About Us

Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

120

million

cubic meters

Industrial chain production base

70

national patents

689sets

national patents

170

Equipment service country

Company Culture

core values of the company

Create Value

Share Value

Observe Order

Respect Value

Service philosophy

Religious, fine, tight, and harmonious

LIMING spirit

Standardization, value, serialization, and differentiation will always exceed our contract

Brand Concept

Create and promote civilization, refine and interpret brilliantly

Business philosophy

Religious, meticulous, rigorous, and harmonious work

Our Global Footprint

Case Scene

Gold-Copper Ores - ScienceDirect

01/01/2016  Shortly after the copper recovery plant was commissioned, the primary crusher failed and the plant was fed from a large stockpile of crushed laterite ore, which contained negligible copper. As expected, the copper in the circuit reduced to a low level, but when sulfide copper–gold ore processing resumed, the copper concentration in the leach circuit did not attain previous levels even though a higher copper orebody was being mined. The copper recovery plant

Gold-copper ores - ScienceDirect

01/01/2005  Shortly after the copper recovery plant was commissioned, the primary crusher failed and the plant was fed from a large stockpile of crushed laterite ore, which contained negligible copper. As expected, the copper in the circuit reduced to a low level, but when sulfide copper–gold ore processing resumed, the copper concentration in the leach circuit did not attain previous levels even though a higher copper orebody was being mined. The copper recovery plant

Eliminating Copper from Gold Ore - 911 Metallurgist

11/10/2015  This cuprocyanide is obtained by heating the cupriferous ore with cyanide solution. When the cuprocyanide has dissolved its maximum of copper, part of the copper in the solution is precipitated electrolytically during which a partial regeneration of the cyanide is said to take place. The treated ore is then cyanided in the usual way and the gold recovered by electrolytic precipitation. Whether or not any precious metal was dissolved in the preliminary cyanide

Recovery of Gold and Silver and Removal of Copper, Zinc ...

In the metallurgical operation plants, the concentration of cyanide used to dissolve gold in ores is typically higher than the stoichiometric ratio, since other minerals get dissolved by cyanide. Free cyanide produces com-plexes with several metallic species, especially transition metals of copper, zinc and iron, which show a broad variation in both stability and solubility, as discussed by ...

Biogenic sulphide for cyanide recycle and copper recovery ...

01/05/2008  Copper–gold ore processing (higher copper values than gold values) generally involves flotation and smelting. In the latter case, gold credits are obtained from the smelting of the copper concentrate, and if gold reports to the flotation tailings, they may also require cyanidation. A notable and relevant exception to this generalization is that of Newcrest Mining’s Telfer plant, where pyrite-associated gold is recovered

How to improve copper gold recovery to copper ...

I have been given a project on optimization of copper concentrate grade so as to improve copper and gold recovery. I need help on the main factors which I have to consider in my project. The targeted copper concentrate grade at the plant is 18- 20%Cu, but currently the target is not achieved. The plant ore is chalcopyrite.

Gold Extraction Recovery Processes - 911 Metallurgist

In general, the presence of sulphides does not affect the gold recovery due to the fact that gold is more hydrophobic than sulphides. However, there is point that affects slightly the gold recovery. The auriferous ore is ground and later mixed with coal-oil agglomerates in mechanical tanks. The process can work in counter current, like a CIP plant, using screens for retaining the agglomerates and the slurry goes to the next tank. Alternatively, the ore

Recovery of Silver, Gold, and Lead From a Complex Sulfide ...

RECOVERY OF SILVER, GOLD, AND LEAD FROM A COMPLEX SULFIDE ORE USING FERRIC CHLORIDE, THIOUREA, AND BRINE LEACH SOLUTIONS By R. G. Sandberg 1 and J. L. Huiatt 2 ABSTRACT The Bureau of Mines investigated a hydrometallurgical procedure to re­ cover gold, silver, and byproduct lead from a complex lead-zinc sulfide ore. A ferric chloride (FeCI3 ) preleach, at 40° C

Copper recovery using leach/solvent extraction ...

extraction/electrowinning plant Ranchers leached run of mine copper oxide ore (> 0.5% Cu) placed in a sealed canyon in 20-foot layers (heaps) by distributing dilute sulphuric acid over the fresh ore via spray emitted from needle valves with pipes and needle valves placed to ensure complete coverage of the ore. New heaps were built over old heaps. Pregnant leach solution flowing

Estimates of Electricity Requirements for the Recovery of ...

Ground ore is directed to a series of froth flotation cells in which hydrophobic copper sulfides and other minerals attach to bubbles where they form a froth that is skimmed off.....28 Figure 5.

Recovery of Gold and Silver and Removal of Copper, Zinc ...

In the metallurgical operation plants, the concentration of cyanide used to dissolve gold in ores is typically higher than the stoichiometric ratio, since other minerals get dissolved by cyanide. Free cyanide produces com-plexes with several metallic species, especially transition metals of copper, zinc and iron, which show a broad variation in both stability and solubility, as discussed by ...

Improving the recovery of gold and copper in a CIP ...

In the early stages of the operation the overall gold recovery achieved averaged 61% and copper recovery was 74%. The plant was experiencing problems in the leach, adsorption, elution and electrowinning sections mainly as a result of the presence of copper in the ore. The changes made to the operating standards, the response of the circuit to these changes and the final Circuit layout and ...

How to improve copper gold recovery to copper ...

I have been given a project on optimization of copper concentrate grade so as to improve copper and gold recovery. I need help on the main factors which I have to consider in my project. The targeted copper concentrate grade at the plant is 18- 20%Cu, but currently the target is not achieved. The plant ore is chalcopyrite.

Application of SART to Heap Leaching of Gold-Copper

Overall gold recovery from ore to gold dore at Maricunga is 65 - 70 %. CYANIDE SOLUBLE COPPER. In the Maricunga region, gold mineralization occurs with copper . minerals, some of which leach readily in the cyanide solution that is applied to extract the gold. Table 1 indicates typical cyanide solubility of copper minerals in 0.1% NaCN solutions (Hedley and Tabachnick, 1958). The percent ...

Mineral Ore, Copper Ore and Gold Ore Beneficiation Plant

Gold/Copper Ore Processing Solutions. India's leading contractors in BOT/ EPC/ LSTK. Unbeatable recovery rate. Proprietary Technology. No chemicals or mercury required. Simple structure, High processing capacity, Easy-to-Operate Maintain, Lower operation cost and High separation density. Precious Metal Extraction From Tailings.

Copper recovery using leach/solvent extraction ...

Copper recovery by L/SX/EX in 1968 In 1968 there were only two widely practiced copper leaching processes using dilute sulphuric acid. The first process, vat leaching of high-grade copper oxide ore followed by EW of copper from the leach solution, produced low quality copper cathode at relatively high cost. In 1968 the tonnage of high-

Gold Mining Plants For Alluvial And Hard Rock Mining

Gold mining plants are supplied for both alluvial gold mining, and the hard rock gold mining operations. DOVE gold mining plants are designed according to your ore’s characteristics, and minerals composition with the aim of highest recovery to micron size particles, with no loss. EXPLORER® Portable plants are produced in 18 models, capacity ...

The leaching and adsorption behaviour of gold ores

1.2 THE RECOVERY OF GOLD BY CY ANIDATION AND CIP/CIL PROCESSING 2 1 ... 3.6.2.4 Analysis of plant activated carbons 3.6.3 Ore analysis 3.6.3.1 Ore characterisation 3.6.3.2 Analysis of gold in ore solids 3.6.4 X-ray diffraction 3.6.5 BET surface area analysis 3.6.5.1 Method of BET analysis 3 .6.6 SEM analysis 3.7 MEASUREMENT OF MINERAL REST POTENTIAL 3. 7.1 Construction of mineral

PLASMA SMELTING OF UNCONVENTIONAL ORES AND MINE RESIDUES ...

Conventional mining operations can produce a wide range of wastes containing gold and other precious metals but which are less suitable for processing by traditional methods. There are also types of ore that do not fit easily into a traditional processing flowsheet, e.g. because the refractory nature of their minerology or the combination of valuable metals is less suitable for traditional ...

Estimates of Electricity Requirements for the Recovery of ...

A photograph of the Cripple Creek Victor Mining Company’s open-pit gold operation in Cripple Creek, Colorado, showing a fairly typical heap leach gold operation .....55 Figure 8. A photograph of an electric rope shovel of the type used in large open pit mines.....81 Figure 9. A segment of an 8 kilometer-long electrically-driven conveyor belt used to transport ore from the in-pit crusher at ...

Recovery of Gold and Silver and Removal of Copper, Zinc ...

In the metallurgical operation plants, the concentration of cyanide used to dissolve gold in ores is typically higher than the stoichiometric ratio, since other minerals get dissolved by cyanide. Free cyanide produces com-plexes with several metallic species, especially transition metals of copper, zinc and iron, which show a broad variation in both stability and solubility, as discussed by ...

Improving the recovery of gold and copper in a CIP ...

In the early stages of the operation the overall gold recovery achieved averaged 61% and copper recovery was 74%. The plant was experiencing problems in the leach, adsorption, elution and electrowinning sections mainly as a result of the presence of copper in the ore. The changes made to the operating standards, the response of the circuit to these changes and the final Circuit layout and ...

Microbes and mineral recovery: Bioleaching of copper, gold ...

Microbes and mineral recovery: Bioleaching of copper, gold and uranium. Dr. Yogender Pal Khasa The elements or compounds, which occurs naturally in earth's crust are known as MINERALS. At some places, minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. These are called ORES. Smelting : it is a form of extractive metallurgy ; to ...

copper plant in ore dressing ore and gold processing

Jan 01, 2016 As expected, the copper in the circuit reduced to a low level, but when sulfide copper–gold ore processing resumed, the copper concentration in the leach circuit did not attain previous levels even though a higher copper orebody was being mined. The copper recovery plant was operated intermittently for a few months and was eventually shut down. Ask For Price. Mineral ...

Cyanidation of a copper-gold ore - ScienceDirect

01/08/1997  Discussion The high copper content of this ore (0.4%) creates a kinetic problem for gold extraction, This explains, partly, why the addition of lead nitrate and oxygen enhances gold dissolution and significantly improves gold recovery. Lead nitrate has no effect on the overall gold extraction when added in amounts higher than 300 g/t. However, lead nitrate is not found to be efficient for ...

Gold recovery plant, Kokpatas, Uzbekistan: Dobersek

Copper. Gold recovery plant, Kokpatas, Uzbekistan. Gold Beneficiation Sorting Hydrometallurgy. Reconstruction of a gold recovery plant based on the bio-oxidation process . Customer Navoi Mining and Metallurgical Combine (NGMK), Uzbekistan. Commissioning. 1st stage 2009; 2nd stage 2011; Services. Full project planning and coordination of the reconstruction and expansion of a gold recovery ...

Hard Rock Processing Plants For Gold, Kimberlite, Tin DOVE

Hard rock mining is the process of extracting metals and minerals encased in rocks (primary deposit). Hard rock ore can contain metals, minerals such as gold, platinum, silver, iron, copper, manganese, zinc, nickel, tin and lead, zircon, etc. DOVE offers the most extensive and complete line of Hard Rock Processing Plants, configured with ...

17 - Flotation of Gold Ores - Aalto

copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different. 17.2 GEOLOGY AND GENERAL MINERALOGY OF GOLD-BEARING ORES The geology of the deposit and the mineralogy of the ore play a decisive role in the selection of the best treatment method for a particular gold ore. Geology of the gold deposits [3] varies ...

Gold Mining Plants For Alluvial And Hard Rock Mining

Gold mining plants are supplied for both alluvial gold mining, and the hard rock gold mining operations. DOVE gold mining plants are designed according to your ore’s characteristics, and minerals composition with the aim of highest recovery to micron size particles, with no loss. EXPLORER® Portable plants are produced in 18 models, capacity ...

PLASMA SMELTING OF UNCONVENTIONAL ORES AND MINE RESIDUES ...

Conventional mining operations can produce a wide range of wastes containing gold and other precious metals but which are less suitable for processing by traditional methods. There are also types of ore that do not fit easily into a traditional processing flowsheet, e.g. because the refractory nature of their minerology or the combination of valuable metals is less suitable for traditional ...

Recovering Gold from Copper Concentrate via the ...

ore grinding and flotation. Limited resources of oxidized copper ores, the long leaching time of chalcopyrite, ... recovery of 87% gold and 98% copper, respectively. The gold-containing solu-tion was pumped through small carbon columns that removed gold down to a level less than 0.02 mg/L. Another commercial chalcopyritic copper concentrate containing 23.5% copper and 4.3 ppm gold was studied ...

Improving the recovery of gold and copper in a CIP ...

In the early stages of the operation the overall gold recovery achieved averaged 61% and copper recovery was 74%. The plant was experiencing problems in the leach, adsorption, elution and electrowinning sections mainly as a result of the presence of copper in the ore. The changes made to the operating standards, the response of the circuit to these changes and the final Circuit layout and ...

Microbes and mineral recovery: Bioleaching of copper, gold ...

Microbes and mineral recovery: Bioleaching of copper, gold and uranium. Dr. Yogender Pal Khasa The elements or compounds, which occurs naturally in earth's crust are known as MINERALS. At some places, minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. These are called ORES. Smelting : it is a form of extractive metallurgy ; to ...

Cyanidation of a copper-gold ore - ScienceDirect

01/08/1997  Discussion The high copper content of this ore (0.4%) creates a kinetic problem for gold extraction, This explains, partly, why the addition of lead nitrate and oxygen enhances gold dissolution and significantly improves gold recovery. Lead nitrate has no effect on the overall gold extraction when added in amounts higher than 300 g/t. However, lead nitrate is not found to be efficient for ...

Hard Rock Processing Plants For Gold, Kimberlite, Tin DOVE

Hard rock mining is the process of extracting metals and minerals encased in rocks (primary deposit). Hard rock ore can contain metals, minerals such as gold, platinum, silver, iron, copper, manganese, zinc, nickel, tin and lead, zircon, etc. DOVE offers the most extensive and complete line of Hard Rock Processing Plants, configured with ...

Gold recovery plant, Kokpatas, Uzbekistan: Dobersek

Copper. Gold recovery plant, Kokpatas, Uzbekistan. Gold Beneficiation Sorting Hydrometallurgy. Reconstruction of a gold recovery plant based on the bio-oxidation process . Customer Navoi Mining and Metallurgical Combine (NGMK), Uzbekistan. Commissioning. 1st stage 2009; 2nd stage 2011; Services. Full project planning and coordination of the reconstruction and expansion of a gold recovery ...

SART Process for Gold Recovery and Cyanide

Gold recovery can become uneconomical when cyanide-soluble base metals such as copper and zinc are present in gold ore deposits. These metals form weak acid dissociable (WAD) complexes with the cyanide and preferentially competes for cyanide. The result is high cyanide consumption, poor gold doré purity and high concentrations of copper-cyanide complexes in tailings that require costly ...

17 - Flotation of Gold Ores - Aalto

copper ore, gold antimony ores, etc.), because the flotation methods used for the recovery of gold from different ores is vastly different. 17.2 GEOLOGY AND GENERAL MINERALOGY OF GOLD-BEARING ORES The geology of the deposit and the mineralogy of the ore play a decisive role in the selection of the best treatment method for a particular gold ore. Geology of the gold deposits [3] varies ...

The process design of gold leaching and carbon-in-pulp ...

Assuming that a gold ore has been effectively ground to ensure maximum economic liberation of gold, the circuits that will have the most effect on the successful operation of a gold plant will be that of the leaching and carbon-in-pulp circuit (CIP). The reagent and utilities operating costs associated with leaching, adsorption, elution and regeneration would typically make up some 15% of ...

Processing of Konkola copper concen- trates and Chingola ...

electrowinning (RLE) plants, and to the copper smelters to make up for a sulphur deficit in the smelter feed. The Konkola mine commenced production in 1957. The mine is one of the wettest in the world, with a total of 300 000 cubic metres of water being pumped daily from the underground mine. Current mine production from Konkola’s Kililabombwe orebody amounts to approximately 2 million ton ...