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 Flotation - 911 Metallurgist

2016-7-13  Finely divided metallic gold in milling ores floats readily, and a high-grade concentrate can be made by flotation if no interfering slime or gangue is present. Any good collector may be used for the flotation of gold, but organic collectors of the xanthate type produce a cleaner, higher grade concentrate

Sulphide Gold Flotation Concentrate CIL Leaching

2021-6-14  Gravity Gold – Rougher Concentrate Flotation CIL Leaching Refining: This mineral processing plant is to recover gold from sulphide ore deposits. Provided here

Gold Recovery from its Flotation Concentrate using

The method for the recovery of gold from its flotation concentrate using acidic thiourea leaching followed by adsorption on an organosilicon polymer (PSTM-3C) was discussed in the present study. The study had allowed identification of the effect of thiourea, oxidizer and acid concentration, leaching time, temperature and pulp density on gold ...

Flotation of Gold and Gold-Bearing Ores - ScienceDirect

2016-1-1  A recent study of a number of flotation plants found that floated gold grains in the concentrate had a greater concentration of silver and sulfur than the gold remaining in the tailings, implying that they assisted gold flotation (Chryssoulis, 2001). Laboratory flotation tests on a flotation-plant tailing sample using NaHS and silver ions recovered 30–45% of the unfloated gold and NaHS provided the best results.

Gold Flotation Gold Mining Process Gold Mining ...

2021-6-21  Flotation is also used for the removal of interfering impurities before hydrometallurgical treatment, for the upgrading of low sulfide and refractory ores for further treatment. Flotation is considered to be the most cost-effective method for concentrating gold. Flotation process maximizes the enrichment of gold into sulfide minerals.

EDTA-enhanced cyanidation of refractory bio-oxidised ...

2020-5-1  EDTA activation of the bio-oxidised flotation concentrate enhanced the rate and yield of gold, consistent with the above physico-chemical results. Observations from the normalised leaching curves confirm the role of surface area in increasing gold.

Recovery of Platinum, Palladium, and Gold From Stillwater ...

The Bureau of Mines devised a procedure for selectively extracting platinum-group metals (PGM) and gold from Stillwater Complex flotation concentrate. The Stillwater Complex is the only major U.S. PGM resource. Development of a suitable extraction technique will contribute to its exploitation. The concentrate was roasted at 1,050° C to convert host base-metal sulfides to oxides and the PGM from sulfide minerals to their elemental states. The roasted concentrate was preleached with dilute sulfuric acid to remove easily soluble gangue minerals. After preleaching, the concentrate was slurried with 6M HCI and leached at ambient temperature and pressure with a strong -oxidizing agent. Hydrogen peroxide, chlorine, sodium hypochlorite, nitric acid, and a persulfate salt were the oxidants investigated. The two-stage leaching scheme extracted up to 97 pct of the platinum, 92 pct of the palladium, and 99 pct of the gold

Gold processing - Mining and concentrating Britannica

2 天前  Many gold-bearing ores and concentrates are not readily amenable to cyanidation, owing to the presence of substances that consume the cyanide reagent before it can dissolve the gold, preferentially adsorb the gold as it dissolves (a phenomenon called preg-robbing), or completely surround the gold

Separation efficiency improvement of a low grade copper ...

2017-12-21  The copper flotation circuits upgrade copper content by a factor of 80-160 times from feed to a saleable copper concentrate containing approximately 50% of the contained gold in feed (remaining gold is recovered both as a gravity product within the primary grinding circuit and also via leaching of a gold-containing pyrite concentrate).

High Precision, Advanced flotation gold concentrator ...

Alibaba features a broad selection of optimal quality flotation gold concentrator that work with high precision and make your work easier. Grab these flotation gold concentrator at low prices.

Study on Treatment of Gold Flotation Concentrate

The thiourea/CIP process for gold extraction of a certain kind of gold flotation concentrate was investigated.The factors affected the process were studied.The leaching rate and adsorption rate of gold reach 87.31% and 98.78%,respectively.The technology has many advantages,such as high leaching rate and adsorption rate,short leaching time and contacting time,and without environment pollution.

Gold Recovery from its Flotation Concentrate using

The method for the recovery of gold from its flotation concentrate using acidic thiourea leaching followed by adsorption on an organosilicon polymer (PSTM-3C) was discussed in the present study. The study had allowed identification of the effect of thiourea, oxidizer and acid concentration, leaching time, temperature and pulp density on gold ...

Gold Flotation Gold Mining Process Gold Mining ...

2021-6-21  Flotation is also used for the removal of interfering impurities before hydrometallurgical treatment, for the upgrading of low sulfide and refractory ores for further treatment. Flotation is considered to be the most cost-effective method for concentrating gold. Flotation process maximizes the enrichment of gold into sulfide minerals.

Development of a Production Scheme for Processing ...

2018-1-25  Flotation concentrate is sulfide gold-copper-arsenic product, and the valuable components are copper and gold (see Table 1). Results of fraction analysis and metal distribution with respect to size class are given in Table 2. Table 1. Flotation Concentrate Chemical Composition.

Recovery of Platinum, Palladium, and Gold From Stillwater ...

platinum-group metals (PGM) and gold from Stillwater Complex flotation concentrate. The Stillwater Complex is the only major U.S. PGM re­ source. Development of a suitable extraction technique will contribute to its exploitation. The concentrate was roasted at 1,050° C to convert

Investigation of Complex Treatment of the Gold

This paper details the hydrometallurgical method of processing of refractory gold antimony flotation concentrate. Investigation of feed material has been occurred. Mineralogical analyses (XRD, SEM-EDS) and chemical analyses of the concentrate have been studied. Mainly, the material consists of compounds of antimony, silicon, calcium, sulfur and iron.

5 Types Of Gold Flotation Reagent - Mining-pedia

2021-3-5  Gold flotation reagents can be divided into 5 types: collectors, foaming agents, inhibitors, activators, and pH regulators. Flotation reagent is one of the key factors affecting the flotation of gold ore. It can adjust the surface properties of gold ore during the flotation process, and improve the flotation speed and selectivity. This article will briefly introduce the working principles ...

Separation efficiency improvement of a low grade copper ...

2017-12-21  The copper flotation circuits upgrade copper content by a factor of 80-160 times from feed to a saleable copper concentrate containing approximately 50% of the contained gold in feed (remaining gold is recovered both as a gravity product within the primary grinding circuit and also via leaching of a gold-containing pyrite concentrate).

Gold processing - Mining and concentrating Britannica

2 天前  Gold processing - Gold processing - Mining and concentrating: The nature of the ore deposit determines the mining and mineral processing techniques applied. Oxide ore deposits are frequently of such low grade (e.g., 3 to 10 parts per million) that extensive

Study on Treatment of Gold Flotation Concentrate

The thiourea/CIP process for gold extraction of a certain kind of gold flotation concentrate was investigated.The factors affected the process were studied.The leaching rate and adsorption rate of gold reach 87.31% and 98.78%,respectively.The technology has many advantages,such as high leaching rate and adsorption rate,short leaching time and contacting time,and without environment pollution.

Gold Recovery from its Flotation Concentrate using

The method for the recovery of gold from its flotation concentrate using acidic thiourea leaching followed by adsorption on an organosilicon polymer (PSTM-3C) was discussed in the present study. The study had allowed identification of the effect of thiourea, oxidizer and acid concentration, leaching time, temperature and pulp density on gold ...

Gold Flotation Gold Mining Process Gold Mining ...

2021-6-21  Flotation is also used for the removal of interfering impurities before hydrometallurgical treatment, for the upgrading of low sulfide and refractory ores for further treatment. Flotation is considered to be the most cost-effective method for concentrating gold. Flotation process maximizes the enrichment of gold into sulfide minerals.

Gold Flotation - JXSC Machine

2021-6-2  Gold is usually concentrated in mineral concentrate by flotation if the gold is contained in polymetallic ore. Product Structure. In the flotation process, the following steps are included: crushing and screening, grinding and classification, flotation,

La Ronge Gold Captures Up to 93% Gold Recovery in

2013-6-3  Detailed gold recovery test work culminated in the completion of locked cycle testing of a proposed gravity and flotation process for the recovery of gold into a gravity concentrate and a flotation concentrate. Gold recovery results are summarized in the following table.

5 Types Of Gold Flotation Reagent - Mining-pedia

2021-3-5  Gold flotation reagents can be divided into 5 types: collectors, foaming agents, inhibitors, activators, and pH regulators. Flotation reagent is one of the key factors affecting the flotation of gold ore. It can adjust the surface properties of gold ore during the flotation process, and improve the flotation speed and selectivity. This article will briefly introduce the working principles ...

Investigation of Complex Treatment of the Gold

This paper details the hydrometallurgical method of processing of refractory gold antimony flotation concentrate. Investigation of feed material has been occurred. Mineralogical analyses (XRD, SEM-EDS) and chemical analyses of the concentrate have been studied. Mainly, the material consists of compounds of antimony, silicon, calcium, sulfur and iron.

Questions About Gold Flotation Processing

2019-10-30  When using gold flotation method to separate gold ores, the range of parameters determined by the beneficiation test and the production needs of the beneficiation plant is adjusted to determine specific mineral processing schemes for different gold ores to achieve ideal recovery and gold concentrate grade.

Separation efficiency improvement of a low grade copper ...

2017-12-21  The copper flotation circuits upgrade copper content by a factor of 80-160 times from feed to a saleable copper concentrate containing approximately 50% of the contained gold in feed (remaining gold is recovered both as a gravity product within the primary grinding circuit and also via leaching of a gold-containing pyrite concentrate).

Leaching of the arsenopyrite/pyrite flotation concentrates ...

2009-10-15  The present work extends the reductive decomposition and/or dissolution of a gold bearing arsenopyrite/pyrite flotation concentrate using metallic iron in a chloride medium. The work focuses on the factors that enhance desulphurization and the recovery of precious metals, namely gold and silver from the selected sulphide concentrate.