CN103388055A - Furnace beam and vertical column fire-resistant thermal insulation lining structure of walking beam furnace for heating high-temperature oriented silicon steel and manufacturing method of structure - Google Patents
Furnace beam and vertical column fire-resistant thermal insulation lining structure of walking beam furnace for heating high-temperature oriented silicon steel and manufacturing method of structure Download PDFInfo
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Abstract
The invention discloses a furnace beam and vertical column fire-resistant thermal insulation lining structure of a walking beam furnace for heating high-temperature oriented silicon steel. The furnace beam and vertical column fire-resistant thermal insulation lining structure comprises a metal pipe forming a foundation of a furnace beam or a vertical column, wherein heat-resistant cushion blocks are arranged on the metal pipe forming the foundation of the furnace beam at intervals along the axis direction, metal anchoring parts are uniformly distributed on the outer wall of the metal pipe along the axial direction and the peripheral direction, a fire-resistant insulating layer is formed to cling to the outer wall of the metal pipe in a pouring manner and is combined with the metal anchoring parts, and the fire-resistant insulating layer is sequentially covered by a slag-bonding prevention layer and an anti-oxidation coating. As the heat preservation and slag-bonding prevention double-layer structure and the design of appropriate thickness are adopted by the furnace beam and vertical column fire-resistant thermal insulation lining structure of the walking beam furnace, the integrality of a thermal insulation lining is improved, and the comprehensive usability of the thermal insulation lining is improved.
Description
Technical field
The invention belongs to the process furnace field, specifically a kind of the heating of high temperature oriented silicon steel walking beam furnace stove beam and column refractory heat-insulating lining structure and preparation method thereof.
Technical background
the high magnetic strength of high temperature oriented silicon steel, low core loss property and obtain user's consistent approval, yet, in high temperature oriented silicon steel (HiB steel) production process, in billet step-type heating furnace, Heating temperature is high, time inside furnace is long, cause the interior amount of oxidation loss of steel billet stove large, billet surface iron, the melts that the element silicon oxidation forms constantly trickles to supporting stove beam and column surface and furnace bottom, wherein, flow to the melts of support stove beam by contacting of serving as a contrast with stove beam and column refractory heat-insulating, infiltration forms adhesion, by the physical-chemical reaction between melts and stove beam and column refractory heat-insulating lining and furnace atmosphere, fusing point rises, melts constantly solidifies bonding, dry slag is constantly grown up under action of gravity, and to the furnace bottom direction, stretch, the slag post that forms a large amount of likeness in form icicles hangs, reduce combustion space, process furnace bottom, affect the bottom burner and sprayed flow field and flame profile, the process furnace temperature of lower is reduced, the temperature field ununiformity increases, in order to guarantee the heating steel billet quality, must extend heat-up time or improve Heating temperature, but in the steel billet stove, oxidization burning loss increases, stove beam and the growth of column dross, further worsened the combustion position of process furnace lower space, form vicious cycle, finally because not meeting heating quality and normal production run blowing out scarfing cinder in the steel billet stove, cause the process furnace gas consumption to rise, production efficiency is low, blowing out maintenance cost increase etc., limited the throughput of high temperature oriented silicon steel, improved production cost.This shows, walking beam furnace stove beam and column dross are to affect one of key factor that the high temperature oriented silicon steel is extensive, low-cost, high quality is made.Yet,, for the problem that prevents of stove beam and column dross in high temperature oriented silicon steel heat-processed, yet there are no at present the correlation technique report both at home and abroad.
Stove beam and column are one of important structure of walking beam furnace, and it is not only bearing all wts of blank in stove, and undertaker's material stepped start-stop system important task of advancing, and therefore, guarantee that the mechanical strength under stove beam and column applying working condition condition is most important.in order to prevent strength decreased and distortion under stove beam and column applied at elevated temperature condition, need to carry out cooling to stove beam and column, Major Cooling Methods has water flowing cooling cooling with vaporization, the cooling heat of taking away is 15 ~ 30%, wherein, in water-cooling pattern, water coolant is taken away heat and is difficult to recycle and consume, the heat that in the vaporization type of cooling, steam is taken away can be incorporated into the power networks by steam, generating etc. is recycled, but the heating steel billet net heat is reduced, thereby, the different types of cooling all causes the rising of process furnace steel billet energy consumption, especially the water flowing type of cooling, also cause the thermal pollution of outer water discharge, simultaneously, the cooling temperature that reduces the steel billet lip block of stove beam, cause billet surface water-cooled " black printing ", worsens the heating condition of blank, extended heat-up time, reduced heating quality.in order to improve the heating steel billet quality, reduce the process furnace energy consumption, all adopt refractory materials to carry out heat insulation bundling to heating-furnace beam and column both at home and abroad, main heat shield liner structure has: the integrated poured structure of individual layer refractory castable, refractory castable and refractory fiber blanket bilayer structure and multi-layer refractory fibre blanket structure, wherein, individual layer refractory castable structure is poor because of heat-proof quality, the easy crystallization efflorescence of multi-layer refractory fibre blanket structure and not applying, especially the process furnace of the high temperature oriented silicon steel (HiB steel) of Heating temperature 〉=1380 ℃, can't use due to the restriction of commercially available refractory fibre product maximum operation (service) temperature, thereby, state's internally heated oven all generally adopts refractory castable and refractory fiber blanket bilayer structure at present, especially high temperature oriented silicon steel (HiB steel) process furnace, wherein, internal layer is refractory fiber blanket, skin is refractory castable, strengthen the heat-proof quality of heat shield liner by the internal layer refractory fiber blanket, by outer mould material good resistance to elevated temperatures and mechanical property, improve the resisting breakage ability of heat shield liner, as: in September, 2010, Hu Jianping and brilliant army were in " economic research guide " upper disclose " water beam of walking beam heating furnace utilisation technology ", it has reported refractory fiber blanket and the mullite pouring material double thermal insulation lining structure of 120 tons of/hour two accumulation of heat walking beam furnace horizontal shores of certain steel mill and column, wherein, internal layer refractory fiber blanket thickness is 20mm, outer mould material thickness is 60mm.Publication number is that the Chinese invention patent of CN100494852C discloses " a kind of step heating furnace beam and post and constructional method thereof ", it provides tapetum fibrosum and mould material double thermal insulation lining structure and the constructional method thereof of a kind of step heating furnace beam and post, wherein, outer mould material thickness is 60mm, internal layer refractory fiber blanket thickness is 18 ~ 22mm, realize the combination of heat shield liner and water pipe by being welded on Y shape anchoring piece on water pipe, have advantages of that intensity is high, high temperature resistant, antioxidant property is good, long service life.yet, in the production application process, heating for common steel grade, because Heating temperature is low, time inside furnace is short, billet oxidization is few, oxide compound is the solid oxide iron sheet, reached the purpose that extends heating-furnace beam and column heat shield liner work-ing life, but the heating for the high temperature oriented silicon steel, because Heating temperature is high, time inside furnace is long, billet oxidization is serious, oxide compound is the molten state oxide compound, cause a large amount of dry slags of stove beam and column heat shield liner surface and slag post to hang, finally because meeting the requirement of high temperature oriented silicon steel heating quality, be forced to the blowing out scarfing cinder, simultaneously, abominable heating condition has also promoted the breakage of stove beam and column heat shield liner, blowing out scarfing cinder frequently, aggravated the physical abuse of stove beam and column heat shield liner, cause stove beam and column short work-ing life, maintenance cost sharply rises, process furnace work efficiency significantly descends.Think, stove beam and column heat shield liner structure and material for routine, because outer mould material is easily infiltrated and corrodes by high temperature oriented silicon steel oxidation fusion thing, cause stove beam and column dry slag, because mould material density is large, thermal conductivity is high, the cast bed thickness, affect the integral heat insulation performance of heat shield liner, reduced the heat shield liner surface temperature, caused the oxidation fusion thing that forms in high temperature oriented silicon steel heat-processed to be grown in the formation of stove beam and the surface condensation adhesion of column heat shield liner and dross; In addition, due to the high-temperature shrinkage of refractory fiber blanket and the thermal expansion of refractory castable, cause mould material skin and refractory fiber blanket layer bonding surface to form gap, destroyed the globality of heat shield liner, easily make Y shape anchoring piece high temperature oxidation and the thermal shock be full of cracks of the refractory casting bed of material and structure spalling, not only affected the heat insulation and preservation effect of heating-furnace beam and column heat shield liner, and stove beam and the column cooling heat loss is high, surface temperature reduces, dross is further aggravated.
comprehensively above-mentioned, existing walking beam furnace, it is high-quality and efficient that stove beam and column heat shield liner technology are difficult to meet high temperature oriented silicon steel (HiB steel), the use properties requirement of low-cost heating, be necessary further to carry out the research of walking beam furnace stove beam and column heat shield liner structure, improve thermal and insulating performance and the resisting breakage ability of stove beam and column refractory heat-insulating lining, the dross process of containment stove beam and column, reach and reduce the process furnace energy consumption, extend stove beam and column refractory heat-insulating and serve as a contrast work-ing life, reduce the dross amount, reduce the process furnace maintenance cost, improve the integration objectives such as high temperature oriented silicon steel heating production efficiency.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, provide the heating of a kind of high temperature oriented silicon steel with walking beam furnace stove beam and column refractory heat-insulating lining structure and preparation method thereof, it has been reached reduce stove beam and column cooling heat loss, prolong insulation lining work-ing life, containment stove beam and column dross, improve heating quality in stove, reduction energy consumption and maintenance cost, raising high temperature oriented silicon steel and heat the integration objectives such as production efficiency.
For achieving the above object, a kind of heating of high temperature oriented silicon steel walking beam furnace stove beam and column refractory heat-insulating lining structure that the present invention is designed, comprise the metal tube that forms stove beam or upright post basic, wherein form on the metal tube on stove beam basis and be arranged at intervals with heat-resistant bearer along axis direction, described metal tube outer wall is evenly distributed with metal anchorage along the axial and circumferential directions, be close to the metal tube outer wall and be cast with the refractory insulating layer that is combined as a whole with metal anchorage, the outside of described refractory insulating layer also is coated with antiseized slag blanket and inoxidzable coating successively.
Further, the V-shaped structure of described metal anchorage, its diameter is 6 ~ 8mm, its top is apart from refractory insulating layer outside surface 5 ~ 10mm; Described heat-resistant bearer exceeds inoxidzable coating 20 ~ 40mm.
Again further, described metal anchorage and metal tube surface are coated with organic coating, and the raw materials by weight meter of described organic coating comprises: 95% machine oil, 4% diesel oil and 1% polypropylene powder.
Again further, the thickness of described refractory insulating layer is 65 ~ 75mm, adopts high-strength light insulating refractory casting material casting, and the thickness of described antiseized slag blanket is 5 ~ 15mm, adopt heat shield liner slag adhesion coating manually to smear moulding, described inoxidzable coating is anti-oxidation paint of fireproof carbon-containing materials.
Again further, the raw materials by weight meter of described high-strength light insulating refractory casting material comprises: 30 ~ 40% light-weight mullite aggregate, 5 ~ 10% aluminium riched spinel hollow ball, 5 ~ 8% andaluzite, 6 ~ 9% aluminium riched spinel powder, 5 ~ 7% aquamaine stone flour, 5 ~ 8% silicon powder, ρ-Al of 5 ~ 10%
2O
3Micro mist, 12 ~ 18% pure calcium aluminate cement, 3 ~ 6% refractory fibre, 0.05 ~ 0.15% Sodium hexametaphosphate 99, organic water reducer of 0.05 ~ 0.15%, 0.04 ~ 0.07% organo-silicon coupling agent and 0.01 ~ 0.02% defoamer.
Again further, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 0 ~ 80% and 20 ~ 100%;
Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm;
Described andaluzite granularity is 0.1 ~ 1mm; Described organic water reducer is that FS20 refractory castable water reducer, described silane coupling agent are that the granularity of soluble silane coupling agent, described aquamaine stone flour is 60 ~ 120 orders.
Again further, the raw materials by weight meter of described slag adhesion coating comprises: 55 ~ 60% bauxite chamotte, 5 ~ 10% magnesium-aluminium spinel, 5 ~ 10% calcined anthracite, 2 ~ 5% crystalline flake graphite, 3 ~ 6% silicon carbide, 4 ~ 6% α-Α l
2O
3Micro mist, 4 ~ 6% silicon powder, 5 ~ 7% pure calcium aluminate cement, 0.5 ~ 1.5% metallic silicon power, 2.5 ~ 3.5% water-soluble epoxy resin and water soluble solid agent, 0.05 ~ 0.10% explosion-proof fiber, 0.1 ~ 0.15% Sodium hexametaphosphate 99, organic water reducer of 0.05 ~ 0.10% and 0.04 ~ 0.07% organo-silicon coupling agent.
Again further, Al in described bauxite chamotte
2O
3Content 〉=85%, it is to form greater than 1mm and less than or equal to two kinds of grain compositions of 3mm and 0.1 ~ 1 by granularity, its two kinds of weight percentages are respectively 0 ~ 80% and 20 ~ 100%; The Al of described magnesium-aluminium spinel
2O
3Content is 73 ± 1%, granularity≤0.088mm;
Described calcined anthracite granularity is 0.5 ~ 3mm; Described crystalline flake graphite granularity≤0.074mm; Carborundum granularity≤0.088mm, SiC content 〉=95%; Metallic silicon power granularity≤0.088mm;
In described water-soluble epoxy resin and water soluble solid agent, water-soluble epoxy resin and water soluble solid agent weight ratio are=5.1 ~ 5.5 ︰ 1;
Described organic water reducer is FS20 refractory castable water reducer;
Described silane coupling agent is the soluble silane coupling agent.
Again further, also be coated with on described refractory insulating layer and antiseized slag blanket bonding interface and be brushed with the soluble silane coupling agent.
The present invention also provides the preparation method of a kind of high temperature oriented silicon steel heating with walking beam furnace stove beam and column refractory heat-insulating lining structure, comprises the following steps:
1) after metal tube and heat-resistant bearer installation, with floating dust, iron rust and the welding slag of steel brush cleaning metal tube surface;
2) along metal tube axial and circumferential distribution welding metal anchoring piece, and metal anchorage is vertical with the metal tube axis;
3) adopt organic coating paint metals pipe and metal anchorage surface, with pressurized air, dry up;
4) at metal tube overcoat mold and fixing;
5) cast heat insulation layer;
6) heat insulation layer casting demoulding after 24 hours;
7) with steel brush bristle heat insulation layer surface, after blowing off surperficial floating dust, brushing soluble silane coupling agent, dry up with pressurized air;
8) manually smear the antiseized slag blanket of preparation at heat insulation layer outside surface, control even thickness, the smooth surface of antiseized slag blanket;
9) after antiseized slag blanket is smeared construction, maintenance is more than 24 hours;
10) the antioxidizing paint brushing is adopted on antiseized slag blanket surface, formed inoxidzable coating, after this technique is toasted routinely.
The present invention also provides the preparation method of a kind of high temperature oriented silicon steel heating with walking beam furnace stove beam and column refractory heat-insulating lining structure, comprises the following steps:
1) after stove beam and column metal tube and heat-resistant bearer installation, with floating dust, iron rust and the welding slag of steel brush cleaning metal tube surface;
2) along stove beam and column metal tube axial distribution welding metal anchoring piece, and vertical with stove beam or column metal tube axis,
3) adopt organic coating brushing stove beam or column metal tube and metal anchorage surface, with pressurized air, dry up;
4) at stove beam or column metal tube overcoat mold and fixing;
5) thermal insulation layer is poured into a mould;
6) thermal insulation layer casting demoulding after 24 hours;
7), with steel brush bristle insulation layer surface, after blowing off surperficial floating dust, brush water-soluble WD-10 silane coupling agent, with pressurized air, dry up;
8) manually smear the antiseized slag blanket of preparation at the thermal insulation layer outside surface, control even thickness, the smooth surface of antiseized slag blanket;
9) antiseized slag blanket is smeared the rear maintenance of construction 24 hours;
10) adopt antioxidizing paint to brush on antiseized slag blanket surface, prepare inoxidzable coating, after this, technique is toasted and is gone into operation routinely.
Advantage of the present invention is as follows:
1, walking beam furnace stove beam of the present invention and column refractory heat-insulating lining adopt the design of thermal insulation layer and antiseized slag blanket bilayer structure and suitable thickness thereof, strengthen the globality of heat shield liner, have improved its Integrated using performance;
Wherein, (a) the thickness setting of high-strength light mullite flame-proof mould material thermal insulation layer and rational behavior determines, high-temperature behavior and the thermal shock resistance of heat shield liner have been improved, guarantee combining closely and himself bonding strength of thermal insulation layer and Lu Liang, column metal tube, improved insulation reliability and structural stability and the resisting breakage ability of thermal insulation layer
(b) the thickness setting of the antiseized slag blanket of carbon containing unshape refractory and rational behavior determines, isolated contacting of oxidation fusion thing and porous light high-strength mullite flame-proof mould material thermal insulation layer, and be melted in its difficulty under the effect of thing infiltration, surperficial dry slag and the dross of containment smear layer, extend the single heating furnace high-temperature oriented silicon steel production time in cycle;
2, the present invention is by the water-soluble WD-10 silane coupling agent of brushing Wuhan temmoku development in science and technology limited liability company production on thermal insulation layer and antiseized slag blanket bonding interface, strengthen the interface bond strength of thermal insulation layer and slag adhesion interlayer, improve the globality of stove beam and column heat shield liner;
3, v-shaped structure metal anchorage design in the present invention, scantlings of the structure selected and along stove beam or column outer surface of metal pipe axial distribution welding decoration form, enlarged the anchorage zone of metal anchorage, controlled the metal anchorage thermal expansion amount, improved the homogeneity that heat shield liner anchorage effect power distributes, strengthened the bonding strength between heat shield liner and stove beam or column metal tube, simultaneously, the employing of anchoring piece Cr25Ni20 heat-resistance stainless steel material, improve the pyro-oxidation resistance of metal anchorage, extended the effective acting time of metal anchorage;
4, the present invention is smearing organic coating at metal anchorage and stove beam or column metal tube surface, slowed down in thermal insulation layer casting and maintenance processes the corrosion to metallic surface, and in the heat shield liner bake process, the volatilization of organic coating and carbonization, form tiny gap between thermal insulation layer and metal anchorage and stove beam or column metal tube, hot expansibility difference between buffering thermal insulation layer refractory materials and metal anchorage and stove beam or column metal tube metallic substance, the crack due to thermal stress of avoiding hot expansibility difference to cause is damaged, further improve comprehensive integral and the structural stability of heat shield liner,
5, the present invention arranges inoxidzable coating on antiseized slag blanket surface, has contained oxidation and the decarburization of antiseized slag blanket in process furnace baker process, extends the effective acting time of antiseized slag blanket, improves the slag adhesion effect;
In addition, stove beam provided by the invention and column heat shield liner preparation method, thermal insulation layer in the heat shield liner, antiseized slag blanket, the correct construction of metal anchorage, comprehensive integral have been guaranteed, make each assembly give full play to separately use function, finally realize the Integrated using performance of heat shield liner, reach and reduce stove beam and column cooling heat loss, prolong insulation lining work-ing life, containment stove beam and column dross, improve heating quality in stove, reduce energy consumption and maintenance cost, raising high temperature oriented silicon steel heat the integration objectives such as production efficiency.
Description of drawings
Fig. 1 is stove beam heat shield liner structure longitudinal sectional drawing of the present invention
Fig. 2 is the A-A sectional view in Fig. 1
Fig. 3 is column heat shield liner structure longitudinal sectional drawing of the present invention
Fig. 4 is the B-B sectional view in Fig. 3
In figure: thermal insulation layer 1, antiseized slag blanket 2, metal anchorage 3, heat-resistant bearer 4, stove beam or column metal tube 5, inoxidzable coating 6.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1
A kind of heating of high temperature oriented silicon steel walking beam furnace stove beam and column refractory heat-insulating lining structure, comprise the metal tube 5 that forms stove beam or upright post basic, wherein form on the metal tube 5 on stove beam basis and be arranged at intervals with heat-resistant bearer 4 along axis direction, metal tube 5 outer walls are evenly distributed with metal anchorage 3 along the axial and circumferential directions, be close to metal tube 5 outer walls and be cast with the refractory insulating layer 1 that is combined as a whole with metal anchorage 3, the outside of refractory insulating layer 1 also is coated with antiseized slag blanket 2 and inoxidzable coating 6 successively.
The V-shaped structure of metal anchorage 3, its diameter are 6 ~ 8mm, and its top is apart from refractory insulating layer 1 outside surface 5 ~ 10mm; Described heat-resistant bearer 4 is than the high 20 ~ 40mm of inoxidzable coating 6.
Described metal anchorage 3 and metal tube 5 surfaces are coated with organic coating, and the raw materials by weight meter of described organic coating comprises: 95% machine oil, 4% diesel oil and 1% polypropylene powder.This organic coating formula has report in publication number is the Chinese invention patent " novel heat insulation protective layer structure of furnace roller and preparation method thereof " of CN101660038A.Inoxidzable coating 6 is commercially available anti-oxidation paint of fireproof carbon-containing materials.
Wherein, the high-strength light insulating refractory casting material, its raw materials by weight meter comprises: 40% light-weight mullite aggregate, 5% aluminium riched spinel hollow ball, 8% andaluzite, 6% aluminium riched spinel powder, 7% aquamaine stone flour, 7.71% silicon powder, ρ-Al of 5%
2O
3Micro mist, 18% pure calcium aluminate cement, 3% refractory fibre, 0.15% Sodium hexametaphosphate 99,0.05% FS20 refractory castable water reducer, 0.07% water-soluble WD-10 silane coupling agent and 0.02% defoamer.
The Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 50% and 50%; Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
High temperature walking beam furnace stove beam and column heat shield liner slag adhesion coating, its raw materials by weight meter comprises:
55% bauxite chamotte, 8.71% magnesium-aluminium spinel, 10% calcined anthracite, 2% crystalline flake graphite, 6% silicon carbide, α-Al of 4%
2O
3Micro mist, 4% silicon powder, 7% pure calcium aluminate cement, 0.5% metallic silicon power, 2.5% water-soluble epoxy resin and water soluble solid agent, 0.05% explosion-proof fiber, 0.1% Sodium hexametaphosphate 99,0.1% FS20 refractory castable water reducer and 0.04% water-soluble WD-10 silane coupling agent.
Al in described bauxite chamotte
2O
3Content 〉=85%, it is to form greater than 1mm and less than or equal to two kinds of grain compositions of 3mm and 0.1 ~ 1 by granularity, its two kinds of weight percentages are respectively 50% and 50%, the Al of described magnesium-aluminium spinel
2O
3Content is 73 ± 1%, granularity≤0.088mm.Described calcined anthracite granularity is 0.5 ~ 3mm.
Described crystalline flake graphite granularity≤0.074mm; Carborundum granularity≤0.088mm, SiC content 〉=95%; Metallic silicon power granularity≤0.088mm.In described water-soluble epoxy resin and water soluble solid agent, water-soluble epoxy resin and water soluble solid agent weight ratio are=5.1 ︰ 1.
In the present embodiment, the heating of high temperature oriented silicon steel uses walking beam furnace stove beam identical with embodiment 1 with column refractory heat-insulating lining structure, and difference is:
The high-strength light insulating refractory casting material, its raw materials by weight meter comprises:
35% light-weight mullite aggregate, 10% aluminium riched spinel hollow ball, 5% andaluzite, 8.75% aluminium riched spinel powder, 5% aquamaine stone flour, 8% silicon powder, ρ-Al of 10%
2O
3Micro mist, 12% pure calcium aluminate cement, 6% refractory fibre, 0.05% Sodium hexametaphosphate 99,0.15% FS20 refractory castable water reducer, 0.04% water-soluble WD-10 silane coupling agent and 0.01% defoamer.
Wherein, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 80% and 20%; Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
High temperature walking beam furnace stove beam and column heat shield liner slag adhesion coating, its raw materials by weight meter comprises:
55% bauxite chamotte, 7.13% magnesium-aluminium spinel, 8% calcined anthracite, 5% crystalline flake graphite, 3% silicon carbide, α-Al of 6%
2O
3Micro mist, 6% silicon powder, 5% pure calcium aluminate cement, 1% metallic silicon power, 3.5% water-soluble epoxy resin and water soluble solid agent, 0.1% explosion-proof fiber, 0.15% Sodium hexametaphosphate 99,0.05% FS20 refractory castable water reducer and 0.07% water-soluble WD-10 silane coupling agent.
Wherein, Al in described bauxite chamotte
2O
3Content 〉=85%, it is to form greater than 1mm and less than or equal to two kinds of grain compositions of 3mm and 0.1 ~ 1 by granularity, its two kinds of weight percentages are respectively 80% and 20%, the Al of described magnesium-aluminium spinel
2O
3Content is 73 ± 1%, granularity≤0.088mm.Described calcined anthracite granularity is 0.5 ~ 3mm.
Described crystalline flake graphite granularity≤0.074mm; Carborundum granularity≤0.088mm, SiC content 〉=95%; Metallic silicon power granularity≤0.088mm.In described water-soluble epoxy resin and water soluble solid agent, water-soluble epoxy resin and water soluble solid agent weight ratio are=5.5 ︰ 1.
In the present embodiment, the heating of high temperature oriented silicon steel uses walking beam furnace stove beam identical with embodiment 1 with column refractory heat-insulating lining structure, and difference is:
A kind of high-strength light insulating refractory casting material, its raw materials by weight meter comprises:
35% light-weight mullite aggregate, 10% aluminium riched spinel hollow ball, 8% andaluzite, 5% aluminium riched spinel powder, 6% aquamaine stone flour, 7% silicon powder, ρ-Al of 8%
2O
3Micro mist, 16% pure calcium aluminate cement, 4.74% refractory fibre, 0.1% Sodium hexametaphosphate 99,0.1% FS20 refractory castable water reducer, 0.045% water-soluble WD-10 silane coupling agent and 0.015% defoamer.
Wherein, the Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, the grain composition that is 1 ~ 3mm by granularity forms, and described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm; Described andaluzite granularity is 0.1 ~ 1mm; The granularity of described aquamaine stone flour is 60 ~ 120 orders.
High temperature walking beam furnace stove beam and column heat shield liner slag adhesion coating, its raw materials by weight meter comprises:
60% bauxite chamotte, 5.12% magnesium-aluminium spinel, 5% calcined anthracite, 4% crystalline flake graphite, 5% silicon carbide, α-Al of 5%
2O
3Micro mist, 5% silicon powder, 6% pure calcium aluminate cement, 1.5% metallic silicon power, 3% water-soluble epoxy resin and water soluble solid agent, 0.1% explosion-proof fiber, 0.15% Sodium hexametaphosphate 99,0.08% FS20 refractory castable water reducer and 0.05% water-soluble WD-10 silane coupling agent.
Wherein, Al in described bauxite chamotte
2O
3Content 〉=85%, its grain composition that is 0.1 ~ 1 by granularity forms, the Al of described magnesium-aluminium spinel
2O
3Content is 73 ± 1%, granularity≤0.088mm.Described calcined anthracite granularity is 0.5 ~ 3mm.
Described crystalline flake graphite granularity≤0.074mm; Carborundum granularity≤0.088mm, SiC content 〉=95%; Metallic silicon power granularity≤0.088mm.In described water-soluble epoxy resin and water soluble solid agent, water-soluble epoxy resin and water soluble solid agent weight ratio are=5.2 ︰ 1.
Material in embodiment 1 ~ 3 is all that market can be bought.
Claims (10)
1. a high temperature oriented silicon steel heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, comprise the metal tube (5) that forms stove beam or upright post basic, the metal tube (5) that wherein forms stove beam basis upward is arranged at intervals with heat-resistant bearer (4) along axis direction, described metal tube (5) outer wall is evenly distributed with metal anchorage (3) along the axial and circumferential directions, be close to metal tube (5) outer wall and be cast with the refractory insulating layer (1) that is combined as a whole with metal anchorage (3), it is characterized in that: the outside of described refractory insulating layer (1) also is coated with antiseized slag blanket (2) and inoxidzable coating (6) successively.
2. high temperature oriented silicon steel according to claim 1 heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, it is characterized in that: the V-shaped structure of described metal anchorage (3), its diameter is 6 ~ 8mm, and its top is apart from refractory insulating layer (1) outside surface 5 ~ 10mm; Described heat-resistant bearer (4) exceeds inoxidzable coating (6) 20 ~ 40mm.
3. high temperature oriented silicon steel according to claim 1 and 2 heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, it is characterized in that: described metal anchorage (3) and metal tube (5) surface are coated with organic coating, and the raw materials by weight meter of described organic coating comprises: 95% machine oil, 4% diesel oil and 1% polypropylene powder.
4. high temperature oriented silicon steel according to claim 1 and 2 heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, it is characterized in that: the thickness of described refractory insulating layer (1) is 65 ~ 75mm, adopt high-strength light insulating refractory casting material casting, the thickness of described antiseized slag blanket (2) is 5 ~ 15mm, adopt heat shield liner slag adhesion coating manually to smear moulding, described inoxidzable coating (6) is anti-oxidation paint of fireproof carbon-containing materials.
5. high temperature oriented silicon steel according to claim 4 heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, and it is characterized in that: the raw materials by weight meter of described high-strength light insulating refractory casting material comprises: 30 ~ 40% light-weight mullite aggregate, 5 ~ 10% aluminium riched spinel hollow ball, 5 ~ 8% andaluzite, 6 ~ 9% aluminium riched spinel powder, 5 ~ 7% aquamaine stone flour, 5 ~ 8% silicon powder, ρ-Al of 5 ~ 10%
2O
3Micro mist, 12 ~ 18% pure calcium aluminate cement, 3 ~ 6% refractory fibre, 0.05 ~ 0.15% Sodium hexametaphosphate 99, organic water reducer of 0.05 ~ 0.15%, 0.04 ~ 0.07% organo-silicon coupling agent and 0.01 ~ 0.02% defoamer.
6. high temperature oriented silicon steel according to claim 5 heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, it is characterized in that:
The Al of described light-weight mullite aggregate
2O
3Content 〉=60%, 1 ~ 5mm packing density of particle≤1.0g/cm
3, be to form greater than 3mm and less than or equal to two kinds of grain compositions of 5mm and 1 ~ 3mm by granularity, its two kinds of particle level weight percents are respectively 0 ~ 80% and 20 ~ 100%;
Described aluminium riched spinel hollow ball granularity is 3 ~ 0.2mm, tap density≤1.0g/cm
3, aluminium riched spinel Powder Particle Size≤0.044mm;
Described andaluzite granularity is 0.1 ~ 1mm; Described organic water reducer is that FS20 refractory castable water reducer, described silane coupling agent are that the granularity of soluble silane coupling agent, described aquamaine stone flour is 60 ~ 120 orders.
7. high temperature oriented silicon steel according to claim 4 heating is with walking beam furnace stove beam and column refractory heat-insulating lining structure, and it is characterized in that: the raw materials by weight meter of described slag adhesion coating comprises: 55 ~ 60% bauxite chamotte, 5 ~ 10% magnesium-aluminium spinel, 5 ~ 10% calcined anthracite, 2 ~ 5% crystalline flake graphite, 3 ~ 6% silicon carbide, 4 ~ 6% α-Α l
2O
3Micro mist, 4 ~ 6% silicon powder, 5 ~ 7% pure calcium aluminate cement, 0.5 ~ 1.5% metallic silicon power, 2.5 ~ 3.5% water-soluble epoxy resin and water soluble solid agent, 0.05 ~ 0.10% explosion-proof fiber, 0.1 ~ 0.15% Sodium hexametaphosphate 99, organic water reducer of 0.05 ~ 0.10% and 0.04 ~ 0.07% organo-silicon coupling agent.
8. high temperature oriented silicon steel according to claim 7 heats with walking beam furnace stove beam and column refractory heat-insulating lining structure, it is characterized in that:
Al in described bauxite chamotte
2O
3Content 〉=85%, it is to form greater than 1mm and less than or equal to two kinds of grain compositions of 3mm and 0.1 ~ 1 by granularity, its two kinds of weight percentages are respectively 0 ~ 80% and 20 ~ 100%; The Al of described magnesium-aluminium spinel
2O
3Content is 73 ± 1%, granularity≤0.088mm;
Described calcined anthracite granularity is 0.5 ~ 3mm; Described crystalline flake graphite granularity≤0.074mm; Carborundum granularity≤0.088mm, SiC content 〉=95%; Metallic silicon power granularity≤0.088mm;
In described water-soluble epoxy resin and water soluble solid agent, water-soluble epoxy resin and water soluble solid agent weight ratio are=5.1 ~ 5.5 ︰ 1;
Described organic water reducer is FS20 refractory castable water reducer;
Described silane coupling agent is the soluble silane coupling agent.
9. high temperature oriented silicon steel heating according to claim 1 and 2, with walking beam furnace stove beam and column refractory heat-insulating lining structure, is characterized in that: also be coated with and be brushed with the soluble silane coupling agent on described refractory insulating layer (1) and antiseized slag blanket (2) bonding interface.
10. a high temperature oriented silicon steel heats the preparation method who uses walking beam furnace stove beam and column refractory heat-insulating lining structure, comprises the following steps:
1) after metal tube (5) and heat-resistant bearer (4) installation, clear up floating dust, iron rust and the welding slag on metal tube (5) surface with steel brush;
2) along metal tube (5) axial and circumferential distribution welding metal anchoring piece (3), and metal anchorage (3) is vertical with metal tube (5) axis;
3) adopt organic coating paint metals pipe (5) and metal anchorage (3) surface, with pressurized air, dry up;
4) at metal tube (5) overcoat mold and fixing;
5) cast heat insulation layer (1);
6) heat insulation layer (1) casting demoulding after 24 hours;
7) with steel brush bristle heat insulation layer (1) surface, after blowing off surperficial floating dust, brushing soluble silane coupling agent, dry up with pressurized air;
8) manually smear preparation antiseized slag blanket (2) at heat insulation layer (1) outside surface, control even thickness, the smooth surface of antiseized slag blanket (2);
9) after antiseized slag blanket (2) is smeared construction, maintenance is more than 24 hours;
10) the antioxidizing paint brushing is adopted on antiseized slag blanket (2) surface, formed inoxidzable coating (6), after this technique is toasted routinely.
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