The mathematical model for the cold rolling force of titanium plate is studied to control the technological parameters. Based on Maple software, titanium plate cold rolling experiments and multivariate nonlinear regression,average titanium plate rolling pressure model is obtained and then rolling force model is established. Compared with the measured value of titanium plate rolling force, the average relative error of the calculated value from the model is 8.0 %.

Quality control is discussed in respect of material selection, carbonization process and pulverization classification during the production of high-quality ultrafine WC powders by conventional process. Some methods to measure the particle size of ultrafine WC powders are compared. The results show that the BET measured value is the closest to the actual particle size.

The silver in the supernatant,produced from copper anode slime pretreatment is recovered by silver precipitation with NaI-transformation with Na2 S and then HNO3. And the optimal process conditions are determined. The results show that the silver recovery canreach 96.56% ,the silver content in the precipitated Ag solution is reduced down to 4 mg/L and the purity of crude silver is above 95%.

The mass fraction of the hydrogen in high-purity titanium metal was determined by high frequency induction-thermal conductivity method. The influences of induction current, crucible material, fluxing agent,blank value,minimum analysis time and sample weight on the determined result were emphatically discussed. And a method to determine the hydrogen in high-purity titanium metal was established. The results show that the relative standard deviation of the hydrogen mass fraction determined by the above method is 6. 3%, and the recovery of standard addition is 98%-106%. The determination conditions of partial hydrogen content in titanium metal were studied by a combined analysis program. Based on peak separation experiments, each partial hydrogen content was calculated.

Tantalum wires were heated and melted with different methods, and their oxygen contents were measured by pulsed oxygen coulometric determinator. The results show that nickel bath has good fluxing effect on tantalum wires and can effectively reduce the blank value during oxygen measurement,resultingin a lower detection limit of 0.006 %. The RSD of measured values is less than 4.0 %. With nickel bath as the fluxing agent,coulometric determination is credible and accurate enough foroxygen analysisin Ta wire production.

Some technologies for APT crystal mother liquor treatment are summarized, and the relatively reasonable and effective ones are emphatically introduced. The basic principle,process flowsheet and application effect of these technologies are reviewed, and their future development trends are also prospected.

The latest development of the preparation of one-dimensional Bi2 S3 nanopowder is reviewed,including high-temperature solid state synthesis, hydrothemal （solvethermal） synthesis, sonochemical synthesis,microwave-assistant synthesis, and atmospheric boiling and refluxing synthesis. And the development trend of the synthetic technique is also prospected.

The latest development of such anode materials as metal tin,Sn-based alloy and tin oxide are reviewed. The problems presented in the current study of the above anode materials are also analyzed. Multicomponent composite Sn-based alloy with a multiple buffer structure and nanometer-sized composite tin ox- idewill be the main Sn-based anode materials of lithium ion batteries.

Some cobalt recovery processes from Co-based alloy scraps are introduced. Based on the technical characteristics,these processes are briefly reviewed.

The equipment and mechanism of surface nanocrystallization by high energy shot peening are introduced. Description is made of the influence of the nanocrystallization technology on the surface crystal grain distribution, mechanical property and biological activity of pure titanium.