The Beneficiation of the Barite Ore in China

2014 ◽  
Vol 644-650 ◽  
pp. 5368-5371
Author(s):  
Hong Jun Wang ◽  
Hui Xin Dai ◽  
Wei Lin Yang ◽  
Ting Ting Li
Keyword(s):  
Mineral Processing ◽  
Flotation Reagents ◽  
Different Types

This paper elaborates the beneficiation methods of barite, flotation reagents and different types of mineral processing of barite.

Overview on the Treatment Technology of Wastewater from Copper Mineral Processing (WCMP)

2013 ◽  
Vol 750-752 ◽  
pp. 1369-1372 ◽  
Author(s):  
Shu Zhao ◽  
Ji Ze Pan
Keyword(s):  
Suspended Solids ◽  
Mineral Resources ◽  
Mineral Processing ◽  
Ecological Environment ◽  
Treatment Technology ◽  
Flotation Reagents ◽  
Copper Mineral ◽  
Treatment Techniques ◽  
Exploitation And Utilization ◽  
Large Numbers

During the exploitation and utilization of the mineral resources, varieties of pollutants have been produced, which would impact the natural environment inevitably and bring many adverse effects to ecological environment and the human health. Its worth noting that the wastewater from copper mineral processing (WCMP) is one of the main source of mine environmental pollution. The WCMP is characterized by large quantity and containing large numbers of suspended solids, residual flotation reagents and heavy metals, etc. Wastewater can be discharged and realized reuse only after effective treatment. Recently, natural sedimentation, neutralization, flocculation, oxidation and other treatment techniques by wastes are the commonly used methods to treat the mineral processing wastewater.

The Progress of Mineral Processing Technology of Lead-Zinc Mine in China

2015 ◽  
Vol 737 ◽  
pp. 874-877
Author(s):  
Yu Chen ◽  
Shu Ming Wen ◽  
Yi Jie Wang ◽  
Qi Cheng Feng ◽  
Jin Lin Li ◽  
...  
Keyword(s):  
Technological Process ◽  
Mineral Processing ◽  
Processing Technology ◽  
Flotation Reagents ◽  
Lead Zinc ◽  
Zinc Mine

This paper discusses the progress of lead-zinc mineral processing technology and flotation reagents of China, and proposes that optimize technological process and develop new reagents are the main directions.

Flotation Separation of High Sulfur Lead-Zinc Ore

2012 ◽  
Vol 454 ◽  
pp. 205-209 ◽  
Author(s):  
Zhi Tao Yuan ◽  
Xiao Long Yu ◽  
Li Ping Liu ◽  
Cheng Liang Wang
Keyword(s):  
Experimental Studies ◽  
Closed Circuit ◽  
Test Results ◽  
Flotation Reagent ◽  
Flotation Reagents ◽  
Selective Flotation ◽  
Different Types ◽  
Lead Zinc ◽  
Process Flowsheets ◽  
Zinc Concentrate

According to the refractory lead-zinc ore properties with high pyrite, the experimental studies were conducted on floatation reagent conditions and closed circuit tests for comprehensive recovering of all types useful minerals. In comparison to the test results of different process flowsheets and different types of flotation reagents, adopting prior flotation lead (Pb)—Zn selective flotation (reagent removal and regrinding of rough concentrate)—S-selective flotation with Zn-tailings. The closed circuit tests were achieved: the grade of lead concentrate was 50.55% with a recovery of 92.25%; The grade of zinc concentrate was 40.12% with a recovery of 85.82%; The grade of sulfur was 48.58% with a recovery of 56.59%; The tailings grades of lead, zinc and sulfur were 0.27%, 0.31%, 3.90% respectively.

Recovery of Fine Cassiterite from Tin Tailings Slime by Froth Flotation

2013 ◽  
Vol 634-638 ◽  
pp. 3478-3483 ◽  
Author(s):  
Zhuo Yue Lan ◽  
Yong Cheng Zhou ◽  
Xiong Tong
Keyword(s):  
Fine Particles ◽  
Froth Flotation ◽  
Eastern China ◽  
Mineral Processing ◽  
Laboratory Scale ◽  
Processing Plant ◽  
Flotation Reagents ◽  
Flotation Process ◽  
South Eastern

Tin gravity slime tailings of Datun mineral processing plant in south-eastern China contains fine and ultrafine cassiterite. Tin recovery from the slime tailings was studies in the presence of different flotation reagents. A flotation process has been used on a laboratory scale to investigate the effect of various reagents such as collectors, auxiliary collector, activators, ect., and theirs dosages in neutral flotation environment. To reach an optimum tin recovery, different dosages of the reagents were also studied. Due to cassiterite is friable and a large amount of fines and slimes were generated. Usually de-sliming is used to prevent slime coating and to increase the recovery of tin. However, analyses have shown that fine particles in the sample mostly contain tin, thus de-sliming was not suggested. By applying the process, ultrafine cassiterite can be efficiently recovered from the tailings slime by one rougher process, and the concentrate assaying 1.20% Sn with a recovery of 89.10% was obtained.

Separation Test of Andalusite Ore Containing Carbon from Fengcheng City Liaoning

2012 ◽  
Vol 454 ◽  
pp. 279-284 ◽  
Author(s):  
Nai Ling Wang ◽  
Wan Zhong Yin ◽  
Zhen Ming Ji ◽  
Xi Mei Luo ◽  
Da Yong Sun ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Mineral Processing ◽  
Liaoning Province ◽  
Flotation Reagents ◽  
Petroleum Sulfonate ◽  
Separation Test

The paper studied on andalusite ore containing 6.58% carbon from FengCheng, Liaoning province for mineral processing. The study on the technical mineralogy of the ore showed that the main mineral were andalusite, biotite and quartz. The well results were obtained by adopting grinding-desliming-decarburization-flotation-magnetic separation and using sodium petroleum sulfonate as collecter. The mechanism of flotation reagents was analyzed in the end of the paper.

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj> 0 for eachj> 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

Differentiating between different forms of moral obligations

2020 ◽  
Vol 43 ◽  
Author(s):  
Rajen A. Anderson ◽  
Benjamin C. Ruisch ◽  
David A. Pizarro
Keyword(s):  
Moral Character ◽  
Moral Obligations ◽  
Different Types

Abstract We argue that Tomasello's account overlooks important psychological distinctions between how humans judge different types of moral obligations, such as prescriptive obligations (i.e., what one should do) and proscriptive obligations (i.e., what one should not do). Specifically, evaluating these different types of obligations rests on different psychological inputs and has distinct downstream consequences for judgments of moral character.

Ultrastructural Investigations of the Contractile Filaments of Amoebae

1974 ◽  
Vol 32 ◽  
pp. 188-189
Author(s):  
P.L. Moore
Keyword(s):  
Cytoplasmic Streaming ◽  
Three Dimensional ◽  
Freeze Fracture ◽  
Amoeboid Movement ◽  
Different Types ◽  
Chemical Conditions ◽  
Complete Interpretation

Previous freeze fracture results on the intact giant, amoeba Chaos carolinensis indicated the presence of a fibrillar arrangement of filaments within the cytoplasm. A complete interpretation of the three dimensional ultrastructure of these structures, and their possible role in amoeboid movement was not possible, since comparable results could not be obtained with conventional fixation of intact amoebae. Progress in interpreting the freeze fracture images of amoebae required a more thorough understanding of the different types of filaments present in amoebae, and of the ways in which they could be organized while remaining functional.The recent development of a calcium sensitive, demembranated, amoeboid model of Chaos carolinensis has made it possible to achieve a better understanding of such functional arrangements of amoeboid filaments. In these models the motility of demembranated cytoplasm can be controlled in vitro, and the chemical conditions necessary for contractility, and cytoplasmic streaming can be investigated. It is clear from these studies that “fibrils” exist in amoeboid models, and that they are capable of contracting along their length under conditions similar to those which cause contraction in vertebrate muscles.

Study of the Molecular Architecture of Keratin Filaments by Electron Microscopy

1982 ◽  
Vol 40 ◽  
pp. 118-119
Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun
Keyword(s):  
Electron Microscopy ◽  
Structural Organization ◽  
Cell Types ◽  
Structural Features ◽  
Molecular Architecture ◽  
The Past ◽  
Keratin Filaments ◽  
Different Types ◽  
10 Nm Filaments ◽  
Different Cell Types

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.

A New Defect in Polyethylene Single Crystals

1973 ◽  
Vol 31 ◽  
pp. 70-71
Author(s):  
E. L. Thomas ◽  
S. L. Sass
Keyword(s):  
Single Crystals ◽  
Screw Dislocation ◽  
Small Distance ◽  
Dipole Model ◽  
Dislocation Dipole ◽  
Chain Folding ◽  
Black And White ◽  
Polymer Crystal ◽  
Different Types

In polyethylene single crystals pairs of black and white lines spaced 700-3,000Å apart, parallel to the [100] and [010] directions, have been identified as microsector boundaries. A microsector is formed when the plane of chain folding changes over a small distance within a polymer crystal. In order for the different types of folds to accommodate at the boundary between the 2 fold domains, a staggering along the chain direction and a rotation of the chains in the plane of the boundary occurs. The black-white contrast from a microsector boundary can be explained in terms of these chain rotations. We demonstrate that microsectors can terminate within the crystal and interpret the observed terminal strain contrast in terms of a screw dislocation dipole model.

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