage, then determine the technical parameters of each method and provide the reasonable ore dressing process.

gold flotation gold ore recovery high frequency

gold flotation gold ore recovery high frequency

Cil Cip Gold Iron Magnetic Separation High Frequency. Gold CIL CIP Gold Leaching Process Explained CCD2020-04-20 At many operating Ltd. Alluvial Gold Ore Wash Plant images rg gold washing plant grinding mill equipment. methods of mining alluvial gold

Gold ore whose types of deposits are diverse and complex is the mineral assemblage of gold. With features of chalcophile affinity and high melting point, the gold ore includes conglomerate type, porphyry type, quartz vein type and volcanic rock type, etc.

Home / Crusher / Equipment / gold leaching ore flotation separation high frequency gold leaching ore flotation separation high frequency Gold extraction - Wikipedia Gold extraction refers to the processes required to extract gold from its ores. This may require a ...

In order to extract gold, it is necessary to crush and grind the ore to suitable size and then separate the gold from the ore using specific mineral processing method and gold recovery chemicals. At present, gravity separation, flotation separation, heap leaching and cyanidation (CIL,CIP) are four commonly used gold recovery methods.

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This complete process plant is for recovering gold by gravity concentration and froth flotation. This commonly applies, but is not limited to, ore deposits containing GRG gold and sulphide minerals rich in gold (such as: Pyrite, Copper). This process will also recover silver associated with sulphide minerals. This simple metallurgical concentrator includes single stage crushing, conveying ...

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1/1/2016 Most problems in gold ore flotation are not connected with floating metallic gold. The flotation recovery of free gold (throughout the text free gold is synonymous with liberated gold) is largely affected by physical constraints such as the shape and size of the gold

Gold Flotation Process is use to process fine gold, high floatability of sulfide gold-bearing quartz veins ore, multi metal gold-containing sulfide ore and carbon-containing ore. Process description In the flotation process of the major steps that must be done include:the process destruction of rock minerals, milling, flotation, drying and smelting.

Gold ore whose types of deposits are diverse and complex is the mineral assemblage of gold. With features of chalcophile affinity and high melting point, the gold ore includes conglomerate type, porphyry type, quartz vein type and volcanic rock type, etc.

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1/1/2016 Most problems in gold ore flotation are not connected with floating metallic gold. The flotation recovery of free gold (throughout the text free gold is synonymous with liberated gold) is largely affected by physical constraints such as the shape and size of the gold

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Home / Crusher / Equipment / gold leaching ore flotation separation high frequency gold leaching ore flotation separation high frequency Gold extraction - Wikipedia Gold extraction refers to the processes required to extract gold from its ores. This may require a ...

Gold is often dense associated with sulfide minerals, especially with pyrite,therefore, the sulfide minerals must be selected at the same time in the recovery of gold. The relative density of gold is very large. In the process of flotation, the gold particles are

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high recovery ratio gold mining machine manganese flotation cell in bangladesh The application has shown that the recovery of gold can be very high as much as 99 and the concentration ratio is up to 1000 times In the recovery of natural gold in lode ore that has a ...

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