37results about How to "Avoid wrapping" patented technology

The utility model discloses a pontoon type acoustic Doppler flow velocity profiler, which relates to the field of acoustic Doppler flow velocity profilers, and comprises a pontoon main body and an acoustic Doppler flow velocity profiler main body, and two electric push rods are arranged on the acoustic Doppler flow velocity profiler main body. Movable rings are installed at the output ends of the two electric push rods through piston rods, a plurality of connecting blocks are arranged on the outer wall of the acoustic Doppler flow velocity profiler body, stop levers are connected to the connecting blocks through rotating shafts, and push plates are connected between the stop levers and the movable rings through connecting shafts. According to the acoustic Doppler flow velocity profiler, the blocking rod and the protruding block are arranged, the blocking rod can protect the acoustic Doppler flow velocity profiler body and prevent objects from impacting the acoustic Doppler flow velocity profiler body, the protruding block is arranged so that the plastic bag can be conveniently hung, and the plastic bag in water is prevented from being wrapped on the outer wall of the acoustic Doppler flow velocity profiler body; therefore, the acoustic Doppler flow velocity profiler main body is prevented from detecting the water body.

The invention relates to a preparation method of a lightweight reduced graphene oxide-silicon dioxide electromagnetic wave absorbing material. The invention belongs to the technical field of electromagnetic wave absorbing materials. The invention solves the problems that the impedance of the existing reduced graphene oxide is mismatched, the density of the modified reduced graphene oxide composite wave-absorbing material is increased and the preparation method is complicated. The method comprises the following steps: performing chemical crosslinking on graphene oxide, silicon dioxide and a silane coupling agent to obtain a precursor; and drying and sintering the precursor. The material prepared in the invention has good impedance matching and abundant interface polarization and relaxation effects, can effectively reduce the reflection loss value of electromagnetic waves and increase the effective absorption bandwidth of the electromagnetic waves, and has excellent electromagnetic wave absorption performance. When the thickness of the material is only 1.5 mm, the RL of the material can reach-54.08 dB, and when the thickness of the material is 1.7 mm, the effective absorption bandwidth of the material can reach 5.12 GHz. In addition, the density of the material is only 0.083 g / cm < 3 >, the process is simple, and stable batch production can be realized.

The invention relates to an elution phase, an oil gel bead preparation and a preparation method of the oil gel bead preparation, the surface of the oil gel bead preparation does not wrap a wall material, and the oil gel bead preparation is prepared from 50-80 parts by weight of isononyl isononanoate, 10-20 parts by weight of trimethylsiloxyphenyl polydimethylsiloxane, 0-20 parts by weight of stearyl alcohol and / or 0-15 parts by weight of behenyl alcohol, 1-10 parts by weight of dextrin palmitate and 0-10 parts by weight of rosa palmifolia fruit oil according to 100 parts by weight. The obtained oil gel bead preparation is good in forming effect and more uniform in surface and size distribution, so that the oil gel bead preparation is more attractive, the oil gel bead preparation is melted once being smeared, and the phenomenon of mud rubbing is avoided. Besides, the oil gel bead preparation can be used for embedding fat-soluble active matters, the components are simpler, and the particle size of the oil gel bead preparation can be controlled, so that the oil gel bead preparations with different particle sizes can be obtained and can be applied to different types of cosmetics.

The invention discloses a method for promoting scandium element recovery, which comprises the following steps of: adding iron salt into a scandium-containing aluminum solution to obtain an aqueous phase solution, extracting by using an organic phase, separating liquid to obtain an Sc-Fe-organic phase, adding liquid caustic soda to carry out reverse extraction scandium precipitation, separating liquid again to obtain high-scandium slag and a liquid caustic soda water phase, dissolving out the high-scandium slag and the liquid caustic soda water phase, and recycling the scandium element. And sequentially filtering, diluting and separating to obtain high-purity Sc (OH) 3 and lower-concentration caustic soda liquid. According to the method, the co-precipitation characteristic of Sc (OH) 3 and Fe (OH) 3 is utilized, so that the scandium element is efficiently separated from the iron saponification oil residue in the liquid alkali environment, the production difficulty is remarkably reduced, the high purity of the scandium product is ensured, no newly added impurity is added in the whole process, and efficient and clean recovery of the scandium element is realized.

The magnetic separation device comprises a bottom plate and a magnetic separation box arranged above the bottom plate, a primary screening assembly is arranged in the magnetic separation box, so that quartz powder entering the magnetic separation box firstly falls onto a screening plate, and a vibration motor drives the screening plate to vibrate up and down; large-particle scrap iron or impurities in the quartz powder are separated, small scrap iron and the quartz powder fall down to be filtered again, the workload of magnetic separation in the later period is reduced through the primary screening assembly, and the magnetic separation efficiency is improved; the quartz powder subjected to primary impurity removal falls onto a magnetic rod, a driving motor is started, the driving motor drives the magnetic rod to rotate, and then scrap iron in the quartz powder is adsorbed and removed; and the quartz powder filtered twice falls onto a conical discharging block at the bottom of the magnetic separation box, and iron chips in the quartz powder are adsorbed again by a magnetic block in the downward sliding process, so that a relatively good iron removal effect is achieved, and the working efficiency is improved.

This invention relates to the field of wastewater treatment, specifically a wastewater treatment device, including an electrolytic cell with an electrolysis assembly installed on it; it also includes a centrifugal sedimentation mechanism and a reciprocating stirring mechanism, which cooperate with each other; the centrifugal sedimentation mechanism includes a centrifuge cylinder with a turbine installed on it, and a rotation drive assembly installed on the bottom outer wall of the electrolytic cell; the reciprocating stirring mechanism includes a connecting frame with several rotating tubes connected to it, the bottom of which is connected to a stirring rod via a mounting base; a drive gear placed on the rotating tubes; and a rack and pinion reciprocating frame meshing with the drive gear. This invention utilizes the centrifugal sedimentation mechanism and the reciprocating stirring mechanism to achieve rapid sedimentation of impurities in wastewater, and the precipitated wastewater solution is discharged into the electrolytic cell through the top opening of the centrifuge cylinder for electrolytic sedimentation, thus facilitating rapid sedimentation of wastewater.

The utility model belongs to the technical field of crop planting auxiliary equipment, provide a kind of additional film breaking device of perforating machine for agricultural planting, including the fixed seat for installing additional film breaking device on perforating machine, the film breaking arm of adjustable position installed on fixed seat, film breaking arm is installed with film breaking assembly at one end away from fixed seat;Film breaking assembly includes annular film breaking knife assembly, and drill rod installed in the annular cavity of annular film breaking knife assembly, there are a plurality of film teeth on the sidewall of drill rod.The utility model has the advantages of film breaking before punching, film winding prevention, avoiding serious damage to mulch film, easy and labor-saving operation.

This invention provides a method for complexing and leaching beryllium from lepidolite leaching residue. The lepidolite leaching residue is mixed with a sulfuric acid solution containing DTPA, and the pH is adjusted to 0.1-1.5, the DTPA concentration to 0.03-0.1 mol / L, and the solid-liquid ratio to 1g:8-15mL. The resulting slurry is ball-milled, and the exposed beryllium is in situ complexed by DTPA through mechanochemical processes to disrupt the mineral phase lock-in. After solid-liquid separation, a beryllium-containing filtrate and purified residue are obtained. This invention achieves a beryllium leaching rate of over 60%, effectively solving the problems of deep beryllium lock-in and deactivation of chelating agents under strong acid conditions. The process operates at room temperature and low energy consumption, showing promising prospects for industrial application.

This invention provides an imidacloprid recrystallization refining and purification device, belonging to the technical field of purification devices. It includes a mixing chamber inner liner, with a mixing chamber outer shell fixedly installed outside the inner liner. The inner wall of the mixing chamber outer shell and the outer wall of the mixing chamber inner liner enclose a sealed heating chamber. A crystallization chamber inner liner is provided on the side of the mixing chamber outer shell, and a cooling crystallization tube is provided inside the crystallization chamber inner liner. An adaptive disturbance mechanism is provided inside the crystallization chamber inner liner. This adaptive disturbance mechanism can adjust the disturbance amplitude of the imidacloprid solution according to its crystallization degree. In this invention, by providing an adaptive disturbance mechanism, core components such as a float, a swinging linkage, a telescopic rod, and a stirring plate are integrated. The float senses the density change of the imidacloprid solution in real time at each crystallization stage, generates corresponding buoyancy based on the density, and achieves lifting and lowering. This, in turn, links the swinging linkage to swing around the slider on the limiting post, driving the telescopic rod to extend and retract radially along the sealed tube, ultimately achieving adaptive adjustment of the disturbance amplitude of the stirring plate.

The invention relates to the field of yarn winding, in particular to a yarn winding device for a warping machine, which comprises a winding mechanism box body, a winding roller is mounted at the driving end of the winding mechanism box body, a yarn guide unit is arranged on the winding mechanism box body above the winding roller, and a second yarn guide plate is mounted in the middle of the upper surface of the winding mechanism box body above the winding roller. According to the yarn breaking protection unit, yarn on the winding roller and the yarn releasing roller can be synchronously protected only through driving of a motor, the yarn is fixed under pressing of a yarn pressing bar and pressing of a first yarn pressing frame and a second yarn pressing frame, the yarn is prevented from being scattered to the yarn releasing roller and the winding roller, and the yarn breaking protection unit is used for protecting the yarn on the winding roller and the yarn releasing roller. The yarn loosening caused by the unwound yarn is prevented, manual winding is also needed, and the processing time needed after the yarn breaking phenomenon occurs in the winding process is saved.

The utility model belongs to the technical field of soil pesticide residue detection devices, and provides an agricultural planting soil pesticide residue detection device which comprises a main body mechanism and a mixing box, a box cover is arranged at the upper end of the mixing box, a feeding groove is fixedly communicated with the upper end of the box cover, and a sealing plug is arranged at the lower end of the mixing box; and the auxiliary mechanism comprises a supporting frame fixedly installed at the upper end of the box cover, and a crushing assembly is installed on one side of the supporting frame and in the feeding groove. By arranging the crushing assembly, firstly, crushing and stirring linkage can be realized through a driving motor as a power source, the electric energy of the detection device can be saved, secondly, shearing force generated by rotation of a driving crushing roller and a driven crushing roller can crush sample introduction soil, organic substances in the soil can be dissolved by a dissolving solution, and the detection efficiency is improved. The efficiency of pesticide residues is improved, and the situation that the accuracy of a soil detection result is reduced due to the fact that large soil blocks are wrapped together and organic substances are not thoroughly dissolved by a dissolving solution is avoided.

The invention belongs to the field of preparation of medical materials, and particularly relates to a preparation method of medical-grade high-purity lithium carbonate, which comprises the following steps: carrying out replacement reaction on metal lithium and deionized water to prepare a lithium hydroxide solution; introducing carbon dioxide gas into the lithium hydroxide solution, carrying out carbonization treatment, controlling the pH at the end point of the carbonization reaction to be 8-10.5, and then carrying out solid-liquid separation treatment to obtain a lithium bicarbonate solution; carrying out heat preservation treatment on the lithium bicarbonate solution at the temperature T and the pressure P, and separating to obtain pharmaceutical-grade high-purity lithium carbonate; the temperature T ranges from 90 DEG C to 98 DEG C, and the P ranges from 0.01 Mpa to 0.09 Mpa. According to the method, lithium carbonate is synthesized by utilizing a reaction mechanism of replacement-carbonization and thermal insulation transformation treatment, and on the basis, the combination of the pH value of carbonization and the temperature T and pressure P of thermal insulation treatment is further matched, so that the nucleation behavior of lithium carbonate can be accidentally controlled, the nucleation wrapping of impurities is reduced, and the purity of lithium carbonate is improved. Therefore, lithium carbonate which meets medical application requirements and has excellent particle size uniformity can be prepared with high direct yield based on a simple means.

The invention discloses a fresh food packaging machine, comprising a frame, an unwinding mechanism, a tunnel-type heating device, an upper electric heating block that can be raised and lowered, and a film-wrapping conveyor belt and a film-pulling mechanism are arranged on the frame. The film-wrapping conveyor belt can be used to convey a tray containing fresh food. The unwinding mechanism comprises an unwinding device and a rotating roller, both of which are arranged on the frame, and a plurality of pricking needles are arranged on the rotating roller. The unwinding device is used to release the rolled film, and the pricking needles can pierce the film, and the film is folded to the right to form an upper half film and a lower half film. The film-pulling mechanism is used to drive the upper half film and the lower half film to move above the film-wrapping conveyor belt along the conveying direction of the film-wrapping conveyor belt. The upper electric heating block and the lower electric heating block are both L-shaped and arranged on the frame, the upper electric heating block is located in front of and to the right of the film-wrapping conveyor belt, and the lower electric heating block and the upper electric heating block are arranged correspondingly up and down. The tunnel-type heating device and the film-wrapping conveyor belt are arranged in the front-to-back direction. The packaging machine replaces manual film-wrapping, has a high speed, and is suitable for large-scale fresh film-wrapping.

The invention discloses an injection mold structure for manufacturing a motorcycle ABS brake part, and relates to the technical field of injection molds of brake parts, the mold comprises a movable mold seat plate, the bottom of the movable mold seat plate is movably connected with a fixed mold seat plate, the top of the movable mold seat plate is fixedly connected with a sprue gate in a penetrating manner, and the top of the fixed mold seat plate is fixedly connected with a brake disc type mold cavity; a demolding assembly used for rapid demolding is arranged in the fixed mold base plate, an auxiliary assembly used for reducing bubbles is arranged at the bottom of the brake disc type mold cavity, edge grinding in the uniform demolding process is achieved through matched use of the demolding assembly, and due to the fact that an auxiliary part rotates to drive a formed brake disc to move upwards as a whole, the brake disc is evenly stressed, and the service life of the brake disc is prolonged. In the demolding process, the brake disc cannot incline, shape distortion and damage are avoided, the device is suitable for positioning and clamping of a mechanical arm, manual operation is not needed, the grinding step and the demolding step are combined, the requirement for subsequent independent edge grinding treatment can be reduced, and therefore the production process is simplified.

The invention provides a thermal control design method for a cabin opening type spacecraft. The thermal control design method comprises the steps that 1, a main body structure of the spacecraft is integrally formed through an aluminum alloy machining process; and 2, spraying or mounting each surface of the main body structure by adopting a thermal control coating with low solar absorptivity and high infrared emissivity. The invention has the following beneficial effects: by designing the relatively strong multi-layer flexible cabin plate on the side surface with relatively large external heat flow of the spacecraft, the sun direct illumination heat flow isolation of the maximum heat flow in the external heat flow of the orbit is realized, so that the influence of the external heat flow on the temperature of the spacecraft is greatly weakened; on the premise that an external heat conduction device does not need to be additionally arranged, the situation that the temperature gradient of the side with the large external heat flow and the side with the small external heat flow of the spacecraft is too large is effectively avoided through the high heat conduction performance of the integrated structure; a thermal control film is mounted on a traditional industrial conductive anodic oxidation coating or thermal control paint is sprayed on the traditional industrial conductive anodic oxidation coating, so that the solar absorptivity and the infrared emissivity of the five outer side walls of the whole satellite main structure are adjusted, and the temperature of spacecraft equipment meets the corresponding temperature index requirement.

The invention discloses a device for carbonation reaction of desulfurization gypsum, and belongs to the technical field of chemical production equipment, the device comprises a reactor shell, an isolator is arranged in the reactor shell, the inner space of the reactor shell is divided into a calcium sulfate leaching area and a carbonation reaction area by the isolator, the isolator comprises a leaching layer, and the leaching layer is arranged in the reactor shell. The internal space of the reaction device is divided by the isolator, so that the dissolution process and the carbonation reaction process of calcium sulfate are carried out in different spaces, the space for generating calcium carbonate is separated from the space where calcium sulfate particles are located, and the produced calcium carbonate cannot be polymerized on the surfaces of the calcium sulfate particles to influence the conversion of calcium sulfate; therefore, the conversion rate of calcium sulfate is higher, and the problem that calcium carbonate generated by carbonation reaction is easy to polymerize on the surfaces of calcium sulfate particles and the conversion rate of calcium sulfate is influenced due to the fact that the dissolution and reaction processes of desulfurized gypsum are carried out in the same space in the prior art is solved.

The invention discloses a preparation method of a quartz crucible, and relates to the technical field of quartz crucibles, since a quartz crucible prefabricated part is prepared firstly and then a transparent layer is coated by gas refining, interface mixing of high-purity inner-layer sand and low-purity middle-layer sand or outer-layer sand is avoided, the interface is clearer, and the use amount of the inner-layer sand is reduced; the glassy-state high-purity quartz sand is firstly softened and then molten, so that when the synthesized glassy-state high-purity quartz sand is adopted as the inner-layer sand, the preparation method of the quartz crucible provided by the invention avoids the coating of the inner-layer sand on the middle-layer sand, reduces bubbles in the transparent layer of the quartz crucible, and improves the quality of the quartz crucible. Therefore, the adverse effect of bubbles on the use effect and the service life of the quartz crucible is avoided.

The application relates to the technical field of solid-liquid reaction equipment, in particular to a device for solid-liquid reaction. The device is characterized in that a liquid inlet is arranged on the side wall of a reaction body near the top end, so that liquid-phase materials can be fed from the top of the reactor; the disturbance suspension disc is combined with the hollow shaft to make up-and-down reciprocating motion, so that high-concentration liquid-phase materials gradually flow to the bottom of the reaction body; the solid-phase materials are gradually fed into the feeding pipe through the spiral conveying mechanism, and then enter the bottom of the reaction body through the feeding pipe to contact and react with the low-concentration liquid-phase materials formed by reaction; when the disturbance suspension disc makes up-and-down reciprocating motion with the hollow shaft, the solid-phase particles are disturbed to suspend upward, and then contact and react with the liquid-phase materials with higher concentration, so that the relative amount or relative concentration of the solid-phase materials and the liquid-phase materials when they contact is weakened, the intensity of the reaction is weakened, the safety is improved, the small solid-phase materials can be prevented from being wrapped in the product, and the thoroughness of the reaction is improved.

The utility model discloses a raw material grinding device for printing ink production, which comprises a grinding barrel, a grinding groove is arranged in the grinding barrel, grinding components capable of keeping meshing with each other are arranged in the grinding barrel, grinding rollers keeping meshing with each other are inserted in the grinding components, and conveying belts are correspondingly arranged at the bottoms of the grinding rollers. Second protruding blocks are arranged on the outer walls of the conveying belts so as to keep meshing with the grinding rollers, and the grinding rollers are driven to keep axial rotation so as to drive the conveying belts to keep axial rotation. According to the raw material grinding device for printing ink production, the teeth can be kept meshed with the second protruding blocks on the outer wall of the conveying belt, when the grinding roller rotates in the axial direction, the conveying belt can be driven to rotate, the grinding balls can be inserted into the first protruding blocks, materials can be scraped off and fall onto the conveying belt, the outer wall of the grinding roller is prevented from being wrapped by the materials, and the service life of the grinding roller is prolonged. And the conveying belts are kept meshed, so that secondary grinding work can be carried out.

The invention belongs to the technical field of air purification materials, and discloses an antibacterial formaldehyde removal catalyst as well as a preparation method and application thereof. The antibacterial formaldehyde removal catalyst comprises a perylene quaternary ammonium salt-graphene composite antibacterial agent, a catalytic active component, an inorganic biochar binder and a pore forming agent, manganese dioxide granulation is achieved by constructing a porous framework, the activity of manganese dioxide is reserved, graphene inhibits agglomeration through a flexible sheet layer and establishes a conductive path, and the common core lies in that through structure fixation instead of dense wrapping, the smoothness of a reactant diffusion channel is maintained to the maximum extent while the particles are endowed with mechanical strength, and the mechanical performance of the particles is improved. Shielding and sintering of active sites in the granulation process are avoided, so that the catalytic activity of manganese dioxide is efficiently reserved; the catalyst has a dual-function integrated effect, and also has efficient room-temperature catalytic formaldehyde removal capability and broad-spectrum antibacterial capability, so that the structure of an air purification system is simplified.

The invention discloses a lithium ion sieve and a preparation method thereof.The preparation method of the lithium ion sieve comprises the steps that a lithium ion sieve precursor, a bonding forming agent and a pore forming agent are mixed, the obtained mixed material is heated and extruded, and particles A are obtained; mixing the particles A with an acid solution, performing acid activation, and drying to obtain the lithium ion sieve adsorbent, the surface of the lithium ion sieve precursor is coated with a gel isolation layer. The lithium ion sieve precursor is firstly coated with the magnesium hydroxide protective layer, resin is effectively prevented from being directly bonded with the surface layer of the lithium ion sieve in a molten state and blocking an ion channel, the plasticizer is added, the processability of the molten mixture is improved, and the proportion of the resin is reduced. The Cl <->-containing group of PVC is easily substituted by OH <-> under the alkaline condition, so that the hydrophilic performance of the resin is improved, and the lithium ion sieve particles prepared by the technical scheme have high adsorption rate and high hydrophilicity.

The invention discloses a method for improving the grade of phosphorite and removing impurities through a calcination-digestion method, and relates to the technical field of phosphorite beneficiation. The method comprises the following steps: phosphorite crushing: phosphorite raw materials are conveyed to a jaw crusher for coarse crushing, ores subjected to coarse crushing enter a cone crusher for intermediate crushing, ores subjected to intermediate crushing enter a ball mill for fine crushing, and meanwhile, an ultrasonic vibration device is additionally arranged in the ball mill. Impurity wrapping is avoided and the subsequent reaction efficiency is improved by precisely regulating and controlling the granularity during crushing and by means of ultrasound, impurities are strongly decomposed and volatilized through precise temperature control, stable temperature rise and microwave assistance during calcination, phosphate is activated and enriched, the concentration, the liquid-solid ratio and the like are optimized in the digestion link, a chelating agent is added, deep impurity removal is achieved, and phosphorus recovery is guaranteed. Through fine control, the impurities are greatly reduced, the yield is remarkably improved, the product quality is optimized, meanwhile, efficient utilization of resources and environmental protection are considered, and innovation and sustainable development of the phosphorite beneficiation technology are powerfully promoted.

The invention relates to the technical field of preparation of amoxicillin, in particular to a method for reducing the impurity content of amoxicillin. The invention provides a method for reducing the impurity content of amoxicillin, which comprises the following steps: continuously adding an amoxicillin reaction solution and an acidic regulator to obtain a dissolved reaction solution; adding the dissolved and clarified reaction liquid and a first alkaline regulator for the first time, and carrying out first-stage crystallization to obtain a first crystallization liquid; adding the first crystalline liquid and a second alkaline regulator for secondary crystallization to obtain a second crystalline liquid; the second crystallization liquid is subjected to crystal growing, and amoxicillin is obtained; the first-stage crystallization and the second-stage crystallization are carried out under a stirring condition, and the stirring rotation speed of the first-stage crystallization is greater than that of the second-stage crystallization. The method reduces the generation of impurities in the post-treatment process.

The invention belongs to the technical field of battery material preparation, and particularly relates to coated graphite as well as a preparation method and application of the coated graphite. The coated graphite comprises graphite and a fast ion conductor continuous coating layer coated on the surface of the graphite, the average particle size of a fast ion conductor in the coated graphite is less than 5nm, the average particle size of the fast ion conductor is small, the fast ion conductor presents a continuous coating effect, and an independent island-shaped coating effect does not appear. It is guaranteed that active sites of the fast ion conductor continuously cover the surface of the graphite, the active sites are increased, and the fast charging performance of the coated graphite is improved.

The application discloses a kind of low corrosion low temperature resistant ship water film forming foam extinguishing agent and preparation method thereof.The extinguishing agent is made of deionized water, 1,2-propanediol, sodium lignosulfonate, alkyl polyglycoside, polyether modified heptamethyltrisiloxane, sodium molybdate dihydrate, methyl benzotriazole, xanthan gum and triethanolamine.In the system, sodium molybdate dihydrate and sodium lignosulfonate are coordinated and crosslinked to form a three-dimensional skeleton under the buffer of triethanolamine, and the hydrophobic segment of the surfactant is intercalated and anchored in the hydrophobic microzone inside the skeleton.During preparation, 1,2-propanediol is used to pre-disperse polymer powder, the crosslinking rate is controlled by adding triethanolamine in batches, and the surfactant is added after the system is cooled to complete the cold intercalation.The application limits the self-aggregation and precipitation of surfactant at low temperature, avoids the problem of polymer water core and excessive crosslinking, maintains the stability of rheology, and effectively reduces the corrosion of ship metal equipment.

The present invention provides an outer cup and a hip joint prosthesis having the same. The outer cup comprises: an outer cup body having a first accommodating cavity and a first opening, the outer cup body being made of a metal material; a stop ring being arranged on the outer side wall of the outer cup body close to the first opening, the stop ring being made of a medical polyethylene material or a plastic material. The technical solution of the present invention can effectively solve the problem in the prior art that the outer cup and the inner liner of the hip joint prosthesis are easily wrapped by soft tissue.

This invention discloses a method for removing impurities from ferrous sulfate, a byproduct of titanium dioxide production, comprising the following steps: 1) taking ferrous sulfate and preparing a saturated solution; 2) adding dilute phosphoric acid, stirring thoroughly, and filtering to remove insoluble matter; 3) adding an appropriate amount of ammonia to the obtained solution, filtering, and evaporating the filtrate; 4) slowly stirring and cooling the remaining solution until the solution temperature drops to 10°C, centrifuging to obtain primary crystals and primary crystallization mother liquor; 5) dissolving the obtained primary crystals again and preparing a saturated solution, repeating steps 3) and 4) to obtain secondary crystals and secondary crystallization mother liquor; 6) dissolving the secondary crystals to prepare a ferrous sulfate solution, which can be directly used for the preparation of battery-grade iron phosphate. This method uses phosphoric acid, ammoniation, and recrystallization to remove impurities from ferrous sulfate through multiple processes. After impurity removal, the heptahydrate ferrous sulfate solid has high purity and low metal impurity content, and can be directly used for the synthesis of battery-grade iron phosphate after dissolution.

The utility model relates to the technical field of geosteering equipment, and discloses a gamma tool. The utility model provides a gamma tool which comprises a drill bit, a connecting sleeve, a connecting seat, a transmitting tube and a gamma assembly, the connecting sleeve is installed on the top of the drill bit, the connecting seat is arranged on the connecting sleeve in a threaded mode, the transmitting tube is installed on the connecting seat on the lower portion, the gamma assembly is arranged in the transmitting tube, and the transmitting tube is provided with the other connecting seat. The device further comprises a guide disc, a pushing frame, guide rods, a limiting frame, a first elastic piece and a first clamping rod, the guide disc is installed on the connecting base, the pushing frame is rotationally arranged on the guide disc, and the multiple guide rods are fixedly connected to the connecting base on the lower portion. The limiting frame moves upwards to drive the first clamping rod to move upwards to be disengaged from the connecting sleeve, then the connecting base is rotated, the connecting base is disengaged from the connecting sleeve, the drill bit is detached, and therefore the drill bit is convenient to replace.

The invention relates to the technical field of iron phosphate production, and discloses a battery-grade iron phosphate production method based on raffinate acid and a preparation method of lithium iron phosphate thereof, and the method comprises the following steps: 1) adjusting the pH value of the raffinate acid with ammonia water, adding a fluorination auxiliary agent, carrying out heat preservation stirring, and filtering to obtain a filtrate A; (2) taking the preheated and impurity-removed ferrous sulfate solution as filtrate B, adding a mixture of the filtrate A and hydrogen peroxide into the filtrate B, regulating the pH value of the system by using ammonia water, preserving heat for at least 30 minutes, and filtering to obtain a primary filter cake; 3) washing the primary filter cake until the conductivity of the washing water is less than 3.5 ms / cm, mixing phosphoric acid, pure water and the filter cake for size mixing, aging until the color of the size is changed, continuously keeping the temperature, filtering, washing the secondary filter cake until the conductivity of the washing water is less than 2.5 ms / cm, drying, calcining and crushing to obtain battery-grade iron phosphate; the raffinate acid is used for replacing monoammonium phosphate or diammonium phosphate, the preparation process is shortened, the production efficiency is improved, and the material meeting the requirements of battery-grade iron phosphate can be directly prepared.