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 Chlorination Processes Methods - 911

2016-8-31  Chlorination Process for Gold This process was based on the fact that chlorine, in the presence of moisture, converts gold into the trichloride AuCl3 , which is soluble in water and removed by washing, the gold being then precipitated by ferrous sulphate, sulphur dioxide, hydrogen sulphide, or

extraction of gold by chlorination

The Newbery–Vautin chlorination process is a process to extract gold from its ore using chlorination developed by James Cosmo Newbery and Claude Vautin.. Background. The process of extracting gold from ores by absorption of the precious metal in chlorine gas, from which it is reduced to a metallic state, is not a very new discovery.

Gold Chlorination Archives Mineral Processing

2021-6-2  Gold Bromination Gold Chlorination= F(Silver) When dry chlorine gas is made to act in the cold upon finely-divided gold, it converts the latter with evolution of heat into auro-auric chloride, Au2Cl4, a hard, dark-red, hygroscopic salt.

Gold extraction by chlorination using a

2009-3-1  The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied through changes in the reactant solid.

Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3  The chlorination equipment used in the laboratory has a simple design and permits a safer use of chlorine gas. References Deng, H., Li, X., 1987. Chloride roasting of a complex gold ore and treatment of chlorine fume for precious-metal recovery-experimental results. Transactions Institution of Mining and Metallurgy (C: Mineral Processing Extractive

Gold Chlorination Process in VAT - 911 Metallurgist

2016-10-31  The collection of the gold is expedited and ensured by adding acetate of lead to the solution; by this device lead sulphate is precipitated with the gold, and, in settling to the bottom, carries the particles of precious metal with it. This process was

Chlorination Archives Mineral Processing Metallurgy

2021-6-18  The Barrel Gold Chlorination Process The use of revolving barrels for chlorinating ores was perhaps suggested by the old Freiberg method of barrel amalgamation. It has already been mentioned, p. 239, that Dr. Duflos used a revolving barrel in some of his experiments at Breslau, in 1848, and obtained results almost identical with those given by the vat percolation method.

Establishing thE ProcEss MinEralogy of gold orEs

of refractory gold minerals and locking of submicroscopic gold in sulfide mineral structure etc. Gold process mineralogy helps address issues and problems related to gold ore processing. It provides useful information on process selection, flowsheet development, recovery improvement and reagent consumption optimization.

Gold processing 101 - Mining Magazine

2017-9-7  At current gold prices this is worth about US$600. Both smelter treatment charges and oxidation or bio-leach costs are at least $200/t of concentrate and payables/recovery in the 90% range, so a minimum GSR for effective downstream processing is around 0.5. Clearly this is a function of gold price, but in the current gold price and cost ...

Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3  The chlorination equipment used in the laboratory has a simple design and permits a safer use of chlorine gas. References Deng, H., Li, X., 1987. Chloride roasting of a complex gold ore and treatment of chlorine fume for precious-metal recovery-experimental results. Transactions Institution of Mining and Metallurgy (C: Mineral Processing Extractive

Experiment of Gold and Silver Extraction from Cyanide ...

process for gold extraction based on the existing chlorination roasting process. It is a process for integrated recycling of gold, silver and other valuable metals from cyanide tailings by short process molten salt chlorination under high temperature. The process

Simultaneous extraction of gold and zinc from

2020-4-1  A novel process based on chlorination roasting was proposed to simultaneously recover gold and zinc from refractory carbonaceous gold ore by using NaCl as chlorination agent. The effects of roasting temperature, roasting time and NaCl content on the volatilization rates of gold

Hydrometallurgy - Mining Mineral Processing -

2021-6-9  Leaching (Lixiviate, Heap Leaching, Dump Leaching, Tank Leaching, In situ Leaching, Gold Chlorination, Gold Cyanidation and Bayer Process). Solutions concentration purification. Metal recovery. Pexgol lower both operational and capital

Gold Process Mineralogy - SGS

process mineralogy address all issues related to gold ore processing by the detailed study of an ore or a mill product. The methodology is widely used as a predictive tool in feasibility studies and during the process development stage, and as a troubleshooting tool for mineral processing and hydrometallurgical operations. INTRODUCTION

Metal Extraction Through Chlorine Metallurgy: Mineral ...

2018-6-16  Abstract. Chlorination has been an important process step in the extraction of many nonferrous metals from their ores and concentrates. Some of the important chlorinating agents are gaseous chlorine, hydrochloric acid, ferric chloride, carbon

Establishing thE ProcEss MinEralogy of gold orEs

of refractory gold minerals and locking of submicroscopic gold in sulfide mineral structure etc. Gold process mineralogy helps address issues and problems related to gold ore processing. It provides useful information on process selection, flowsheet development, recovery improvement and reagent consumption optimization.

Gold processing 101 - Mining Magazine

2017-9-7  At current gold prices this is worth about US$600. Both smelter treatment charges and oxidation or bio-leach costs are at least $200/t of concentrate and payables/recovery in the 90% range, so a minimum GSR for effective downstream processing is around 0.5. Clearly this is a function of gold price, but in the current gold price and cost ...

Introduction to Mineral Processing or Beneficiation

2018-1-12  The most common and notable example of this are precious metal values (gold, silver etc.) where the beneficiation process is applied directly on run-of-mine ores followed by the extraction of gold and in some cases silver as a relatively pure metal within the mineral processing circuit. 2.0 Processing

Chlorination roasting-coupled water leaching process

2020-9-5  The present paper reports the effective utilization of marble sludge powder (MSP) for the recovery of potash values from waste mica scrap using chlorination roasting-water leaching method. Characterization studies indicated the presence of dolomite as the major mineral phase in MSP, whereas muscovite and quartz were observed in the mica sample. The acid leaching studies suggest a

The Chlorination of Gold Ores. - Digitised Collections

2020-2-20  The history of the chlorination process is interesting, and not commonly known, so that a brief account of it will not be out of place. Dr. Percy—rightly called the father of English Metallurgy —in 1848 read a paper on the value of chlorine as a means of extracting gold from ores ; in the same paper he suggested the

Processing, smelting and refining gold World Gold

2021-6-21  The two gold refining methods most commonly employed to derive pure gold are: the Miller process and the Wohlwill process. The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold. The Miller process is rapid and simple, but it ...

CIL Gold Mining Solution - Mineral Processing

Gold CIL processing plant Carbon in Leach (CIL) process is widely used in the mining industry and in particular, it is an integral step of gold processing in gold extraction. Normally the CIL process can concentrate gold from 2.5–3.5 g/t in ore to 2000 to 6000 g/t on carbon.

Hydrometallurgy - Mining Mineral Processing -

2021-6-9  Leaching (Lixiviate, Heap Leaching, Dump Leaching, Tank Leaching, In situ Leaching, Gold Chlorination, Gold Cyanidation and Bayer Process). Solutions concentration purification. Metal recovery. Pexgol lower both operational and capital

Gold Process Mineralogy - SGS

process mineralogy address all issues related to gold ore processing by the detailed study of an ore or a mill product. The methodology is widely used as a predictive tool in feasibility studies and during the process development stage, and as a troubleshooting tool for mineral processing and hydrometallurgical operations. INTRODUCTION

Metal Extraction Through Chlorine Metallurgy: Mineral ...

2018-6-16  Abstract. Chlorination has been an important process step in the extraction of many nonferrous metals from their ores and concentrates. Some of the important chlorinating agents are gaseous chlorine, hydrochloric acid, ferric chloride, carbon

Establishing thE ProcEss MinEralogy of gold orEs

of refractory gold minerals and locking of submicroscopic gold in sulfide mineral structure etc. Gold process mineralogy helps address issues and problems related to gold ore processing. It provides useful information on process selection, flowsheet development, recovery improvement and reagent consumption optimization.

General Mineral Processing Mining - Gold

2021-6-23  Batch Process / Cycle Time. The "i" series of concentrators use a batch process. Your cycle time will depend on the grade and weight of your feed. A heavy or rich feed will need a shorter cycle time. The iCON "i" concentrators can be cleaned out in around 3 minutes. Hard Rock mining operations may have 100 grams of gold per ton of feed. This is ...

Introduction to Mineral Processing or Beneficiation

2018-1-12  The most common and notable example of this are precious metal values (gold, silver etc.) where the beneficiation process is applied directly on run-of-mine ores followed by the extraction of gold and in some cases silver as a relatively pure metal within the mineral processing circuit. 2.0 Processing

Chlorination roasting-coupled water leaching process

2020-9-5  The present paper reports the effective utilization of marble sludge powder (MSP) for the recovery of potash values from waste mica scrap using chlorination roasting-water leaching method. Characterization studies indicated the presence of dolomite as the major mineral phase in MSP, whereas muscovite and quartz were observed in the mica sample. The acid leaching studies suggest a