37 results about "Wax removal" patented technology

The present application belongs to the technical field of oil well wax removal and prevention, and relates to a shale oil well shaft wax removal and prevention agent and a preparation method thereof. The shale oil well shaft wax removal and prevention agent comprises the following raw materials in percentage by mass: 40-55% of an oily solvent, 1-3% of a cosolvent, 1-2% of an imidazole double-trifluoromethylsulfonylimide salt, 10-20% of a wax crystal modifier, 3-5% of an emulsifier, 1-2% of an alkaline adjusting agent, and 25-35% of water, with the sum of the percentage by mass of each raw material being 100%; the wax crystal modifier is prepared by copolymerizing (methyl) acrylic C12-C16 ester, (methyl) acrylic C1-C3 ester and (methyl) acryloyl chloride, and then reacting with C20-C30 alkyl alcohol. The wax crystal modifier in the present application has long-mid-short branched chains, and cooperates with the imidazole double-trifluoromethylsulfonylimide salt to improve the wax removal effect and low-temperature fluidity, thereby achieving high-efficiency wax removal and prevention effect and still maintaining good wax removal and prevention effect at low temperatures.

The application discloses a cleaning method of a silicon carbide substrate. The method comprises the following steps: firstly, removing the polishing liquid, strongly adsorbed substances and large particles remaining on the surface of a ceramic disc and the silicon carbide substrate by adopting a hydrogen peroxide ultrasonic immersion method; then, immersing the ceramic disc and the silicon carbide substrate in isopropyl alcohol to dissolve the wax on the surface and the edge, remove the surface wax, and reduce the adsorption of the wax between the silicon carbide substrate and the ceramic disc; further, the method is beneficial to realize wafering at low temperature, avoid high-temperature wax dry setting, and increase the cleaning difficulty; then, the wax is removed by immersing the ceramic disc and the silicon carbide substrate in isopropyl alcohol again; finally, the two-step wax removal cleaning process and the ultrasonic cleaning process of super-pure water are adopted to realize the purpose of removing the residual substances without dead angle; in addition, the service life of the wax removal cleaning liquid is effectively prolonged, and the generation amount of the cleaning waste liquid is reduced, so that the application discloses a high-efficiency, green and environment-friendly cleaning method of the silicon carbide substrate.

The invention belongs to the technical field of oil exploitation, and particularly provides an oil nozzle sleeve wax removing device and method.The oil nozzle sleeve wax removing device comprises a gun head, a lead screw, a connecting rod, a crank, a gear set, a rotating handle, a connecting fixing plate and a fixed positioning sleeve, the right end of the connecting rod is connected with the left end of the lead screw, the right end of the lead screw is connected with the gun head, and the lead screw is sleeved with the fixed positioning sleeve; the other end of the crank, the left portion of the connecting fixing plate and the gear set are sequentially connected from back to front, the rotating handle is connected with the gear set, and the right end of the connecting fixing plate is connected with the fixing positioning sleeve. The problems that in the paraffin removal operation process of an oil nozzle sleeve on an existing oil extraction site, a paraffin block structure of the oil nozzle sleeve is difficult to damage through a screwdriver or a crow bar or other tools, paraffin extraction is difficult, time-consuming and labor-consuming, and oil well production is affected are solved. Single-well wax removal operation can be achieved by one person without a power source, the labor intensity is reduced, the working efficiency is high, and the operation cost is saved.

The present invention is directed to a device comprising a fabric substrate layer having a dividing line horizontal to the length of the fabric substrate layer that divides a first part coated with a skin-safe adhesive layer on one side and a second part that is not covered by the skin-safe adhesive layer; and methods of application therefrom.

The application discloses a self-cleaning crude oil wax removal filter system and belongs to the technical field of crude oil conveying and filtering. The system comprises a filter structure installed on a crude oil conveying pipeline. The filter structure comprises a plurality of groups of parallel filter pipe groups. Each group of filter pipe groups is composed of a communication pipe, a filter with an embedded filter screen, a pressure transmitter, a control valve group, a backwashing unit and / or a heating unit, and a control unit. The control unit determines the working condition based on the pressure conveying standard. If the pressure is qualified, the operation is maintained. If the pressure is unqualified, the control valve group is closed, the blowdown valve is opened, and the backwashing unit and the heating unit are started, so that the self-cleaning operation of the inside of the filter pipe group is realized. The application realizes intelligent self-cleaning, guarantees the continuity of crude oil conveying, improves the wax removal filtering efficiency, is suitable for various conveying scenes of waxy crude oil, and can solve the problems of manual cleaning, discontinuous conveying and poor wax removal effect of the traditional filter system.

Disclosed in the present invention are a wax removal and inhibition agent, and a preparation method therefor. The wax removal and inhibition agent comprises an alkyl acrylamide-imide-quaternary ammonium salt polymer, and the polymer comprises a structural unit as represented by formula I, a structural unit as represented by formula II and a structural unit as represented by formula III, wherein R1 is selected from a hydrogen atom or an alkyl; R2 is selected from a group containing a quaternary ammonium salt; R3 is selected from a hydrogen atom or an alkyl; R4 is selected from an alkyl; R5 is selected from a hydrogen atom or an alkyl; and R6 is selected from a group containing an imide structure as represented by formula IV: formula IV. The wax removal and inhibition agent of the present invention has both good wax removal and wax inhibition effects.

The utility model discloses a multifunctional wax repairing instrument which comprises a wax repairing instrument body, a heating module is installed at the top end of the wax repairing instrument body, a heating plate which is obliquely placed is connected to the heating module, the side wall of the front end of the heating plate is located below the side wall of the rear end of the heating plate, side plates are connected to the side walls of the two sides of the heating plate, and the side plates are connected to the side walls of the side plates. A partition plate is connected to the middle of the top end of the heating plate, a driving structure is arranged on the side plate, a limiting supporting structure is arranged on the heating plate, and a storage structure is installed on the side wall of the front end of the heating plate. A new wax block is placed between the movable plate and the side plate, the movable plate and the side plate clamp the newly-placed wax block, and therefore the effect of uninterruptedly placing the wax block for wax removal is achieved, the wax removal efficiency is improved, meanwhile, the side plate, the movable plate, the partition plate and the heating plate are attached to the three faces of the wax block, the side wall of the wax block is synchronously heated in a multi-angle mode, and the wax removal efficiency is improved. Therefore, the wax removal efficiency of the wax block is improved.

The invention relates to the technical field of oilfield chemistry, in particular to a paraffin removal viscosity reducer for hydraulic jet paraffin removal and a use method thereof, the paraffin removal viscosity reducer for hydraulic jet paraffin removal comprises the following raw materials in percentage by mass: 0.1-0.5% of octadecanol, 5-10% of eicosyl heavy mahogany petroleum sulfonate, 5-20% of ethanol, 1-5% of polyethylene oxide surfactant, 10-20% of betaine surfactant, 0.1-0.2% of hydroxyethyl cellulose and the balance of water. And the paraffin removal viscosity reducer is used for adding a required amount of the paraffin removal viscosity reducer into a working medium to obtain a paraffin removal working solution, the paraffin removal working solution is injected into the light casing oil well in a 10-13MPa hydraulic jet fluid form, and the paraffin deposits on the casing wall of the light casing oil well are cleaned by using the hydraulic jet fluid. The paraffin removal and viscosity reduction agent disclosed by the invention is simple in preparation method, can achieve a synergistic effect with a hydraulic jet fluid technology, and can maintain efficient paraffin removal and viscosity reduction performance in a high-salinity and high-specific-gravity slurry or solid-free well killing fluid environment.

The utility model discloses a progressive heating wax removal device, and belongs to the field of heating wax removal devices. A progressive heating wax removal device comprises a water tank, a plurality of splitter plates are fixedly connected to the interior of the water tank and used for dividing the space in the water tank, a plurality of heating wires located on the two sides of the splitter plates are fixedly connected to the bottom of the inner wall of the water tank, and the heating wire on the rightmost side is in a normally-open state and keeps the highest required temperature; the water flow heated by the rightmost heating wire sequentially flows into the space divided by the leftmost splitter plate through the tops of the splitter plates; the heating wire on the rightmost side is normally opened, and the other heating wires are closed, so that the total energy consumption is remarkably reduced, the splitter plate divides the space of the water tank, water flow is forced to overflow from a right high-temperature area to a left low-temperature area, a gradual temperature gradient is formed, and heat waste caused by direct mixing of cold and hot liquid is avoided; impact of frequent start and stop of the heating wire on temperature is reduced, and equipment service life is prolonged.

The application discloses a wax printing method for double-side wax coating, and the method steps comprise the following steps: 1, coating paraffin pattern on the front side of the cloth, the pattern in the middle is in the shape of a pattern, and the outer side is in the shape of a stripe; 2, sticking adhesive tapes on the back side of the cloth except the position opposite to the stripe shape, and coating a layer of microcrystalline wax on the rest part, the position of the microcrystalline wax layer corresponds to the stripe shape on the front side of the cloth; 3, removing the adhesive tapes on the back side of the cloth which have been coated with the microcrystalline wax, and then putting the cloth into a dye vat for immersion dyeing; 4, putting the cloth after the immersion dyeing into boiling water for wax removal; and 5, washing the cloth after the wax removal with clean water, and then cooling and drying to obtain the finished wax printing cloth. Through the wax printing method, the production and processing efficiency is improved, and the cost of the wax printing cloth is greatly reduced. The wax printing cloth processed by the method has clear pattern levels and obvious contrast effect, and the quality is greatly improved, and the effect is very obvious.

The invention belongs to the technical field of gradient particle size abrasive cloth manufacturing, and particularly relates to a gradient particle size abrasive cloth manufacturing method which comprises the following steps that S1, base material pretreatment is conducted, specifically, a cloth base is used as a main material for raw cloth treatment, the treatment process comprises singeing, dewaxing, dipping, stretching shaping and calendaring, and then gum application or printing is conducted; s2, primer coating is conducted, specifically, primer is roller-coated through a roller coating machine, the primer is one of phenolic aldehyde, epoxy and polyurethane, then low-temperature pre-drying is conducted, and the temperature is kept between 80 DEG C and 120 DEG C; s3, gradient sand planting is conducted, specifically, coarse sand planting and fine sand planting are conducted, the coarse sand planting mode is electrostatic sand planting, large-particle-size abrasive materials are evenly planted on primer, the fine sand planting mode is gluing again, small-particle-size abrasive materials are planted, and a complete gradient is formed; according to the device, the problem that the gluing quality is greatly reduced due to poor gluing uniformity and low smoothness in the gluing process when abrasive cloth with gradient particle sizes is manufactured at present is solved.

The invention belongs to the technical field of precision casting, and provides a high-strength pouring gate rod which comprises a heat conduction mold core and a wax layer wrapping the outer side of the heat conduction mold core. And during dewaxing, the wax layer is firstly melted, so that a dewaxing channel is formed between the heat conduction mold core and the mold shell. According to the high-strength pouring gate rod, the composite structure of the heat conduction mold core and the wax layer is arranged, the problem that a traditional solid pouring gate rod is large in wax consumption is firstly solved, a large amount of wax materials are replaced with the heat conduction mold core, and wax material consumption is reduced; secondly, due to the high-strength characteristic of the heat conduction mold core, the defect that a traditional wax pouring gate rod is poor in strength is overcome, and the pouring gate rod is prevented from being deformed or damaged in the tree assembling process; meanwhile, the heat conduction mold core has good heat conductivity and can accelerate heating melting of a wax layer, a wax discharging channel formed after the wax layer is molten can enable wax liquid to be rapidly discharged, the problems that due to the fact that a traditional solid pouring gate rod is large in overall thickness and dewaxing is late, the wax liquid is retained, and extrusion force is generated on a mold shell are solved, and the cracking risk of the mold shell is effectively reduced.

The present application relates to a kind of precision micro stepping motor wax removal methods, comprising the following steps: 1) after organic solvent water bath is heated to constant temperature, stator is immersed in organic solvent ≥30min;2) take new organic solvent water bath and heat to constant temperature, use circulating pump to flush the inner hole of stator, and each stator flushing time ≥1min;3) using anhydrous ethanol along the inner hole of stator axial reciprocating wash ≥20 times, then room temperature is placed ≥10min;4) stator is placed into high-low temperature test chamber and is treated at high-low temperature, first at high temperature and is kept ≥20min, then temperature is changed to low temperature and is kept ≥10min, repeat high-low temperature treatment at least 4 times, low temperature recovers to normal temperature and is taken out;5) repeat step 1) to step 3) or step 2) to step 3);The present application improves the effect of paraffin wax cleaning under the stator winding structure, improves production efficiency, and reduces the amount of solvent used.

The device comprises a conical flask and a glass straight-through tube, the lower end of the glass straight-through tube extends into the conical flask, and the upper end of the glass straight-through tube is connected to a conical flask opening through a test tube buckle and a latex plug. The invention also discloses a method for measuring the paraffin removal rate of microorganisms and bacterial liquid, which comprises the following steps: introducing the glass straight-through pipe into a molten wax sample or high-wax-content crude oil, slowly rotating, taking out the glass straight-through pipe after the paraffin or high-wax-content crude oil completely wraps the liquid-immersed straight-through pipe, repeating the operation for 3-5 times to simulate a wax precipitation oil pipe in a shaft, and aging and weighing the treated straight-through pipe; preparing a fermentation culture medium, introducing a straight-through pipe into the fermented culture medium, carrying out shaking table culture, lightly washing a mycoderm adhered to the straight-through pipe with water, placing, and weighing after the surface is dried; and finally, the paraffin removal rate is calculated through weighing data. By accurately calculating the paraffin removal rate, the use of the paraffin remover can be effectively evaluated and optimized, so that the paraffin precipitation phenomenon of an oil well is reduced. This helps to improve the production and production efficiency of an oil well.

The utility model provides an oil well paraffin removal tool, and belongs to the technical field of cleaning. Comprising a shell, a paraffin removal assembly is installed on the shell, the paraffin removal assembly is used for removing paraffin attached to the inner wall of an oil well, the paraffin removal assembly comprises a first rotating rod, the first rotating rod is rotationally arranged on the inner wall of the shell, a plurality of blades are fixedly arranged on the outer side wall of the first rotating rod, and a high-temperature hot melting head is fixedly arranged on the outer side wall of the first rotating rod; a motor is fixedly arranged on the side, away from the blade, of the shell. The output end of the motor is fixed to the first rotating rod. Through the arrangement of the wax removal assembly, after thick wax is broken through cutting of the blade, waste heat of the high-temperature hot melting head can further soften broken wax, and the situation that the broken wax is attached again due to cooling and solidification is avoided; a scraping plate of the paraffin scraping assembly is tightly attached to the well wall through reciprocating motion, thin-layer paraffin left after cutting of a blade can be removed, the paraffin removal rate is increased through the collaborative process of cutting, hot melting and scraping, and repeated paraffin removal operation is reduced.

A well treatment composition wax removal additives for the cleaning of a well containing hydrocarbons waxes. The wax removal additives comprise nano polysaccharides. A method of cleaning a hydrocarbon well containing at least one of wax, asphaltenes or scale, by injecting a nano polysaccharide solution.

The invention relates to the technical field of semiconductor manufacturing, in particular to a method for improving the dewaxing capability of the back of a silicon wafer, which comprises the following steps of: 1, performing megasonic synergistic chemical pretreatment, and efficiently activating wax residues; pretreatment liquid is prepared, wherein DEA-TMAH-UPW mixed liquid is prepared; in the megasonic process, the silicon wafer is placed in a megasonic groove with the back face facing upwards, heated to a wax melting critical temperature interval and treated for 8-15 min; 2, gradient cleaning is conducted, wax residues and metal impurities are removed, UPW pre-cleaning is conducted, and SC1 deep cleaning is conducted after three-stage overflow groove series cleaning is conducted; removing metal by hydrochloric acid: soaking for 3-8 minutes at normal temperature by adopting 0.5%-3% diluted hydrochloric acid, and removing metal ions such as Fe, Cu and the like through chelation of chloride ions; thirdly, final washing and drying are conducted, and the surface cleanliness is guaranteed; infrared drying is performed after UPW final washing, and water drops on the surface are removed through nitrogen purging before drying, so that water marks are prevented from being formed.

The utility model belongs to the field of poultry processing equipment, and particularly relates to a pulse intelligent bionic wax raking machine, which comprises a poultry body conveying line to be subjected to wax raking, a wax raking machine, a wax raking machine and a wax raking machine, the wax raking device is arranged on the two sides of the poultry body conveying line to be subjected to wax raking and comprises a wax raking driving structure and a wax raking rod structure, and the wax raking rod structure is driven by the wax raking driving structure to carry out wax raking treatment on poultry bodies from top to bottom; and the following driving structure is used for driving the wax raking device to reciprocate along the poultry body conveying line to be subjected to wax raking, the following driving structure drives the wax raking device and the poultry body conveying line to be subjected to wax raking to move synchronously during the wax raking action, and after the wax raking action is completed, the following driving structure drives the wax raking device to reset to the initial position. The wax raking action can cover the surface of a poultry body more uniformly, the problem of missing treatment or non-uniform treatment is reduced, the wax raking success rate is increased, mechanical damage to the poultry body to be subjected to wax raking is reduced, and milder, more accurate and more efficient wax raking operation is achieved through bionic design and intelligent following.

The application discloses a self-power generation wax removing device and method, and the device comprises an oil layer sleeve, an annular space protective liquid, a gas and oil extraction pipe column, an electric wire, a pipeline control unit, a generator and a wellhead output pipeline, wherein the gas and oil extraction pipe column comprises an insulation layer, the gas and oil extraction pipe column is arranged in the oil layer sleeve, and the annular space protective liquid is filled between the gas and oil extraction pipe column and the oil layer sleeve; one end of the wellhead output pipeline is arranged in the gas and oil extraction pipe column, and the other end of the wellhead output pipeline is connected with a gas and oil receiving device and the generator through the pipeline control unit; one end of the electric wire is connected with the annular space protective liquid, and the other end of the electric wire is connected with the generator. The application utilizes the pressure difference between an oil nozzle and a downstream low-pressure area, adds a self-power generation device, and the power generation device and the circuit are completely in a closed and anoxic environment, and whether power generation is automatically controlled according to the temperature of the extracted fluid by a controller.

The utility model discloses a combined hollow wax discharge head for investment casting, and relates to the technical field of investment casting. The combined hollow wax discharge head for investment casting comprises a wax piece arranged on the inner side of a shell, and a lower wax discharge head arranged on the inner side of the shell. The lower wax discharge head is located on the outer wall of the wax piece, and the wax piece and the lower wax discharge head are both medium-temperature wax. The lower wax discharge head and the upper wax discharge head adopt a hollow structure, which greatly increases the heating area. The combined design of the lower wax discharge head and the upper wax discharge head is matched with wax materials with different melting points. When the wax is removed, the low-temperature invasion sealing wax melts first, and quickly opens part of the wax discharge channel. Then, the upper and lower wax discharge heads with the hollow structure melt faster than the wax piece due to the larger heating area. Before the wax piece starts to melt, a complete and unblocked wax discharge path is formed. This design greatly speeds up the wax discharge, effectively shortens the wax removal time, speeds up the production cycle, and reduces the risk of shell cracking.

The application discloses a heating wax-removing cleaning machine for quartz processing and relates to the technical field of quartz cleaning. The cleaning machine comprises a cleaning pot and a circulating assembly located below the cleaning pot. The cleaning pot is fixedly connected with a heater. The circulating assembly comprises a water storage tank in communication with the cleaning pot. The bottom of the outer side of the water storage tank is fixedly connected with a reflux pipe one. The reflux pipe one is fixedly connected with a water pump. The water pump is fixedly connected with a reflux pipe two. The reflux pipe two is in communication with the cleaning pot. An electric valve is arranged at the position where the reflux pipe one and the water storage tank are in communication. The quartz plate is subjected to the wax-removing operation in the cleaning pot. Then, the water and the hot-melt wax are separated in the water storage tank. The water separated from the hot-melt wax is discharged into the cleaning pot through the water pump, the reflux pipe one and the reflux pipe two, and is used for cleaning the subsequent quartz plate again, so that the water recycling is realized, the water resource is saved, and the subsequent quartz plate is not polluted due to the separation of the hot-melt wax from the water.

The utility model provides a kind of wax removal stick belongs to the technical field of preventing or limiting paraffin or similar substance deposition by chemical method.Wax removal stick includes the stick body for being thrown into gas production well to dissolve paraffin on the inner wall of oil pipe, stick body is cylindrical, through hole is set on stick body along the axial through stick body, through hole constitutes the exhaust passage for natural gas in gas production well to discharge upwards.Wax removal stick is thrown into gas production well to carry out wax removal, and natural gas can discharge upwards by through hole on stick body, does not affect gas production operation, so it is unnecessary to stop production, realizes side gas production, side wax removal, and does not affect production efficiency.

This invention discloses a surface polishing and cleaning method for indium antimonide based on gradient pressure release and dynamic chemical regulation. The steps include: waxing, primary rough polishing, secondary rough polishing, semi-fine polishing, wafer removal and wax removal, fine polishing, pre-cleaning, and cleaning. This method introduces a gradient pressure release strategy in the multi-stage polishing process, combined with dynamic chemical regulation of an organic acid and sodium salt system, to achieve progressive stress release and selective surface etching during polishing. In the fine polishing stage, an adsorption pad is used to stabilize the wafer, avoiding organic contamination introduced by traditional waxing. Combined with subsequent synergistic cleaning and surface passivation processes, an integrated polishing-cleaning-passivation synergistic process is formed. This invention can obtain a high-quality indium antimonide surface with a surface roughness Ra≤0.15nm, oxide layer thickness controlled within 1.2±0.3nm, no scratches, and ultra-cleanliness, significantly improving substrate surface quality and epitaxial growth compatibility.

The invention relates to a wax removal liquid and a preparation method thereof, the wax removal liquid is composed of a surfactant, an organic alkali, a chelating agent, a polyol solvent and water, the surfactant comprises alkyl glycoside, isopropanolamide, fatty alcohol-polyoxyethylene ether sulfate and sodium surfactin, and the organic alkali is an organic alkali. The prepared wax removal liquid has the characteristics of small surface tension, good infiltration capacity and the like, and can remove wax from a base material, so that the purpose of separating wax molecules from the surface of the base material is achieved.

This invention relates to the field of oilfield development technology, specifically to a rotary wax scraping assembly for wells with severe wax buildup, comprising: an installation rod, a wax scraping component, and an auxiliary scraping component. When encountering a thick, hard wax layer, the auxiliary scraping component reduces the radial dimension of the scraping end and increases the axial contact area between the scraping end and the wax layer, thereby achieving uniform segmentation and scraping of the thick wax layer, cutting it into smaller or thinner wax blocks. When encountering a thin wax layer, the auxiliary scraping component increases the radial dimension of the scraping end and reduces the axial contact area between the scraping end and the wax layer. Therefore, through this adaptive adjustment, the wax scraping component can still effectively scrape the wax layer, avoiding the accumulation of large wax debris due to excessive scraping area, and also preventing incomplete wax removal due to insufficient scraping area, thus reducing the risk of wax blockage in the oil well.

The application discloses an oil-in-water emulsion type wax remover and a preparation method and application thereof. The oil-in-water emulsion type wax remover comprises the following components in percentage by mass: 40-50% of an organic solvent; 0.3-0.51% of a surfactant; 5-10% of a mutual solvent; 0.5-1.0% of an alkaline regulator; and the balance of distilled water. The organic solvent comprises kerosene and an aromatic hydrocarbon solvent, and the aromatic hydrocarbon solvent comprises dimethylbenzene and a high-boiling-point aromatic hydrocarbon solvent. The oil-in-water emulsion type wax remover has suitable component formula, good synergy and strong wax removal capacity. The oil-in-water emulsion type wax remover can be used for removing wax deposition in a gas well wellbore and wax deposition in an oil well wellbore, and has the characteristics of fast wax removal rate, safe use, low toxicity and environmental protection.

The application discloses a ceramic plug for blocking a wax removal opening of a mold shell and an application method thereof. The application method of the ceramic plug for blocking the wax removal opening of the mold shell comprises the following steps: blocking the wax removal opening of the mold shell, and not damaging the mold shell in the application process. A plurality of stress convex bodies which are spaced apart from each other and are arranged at two axial ends of a ceramic plug body are wrapped by a mold shell, so that stress can be dispersed, and when a male thread of the ceramic plug body is screwed with a threaded hole in the ceramic plug body, the mold shell of the wax removal opening is not easy to be damaged, and the problem that the sand shell body of the inner cavity is easy to be damaged due to stress concentration when the sand shell body is put into or taken out of the inner cavity opening is solved.

The application discloses a kind of ceramic hot-pressing casting forming wax removal methods, comprising the following steps: S1, select white carbon black as adsorbent in the process of ceramic hot-pressing casting forming wax removal;S2, white carbon black is spread in the bottom of ceramic hot-pressing casting forming kiln furniture container to form white carbon black bottom layer with certain thickness;S3, the green body to be waxed is placed on white carbon black bottom layer, leave gap between green body and white carbon black bottom layer, then cover a layer of white carbon black on green body, so repeat until the kiln furniture container is filled;S4, carry out wax removal work, so that green body has certain strength;S5, after wax removal work is completed, carry out soot blowing treatment;S6, white carbon black after wax removal is recycled and sieved to be recycled.The application utilizes the porous structure of white carbon black to provide strong adsorption to completely remove paraffin wax, so that the problem of hole blockage and powder sticking does not occur, so that the green body has good strength, and damage during subsequent transfer and placement is avoided.

The application belongs to the technical field of semiconductor substrates, and particularly relates to a method for removing residual wax on the surface of a gallium arsenide substrate. The method comprises the following steps: introducing a first wax removal composite solvent composed of limonene, dodecane and ethylene glycol butyl ether, a second wax removal composite solvent composed of acetone, isopropyl alcohol and ethyl acetate, and a third wax removal composite solvent composed of isopropyl alcohol and cyclohexane, and using the three kinds of wax removal composite solvents in combination with the process steps of heating and softening, step-by-step ultrasonic treatment and gradient rinsing, so that the effect of removing the residual wax on the gallium arsenide substrate is obviously improved. Thus, the technical problem of the prior art that the effect of removing the residual wax on the gallium arsenide substrate is not good enough is solved.

The present application belongs to the technical field of investment precision casting, and particularly relates to a wax removal structure for improving the quality of a shell and a preparation method of the shell. The present application standardizes the design of the wax removal hole and the matched sealing plug, so that the working surface is a smooth and tight ceramic surface, successfully avoiding the problem of secondary inclusion of the shell cavity caused by the traditional wax removal hole and its sealing mode, and effectively improving the quality of the shell for investment precision casting. The present application effectively solves the problem of uneven end surface of the shell after opening of the traditional wax removal hole part, the uneven adhesion strength of the refractory material, and the problems of aluminum foil ash falling off and rough mixed refractory mud exposure in the traditional repair method, which easily causes secondary inclusion. The preparation method of the present application is simple and easy to operate, reduces the uncertainty caused by operation differences and other factors in the product shell cleaning and sealing operation process, greatly improves the production efficiency of the product shell, and thus achieves the purpose of reducing cost and increasing benefit.