Jun Ping Meng

Research Progress on Resource Utilization of Iron Tailings and its Development Trend in China

The treatment of iron tailings has been a global issue, which has bought serious impact on the environment, it was considered to be a potential threat to human lives. In the present paper, the development situation of iron tailings utilization in China is investigated, the problems existed is analyzed and suggestions are provided, which are hoped to be valuable in the future research and the development of functional materials and products. Keywords: Iron tailings, resource utilization, functional materials, environment protection

Researches and Development of Activated Water and its Effects on Biological Growth

Activated water is beneficial to healthcare due to its changes of physicochemical properties compared to ordinary water. Some related researches on activated water are reviewed in this paper. Take magnetized water, mineral and ceramic activated water and electrolyzed water for examples, activating materials and technologies are briefly introduced. Then, mechanism of activation devices and activated water are summarized and discussed. Finally, mechanism of activated water on biological growth is analyzed by comparing their different properties.

Electric Dipole Characteristics of Mineral Tourmaline Superfine Powders and its Properties of Far Infrared Emission

According to the hypothesis that the tourmaline particle is composed of crystal electric dipoles, the far infrared emission and its vibration frequency of the natural black tourmaline superfine powders were researched. The behavior of the electric dipole in the ground and excitation states was calculated. It was found that there is a relationship between infrared absorption spectra and the microscopic D-value of electric dipole moment. The high far infrared emissivity of tourmaline was ascribed to the coherent light created by stimulated emission between different excitation states of electric dipole.

Effect of Heat Treatment on Properties of Mineral Attapulgite

Mineral attapulgite powders were heat treated at different temperature from 100°C to 800°C. The effect of heat treatment on properties of attapulgite were studied by particle size distribution, surface free energy, and water vapor adsorption performance. The results show that the medium particle size and surface free energy of attapulgite increase and hygroscopic capacity promptly reduce with the increase of heat temperature .The medium particle size of the raw palygorskite is 3.09 μm, and it becomes 14.12 μm after heat treatment at 800 °C. The surface free energy, polarity component and dispersion component of the natural attapulgite are 45.16mN•m-1, 13.92mN•m-1, 31.24mN•m-1, respectively, and they become 116.22 mN•m-1，116.22 mN•m-1，0.0 mN•m-1 after heat treatment at 800°C. Moreover, the hygroscopic capacity of attapulgite in 24h decreases from 17.1 % to 5.6% after heat treatment at 800°C.

Testing Method of Infrared Emissivity Used in Powders Industry

The test apparatus of infrared emissivity used in powders industry was researched by controlling the temperature accurately and collecting the signals of surface temperature of two standard samples and a test sample. The tourmaline samples from ten mines had been tested by the new test apparatus. Compared with the results from FTIR, it was shown that average value of relative error was 0.378% and repeatability error was less than 0.6% after correcting by the coefficient kc = 0.958.

Testing Method of Spontaneous Polarity Used in Powders Industry

By fitting calculation of functional relationship between charge quantity and temperature on condition that powders were shielded, a device was proposed to measure spontaneous polarity of powders, and samples of typical tourmaline were measured. The results showed when tourmaline powders of different origins were heated to 80, minimum value of spontaneous polarization strength was 3.204×10-4C/m2, and maximum value was 1.53×10-3C/m2. The conclusion was in accord with results got from crystal structure analysis, and repeatability r was 1.726×10-6C/m2 with 95% confidence probability.

Theoretical Calculation for Far Infrared Emissivity of Tourmaline Powder Materials

The chemical composition of tourmaline crystal structure was investigated by using Diamond software and the relationship between the far infrared emissivity and the parameters of composition, structure and particle size of tourmaline materials was analyzed, and then four effective factors on the infrared emissivity were determined. By analyzing the effect of the variables on the emissivity, an effective function of the single variable on the emissivity was set up. Considering the weight coefficient of each factor, a calculation model on the far infrared emissivity of tourmaline was built up. Using this theoretical model, the method to improve the far infrared emission was discussed.

Phenol Degradation in the System of H2O2/Porous Tourmaline Composite Materials

Porous tourmaline composite material (PTCM) was prepared mainly by schorl and used to catalyze hydrogen peroxide for the removal of phenol. The optimum reaction conditions were determined by testing the phenol removal rate under the conditions of different initial phenol concentration, hydrogen peroxide dosage, PTCM dosage and temperature. The reaction activation energy was calculated to be 32.148KJ/mol, indicating that PTCM showed good effect on catalyzing hydrogen peroxide, phenol could be degraded quickly and the removal rate could reach 97%. The mechanism of the system was the Fenton-like reaction

Effect of Ion Migration of Multiple Copper-Zinc Alloy on the Crystal Structure of Calcium Carbonate Scale

Multiple copper-zinc alloy was used to treat water in order to restrict the formation of hard scale during heating process. Trace amounts of metal ions were dissolved from the alloy under the action of tiny battery corrosion, which took part in the crystallization of calcium carbonate crystal. The ion migration rules and its effect on the crystal structure of water scale were studied. The ICP test results show that after immersion in the water for 20 min, the zinc ion concentration increased to 0.35 mg•L-1 compared with contrast group. The simulating experiment of the scale crystal growth demonstrated that the calcium carbonate scale after treated with the alloy showed a transformation from calcite to aragonite, and the ratio of calcite to aragonite changed from 1:0.125 to 1:2.30. Meanwhile, the heat transfer efficiency was increased to 2.19%.

Research and Application of Micro-Environmental Control Technology in Animal Breeding Industry

Influence of micro-environmental factors in animal breeding room on healthy growth of animal was discussed, such as harmful chemical gas, drinking water, microorganism, temperature, humidity and noise. Main products and technologies used in improving animal breeding micro-environment were summarized from four aspects including deodorization, activating drinking water, adding feed additives, using temperature and humidity control devices. At last, the development trends of micro-environment control were proposed in large-scale animal breeding.