42results about How to "Won't bring" patented technology

The invention relates to a preparation method of flower-shaped hollow molybdenum disulfide microspheres, belonging to the technical field of nanometer material preparation. The method provided by the invention comprises the following steps of: (1) solution preparation: dissolving (NH4)2MoO4, CS(NH2)2, NH2OH.HCl and a surfactant into water, dissolving to obtain the solution, and then adjusting the pH value to 5-6.5 by acid; (2) agitating the solution obtained in step (1), and then transferring to a reaction kettle, sealing and reacting at a constant temperature, and then cooling to the room temperature to obtain the reaction product; (3) separating the reaction product, washing and drying to obtain the flower-shaped hollow molybdenum disulfide microspheres. The shape of the flower-shaped hollow molybdenum disulfide microspheres prepared by the method provided by the invention is controllable. The method provided by the invention is simple in process and low in cost; the prepared product is high in purity and high in yield, has an important application in the field of tribology and photochemistry, and is expected to be applied to large-scale industrial production.

The invention provides a gas-phase magnesium purification method based on an elemental silicon filter material. The method uses an elemental silicon filter material to filter magnesium vapor. Within a certain range of temperature and vacuum, elemental silicon does not react with magnesium vapor on the one hand, and will not bring new impurities to the system; on the other hand, Ca, Al, and Mn in elemental silicon and magnesium vapor have special properties. Affinity can form a more stable solid solution with silicon; at the same time, elemental silicon can be used as the nucleation site of impurities in magnesium vapor, lowering the nucleation energy barrier, allowing some impurities to deposit in advance, and removing impurities. The method provided by the invention can be applied to large-scale industrialized gas-phase magnesium purification, and the production efficiency of magnesium purification can be increased by an order of magnitude by increasing the temperature, so that the Mn content of impurities in the magnesium raw material can be reduced to below 4ppm, and the Al content can be reduced to below 10ppm. The Ca content drops below 10ppm, and the purity of the obtained magnesium is above 99.99%.

The invention provides a method for artificial propagation of mytilus coruscus in an intertidal zone of a rocky reef phase. According to the invention, mytilus coruscus juveniles are temporarily conserved at a sea area; the mytilus coruscus larvae are wrapped in net bags prepared with a papyrus material; the net bags with the mytilus coruscus larvae are connected in series, and are placed into the intertidal zones of the rocky reef phase or a dimension stone phase of a natural sea area, such that the artificial propagation of the mytilus coruscus is completed. According to the invention, thick hemp ropes are selected as an attachment base, and thin hemp ropes are wound on the thick manila ropes, such that the base surface area to which mytilus coruscus byssuses are attached is increased. The net bags used for wrapping the mytilus coruscus larvae and the hemp ropes used for attachment of the mytilus coruscus larvae can be rapidly digested under seawater erosion, such that artificial removal is not needed. Therefore, manual labor is effectively reduced, and plastic garbage is not brought to the environment. Mytilus coruscus can first attach to the net bags or the hemp ropes, and with the digestion of the net bags and the hemp ropes, the mytilus coruscus can attach to rocky reef gaps. With the mytilus coruscus secondary attachment manner, mytilus coruscus larvae attachment rate on the rocky reef is greatly improved, and the mytilus coruscus artificial propagation effect is improved.

The invention discloses a method for removing impurities in a furnace during production of oxygen-free copper rods for a bridge bus. The method comprises the following steps: encapsulating impurity removing composition in a copper box or a charcoal box; during feeding, placing the copper box or the charcoal box containing the impurity removing composition together with cathode copper into a melting bin for melting, wherein the weight of the impurity removing composition is 0.3%-1.5% of the total weight of raw materials in the melting bin; and filtering out products of reaction of the impurity removing composition and the impurities in the furnace. The impurity removing composition comprises calcium oxide, natron, praseodymium oxide and cerium oxide, of which the weight part ratio is (5-20) to (8-18) to (1-3) to (1-5). The method for removing the impurities in the furnace during production of the oxygen-free copper rods for the bridge bus has the advantages of simplicity in operation, safety, environmental friendliness and the like.

The invention provides a trenching machine and a control system thereof, and belongs to the technical field of ground surface construction engineering. The trenching machine comprises a control box, an excavating device, a travelling device and a soil storage bucket which is mounted above the control box; a control device, a first power device which provides power for the excavating device and a second power device which provides power for the travelling device are arranged in the control box; according to the trenching device and the control system thereof provided by the invention, the travelling device adopts crawler wheels which are arranged on the two sides of the control box; the overall width of the machine is small, and the crawler wheels grip the ground firmly, so that construction can be performed in an area with small space and a muddy ground surface; a soil discharging channel is formed behind an excavating bucket; the soil which is excavated by the excavating bucket can be discharged into the soil storage bucket through the soil discharging channel; redundant garbage cannot be brought to surrounding environment; the machine is controlled to operate by adopting a remote controller, and is not required to be driven by a driver; labour is saved, and the danger of casualties caused by construction in a dangerous environment is also avoided.