123 results about "Asbestos" patented technology

This invention belongs to the field of iron and steel smelting technology, and particularly relates to a protective device and manufacturing method for a converter movable fume hood lifting lug. It includes lifting lugs and a movable fume hood. The lifting lugs are welded to the movable fume hood. A protective cover with an internal interlayer, matching the outer contour of the lifting lug, is hung on the outside of the lifting lug. The two sides of the interlayer of the protective cover are connected by ribs. Several V-shaped anchoring nails are welded to the interlayer wall of the protective cover. Refractory grout is filled into the interlayer of the protective cover. Asbestos is laid between the protective cover and the lifting lug. One end of the protective cover is welded to the movable fume hood. Several round rod hanging lugs are welded to both sides of the protective cover, and the upper ends of the round rod hanging lugs are hung on the lifting lugs. This invention isolates the lifting lug from the heat source through the protective cover, preventing the lifting lug from being burned. While the protective cover is fixed to the lifting lug and the movable fume hood, it reduces the contact area, thereby reducing heat transfer.

It is provided a process for extracting nickel sulfate from mining ores, such as serpentine, comprising the steps of conducting a magnetic separation of the mining ores producing a magnetic fraction and a non magnetic fraction; leaching the non magnetic fraction with HCI producing a slurry comprising metals chloride; filtrating the slurry producing a metals chloride liquor; purifying the metals chloride liquor producing a magnesium chloride solution; separating an iron-nickel cake from the magnesium chloride solution; leaching the cake together with the magnetic fraction producing a metallic sulfate solution; extracting nickel and cobalt from the metallic sulfate solution by a ion exchange resin extraction and stripping producing an inorganic stripped phase; submitting the inorganic stripped phase to a liquid-liquid extraction producing a nickel concentrated phase; and evaporating and drying the nickel concentrated phase to recuperate nickel sulfate.

The application discloses a casting process for a large four-cylinder diesel engine cylinder cover, which comprises the following steps: S1, core making; S2, sand core assembling; S3, pouring; and S4, mold opening. In the core making process, each sand core part is perforated, so that the sand amount is reduced, the hollowing process is realized, the overall weight of the sand core is reduced, the gas emission amount during the combustion of the sand core in the pouring process is reduced, and the gas discharge is facilitated; meanwhile, a coating and an asbestos pad are coated on the surface of each sand core, one-way gas discharge is realized, the exhaust passage is effectively prevented from being infiltrated with molten iron and losing effectiveness, and the pouring quality is ensured.

Conventional removal tools have difficulty completely removing asbestos-containing adhesive layers, especially those that exist under thin paint or flooring materials. The cutting edge tends to slip on the surface of the adhesive layer, and additional sanding work is required with a sander to remove any remaining adhesive layer, resulting in poor work efficiency. [Solution] In this peeling tool, which is attached to a handheld electric impact device, the flat blade base, consisting of the base end side of the joining notch and the front side of the flat blade, is made of die steel, and the cutting edge is made of high-speed steel, allowing the cutting edge to penetrate into the concrete surface even in thin adhesive layers, enabling efficient and reliable peeling and removal of the adhesive layer. Setting the inclination angle of the cutting edge to 15° to 45° enables even more effective removal.

Systems, methods, and other embodiments for removing contaminated materials such as asbestos from railcars (i.e., train cars and subway cars) for subsequent recycling of the railcars. In particular, a collapsible inner containment structure having a HEPA negative air pressure is used. A door on the inner containment structure is opened at one end of the inner containment structure and a railcar is transported into a work area located within the inner containment structure. The door is then closed so that the inner containment structure can maintain the negative pressure within the inner containment structure. The contaminated materials such as asbestos are removed from the inside of the railcar using a mixture of pressurized water and media.

The utility model discloses a high-altitude melting furnace, which relates to the technical field of glass production, the high-altitude melting furnace is used for high-altitude glass production, the high-altitude melting furnace comprises a melting part, a clarifying part and a forming part, the melting part is used for melting glass raw materials into glass liquid; the clarification part is connected to the melting part and is provided with a clarification runner, the clarification runner is used for clarifying molten glass, and the tank wall of the clarification part is respectively provided with an electric smelting zirconia corundum brick, a clay brick and an asbestos-free calcium silicate board from one end close to the clarification runner to one end far away from the clarification runner; the forming part is connected to the clarifying part and is provided with a forming runner, the forming runner is used for converting liquid glass liquid into plastic glass liquid, a neck is arranged between the forming part and the clarifying part, and the neck is provided with a neck water bag which can be inserted into the glass liquid and is adjustable in depth. The technical scheme provided by the utility model aims to improve the glass production qualification rate and quality of the melting furnace in high-altitude areas.

The invention belongs to the technical field of road buried glass fiber reinforced plastic mortar pipe culvert construction, and particularly relates to a solid waste resourceful treatment method for double-row glass fiber reinforced plastic mortar pipe construction, which comprises the following steps of: vertically excavating a foundation pit, supporting by using Larsen U-shaped steel sheet piles, compacting a base, and replacing and filling undesirable soil with natural gravel soil. After the base is accepted and accepted, an inverted filter layer is laid, and gravels of 20 cm are laid. Reinforced concrete end and middle prefabricated blocks are prefabricated in a factory, and asbestos cushion layers are attached into the prefabricated blocks. And the elevation and the axis of the pipe culvert are accurately measured, a temporary weight is arranged in the pipe culvert to prevent floating, the double-row glass fiber reinforced plastic sand inclusion pipe culvert is hoisted in place, and cushion layer attachment is checked. The method comprises the following steps: mixing and pouring mixed slurry consisting of solid waste ash and quick-hardening cement by using special equipment, backfilling the mixed slurry until the elevation of an excavated pavement is below 30cm, then backfilling slag to the excavated surface of the roadbed, and compacting by using a light road roller. And entering a curing period after compaction. According to the method, solid waste resource utilization with the liquid fly ash and the furnace slag as the core is achieved, and the construction efficiency is remarkably improved.

The invention relates to the field of thermal battery manufacturing, and discloses automatic punching equipment and method for an asbestos ring for a thermal battery. The equipment comprises a rack, a movable platform, a punching mechanism and a ring collecting mechanism. The moving platform is driven by a servo motor to achieve accurate positioning and pressing of asbestos paper. The punching mechanism drives an inner cutting die and an outer cutting die which are coaxially arranged through an impact air cylinder to complete punching. During demolding, the jacking driving mechanism drives the inner cutting die to eject out the ring piece, the outer diameter of the asbestos ring is larger than the caliber of the outer cutting die through the elasticity of the asbestos ring, and therefore the asbestos ring automatically falls off and is collected through the ring collecting device. The full-process automatic production is realized, the problems of low manual punching efficiency and poor product consistency are solved, and the production efficiency and the product quality are remarkably improved.

The invention belongs to the technical field of building materials, and particularly relates to high-performance CFB ash clinker-free cement and a preparation method thereof. The high-performance CFB ash clinker-free cement provided by the invention is prepared from the following raw materials: a base material (CFB fly ash, ground CFB slag, S95 mineral powder, silica fume and desulfurized gypsum) and a composite modifier (calcium chloride, a polycarboxylate superplasticizer, aluminum sulfate, propyl p-hydroxybenzoate, nano silicon dioxide, nano calcium oxide, chrysotile nanofiber and hydrated magnesium silicate nanofiber). The high-performance CFB ash clinker-free cement provided by the invention does not contain clinker, does not need calcination treatment, has the advantages of early strength, high strength, micro-expansion and good durability, and also has the characteristics of prevention and reduction of cracking, greenness, energy conservation, environmental protection, high solid waste dosage utilization, low production cost and long service life.

The invention discloses an automatic forming hydraulic machine for asbestos-free friction plate production, and relates to the technical field of asbestos-free friction plates, the automatic forming hydraulic machine comprises a base, a vertical cylinder is vertically arranged on the upper portion of the base, a rotating disc is rotatably arranged outside the vertical cylinder, and a plurality of mold cavities are formed in the position, close to the edge, of the upper portion of the rotating disc in an annular matrix mode; a bottom plate is longitudinally and slidably arranged in the mold cavity, a moving ring is longitudinally and slidably arranged at the position, above the rotating disc, of the outer portion of the vertical barrel in a sleeving mode, and a hydraulic cylinder is installed at the top of the vertical barrel. According to the automatic forming hydraulic machine for production of the asbestos-free friction plate, the servo motor drives the gear transmission system to drive the rotating disc to achieve periodic rotation, and automatic filling of raw materials can be continuously and accurately completed in combination with cooperation of the charging barrel and the mold cavity. In the rotating process of the rotating disc, the mold cavities sequentially pass through the feeding station, the pressing station and the demolding station, and through cooperative control of the hydraulic system and the material pushing mechanism, the downward pressing forming action and the material pushing ejection action of the upper mold head form coherent connection.

The application discloses a combined high-g-value half-sine shock waveform generator and method, which comprises a gas storage tank, a launching cylinder, a combined waveform generator and a shock piston. A quick release device is arranged in the gas storage tank to instantaneously release compressed gas, and the compressed gas pushes the shock piston to move linearly along the launching cylinder at an acceleration. The shock piston collides with the combined waveform generator, an acceleration sensor on the shock piston records the acceleration signal of the shock process, and reflects the shock waveform experienced by the test piece. The combined waveform generator is composed of three material media of fiber non-woven fabric, polyurethane and asbestos. By changing the proportion of the three material media, the problem of strong nonlinearity of a single material medium can be corrected, and a high-g-value half-sine shock waveform complete in waveform and meeting a standard tolerance band can be obtained under high-speed impact. The application solves the problem of nonlinear mechanical behavior of a single material medium under high overload impact, and obtains a half-sine waveform meeting the standard tolerance band.

The utility model discloses a high heat-resistant engine suspension structure, which relates to the technical field of automobile parts and comprises a structure main body, a heat insulation gasket and a heat insulation sleeve, a second mounting bracket is mounted at the top end of the structure main body, and a first mounting bracket is mounted on one side of the structure main body. Heat insulation gaskets are arranged above the second mounting bracket and on one side of the first mounting bracket, insertion holes are formed in the front ends and the rear ends of the heat insulation gaskets, fixing springs are mounted at the front ends and the rear ends of the first mounting bracket and the second mounting bracket, and limiting plates are mounted at one ends of the fixing springs. Through the heat insulation sleeve with the air heat insulation cavity inside, external heat is isolated from the structure body by means of low heat conductivity of air, the heat is further blocked through the heat insulation gasket made of asbestos, glass fiber and other materials, and a heat transfer path is effectively blocked.

The utility model provides a preheater flap valve shaft hole sealing device which is characterized by comprising a flap valve outer shell, a protective shell welded to a shaft hole of the flap valve outer shell, a shaft rod and a sealing assembly. The gap between the protective shell and the shaft rod is larger than the gap between the shaft hole of the original shell; the sealing assembly comprises three graphite packings with the thickness of 12 mm, the space between the protective shell and the shaft rod is sequentially filled with the graphite packings, and the graphite packings are limited and fixed through an end face baffle. The baffle is pressed tightly through screws and nuts which are evenly distributed on the periphery of the baffle, and adjustable sealing press fit is achieved. Compared with a traditional single-layer 3mm asbestos plate sealing structure, the sealing service life is prolonged by more than three times by enlarging the space of the sealing cavity and arranging multiple layers of graphite packing, meanwhile, the gap between the baffle and the shaft rod is reduced, and the problem of air leakage at the shaft end is effectively solved. The device is simple in structure and particularly suitable for long-term stable sealing of the shaft end of the flap valve under the high-temperature working condition.

An asbestos free friction material composition and associated brake pad for vehicles including inorganic and / or organic and / or metallic fibers, at least a binder, at least a friction modifier or lubricant, at least a filler or abrasive and at least a soluble salt of barium and / or calcium and / or aluminum and / or silver with percentage between 0.5-10% by weight. Among them barium carbonate, calcium hydroxide, aluminum triacetate and silver acetate are preferably.

An air sampling pump is disclosed, including a housing to contain a pump, a battery, and a switch. The switch controls a regulator to control the speed of the pump. A coupler is positioned on an exterior surface of the housing. The coupler releasably connects a hose to the housing, wherein the hose is in fluid communication with the pump to enable the pump to draw air through at least one cassette positioned at an opening at an end of the hose. The cassette collects an air sample to enable the analysis of the air sample for which can be used to measure air contaminants such as asbestos, lead, and mold.

The utility model relates to the technical field of hoses, in particular to a wear-resistant metal hose assembly which comprises a metal corrugated pipe, a metal woven mesh sleeve is arranged on the outer side of the metal corrugated pipe, a protective layer is arranged between the metal woven mesh sleeve and the metal corrugated pipe, and the protective layer is composed of an outer layer and an inner layer. The outer layer is an aramid fiber woven layer, the inner layer is a spirally wound stainless steel band layer, and an alkali-free glass fiber layer is arranged between the metal woven mesh sleeve and the protective layer. Friction between the metal woven mesh sleeve and the protective layer and the alkali-free glass fiber layer filled between the metal woven mesh sleeve and the protective layer can be effectively reduced, the overall strength of the pipe body is further enhanced, and good shockproof and buffering performance is achieved through the metal corrugated pipe, the protective layer and the asbestos layer filled between the metal corrugated pipe and the protective layer. Local collision friction between the metal corrugated pipe and the protective layer is effectively reduced, and the fatigue resistance of the metal corrugated pipe is improved.

This utility model discloses a crescent lock forming casting mold, belonging to the field of casting mold technology. It solves the problem that the asbestos rope in the groove of the existing device cannot effectively isolate the outside air, which easily leads to the entry of outside air into the forming zone, thereby affecting the quality of the casting, and making it inconvenient to observe whether the molten metal will fill the forming zone. It includes a lower mold and an upper mold. The forming zone is opened in the middle of the top surface of the lower mold. A rectangular groove is opened on the top surface of the lower mold. A rectangular rubber pad is fixedly installed on the bottom surface of the rectangular groove. An overflow hole is opened on the side of the top surface of the upper mold away from the pouring hole. By inserting the rectangular protrusion into the inside of the rectangular groove, the entry of outside air into the interior of the forming zone can be avoided, thus avoiding the influence of the external environment on the casting inside the forming zone. After the molten metal fills the interior of the forming zone, the excess molten metal will overflow through the overflow hole, achieving the purpose of making it easy to observe whether the molten metal has filled the forming zone.

This invention discloses a method for controlling porosity and shrinkage cavities in large-size equiaxed crystal high-temperature alloy castings, belonging to the field of investment casting technology. The method includes: (1) wrapping the large-size casting shell with asbestos, then placing the asbestos-wrapped shell into a sand box, wherein the sand box is modified according to the asbestos-wrapping molding process of the casting; (2) smoothly loading the sand box containing the shell into a muffle furnace for shell pre-firing; (3) using a shell transfer cart to transfer the shell to the ingot mold chamber of a vacuum smelting equipment for smelting, and then casting to obtain a large-size equiaxed crystal high-temperature alloy casting. This method reduces or eliminates the tendency to form porosity and shrinkage cavities by controlling the temperature field of the sand box and the shell transfer time.

The application discloses a model glue for making a three-dimensional copper relief by forging and a preparation method of the model glue. The preparation method of the model glue is as follows: taking 3-5 parts of paraffin, 2-3 parts of butadiene rubber and 2-3 parts of aluminum silicate fiber as raw materials according to mass fraction; first, 2.2-3.5 parts of paraffin are put into a first working cavity of a mud refining machine and are refined and pressed into flaky particles, and then the flaky particles are put into a second working cavity of the mud refining machine; then, 1.8-2.2 parts of butadiene rubber are put into the second working cavity of the mud refining machine and are refined and kneaded together with the paraffin into a soft paste; after that, 1.8-2.2 parts of aluminum silicate fiber are added into the paste and are refined and kneaded together with the paste until the aluminum silicate fiber is evenly distributed in the asbestos mixed paste; after that, the remaining paraffin, the remaining aluminum silicate fiber and the remaining butadiene rubber are sequentially added into the asbestos mixed paste and are refined and kneaded, and then the model glue is obtained. The model glue has stronger deformation and stretching performance, has a wider use range without any additional conditions, does not need to be heated when being repeatedly used, and has incomparable beneficial effects compared with the prior art.

The utility model relates to a combined high -power electromagnetic induction heating device and use method thereof, and relates to electromagnetic induction heating equipment technical field, and its structure includes power supply, electric control cabinet, induction heating assembly and temperature sensor. Electric control cabinet includes a plurality of electric control unit, and induction heating assembly includes a plurality of groups of induction coil, and the number of induction coil is consistent with the number of electric control unit and one -to -one correspondence, and temperature sensor is established on the heated work piece. Its use method includes: 1, fix the work piece to be heated and cover asbestos cloth;2, the induction coil and temperature sensor are arranged on the work piece;3, temperature sensor is connected to electric control cabinet, and induction coil is connected with corresponding electric control unit and is connected to power supply;4, start heating until reaching preset temperature;5, remove induction coil and temperature sensor. Application of the utility model can solve the technical problem of the prior art village present electromagnetic induction line arrangement complicated, easy to damage, high maintenance cost, and equipment volume is big, and the poor convenience.

The utility model relates to the technical field of VOCs (volatile organic compounds) detection, in particular to a lightweight VOCs gas chromatograph detection device which comprises ventilation windows fixedly mounted on the left side and the right side of a gas chromatograph body, a fixing frame is fixedly mounted on the left side of the gas chromatograph body, and a filter cartridge is mounted on the inner side of the fixing frame. A filter screen for treating dust is arranged on the inner side of the filter cartridge, and caustic soda asbestos for treating water and carbon dioxide is arranged on the inner side of the filter cartridge. When gas is detected by utilizing a gas chromatography method, dust in introduced gas can be filtered out through the filter screen arranged in the filter cartridge, and moisture and carbon dioxide in the gas are treated in cooperation with caustic soda asbestos arranged in the filter cartridge; according to the gas chromatograph, the to-be-detected gas sample is pretreated when the detected sample gas is introduced into a system in the gas chromatograph body for detection, and the deviation of detection data can be reduced by pretreating moisture, carbon dioxide and dust in the sample gas.

The utility model belongs to the technical field of metal material preparation and processing, and particularly provides a die for a non-vacuum up-drawing continuous casting production process of a copper-chromium-zirconium alloy rod material, which specifically comprises a graphite die, an embedded ceramic tube and a graphite baffle, an embedded ceramic tube is arranged in the graphite mold; and a graphite baffle is arranged on the outer side of the lower part of the graphite mold. And an asbestos layer is arranged between the outer part of the graphite mold and the graphite baffle. The graphite baffle is internally provided with threads and is in threaded connection with the outer surface of the graphite mold. The die for the non-vacuum up-drawing continuous casting production process of the copper-chromium-zirconium alloy rod material has the beneficial effects that the embedded ceramic tube material can be selected according to different Cr contents, so that the reaction of Cr and C is prevented, and a graphite die can be prevented from becoming rough due to surface reaction in the pull casting process. And component homogenization is realized in a continuous material supplementing form. In addition, by combining optimized process parameters, the surface quality of the continuous casting rod material is bright, and continuous and stable operation of the upward continuous casting process is achieved.

The utility model relates to the technical field of spontaneous combustion temperature testers, and discloses a spontaneous combustion temperature tester which comprises a beaker, a support with the bottom extending to the inner side of the beaker is connected to the top of the beaker in a clamped mode, an asbestosed wire gauze located on the inner side of the beaker is placed on the inner side of the support, and an electric bakelite cover plate located above the support is buckled to the top of the beaker. A heat insulation assembly in contact with the outer side of the beaker is arranged at the bottom of the bakelite cover plate; the heat insulation assembly comprises four limiting rods, and the four limiting rods are all in threaded connection to the bottom of the bakelite cover plate and are annularly distributed at equal intervals. The spontaneous combustion temperature tester has the advantages that the heat concentration capacity is high, sample measurement is not interfered by related devices, energy is saved and the like, and solves the problems that a beaker is a glass product, the heat transfer capacity is high, most heat can be dissipated into air by the beaker in the heating process, the heating efficiency of a detection sample on an asbestosed wire gauze is low, and the like. Therefore, the problems that a test sample is heated unevenly, and more energy is consumed in the experiment process are solved.

A high-temperature-resistant heat dissipation type pure resistive load device for testing comprises a pure resistive resistor, the pure resistive resistor is connected with a cooling fin, the cooling fin is connected with a first bottom heat insulation asbestos plate, and the two sides of the bottom heat insulation asbestos plate are provided with a first heat insulation asbestos plate and a second heat insulation asbestos plate respectively. According to the high-temperature-resistant heat dissipation type pure resistive load device for testing, current meeting the requirement can be provided for an electric energy meter through a pure resistive resistor, good heat dissipation is carried out for the electric energy meter by additionally arranging aluminum alloy cooling fins and a direct-current fan, and the high-temperature-resistant heat dissipation type pure resistive load device for testing can be used for testing the high-temperature-resistant heat dissipation type pure resistive load device for testing. The heat insulation asbestos board can isolate heat of the load device from being conducted to the ground of a laboratory, a battery-powered direct-current fan heat dissipation mode is adopted, electromagnetic radiation generated by the load can be reduced to the minimum, and normal testing of the electric energy meter is not affected.

The utility model discloses a kind of high-pressure wind grid transmission roller devices for photovoltaic glass toughening, including high-pressure wind grid roller way, high-pressure wind grid roller way is installed in high-pressure wind grid;With conveying direction as by front to back, high-pressure wind grid roller way is divided into the heat-resistant roller way area of front part and the conventional roller way area of rear part, heat-resistant roller way area is made of several high heat resistance rollers, high heat resistance roller is winding asbestos rope roller, conventional roller way area is made of several winding aramid rope roller. Through the application of the utility model, when photovoltaic glass is heated by electric heating furnace and enters high-pressure wind grid, first contact the winding asbestos rope roller of heat-resistant roller way area, it is full winding asbestos rope, with more durable heat resistance, can greatly improve the overall average life of high-pressure wind grid roller way. And the installation quantity of winding asbestos rope roller is controlled to not more than three, that is, the life of high-pressure wind grid roller way can be effectively improved, and the asbestos dust evaporation amount of asbestos rope can be guaranteed.

This invention discloses a sealing sleeve and its sealing method for the gap between the ingot head and the crystallizer in continuous casting, belonging to the technical field of continuous metal casting. The sealing sleeve is formed by pressing refractory material and is circumferentially spliced ​​from two or four sealing blocks with inverted tapers. The inner side of each sealing block has a positioning protrusion that mates with the groove of the ingot head. An elastic expansion ring with a V-shaped or U-shaped cross-section is integrally formed on the outer sealing surface. The radial protrusion height is not less than 1.2 times the maximum gap between the sealing sleeve and the crystallizer. The sealing blocks are joined by mortise and tenon joints, and the joints are coated with a high-temperature adhesive. During installation, each sealing block is sequentially inserted into the lower opening of the crystallizer and pressed together. The positioning protrusion engages with the groove of the ingot head, and the elastic expansion ring is compressed to form an initial interference seal. After casting begins, high-temperature sintering and solidification form a dense sealing layer. This invention completely replaces asbestos materials, requires no hammering during installation, does not damage the copper plate, adapts to gap manufacturing errors, reduces casting preparation time by more than 80%, and lowers the steel leakage rate.

The utility model discloses a high-temperature-resistant ductile coke grid tail dust hood sealing device, which relates to the technical field of environment-friendly sealing auxiliary equipment and comprises an adjusting base, the adjusting base is a high-temperature-resistant fire-retardant sleeve, an inner cavity of the high-temperature-resistant fire-retardant sleeve is filled with asbestos ceramic fibers to form a high-temperature-resistant layer, and a plurality of connecting holes are formed in the high-temperature-resistant fire-retardant sleeve; the two sides of the front face of the adjusting base in the length direction of the adjusting base are connected with connecting plates in a pressed mode respectively, the cross section of each connecting plate is in an L shape, and the length of each connecting plate is equal to that of the high-temperature-resistant fire-retardant sleeve. The connecting plates are provided with a plurality of connecting holes corresponding to the connecting holes in the high-temperature-resistant fire-retardant sleeve in position. Compared with the prior art, a gap between a movable part at the tail part of a coke grid and a dust hood is flexibly sealed, the sealing performance is effectively improved, the dust hood is prevented from being blocked, the dust hood is prevented from being blocked, the dust hood is prevented from being blocked, and the service life of the dust hood is prolonged. Therefore, dissipation of smoke and coke powder is isolated, and the phenomenon of smoke and fire of the coke oven is reduced.

The present application relates to the field of vacuum furnace body knotting manufacturing, in particular to a vacuum smelting furnace body device and a knotting method thereof. The device comprises a plurality of copper wire groups, which are laid between a tire membrane (2) and an asbestos cloth (4) and close to the inner side of the asbestos cloth (4) at intervals. The copper wire group comprises a plurality of first copper wires and a plurality of second copper wires (6), and the second copper wires (6) are arranged in a staggered and buckled manner with the first copper wires (7) embedded in the lower layer. The use of the method of the present application overcomes the defects of low bonding strength and easy crack formation at the connecting parts between the main induction zone and the furnace ring, and between the furnace ring and the furnace nozzle of the existing furnace body, enhances the connection integrity and firmness between the main induction zone and the furnace ring, and between the furnace ring and the furnace nozzle, reduces the occurrence of large transverse and longitudinal crack defects, improves the service life and production efficiency of the vacuum furnace body, reduces the knotting frequency of the furnace body under the same production condition, and reduces the labor intensity of personnel.

The utility model discloses a kind of feed equipment for asbestos tile production, including tank, the upper portion of tank is equipped with stirring mechanism, the upper surface of tank is fixedly connected with four feed pipes, the outer surface of four The feed pipe is fixedly connected with electric gate valve, the top of four The feed pipe is fixedly connected with storage barrel. The device is rotated by the four reduction motors synchronously driven four rotating rods and four spiral conveying blades set, simultaneously using the cooperation of electric gate valve and PLC controller, then different raw materials in four storage barrels can be pushed, and the opening of electric gate valve and the rotating speed of four reduction motors are adjusted, the conveying amount of each raw material is controlled, multiple raw materials are synchronized and supplied in proportion, avoid the proportion deviation of artificial batching or single conveying, using the setting of stirring mechanism, so that multiple raw materials can be pretreated and stirred, break the raw material agglomeration, improve dispersibility and the uniformity of subsequent mixing.