35results about How to "Increase the rate of the reduction reaction" patented technology

The method for reducing and dechlorinating chlorinated organic substances in water by surface-modified catalytic iron relates to the reductive dechlorination treatment technology for chlorinated organic pollutants in water bodies, and reduces the concentration of chlorinated organic pollutants Toxicity and pollution, suitable for the control of water pollution and the restoration of polluted water. The present invention first catalyzes the surface of the iron used for water treatment through electroless copper plating to improve the reducing ability of iron, and then uses a surfactant to modify the surface of the copper-plated iron to change the hydrophilicity and lipophilicity of the iron surface Features, increase the dissolution and adsorption of organic matter on the iron surface, improve the mass transfer conditions of organic matter transfer to the iron surface, and significantly increase the reaction rate. The method of the invention adopts simple equipment, convenient operation and management, and low cost. Except for the power consumption of the water pump, there is no other energy consumption. Therefore, the method of the invention is a method with low energy consumption and high efficiency, which is beneficial to popularization and application.

The invention discloses a rapid reduction process of a rotary kiln for laterite nickel ore. The rapid reduction process of the rotary kiln for the laterite nickel ore includes the following steps that laterite nickel ore and a composite adding agent are mixed and then are pressed into block masses, and the composite adding agent comprises pulverized coal and limestone; the block masses are dried and pre-heated, and then enter the rotary kiln, reduction coal is added in, and reduction is performed under the reduction atmosphere so that reduced products can be obtained; the reduced products are cooled, screened and magnetically separated so that magnetic products can be obtained; and the magnetic products are crushed, subjected to ore grinding and magnetically separated, and high-nickel concentrate is obtained. According to the rapid reduction process of the rotary kiln for the laterite nickel ore, the low grade laterite nickel ore serves as raw materials, three manners that fuel is matched in the block masses, the block masses are preheated in a vertical furnace and coal is fed through hot air are developed to guarantee that the laterite nickel ore block masses are contained in the kiln while being hot, high temperature rapid reduction of the whole kiln is achieved, and therefore the rotary kiln temperature is lowered, the reduction time is shortened, and the high-nickel concentrate is effectively manufactured from the low grade laterite nickel ore.

The invention relates to metal reduction equipment, in particular to internally-heating metal reduction equipment for magnesium, calcium and strontium, which solves the problems that the existing reduction equipment is externally-heating structure, the volume of the reduction pot is small, one-time capacity is little, discharging is not continuous, the labor intensity is large, the utilization ratio of the fuel is low, the yield is less and the like. The reduction equipment comprises a furnace body; a charging hopper is arranged above the furnace, a reduction bin is arranged in the furnace body; a vacuum extraction pipe is arranged above the reduction bin; an internally-heating pipe is arranged transversely by the reduction bin; the adjacent heating pipe has a gap for charging and reaction; two ends of the internally-heating pipe are respectively provided with a regenerative chamber; the regenerative chamber is internally filled with heat retainers which are communicated with a combustion-supporting air pipe and is internally inserted with a fuel core pipe which is connected with the fuel; an ignition hole is arranged by the heat retainers; and the middle section of the internally-heating pipe is a combustion chamber. The reduction equipment has simple structure, reasonable design, small construction area of the furnace body, low energy consumption, low production cost and high production efficiency and is applicable to large-scale mechanical production and has large promotion value.

The invention discloses a preparation method of molybdenum dioxide. The preparation method comprises the first step of mixing molybdenum trioxide and molybdenum powder thoroughly and grinding uniformly to obtain mixed powder; the second step of charging the mixed powder into a high temperature resistant boat of a reaction device, then vacuuming, then introducing inert gas to replace the gas in thereaction device and fill the reaction device; the third step of heating the mixed powder in the high temperature resistant boat for reaction, continuously introducing the inert gas and cooling afterthe heating reaction to obtain the molybdenum dioxide. According to the preparation method, the molybdenum trioxide and the molybdenum powder are thoroughly mixed and ground and then placed in the inert gas for reduction reaction to convert the molybdenum trioxide into the molybdenum dioxide, reduction with hydrogen is avoided, the safety of preparation of the molybdenum dioxide is improved, the preparation cost is reduced, the method is simple, the product purity is high, and the method is beneficial to popularization and application.