CN104677111A - High-strength climbing type double-splint thin shell buckle lining structure - Google Patents
High-strength climbing type double-splint thin shell buckle lining structure Download PDFInfo
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- CN104677111A CN104677111A CN201510088962.1A CN201510088962A CN104677111A CN 104677111 A CN104677111 A CN 104677111A CN 201510088962 A CN201510088962 A CN 201510088962A CN 104677111 A CN104677111 A CN 104677111A
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Abstract
The invention discloses a high-strength climbing type double-splint thin shell buckle lining structure and belongs to the field of large-size smelting furnaces. A lining is divided into a plurality of partitions, wherein a metal separate backing ring or a refractory concrete isolating beam fixed on a steel shell is arranged on the edge of each lining partition; the structure of each lining partition sequentially comprises a flexible isolating layer, a lightweight insulating layer and a castable working layer from the outside to the inside; each flexible isolating layer is respectively fixed with the corresponding steel shell and the corresponding lightweight insulating layer through high-strength coating layers on two sides of each flexible isolating layer; two opposite surfaces of each lightweight insulating layer and each castable working layer are rough surfaces of which the shapes are complemented, so that each lightweight insulating layer and the corresponding castable working layer form a high-strength buckling structure. According to the high-strength climbing type double-splint thin shell buckle lining structure disclosed by the invention, the integral strength of the lining is greatly improved by using a mechanical structure formed by bulking the castable working layer and the lightweight insulating layer; the surface area of the lining at the connected part of buckles is far greater than that of a fire firing surface of each castable working layer, so that the integral shock resistance of the furnace is greatly improved, and the stability of the lining is improved.
Description
Technical field
The present invention relates to large-scale smelting stove field, a kind of high-strength climbing prolongs formula double plate shell hasp furnace lining structure specifically.
Background technology
Along with the raising of environmental consciousness and the contradiction of shortage of resources, and the energy-conserving and environment-protective of smelting building material industry, compression manufacturing cost requirement, these industries are generally to intensive, development of maximizing, wherein as the smelting kiln of one of production line nucleus equipment, also more and more maximize, need to bear more complicated hot smeltingization reaction strongly.After stove shape is determined, stove furnace lining carries all high temperature smelting functions and heat energy guiding function, is the core component of stove.Furnace lining self also consumes heat energy in thermal process process, and the smelting kiln body of heater of maximization, does not have spare unit in production line, blowing out must repair, lose huge once damage.Therefore, large-scale stove, in the urgent need to more stablizing solid stove furnace lining, can adapt to long period health and run.
Chinese large-sized smelting stove is mostly together introduce from the external production line introduced successively nearly two more than ten years, and furnace lining configuration is in company with introducing.The furnace lining introduced is brick furnace lining, what be close to outer steel shell is light-weight brick heat-insulation layer furnace lining, nexine is that the working lining of heavy laying fireproof bricks meets fiery furnace lining, two floor kiln lining gross thickness, between 550mm to 750mm, meets fiery working lining bricking thickness through body of heater furnace roof between 340mm to 500mm.A major comonomer furnace lining weight can reach 1000 to thousands of tons of.Therefore, the skeleton structure and the foundation of civil work that support large-scale body of heater are very large, and this body of heater furnace lining becomes the main flow furnace lining of present Large Furnace kiln lining.
But this furnace lining has a lot of shortcoming.For example: the mechanical structure of this furnace lining is separation property dual-gripper system, namely the continuous support system of outer steel shell metal and internal refractory brick working lining pile up formula support system, both mechanical support system is because belong to the outer steel shell of metallic bond material and the refractory brick of covalent bonded material, increase with temperature and present different expansions and deviate from and show different Strength Changes and pattern of body form change, between each layer furnace lining, the special disease of different calorific intensitys and expansion characteristics is had between furnace lining and outer steel shell, along with the raising of temperature, cause layering between furnace lining, furnace lining is separated with outer steel shell, two mechanical structures are caused to be separated, furnace lining stability declines, the body of heater shape of stove and volume are expanded again be restricted.And for example, high level refractory raw material is day by day rare, and in order to maintain the stable of furnace lining self, existing furnace lining adopts the structure of same furnace lining and thickness to be configured regardless of body of heater position and corresponding smelting condition, is the waste to high level refractory raw material resource; And for example: a large amount of building mortar layer of brick furnace lining meeting fire defines bricking meeting fire and can produce " sticky heat " phenomenon during thermal field on bricking work furnace lining surface in contacting, the intensity difference that brick body and puzzle joint are formed causes interior thermal field heat to pass through puzzle joint back and forth and produces hot harmonic wave at interior thermal field edge and hot spiral-flow produces interference to heating center, causes thermal source to waste; And for example: very thick furnace lining makes body of heater heavy, cause converter body support skeleton and foundation of civil work to strengthen, construction investment increases.
Summary of the invention
For solving the unreasonable above-mentioned problems causing occurring of existing large-scale smelting stove furnace lining structure, the invention provides a kind of high-strength climbing and prolonging formula double plate shell hasp furnace lining structure.
The present invention is the technical scheme solving the problems of the technologies described above employing: a kind of high-strength climbing prolongs formula double plate shell hasp furnace lining structure, furnace lining is divided into several subregions, the edge of each furnace lining subregion is provided with and is fixed on metal separation backing ring on outer steel shell or refractory concrete isolation beams, metal separation backing ring or refractory concrete isolation beams by the weight unloading of this subregion furnace lining on outer steel shell; The structure of described each furnace lining subregion is followed successively by flexible isolating layer, lightweight thermal insulation layer and castable working lining from outside to inside, wherein, high-strength dope layer is provided with in the both sides of flexible isolating layer, flexible isolating layer is fixed with outer steel shell and lightweight thermal insulation layer respectively by the high-strength dope layer of its both sides, two faces that described lightweight thermal insulation layer is relative with castable working lining are the male and fomale(M&F) of shape complementarity, with the hasp fastening structure making lightweight thermal insulation layer and castable working lining form high strength; Some metal anchorages and nonmetal anchoring piece is provided with to carry out anchoring to furnace lining in each furnace lining subregion, one end of metal anchorage and nonmetal anchoring piece is fixed on outer steel shell, and the other end is embedded in castable working lining after running through flexible isolating layer and lightweight thermal insulation layer.
The high strength hasp fastening structure that described lightweight thermal insulation layer and castable working lining are formed refers to, two faces that lightweight thermal insulation layer and castable working lining contact with each other are equipped with embedding inside each other concavo-convex, to ensure the bond strength of lightweight thermal insulation layer and castable working lining.
Described flexible isolating layer is made up of two-layer above flexible laminar's insulation material, and its thickness is 2-4 times of outer steel shell thickness; Described lightweight thermal insulation layer is built by laying bricks or stones by insulation blocks and is formed; The thickness of described castable working lining is less than the thickness of lightweight thermal insulation layer.
The thickness of described castable working lining is 80-200mm.
Described refractory concrete isolation beams is cast on outer steel shell by refractory material and is formed, and its shape is unrestricted, only isolates furnace lining not affecting in the functional situation of stove.。
Described nonmetal anchoring piece, the surface along its vertical furnace lining direction has tongue and groove, to strengthen anchor force.
In the present invention, outer using high-strength airtight outer steel shell as external splint, also be furnace lining intensity basis, furnace lining nexine be the solid airtight high-strength castable working lining of one deck as inner splint, centre is the flexible isolating layer and lightweight thermal insulation layer that intensity and density are all lower; Outer steel shell and flexible isolating layer, adopt high-strength coating to be formed between flexible isolating layer and lightweight thermal insulation layer high-strength dope layer bonding, adopt the mutual hasp snapping of tongue and groove complementary mutually that interlocks that is harmonious between lightweight thermal insulation layer and castable working lining furnace lining.In the present invention, the rigidity of different furnace lining material and flexible collocation, shrinkage and dilatancy collocation, density of material and material bear the collocation of thermal shock power performance, the furnace lining that different materials is combined mutually is learnt from other's strong points to offset one's weaknesses to couple hardness with softness and is combined closely, no matter normal temperature state or the condition of high temperature can both completely become to be integrated.
The present invention is by furnace lining subregion, in each district, there are a small amount of metal anchorage and nonmetal anchoring piece to fix, at the edge in each district, metal separation backing ring or refractory concrete isolation beams are set, make furnace lining Divisional, subregion on outer steel shell, unload loading capacity and pressure.
Furnace lining structure of the present invention only has a mechanical support system, and the basis of this mechanical support system is the outer steel shell with the continuous high strength of stable and uniform, forms outer laminated plank; Opposite side clamping plate are the high-strength castable working linings with superior elevated temperature strength and volume stability, centre is that to be close on inside outer steel shell be the lightweight thermal insulation layer that flexible isolating layer and metal separation backing ring or refractory concrete isolation beams are separated, and upwards to climb prolong by means of anchoring piece, metal separation backing ring or refractory concrete isolation beams along outer steel shell.Being close on inside outer steel shell is flexible isolating layer and near the lightweight thermal insulation layer be pasted together, the two is filled in the sandwich of layers between high-strength castable working lining and outer steel shell, it is protective layer, add air-tightness and the pliability of furnace lining, protect again lightweight thermal insulation layer simultaneously and do not squeezed bad by outer steel shell; Lightweight thermal insulation layer opposite side is male and fomale(M&F), and tightly bonding with the castable working lining of respective complementary male and fomale(M&F), recline, snap together, form high strength hasp snapping; The another side of high-strength castable working lining is the meeting fire of smooth densification, the heat that interior thermal field passes over is formed the feedback of reflection eddy flow in interior thermal field, thermal field in furnace lining is separated with body of heater inner chamber smelting heat-transmission field, thermal field is prevented to infect to furnace lining inside, protect the smoothly complete of interior thermal field edge simultaneously, maintain the complete of heating center and uniformity; Whole furnace lining is divided into different regions, furnace lining certain interval arrange metal anchorage by around position furnace lining be fixed on the outer steel shell of corresponding position; Arrange metal separation backing ring or refractory concrete isolation beams in each furnace lining edges of regions and the furnace lining of regional can be carried out personalized setting respectively by functional requirement, each position furnace lining weight unloads on outer steel shell by means of metal anchorage and metal separation backing ring simultaneously.When furnace lining bears high temperature, high-strength castable working lining distortion is very little, still remains very high hardness and intensity, provides stable intensity and rigidity supplemental support to outer steel shell, the distortion simultaneously self being also subject to outer steel shell pins down and retrains, and prevents breaking and layering of furnace lining.
The every layer thickness of furnace lining structure of the present invention is assigned as: with the thickness of outer steel shell for benchmark, and flexible isolating layer is made up of two-layer above flexible laminar's insulation material, and flexible isolating layer gross thickness is 2 times of outer steel shell thickness to 4 times; Lightweight thermal insulation layer is built by laying bricks or stones by insulation blocks and is formed, and thickness and profile require to arrange flexibly according to furnace lining heat-insulating property; The thickness of castable working lining is less than light thermal-insulation layer thickness, is 80-200mm, according to operating temperature region and smelting metallization processes requirement adjustment thickness and the profile flexibly of furnace lining.
Practical significance of the present invention is as follows:
1, in the present invention, the thickness of castable working lining only has 80mm to 200mm, routine work furnace lining decreases 30-40% on year-on-year basis, thus makes the more conventional furnace lining of castable working lining weight of furnace lining decrease 25-35%, makes the reduction corresponding to foundation of civil work of the steel structure support of supporting body of heater;
2, in the present invention, castable working lining inner surface configuration and furnace lining material kind can according to different Functional Requirements can subregion arrange, subregion adjustment, make furnace lining of the present invention be provided with functional regulating measure, and be beneficial to subregion transformation and the subregion maintenance in furnace lining later stage in the future;
3, only have a mechanical structure system in the present invention, there is good thermal shock resistance, also not stratified under various temperature duty, do not fear rapidly and repeatedly start-stop stove;
4, inner furnace lining of the present invention is that multiple material integrated configuration forms, furnace lining makes hot kinetic potential direction in the sensing fundamental sum stove of the hot kinetic potential of furnace lining consistent in the vertical cube thermal boundary effect that upwards multi-layer configuration produces at work, the inner not stratified inner thermal field of furnace lining that makes of furnace lining is stablized, and serves the effect of wrapping up the multilayer of kinetic potential hot in stove; And traditional furnace lining has a lot of crack on the cross section of furnace lining, these cracks can be that hot harmonic wave is walked and guided the outer box hat of stove simultaneously into and produce heat energy and reveal in furnace lining the thermal energy of thermal field in burner hearth.Therefore, climb the thermal boundary effect that ductility double plate shell hasp furnace lining structure produces at work although of the present invention and make the heat-proof quality of the thinning furnace lining of furnace lining higher, thus energy-conservation;
5, in the present invention, between castable working lining and lightweight thermal insulation layer, the mechanical structure of hasp makes furnace lining bulk strength greatly increase, the furnace lining surface area of hasp joint is far longer than the meeting fire of castable working lining, the overall thermal shock resistance of furnace lining is increased greatly, thus the Integral Loading ability of furnace lining and distortion resistance are increased greatly, thermal shock resistance also increases greatly, also makes furnace lining have superior stability and capability of overload and anti-disaster ability;
6, in the present invention, the intensity basis of furnace lining is insulation or the flame retardant coating furnace lining of outer steel shell instead of each layer, the insulation of each layer or flame retardant coating furnace lining are that subregion hangs on outer steel shell, so the strength characteristics of furnace lining entirety is the high strength monolithic combined kiln lining having the continuous uniform of very high-flexibility with metallicity, under hot operation state, the hot mastication trend that outer steel shell produces the high temperature rigid intensity that has by castable working lining make up, the hot kinetic potential shock wave that in body of heater, thermal field outwards transmits is by flexible isolating layer, each layer furnace lining combination interfaces such as lightweight thermal insulation layer and castable working lining stop and store, establish the inner thermal field of stable furnace lining, also establish the isolation strip of thermal field and the inner thermal field of furnace lining in stove, effectively protect the metal strength feature of outer steel shell simultaneously.
In the present invention, lightweight thermal insulation layer has-50 DEG C of combinations to the insulation blocks of 700 DEG C of stable topography, and insulation blocks is continuous male and fomale(M&F) towards the working face of castable working lining; The raw material of castable working lining be volume substance more than 2.0 Dun ∕ cubic meters, no matter normal temperature or temperature higher than 1400 DEG C can proof strength at the loose refractory of more than 2MP, after shaping towards the working face of lightweight thermal insulation layer be also male and fomale(M&F), staple together with the male and fomale(M&F) of lightweight thermal insulation layer and be harmonious formation in conjunction with hasp, and the surface area of both hasp abutted surfaces is far longer than the surface area of castable working lining meeting fire.Metal anchorage and nonmetal anchoring piece, and metal separation backing ring is directly fixed on outer steel shell; Refractory concrete isolation beams hangs on outer steel shell.Castable working lining is by means of metal anchorage or nonmetal anchoring piece, and metal separation backing ring, refractory concrete isolation beams are upwards climbed along outer steel shell and prolonged, and become and climb ductility furnace lining.
Furnace lining of the present invention is lattice sandwich structure, metal separation backing ring and refractory concrete isolation beams are point grids, outer steel shell is high-strength outer laminated plank, high-strength castable working lining is nexine clamping plate, flexible isolating layer and lightweight thermal insulation layer common combination become the filling heart, the tractive that the furnace lining of separation is subject to nonmetal anchoring piece (anchored brick) and metal anchorage stably fixing on a corresponding position.
The present invention compares tool with conventional furnace lining and has the following advantages:
1) furnace lining bulk strength is very high, two mechanical structure is formed by outer steel shell and heavy castable working lining, effectively the high-temperature behavior that the steel of metallic bond are different with the refractory material of covalent bond is blended together, lightweight thermal insulation layer and heavy castable working lining link closely mutually, flexible isolating layer is attached between outer steel shell and lightweight thermal insulation layer, overall in conjunction with the high-strength combined kiln lining of formation one;
2) lightweight thermal insulation layer and the combining form of heavy castable working lining hasp make the bonded area of high-temperature region furnace lining external surface area and lightweight thermal insulation layer furnace lining greatly increase, make heavy castable working lining obtain clearing up releiving to the thermal expansion extruding force of lightweight thermal insulation layer transmission and the thermal shock power of fierce mutual damage and become the attaching power of mutual intensity complementation, thus the thermal shock resistance of furnace lining is increased greatly and does not break and layering because of the sharply change of temperature of furnace lining;
3) the invention belongs to light-duty shell layer flexible furnace lining structure furnace lining, be made up of composite wafer shape structural material, effectively make use of the hot interfacial effect of shell material combination, furnace lining multilayer interface cohesion face stores a large amount of heat energy, although furnace lining is lighter than conventional furnace lining, much thin, but furnace lining thermal capacitance storage capacity is greater than conventional furnace lining, make furnace lining can ensure overall high strength and thermal shock resistance;
4) composite wafer structure of the present invention and high seal absorb storage to the heat attempted by furnace lining on the hot interface of each layer of furnace lining, and form outside thermal field obstruct, greatly slow down the speed of furnace lining Warm status to external diffusion, make furnace lining very fast to the reaction of temperature, in the process of body of heater heating-cooling, furnace lining is set up rapidly thermal field and is reached thermal balance, has good energy-saving effect;
5) density of the every layer material of furnace lining of the present invention, intensity and expansion characteristics all pass through to be carefully chosen and configures, the physical and chemical index that often kind of furnace lining material is steady in a long-term under all having different temperatures, the inner various mechanical structure of furnace lining involves into network system, and the intensity of both sides furnace lining clamping plate furnace lining and outer steel shell and heavy castable working lining is far beyond inner furnace lining, the smooth airtight formation heat-reflecting surface of heavy castable working lining side towards the fire makes furnace interior form heat energy gathering center, faced by outer steel shell, the smooth airtight high strength of air makes furnace lining heat energy be closed in furnace lining inside, be conducive to the heating center safeguarding furnace interior burner hearth, improve the smelting efficiency of stove, stove is made to have stronger smelting ability and anti-disaster ability,
6) each furnace lining subregion metal separation backing ring of the present invention or the segmentation of refractory concrete isolation beams are fixed on outer steel shell, intensity is mainly by " the hasp power " between each layer furnace lining material, frictional force, bonding force and lateral pressure provide, the outer steel shell tractive outside little metal anchorage and nonmetal anchoring piece and furnace lining is only had to fix in furnace lining, airtight between every layer, cold and hot dilatancy is little, thus it is thinning at lining thickness, the strength and stability exceeding conventional furnace lining is obtained when weight saving, except furnace binding node and thermal center point, it is ideally adjustable that the exocuticle temperature of outer steel shell remains on environment temperature temperature gap height 60-100 DEG C substantially, this temperature both can keep the thermal field of furnace lining to stablize the heating center maintaining body of heater, effectively can resist the erosion of air for furnace lining outer steel shell again, furnace lining outer steel shell is made to keep long high strength, do not need joining external thermal insulation to outer steel shell outside.
Accompanying drawing explanation
Fig. 1 is facade view of the present invention;
Fig. 2 is furnace lining top view of the present invention;
Reference numeral: 1, outer steel shell, 2, flexible isolating layer, 3, lightweight thermal insulation layer, 4, castable working lining, 5, high-strength dope layer, 601, metal anchorage, 602, nonmetal anchoring piece, 7, metal separation backing ring, 8, refractory concrete isolation beams.
Detailed description of the invention
As shown in the figure, a kind of high-strength climbing prolongs formula double plate shell hasp furnace lining structure, furnace lining is divided into several subregions, the edge of each furnace lining subregion is provided with and is fixed on metal separation backing ring 7 on outer steel shell 1 or refractory concrete isolation beams 8, metal separation backing ring 7 or refractory concrete isolation beams 8 by the weight unloading of this subregion furnace lining on outer steel shell 1; The structure of described each furnace lining subregion is followed successively by flexible isolating layer 2, lightweight thermal insulation layer 3 and castable working lining 4 from outside to inside, wherein, high-strength dope layer 5 is provided with in the both sides of flexible isolating layer 2, flexible isolating layer 2 is fixed with outer steel shell 1 and lightweight thermal insulation layer 3 respectively by the high-strength dope layer 5 of its both sides, two faces that described lightweight thermal insulation layer 3 is relative with castable working lining 4 are the male and fomale(M&F) of shape complementarity, with the hasp fastening structure making lightweight thermal insulation layer 3 and castable working lining 4 form high strength; Some metal anchorages 601 and nonmetal anchoring piece 602 is provided with to carry out anchoring to furnace lining in each furnace lining subregion, one end of metal anchorage 601 and nonmetal anchoring piece 602 is fixed on outer steel shell 1, and the other end is embedded in castable working lining 4 after running through flexible isolating layer 2 and lightweight thermal insulation layer 3;
The high strength hasp fastening structure that described lightweight thermal insulation layer 3 and castable working lining 4 are formed refers to, two faces that lightweight thermal insulation layer 3 and castable working lining 4 contact with each other are equipped with embedding inside each other concavo-convex, to ensure the bond strength of lightweight thermal insulation layer 3 and castable working lining 4;
Described flexible isolating layer 2 is made up of two-layer above flexible laminar's insulation material, and its thickness is 2-4 times of outer steel shell 1 thickness; Described lightweight thermal insulation layer 3 is built by laying bricks or stones by insulation blocks and is formed; The thickness of described castable working lining 4 is less than the thickness of lightweight thermal insulation layer 3, and the thickness of castable working lining 4 is 80-200mm;
Described refractory concrete isolation beams 8 is cast on outer steel shell 1 by refractory material and is formed, and its shape is unrestricted, only isolates furnace lining not affecting in the functional situation of stove;
Described nonmetal anchoring piece 602, the surface along its vertical furnace lining direction has tongue and groove, to strengthen anchor force.
Claims (5)
1. high-strength climbing prolongs formula double plate shell hasp furnace lining structure, it is characterized in that: furnace lining is divided into several subregions, the edge of each furnace lining subregion is provided with and is fixed on metal separation backing ring (7) on outer steel shell (1) or refractory concrete isolation beams (8), metal separation backing ring (7) or refractory concrete isolation beams (8) by the weight unloading of this subregion furnace lining on outer steel shell (1), the structure of described each furnace lining subregion is followed successively by flexible isolating layer (2) from outside to inside, lightweight thermal insulation layer (3) and castable working lining (4), wherein, high-strength dope layer (5) is provided with in the both sides of flexible isolating layer (2), flexible isolating layer (2) is fixed with outer steel shell (1) and lightweight thermal insulation layer (3) respectively by the high-strength dope layer (5) of its both sides, described lightweight thermal insulation layer (3) two faces contacting relative to castable working lining (4) are the male and fomale(M&F) of shape complementarity, with the hasp fastening structure making lightweight thermal insulation layer (3) and castable working lining (4) form high strength, some metal anchorages (601) and nonmetal anchoring piece (602) is provided with to carry out anchoring to furnace lining in each furnace lining subregion, one end of metal anchorage (601) and nonmetal anchoring piece (602) is fixed on outer steel shell (1), and the other end is embedded in castable working lining (4) after running through flexible isolating layer (2) and lightweight thermal insulation layer (3).
2. high-strength the climbing of one according to claim 1 prolongs formula double plate shell hasp furnace lining structure, it is characterized in that: the high strength hasp fastening structure that described lightweight thermal insulation layer (3) and castable working lining (4) are formed refers to, two faces that lightweight thermal insulation layer (3) and castable working lining (4) contact with each other are equipped with embedding inside each other concavo-convex, to ensure the bond strength of lightweight thermal insulation layer (3) and castable working lining (4).
3. high-strength the climbing of one according to claim 1 prolongs formula double plate shell hasp furnace lining structure, it is characterized in that: described flexible isolating layer (2) is made up of two-layer above flexible laminar's insulation material, and its thickness is 2-4 times of outer steel shell (1) thickness; Described lightweight thermal insulation layer (3) is built by laying bricks or stones by insulation blocks and is formed; The thickness of described castable working lining (4) is less than the thickness of lightweight thermal insulation layer (3).
4. high-strength the climbing of the one according to claim 1 or 3 prolongs formula double plate shell hasp furnace lining structure, it is characterized in that: the thickness of described castable working lining (4) is 80-200mm.
5. high-strength the climbing of one according to claim 1 prolongs formula double plate shell hasp furnace lining structure, it is characterized in that: described refractory concrete isolation beams (8) is cast in outer steel shell (1) by refractory material and is above formed, its shape is unrestricted, only isolates furnace lining not affecting in the functional situation of stove.
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| CN201510088962.1A CN104677111A (en) | 2015-02-27 | 2015-02-27 | High-strength climbing type double-splint thin shell buckle lining structure |
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| CN201510088962.1A CN104677111A (en) | 2015-02-27 | 2015-02-27 | High-strength climbing type double-splint thin shell buckle lining structure |
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| CN107166965A (en) * | 2017-07-20 | 2017-09-15 | 洛阳市洛华粉体工程特种耐火材料有限公司 | A kind of multiple hearth furnace castable furnace lining structure |
| CN113736487A (en) * | 2021-09-09 | 2021-12-03 | 中冶焦耐(大连)工程技术有限公司 | Long-life coke oven door |
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| CN113736487A (en) * | 2021-09-09 | 2021-12-03 | 中冶焦耐(大连)工程技术有限公司 | Long-life coke oven door |
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