43 results about "Firebrick layer" patented technology

The invention discloses a construction method for a spherical furnace top of an industrial furnace. Firstly, a steel furnace shell is mounted, the elevation and the like of steel supporting plates at the arch springing positions of a globe-roof are rechecked, a vertical control line is arranged from the center of the furnace bottom to the center of the furnace top in a drawn mode, a supporting frame is erected in a furnace body, and a round top plate is arranged in the center of the top; multiple vertical arc plates are then manufactured and are fixed on the round top plate and the supporting frame, and the elevation and the radius of each layers of refractory bricks are marked on the corresponding vertical arc plates; multiple horizontal arc plates are manufactured; the refractory bricks at the arch springing positions are constructed first, the refractory bricks are constructed upwards in sequence, the vertical radian and the elevation of the refractory bricks are controlled by using the vertical arc plates, and the horizontal radius of the refractory bricks is controlled by using the horizontal arc plates; one heat preservation brick layer is constructed after one certain layer of the refractory bricks are constructed, and the construction is carried out in the way until the construction of all the refractory brick layers and the construction of all the heat preservation brick layers are completed; a steel cover plate of the furnace top is mounted in a hanging mode to seal the steel furnace shell. The construction method for the spherical furnace top of the industrial furnace has the advantages of being economical in used material, simple in working procedure, low in cost and the like, and can ensure construction quality more easily.

The invention discloses a sieve plate-free fluidizing chlorination furnace with the function of discharging slag from the upper part and the side of the fluidizing chlorination furnace. The fluidizing chlorination furnace is a tank body which adopts a steel structure and comprises an upper cylindrical cylinder body, a lower cylindrical cylinder body, an upper papilionaceous sealing head and a lower papilionaceous sealing head, wherein the diameter of the upper cylindrical cylinder body is different from that of the lower cylindrical cylinder body. A chlorine gas inlet chamber is arranged at the bottom of the fluidizing chlorination furnace; a material fluidizing section is arranged in the middle of the fluidizing chlorination furnace; a gas-solid separation section is arranged at the upper part of the fluidizing chlorination furnace. The chlorine inlet chamber and the material fluidizing section are lined with refractory bricks; the inner surface of the gas-solid separation section is covered with high-temperature-resistant anti-corrosive composite ceramic paint so as to prevent high-temperature chlorine gas from corroding the gas-solid separation section; a gas outlet is formed in the central position of the upper sealing head; fine-particle slag is discharged from the gas outlet along with airflow after chlorination reactions; a side slag discharge port is formed in the side wall of the upper part of the chlorine gas inlet chamber and used for discharging coarse-particle slag discontinuously; two layers of chlorine gas inlet pipes, which are designed specially, are arranged in the chlorine gas inlet chamber; each chlorine gas inlet pipe orifice is provided with a blowing block joint; the chlorine gas inlet pipes are inserted into the refractory brick layer and extend to the chamber of the fluidizing chlorination furnace; chlorine gas and blowing block airflow are prevented from impacting the refractory brick layer.

Provided are: a molten glass conduit structure, in which the erosion of a solid heat insulating material constituting a backup of a conduit can be prevented by a molten glass that exudes from a joint part between electrocast bricks constituting the conduit, without using any cooling means, and which can be manufactured at a reduced cost; a vacuum defoaming device using the conduit structure; and a method for vacuum defoaming a molten glass using the vacuum defoaming device. The molten glass conduit structure, said conduit structure comprising a conduit and a backup provided on the periphery of the conduit, is characterized in that: the conduit is a hollow tube having electrocast bricks disposed in the longitudinal direction and circumferential direction thereof; the backup comprises a refractory layer provided on the outside of the conduit and a heat insulating material layer provided on the outside of the refractory layer; the refractory layer comprises a refractory brick layer consisting of refractory bricks disposed in the longitudinal direction and circumferential direction of the conduit and a monothilic refractory layer that is formed by laying a monothilic refractory, said monothilic refractory containing, in terms of mass percentage of oxide(s), 30-100% of Al2O3 and 0-70% of SiO2, and then sintering the monothilic refractory; the heat insulating material layer comprises a solid heat insulating material layer comprising a solid heat insulating material disposed in the longitudinal direction and circumferential direction of the conduit; and the electrocast bricks constituting the conduit, the monothilic refractory constituting the monothilic refractory layer and the refractory bricks constituting the refractory brick layer are selected in such a manner that, when the molten glass passes through the conduit, a site being at the same temperature as the pour point of the glass is positioned within the heat insulating material layer.

The invention discloses a maintenance method of a blast furnace main channel. The maintenance method comprises the following steps of replacing an old steel tank with a new steel tank, respectively arranging a refractory brick layer and a heat insulation layer at the bottom and the side surface of the new steel tank, and sequentially arranging a bottom permanent layer and a prefabricated part layer on the refractory brick layer, wherein a hole for arranging a thermocouple is reserved on the surface, close to a heat insulation layer, of each prefabricated part in the prefabricated part layer, and the thermocouple penetrates through the heat insulation layer through shells at two sides of the steel tank and is inserted into the hole of the prefabricated part; and then, hanging a mold above the bottom permanent layer and the prefabricated part, and pouring refractory materials among the permanent layer, the prefabricated part layer and the mold to form a working layer. According to the maintenance method of the blast furnace main channel, the working layer of the main channel covers the large-volume and firm prefabricated part, so that the structure is stable. Even if the prefabricated part is damaged, a certain damaged prefabricated part can be lifted out for replacement, and the process is simple. Meanwhile, the thermocouple is additionally arranged, so that an operator can judge the working condition of the working layer of the corresponding area in real time, an accurate maintenance scheme is provided, the maintenance period is prolonged, and the service life of the main channel is prolonged.

The invention provides an improved type side-blowing molten pool smelting furnace. The improved type side-blowing molten pool smelting furnace comprises a long round furnace body, a furnace cylinder, a furnace top, a furnace body frame structure and a plurality of multi-channel spray guns. The multi-channel spray guns are arranged on the two sides of the long round furnace body correspondingly. The long round furnace body is formed by a furnace body protective plate in an enclosed mode. A water sleeve is installed on the lower portion of the inner side of the furnace body protective plate. A first firebrick layer is further inlayed in the inner side of the water sleeve. A second firebrick layer is arranged on the water sleeve and the first firebrick layer and installed on the inner side of the furnace body protective plate. The furnace cylinder is arranged at the bottom of the long round furnace body. The long round furnace body is provided with a metal discharge outlet and a slag outlet. The furnace body frame structure comprises steel vertical pillars, cross beams and pulling rods. The multi-channel spray guns are arranged on the two sides of the middle straight segment of the long round furnace body, and the output ends of the multiple multi-channel spray guns extend into the long round furnace body. By means of the improved type side-blowing molten pool smelting furnace, the problem that in the prior art, the temperature in a molten pool smelting furnace is difficult to control can be solved.

The invention relates to a gas catalytic flameless near-infrared heating annealing furnace, and relates to an annealing furnace. The gas catalytic flameless near-infrared heating annealing furnace comprises a furnace shell, a furnace liner, a heating system, a cooling system and a transport system, wherein a fire-resisting material layer is arranged between the furnace shell and the furnace liner, the heating system is embedded in the fire-resisting material layer and is a gas catalytic flameless near-infrared heating porous medium burner, the heating system comprises a burner body, a heat preservation layer and a refractory brick layer, a pre-mixed gas dispersing chamber, a perforated plate, a pre-mixed gas homogenizing chamber, a flame-preventing screen plate and a foam ceramic plate are arranged in the refractory brick layer, the bottom of the pre-mixed gas dispersing chamber is communicated with a pre-mixed gas supply pipe, and heat-preserving cotton is arranged between the periphery of the pre-mixed dispersing chamber and the refractory brick layer; the upper end surface and the lower end surface of the burner body are connected together by virtue of an upper pressing plate, a lower pressing plate and a connecting piece. The gas catalytic flameless near-infrared heating annealing furnace is high in heat efficiency, complete in burning, low in pollutant emission and applicable to the annealing process needing the protection of atmosphere in the furnace, has characteristics of high temperature, low energy consumption, high yield, low repair cost and the like and is likely to popularize and use.

The invention relates to a blast furnace packing layer air gap judgment method, and belongs to the technical field of blast furnace ironmaking. The blast furnace packing layer air gap judgment methodcomprises the following steps: a reference energy transfer coefficient k1<reference> between a refractory brick layer and a cooling wall, a reference transfer coefficient k2<reference> between the cooling wall and a furnace shell and a reference transfer coefficient k3<reference> between the refractory bricks and the furnace shell are determined according to the refractory brick temperature corresponding to the cooling wall, the furnace shell temperature corresponding to the cooling wall and the water temperature difference of water inlet and outlet pipe heads of the cooling wall; and k1<measurement>, k2<measurement> and k3<measurement> obtained according to the current detection data and a relational expression are respectively compared with k1<reference>, k2<reference> and k3<reference>to judge whether an air gap exists in a packing layer of a blast furnace body and judge the change of the air gap. The judgment method is convenient for technicians in the field to judge the air gap,and can effectively guide the technicians of the blast furnace process to treat the air gap by adopting a grouting filling method.

A firebox for a grill is provided. The firebox has a shell, an insulation layer, and a firebrick layer. The firebrick layer comprising a plurality of firebricks that form an inner peripheral surface of the firebox. The insulation layer formed between the firebrick layer and the shell or the insulation layer forming the outermost layer of the firebox. The shell preventing the collapse and / or unwanted airflow into the internal cavity of the firebox if a fracture is formed in the firebrick layer.

The invention discloses a dry-process cement firing system. The system comprises a decomposing furnace body, a reduction chamber is arranged at the lower end of the decomposing furnace body, a kiln tail smoke chamber is arranged at the lower end of the reduction chamber, a rotary cement kiln is arranged at one end of the kiln tail smoke chamber, and a fuel adding chamber is arranged at the end, away from the kiln tail smoke chamber, of the rotary cement kiln. A cooling machine is arranged at the lower end of the fuel adding chamber, a secondary air pipe is connected between the cooling machineand the rotary cement kiln, a tertiary air pipe is connected between the cooling machine and the decomposing furnace body, a kiln-entering raw material pipe connected with the kiln tail smoke chamberis arranged at the bottom end of a five-stage preheater, and a cement raw material adding port is formed in the five-stage preheater. The furnace wall of the decomposing furnace body is composed of ashell, a first heat insulation layer, a connecting felt layer, a second heat insulation layer and a refractory brick layer. Through the system, the temperature in a decomposing furnace in the cementfiring system is guaranteed, and the energy-saving effect is obvious.

The invention discloses a blast furnace ironmaking device with a high-leakproofness hearth. The blast furnace ironmaking device comprises a furnace foundation, a bottom plate, a furnace shell, a sealing plate, a first cooling device, a sealing device and a heat conducting isolation barrel, wherein a refractory brick layer and a concrete layer are sequentially horizontally arranged in a space formed by the sealing plate and the bottom plate from up to down; the first cooling device is arranged between the sealing plate and the upper surface of the refractory brick layer; the first cooling device comprises a first cooling pipe, a second cooling pipe and a plurality of heat conducting connecting plates which are in the shape of a mosquito-incense holder; the sealing device is arranged on theouter side wall of the bottom of the furnace shell; the sealing device comprises an integrally formed sealing barrel and a sealing round plate which is horizontally and fixedly connected to the upperend of the sealing barrel; two groups of drainage plates are vertically and fixedly connected between the heat conducting isolation barrel and the furnace shell; and two groups of heat conducting plates are vertically and fixedly connected between the heat conducting isolation barrel and the sealing barrel. According to the blast furnace ironmaking device, temperature of the hearth can be decreased, the hearth can be subjected to liquid seal, and leakproofness of the hearth is greatly improved.

The invention relates to the technical field of all-electric melting furnaces, in particular to an all-electric melting energy-saving melting furnace for borosilicate float glass production, a using method and a product. The all-electric melting energy-saving melting furnace comprises a steel structure framework, the bottom of the steel structure framework is a stand column supporting furnace outer layer steel structure of a steel-concrete structure, and a heat preservation brick layer is arranged on the inner wall of the steel structure framework; the steel structure framework is of a dodecahedron vertical funnel structure, the steel structure framework and the heat preservation brick layer are connected through adjusting bolts, a refractory brick layer is arranged on the inner wall of the heat preservation brick layer, electrode holes are formed in the side wall of the refractory brick layer, and a top cover hanging brick is arranged at the top end of the inner wall of the heat preservation brick layer. The method is convenient to operate and high in operability.

The invention discloses a construction method for a spherical furnace top of an industrial furnace. Firstly, a steel furnace shell is mounted, the elevation and the like of steel supporting plates at the arch springing positions of a globe-roof are rechecked, a vertical control line is arranged from the center of the furnace bottom to the center of the furnace top in a drawn mode, a supporting frame is erected in a furnace body, and a round top plate is arranged in the center of the top; multiple vertical arc plates are then manufactured and are fixed on the round top plate and the supporting frame, and the elevation and the radius of each layers of refractory bricks are marked on the corresponding vertical arc plates; multiple horizontal arc plates are manufactured; the refractory bricks at the arch springing positions are constructed first, the refractory bricks are constructed upwards in sequence, the vertical radian and the elevation of the refractory bricks are controlled by using the vertical arc plates, and the horizontal radius of the refractory bricks is controlled by using the horizontal arc plates; one heat preservation brick layer is constructed after one certain layer of the refractory bricks are constructed, and the construction is carried out in the way until the construction of all the refractory brick layers and the construction of all the heat preservation brick layers are completed; a steel cover plate of the furnace top is mounted in a hanging mode to seal the steel furnace shell. The construction method for the spherical furnace top of the industrial furnace has the advantages of being economical in used material, simple in working procedure, low in cost and the like, and can ensure construction quality more easily.

The application relates to a method for judging the air gap of a filling layer of a blast furnace, which belongs to the technical field of blast furnace ironmaking. The method for judging the air gap of the blast furnace filling layer includes determining the reference energy transfer coefficient between the refractory brick layer and the stave according to the temperature of the refractory brick corresponding to the stave, the temperature of the furnace skin corresponding to the stave, and the water temperature difference between the inlet and outlet water pipe heads of the stave k 1基 , the reference transfer coefficient k between stave and furnace skin 2基 And the reference transfer coefficient k between the refractory brick and the furnace skin 3基 . K obtained according to the current detection data and relational formula 1测 、k 2测 、k 3测 respectively with k 1基 、k 2基 、k 3基 Compare and judge whether there is an air gap in the filling layer of the blast furnace body and the change of the air gap. This judging method is convenient for those skilled in the art to judge the air gap, and can effectively guide blast furnace technicians to control the air gap by grouting and filling.

The invention discloses a rotary hearth furnace hearth structure. The rotary hearth furnace hearth structure which is a multilayer structure sequentially comprises, top to down, a carbon composite material layer which contains 8-45% of graphite and 92-54% of fused magnesia magnesium oxide, a carbon composite material layer which contains 8-45% of graphite and 92-54% of fused magnesia magnesium oxide, a mullite firebrick layer, a high-alumina brick layer, and a light-weight thermal-insulation brick layer. So the comprehensive hearth has a special slag erosion resistance and a metal and liquid slag adhesion resistance, and the dimension stability problem of expend with heat and contract with cold of the hearth is solved.

The invention provides a secondary zinc oxide leaching device, which relates to the technical field of recycling. This zinc oxide leaching device includes a shell, the inner bottom of the shell is provided with a heat exchange tube group, the inner wall of the shell is fixedly connected with a horizontal partition at the lower part, and the middle part of the horizontal partition is provided with an ash drain, The inner wall of the housing and the upper surface of the horizontal partition are provided with a refractory brick layer, the inner wall of the housing and the upper surface of the refractory brick layer is fixedly connected with a lower mounting plate, and the middle part of the lower mounting plate is provided with a leaching pool , the outer surface of the leaching tank is fixedly connected with a discharge pipe at the lower part. Through the leaching tank, the electrode sheet and the heating and roasting of the leaching tank, different structural and functional combinations can separate different components in secondary zinc oxide under different conditions. The overall structure is compact and occupies a small area. The role of the smoke adsorption layer It can absorb the coal smoke and then discharge it, which is friendly to the environment and can clean the leaching tank.

The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to an experimental device for simulating the congealed iron layer in a hearth of a blast furnace. The bottom layer of refractory bricks, the sample crucible, the melting funnel connected to the sample crucible and the top breathable refractory brick layer are arranged in sequence from bottom to top. The thermocouple is connected with the melting funnel in turn; the thermocouple runs through the exhaust port and the top air-permeable refractory brick layer and is inserted into the funnel wall of the melting funnel, and the thermocouple is electrically connected to the temperature control display instrument; and, the gas connected to the air inlet bottle. Through this device, the experimental device is heated to make the metal particles reach their melting point. Under the high pressure of the protective gas, the metal will enter the sample crucible along the melting funnel, so that the space between coke and coke and the inside of the coke pores will be filled with metal. The desired simulated iron layer samples can be prepared.