1325 results about "Fire brick" patented technology

The invention provides a boiler combustion state visualization method, which comprises the steps of embedding a plurality of thermocouple temperature sensors in gaps of refractory bricks on the inner wall of a boiler hearth, acquiring temperature data of the hearth at different depths in real time, and transmitting the temperature data to a data acquisition terminal through a wireless communication module; fitting the normalized temperature data matrix by adopting a three-dimensional thin-plate spline interpolation algorithm to generate a hearth three-dimensional real-time temperature distribution model, performing mesh generation on the three-dimensional temperature distribution model by combining hearth geometric structure parameters obtained from computer aided design software, and constructing a hearth temperature finite element model; the hearth temperature finite element model is imported into ANSYS finite element analysis software, hearth wall surface material attributes and combustion heat load boundary condition parameters are set, transient thermal analysis of a hearth temperature field is carried out, and a temperature estimation value of any position of the hearth changing along with time is obtained.

The invention provides a high-temperature-resistant magnesia-carbon composite refractory brick and a preparation method thereof, and belongs to the technical field of magnesium oxide refractory wall bricks, the refractory brick comprises the following raw materials: double-layer modified magnesium oxide, modified crystalline flake graphite, zircon powder, modified liquid phenolic resin and a benzoxazine cross-linking agent; the double-layer modified magnesium oxide is obtained by firstly coating magnesium oxide with powder phenolic resin, aluminum oxide and zirconium oxide and then coating magnesium oxide with asphalt, micron magnesium oxide, zirconium oxide and calcium oxide; the modified crystalline flake graphite is obtained by coating crystalline flake graphite with strontium hydroxide, asphalt and boron carbide; the modified liquid phenolic resin is formed by mixing liquid phenolic resin with a silane coupling agent and a polyacrylate cross-linked polymer. Double-layer modified magnesium oxide, modified crystalline flake graphite and modified liquid phenolic resin are prepared by adopting special components and a method and are matched with zircon powder and a benzoxazine cross-linking agent for use, and a reasonable forming and sintering process is designed, so that the refractory brick has good high-temperature stability, oxidation resistance, thermal shock resistance and the like.

The invention discloses a fitting regression model-based steel ladle refractory brick erosion parameterization evaluation and steel ladle safety monitoring method, which comprises the following steps of: making a fitting regression model by using the furnace number historical offline steel ladle age of a smelted steel type and metallurgical process technological parameters, and finding out significant factors influencing the erosion of a steel ladle refractory brick by adopting a variance analysis method; digitalizing the erosion capability of each parameter of the smelting process on the steel ladle refractory brick; relative to historical data, the fitting regression model is subjected to response optimization, and the maximum allowable package age is found. Smelting target parameters set by the process are substituted into the fitting regression model, and 95% confidence interval and 95% prediction interval of a calculated value are output; actual smelting process parameters of each furnace are substituted into the fitting regression model, a calculated value is obtained and compared with a 95% prediction interval, and if the calculated value is lower than the 95% prediction interval, a system sends out an abnormal erosion alarm of the steel ladle brick. The reasonable service life of the refractory brick can be estimated, abnormal alarm is given in the steel ladle smelting process, and the operation risk is reduced.

The invention relates to the technical field of amorphous zirconia corundum bricks, in particular to an amorphous zirconia corundum refractory brick and a preparation method thereof.The amorphous zirconia corundum refractory brick comprises, by weight, 60-70 parts of alumina powder, 25-35 parts of zircon sand, 5 parts of additives and 11-13 parts of binder.The preparation method comprises the steps of mixing, pouring, drying in the shade and baking. The components of the amorphous zirconia corundum refractory brick are adjusted, silica sol is added as a binder, and one or more of a binder additive, a water reducer additive and a dispersant additive is / are selected as an additive, so that alumina powder and zircon sand are dispersed more uniformly and combined more tightly; and in the preparation process, the green bricks are heated and baked by utilizing a transformed and innovated trolley furnace, the heating is uniform, and the formed amorphous zirconia corundum refractory brick is compact in structure, high-temperature-resistant, corrosion-resistant and permeation-resistant.

The utility model discloses a special-hole combined refractory brick which comprises a refractory brick body and a brick plug used for blocking, the refractory brick body is of a square structure, an observation hole is formed in the center of the refractory brick body, the observation hole is of an oval structure, and the observation hole penetrates through the whole refractory brick body. An observation hole is formed in one side of the refractory brick body, a plug hole is formed in the side, provided with the observation hole, of the refractory brick body, the plug hole is a round notch, the size of the plug hole is larger than that of the observation hole, and a brick plug is installed in the plug hole. As the brick plug is mounted in the plug hole for sealing and preventing the observation hole from being opened all the time, and the safety hole and the safety helmet are mounted on the brick plug, before the brick plug is opened, the safety helmet is opened to check whether safety exists or not, and potential safety hazards caused by large internal and external pressure difference are prevented.

The invention discloses an annular furnace heat-resistant supporting forged chassis and an additive manufacturing process and a fixing device thereof, and belongs to the technical field of plating of metal materials, and the annular furnace heat-resistant supporting forged chassis comprises the steps that heat-resistant alloy steel base metal with specific components is prepared; carrying out laser texturing and nickel-based alloy bottom layer pretreatment on the surface of the steel plate; performing laser cladding on high-silicon high-temperature alloy powder containing niobium and rare earth elements to form a functional cladding layer, and performing gradient cladding on the edge of the atmosphere guide hole; and finally, carrying out heat treatment and assembling with a fan-shaped refractory brick fixing device. A composite oxide film and a multi-scale strengthening system are constructed, hydrogen resistance and brittleness resistance are effectively achieved, interface thermal stress is relieved, cracking and stripping of a cladding layer are avoided, a fixing device adapts to thermal expansion, the atmosphere is dredged, and the annealing uniformity of a steel coil is improved; the problems of creep deformation, hydrogen embrittlement, cladding layer stripping and thermal stress cracking of a traditional supporting component under the conditions of high temperature, heavy load and nitrogen and hydrogen atmosphere are solved.

The present invention relates to the technical field of refractory brick production, and in particular to a raw material quantitative mixing device for refractory brick processing, comprising a mixing tank and a mixing mechanism arranged in the mixing tank for stirring the refractory brick raw materials, a discharging frame is fixedly connected to the top of the mixing tank, a metering cylinder is fixedly connected to the top of the discharging frame, a discharging mechanism for quantitatively discharging the raw materials in the metering cylinder is arranged in the discharging frame, an upper cylinder is fixedly connected to the center position inside the metering cylinder, four partitions are fixedly connected equidistantly between the inner side of the metering cylinder and the upper cylinder, arc-shaped discharging ports are opened at the bottom end of the metering cylinder and between the four partitions, adjustment plates are arranged on the side walls of the four partitions, and four lower cylinders are rotatably connected to the inner side of the upper cylinder. Through the arrangement of the above-mentioned structure, the present invention can quickly and flexibly adjust the storage space of the metering cylinder on the mixing tank according to the demand for increasing the quantity of raw materials for refractory brick production, can meet the production needs of refractory bricks with different performances, and greatly improve the convenience performance of the device.

The invention provides a sampling device for refractory brick detection, and relates to the technical field of material sampling, the sampling device comprises a device main body and a drill cylinder with a vertical axis, and water is supplied to the lower end of the drill cylinder and sampling teeth through a water supply hole for cooling and lubrication. After first sampling, continuous water supply may be accumulated in the sampling groove, during later sampling, the through hole closest to the lower end of the drilling barrel is in an open state firstly, the negative pressure cavity sucks water accumulated in the sampling groove through the through hole, meanwhile, the drilling barrel continues to drill into the refractory brick, and the movable part in the through hole closest to the lower end of the drilling barrel makes contact with a sample; the through hole is closed and loses a water suction function, and water accumulated in the sampling groove is ensured to be within a certain range, so that the lower end of the drill barrel and the sampling teeth can be cooled and lubricated, a sample taken out later can be prevented from being excessively soaked, the subsequent drying work is reduced, and the working efficiency is improved. And irreversible damages, such as strength reduction and structure looseness, to the sample are reduced.

According to the forming equipment for refractory brick machining, the forming equipment is applied to the technical field of refractory brick forming, the composite die composed of the upper die body, the lower die body and the side die body is arranged, the upper die body, the lower die body and the side die body can punch refractory bricks during forming, and therefore the refractory bricks can be punched and formed in all directions; refractory bricks can be formed more uniformly, the density gradient is reduced, then the cracking phenomenon is reduced, the forming quality of the refractory bricks is improved, downward stamping force of the upper die can be converted into stamping force of the side face and the bottom face through a reversing stamping part arranged in the side die and a lower stamping part arranged in the lower die, all-directional stamping forming is achieved, and the production efficiency is improved. The fixed separating pieces are arranged between the adjacent side dies, the situation that formed refractory bricks are adsorbed on the side dies and are difficult to take out is prevented through side die separation, discharging is more convenient and efficient, meanwhile, abrasion of the side dies and the refractory bricks caused by friction between the refractory bricks and the side dies during discharging can be avoided, the side dies are protected, and the forming quality of the refractory bricks is improved.

The invention belongs to the technical field of refractory materials, and particularly relates to a dispersion breathable refractory brick and a production process thereof. The dispersion breathable refractory brick is prepared from the following raw materials in parts by mass: 50-60 parts of silicon / titanium coated corundum particles, 30-40 parts of corundum particles, 15-20 parts of alumina micro powder, 8-12 parts of magnesium oxide micro powder, 3-5 parts of activated alumina micro powder, 1-3 parts of niobium pentoxide, 4-8 parts of phenolic resin and 3-5 parts of water. The prepared dispersion breathable refractory brick has the advantages of being high in slag corrosion resistance, good in thermal shock resistance, high in mechanical property and the like.

The invention discloses an intelligent management system and method applied to smelting equipment, and relates to the technical field of smelting, in-furnace infrared imaging detection is carried out on a reaction tower of a flash furnace in real time, a real-time temperature distribution image in the furnace is obtained, and region division is carried out; according to the real-time temperature condition of the area, the area with the abnormally high temperature is determined; hot spot analysis and adhering slag falling analysis are carried out on the area with the abnormally high temperature, and the reason of the phenomenon of abnormally high temperature is identified; if the reason of the abnormally high phenomenon is that the adhering slag falls off, controlling the change of the raw material components and the heat load at the same time, and accelerating the forming of the adhering slag; active intervention adjustment is adopted, the reaction speed is high, efficiency is high, the slag adhering process can be quickly intervened by directly adjusting ingredients, the relative position of a concentrate nozzle and an air adjusting cone, the cooling water amount of a copper water jacket and the like, the slag adhering period can be greatly shortened, and therefore scouring erosion of high-strength reaction to a reaction tower body is reduced, and the safety of refractory bricks and the water jacket is guaranteed; and the intrinsic safety of the metallurgical furnace is improved.

The invention provides a refractory material conveying and feeding system, and mainly relates to the field of refractory material conveying for refractory product production. A refractory material conveying and feeding system comprises a temporary storage bin, an elevator and a feeding device, a weighing bin and a weighing platform are arranged below the tail end of the elevator, a feeding device is arranged at the tail end of the feeding device and comprises a feeding frame, a feeding arm and a feeding bin, a supporting frame is arranged at the top of the feeding bin, and a guide cylinder is vertically arranged in the center of the supporting frame; a guide rod is slidably arranged in the guide cylinder, and a guide die is arranged at the bottom of the guide rod. The device has the beneficial effects that the layout that the middle is low and the periphery is high can be completed in the link that refractory materials are conveyed into the lower forming die, the production efficiency of the large refractory bricks is improved, the forming density of the edges of the large refractory bricks is improved, and the defective rate of the refractory bricks which are high due to edge breakage is reduced.

The utility model discloses a corrosion-resistant micropore light refractory brick production device, and relates to the technical field of refractory brick production devices, in particular to the corrosion-resistant micropore light refractory brick production device which comprises a mounting plate, a supporting column, a stirring barrel and a smashing box, a feeding pipe is fixedly connected to the top of the smashing box, and a mounting frame is fixedly connected to the front face of the smashing box. A first motor is fixedly mounted at the top of the mounting frame, a driving shaft and a driven shaft are rotationally connected into the crushing box, crushing rollers are fixedly connected to the exteriors of the driving shaft and the driven shaft, a feeding pipe is fixedly connected to the bottom of the mounting plate, a stirring mechanism is arranged in the stirring barrel, and a connecting block and a discharging pipe are fixedly connected to the bottom of the stirring barrel; damping springs are fixedly mounted at the bottoms of the connecting blocks, supporting legs are fixedly connected to the bottoms of the damping springs, a pipe cover is clamped to the bottom end of the discharging pipe, a cleaning mechanism is arranged at the top of the mounting plate, raw material particles can be uniform through arrangement of the crushing mechanism, and subsequent use convenience can be ensured through arrangement of the cleaning mechanism.

The utility model discloses a blast furnace castable cooling wall, which relates to the technical field of blast furnace body cooling equipment and comprises a cooling wall base body, a cooling water pipe is arranged inside one side of the cooling wall base body, and a protective sleeve is sleeved on the side surface of the cooling water pipe extending out of the cooling wall base body; dovetail-shaped grooves are vertically formed in the side face of the other side of the cooling wall base body at intervals, anchoring parts are transversely arranged in the dovetail-shaped grooves at intervals, the anchoring parts in every two adjacent dovetail-shaped grooves are vertically arranged in a staggered mode, and a pouring layer is poured on one side of the dovetail-shaped grooves of the cooling wall base body; the blast furnace cooling wall has the beneficial effects that the part of the cooling water pipe pre-embedded in the cooling wall base body is protected by the protective sleeve, the casting technology of the blast furnace cooling wall hot surface after casting molding can adopt on-site integral casting construction, and the casting material is integrally cast on the hot surface of the cooling wall, so that the problems of falling and damage of refractory bricks, complex construction process and low construction cost in the past can be avoided. And the slag adhering capacity is high, the overall performance is good, and the device can adapt to large blast furnace body cooling working conditions.

The utility model discloses a durable refractory brick forming device which comprises a box body, a forming mechanism is installed at the bottom of the inner side of the box body, the forming mechanism comprises a reinforcing frame, a mold frame is installed on the inner side of the reinforcing frame, and the mold frame can be inserted into the inner side of the reinforcing frame in a sliding mode and can be fixed through bolts. The die frame is installed on the inner side of the reinforcing frame, certain protection and reinforcing effects can be achieved in the extrusion forming process of refractory bricks, the durability of the die frame is improved, meanwhile, due to the fact that the die frame can be detached from the reinforcing frame, the die frame can be conveniently and regularly cleaned and maintained, and the service life of the die frame is prolonged. And the mold frame is kept in a good use state, is not easy to damage and is more durable, so that the durability of the refractory brick forming equipment is improved.

The utility model relates to the technical field of double-chamber kilns, and in particular to a double-chamber kiln channel refractory brick anti-falling structure, including a floor and a wall, the surface of the floor is fixedly connected to the two ends of the wall, the outer wall of the wall is provided with fireproof bricks, the gap between the two fireproof bricks is matched, and the outer walls of the two fireproof bricks are fitted. The threaded column in the anti-falling structure is inserted into the interior of the sleeve, and then the staff turns the handle, the handle drives the threaded column to rotate, the threaded column is turned to the interior of the sleeve, the threaded column drives the disc to move, the disc and the connecting plate are tightly fitted together, the connection and the curved plate are fixed with the surface of the fireproof brick to prevent the fireproof brick from falling off, the wall and the fireproof brick form a double-chamber kiln channel. The anti-falling structure is set. When the refractory bricks inside the double-chamber kiln channel are prevented from falling off, the fireproof bricks are supported by the curved plate and the connecting plate, and the fireproof bricks will not be suspended in the air, thereby improving the use effect of the anti-falling structure.

The invention relates to the technical field of refractory bricks, and discloses a pressing device for refractory brick production, the pressing device comprises a rack, a mold assembly is mounted on the rack, the mold assembly comprises a mold body, the mold body is provided with a vertically through cavity, a cover mold is arranged in the cavity, and a top plate is arranged in the cover mold; the die assembly further comprises a power part which is used for driving the cover die and the top plate to vertically move. A feeding assembly is installed above the mold assembly. The cover die is arranged in the cavity, and the cover die is upwards inserted into the hopper to take materials, so that during insertion, the raw materials can directly and vertically enter the cover die, even if a fillet in a small area protrudes, the raw materials can be normally filled, and the problem of insufficient blanking in the area is avoided; and the compactness after pressing and the quality of the fired refractory brick are ensured.

The novel tap hole structure comprises a furnace shell, an iron notch frame is installed on the side face of the furnace shell and located at the position of a blast furnace iron notch, and a plurality of prefabricated parts extending towards the interior of the furnace shell are arranged in the center of the interior of the iron notch frame. The multiple prefabricated parts are connected end to end, stemming channels penetrating through the iron notch frame are formed in the prefabricated parts, and first protruding parts which protrude outwards and are evenly arranged are arranged outside the prefabricated parts; the mud sleeve structure is reasonable in design structure and convenient to use, the mud sleeve structure formed by the prefabricated part is adopted to replace an existing mud sleeve structure formed by laying refractory bricks and pouring refractory materials in an iron notch area, the service life of the iron notch area can be prolonged on the premise that the thermal shock stability and the structural stability of the iron notch area are improved, and the service life of the iron notch area is prolonged. And the maintenance cost rise caused by frequent damage is avoided, and the normal working requirement of the blast furnace is met.

The invention relates to the technical field of refractory brick production, and discloses a high-strength refractory brick for a garbage incinerator and a preparation method thereof.The high-strength refractory brick is prepared from, by mass, 32-45 parts of fly ash, 18-30 parts of kieselguhr, 6-10 parts of modified aluminum silicate fibers, 20-30 parts of nano zirconium silicate loaded crystalline flake graphite powder, 7-10 parts of metal oxide and 1-3 parts of auxiliary materials. Fly ash and diatomite are used as raw materials, modified aluminum silicate fiber, nano zirconium silicate loaded crystalline flake graphite powder, metal oxide and auxiliary materials are compounded, the prepared refractory brick has high mechanical strength, fire resistance and oxidation resistance, the product quality of the refractory brick is improved, the refractory brick is prevented from cracking in the waste incineration process, and the service life of the refractory brick is prolonged.

The utility model discloses an automatic stacking device for storing refractory materials, which belongs to the field of mechanical arm clamps, and is characterized in that a telescopic pipe connected with a silica gel sucker is arranged at the bottom of a shell to be of a telescopic structure; the silica gel suction cup and the telescopic pipe can automatically stretch and fit according to the surface form of the refractory bricks, and contact suction of the refractory bricks with the outer walls in different forms is achieved; two exhaust channels are formed in the ejector pin, and a T-shaped channel communicated with the two exhaust channels is formed in the ejector pin, so that after negative-pressure adsorption is completed, external positive-pressure gas can blow air to the filter screen through a positive-pressure air blowing pipe, a first connecting hose and a second connecting hose, and then dust adhering to one side of the filter screen is blown out through the T-shaped channel and the two exhaust channels; and dust is prevented from blocking the interior of the second connecting hose, the influence on the suction force of the clamp and the overhaul and maintenance frequency are reduced, and the use convenience is improved.

The invention discloses a method for preparing refractory bricks from carbon fibers recovered from a carbon-carbon composite material quitting service in a photovoltaic thermal field, and relates to the technical field of refractory materials. According to the method, carbon fibers in the carbon-carbon composite material of the photovoltaic thermal field are subjected to cleaning, drying, length control and other treatments, and then refractory raw materials such as kaolin, magnesium oxide and aluminum oxide and binding agents and additives such as phenolic resin are prepared according to a specific proportion. Then, dry-mixing the powder and the carbon fibers, wet-mixing the granules and the binding agent by a horizontal mixer, and finally mixing by a double-shaft paddle mixer to ensure that the materials are uniform; afterwards, a brick press and a steel mold are used for compression molding, drying is conducted through a drying kiln, firing is conducted through an electric furnace, precise temperature and time control is conducted in all stages, and finally polishing finishing and quality detection are conducted. The prepared refractory brick is excellent in performance, has good high temperature resistance, erosion resistance and thermal shock resistance, opens up a new way for reutilization of photovoltaic thermal field wastes, and has remarkable economic and environmental benefits.

The invention relates to the technical field of refractory brick stacking, in particular to a refractory brick stacking device and a using method thereof.The refractory brick stacking device comprises an equipment base, guide rails are fixedly arranged on the left side and the right side of the equipment base, and two sets of driving rollers are rotationally arranged in the guide rails. According to the refractory brick stacking device and the using method thereof, the horizontally-moving rack pushes the clamping plate on the rear side to move forwards, the clamping plates on the front side and the rear side move relatively to push and arrange refractory bricks, the conveying belts on the two sides move the refractory bricks on the tray to the middle, and the refractory bricks on the left side and the right side are extruded, conveyed and arranged mutually. The tray is matched with the arrangement rack and the first helical tooth rack in the process of transporting the refractory bricks, the refractory bricks can be pushed in the front-back direction and the left-right direction, brick bodies which are placed in irregular positions are automatically centered and arranged, a user does not need to manually arrange the refractory bricks when placing the refractory bricks, the labor intensity of workers is reduced, and the stacking efficiency is improved.

The invention discloses a method for measuring the torsion resistance of a refractory brick based on a three-dimensional point cloud, and belongs to the technical field of machine vision. The method comprises the following steps: collecting a three-dimensional point cloud of a to-be-detected surface of a refractory brick, and preprocessing the three-dimensional point cloud to obtain a planar point cloud; establishing an object coordinate system based on a principal component analysis method; obtaining a target depth image and an index map based on the plane point cloud; performing X-shaped sampling on the target depth image in the to-be-detected area, and obtaining a sampling point cloud in combination with the index map; and based on the sampling point cloud, obtaining the torsion degree of the refractory brick through a torsion degree evaluation method. The method improves the efficiency and accuracy of measuring the torsion resistance of the refractory brick.

The invention discloses refractory material production safety protection turnover conveying equipment which comprises a conveying table and a conveying belt, the conveying belt is rotationally embedded in the conveying table, the arrangement assembly is arranged on the outer wall of the conveying table, and the arrangement assembly comprises an auxiliary frame, an adjusting frame, a mounting table, a lifting air cylinder, a lifting plate, a resistance reduction wheel, a rubber pad, a blocking wheel and a guide rail. The arrangement assembly drives a lifting plate and a rubber pad through a lifting air cylinder, the vertical position and the horizontal posture of the refractory bricks can be dynamically adjusted in combination with sliding of a resistance reduction wheel on a guide rail, the overturning assembly drives a driving frame to move along a sliding rail through a clamping air cylinder, and brick bodies are grabbed without damage in combination with negative pressure adsorption of a suction cup and flexible limiting of a mounting ring. A buffer spring and a limiting frame form an elastic clamping system, the thickness error of the brick body is dynamically compensated, overpressure damage is avoided, the whole process is automatically connected, the tidying assembly straightens the position of the brick body in advance, and a safety protection accurate clamping reference is provided for the overturning assembly.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are improved.

The invention relates to the technical field of converter safety monitoring, in particular to a method for predicting the thickness of refractory bricks based on converter wall temperature. The temperature distribution and the residual thickness of the refractory bricks are estimated according to the external furnace body temperature and the melt smelting temperature, and then the overhaul of the converter is judged according to the temperature distribution and the residual thickness of the refractory bricks, so that the real-time safety monitoring in the operation process of the converter is realized. The problem of how to monitor the operation risk of the converter is solved.

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 utility model relates to a raw gas conveying pipeline which comprises a pipeline body and a composite sealing heat insulation lining arranged in the pipeline body. The pipeline body is made of carbon steel, and the composite sealing heat insulation lining is composed of a refractory brick supporting layer, a sealing layer and a heat insulation layer which are sequentially arranged from inside to outside. According to the utility model, while the pipeline investment is reduced and the service life of the pipeline lining is greatly prolonged, the problem that the heat insulation effect of the pipeline is invalid due to the fact that tar and other substances in the high-temperature raw gas permeate into the heat insulation layer is avoided, and long-distance stable conveying of the high-temperature raw gas in the direct reforming process is realized.

The utility model relates to the technical field of refractory brick tunnel kiln, and discloses a waste heat utilization device for a refractory brick tunnel kiln, including a heat recovery component and a preheating component, wherein the heat recovery component includes a kiln body, a recovery box is fixedly connected to the top of the kiln body, a heat storage box is fixedly connected to the top of the inner cavity of the recovery box, a blower is fixedly connected to the top of the recovery box, an air outlet on the right side of the blower is connected to a heat absorption pipe, and the end of the heat absorption pipe away from the blower passes through the inner cavity of the heat storage box. The beneficial effects achieved by the utility model are: the heat in the high-temperature flue gas is recovered and utilized by the heat recovery component, so that the heat is heated to heat the air entering the burner, and the normal temperature air is prevented from lowering its internal temperature after entering the burner, thereby increasing the fuel consumption; the partially recovered high-temperature air is directly transported to the preheating section of the kiln body through the preheating component to preheat the materials entering the kiln, further reducing the fuel consumption during the material roasting process, and improving the waste heat utilization rate of the tunnel kiln.

The application relates to the field of fireproof bricks, and discloses a baking-free fireproof brick and a preparation method thereof. The baking-free fireproof brick comprises iron tailings, cement, fly ash, a functional additive, fine aggregate, quartz sand, a chromium aluminum phosphate binder, a water reducing agent and water. The functional additive is prepared by using aluminum chloride hexahydrate and alkaline silica sol as raw materials, ammonium molybdate tetrahydrate as a catalyst, growing mullite whiskers on the surface of silicon carbide fibers through vacuum impregnation and heat treatment, modifying the prepared composite silicon carbide fibers through 3-(methacryloxy) propyl trimethoxysilane, and then copolymerizing the modified composite silicon carbide fibers with acrylic acid and 4-hydroxybutyl vinyl ether. The chromium aluminum phosphate binder is prepared by using aluminum hydroxide, phosphoric acid and chromium trioxide as raw materials and calcium hydroxide as a curing agent. The baking-free fireproof brick prepared through the synergistic effect of the components has high compressive strength and bending strength, small water absorption and good baking-free fireproof and heat insulation performance.