CN105481408A - Composite refractory brick - Google Patents
Composite refractory brick Download PDFInfo
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- CN105481408A CN105481408A CN201610013996.9A CN201610013996A CN105481408A CN 105481408 A CN105481408 A CN 105481408A CN 201610013996 A CN201610013996 A CN 201610013996A CN 105481408 A CN105481408 A CN 105481408A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/449—Organic acids, e.g. EDTA, citrate, acetate, oxalate
Abstract
The invention relates to a composite refractory brick which comprises a high-weight flame-retardant layer and a low-weight heat-preservation layer. The high-weight flame-retardant layer is prepared from, by weight, 20-50% of white fused corundum, 10-30% of fused mullite, 10-25% of andalusite, 10-20% of silicon carbide, 6-15% of argil, 4-10% of alumina powder, 3-6% of calcium lignosulphonate, 1-3% of yellow dextrin and 1-4% of ganister sand. The light-weight heat-preservation layer is prepared from, by weight, 8-30% of white fused corundum, 9-25% of fused mullite, 4-15% of andalusite, 10-20% of silicon carbide, 6-15% of argil, 4-10% of alumina powder, 3-6% of calcium lignosulphonate, 1-3% of yellow dextrin and 1-4% of silica powder, and is further prepared from, by weight, 15-25% of ignition lost pore-forming agent. The invention further relates to a production process of the composite refractory brick. The method includes the steps of raw material processing, material preparing, mulling, forming, drying, firing, inspecting and finished product storing. By means of the composite refractory brick and the production process of the composite refractory brick, the problem that due to the difference of material components, combination faces are prone to breakage is solved.
Description
Technical field
The present invention relates to fire resisting material field, particularly relate to a kind of composite refractory brick.
Background technology
China's Economic development is rapid, and the development of Energy production relatively lags behind many.China's economy keeps the rate of growth of 9% for a long time, and disposable Energy production amount rate of increase then only remains on about 4%.It is energy-conservation for solving another way of energy starved, namely reduces thermosteresis, improves the utilising efficiency of heat energy, reduce energy dissipation.Energy conservation project be considered as in the world " the 5th energy ", its meaning is very important.Calculate according to national departments concerned, all kinds of kiln of China and heat supply pipeline are not good at owing to being incubated, and annual thermosteresis amounts to mark about 3000 ~ 4,000 ten thousand tons, coal.Adopt novel heat insulation technology and equipment to transform, it is completely possible for making these kilns and heat supply pipeline reduce thermosteresis 20 ~ 30%, and this will make China save mark 600 ~ 8,000,000 tons, coal every year.
The accumulation of heat of liner of industry kiln thermal insulation material and heat lost by radiation generally account for 20 ~ 45% of Industrial Stoves total energy consumption.Traditional industry stove is the object reaching heat preservation energy-saving, usually to construct external increase thermal insulation layer at heavy refractory brick marshalling or heavy unshape refractory.Due to the two-layer masonry of needs, cause the time of construction and expense to increase, and kiln volume become huge, heavy.
Application number disclosed in 25 days March in 2015 be 201420551368.2 utility model disclose a kind of compound firebrick structure, by machicolated form bonding surface, heavy material thermofin and light material thermal insulation layer are combined, same masonry achieves heat insulation and insulation effect, decrease time and the expense of construction, also make kiln body to become both bulk.But such combination, because two composition of layer are different, its Thermal Contraction Coefficient difference is comparatively large, easily causes bonding surface to rupture, easily occurs accident, be also unfavorable for that the continuous seepage of factory obtains its maximum economic benefit in using.
Summary of the invention
The object of the invention is for the deficiencies in the prior art part, overcome the problem causing bonding surface easy fracture because material composition is different, a kind of composite refractory brick is provided.
A kind of composite refractory brick, comprises heavy flame retardant coating and lightweight thermal insulation layer.The material of described heavy flame retardant coating and the main raw of lightweight thermal insulation layer completely the same, described heavy flame retardant coating comprises: fused white corundum 20wt% ~ 50wt%, electrofused mullite 10wt% ~ 30wt%, andaluzite 10wt% ~ 25wt%, silicon carbide 10wt% ~ 20wt%, potter's clay 6wt% ~ 15wt%, aluminum oxide powder 4wt% ~ 10wt%, wooden calcium 3wt% ~ 6wt%, yellow starch gum 1wt% ~ 3wt%, silica flour 1wt% ~ 4wt%; Described lightweight thermal insulation layer mainly comprises: fused white corundum 8wt% ~ 30wt%, electrofused mullite 9wt% ~ 25wt%, andaluzite 4wt% ~ 15wt%, silicon carbide 10wt% ~ 20wt%, potter's clay 6wt% ~ 15wt%, aluminum oxide powder 4wt% ~ 10wt%, wooden calcium 3wt% ~ 6wt%, yellow starch gum 1wt% ~ 3wt%, silica flour 1wt% ~ 4wt%; The burning that described lightweight thermal insulation layer also comprises 15wt% ~ 25wt% loses pore-forming material; The thickness proportion of described heavy flame retardant coating and lightweight thermal insulation layer is 1 ~ 2:3 ~ 4.
As improvement, described silica flour is metallurgy one-level, silicone content >=98.5%; Granularity≤0.8 μm of described silica flour.
As improvement, the granularity of described aluminum oxide powder is 10 ~ 20 μm.
As improvement, described burning mistake pore-forming material is the mixture of one or more in wood chip, rice husk or polystyrene spheres; Described particle diameter≤the 3.0mm burning mistake pore-forming material.
As improvement, described heavy flame retardant coating and lightweight thermal insulation layer combine with up-down structure.
As improvement, described heavy flame retardant coating and lightweight thermal insulation layer combine with tiled configuration.
Beneficial effect of the present invention:
(1) the invention provides a kind of composite refractory brick, due to its heavy flame retardant coating and common heavy refractory brick similar nature, possess the advantage of common heavy refractory brick resistance to erosion, high temperature resistant, corrosion-resistant and heat shock resistance.
(2) the invention provides a kind of composite refractory brick, lose pore-forming material due to the burning added in its lightweight thermal insulation layer and can burn mistake in temperature higher than when 1000 degrees Celsius, and in composite refractory brick sintering process firing temperature far above 1000 degrees Celsius, so in described lightweight thermal insulation layer owing to there is pore small in a large number, its thermal conductivity is reduced greatly, possesses the advantage of common thermal insulation layer insulation.
(3) the invention provides a kind of composite refractory brick, owing to wherein adding silicon carbide, and the infrared radiation property of silicon carbide is superior, make composite refractory brick can utilize the principle of infrared radiation more effectively under high-temperature work environment and heat the heated material in kiln uniformly, the received heat of composite refractory brick can be reduced simultaneously; Silica flour in composite refractory brick effectively can avoid silicon carbide to decompose under high temperature and well-oxygenated environment as reductive agent, reduces its infrared radiation property.
(4) the invention provides a kind of composite refractory brick, because its heavy flame retardant coating is consistent with lightweight thermal insulation layer basis material, make its Thermal Contraction Coefficient close, and at high temperature, burning the mistake of mistake pore-forming material burning makes materials at two layers identical, and its Thermal Contraction Coefficient is more close, under making working order, stress between two layer components becomes very little, and bonding surface combines and firmly not easily occurs the problem that bonding surface ruptures.
(5) the invention provides a kind of composite refractory brick, because it possesses effect that is heat insulation and insulation simultaneously, make only to need one deck masonry when using and construct, reduce time and the expense of construction, also save material and resource, reduce discharge, accumulation of heat and the heat lost by radiation of Industrial Stoves can also be reduced simultaneously further.
(6) the invention provides a kind of composite refractory brick, lose pore-forming material owing to adding to burn, the cost of 15% can be reduced relative to common same material heavy refractory brick.
Another object of the present invention is for the deficiencies in the prior art part, overcomes the problem causing bonding surface easy fracture because material composition is different, provides a kind of production technique of composite refractory brick.
A production technique for composite refractory brick, comprising: Raw material processing-prepare burden-mix-shaping-drying-burn till-check-finished product warehouse-in, is characterized in that:
A., in proportioning process, comprise the batching of heavy flame retardant coating and the batching of lightweight thermal insulation layer, heavy flame retardant coating and lightweight thermal insulation layer are separately prepared burden separately; Described heavy flame retardant coating comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer also comprises burning and loses pore-forming material;
B. mix in technique, the heavy flame retardant coating completing proportioning process is separately stirred separately with the lightweight thermal insulation layer completing proportioning process;
C., in moulding process, by passing through the heavy flame retardant coating of technique of mixing and being pressed into one through the lightweight thermal insulation layer of calendering process, between heavy flame retardant coating and lightweight thermal insulation layer, contact surface is formed;
D. in drying process, described drying process is divided into two stages, and the first stage is that the demoulding is dry, and drying temperature is 50 DEG C, and time of drying is 20h; Subordinate phase is forced drying, and drying temperature is 100 DEG C, and time of drying is 15h, and after dry, raw brick moisture content mass content controls below 6%;
E. in firing process, the composite refractory brick completing drying process is loaded high temperature kiln, is heated to 1500 DEG C from normal temperature, insulation 7h, completes firing process, and meanwhile, burning mistake pore-forming material burns to lose and forms a large amount of Minute pores.
As improvement, described heavy flame retardant coating and lightweight thermal insulation layer combine with up-down structure.
As improvement, described heavy flame retardant coating and lightweight thermal insulation layer combine with tiled configuration.
As improvement, described heavy flame retardant coating and lightweight thermal insulation layer are once pressed into one, and pressing pressure is 3.2 ~ 3.6t, and compacting number of times is 4 ~ 6 times.
Beneficial effect of the present invention:
(1) the invention provides a kind of production technique of composite refractory brick, due to its heavy flame retardant coating and common heavy refractory brick similar nature, possess the advantage of common heavy refractory brick resistance to erosion, high temperature resistant, corrosion-resistant and heat shock resistance.Simultaneously, lose pore-forming material due to the burning added in its lightweight thermal insulation layer and can burn mistake in temperature higher than when 1000 degrees Celsius, and in composite refractory brick sintering process firing temperature far above 1000 degrees Celsius, so in described lightweight thermal insulation layer owing to there is pore small in a large number, its heat conductivility is reduced greatly, possesses the advantage of common thermal insulation layer insulation.Like this, the composite refractory brick utilizing the production technique of described a kind of composite refractory brick to manufacture possesses effect that is heat insulation and insulation simultaneously, make only to need one deck masonry when using and construct, reduce time and the expense of construction, also save material and resource, reduce discharge, accumulation of heat and the heat lost by radiation of Industrial Stoves can also be reduced simultaneously further.
(2) the invention provides a kind of production technique of composite refractory brick, because its heavy flame retardant coating is consistent with lightweight thermal insulation layer basis material, make its Thermal Contraction Coefficient close, and after firing process, burning the mistake of mistake pore-forming material burning makes materials at two layers identical, and its Thermal Contraction Coefficient is more close, under making working order, stress between two layer components becomes very little, and bonding surface combines and firmly not easily occurs the problem that bonding surface ruptures.
(3) the invention provides a kind of production technique of composite refractory brick, lose pore-forming material owing to adding to burn, the cost of 15% can be reduced relative to common same material heavy refractory brick.
(4) the invention provides a kind of production technique of composite refractory brick, because drying process in the present invention adopts two stages to carry out drying, the first demoulding is dry, this stage raw brick moisture content is large, need bake out temperature be controlled, prevent moisture from sharply discharging and causing adobe to occur crackle, then forced drying, control base substrate moisture and reach requirement, to ensure the quality sintering rear product.The time of the drying of the demoulding is simultaneously 20h, makes bonding surface that this for some time can be utilized to carry out the infiltration between molecule and spread with the bonding strength strengthening bonding surface further.
Accompanying drawing explanation
In order to clearer explanation technical scheme of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing described below is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is composite fire brick structure A schematic diagram.
Fig. 2 is composite fire brick structure B schematic diagram.
Fig. 3 is composite refractory brick zig-zag bonding surface schematic shapes.
Fig. 4 is composite refractory brick machicolated form bonding surface schematic shapes.
Fig. 5 is composite refractory brick sectional view.
Label declaration:
1. heavy flame retardant coating, 2. lightweight thermal insulation layer, 3. bonding surface.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is illustrated clearly and completely.
Embodiment one
Fig. 1 is composite fire brick structure A schematic diagram.As shown in Figure 1, in the present embodiment, provide a kind of composite refractory brick, comprise heavy flame retardant coating 1 and lightweight thermal insulation layer 2; Described heavy flame retardant coating 1 comprises: fused white corundum 50wt%, electrofused mullite 15wt%, andaluzite 10wt%, silicon carbide 10wt%, potter's clay 6wt%, aluminum oxide powder 4wt%, wooden calcium 3wt%, yellow starch gum 1wt%, silica flour 1wt%; Described lightweight thermal insulation layer 2 comprises: fused white corundum 30wt%, electrofused mullite 9wt%, andaluzite 15wt%, silicon carbide 15wt%, potter's clay 6wt%, aluminum oxide powder 4wt%, wooden calcium 3wt%, yellow starch gum 1wt%, silica flour 2wt%; The burning that described lightweight thermal insulation layer 2 also comprises 15wt% loses pore-forming material.
Described silica flour is metallurgy one-level, silicone content >=98.5%; Granularity≤0.8 μm of described silica flour; The granularity of described aluminum oxide powder is 10 μm; It is wood chip that described burning loses pore-forming material, the particle diameter≤3.0mm of described wood chip; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with up-down structure, and the thickness proportion of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is 2:3.
Embodiment two
Fig. 2 is composite fire brick structure B schematic diagram, Fig. 3 is composite refractory brick zig-zag bonding surface schematic shapes, Fig. 5 is composite refractory brick sectional view.As shown in Fig. 2, Fig. 3 and Fig. 5, in the present embodiment, provide a kind of composite refractory brick, comprise heavy flame retardant coating 1 and lightweight thermal insulation layer 2; The left and right bonding surface 3 of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is zig-zag; Described heavy flame retardant coating 1 comprises: fused white corundum 20wt%, electrofused mullite 30wt%, andaluzite 12wt%, silicon carbide 15wt%, potter's clay 8wt%, aluminum oxide powder 6wt%, wooden calcium 4wt%, yellow starch gum 2wt%, silica flour 3wt%; Described lightweight thermal insulation layer 2 comprises: fused white corundum 8wt%, electrofused mullite 25wt%, andaluzite 4wt%, silicon carbide 15wt%, potter's clay 9wt%, aluminum oxide powder 5wt%, wooden calcium 6wt%, yellow starch gum 2wt%, silica flour 1wt%; The burning that described lightweight thermal insulation layer 2 also comprises 25wt% loses pore-forming material.
Described silica flour is metallurgy one-level, silicone content >=98.5%; Granularity≤0.8 μm of described silica flour; The granularity of described aluminum oxide powder is 20 μm; It is rice husk that described burning loses pore-forming material, the particle diameter≤3.0mm of described rice husk; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with tiled configuration, and the thickness proportion of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is 1:4.
Embodiment three
Fig. 1 is composite fire brick structure A schematic diagram, Fig. 4 is composite refractory brick machicolated form bonding surface schematic shapes.As shown in Fig. 1 and Fig. 4, in the present embodiment, provide a kind of composite refractory brick, comprise heavy flame retardant coating 1 and lightweight thermal insulation layer 2; The face that combines between the higher and lower levels 3 of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is machicolated form; Described heavy flame retardant coating 1 comprises: fused white corundum 30wt%, electrofused mullite 11wt%, andaluzite 11wt%, silicon carbide 10wt%, potter's clay 15wt%, aluminum oxide powder 10wt%, wooden calcium 6wt%, yellow starch gum 3wt%, silica flour 4wt%; Described lightweight thermal insulation layer 2 comprises: fused white corundum 10wt%, electrofused mullite 10wt%, andaluzite 8wt%, silicon carbide 20wt%, potter's clay 15wt%, aluminum oxide powder 10wt%, wooden calcium 5wt%, yellow starch gum 3wt%, silica flour 4wt%; The burning that described lightweight thermal insulation layer 2 also comprises 15wt% loses pore-forming material.
Described silica flour is metallurgy one-level, silicone content >=98.5%; Granularity≤0.8 μm of described silica flour; The granularity of described aluminum oxide powder is 15 μm; It is polystyrene spheres that described burning loses pore-forming material, the particle diameter≤3.0mm of described polystyrene spheres; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with up-down structure, and the thickness proportion of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is 1:3.
Embodiment four
Fig. 2 is composite fire brick structure B schematic diagram, Fig. 4 is composite refractory brick machicolated form bonding surface schematic shapes.As shown in Figures 2 and 4, in the present embodiment, provide a kind of composite refractory brick, comprise heavy flame retardant coating 1 and lightweight thermal insulation layer 2; The left and right bonding surface 3 of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is machicolated form; Described heavy flame retardant coating 1 comprises: fused white corundum 28wt%, electrofused mullite 10wt%, andaluzite 25wt%, silicon carbide 20wt%, potter's clay 7wt%, aluminum oxide powder 5wt%, wooden calcium 3wt%, yellow starch gum 1wt%, silica flour 1wt%; Described lightweight thermal insulation layer 2 comprises: fused white corundum 20wt%, electrofused mullite 20wt%, andaluzite 5wt%, silicon carbide 10wt%, potter's clay 12wt%, aluminum oxide powder 8wt%, wooden calcium 3wt%, yellow starch gum 1wt%, silica flour 1wt%; The burning that described lightweight thermal insulation layer 2 also comprises 20wt% loses pore-forming material.
Described silica flour is metallurgy one-level, silicone content >=98.5%; Granularity≤0.8 μm of described silica flour; The granularity of described aluminum oxide powder is 12 μm; Described burning loses the mixture that pore-forming material is wood chip, rice husk and polystyrene spheres; Described particle diameter≤the 3.0mm burning mistake pore-forming material; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with tiled configuration, and the thickness proportion of described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 is 1:2.
Embodiment 1 ~ 4 and common composite refractory brick break resistance index contrast as shown in table 1:
Table 1
Note: the refractory brick specification contrasting five types used is identical, tests under identical condition.
Obviously can find out that composite refractory brick Resisting fractre ability in embodiment is far above common composite refractory brick by table 1, particularly under high temperature operating conditions breaking tenacity also far above common composite refractory brick, make it operationally possess excellent Resisting fractre ability, effectively can prevent the fracture at bonding surface place.
Embodiment five
A production technique for composite refractory brick, comprising: Raw material processing-prepare burden-mix-shaping-drying-burn till-check-finished product warehouse-in.
In proportioning process, comprise the batching of heavy flame retardant coating and the batching of lightweight thermal insulation layer, heavy flame retardant coating and lightweight thermal insulation layer are separately prepared burden separately; Described heavy flame retardant coating comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer also comprises burning and loses pore-forming material; Concrete proportioning is as shown in embodiment one.
Mixing in technique, the heavy flame retardant coating completing proportioning process is separately being stirred separately with the lightweight thermal insulation layer completing proportioning process.
In moulding process, by passing through the heavy flame retardant coating of technique of mixing and being pressed into one through the lightweight thermal insulation layer of calendering process, between heavy flame retardant coating and lightweight thermal insulation layer, form contact surface.
In drying process, described drying process is divided into two stages, and the first stage is that the demoulding is dry, and drying temperature is 50 DEG C, and time of drying is 20h; Subordinate phase is forced drying, and drying temperature is 100 DEG C, and time of drying is 15h, and after dry, raw brick moisture content mass content controls below 6%.
In firing process, the composite refractory brick completing drying process is loaded high temperature kiln, is heated to 1500 DEG C from normal temperature, insulation 7h, completes firing process, and meanwhile, burning mistake pore-forming material burns to lose and forms a large amount of Minute pores.
Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with up-down structure; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 are once pressed into one, and pressing pressure is 3.2t, and compacting number of times is 6 times.
Embodiment six
A production technique for composite refractory brick, comprising: Raw material processing-prepare burden-mix-shaping-drying-burn till-check-finished product warehouse-in.
In proportioning process, comprise the batching of heavy flame retardant coating and the batching of lightweight thermal insulation layer, heavy flame retardant coating and lightweight thermal insulation layer are separately prepared burden separately; Described heavy flame retardant coating comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer also comprises burning and loses pore-forming material; Concrete proportioning is as shown in embodiment two.
Mixing in technique, the heavy flame retardant coating completing proportioning process is separately being stirred separately with the lightweight thermal insulation layer completing proportioning process.
In moulding process, by passing through the heavy flame retardant coating of technique of mixing and being pressed into one through the lightweight thermal insulation layer of calendering process, between heavy flame retardant coating and lightweight thermal insulation layer, form contact surface.
In drying process, described drying process is divided into two stages, and the first stage is that the demoulding is dry, and drying temperature is 50 DEG C, and time of drying is 20h; Subordinate phase is forced drying, and drying temperature is 100 DEG C, and time of drying is 15h, and after dry, raw brick moisture content mass content controls below 6%.
In firing process, the composite refractory brick completing drying process is loaded high temperature kiln, is heated to 1500 DEG C from normal temperature, insulation 7h, completes firing process, and meanwhile, burning mistake pore-forming material burns to lose and forms a large amount of Minute pores.
Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with tiled configuration; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 are once pressed into one, and pressing pressure is 3.6t, and compacting number of times is 4 times.
Embodiment seven
A production technique for composite refractory brick, comprising: Raw material processing-prepare burden-mix-shaping-drying-burn till-check-finished product warehouse-in.
In proportioning process, comprise the batching of heavy flame retardant coating and the batching of lightweight thermal insulation layer, heavy flame retardant coating and lightweight thermal insulation layer are separately prepared burden separately; Described heavy flame retardant coating comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer also comprises burning and loses pore-forming material; Concrete proportioning is as shown in embodiment three.
Mixing in technique, the heavy flame retardant coating completing proportioning process is separately being stirred separately with the lightweight thermal insulation layer completing proportioning process.
In moulding process, by passing through the heavy flame retardant coating of technique of mixing and being pressed into one through the lightweight thermal insulation layer of calendering process, between heavy flame retardant coating and lightweight thermal insulation layer, form contact surface.
In drying process, described drying process is divided into two stages, and the first stage is that the demoulding is dry, and drying temperature is 50 DEG C, and time of drying is 20h; Subordinate phase is forced drying, and drying temperature is 100 DEG C, and time of drying is 15h, and after dry, raw brick moisture content mass content controls below 6%.
In firing process, the composite refractory brick completing drying process is loaded high temperature kiln, is heated to 1500 DEG C from normal temperature, insulation 7h, completes firing process, and meanwhile, burning mistake pore-forming material burns to lose and forms a large amount of Minute pores.
Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 combine with up-down structure; Described heavy flame retardant coating 1 and lightweight thermal insulation layer 2 are once pressed into one, and pressing pressure is 3.4t, and compacting number of times is 5 times.
The composite refractory brick that embodiment 5 ~ 7 manufactures and the composite refractory brick break resistance index that ordinary process manufactures contrast as shown in table 2:
Table 2
Note: the refractory brick specification contrasting Four types used is identical, tests under identical condition.
The composite refractory brick that the composite refractory brick Resisting fractre ability can obviously found out in embodiment by table 2 manufactures far above ordinary process, particularly under high temperature operating conditions breaking tenacity also far above ordinary process manufacture composite refractory brick, make it operationally possess excellent Resisting fractre ability, effectively can prevent the fracture at bonding surface place.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. a composite refractory brick, comprise heavy flame retardant coating (1) and lightweight thermal insulation layer (2), it is characterized in that: described heavy flame retardant coating (1) comprising: fused white corundum 20wt% ~ 50wt%, electrofused mullite 10wt% ~ 30wt%, andaluzite 10wt% ~ 25wt%, silicon carbide 10wt% ~ 20wt%, potter's clay 6wt% ~ 15wt%, aluminum oxide powder 4wt% ~ 10wt%, wooden calcium 3wt% ~ 6wt%, yellow starch gum 1wt% ~ 3wt%, silica flour 1wt% ~ 4wt%; Described lightweight thermal insulation layer (2) comprising: fused white corundum 8wt% ~ 30wt%, electrofused mullite 9wt% ~ 25wt%, andaluzite 4wt% ~ 15wt%, silicon carbide 10wt% ~ 20wt%, potter's clay 6wt% ~ 15wt%, aluminum oxide powder 4wt% ~ 10wt%, wooden calcium 3wt% ~ 6wt%, yellow starch gum 1wt% ~ 3wt%, silica flour 1wt% ~ 4wt%; The burning that described lightweight thermal insulation layer (2) also comprises 15wt% ~ 25wt% loses pore-forming material; The thickness proportion of described heavy flame retardant coating (1) and lightweight thermal insulation layer (2) is 1 ~ 2:3 ~ 4.
2. a kind of composite refractory brick as claimed in claim 1, is characterized in that: described silica flour is metallurgy one-level, silicone content >=98.5%; Granularity≤0.8 μm of described silica flour.
3. a kind of composite refractory brick as claimed in claim 1, is characterized in that: the granularity of described aluminum oxide powder is 10 ~ 20 μm.
4. a kind of composite refractory brick as claimed in claim 1, is characterized in that: described burning mistake pore-forming material is the mixture of one or more in wood chip, rice husk or polystyrene spheres; Described particle diameter≤the 3.0mm burning mistake pore-forming material.
5. a kind of composite refractory brick as claimed in claim 1, is characterized in that: described heavy flame retardant coating (1) and lightweight thermal insulation layer (2) combine with up-down structure.
6. a kind of composite refractory brick as claimed in claim 1, is characterized in that: described heavy flame retardant coating (1) and lightweight thermal insulation layer (2) combine with tiled configuration.
7. the production technique of a kind of composite refractory brick as described in claim 1 ~ 6 any one claim, comprising: Raw material processing-prepare burden-mix-shaping-drying-burn till-check-finished product warehouse-in, is characterized in that:
A., in proportioning process, comprise the batching of heavy flame retardant coating and the batching of lightweight thermal insulation layer, heavy flame retardant coating and lightweight thermal insulation layer are separately prepared burden separately; Described heavy flame retardant coating comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer comprises: fused white corundum, electrofused mullite, andaluzite, silicon carbide, potter's clay, aluminum oxide powder, wooden calcium, yellow starch gum, silica flour; Described lightweight thermal insulation layer also comprises burning and loses pore-forming material;
B. mix in technique, the heavy flame retardant coating completing proportioning process is separately stirred separately with the lightweight thermal insulation layer completing proportioning process;
C., in moulding process, by passing through the heavy flame retardant coating of technique of mixing and being pressed into one through the lightweight thermal insulation layer of calendering process, between heavy flame retardant coating and lightweight thermal insulation layer, contact surface is formed;
D. in drying process, described drying process is divided into two stages, and the first stage is that the demoulding is dry, and drying temperature is 50 DEG C, and time of drying is 20h; Subordinate phase is forced drying, and drying temperature is 100 DEG C, and time of drying is 15h, and after dry, raw brick moisture content mass content controls below 6%;
E. in firing process, the composite refractory brick completing drying process is loaded high temperature kiln, is heated to 1500 DEG C from normal temperature, insulation 7h, completes firing process, and meanwhile, burning mistake pore-forming material burns to lose and forms a large amount of Minute pores.
8. the production technique of a kind of composite refractory brick as claimed in claim 7, is characterized in that: described heavy flame retardant coating (1) and lightweight thermal insulation layer (2) combine with up-down structure.
9. the production technique of a kind of composite refractory brick as claimed in claim 7, is characterized in that: described heavy flame retardant coating (1) and lightweight thermal insulation layer (2) combine with tiled configuration.
10. the production technique of a kind of composite refractory brick as claimed in claim 7, it is characterized in that: described heavy flame retardant coating (1) and lightweight thermal insulation layer (2) are once pressed into one, pressing pressure is 3.2 ~ 3.6t, and compacting number of times is 4 ~ 6 times.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107382364A (en) * | 2017-06-30 | 2017-11-24 | 长兴泓矿炉料有限公司 | A kind of light weight low-loss carborundum series refractory material and preparation method thereof |
| CN114988855A (en) * | 2022-05-12 | 2022-09-02 | 湖南湘钢瑞泰科技有限公司 | Converter slag-blocking non-fired and non-dipped composite sliding plate brick and preparation method thereof |
| CN117658604A (en) * | 2024-01-31 | 2024-03-08 | 江苏恒耐炉料集团有限公司 | Wear-resistant silicon mullite brick and manufacturing method thereof |
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| CN114988855A (en) * | 2022-05-12 | 2022-09-02 | 湖南湘钢瑞泰科技有限公司 | Converter slag-blocking non-fired and non-dipped composite sliding plate brick and preparation method thereof |
| CN117658604A (en) * | 2024-01-31 | 2024-03-08 | 江苏恒耐炉料集团有限公司 | Wear-resistant silicon mullite brick and manufacturing method thereof |
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Application publication date: 20160413 |