219 results about "Asbestos" patented technology

The utility model discloses an automation line of a single-chain pneumatic tube type bottle silk-screen printing machine, and aims to solve the problems of low automation level, large occupied area and high cost of the conventional silk-screen printing machine. The automatic line comprises a bottle feeding device, a conveying device, a full-automatic printing machine, a baking device, a bottle discharging device, a fan and a control device. The bottle feeding device pushes materials to a lengthened pin chain of the conveying device through a rubber gear and a pushing air cylinder. The conveying equipment adopts a single-chain design, and accurate conveying of materials is achieved through a second air cylinder and a second ratchet wheel; the baking equipment performs low-temperature drying by using an electric heating tube and heat-insulating asbestos; the bottle discharging equipment achieves automatic collection of materials through a bottle discharging baffle with a slope. The control equipment adopts a PLC (Programmable Logic Controller) and a touch screen, so that the printing speed and the baking temperature can be accurately controlled, and production parameters can be displayed in real time. The automatic line adopts pneumatic control, and is simple in structure, low in cost and high in production efficiency.

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.

The invention relates to a method for the remediation and processing of demolition material containing pollutant-containing mineral components, wherein the method comprises the following steps: breaking up the demolition material to separate the pollutant-containing mineral components; dry or wet classifying the broken-up demolition material to separate at least one fraction from it; wet sorting the separated fraction to separate it into a pollutant-free mineral part and a pollutant-containing part, wherein in the wet sorting step the separated fraction is placed in a flowing liquid to separate pollutant-free mineral and pollutant-containing components of the separated fraction according to density, and thus to obtain the pollutant-free mineral part and the pollutant-containing part from the separated fraction.Another aspect of the invention relates to a system for the remediation and processing of demolition material containing pollutant-laden mineral components. These pollutants can include, for example, asbestos or radioactive contaminants.

The brake lining for the railway vehicle comprises a back plate used for being connected with the vehicle, a first groove is formed in the side wall of the back plate, a friction plate made of non-asbestos organic materials is fixedly connected to the side wall of the back plate, the corners of the friction plate are subjected to chamfering treatment, and the first groove is formed in the side wall of the back plate. Scale marks are fixedly connected to the side wall of the friction plate, a cross-shaped groove is formed in the friction plate, the friction plate is arranged, the friction plate is made of non-asbestos organic materials, the friction coefficient of the non-asbestos organic materials is low, aggressiveness to a brake disc is smaller, braking noise can be remarkably reduced, and the service life of the brake disc is prolonged. The friction plate is subjected to straight chamfering treatment, the noise performance under the cold-state working condition can be improved, the cross-shaped groove is formed in the upper end of the friction plate, and the braking noise can be further reduced by increasing the heat dissipation area of the friction face and improving the stability of the friction film through the design of the cross-shaped groove.

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 relates to a fluidized bed furnace distribution plate sealing structure which comprises a furnace shell, a distribution plate, an air bellow, an I-shaped steel beam and an inner supporting plate. A plurality of distribution plates are laid above the I-shaped steel beam above the air bellow; the device further comprises a first welding arc-shaped elastic material plate, a second welding arc-shaped elastic material plate, a bolt, an asbestos pad and a third welding arc-shaped elastic material plate. The structure can prevent the problem of weld crack caused by overlarge temperature difference and prevent leaked air from being blown out from a furnace corner.

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.

The utility model discloses a fan with a local heat preservation structure, which comprises a fan casing and a motor, an output shaft of the motor is connected with an impeller hub of the fan casing, a heat preservation base is arranged on the side face of the fan casing close to the motor, a mounting hole is arranged on the heat preservation base, and the impeller hub is arranged in the mounting hole in a penetrating mode. A plurality of layers of asbestos rubber plates are arranged in the mounting hole, the impeller hub is sleeved with the asbestos rubber plates, the heat preservation base is filled with heat preservation cotton, and the asbestos rubber plates are wrapped with the heat preservation cotton. The utility model has the beneficial effects that the sealing and heat insulation of the joint of the fan casing and the motor are realized, the leakage of hot air in the fan can be prevented, the conduction of heat on the close-range fan casing to the motor can be prevented, the overtemperature of a motor bearing of the motor caused by the leakage of the hot air in the fan is prevented, the motor bearing is prevented from being influenced by the overtemperature, and the service life of the motor is prolonged. The service lives of the motor bearing and the motor are prolonged; the local heat preservation structure is small in size, small in occupied space and convenient to install.

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 invention relates to the technical field of galvanizing, and discloses a high-uniformity hot-dip galvanizing process which comprises the following steps: S1, soaking a workpiece I and a workpiece II in an acid solution; s2, the first workpiece and the second workpiece are washed with water, and the workpieces are washed with clear water; s3, the first workpiece and the second workpiece are immersed in a plating assistant; s4, the first workpiece and the second workpiece are immersed in molten zinc liquid; s5, the first workpiece and the second workpiece are cooled, and after the zinc liquid layers on the surfaces of the first workpiece and the second workpiece are solidified, the galvanized first workpiece and the galvanized second workpiece are checked, trimmed and passivated; s6, asbestos cloth is placed in clean water used for cleaning the first workpiece and the second workpiece, the surface of the asbestos cloth is kept wet, the other surfaces, except for the welding position, of the first workpiece and the second workpiece are covered with the asbestos cloth, the first workpiece and the second workpiece are welded, in the welding process, clean water is continuously poured into the asbestos cloth, and after the humidity of the asbestos cloth is guaranteed, the asbestos cloth is welded; and the spliced galvanized part is obtained.

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.

The present invention relates to a process for converting mineral fibers or a mineral fiber-containing mixture as a starting material into a building material, wherein the starting material is processed in a high-energy mill 50 with a volume of at least 300 l and an energy density of at least 100 kWh / m³ 3 is transformed into a building material through mechano-chemical activation

The invention relates to the field of bright rod preparation, in particular to a bright rod preparation device and method with a crystallizer of a four-layer structure. The bright rod preparation device comprises a fixing frame, a crystallizer body and a shell, the fixing frame is provided with a pouring position and a forming position, the crystallizer body is arranged in the fixing frame and comprises an outer shell, and openings are formed in the top and the bottom of the outer shell; a graphite emulsion-based smooth layer, a ceramic inner pipe and an asbestos heat preservation layer are sequentially arranged in the outer shell from inside to outside, a partition plate is arranged in the graphite emulsion-based smooth layer, and ordered solidification of molten metal from bottom to top is achieved through the selective crystallization function of the crystallizer body, the cooling effect of the cooling assembly on the threaded column and dynamic temperature control of spiral rising of the heating rod. According to the method, the internal dendritic crystal structure and the looseness defect formed in the traditional cast ingot solidification process can be greatly reduced, internal cracks caused by stress concentration in the subsequent forging and hot rolling process are avoided, then the fracture failure of a finished product component is prevented, and the use safety and reliability of the bright rod are remarkably improved.

The utility model provides an asbestos-free temperature-resistant sealing gasket. The non-asbestos temperature-resistant sealing gasket comprises a gasket body, a mounting ring is fixedly connected to the inner surface of the gasket body, a plurality of limiting openings are formed in the inner surface of the mounting ring, a memory alloy wire is arranged in the gasket body, and a bevel edge is arranged on the front face of the gasket body. According to the asbestos-free temperature-resistant sealing gasket, the gasket body can be conveniently installed through the installation ring, the limiting openings are formed in the asbestos-free temperature-resistant sealing gasket, after the gasket body is installed on equipment, limiting pieces on the equipment can be matched with the limiting openings, so that the gasket body is positioned and cannot rotate, the use stability is improved, and the service life of the gasket body is prolonged. And the memory alloy wire is arranged in the gasket body, when the working temperature rises, the local thickness and tightness of the gasket body are automatically and finely adjusted, material shrinkage caused by high temperature is compensated in real time, and it is ensured that sealing is always in the optimal state.

To improve work efficiency in asbestos carrying-out work.SOLUTION: An asbestos carrying-out method, which carries out asbestos from an asbestos removal work area 1a to an external area 4 through a carriage 10, includes: a first cleaning step of roughly removing powder dust adhering to the carriage 10 and to a double packing bag 30, in the asbestos removal work area 1a; a second cleaning step of removing powder dust adhering to the carriage 10 and to the double packing bag 30 by wiping or suctioning the powder dust, in a carriage cleaning area 1b connected to the asbestos removal work area 1a; a first sealing step of sealing an inner bag 32 of the double packing bag 30 installed on the carriage 10, in a first sealing area 2a connected to the carriage cleaning area 1b; a second sealing step of sealing an outer bag 31 of the double packing bag 30 installed on the carriage 10, in a second sealing area 2b connected to the first sealing area 2a; and a third sealing step of sealing a container bag 20 installed on the carriage 10, in a third sealing area 2c connected to the second sealing area 2b and also connected to the external area 4.SELECTED DRAWING: Figure 2

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 invention discloses a rapid installation technology of a nodular cast iron pipe for engineering. The rapid installation technology comprises the steps that firstly, preparation is conducted before construction; 2, pipeline laying; step 3, pipeline connection; step 4, fixing and supporting; 5, acceptance check and backfilling are conducted; according to the method, a DN50 drainage pipe is embedded in a groove in a high water level area to continuously pump water, a ballasting anti-floating pipe is immediately backfilled after a pipeline is in place, a gravel filter layer is laid at the bottom of a buttress, LOCTITE577 sealant is coated in a socket groove in a strong corrosion area, and three layers of polyethylene adhesive tape are wound on the outer wall of the socket groove, so that the engineering quality is greatly improved; the use and operation of materials such as cement and asbestos are avoided, the dust pollution of a construction site and the potential harm to the health of workers are reduced, and the construction safety environment is improved; the flexible connector is easy to detach, convenience is provided for overhauling and replacement of the pipeline or system modification, when leakage occurs, only the sealing ring needs to be replaced or the connector needs to be adjusted generally, and the repairing speed is high.