The formation of traditional V extraction from coal stone is reviewed in Hunan Province.The paper described several currently applied new processes for V extraction from coal stone.Suggestions are put forward for further development of V extraction from the coal stone.

Description is made of the new stripping in serial column for ion exchange W extraction.Comparison is made between the new process and the traditional single column stripping,Practice showed that the stripping in serial columns is much more superior to single column stripping in respect of operating efficiency,economic benefits and product quality.

The paper described the characteristics of micro sized and submicro sized sticky particles during filtering and washing,especially detailed on the property of the high efficient precise micro porous filter and successful operation of filtering and washing of micro sized particles.

Overall description is made of the make up and characteristics of America electrical furnace with rotary tube designed by Harper International Corp,for paramolybdenium calcination and MO 3reduction

The paper briefly described the improvement of the process and equipment for cemented carbide mixture preparation.

The paper described the ways of evaluation of information resource on Internet.Some examples are given of several oversea special web sites.Preliminary investigation is made on its feature and potential development as well as the website construction in the field.

Study is made on the process and equipment of continuous distillation and concentration of high acid RE strip liquor. The results show that the use of the patented porous micro circulation, double effect continuous evaporator (made of quartz and with electric tube internal heating function) allows not only for continuous distillation and concentration of RE strip liquor, but also HCl recovery. The said equipment features good technical coordination of the high acid RE strip liquor in RE grouping and separation,lower cost and higher recovery without environmental pollution.

The density of NdF 3 LiF melts was measured by Archimedes method in the present paper.The regression equation of the density dependence on the concentration of NdF 3 and temperature was gained by means of two factor quadratic regression orthogonal design.And the effects of the concentration of NdF 3 and temperature on the density of the melts were discussed.Moreover,the influences of the addition of Nd 2O 3 on the density were investigated.

The effects of bonding phase composed of Ni and Cu on the properties of the liquid phase sintered Mo W Ni Cu alloy were studied. The results show that the sintering temperature decreases and the alloy grain is spheroidized and is refined with the increase of Ni and Cu or the ratio of Ni to Cu.Under the condition of a given ratio of Ni to Cu, the ultimate tensile strength of the alloy increases rapidly and then decreases slow with the increase of Ni and Cu. Under the condition of a given amount of Ni and Cu, the ultimate tensile strength changes with the increase in the ratio of Ni to Cu also so.When the ratio of Ni to Cu is 2.4, the amount of Ni and Cu is 6%wt, sintering temperature is above 1 380 ℃ , in the liquid phase sintered Mo based alloy there are few poles, the ultimate tensile strength can reach 1 100 MPa, the grain is cobble stone form.

对制备高松装密度氧化铌工艺进行了研究。结果表明 :采用我厂未经任何特殊处理的普通萃取泥液所制的Nb(OH) 5或Nb2 O5为原料 ,通过整形、高温凝聚和筛分等工艺过程 ,制出的氧化铌的松装密度可达 1 1g/cm3以上。