63results about How to "Guaranteed recovery rate" patented technology

The invention discloses a method for simultaneously extracting oil and protein and/or glucoside in moringa seeds. Alkali liquor is added into residues obtained after moringa seed oil is extracted, after ultrasonic treatment and pertinent enzyme treatment are completed, treatment means such as membrane separation and isoelectric precipitation are taken, and crude protein and glucoside crude products are obtained after recovery is completed. According to the method, through organic combination of multiple optimizing treatment means, effective ingredients in the moringa seeds are efficiently extracted, and the oil extraction rate is larger than 90%, the protein and glucoside recovery rate can reach up to 85% or above. The moringa seed oil obtained through the method is high in quality, good in protein functional character and high in glucoside purity, and simultaneous extraction of oil, protein and glucoside in the moringa seeds is creatively achieved.

The invention discloses a preparation method of a low-carbon-emission cold-rolled base material steel strip, and belongs to the field of ferrous metallurgy. The preparation method is a method for producing a low-carbon and low-silicon boron-containing cold-rolled deep-drawing base strip steel coil by adopting process routes of top-bottom combined blown converter smelting, converter tapping slag washing and inclusion removal, slab continuous casting and hot continuous rolling. According to the material prepared through the method, the low-carbon and low-silicon component design is adopted, the LF refining procedure is omitted, and through deoxidation, inclusion removal and continuous casting in the converter tapping process, the recovery rate of boron is guaranteed, and the performance stability of steel is improved. As the LF refining procedure is omitted, the nitrogen content in the steel is reduced, the quality of the strip steel is improved, electrode consumption does not exist in the production process, power consumption and carbon dioxide emission are reduced, and a novel method is provided for converter smelting and slab continuous casting of boron-containing low-carbon and low-silicon cold-rolled base material steel strips.

The invention relates to a method for ensuring the fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top, and effectively solves the problem of ensuring the fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top. The method includes: employing a rectangular tunnel cross-section, conducting tunneling along coal seam roof, and performing bolt-mesh-anchor active support; performing tunneling along the tunnel roof to a mining area boundary, and carrying out bottom digging downward to make the tunnels along the coal seam floor; conducting tunneling along the seam floor to hole through two roadways so as to form open-off cut; laying a caving coal hydraulic support, a conveyor and a coal mining machine on a working surface, arranging two large mining height end hydraulic supports respectively at the ends connecting the working surface and the two side roadways, making the two roadways always in an advanced bottom digging tunneling state, conveying the tunnelled coal to a working surface conveyor by a loading machine, ensuring the tunnels and the bottom plate of the working surface always at one plane triangle coal and leaving no triangle coal. The method provided by the invention has the advantages of simplicity, easy operation and use, low cost and good effect, can effectively guarantee the fully-mechanized top coal caving recovery rate of three-soft thick coal seam roadway tunneling along top, and improves coal production output.

The invention discloses a weak-magnetic-field dry-type magnetic separating device with an involute-arranged permanent magnet system. The weak-magnetic-field dry-type magnetic separating device comprises a body base installed at the upper ends of supports through elastic vibration pieces and vibration motors installed at the bottom of the body base. A top cover is installed above the body base, and a closed cavity is jointly formed by the body base and the top cover; a first feeding hole is formed in the center of the top cover; the closed cavity is divided by a disc support arranged in the cavity into an upper cavity body and a lower cavity body, a partition plate is arranged in the upper cavity body on the disc support, a second feeding hole is formed in the portion, bias arranged on one side of the center, of the partition plate, and a magnetic disc is arranged in the lower cavity body below the disc support, and is composed of a magnetic disc body and a plurality of pieces of permanent magnet steel arranged in an involute mode in the circumferential direction of the magnetic disc body; a discharging opening is formed in the side wall of the upper cavity body on the disc support, and a non-magnetic material baffle and a magnetic material baffle are arranged in the center of the upper plane of the disc support, wherein the tail end of the non-magnetic material baffle and the tail end of the magnetic material baffle extend to the discharging opening. By means of the weak-magnetic-field dry-type magnetic separating device, high-grade recycling of magnetic-mineral ore concentrate is achieved.

The invention discloses a horizontal moderately thick mine body compartment type filling mining method. Manual supporting columns are laid in at least a part of a stoping channel formed between mine layer top plates and mine layer bottom plates. A laying method comprises that at least one layer of steel wire meshes are laid along two sides of a channel bottom plate, barren rocks are filled in the steel wire meshes, and concrete is conveyed to the inner sides of the steel wire meshes to form the manual supporting columns. The horizontal moderately thick mine body compartment type filling mining method can mine all ores under the condition of ensuring security of a mining area, ensures that a recovery ratio reaches more than 90%, and meanwhile adopts byproducts, namely the barren rocks, produced by tunneling when filling is carried out, solves the stacking processing problem of the barren rocks, and enables mining of a thick mine body to be safe and environment-friendly.

A top coal caving hydraulic bracket combined body for exploiting a 4-10 m steeply-inclined coal seam comprises a main frame and a secondary frame, wherein the main frame is used for supporting a top plate and discharging top coal; the secondary frame and the main frame are supporting points for each other to realize left and right movement of the combined body; the main frame consists of a right part and a left part; the right part comprises a right part top beam (1), a right part pedestal (3), a right upright column (5) and a left upright column (6); the left part comprises a left part top beam (2), a left part pedestal (4) and a back end beam (8); the right upright column (5) and the left upright column (6) are used for realizing ascending and descending of the right part top beam (1) and the left part top beam (2); the back end beam (8) is connected with the back end of the left part top beam (2) and is provided with a low-position coal discharging port (801) for discharging top coal falling on the back end beam (8) from the back end of the left part of the main frame. The top coal caving hydraulic bracket combined body for exploiting a 4-10 m steeply-inclined coal seam can realize top coal caving mechanical mining of the 4-10 m steeply-inclined coal seam, effectively improves the coal mining efficiency and the production safety and greatly reduces the labor intensity of workers to a great degree.

The invention provides a method for extracting purified Tth DNA polymerases. The method comprises the following steps: taking engineering bacteria of Tth DNA polymerases for activation, and adding IPTG for inducible expression; adding DTT and tween-20 after the engineering bacteria are treated with lysozyme at room temperature, treating for a period of time on ice and then centrifuging to obtain crude protein; slowing adding silicon dioxide particles in the crude protein, stirring in a magnetic stirring apparatus, centrifuging to remove precipitates; allowing supernatant to flow through an Ni<2+>-chelated Ni-NTA column after the supernatant is supplemented with NaCl, then washing sequentially with washing buffer solutions which have 5 times of bed volume, and at last, eluting the target protein with an eluent, and receiving the eluent containing the target protein; desalting to obtain the purified Tth DNA polymerases; adding glycerol in the obtained purified Tth DNA polymerases, so that the volume fraction is 50%, and saving at -20 DEG C. The method is simple, small in enzyme activity loss, and high in purity and recovery capacity of the recovered protein.

The invention discloses an intelligent monitoring device for ore pulp and foam fullness of a flotation cell, and a monitoring method thereof. The flotation cell is provided with a camera, an electromagnetic flowmeter, a collector, a network switch, a BIM server, an electric control valve and an alarm; the BIM server receives the data, transmitted by the network switch, of the collector, the electric control valve and the alarm, model building software in the BIM server generates a real-time three-dimensional model, and the control system automatically compares the real-time three-dimensional model with a standard model; and if the foam height reaches a safety valve value, the control system of the BIM server sends an activation program instruction to the alarm and the electric actuator ofthe electric control valve through the network switch, an alarm program is activated, and the electric control valve is synchronously started to regulate the ore pulp output caliber. The device and the method have the advantages of high automation degree, ensuring of smooth flotation production, reduction of the safety risk caused when a flotation device runs at a high speed and the tank is full,avoiding of mineral losses, and ensuring of the grade and the recovery rate of flotation concentrate products.

The invention provides a compact vibration harvesting device for fruit harvesting. The device lowers the fruit and branch damage rate and is suitable for harvesting of berries of fruit trees planted in a dwarfing close planting mode; a collecting box is arranged in the front of the bottom of a vertical plate, and a branch supporting device and an insertion tooth vibrating device are arranged abovethe collecting box; the branch supporting device comprises at least two front-back extending chains, and each chain surrounds a front chain wheel and a rear chain wheel; the insertion tooth vibratingdevice comprises a tooth insertion guide rail extending in the front-back direction, an insertion tooth fixing plate in sliding connection with the tooth insertion guide rail and a plurality of upward extending insertion teeth arranged on the insertion tooth fixing plate, and a vibrating mechanism for driving the insertion tooth fixing plate to reciprocate along the insertion tooth guide rail isarranged on the insertion tooth guide rail; the insertion tooth guide rail is in sliding connection with the vertical plate in the vertical direction, and the insertion tooth guide rail is connected with a vertical driving mechanism; the insertion tooth guide rail and the chains are arranged in a spaced mode.

The invention discloses an underground working face mining sequence optimization method for prolonging service time of surface land and belongs to the field of mining technology, land utilization and land reclamation. The method comprises the steps of obtaining an insufficiently mined surface subsidence coefficient fitted curve of a location, determining a subsidence coefficient corrected parameter under a ground critical water accumulation condition, determining underground mining width Dc under the ground critical water accumulation condition, and optimizing an underground working face mining sequence according to the underground mining width Dc. The method optimizes the underground working face mining sequence by analyzing a surface subsidence movement rule of the location under the insufficient mining condition, so that the emergence time of the maximum surface subsidence value is changed, and the service time of the surface land is prolonged relatively. Finally, all underground coal can be mined, so that the coal recovery ratio is ensured, and the service time of the ground land, particularly cultivated land, is considered to a certain extent. The method is a green mining mode taking the land surface into account.

The invention relates to a method for reclaiming ethanol in medicine residue. The method comprises the steps of reclaiming through dry process and reclaiming through wet process; firstly, the reclaiming through the dry process is carried out: a steam valve which leads to an extraction tank is opened; steam is led to the bottom of the medicine residue for water steam distillation and ethanol reclaiming; the distilled ethanol passes through a cooling system and enters a storage tank; after a concentration of the distilled ethanol is equal to or slightly lower than a concentration of the used and extracted ethanol by ten percent, heating is stopped; then, the reclaiming through the wet process is carried out: drinking water or steam condensation water at a temperature of between 50 and 80 DEG C is added from the bottom of the extraction tank till immerging the surface of the medicine residue; the steam valve which leads to a jacket is opened; the residual ethanol is reclaimed by adopting peripheral heating and boiling maintenance under the condition of normal atmosphere or micro-vacuum; and the distilled ethanol passes through the cooling system and enters the storage tank; when the concentration of the distilled ethanol is between 2 and 10 percent, the heating is stopped and the ethanol reclaiming is finished. The method has high reclaiming rate, realizes the repeated use and the maximum reclaiming of the ethanol, changes waste into valuable and quite meets the need of national energy conversation and emission reduction. Compared with the prior reclaiming method, the method reduces the reclaiming time by 3 to 6 hours, thereby reducing the reclaiming cost.

The invention provides a deep well small coal pillar gob-side entry retaining method based on roof lower key layer roof-breaking pressure relief, and relates to the technical field of coal mining. Ventilation and support in deep well gob-side entry retaining are improved. The deep well small coal pillar gob-side entry retaining method comprises the steps that roof geological conditions are determined, blasting parameters are determined according to the roof geological conditions, the roof-breaking pressure relief effects of lower key layers with different thicknesses are numerically simulated,and roof-breaking parameters of a roadway are determined; then excavating blast is conducted in the test roadway, and a displacement monitoring station, an anchor rod and an anchor cable stress monitoring station are arranged on surrounding rock in the roadway; and the supporting parameters are corrected, excavating blast is conducted in the gob-side entry retaining roadway, and supporting is conducted according to the corrected supporting parameters. According to the method, blasting is conducted on the side, deviating from solid coal, of a coal seam roof, stress transmission of the key layer is cut off at the lower key layer of the pre-split coal seam roof, thus high stress acting on small coal pillars and gob-side entry retaining is transferred, therefore the roadway environment is improved, and roadway maintenance is facilitated.