10results about How to "High economical availability" patented technology

The present invention relates to a method for leaching rare earth in NdFeB waste iron tailings, the method comprising the following steps: (1) drying the NdFeB waste iron tailings to obtain iron tailings material; (2) dry ball milling the iron tailings material obtained in step (1), and obtaining activated iron tailings material after ball material separation; (3) mixing an acid solution having a pH value of 1-3 with the activated iron tailings material obtained in step (2), and performing solid-liquid separation to obtain a rare earth-containing leachate and leach residue. The present invention combines mechanical activation with acid leaching, utilizes mechanical activation to change the chemical stability of the iron tailings, combines the reasonable pH value of the acid solution with the preparation process parameters, ensures a high rare earth element leaching rate under dilute acid excellent dissolution conditions, and the obtained rare earth-containing leachate can directly flow into the extraction and separation process without going through an iron removal process, thereby reducing production costs.

The invention discloses a sintering furnace pressure maintaining and pressurizing pump station system and a pressure maintaining working method. The sintering furnace pressure maintaining and pressurizing pump station system comprises an oil supply assembly, an overflow valve safety valve set, a reversing valve control valve set, an energy accumulator and pressure gauge assembly and an electric cabinet assembly. The overflow valve safety valve set adopts the double-stop electromagnetic valve and the proportional overflow valve, the precision of the proportional overflow valve reaches one thousandth, the pressure maintaining precision of the hydraulic oil cylinder is improved, and work is more reliable; the hydraulic pressure maintaining and boosting system of any one of the three branches can be stopped at any time, pressure relief, cylinder retraction and restart are achieved, the set value is automatically adjusted, and the working states of other branches are not affected. The hydraulic oil tank is provided with the electronic temperature and liquid integrated switch, the liquid level and the temperature of hydraulic oil in the hydraulic oil tank are directly displayed on a self-mounted electronic display screen, the liquid level and the temperature of the hydraulic oil can be output to the PLC in a switching value or analog quantity mode, and higher economic benefits are achieved.

The application discloses a multi-beam laser selective melting and femtosecond composite additive-subtractive optical system, which comprises a femtosecond fiber laser, a continuous fiber laser, a collimating mirror, a beam expander, a galvanometer and a focusing lens, wherein the femtosecond fiber laser, the continuous fiber laser, the beam expander, the galvanometer and the focusing lens are sequentially arranged in a laser transmission direction. The additive optical system and the femtosecond subtractive defect removal optical system are integrated, the structure is compact and simple, and the operation is convenient, and the economic practicability is high.

The invention provides an integrated device for guarding schools in hilly areas. The integrated device comprises a power supply, a main control unit, and a rainfall monitoring system, a mountain torrent water level monitoring system and a crack widening monitoring system which are connected with the input end of the main control unit, the alarm system and the display system are connected with the output end of the main control unit; the rainfall monitoring system transmits rainfall information to the display system through the main control unit, the rainfall information is displayed in real time through the display system, and when a water volume value reaches a threshold value set by the main control unit, the main control unit controls the alarm system to give an alarm; the mountain torrent water level monitoring system transmits water level information to the display system through the main control unit, the water level information is displayed in real time through the display system, and when the water level value reaches a threshold value set by the main control unit, the main control unit controls the alarm system to give an alarm; the crack widening monitoring system transmits crack value information to the display system through the main control unit, the crack value information is displayed in real time through the display system, and when the crack value reaches a threshold value set by the main control unit, the main control unit controls the alarm system to give an alarm.

The invention discloses a novel voltage drop design method for a comprehensive power distribution network, which is characterized in that the total voltage drop allowable value from a voltage source to any equipment terminal point in a system is within 6%, and the method comprises the following steps: step 1, the voltage drop allowable value of a main incoming cable is 1.5%; step 2, a voltage drop allowable value from a module high-voltage main distribution board (2) to a transformer or a high-voltage equipment end is 4.5%; and step 3, the allowable value of the voltage drop from the module transformer (3) to the module load (4) or the lower-level transformer is 6%. According to the novel voltage drop design method for the comprehensive power distribution network, the voltage drop from each stage of power supply loop to the whole power supply loop is effectively controlled through systematic step-by-step and section-by-section division, the model selection cost of cables and power distribution switches is controlled, the design practicability and operability are very high, precise line control is very high, and the system design accuracy and economic practicability are enhanced.

This application relates to an adhesive feeding and screening device, belonging to the technical field of screening equipment. It includes a screening box with a feed inlet at the top and a conical structure at the bottom, and two collection cylinders placed at the bottom of the screening box. A screening plate is hinged inside the screening box. Both collection cylinders are connected to the bottom of the conical structure and communicate with the interior of the screening box. A discharge port is opened along the axis at the bottom end of the conical structure of the screening box. A connecting pipe is connected to the top of collection cylinder one for docking with the discharge port. A discharge annular groove is also formed around the discharge port at the bottom of the screening box. A collection ring frame is fitted onto the connecting pipe, and the bottom end of the collection ring frame communicates with collection cylinder two. A retaining ring is slidably disposed on the connecting pipe between the collection ring frame and the bottom of the screening box to close the discharge annular groove. A stop block assembly for closing the discharge port is slidably disposed inside collection cylinder one. This application improves the structure of the adhesive feeding and screening device, making it easier to collect raw material particles after screening.

The utility model relates to the technical field of brake discs, in particular to a wear-resisting brake disc which comprises a brake disc body and two wear-resisting pieces, wear-resisting grooves are formed in the surfaces of the two sides of the brake disc body, the wear-resisting pieces are matched with the wear-resisting grooves, and a plurality of anti-torque inserting blocks are fixedly connected to the inner ring faces of the wear-resisting pieces in an annular mode at equal intervals. A plurality of limiting grooves are annularly formed in the positions, located on the inner sides of the wear-resisting grooves, of the surfaces of the two sides of the brake disc body at equal intervals, the anti-torque insertion blocks are correspondingly inserted into the limiting grooves in a matched mode, limiting bolts are connected to the anti-torque insertion blocks in a penetrating and threaded mode, and locking screw grooves are formed in the inner surfaces of the limiting grooves. According to the brake disc, the wear-resisting piece can be conveniently and independently replaced, the whole abraded brake disc does not need to be replaced, the later maintenance cost of the brake disc is saved, and the economic and practical performance of the brake disc can be improved.

The invention discloses a precise regulation and control method and system for a separation process of negentropy small molecule water preparation, and relates to the technical field of water treatment. The method comprises the following steps: performing turbidity detection and judgment on purified small molecule water, determining an initial negentropy separation parameter based on historical data, performing separation operation, calculating a negentropy separation deviation value, and generating a corresponding regulation and control signal in combination with a comparison result of a separation negentropy value and a target negentropy value; and feedback strategies such as temperature and pressure parameter adjustment, separation time increase and decrease or separation stop are adopted according to different regulation and control signals. The system comprises a data acquisition module, a turbidity judgment module, a separation execution module, a parameter calculation module, a signal generation module and a precise regulation and control module, and is used for executing the method. According to the method, the technical problems of large negentropy value fluctuation and overhigh energy consumption in the negentropy small molecule water preparation process are solved, the optimal balance between the separation effect and the energy consumption cost is realized, and the technical scheme can be clearly implemented.

The invention provides an application of a lactone additive Revonox 501 in improvement of stability of phosphate fire-resistant oil, the phosphate fire-resistant oil and a method, the addition amount of the lactone additive Revonox 501 is 0.0020%-0.0100%, since the molecular structure of the Revonox 501 is similar to that of the phosphate fire-resistant oil, the affinity of the structure enables the Revonox 501 to be more uniformly dispersed in the fire-resistant oil, and the stability of the phosphate fire-resistant oil is improved. The Revonox 501 is added into the phosphate fire-resistant oil, so that the Revonox 501 more effectively participates in a free radical scavenging mechanism in the fire-resistant oil aging process, the Revonox 501 is rapidly combined with free radicals generated by aging, the Revonox 501 can effectively block the development of free radical chain reaction, the degradation rate of the phosphate fire-resistant oil is fundamentally slowed down, the service life of the phosphate fire-resistant oil is prolonged, and the phosphate fire-resistant oil has a good application prospect. Reliability and safety of operation of the generator set are greatly improved, and a solid guarantee is provided for continuous and stable operation of power production.

The utility model provides a vacuum filtration system and device, the vacuum filtration device comprises: a transmission mechanism, a filter, a material recovery tank and a vacuum system, the filter is arranged right below the transmission mechanism and is connected with the material recovery tank, and the discharge end of the material recovery tank is connected with the vacuum system; the conveying mechanism comprises a conveying belt and a processing assembly. The processing assembly comprises a cleaning mechanism and a drying mechanism. The material recovery tank is arranged in a layered mode and comprises a gas recovery section on the top layer, a liquid recovery section on the middle layer and a particulate matter recovery section on the bottom layer, and the middle layer is provided with a turn-back plate. The liquid recovery section comprises a piston, and the piston moves downwards to a preset position under the adsorption effect of the particulate matter recovery section on the bottom layer. Useful gaseous, liquid and solid materials in filtrate are recycled by the material recycling tank and then enter a vacuum system after being recycled, so that equipment such as a vacuum pump is prevented from being corroded or damaged, the waste of the materials is reduced, and the filtering performance and the economic and practical performance are improved.