Chen Hai-qing

The effects of three dispersants(PVP,Triammonium citrate,β-Alanine) on the stability of ITO suspension prepared by ball milling dispersion were studied.The influences of dispersing time and dispersant content on stability of ITO suspension were investigated.And the roles of the different dispersant and their dispersing mechanism on stability of ITO suspension were also investigated.The results show that the stability and dispersion mechanisms of the three dispersants are electrostatic and steric hindrance,and make ITO suspension keep RSH10% within 15 days under the conditions that the dispersant/ITO powder is 5%(mass ratio) and optimal ball milling dispersion time is 48 h.The sequence of effects of these three dispersants on the stability of ITO suspension is PVPβ-alaninetriammonium citrate,which is in agreement with the sequence of their acidity and alkalinity in the suspension.Among these three dispersants,PVP is the best one for the stability of ITO suspension.

Suspension

Dispersion stability

Alkalinity

Study on Cobalt and other Valuable Metals Recovery from Cobalt Sludge

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The hydrometallurgy technics of Zinc system in the Northwestern Lead and Zinc Smelter uses the purification of reverse adding Antimony salt to get rid of the impurity in the Zinc Sulfate solution.The paper studies the technics of how to receive Cobalt and other valuable metals from the slag of the two-segment purification.The Cobalt slag is selective leaching with diluents Sulfuric Acid,then we can get Cobalt,Cadmium,Nickel,Zinc from the solution and recover the Copper and Lead from the leached residue.The each recovery of Copper,Lead,Cobalt,Cadmium,and Zinc could reach to 100%、100%、90.33%、96.80%和95.51% in all.

Cobalt extraction techniques

Hydrometallurgy

Study on the Strengthening Depletion of Copper from Copper Smelter Slag by Pyro-process

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The strengthening depletion of Copper from Copper smelter slag by a new pyro-process was studied,which consists of reduction-sulfuration-stirring-heating.The content of Cu in Copper smelter slag can be reduced from 1.277% to 0.466% in the demand of smelter waste slag when a certain amount of Pyrite and coal was added,and the temperature of the dilution furnace hearth with its optimum structure was kept at 1 300 ℃,at the same time the slag was stirred and defecated with air blowing.

Slag (welding)

Copper slag

Flash smelting

Study on Improvement of Recovery of Gold and Silver from the Copper Dross Smelting in Reverberatory Furnace

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Hunan Nonferrous Metals (2007)

A novel technology of substituting Lead Concentrates for sulphidizer reverberatory furnace smelting is put forward according to the characteristics of low Sulfur content and high Copper content of Copper dross in a smelter.The results of test showed that the recovery of Lead,Gold and Silver increased by 4.14%,5.2% and 5.89% respectively;Copper in the matte reached up to more than 33%;the content of Lead,Gold and Silver in slag is reduced.

Dross

Slag (welding)

Copper extraction techniques

10.2991/ssemse-15.2015.116

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Chen Hai-qing Jun Lan

This research statistically analyzes the problems of Shanghai leisure sports industry in the post- world expo era by the Integrated 4 Traditional Chinese Diagnoses (abbr. I4TCD). Then it is suggested that the development ways of Shanghai leisure sports industry be the municipal government providing a platform, the enterprises playing the vital role, and the social organizations participating actively. KEYWORD: leisure sports industry; Shanghai; the Post-EXPO Era; the Integrated 4 Traditional Chinese Diagnoses

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Study on Novel Technology of Copper Dross Smelting with Soda-lead Concentrate

Nonferrous Metals (2007)

A novel technology of soda-lead concentrates reverberatory furnace smelting is put forward according to the characteristics of copper dross with low sulfur and high copper content.The results show that the recovery of lead,gold and silver increased by 10.75%,19.86% and 12.82% respectively;copper in the matte reached up to more than 28%;the output of As-Cu-Pb alloy was reduced obviously; the operating condition of the furnace was also improved.

Dross

Copper extraction techniques

Lead smelting

Lead (geology)

Pyrometallurgy

Effects of methyl cellulose on stability of ITO aqueous suspension and its dispersion mechanism

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Journal of Central South University(Science and Technology) (2007)

Indium tin oxide(ITO) aqueous suspension was prepared through ball milling dispersion using Methyl cellulose(MC) as dispersant.The effects of MC dosages,ITO content and ball milling dispersion time on stability of ITO aqueous suspension were investigated.And the functional mechanism of MC for dispersing ITO suspension was also discussed.The results show that MC is a good dispersant for preparation of stable ITO aqueous suspension through ball milling dispersion,and its mechanisms of stability and dispersion are electrostatic and steric hindrance.When the mass ratio of MC and ITO is a constant,the stability of ITO suspension enhances with the increase of MC dosages,ITO content and ball milling dispersion time.And ITO aqueous suspension possesses the best stability and R1.8% within 120 d when mass ratio of MC to ITO is 15.0% and ball milling dispersion time is 48 h.

Suspension

Indium tin oxide

Hydroxypropyl cellulose

Dispersion stability

Aqueous suspension

Study on Gold and Silver Recovery from the As-Cu-Pb Alloy Produced by Copper Dross Smelting with Soda-Lead Concentrate in a Smelter

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Hunan Nonferrous Metals (2007)

Soda-Lead concentrates smelting process was put forward according to the characteristics of As-Cu-Pb alloy produced by Copper dross smelting with Soda-Lead concentrate in a smelter.The results show that the recovery of Lead,Gold and Silver are 93.36%,91.02% and 69.38% seperately,and the recovery of Copper in matte is more than 98% when the ratio of Lead concentrate to alloy is 230%.

Dross

Lead smelting

Pyrometallurgy

Study on Process-parameters and Practice of QSL Lead Smelting-process in China

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QSL Lead smelting-process has the advantages of high utilization of Sulfur and meets the requirements of environmental protection.It has found industrial applications in Germany and South-Korea.In this paper,the second trial production by QSL Lead smelting-process in Northwest Lead and Zinc Smelter in China was introduced,and main process-parameters were studied.At present,under stable process conditions,the production results were as follows:the direct recovery of Lead was up to 93.52%;the concentration of SO_2 out of flue gas from the outlet of electrostatic precipitator was up to 5.3%,which meets the requirements of the production of Sulfuric Acid.

Lead (geology)

Electrostatic precipitator

Lead smelting

Zinc smelting

Zinc and Cobalt Recovery from the Sludge Produced during Purification of Zinc Sulfate Solution

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Northwestern Lead and Zinc smelter uses two stages purification to remove impurities in Zinc Sulfate solution of the Zinc system.In this paper a process is investigated to recovery of Zinc and other valuable metals from sludge resulted from the second purification stage.The process consists of dispersing the sludge with water and selective leaching with diluents Sulfuric Acid.Laboratory tests of 1 kg sludge scale,scale-up tests of 15 kg sludge scale were carried out.Test results show that more than 95% Zinc enters the solution and more than 90% Cobalt remains in the residue if the solution pH is kept above 3.5 during the leaching and below 4.5 at the end of leaching respectively.The resulting solution is returned into main process to recover Zinc and the residue can be processed to recover Cobalt and other valuable metals.

Residue (chemistry)