Flotation Behavior of Smelting Abandoned Copper Slags

2013 ◽  
Vol 734-737 ◽  
pp. 1045-1048
Author(s):  
Xiao Mu ◽  
Duan Kang ◽  
Jian Hua Chen
Keyword(s):  
Recovery Rate ◽  
Sodium Sulfide ◽  
Experimental Results ◽  
Flotation Recovery ◽  
Flotation Behavior

The flotation of smelting copper slags in Yunnan has been studied in this paper. The influences of grinding fineness, different kinds of collectors and the dosage of sodium sulfide, GZT, which influence the flotation results, are tested. The experimental results show that in the first stage of roughing, a good flotation result is obtained, the concentrate copper grade reaches 24.12% and the flotation recovery rate reaches 82.98%, when the grade of copper slags is about 2.1%, under the circumstances that the grinding fineness is 85.6%, the amount of Y-89 is 400g/t, the amount of sodium sulfide is 2500g/t, and the amount of GZT is 80g/t.

Sulfidisation Promotion Effect of Ammonium Sulfate on Flotation of Copper Oxide Ore

2012 ◽  
Vol 524-527 ◽  
pp. 1109-1114
Author(s):  
Dian Wen Liu ◽  
Jian Jun Fang ◽  
Xiao Lin Zhang ◽  
Shu Ming Wen ◽  
Zhi Cong Wei ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Ammonium Sulfate ◽  
Sodium Sulfide ◽  
Pure Copper ◽  
Sem Images ◽  
Promotion Effect ◽  
Flotation Recovery ◽  
Oxide Minerals ◽  
Sulfide Ions

This paper presents the sulfidisation promotion effect of ammonium sulfate on the sulfidisation flotation of both malachite and copper oxide ores. Copper oxide ores are commonly difficult-to-float due to its molecular structure, and adding sodium sulfide as activator is necessary; however, its dosage to the flotation pulp must be strictly controlled, as it is also a powerful depressant for copper sulfide minerals, and will, if in excess, depress the activated copper oxide minerals. This depression will be alleviated while ammonium sulfate is added, as it accelerates the speed of sulfidisation, and alleviates excessive sulfide ions on the depression of copper oxide minerals. Ammonium sulfate, therefore, may be a sulfidisation promoter, and plays a role of sulfidisation promotion effect; it makes the coating of sodium sulfide on the ore surface more dense and stable, which is ready for xanthate adsorption on the surface of copper oxide minerals. The results of experiments show that the flotation recovery is increased 12.28% while ammonium sulfate is added in the presence of excessive sodium sulfide in the pulp, and the highest recovery is obtainable when the ammonium sulfate and sodium sulfide are in the same dosages. The sulfidisation promotion effect of ammonium sulfate is confirmed by pure copper oxide mineral flotation test and copper oxide ores flotation test, as well as by SEM images of floated malachite.

scholarly journals Influence Mechanism of Magnetized Modified Kerosene on Flotation Behavior of Molybdenite

Minerals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 2
Author(s):  
Hui Li ◽  
Wei Xiao ◽  
Jianping Jin ◽  
Yuexin Han
Keyword(s):  
Theoretical Explanation ◽  
Ultraviolet Spectrum ◽  
Liquid Viscosity ◽  
Carbon Chains ◽  
Flotation Recovery ◽  
Mineral Flotation ◽  
Influence Mechanism ◽  
Oil Water ◽  
Flotation Behavior

The effects and mechanism of magnetized kerosene on the flotation behaviors of molybdenite were studied by micro-flotation, ultraviolet spectrum, infrared spectrum, surface tension, and liquid viscosity. According to the results of micro-flotation, magnetized kerosene improved the flotation recovery of molybdenite, and the improvements were more obvious with smaller molybdenite particles. Spectral analysis showed that the magnetization did not change the chemical composition of kerosene, but transformed the linear aliphatic hydrocarbons in kerosene into linear isomers and reduced the lengths of the carbon chains. Moreover, the magnetization reduced the viscosity of kerosene and oil/water interfacial tension, and improved the dispersion of kerosene in the pulp. The external magnetic field transformed the disorder of the additional magnetic moment in the kerosene molecules into order, and reduced the compactness of the kerosene molecules. The experimental results provided a theoretical explanation for the role of magnetization in mineral flotation.

A study on mechanical properties after bonded repair of sandwich composite materials

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040033 ◽  
Author(s):  
Sunghoon Kim ◽  
Jongrok Ha ◽  
Seongwon Yoon ◽  
Myunghyun Kim
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Composite Materials ◽  
Recovery Rate ◽  
Fatigue Tests ◽  
Experimental Results ◽  
Sandwich Composite ◽  
Bonded Repair ◽  
Patch Repairs ◽  
The Difference

In this paper, an experimental study was conducted to determine the efficiency of repair methods for sandwich composites used as hull materials in leisure ships. The method was applied to external, scarf, and step patch repairs using an epoxy bond. The load was described in terms of the hogging and sagging moments applied to the hull by waves. Static and fatigue tests were performed to derive the recovery rate of repaired specimens. The experimental results indicated that the recovery rate of specimens with the scarf patch was the highest at 91.80% when the hogging moment was applied. However, the difference in the recovery rate between hogging and sagging moments was the lowest for specimens with the step patch, and the recovery rate was high at 89.96% and 85.15%, respectively.

Flotation of Copper Oxide Minerals Using Ethylene Phosphate as Activators

2012 ◽  
Vol 581-582 ◽  
pp. 975-982
Author(s):  
Xiao Feng Yang ◽  
Quan Jun Liu ◽  
Rong Dong Deng
Keyword(s):  
Copper Oxide ◽  
Recovery Rate ◽  
Sodium Sulfide ◽  
The Other ◽  
Test Results ◽  
Copper Ore ◽  
Good Test ◽  
Activation Effect ◽  
Oxide Minerals

Studying on difficulty of copper oxide`s flotation, the activation of new pharmaceutical KLY refractory copper oxide ore achieves better test results than the other activator. The final recovery rate of copper ore is 83.99% and the copper grade of concentrate is 22.87%.Through the mechanism of the test shows that the improved ethylene phosphate plays a major role for the activation, which not only has strong chelation, good activation effect but also reduces the amount of sodium sulfide; moreover, it develops good test indicators.

Improvement of the chemical recycling process of waste carbon fibre reinforced plastics using a mechanochemical process: Influence of process parameters

2018 ◽  
Vol 36 (10) ◽  
pp. 952-964 ◽  
Author(s):  
Antony Mutua Nzioka ◽  
Cao Zheng Yan ◽  
Myung-Gyun Kim ◽  
Ye-Jin Sim ◽  
Chang-Soo Lee ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Recovery Rate ◽  
Experimental Results ◽  
Chemical Recycling ◽  
Recycling Process ◽  
Influence Of Process Parameters ◽  
Mechanochemical Process ◽  
Reinforced Plastics ◽  
Process Factors ◽  
Carbon Fibre Reinforced Plastics

We present the experimental results of an optimal recycling method for waste carbon fibre reinforced plastics (CFRPs) that is based on the application of a set of unit mechanochemical processes. The objectives of this study were to highlight the influence of process factors that are inherent in the chemical recycling process of waste CFRP. We investigated the influence of the soaking period, the application of a catalyst and impurities on the recycling process and recovery efficiency of the waste CFRP. Different combinations of the unit mechanochemical processes were investigated, and the effectiveness of the combination was analysed. The chemical recycling process was conducted using benzyl alcohol under ordinary pressure at initial solvent temperatures lower/equivalent to its flash point temperature. Experimental results showed that the solvent temperature increased up to boiling temperature levels when the mechanochemical process was initiated, thereby enhancing the mechanochemical process. The presence of impurities did not influence the recovery rate. Likewise, this experimental study highlighted the importance of accounting for the soaking period during the chemical recycling process: an extended soaking period resulted in a higher recovery rate, a lower portion of undissolved solids and recovered fibres of better quality. This research highlighted the significance of choosing the proper combination for the chemical recycling process as well as the benefits of recycling the waste CFRP with negligible application of the catalyst.

Beneficiation of a Low-Grade Flaky Graphite Ore from Australia by Flotation

2015 ◽  
Vol 1090 ◽  
pp. 188-192
Author(s):  
Xin Zhang ◽  
Ling Yan Zhang ◽  
Yang Shuai Qiu ◽  
Xin Qu
Keyword(s):  
Recovery Rate ◽  
Closed Circuit ◽  
Low Grade ◽  
Flotation Reagents ◽  
Pine Oil ◽  
Flotation Recovery ◽  
Flotation Method

The graphite ore from Australia is a sort of the low-grade and fine-scaled graphite ore. On the basis of the optimum rough grinding fineness, an open and a closed circuit tests were conducted which consist of one rougher, one scavenging, then four-time-regrinding and five-time-cleaning to the rough concentrate, one grinding and scavenging to the mixture of middling1~3, and the middling4~6 returned to the rougher, cleaning1 and cleaning2 respectively. Taking the kerosene, pine oil, lime as flotation reagents, the concentrate with grade improvement from 12.78% to 90.5% was achieved through the routine flotation method, as the flotation recovery rate reached to 92.46%.

Testing Flotation Recovery Rates

1982 ◽  
Vol 47 (1) ◽  
pp. 127-132 ◽  
Author(s):  
Gail E. Wagner
Keyword(s):  
Recovery Rate ◽  
Papaver Somniferum ◽  
Poppy Seed ◽  
Recovery Rates ◽  
Recovery Test ◽  
Sample Contamination ◽  
Flotation Recovery ◽  
Poppy Seeds

The poppy seed recovery test is a simple and inexpensive means of determining the effectiveness and consistency of any particular botanical flotation system. By adding a known number of charred poppy seeds (Papaver somniferum) to a sample before it is processed, archaeologists can check for loss, damage, and inter-sample contamination. Different systems, equipment, methods, and personnel tested since 1976 yield recovery rate percentages ranging from 6% to 98%. Such percentages provide a basis of comparison among widely differing flotation systems and enable the archaeologist to decide which flotation system to use under particular logistical constraints.

Research on Purification Technics of some Flake Graphite

2013 ◽  
Vol 753-755 ◽  
pp. 119-123 ◽  
Author(s):  
Shu Fang Ding ◽  
Yan Ping Niu
Keyword(s):  
Carbon Content ◽  
Recovery Rate ◽  
Technology Development ◽  
New Technology ◽  
Experimental Results ◽  
Graphite Flake ◽  
Flake Graphite ◽  
Property A ◽  
Fixed Carbon ◽  
Fixed Carbon Content

Graphite is the very important nonmetallic ore that high and new technology development needs. According to the ore property, a purification technics of some flake graphite was studies. Firstly, the experiment researched the primary grinding fineness condition test, its result showed that grade has good and recovery is more high when coarse grinding fineness-200 mesh is 66.4%. Then on the basic of the test, a closed trial was conducted by five-times-regrinding and six-times-cleaning, the experimental results indicated that the grade of graphite (Fixed carbon content) is 89.48%, recovery rate reached 97.42%, separation index is better. Finally, the analysis of products showed that fixed carbon content of +100 mesh, +200 mesh graphite flake is respectively 92.90% and 90.53%, so we can choose the multi-grade graphite product.

Dual effects of sodium sulfide on the flotation behavior of chalcopyrite: I. Effect of pulp potential

2014 ◽  
Vol 21 (5) ◽  
pp. 415-422 ◽  
Author(s):  
Bijan Taheri ◽  
Mahmoud Abdollahy ◽  
Sied Ziaedin Shafaei Tonkaboni ◽  
Soheyla Javadian ◽  
Mohammadreza Yarahmadi
Keyword(s):  
Sodium Sulfide ◽  
Pulp Potential ◽  
Flotation Behavior

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

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