191results about "Monolithic linings" patented technology

The invention relates to the field of furnace lining materials, in particular to a rapid repairing material for a tapping hole and a furnace lining of an intermediate frequency furnace. The rapid repairing material comprises the following components in parts by weight: 50-70 parts of tabular corundum, 10-20 parts of fused magnesite, 8-15 parts of alumina micro powder, 3-8 parts of nano zirconia, 5-12 parts of silicon carbide, 10-15 parts of silica sol and 2-5 parts of a reinforcing agent. Wherein the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride. The tabular corundum is mainly used as an integral framework; the fused magnesite is matched with the alumina micro powder to form magnesium aluminate spinel with a high melting point; the nano zirconium oxide can fill pores and is excellent in toughness; the silicon carbide has the advantages of high hardness, high thermal conductivity and high melting point; the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride, although the adding amount is small, the high-temperature strength, toughness and thermal shock resistance of the repairing material can be remarkably improved, and especially the long-term corrosion resistance can be remarkably improved.

The invention relates to the technical field of molten salt chlorination furnaces, in particular to a furnace lining structure and method capable of achieving furnace temperature control and waste heat utilization of a molten salt chlorination furnace, and the furnace lining structure sequentially comprises a metal furnace shell, a heat insulation basalt plate layer, an anthracene oil graphite sealing layer, a first refractory clay brick layer, a phosphate pouring material layer and a second refractory clay brick layer from outside to inside. And a corrosion-resistant metal conduit is pre-buried in the phosphate castable layer. According to the furnace lining structure and method capable of achieving furnace temperature control and waste heat utilization of the fused salt chlorination furnace, the corrosion-resistant metal guide pipe is pre-buried in the phosphate pouring material layer, coarse TiCl4 clear liquid is utilized to circularly absorb heat in the guide pipe, and linkage control of the temperature sensor and the flow adjusting valve is combined, so that the temperature in the fused salt chlorination furnace can be accurately adjusted in real time. And compared with a traditional cooling mode of back spraying of high-solid-content materials, the problem that the gas amount in the furnace is suddenly increased due to spraying evaporation is solved, and the stability of the negative pressure in the furnace is effectively guaranteed.

The lime kiln lining structure comprises a kiln top lining and a kiln body lining, and the kiln body lining comprises a first refractory brick layer, a second refractory brick layer, a first heat insulation layer, a second heat insulation layer and a third heat insulation layer which are sequentially arranged from inside to outside. Contact surfaces between two adjacent bricks in the first refractory brick layer are in concave-convex fit and are in sealed connection; the strength of the kiln top lining is higher than that of the first refractory brick layer, the second refractory brick layer, the first heat insulation layer, the second heat insulation layer and the third heat insulation layer, and the kiln top lining extends downwards to form a reinforcing part; kiln protecting plates are arranged on the inner side face of the kiln top lining and the upper side surface of the side, away from the second refractory brick layer, of the first refractory brick layer. The stability of the lime kiln lining can be enhanced, and the service life of the lime kiln can be prolonged; meanwhile, the heat preservation performance of the lime kiln can be enhanced, and heat loss is reduced.

The invention relates to the technical field of crystalline silicon growth equipment, and provides a composite heat preservation cover for a crystalline silicon growth reduction furnace and a preparation method, the composite heat preservation cover comprises a heat insulation layer and a function protection lining, and the heat insulation layer is arranged on the outer side of the function protection lining; the heat insulation layer is made of a high-purity fiber heat insulation material or a ceramic fiber heat insulation material, the metal impurity content of the heat insulation layer is smaller than 100 ppm, and the heat conductivity coefficient is smaller than or equal to 0.1 W / (m.K); the function protection lining is made of a high-purity and high-density carbon-ceramic composite material, and the metal impurity content of the high-purity and high-density carbon-ceramic composite material is smaller than or equal to 200 ppm; or the functional protection lining is made of a carbon-carbon composite material, and a silicon carbide coating and / or a silicon nitride coating are / is arranged on the surface of the functional protection lining. The high-purity and high-density carbon-ceramic composite material lining is compounded with the efficient thermal insulation material, so that high-speed gas scouring protection, corrosive atmosphere blocking and accurate axial heat flow regulation and control are synchronously realized. Compared with a traditional structure, the power consumption of the structure is reduced by more than 20%, and the service life reaches more than 6 months.

The utility model relates to the technical field of heat insulation devices, and discloses a heat insulation device applied to an oil refining chemical heating furnace, which comprises a heating furnace body, four protective layers are arranged on the outer wall of the heating furnace body, the four protective layers are connected through plug-in assemblies, two outer shells are arranged on the outer walls of the four protective layers, and the plug-in assemblies are arranged on the outer shells. The front sides of the two outer shells are connected through two locking assemblies, the protection layer comprises a flame-retardant layer located on the outer wall of the heating furnace body, and a heat insulation layer is arranged on the outer wall of the flame-retardant layer. According to the heat insulation device, the protective layer, the waterproof layer, the heat insulation layer and the flame-retardant layer are matched through the inserting grooves and the inserting blocks, the other protective layer, the other waterproof layer, the other heat insulation layer and the other flame-retardant layer can be conveniently assembled, and finally the two outer shells are matched through the locking shafts and the locking blocks, so that the heat insulation device is convenient to maintain and replace; and meanwhile, the heating furnace can be better subjected to heat insulation through a protective layer, a waterproof layer, a heat insulation layer and a flame-retardant layer.

A novel furnace door heating apparatus and a horizontal sintering furnace thereof are provided. The novel furnace door heating apparatus includes: a main heating body, the main heating body includes a first main heating body, a second main heating body, and a third main heating body, the first main heating body and the second main heating body are arranged opposite to each other in the X-axis direction, and the third main heating body is arranged at a bottom position of the first main heating body and the second main heating body in the Z-axis direction; and auxiliary heating bodies, the auxiliary heating bodies are arranged in two end regions of the main heating body in the Y-axis direction, and both are arranged adjacent to the main heating body. The two end regions of the main heating body in the Y-axis direction are provided with the auxiliary heating bodies.

The invention belongs to the technical field of smelting furnaces, and discloses an energy-saving metallurgical smelting furnace based on intelligent control and a using method thereof, and the smelting furnace comprises a furnace body, a furnace lining, a top cover and a monitoring mechanism; a furnace lining is arranged on the inner side of the furnace body; a top cover is detachably arranged on the furnace body; a plurality of hydraulic rods are fixedly arranged on the top plate; the lower ends of the hydraulic movable rods are fixedly connected with the top cover; a combustor is fixedly arranged on one side of the furnace body; a combustion improver pipe and a combustion agent pipe are arranged on the combustor; two annular pipes are fixedly arranged on the furnace body, and a plurality of connecting pipes are uniformly distributed on the annular pipes; a plurality of burners are arranged on the inner wall of the furnace lining; and a monitoring mechanism is arranged on the furnace body. Key parameters such as temperature and energy consumption in the smelting process are monitored in real time through the intelligent system, energy input and smelting requirements are dynamically matched, and energy waste is avoided; the production efficiency is improved; the product quality is stabilized; the intelligent system can monitor the running state of equipment in real time, reduce the risk of safety accidents and guarantee the safety of personnel and equipment.

The invention discloses prefabricated furnace lining modules, a modular fast-assembly type furnace lining system and a furnace lining installation method.According to the structural form of a furnace lining of a heating furnace, the modular structure of the furnace lining is decomposed into a furnace top module, a furnace wall module and a furnace door module correspondingly, and each prefabricated furnace lining module integrates a refractory layer, a heat insulation layer, an anchoring part and a connecting mechanism; the structural strength and the heat insulation performance are strictly inspected; each module is prefabricated and formed in a factory, during installation, only simple hoisting, positioning, splicing and locking are needed, installation of the furnace lining is rapidly completed like building blocks, the built splicing seams are filled with fireproof sealing materials, and the sealing performance and integrity of the seams are guaranteed. When the prefabricated furnace lining module is used for on-site furnace lining installation, the construction period can be shortened, the construction difficulty can be reduced, the uniformity of the construction quality can be guaranteed, after the furnace lining is damaged, only the damaged module needs to be dismantled and replaced with a new module, maintenance is easy, and the maintenance cost can be greatly reduced.

The present invention discloses a method for constructing a refractory material structure of a lining support pillar of a double-chamber kiln, including constructing a refractory material structure of a lining support pillar of a double-chamber kiln; the construction process includes: for the odd layers in the ring brick layer, a heat-insulating brick close to the casting material around the pillar is horizontally longitudinally constructed and the side is close to the steel shell for construction, and a refractory brick is horizontally longitudinally constructed on the side of this heat-insulating brick facing the furnace interior, and a part of this refractory brick is longitudinally inserted into the position of the casting material; for the even layers in the ring brick layer and the upper and lower layers of the pillar, a heat-insulating brick on an outer C-lining adjacent to the inner C-lining is horizontally longitudinally constructed and the side is close to the steel shell for construction, and a refractory brick is horizontally longitudinally constructed on the side of this heat-insulating brick facing the furnace interior, and the end faces of this heat-insulating brick and this refractory brick are flush for construction and both are partially inserted into the connection between the inner C-lining and the outer C-lining. The present invention can solve the problem that the pillars and refractory materials of the double-chamber kiln are prone to cracking to generate straight seams and damage the furnace wall.

The present invention provides a pouring material for a firing furnace, the pouring material being capable of suppressing physical impacts from in-furnace objects, and also suppressing alkali attack without requiring a drying step after pouring construction. A pouring material for a firing furnace according to the present invention contains: 75 mass% or more in total amount of at least one among an alumina raw material, an alumina-silica raw material, or a silicon carbide raw material; 1 mass% to 15 mass% of silica flour. The pouring material is obtained by adding colloidal silica as a SiO2 component at an addition rate of 0.5 mass% to 5 mass% to a refractory raw material mixture in which the CaO component content derived from alumina cement is 0.5 mass% or less (including zero).

A method of repairing or replacing a roof of a coke oven battery in operation, said coke oven battery including a number of parallel coking chambers separated by heating walls and delimited on top by a ceiling, itself covered by a roof, the roof having for each coking chamber a number of charging holes or gas transfer holes above the coking chamber, a number of inspection holes above the separating heating walls, one or two base rings connected to one or two gas collecting mains and rail sleepers supporting rails for a coke charging car or charging gas transfer car through an ascension pipe. A kit of parts with construction modules and the use of such kit of parts in the repairing or replacing of a roof of a coke oven battery in operation and or with at least one oven empty in hot condition is also related.

The utility model provides a single crystal furnace main furnace chamber and a single crystal furnace provided with the main furnace chamber, the single crystal furnace main furnace chamber comprises a cylindrical furnace body, the cylindrical furnace body comprises an outer wall and an inner wall, a vacuum cavity is arranged between the outer wall and the inner wall, and a first thermal insulation layer is arranged in the vacuum cavity. The single crystal furnace has the beneficial effects that the vacuum cavity and the heat preservation layer are arranged, so that heat preservation and heat insulation of the main furnace chamber are realized, the heat preservation effect is ensured, the heat loss is reduced, the power consumption of the single crystal furnace is reduced, and the single crystal drawing quality can be improved.

A rotary kiln inner tank limiting structure comprises a frame and an inner tank, a first belt and a second belt are installed on the inner tank, the first belt is located at the feed port side, a narrow support wheel and a wide support wheel are installed on the upper part of the frame, the first belt and the narrow support wheel cooperate and the axial position remains unchanged; the second belt cooperates with the wide puller; a feed cover and a first sealing module are installed on the frame on the feed port side of the inner tank, one side of the first sealing module is fixedly connected to the feed cover, and the sealing member inside the first sealing module cooperates with the outer wall of the inner tank in a sealing manner; a second sealing module and a discharge cover are slidably installed on the frame on the discharge port side of the inner tank, one side of the second sealing module is fixedly connected to the discharge cover, and the sealing member inside the second sealing module cooperates with the outer wall of the inner tank in a sealing manner, and a plurality of connectors cooperating with the outer wall of the inner tank are installed on the other side of the second sealing module, so that the axial position of the second sealing module and the inner tank remains unchanged. Thereby reducing the wear of the sealing member in the sealing module and improving the sealing performance of the rotary kiln.

The invention relates to the technical field of iron and steel smelting, in particular to a heat insulation refractory material and a preparation process and a permanent layer structure thereof, and the heat insulation refractory material comprises the following raw materials: high-alumina bauxite, corundum, corundum spinel, high-purity high-activity alumina micro powder, a high-purity alumina nano light material, an expansion additive, a molding plasticity additive and an inorganic complexing agent; the problems that an existing refractory material is poor in heat preservation, low in strength and insufficient in temperature resistance are solved. Meanwhile, a firing-free preparation process of the refractory material is provided, so that the production energy consumption and cost are reduced; the invention further provides a permanent layer structure comprising the refractory material, the effects of heat preservation, safety and light weight are achieved, it can be guaranteed that the safety coefficient is increased, the thermal resistance rate of the refractory material can be reduced, the heat preservation effect is improved, the advantage that the production cost is not greatly increased is achieved, and therefore the production cost of metallurgical enterprises is greatly reduced, and the production rhythm and efficiency are greatly improved.

The utility model discloses a combined fire box liner which is recombined and adopts a new material to replace a refractory material, that is to say, only the lower section of a head part subjected to high-temperature impact is still combined by an insulation board and the refractory material, and other parts adopt a method of spraying a curing agent on the surface of an elastic ceramic fiber folding block to replace the refractory material. The weight of the fire box is greatly reduced, the hoisting process is not afraid of vibration, site construction is convenient, the construction period is shortened, and large-tonnage hoisting equipment is not needed.

The invention relates to a direct reduction plant with at least one reactor which is equipped with a refractory material.

The utility model relates to the technical field of oxalic acid catalytic debinding furnaces, in particular to a heat loss prevention oxalic acid catalytic debinding furnace which comprises a base, a mounting plate is mounted on the surface of the base, a furnace body is mounted on the surface of the mounting plate, a servo motor is mounted on the surface of the furnace body, and a heat preservation device is arranged on the surface of the furnace body. And the heat preservation device comprises two first arc-shaped rods, the two first arc-shaped rods are both slidably connected with the furnace body, heat preservation plates are fixedly connected to the surfaces of the first arc-shaped rods, and second arc-shaped rods are fixedly connected to the surfaces of the heat preservation plates. According to the utility model, the temperature in the furnace body is prevented from being influenced by the external environment in the working process of the furnace body, so that the temperature of the furnace body is quickly lost, the furnace body can continue to work only by continuously heating the temperature in the furnace body, and the waste of heat energy is avoided, so that the oxalic acid catalytic degreasing speed is reduced; the heat loss speed in the oxalic acid catalytic degreasing furnace is reduced, and the oxalic acid catalytic degreasing efficiency is improved.

According to the hot air circulation device of the curing oven, one end of a shell is open, a wind wheel, a double-air-outlet volute, a mixing box and a heating assembly are arranged in a first space formed by the shell, the wind wheel is arranged in a volute cavity of the double-air-outlet volute, and an air outlet of the double-air-outlet volute is connected with the mixing box; a first-stage spoiler is arranged at the position, corresponding to the air outlet, in the mixing box body, a second-stage spoiler is arranged at the opening end of the mixing box body, and the heating assembly is arranged between the double-air-outlet volute and the mixing box body; during working, the wind wheel sucks gas heated by the heating assembly, the gas passes through the double-air-outlet volute and then is exhausted into the mixing box body through the air outlet, the gas is decelerated through the first-stage spoiler and mixed in the mixing box body, and then the gas is rectified through the second-stage spoiler and then exhausted to a workpiece to be cured. Compared with the prior art, the hot air circulation device of the curing oven is provided with the two-stage spoilers and the mixing box body, so that the gas speed is reduced, the gas is fully mixed and then makes contact with a workpiece to be cured, and the curing quality can be effectively improved.

To provide a stud installed at a steel shell upon lining an unshaped refractory to an industrial furnace, the stud being movable following the movement of the unshaped refractory during use, and its installation structure.SOLUTION: A stud 1 installed at a steel shell 6 of an industrial furnace lining an unshaped refractory comprises: a base part 2 having a through hole 21 and fixed to the steel shell 6; and a stud body 3 inserted into the through hole. The stud body 3 has a bend part 31, the bend part is fixed to the base part 2 at a side in contact with the inner face of the through hole 21 by tack welding 5, and a gap is provided between a face other than the side in contact with the inner face of the through hole 21 of the bend part 31 and the inner face of the through hole 21. Adjacent studs 1 are plurally installed at a steel shell of a rotary kiln so as to be rotated by 90 degrees with respect to the central axis of the stud body 3 each other.SELECTED DRAWING: Figure 1

The present invention relates to a precast ring for use in a furnace, a refractory lining comprising a precast ring and a dry vibration material and a method of forming a refractory lining.

The utility model discloses a large heat preservation module, which belongs to the technical field of heat preservation modules and comprises a high-temperature-resistant fiber blanket and a low-temperature-resistant fiber blanket which are stacked. The device further comprises a fixing assembly, the fixing assembly comprises a round pipe inserted in the high-temperature-resistant fiber blanket and a round rod inserted in the low-temperature-resistant fiber blanket, and the round pipe and the round rod are relatively fixed. The strength of the insulation block is improved, and the durability and stability requirements of large-size insulation blocks are met.

The invention discloses a modular integrated vacuum high-temperature sintering forming device adaptive to a multi-gravity field environment. The modular integrated vacuum high-temperature sintering forming device comprises a metal sealing experiment box body and an axis heating assembly integrated in the metal sealing experiment box body, the axis heating assembly adopts a high-temperature-resistant vacuum sealing pipe end face sealing structure and is combined with a loose fastening mechanism, so that quick plugging and electrical / mechanical dual locking of a sample unit are realized, and the problems of connection failure and floating under a dynamic load are solved; the heating unit adopts a tubular silicon nitride heat transfer matrix matched with an external zirconium oxide and aerogel multi-layer heat insulation structure, high-temperature sintering in a wide temperature zone of 1100 DEG C to 1600 DEG C is realized under low power consumption, and the temperature rise of the surface of the box body is effectively controlled; the rotary acceleration assembly is connected through the mechanical interface, a variable gravity experiment environment is constructed by using centrifugal force, and the device is small in overall size and high in shock resistance and meets the harsh requirements of space station operation and ground supergravity simulation.

The utility model relates to the technical field of steel rolling heating furnaces, in particular to a water beam stand column for a heating furnace, which comprises an outer pipe and a core pipe which are mutually sleeved, the outer pipe comprises a head pipe, a neck pipe, a body pipe and a tail pipe which are mutually connected, and the core pipe comprises a bevel head pipe and a core pipe body which are mutually connected. The core tube body is arranged at the axis position of the body tube and fixedly connected with the body tube through a connecting piece. The beveled head pipe extends into the head pipe, and a beveled opening of the beveled head pipe faces the water flow inlet; a tail pipe convex flange is arranged at the bottom of the tail pipe, a tail pipe convex flange cover matched with the tail pipe convex flange is arranged at the bottom of the tail pipe convex flange, and the tail pipe convex flange cover is connected with the tail pipe convex flange through a tail pipe convex flange bolt. The water beam stand column is simple in structure, sediment can be removed by opening the tail pipe convex flange cover arranged at the bottom, and the inner pipe wall can be cleaned conveniently.

The application belongs to the technical field of reaction furnace, and discloses a heat insulation structure and a reaction furnace, the heat insulation structure comprising a shell, a cover and a connecting assembly. The shell is hollow inside and is configured to be filled with heat insulation material; the first end of the connecting assembly is positioned at the upper edge of the opening of the shell and extends along the cover to the lower edge of the opening of the shell, and the second end of the connecting assembly is positioned at the lower edge of the opening of the cover or the shell to press the cover to the opening of the shell; the lower edge of the opening of the shell is provided with a clamping piece for clamping the second end of the cover or the connecting assembly. The heat insulation structure is a split structure, which is convenient to transport and assemble, has high reliability after assembly and ensures heat insulation effect.

The invention discloses a hanging structure for a heating furnace open-hearth top, the heating furnace open-hearth top and a construction method, and relates to the technical field of furnace refractory castable structures and construction. Comprising a top formwork, side formworks arranged on the periphery of the top formwork, a plurality of anchoring bricks detachably arranged on the top formwork and a top hanging assembly connected to the tops of all the anchoring bricks, the top hanging assembly is hung on a steel beam assembly, and all the anchoring bricks are vertically arranged on the top formwork and tensioned between the hanging assembly and the top formwork. A hole is formed in the upper portion of the anchoring brick to serve as a hanging hole, a hole is formed in the lower portion of the anchoring brick to serve as an installation fixing hole, the structure of the anchoring brick is in a full-movable mode and completely adapts to thermal expansion stress of castable in all directions, all the anchoring bricks are evenly stressed, fastening can be conducted again before use and in the use process, and all the anchoring bricks are evenly stressed.

The utility model relates to the technical field of heat treatment furnaces, and discloses a high-temperature heat treatment furnace with an in-furnace heat preservation structure, which comprises a furnace body, the bottoms of the left and right sides of the inner wall of the furnace body are fixedly connected with supporting rods, the middle parts of the outer walls of the supporting rods are in threaded connection with knobs, and the middle upper parts of the left and right sides of the inner wall of the furnace body are provided with grooves; a rack is slidably connected to the interior of the groove, a clamping plate is fixedly connected to the top of the rack, a rotating handle is rotatably connected to the front side of the outer portion of the groove, a gear is fixedly connected to the other end of the rotating handle, the gear is connected with the rack in a meshed mode, and heat preservation layers are installed on the left side and the right side of the inner wall of the furnace body correspondingly. The sides, away from each other, of the two heat preservation layers are each provided with a heat insulation layer. According to the heat preservation structure, the heat preservation structure is supported through the supporting rods, the heat preservation structure is fixed through the clamping plates and the rotary knobs, and the problem that in the prior art, the replacement time of the heat preservation structure is long, and efficiency is affected is solved.

To provide a pouring material for firing furnaces, which does not require a drying process after pour construction, can suppress physical impact from the contents of the furnace, and can suppress alkali attack.SOLUTION: A pouring material for a firing furnace, which is formed by adding 0.5 mass% or more and 5 mass% or less of colloidal silica as a SiO2 component to a refractory raw material mixture, wherein the refractory raw material mixture comprises: a total of 75 mass% or more of one or more of alumina raw material, alumina-silica raw material, and silicon carbide raw material; 1 mass% or more and 15 mass% or less of silica flour; and 0.5 mass% or less (including zero) of a CaO component derived from alumina cement.SELECTED DRAWING: None

The utility model relates to a steel fiber castable preform with a guard plate in the technical field of preformed parts, comprising a preformed part body having a flow channel installation groove running longitudinally through the middle of the top surface in the transverse direction, a preformed liner with a flow channel and a guard plate, wherein the preformed liner is movably plugged into the inner side wall of the preformed part body up and down and fits in the flow channel installation groove; the tops of the two side walls of the preformed part body are detachably connected with guard plates, and the guard plates are pressed onto the corresponding top surfaces of the preformed liner side walls, and the inner side of the guard plates is provided with an inner extension portion extending to above the preformed liner flow channel; the utility model can block splashing of the castable material due to the provision of the inner extension portion when splashing occurs, so as to prevent the castable material from flying out; due to the provision of the preformed liner, when the preformed liner is damaged due to high temperature during long-term use, the preformed liner can be replaced separately, thereby reducing the replacement cost.

The invention relates to a direct reduction system having at least one reactor which is equipped with a refractory material.