146results 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.

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.

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.

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.

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 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.

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

The present application provides a kind of electronic component heating and pressurizing treatment furnace fast preparation device, including a containing space in the furnace;At least one heating device, is arranged in the containing space to adjust the temperature in the containing space to a predetermined temperature;At least one pressurizing device, to adjust the pressure in the containing space to a predetermined pressure greater than 1atm;At least one replaceable heat insulation liner, including an outer layer and an inner layer;And a fan, is arranged in the containing space, and is connected to a driving motor via a transmission shaft protruding from the cavity, whereby, contaminated and clean replaceable heat insulation liner can be quickly replaced, and is forced in the furnace using a plurality of radial expansion structures and a plurality of C-shaped rings, so that the preparation work can be quickly completed, the downtime maintenance time is greatly shortened, effectively increases production efficiency and capacity.

The application discloses a construction method for prolonging the service life of a large titanium slag smelting furnace, and belongs to the technical field of smelting production equipment maintenance and repair processes. The method is convenient to operate, can effectively guarantee the repair quality, and can effectively prolong the service life of the electric furnace by 3-5 years. The method comprises the following steps: discharging molten iron, slag and a dead iron layer with a specified thickness before stopping power supply and furnace, reinforcing the furnace body, removing a sealing steel platform on an upper furnace shell and corresponding auxiliary dust removal pipelines, protectively removing the furnace shell, furnace wall lining and furnace bottom lining that need to be replaced, manufacturing a new furnace shell, sequentially assembling and welding the new furnace shell, protectively recovering the furnace bottom lining and the furnace wall lining, finally recovering the sealing steel platform around the upper furnace shell and the auxiliary dust removal pipelines, and performing the normal metallurgical production after furnace baking, preheating and slag hanging, so that the repair work of prolonging the service life of the titanium slag smelting furnace is completed.

The utility model provides an expansion joint vault structure and a drying furnace. The vault structure is composed of three split-type vaults which are sequentially connected, and the three split-type vaults are the middle vault and the two side vaults respectively. The left side edge and the right side edge of the middle vault are in lap joint with the edges of the two side vaults, and top expansion joints are arranged at the lap joint positions, so that gaps for thermal expansion and cold contraction exist between the split structures. The drying furnace is composed of the vault structure and a furnace wall, the left side edge and the right side edge of the vault structure are fixedly connected with the furnace wall, the front side edge and the rear side edge of the vault structure are connected with the furnace wall in an embedded mode, and side face expansion joints are arranged at the embedded connecting positions. According to the utility model, an integrated arch crown structure of the drying furnace is improved into a split structure, and the expansion joints are additionally arranged between the split structures and between the split structures and the furnace wall, so that the arch crown structure has self-adaptive capacity of thermal expansion and cold contraction, and cannot be damaged due to excessive extrusion.

The utility model provides a kind of sintering machine ignition furnace roof refractory lining structure.The lining structure is by a first prefabricated block with burner hole and a second prefabricated block without burner hole alternate splicing, first expansion joint is equipped between two adjacent prefabricated blocks, second expansion joint is equipped between the adjacent two prefabricated blocks of same column;Each first prefabricated block and second prefabricated block is respectively equipped with multiple refractory anchoring hanging bricks, and the first prefabricated block and the second prefabricated block are connected with the inner wall of ignition furnace roof by refractory anchoring hanging brick respectively.The utility model uses refractory prefabricated part to assemble ignition furnace roof lining instead of integral pouring lining, thereby reducing the size of ignition furnace roof refractory lining pouring body, construction quality is easy to control, its structural strength and uniformity are good, integrity is promoted, avoids stratification, also avoids that pouring body generates more irregular cracks and gap due to size is larger, also shortens furnace heating time, greatly reduces the maintenance construction period.

The efficient natural gas heating furnace comprises a furnace body, a furnace door, a combustion system, a pipeline system and a refractory material assembly, and the furnace door drives a moving trolley to move on a guide rail through chain wheel and chain transmission and drives the furnace door to move up and down; the hydraulic cylinder drives the connecting rod mechanism to drive the furnace door to be loosened and pressed. The combustion system is arranged at the top of the furnace body, the refractory material assembly comprises castable, and a furnace mouth, the lower portion of a furnace lining side wall, the lower portion of a furnace lining rear wall and a furnace bottom are made of the castable; the castable at the lower part of the side wall of the furnace lining is provided with an inclined surface structure, and the inclination angle alpha is 15-35 degrees. The temperature uniformity of the hearth is improved, sealing between the furnace door and the furnace body is enhanced, and the natural gas combustion heat utilization rate is increased.

The present invention provides a method for coating the bottom of a steel pot, comprising the steps of placing a mold on the bottom of the steel pot, securing the mold with a clamping mechanism, attaching refractory material to the bottom of the steel pot and below the mold, applying a load to the mold, and removing the mold from the refractory material. The present invention is effective because it allows for increased metal yield in the pot and reduced non-metallic inclusions that would normally be entrained by the formed vortex.

The invention discloses a high-thermal-shock low-thermal-conductivity plastic material, a preparation method and a use method thereof, and an application of the plastic material in preparation of a steel rolling heating furnace wall, and relates to the technical field of refractory materials for heating furnaces. The plastic refractory with high thermal shock and low thermal conductivity comprises the following raw materials in percentage by mass: 20-45% of microporous zirconium mullite particles, 25-50% of silicon modified special-grade alumina particles, 5-10% of andalusite / sillimanite composite powder, 1-5% of mullite whiskers, 10-20% of an aluminum dihydrogen phosphate / silica sol composite binder, 2-5% of polystyrene microspheres and 3-5% of nano yttrium oxide stabilized zirconia powder. Through the design of the raw materials and the proportion, the thermal shock stability, the heat insulation performance and the refractoriness of the heating furnace wall plastic refractory are synchronously optimized, and the performance indexes of the prepared plastic refractory after burning are as follows: the plastic refractory is not broken after being subjected to thermal shock (water cooling) for 20 times at the temperature of 1100 DEG C, and the breaking strength is 6.8-9.7 MPa after being subjected to thermal shock for 20 times; the breaking strength at normal temperature is 17.7 to 27.3 MPa; the thermal conductivity at 800 DEG C is less than or equal to 0.7 W / (m.K); the refractory material is especially suitable for preparation of a furnace wall for a steel rolling heating furnace.

The invention relates to a reinforced inner cylinder for a cement preheater, and belongs to the technical field of cement production equipment. The reinforcing structure comprises a plurality of first reinforcing assemblies and a plurality of second reinforcing assemblies, each first reinforcing assembly comprises a first connecting piece and two first reinforcing plates, the two first reinforcing plates are arranged in a spaced mode, the two ends of each first connecting piece are connected with the bottoms of the two first reinforcing plates respectively, and the first reinforcing assemblies are made to be in a U shape; the second reinforcing assembly comprises a second connecting piece and two second reinforcing plates, the two second reinforcing plates are arranged at intervals, and the two ends of the second connecting piece are connected with the tops of the two second reinforcing plates correspondingly, so that the second reinforcing assembly is in an inverted U shape; the first reinforcing assemblies and the second reinforcing assemblies have radians, the first reinforcing assemblies and the second reinforcing assemblies are arranged in a staggered mode, and the adjacent first reinforcing assemblies and second reinforcing assemblies are connected in an inserted mode. The mounting and dismounting device has the effect of improving the problem of low dismounting and mounting efficiency of the inner cylinder of the preheater.