The more favourable technical conditions of producing enamel-covered wire insulating varnish with the waste polyester are determined,The temperature of alcoholysis is 240～245℃,time of circulating reflux is 7～7.5h ,time of polycondensate reaction is 2.5～3h ,vacuum degree is 0.4～0.94Kpa ,phenolysis time is 2h.
The more favourable technical conditions of producing enamel-covered wire insulating varnish with the waste polyester are determined,The temperature of alcoholysis is 240～245℃,time of circulating reflux is 7～7.5h ,time of polycondensate reaction is 2.5～3h ,vacuum degree is 0.4～0.94Kpa ,phenolysis time is 2h.
[Methods]To investigate on the spot that the waste electronic products take apart and recycle industry centres at 2 Villages from 6/2005 to 11/2005 in Puning.
The technologies of recovery and utilization of waste and used Zn-Mn battery have been reviewed. The mostly recovery products of waste and used Zn-Mn battery have been introduced.
The result showed that the energy waste by machining at micron is much lower than by heat grind and the high quality and long-slice wood fiber was gained.
The use of mixed cultures and renewable sources obtained from waste organic carbon can substantially decrease the cost of PHA and increase their market potential.
In this study, H-form oleoyl-carboxymethyl-chitosan (H-O-CMCS) was prepared as a coagulation agent to clean up the residual oil from the waste-water of oil extraction (WWOE).
The effects of temperature and time on polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) distribution in fly ash of a municipal solid waste incinerator (MSWI) were studied in a tubular oven under nitrogen atmosphere.
In this part, the kinetics of changes in the weight of formed and wasted corrosion products of carbon steel, zinc, copper, magnesium, aluminum, and alloys Д16, AMц, and brass is considered.
In gasoline fueled vehicles (GFVs), about 40% of fuel energy is wasted in exhaust heat, while a smaller amount of energy (30%) is ejected through the engine coolant.
In this study, H-form oleoyl-carboxymethyl-chitosan (H-O-CMCS) was prepared as a coagulation agent to clean up the residual oil from the waste-water of oil extraction (WWOE).
When grown in a medium containing a water-soluble fraction of lignin pyrolysis waste at concentrations from 0.5 to 2%, it consumes 62-72% of the phenolic components of the waste.
The vitreous materials are characterized by a high chemical durability, which decreases only at high contents of the waste oxides (55 wt % and higher) due to the formation of an additional nepheline phase.
The highest tariffs are charged for toxic waste and used oil.
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This paper is an investigation of the technology on repairing the failed cold forming rolls by hardfacing 3Cr2W8V on surface of the rolls with 260 flux and then by heat treating the hardface layer,and the influence of heat treatment on the distribution of alloy elements, the structure, the phase composition and the property of hardfacing layer from the point of view of metallography.The program performed to prevent deforming and cracking during quenching and to obtain suitable surface character can satisfy ...
This paper describes a successful example of demolition of a reveiewing stand at Drum-Tower in Nanjing by controlled blasting where is a heavy traffic downtown area with dense population and buildings.The charge placements,calculation of charge amount,design of electric firing circuits,operation safety protections,effects and etc,are summarized.Some experience are provided.
The authors conduct an investigation on used valve balls of sucker rod pumps by means of microscope, scanning electron microscope and electron probe, prove that the interaction of corrosion, abrasion and fatigue is the dominant cause of valve ball failures, and assert that the main way to improve the service life of valve balls is to provide high corrosion-and abrasion-resistant properties of the pall materials.
废旧
waste
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