290results about How to "Simple on-site operation" patented technology

The invention discloses a device for monitoring a coal bed gas parameter in real time. The device is composed of a hole packer, a gas parameter sensor, a data collection instrument and a booster pump, wherein the hole packer is composed of a supporting steel pipe, a hole sealing capsule, a front cover, a pressurized pipe, a gas pipe and a propelling movement rod; the gas parameter sensor mainly comprises a gas pressure sensor, a flow sensor and a gas temperature sensor; the data collection instrument mainly comprises an A / D conversion circuit and a CPU (central processing unit) processor; and the CPU processor is respectively connected with a program memory, a display, an operation keyboard, an RS232 communication circuit, a data memory and a standard signal output interface. A pressurized pump pressurizes the hole sealing capsule to cause the hole sealing capsule to expand and seal holes. The gas parameter sensor senses each parameter of the gas, the data collection instrument collects corresponding data, and the gas parameter of the coal bed can be quickly and accurately monitored in real time. The device has a method and is easy to operate in field, the basic parameters of the coal bed gas can be accurately measured, and the dynamic variation of the coal bed gas parameters can be monitored in real time.

The invention discloses a continuous pipeline tripping device, comprising a rotating drum retracting, laying and releasing system, a guided injection system, a traction system, and a hydraulic power system used for supplying power for the above systems. The rotating drum retracting, laying and releasing system comprises a rotating drum, a cable laying device and a guide rail, wherein the guide rail is fixed on an underpan of a vehicle system, the rotating drum is in a sliding connection with the guide rail through a rotating drum supporting seat, the cable laying device is fixed on one side of the rotating drum, the rotating drum is driven to move along the guide rail by the cable laying device, thereby realizing the arrangement of an oil pipeline on the rotating drum. The traction system comprises a double-arm crane and a flat track frictional transmission device. When the rotating drum rotates, the oil pipeline on the rotating drum passes through the flat track frictional transmission device and a guided injection head in sequence to enter into an oil well. According to the invention, a fast connection with the mouth of the well is guaranteed, the operational process of site construction is simplified, the damage of pipelines is prevented, and the success rate of construction is increased.

The invention discloses a current calibrating method and device of a PMSM. The method comprises that an inflection-point rotating speed at which the PMSM enters a weak magnetic area form a non-weak magnetic area and a zero-torque-point demagnetizing current in the weak magnetic area are obtained according to a voltage equation and a set voltage utilization rate of the PMSM; a working area where the PMSM is positioned at present is determined according to the relation of the present rotating speed and the inflection-point rotating speed of the PMSM; when the PMSM is positioned in the non-weak magnetic area, the current of the PMSM in the non-weak magnetic area is calibrated automatically according to a preset maximal torque-current ratio curve; and when the PMSM is positioned in the weak magnetic area, the current of the PMSM in the weak magnetic area is calibrated according to the set voltage utilization rate and the zero-torque-point demagnetizing current in the weak magnetic area. Thus, the calibration time can be shortened substantially, the calibration efficiency is improved, and it is ensured that calibration data is consistent and reliable.

The invention discloses a heat-resisting interpenetrating polymer network plural gel profile control agent. The heat-resisting interpenetrating polymer network plural gel profile control agent is characterized by being composed of the following components including (a) sodium silicate, (b) cross-linking agent which is a hydrolysable ester compound, (c) cross-linking agent which is selected from compounds of phenolic resin cross-linking agent, chromium lactic, aluminum citrate or zirconium citrate, (d) polymers which are selected from hydrolytic polyacrylamide, xanthan gum or cellulose, (e) additive I which is selected from sodium bentonite, calcium bentonite or nano silica, (f) additive II which is selected from diatomite or silicate, and (g) water. The invention also provides a preparation method of the heat-resisting interpenetrating polymer network plural gel profile control agent.

The invention discloses a convenient apparatus for sampling water bodies having different depths from underground / surface water, and a method thereof. The apparatus comprises a telescopic connecting rod, and the bottom of the telescopic connecting rod is provided with a plurality of detachable sampling bottles; a reel is arranged at the fixed end at the top of the telescopic connecting rod, and a wheel skidding fixed device is arranged at the extension end at the bottom of the telescopic connecting rod; a plurality of rails are respectively arranged on the reel and the wheel skidding fixed device, a lifting rope is wound on every rail, and the quantity of the lifting ropes is same to that of the sampling bottles; and the top of every sampling bottle is provided with a sampling bottle cap and a check valve device, and the bottom of the lifting ropes are respectively connected with the check valves. The sampling apparatus is placed in the water, the lifting ropes corresponding to the sampling bottles are respectively stretched, and the corresponding check valve devices are opened to collect the water bodies. The apparatus and the method have the advantages of manpower saving, great reduction of the interference of disturbance of the water bodies, caused by repeated water collection in the sampling process, to the components of the water bodies, and provision of a strong technical foundation for the water environment investigation work.

The invention relates to a water-soluble neutralizing agent mainly for oil-extraction plant low-temperature light oil position metallic conservation, which is prepared form naphthenic acid, polyenamine and organic acid anhydrides or ethylene oxide as raw material through mixing with neutralization agent and dissolvent.

The invention relates to a strengthening part for a highway engineering side ditch, a jet stream trough, a water-power engineering cable trench and a building engineering beam template and a construction technical method thereof, and particularly relates to a combined type channel steel support template rod system and a construction method thereof. The combined type channel steel support template rod system is characterized by comprising an upper cross beam, vertical columns and inclined support rods, wherein the upper cross beam and the two vertical columns are connected through fastening pieces to form a template fixing groove; and one ends of the inclined support rods positioned on two sides of the template fixing groove are connected with the upper cross beam through the fastening pieces, the other ends of the inclined support rods are connected with the vertical columns, and the lengths of the inclined support rods are adjustable. The strengthening part disclosed by the invention is simple in structure and easy to operate in the field, can be adjusted according to different sizes of construction structures, is saved in material by being recyclable and free of influencing the beauty of the structures, can be used for improving the construction efficiency and quality, meets the requirements for demand of environmental friendliness and green construction and is wide in practicability.

The present invention discloses water treating agent containing methoxy naphthalene as fluorescent marker. The water treating agent is prepared through the first reaction of 4-chloro-1, 8-naphthalic anhydride, glacial acetic acid and 3-dimethylamino propylamine to obtain 4-chloro-N-3-dimethylamino propyl-naphthyl imide; the subsequent reaction with sodium methoxide to introduce methoxy group and obtain 4, 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide, which is reacted with allyl chloride to obtain quaternary ammonium salt of 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide allyl chloride as fluorescent monomer with fluorescent characteristic and double bond; and the final polymerization with phosphorus containing compound, acrylic acid and other monomer to obtain the multifunctional water treating agent with corrosion retarding, scale inhibiting, dispersing and fluorescent tracing functions.

The present invention discloses a fluorescence labeled acroleic acid-sodium allylsulfonate copolymer and a method for preparing the same. The method comprises the following steps: 4-bromine-1,8-naphthalic anhydride, methylamine, N-methyl diethylenediamine, and the like are used as material and is subject to amidation reaction, amination reaction, and quaternization reaction to be synthesized, and a novel fluorescence monomer 4-(N'-methyl-1-diethylenediamine)-N-methyl-1,8-naphthalimide allyl chloride quaternary ammonium salt is obtained by synthesis; and then the fluorescence monomer is copolymerized with sodium hypophosphite, acroleic acid and sodium allylsulfonate to obtain the FC-AA-SAS product. The raw materials for synthesizing the fluorescence monomer and the polymer are easy to obtain and the reaction conditions are mild. When the product is used in circulating water, the thickness of a medicament in a circulating water system can be accurately, duly and quickly measured through the variation of the fluorescence intensity, and the on-line medicine addition and the quantitative control are realized. Therefore, the on-site operation is largely simplified, and the management level is improved. The functional groups, such as sulfonic group, phosphino group and the like, are introduced into molecules, and thus the polymer has a plurality of functions, such as fluorescent tracing, anti-precipitation, disgregation and the like.

A phosphino-based mapropyl copolymer containing fluorescent group and its production are disclosed. The process is carried out by taking 4-bromine-1,8-naphthalic anhydride, glacial acetic acid and N, N-dimethyl-ethylenediamine as raw materials to obtain 4-bromine-N-(2-N,, N,-dimethylbenzidine-ethyl)naphthalimide, reacting it with sodium methoxide to induce methoxy-group to obtain 4-methoxy-N-(2-N,, N,- dimethylbenzidine-ethyl)naphthalimide, reacting it with allyl chloride to obtain fluorescent monomer 4-methoxy-N-(2-N,, N,- dimethylbenzidine-ethyl)naphthalimide allyl ammonia chloride with fluorescent characteristic and double-bond, polymerizing it with sub-sodium phosphate, maleic anhydride, acroleic acid and propenyl-sodium sulfate to obtain the final product. It has fluorescent tracting, corrosion-inhibting, scale-inhibiting and dispersion functions.

The invention discloses a drain-type pipe piece for tunnel lining. The drain-type pipe piece comprises a reinforced concrete pipe piece (1), a slurry injection hole (or a hoist hole) (1a) in the pipe piece (1), a load bearing steel bar (1b), and a concrete protective layer (1c) on the outer side; a water stop rubber block (2) capable of being expanded when being in contact with water is preburied in the concrete protective layer (1c) right opposite to one or two slurry injection holes (1a) of the pipe piece (1); a self-advancing type hollow anchor rod (3) is inserted in the slurry injection holes (or the hoist hole) (1a) of the pipe piece (1), then penetrates the water stop rubber block (2), and shoots out of the concrete protective layer (1c); and drain holes (3a) are formed in the rod wall of the outer end of the self-advancing type hollow anchor rod (3), and a filter column (4) used for filtering sand is plugged in the inner cavity of the self-advancing type hollow anchor rod (3). Lining built with the pipe pieces has a reliable drain function, and can reduce water pressure around the structure to ensure tunnel safety; and construction is convenient, small damage is caused to the pipe piece lining structure, and construction cost of the pipe piece lining is low.

The invention mainly aims to provide an in-situ remediation method aiming at dispersible petroleum-contaminated soil, which is used for remediating dispersible non-uniformly petroleum-contaminated soil. By means of adjusting the operation technical parameters such as adding amount and adding frequency of an agent and changing the technical parameters according to different positions and different contamination degrees, in-situ remediation is performed on petroleum contamination at an oil well site. A movable integral agent adding device is adopted and is internally provided with an H2O2 and catalyst iron solution tank. H2O2 is sprinkled by using a spray head; and the H2O2 utilization efficiency is higher in a low-dosage multiple H2O2 adding mode, so that the remediation of the dispersible petroleum-contaminated soil is realized. The in-situ remediation method has the advantages of simple treatment process, flexible operation mode, high H2O2 utilization rate, low process and engineering operation cost, high treatment efficiency, contribution to subsequent biological remediation process and obvious economic benefit and environmental benefit.

The invention discloses a device for calibrating the lineup of a dragging linear array. The hardware of the device mainly comprises a calibration sound source, a receiving hydrophone array, a signal acquisition transmission module array and a data processing module. The lineup calibration process mainly comprises the following steps: (1) calibrating a sound source to transmit a calibrated submarine sound signal in a system synchronous clock; (2) according to the system synchronous clock, enabling the signal acquisition transmission module array to start work while the sound signal is transmitted, that is, a timer starts timing and hydrophones acquires data; (3) recording the timing time of the timer while the signal acquisition transmission module array acquires the transmitted calibrated submarine sound signal, and transmitting the timing time to the data processing module; (4) estimating the distances between the hydrophones and the calibrated sound source according to the timing time; (5) estimating the coordinates of hydrophones through the data processing unit according to the estimation results in combination with depth sensor data, thereby realizing lineup calibration. By adopting the device and the method, position calibration of array elements of a dragging array can be conveniently achieved.

The invention discloses a magnetic ore dressing method of high-quality feldspar ore. The ore dressing method comprises the following steps of: crushing and grinding raw ore; performing weak magnetic separation; performing magnetic separation twice by using a high-gradient strong magnetic separator; screening; dehydrating; and filtering. The method breaks through the conventional method, a common strong magnetic separator and an acid leaching process are replaced by separating twice with a SLon high-gradient strong magnetic separator, the fineness of the ground ore is doubled and improved from 0.1mm to 0.2mm, the ore grinding cost is greatly reduced, and the pelitization degree is reduced, thereby playing a key role in simple dehydration of subsequent products so as to solve a series problems of serious product pelitization, serious environment and equipment pollution, small production scale, high cost, serious resource waste, instable product quality and the like in the conventional process. The method also has the advantages of simple production flow, environment friendliness, low production cost, is easy to operate and construct on the spot and is suitable for large-scale production.

The invention discloses a method for treating landslide of a tunneling working face with pipe penetration combined lagging jacks. The method comprises the steps that lantern ring lagging jacks (2) are installed in a safe area (1) of a tunnel one by one, wherein a certain number of lantern rings (3) are welded to the outer sides of the lantern ring lagging jacks (2); a steel pipe (4) penetrates through the lantern rings (3) of the lantern ring lagging jacks (2) in sequence and finally extends to the working face (5); sectional support lagging jacks (7) are installed on the portion, in a landslide area (6), of the steel pipe (4), wherein the adjacent lagging jacks are connected through horizontal pull rods (8), and a metal net (9) is laid above each sectional support lagging jack (7); a concrete pumping pipe (10) and an exhaust pipe (11) are reserved at the deepest landslide position. The invention discloses the specific method for combining and using the pipe penetration combined lagging jacks during treatment of landslide of the tunneling working face. The method effectively solves the problems of existing tunnel landslide treating methods that period is too long, the number of procedures is large, cost is high, and risk is high.

The invention relates to a method for throwing and fishing out an underground restrictor from a gas well without utilizing steel wires, which is applied to gas production in the gas well. The method comprises the following steps: before throwing, placing an underground restrictor working barrel into a position of projected depth in the gas well; then installing a throwing and fishing catcher and an underground restrictor core, throwing the underground restrictor core, enabling the underground restrictor core to enter into the underground restrictor working barrel and be automatically locked and finishing throwing the underground restrictor core; and in the process of fishing, installing the throwing and fishing catcher and a fisher and fishing out the underground restrictor core. The lifting force of natural gas flow is utilized to lift the fisher and the underground restrictor core to the ground together. The invention has the effects that the on-site operation of the underground restrictor can be more convenient under the premise of not reducing the use effect of the underground restrictor; and compared with the process of throwing and fishing out the underground restrictor by utilizing a well testing truck, the method of the invention has the advantages of simple throwing and fishing process and simple and convenient on-site operation, not only can accurately and reliably throw the underground restrictor but also save throwing and fishing time and reduce throwing and fishing expenses.

The invention discloses a preparation method of a high-temperature-resistant reversible emulsifier and an application thereof in drilling fluid. The technical scheme is as follows: the preparation method comprises the following steps: adding a mixture including 8 parts of dodecanamine, 72 parts of hexadecylamine and 180 parts of octadecylamine into a spray type reaction kettle; displacing the air in the kettle by using nitrogen to remove all the air; then heating to 100 DEG C while vacuumizing; sucking out materials from the inside of the reaction kettle and spaying the materials into the reaction kettle; adding 90 parts of ethylene oxide into the kettle while spraying for reacting for 4 hours; then preserving the heat for 1 hour, cooling to 70 DEG C and discharging; pouring obtained reactants into a stirring type reaction vessel; and keeping the temperature at 70 DEG C, adding 100 parts of white oil, further stirring for 0.5h; and adding 50 parts of a polyol type surfactant and 50 parts of a polyethylene glycol type surfactant, further stirring, and discharging after cooling to obtain the high-temperature-resistant reversible emulsifier. The high-temperature-resistant reversible emulsifier has the beneficial effects of good stability, strong inhibitive capability and easy maintenance.

The invention discloses a pre-reinforcement method and a pre-reinforcement structure for a full section of a tunnel. The method comprises the following steps: S1, arranging a plurality of conduits (1) in the surrounding rock of a to-be-excavated tunnel and along the contour line of a tunnel face (4), and grouting to the surrounding rock of the to-be-excavated tunnel through the conduits (1); S2, arranging a plurality of free-cutting anchor rods (2) in the to-be-excavated tunnel from the tunnel face (4); S3, excavating the tunnel face (4). The pre-reinforcement method and the pre-reinforcement structure disclosed by the invention are easy in field operation, reasonable in reinforcement cost, high in safety and good in reinforcement effect, and the problem that the working face of the tunnel collapses due to excessive extrusion deformation during a loess tunnel excavation and support process of full section excavation to influence the primary support stability is solved very well; as mechanized construction is not influenced by the free-cutting anchor rods during the construction process, so that the construction speed is quickened very well, the reasonable construction cost is kept, the construction safety, the construction quality, the construction period and the like are ensured, and the tunnel construction level is improved; the pre-reinforcement method and the pre-reinforcement structure have very good site construction value.

The invention discloses an oil base drilling fluid parameter design method. The oil base drilling fluid parameter design method sequentially includes the following steps: physical properties and structure properties of stratum rock are tested though tests; according to the physical properties and the structure properties of the stratum rock, pore structures of typical mineral and the stratum rock are built, a combined characterization model of oil base drilling fluid parameters to wettability of the stratum rock and an oil base drilling fluid system is built, and a relational graph between the oil base drilling fluid parameters and the wettability is drawn; a well wall stable fixed mechanics model of the stratum rock and the oil base drilling fluid system under the wettability condition is built, and a relational graph between the oil base drilling fluid parameters and the well wall stability is drawn; according to the relational graph between the oil base drilling fluid parameters and the well wall stability, the oil base drilling fluid parameters are determined. According to the oil base drilling fluid parameter design method, a window of the designed oil base drilling fluid parameters is accurate and reachable, the effect of the oil base drilling fluid on keeping the well wall stability can be evaluated in a quantitative mode, underground complex conditions are prevented, and the cost of the oil base drilling fluid is reasonably controlled.

The invention relates to a cannon pitching radius measuring method, and belongs to the technical field of measurement. An indirect measuring method is employed, and the cannon pitching radius measuring method relates to measurement of cannon size data and parameters needed for calculating the deviation angle that the gun bore line deviates the shooting plane. The artillery pitching radius measuring method comprises specific operations that a cannon to be tested travels into an assigned detection area; a cross curve is accurately pasted on the end face of the gun muzzle; a theodolite is erected right ahead the cannon; a steering gear box of the cannon is rotated until one side surface of the gun barrel can be observed in the theodolite; a total station is erected at one side, of the gun barrel, having marks; the pitching angle is in a range from 15 DEG to 20 DEG; and the pitching radius is obtained according to the measuring result. The cannon pitching radius measuring method provides parameters for cannon size data and deviation angle calculation. The measurement precision of the cannon pitching radius measuring method satisfies the usage requirement, and the cannon pitching radius measuring method can be operated conveniently.

The invention discloses an initiation controller of an electronic detonator and a control method thereof. According to the initiation controller, a photoelectric coupler is used in a communication unit, so that electric signals are isolated, and the safety and reliability of communication are increased; the PC (Personal Computer) communication unit is used, so that two-way communication between the initiation controller and a PC is realized, and the blasting sequence is designed in advance by virtue of the PC, so that automatic setting is realized, thereby simplifying spot operation; a communication module of the electronic detonator is used, so that two-way communication between the initiation controller and the electronic detonator is realized, and accurate management and control of the initiation controller over the electronic detonator in an initiation process are guaranteed; an authorizing device and a locking device are used in a human-computer interaction unit for double insurance, so that the safety of the initiation controller is greatly increased; positioning information is obtained by a positioning unit on the basis of a Beidou positioning chip, so that the electronic detonator is accurately positioned, thereby guaranteeing an automatic setting function that the delay time is intelligently distributed according to position information of the electronic detonator.

The invention provides a supporting structure for fabricated structure beam plate connection and a mounting method and belongs to the technical field of building structures. The supporting structure is a frame structure formed by connecting two symmetrical supporting frames through a supporting plate, the cross section of each supporting frame is of a triangular frame structure, the right-angle side edges of the supporting frames correspond to superposed beams and a superposed plate correspondingly, bolt connecting holes are formed in the right-angle edges opposite to the superposed beam sides, and the right-angle edges opposite to the superposed beam sides are connected to pre-buried nuts arranged on the superposed beam side through bolts; and adjusting frames are connected to the right-angle edges opposite to the superposed plate, in use, the supporting plate is connected into the adjusting frames on the supporting frames in the two adjacent superposed beams, the superposed plate is placed above the supporting plate and connected to the two superposed beams, and the height of the supporting plate is adjusted through adjusting bolts connected between the adjusting frames and the supporting frames. According to the supporting structure for fabricated structure beam plate connection and the mounting method, vertical supporting of the lower portion of a floor slab is canceled, so that form erecting difficulty is lowered, cost is saved, and construction accuracy can be met; and on-site operation is easy, and the problems of difficult construction during beam plate lap joint as well as reinforcing, supporting and dismounting of post-poured node formworks can be effectively solved.

The invention provides an identification and separation device for waste plastics. The device comprises a crushing plant, a friction assembly, an accelerating unit, a constant magnetic field unit, a comparing unit, and a collecting unit. A variety of standard pure plastics or waste plastics are crushed by the crushing plant and then are charged by the friction assembly, the charged plastics enter into the accelerating unit for acceleration and then enter into a constant magnetic field at a same speed with an included angle formed by the track of the plastics and the direction of the magnetic field being greater than zero, thereby forming different movement tracks, the comparing unit compares the movement tracks of waste plastic particles with the movement tracks of a variety of standard pure plastic particles so as to determine that a waste plastic and a standard pure plastic which has a same movement track as the waste plastic does are of a same kind, and the collecting unit collects waste plastic particles which have similar movement tracks in the magnetic field. The invention also provides an identification and separation method for waste plastics. According to the invention, the disadvantages that an optical method for identification of waste plastics is work-environment-demanding and expensive can be overcome, and the purposes of easy operation and low cost in identification and separation of waste plastics of automobiles are achieved.

The invention relates to a method for reinforcement repair of a metal pipeline with the defect, which is particularly suitable for on-site operations under the condition of continuous transmission of the pipeline. The method is characterized in that: after the surface of a pipe body is treated by using sand blast (recommended) or an electric angle grinder, the defect 2 is filled and leveled up by hot spraying metal alloy, and the surface of the integral circle of the pipe body 1 is sprayed to form a metal alloy basement layer 3, wherein the metal alloy basement layer has the excellent compression strength; a fiber resin composite 4 formed by fibers and an epoxy bonder is wound on the basement layer, the cured fiber resin composite has the high tensile strength and elastic modulus, so the fiber resin composite limits the radial dilatational strain at the defect, and reduces the stretching stress and stretching strain at the defect through the metal alloy basement layer to realize the reinforcement repair on the defect of the pipeline.

The invention relates to a compound peroxycarboxylic acid disinfection solution. The compound peroxycarboxylic acid disinfection solution comprises the following components in percentage by mass: 15-20% of hydrogen peroxide, 30-40% of glacial acetic acid, 1-5% of octanoic acid, 2-10% of surfactants, 1-3% of stabilizers and 50-82% of pure water, wherein the surfactants comprise octyl sodium sulfonate and ampholytic surfactants. The invention also provides a method for preparing the compound peroxycarboxylic acid disinfection solution. The compound peroxycarboxylic acid disinfection solution is clear, transparent, safe and reliable, and is high in stability, excellent in disinfection effect, low in corrosion to equipment, free of residues, free of toxins, simple in process and convenient to operate; the industrial production of the compound peroxycarboxylic acid disinfection solution is easy to implement.

The invention provides a channel section steel production system and a production method thereof. The channel section steel production system comprises a feeding device, a heating device, a hot-rolling unit, a roll-bending unit and a fixed-length cutting device which are sequentially arranged. Flat steel blank raw materials are selected, heated through an electric induction heating device and then are fed into rolling mills of two machine frames to be subjected to rolling deformation, a first pass is used for thickness decrease, a second pass is used for plate shape forming of cross sections of rolled pieces before hot bending, and the two machine frames conducts deformation rolling on the raw materials simultaneously in a continuous-rolling state. By the adoption of simplified two-pass hot rolling, the thickness and plate shapes all cross section of flattened and spread channel section steel are rolled, waste heat is utilized to conduct hot bending forming on the continuous roll-bending unit, and fixed-length sawing, cooling and finishing are performed to obtain channel section steel products. The production method is simplified, hole type rolling pass is simplified, production difficulty is reduced, and the production success rate and finished material rate are improved. The number of the rolling mills is decreased, a production line is shortened, short-process production is achieved, and investment and follow-up maintenance cost are reduced.

The invention relates to a dressing method for high-phosphor-content oolitic hematite. The dressing method has the technical scheme that the method comprises the following steps that 1, high-phosphor-content oolitic hematite ore with the crushing granularity smaller than 20mm to 30mm is fed into an ore grinding machine, and the high-phosphor-content oolitic hematite is subjected to continuous two-section ore milling until the ore with the ore fineness smaller than 0.074 accounts for about more than 90 weight percent; 2, the milled ore pulp passes through a pulp removing hopper for removing sludge smaller than 0.020m, and the removed sludge is directly subjected to tail-escaping; 3, the ore pulp subjected to the sludge removal is subjected to twice continuous wet type strong magnetic sorting, tailings in the first strong magnetic sorting and tailings in the second strong magnetic sorting are directly discharged into a tailing storage pool; 4, the hematite ore pulp subjected to the strong magnetic sorting is subjected to re-sorting by a table concentrator to obtain coarse particle hematite concentrate; 5, the re-sorted table concentrator middlings and tailings after the coarse particle hematite concentrate sorting are mixed, then, a one-coarse one-sweep and three-concentration floatation process is adopted, fine particle hematite concentrate is obtained, the two parts of hematite concentrate including the coarse hematite concentrate and the fine hematite concentrate are mixed, dephosphorizing agents are added for stirring treatment, and the final oolitic hematite concentrate is obtained. The method has the characteristics that the process flow is simple, the in-site operation is simple, the cost is low, the grade of the oolitic hematite concentrate is high, and the recovery rate is high. The TFe grade of the obtained oolitic hematite concentrate is higher than 58 weight percent, P is less than 0.12 weight percent, and the recovery rate is higher than 70 weight percent.

The present invention discloses a nitride red light conversion film, which is characterized by comprising, by weight, 0.1-2.0% of a nitride red light conversion agent, 0.1-5.0% of a third auxiliary agent, and the balance of film substrate, wherein the composition general formula of the nitride red light conversion agent is A1-x-yBCN3:REx,Tny. According to the present invention, the nitride red light conversion agent is incorporated into the film, especially the agricultural film, such that the film has a light conversion effect, and the light conversion agent application is convenient; and the nitride red light conversion film and the plant photosynthesis spectrum have good matching property, and the nitride red light conversion film can absorb 260-620 nm wavelength light harmful for plants, and emits 600-780 nm wavelength red light required by plant photosynthesis.

The invention discloses a method for testing initial position angle of a motor rotor and solves the technical problem that the prior art is high in requirements on initial position angle testing conditions of the motor rotor and difficult in actual operation. The method includes following steps: step 1, applying a current i on a to-be-tested motor to enable the same to run; step 2, after the motor runs, enabling the current i to be zero; step 3, measuring voltage ud and uq of a shaft d and a shaft q of a motor stator; step 4, calculating according to a triangular function relation between ud and uq to acquire initial position angle deviation theta err of the motor rotor. The initial position angle deviation of the motor rotor is calculated by directly using the voltage of the d shaft and the q shaft of the motor stator, and corresponding relation between voltage at the motor end in a motor controller and the initial rotor position angle is made clear; the method is simple and suitable for engineering site operation; online fault diagnosis and error correction control can be realized, and system function safety can be improved.

The invention discloses a novel plugging material, comprising the following components in percentage by weight: 0.1-0.4 parts of fiber, 0.5-2.5 parts of shell, 2-4 parts of saw dust, 3-6 parts of rubber powder, 1-5 parts of mica, and 1-5 parts of roseite. The plugging material has the advantages that the plugging effect is obvious, the plugging material is made without other complex process; the cement slurry with the plugging material is good in liquidity and easy to confect in the field without other rigorous requirements to ground construction apparatus; the cement strength is developed fast and is proper, so as to avoid new borehole in drilling and plugging processes, thus completely satisfying the field needs.