CN106336200B - A kind of inorfil toughening refractory material and its preparation process - Google Patents
A kind of inorfil toughening refractory material and its preparation process Download PDFInfo
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- CN106336200B CN106336200B CN201610691668.4A CN201610691668A CN106336200B CN 106336200 B CN106336200 B CN 106336200B CN 201610691668 A CN201610691668 A CN 201610691668A CN 106336200 B CN106336200 B CN 106336200B
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Abstract
The invention discloses a kind of inorfil toughening refractory material and its preparation processes, its refractory material is made by raw materials such as gangue, red mud, magnesia, manganese oxide, titanium oxide, niobium pentaoxide and toughened fibers, its preparation step is that ball milling mixes raw material stoving after ball milling mixing in dehydrated alcohol after mixing above-mentioned raw materials, it is dry-pressing formed later, refractory material green compact are made；Then it is sintered, cooled to room temperature after the completion of sintering, inorfil toughening refractory material is made.Raw material of the present invention using the waste gangue and red mud after mineral resource utilization as refractory material, the waste after taking full advantage of mineral resource utilization；Have the characteristics that fire resistance is good using the refractory material that gangue and red mud are raw material production, after being added to toughened fiber, fracture toughness and thermal shock resistance are improved；Refractory material preparation method is simple, is easy to be produced on a large scale on existing.
Description
Technical field
The present invention relates to technical field of refractory materials, more particularly, to a kind of inorfil toughening refractory material and its preparation
Technique.
Background technique
In traditional sense, refractory material refers to that refractoriness is not less than 1580 DEG C of inorganic non-metallic material, it is for height
The basic material of temperature technique service is used as structural material and industrial high temperature container and the portion of the Thermal Equipments such as high temperature kiln
The material of part, and it is able to bear corresponding physicochemical change and mechanism.
Most of refractory material is with natural crystal (such as fire clay, silica, magnesite, dolomite) for raw material manufacture
, using certain raw materials of industry and artificial-synthetic material (such as commercial alumina, silicon carbide, mullite synthesizing, synthetic spinel
Deng) also increasing, therefore, there are many type of refractory material.Refractory material can be divided into according to mineral composition aoxidizes siliceous, silicon
Sour aluminum, olivine matter, spinel, contains carbonaceous, contains zirconia refractory and special refractory magnesia, dolomite matter；It presses
Natural crystal and artifact can be divided into according to manufacturing method；Block elements and unshape refractory can be divided by its mode；
Not burned product, burnt product and melt-cast products can be divided into according to heat treatment mode；It can be divided into according to refractoriness common, advanced and special
Grade refractory product；Acid, neutral and basic refractory can be divided into according to chemical property；Lightweight and again can be divided into according to its density
Fire resistant materials；Standard brick, special shaped brick, special special shaped brick, pipe and flame ware can be divided into according to the shape and size of its product；Also
Blast furnace use, cement kiln use, glass furnace use, ceramic kiln refractory etc. can be divided by its application.
The poor mechanical tenacity of inorganic non-metallic material is a problem generally existing in inorganic non-metallic and material, is made
For the refractory material for belonging to inorganic non-metallic material, mechanical tenacity is also poor, although refractory material is almost in use
It does not need to be moved, but thermal shock resistance when its poor mechanical tenacity has also influenced its high temperature, in chilling urgency
Gap that is hot and using is resistance to since the influences such as cracking, peeling easily occur under the effect of expanding with heat and contract with cold for biggish temperature difference refractory material
The case where fiery material integrity, reduces the service life of refractory material；The resistance to of movement is often carried out simultaneously for those needs
Fiery material product, poor mechanical tenacity can then greatly increase the spoilage of refractory product, influence its routine use.
Summary of the invention
It is discarded to solve the above problems, being prepared and adding the present invention provides a kind of utilization mineral products waste by mineral products
Inorfil made from object carry out toughening processing with good fracture toughness, good thermal shock resistance can inorfil toughening
Refractory material；
The present invention also provides a kind of processing step is concise, increase using the inorfil that existing equipment is produced
The preparation process of tough refractory material, wherein the technique for preparing inorganic toughened fiber is also relatively easy.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, red mud 120~
140 parts, 10~15 parts of magnesia, 4~6 parts of manganese oxide, 5~6 parts of titanium oxide, 2~4 parts of niobium pentaoxide, toughened fiber 15~
20 parts.
Gangue is the tailing after a kind of coal mining, and main component is silica, aluminium oxide and combustible, is also contained
There are a components such as a small amount of calcium oxide, magnesia, titanium oxide and iron oxide, there are also coal, the Huang Tie of some remnants in combustible
Mine etc. can be being generated after high-temperature process with mullite inorganic mineral mutually as main component, and combustible therein can be with
Play the role of promotion high-temperature process, reduces heat treatment energy consumption；Red mud is that a kind of bauxite extracts the tailing discarded after aluminium oxide,
Its main component is the components such as aluminium oxide, silica, calcium oxide, iron oxide, also containing groups such as a small amount of titanium oxide and sodium oxide molybdena
Point, the content of aluminium oxide is often more much higher than gangue；Gangue and red mud mix according to a certain percentage can be generated with not
Carry out stone inorganic material as main component；Mullite is a kind of inorganic compound with higher melt, and fusing point is at 1850 DEG C
More than, sieve and silica-sesquioxide system is a common and excellent refractory material system, simultaneous oxidation magnesium, calcium oxide be also have compared with
Dystectic inorganic oxide reacts to form solid solution and can promote the refractoriness of refractory material with sial system oxide, still
Since the reaction temperature of the raw materials such as sial system oxide and magnesia, calcium oxide is higher so that the synthesis temperature of refractory material compared with
Height, energy consumption is also very big, in order to suitably reduce synthesis temperature under the premise of not influencing refractoriness or smaller influence refractoriness, therefore
It is added again in the feed with the sintering aid for reducing synthesis temperature, manganese oxide, titanium oxide and niobium pentaoxide are that some have
The sintering aid of superperformance can significantly reduce the synthesis temperature of refractory material, simultaneously in the case where a small amount of addition
The addition of these three sintering aids will not cause a large effect to refractoriness as potassium sodium system sintering aid.
Preferably, gangue be high-silica gangue, silica content be 48~50wt%, alumina content be 13~
15wt%；Red mud is high alumina red mud, and alumina content is 26~28wt%, and silica content is 12~14wt%, calcium oxide content
For 25~27wt%.
Preferably, calcium oxide system of the toughened fiber by the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight
At；Its making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, Zhi Hou
Impregnated 2 hours in the aqueous hydrochloric acid solution of 0.5mol/L, be after filtering it is dry after washing with water, treated red mud and magnesia and
Calcium oxide mixing, heats the mixture to 1300 DEG C of meltings, removes non-fusant and carries out centrifugal drying silk and toughening fibre is made after cutting
Dimension.
Red mud is that bauxite/bauxite extracts discarded tailing after aluminium oxide, 1 ton of aluminium oxide of every production, it can generate 2~
4 tons of red muds, cause great harm environment；Main component is silica, aluminium oxide and calcium oxide, these components pair in red mud
The performance of refractory material will not generate adverse effect, but also containing the iron oxide of part in red mud, content up to 5% and with
On, if these iron oxide enter in refractory material, it will caused great harm to performances such as the refractoriness of refractory material, red mud
In iron oxide exist in the form of limonite, can be reacted with acid, and the aluminium oxide in red mud exists in the form of pyralspite
It is not easy to react with acid, calcium oxide exists in the form of calcium silicates and perovskite in red mud, is also not easy to react with acid, therefore can use
The method of acidleach removes the iron oxide harmful components in red mud；Acidleach processing after red mud cleaning grinding is removed into harmful oxygen therein
Change ferrous components, adds calcium oxide and magnesia later as melting auxiliary agent, be made after raw material is melted through centrifugal drying silk not come
Stone is the toughened fiber of principal crystalline phase.
Preferably, the diameter of toughened fiber is 0.01~0.1mm, length is 1~2mm.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；
It b) will be through step a treated refractory material powder ball milling mixing 3 in the dehydrated alcohol of 2~3 times of raw material weights
~5 hours, by raw material stoving after ball milling mixing；
C) will through step a, treated that raw material is dry-pressing formed under 10~20MPa pressure, refractory material green compact are made；
D) refractory material green compact after molding are sintered 3~5 hours at 1200~1400 DEG C, it is naturally cold after the completion of sintering
But to room temperature, inorfil toughening refractory material is made.
Preferably, step a raw material mixing after pre-burning specific steps are as follows: by raw material mix post blend raw material weight 6~
The coal dust of 8wt%, after mixing will mixed-powder spray into rotary kiln in be sintered, be warming up to 150~200 DEG C heat preservation 0.5~
It 1 hour, is warming up to 550~600 DEG C and keeps the temperature 0.5~1 hour, be warming up to 900~1000 DEG C and be sintered 2~3 hours, in sintering process
Continuous rotary kiln constantly rotates.
The hydromica needs contained in raw material gangue are dehydrated at 100~200 DEG C, and the kaolinite class mineral contained exist
500~600 DEG C are dehydrated, therefore need to be kept the temperature in the two temperature to carry out corresponding mineral dehydration；Oxidation in raw material
Aluminium component and oxidation silicon components will form corresponding mullite component after calcination at high temperature；Contain remaining coal in raw material gangue
With the combustibles such as some troilite, its own burning can promote the reaction and conjunction of raw material when being heat-treated in rotary kiln
At, but since noncombustible matter content therein is limited, it is therefore desirable to it is combustion-supporting that a small amount of coal dust progress is added.
Preferably, the rotational speed of ball-mill in step b when ball milling is 1500~2000rpm.
Preferably, in step c, before dry-pressing formed, uniformly sprayed into raw material material quality 8~12% 0.1~
The aqueous sodium carbonate of 0.12mol/L and granulation.
Powder carry out it is dry-pressing formed before be granulated and make powder unity at the microballoon of 0.1mm or so, after promoting dry-pressing
Consistency, it is loose during the sintering process to be also prevented from refractory material block；Using aqueous sodium carbonate, one plays the work of granulation
With two can add suitable sodium carbonate in powder, and sodium carbonate can be decomposed at high temperature so that generating one in refractory material
A little subtle ducts, mitigate the sole mass of refractory material, can also increase the heat preservation and insulation of refractory material.
Preferably, in step d, heating rate when heating is 3~5 DEG C/min.
Therefore, the invention has the following advantages:
(1) raw material of the present invention using the waste gangue and red mud after mineral resource utilization as refractory material, fills
Divide and the waste after mineral resource utilization is utilized, increase the added value of mineral resources waste, is to solve because of mineral resources
Effort is made using environmental pollution and problem of resource waste caused by waste；
(2) have the characteristics that fire resistance is good using the refractory material that gangue and red mud are raw material production in the present invention,
Especially after being added to the toughened fiber by red mud for raw material production, fracture toughness and thermal shock resistance are greatly mentioned
It is high；
(3) the refractory material preparation method in the present invention is simple, is easy to be produced on a large scale on existing.
Specific embodiment
Further description of the technical solution of the present invention With reference to embodiment.
Embodiment 1
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, 120 parts of red mud,
10 parts of magnesia, 4 parts of manganese oxide, 5 parts of titanium oxide, 2 parts of niobium pentaoxide, 15 parts of toughened fiber；Gangue is high-silica gangue,
Its silica content is 48wt%, alumina content 13wt%；Red mud is high alumina red mud, alumina content 26wt%, oxidation
Silicone content is 12wt%, calcium oxide content 25wt%；
Wherein, toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；Its
Making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, later 0.5mol/L's
It is impregnated 2 hours in aqueous hydrochloric acid solution, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide
It closes, heats the mixture to 1300 DEG C of meltings, remove non-fusant and carry out centrifugal drying silk and toughened fiber is made after cutting.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；The specific steps of pre-burning after raw material mixing are as follows: will
Raw material mixes the coal dust of post blend raw material weight 6wt%, sprays into rotary kiln mixed-powder be sintered after mixing, rises
It when temperature to 150 DEG C of heat preservations 0.5, is warming up to 550 DEG C and keeps the temperature 0.5 hour, be warming up to 900 DEG C and be sintered 2 hours, in sintering process constantly
Rotary kiln constantly rotates；
It b) will be through step a treated refractory material powder ball milling mixing 3~5 in the dehydrated alcohol of 2 times of raw material weights
Hour, by raw material stoving after ball milling mixing；
C) will through step a, treated that raw material is dry-pressing formed under 10MPa pressure, refractory material green compact are made；
D) refractory material green compact after molding are sintered 3 hours at 1200 DEG C, cooled to room temperature after the completion of sintering,
Inorfil toughening refractory material is made.
Embodiment 2
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, 130 parts of red mud,
12 parts of magnesia, 5 parts of manganese oxide, 5.5 parts of titanium oxide, 3 parts of niobium pentaoxide, 17 parts of toughened fiber；Gangue is high silicon coal cash
Stone, silica content 49wt%, alumina content 14wt%；Red mud be high alumina red mud, alumina content 27wt%,
Silica content is 13wt%, calcium oxide content 26wt%；
Wherein, toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；Its
Making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, later 0.5mol/L's
It is impregnated 2 hours in aqueous hydrochloric acid solution, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide
It closes, heats the mixture to 1300 DEG C of meltings, remove non-fusant and carry out centrifugal drying silk and toughened fiber is made after cutting.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；The specific steps of pre-burning after raw material mixing are as follows: will
Raw material mixes the coal dust of post blend raw material weight 7wt%, sprays into rotary kiln mixed-powder be sintered after mixing, rises
Temperature to 170 DEG C keep the temperature 0.7 hour, be warming up to 570 DEG C keep the temperature 0.7 hour, be warming up to 950 DEG C be sintered 2.5 hours, in sintering process
Continuous rotary kiln constantly rotates；
B) by through step a, treated that refractory material powder ball milling mixing 4 in the dehydrated alcohol of 2.5 times of raw material weights is small
When, by raw material stoving after ball milling mixing；
C) will through step a, treated that raw material is dry-pressing formed under 15MPa pressure, refractory material green compact are made；
D) refractory material green compact after molding are sintered 45 hours at 1300 DEG C, room is naturally cooled to after the completion of sintering
Inorfil toughening refractory material is made in temperature.
Embodiment 3
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, 140 parts of red mud,
15 parts of magnesia, 6 parts of manganese oxide, 6 parts of titanium oxide, 4 parts of niobium pentaoxide, 20 parts of toughened fiber；Gangue is high-silica gangue,
Its silica content is 50wt%, alumina content 15wt%；Red mud is high alumina red mud, alumina content 28wt%, oxidation
Silicone content is 14wt%, calcium oxide content 27wt%；
Wherein, toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；Its
Making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, later 0.5mol/L's
It is impregnated 2 hours in aqueous hydrochloric acid solution, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide
It closes, heats the mixture to 1300 DEG C of meltings, remove non-fusant and carry out centrifugal drying silk and toughened fiber is made after cutting.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；The specific steps of pre-burning after raw material mixing are as follows: will
Raw material mixes the coal dust of post blend raw material weight 8wt%, sprays into rotary kiln mixed-powder be sintered after mixing, rises
Temperature to 200 DEG C keep the temperature 1 hour, be warming up to 600 DEG C keep the temperature 1 hour, be warming up to 1000 DEG C be sintered 3 hours, in sintering process constantly
Rotary kiln constantly rotates；
B) by through step a, treated that refractory material powder ball milling mixing 5 in the dehydrated alcohol of 3 times of raw material weights is small
When, by raw material stoving after ball milling mixing；
C) will through step a, treated that raw material is dry-pressing formed under 20MPa pressure, refractory material green compact are made；
D) refractory material green compact after molding are sintered 5 hours at 1400 DEG C, cooled to room temperature after the completion of sintering,
Inorfil toughening refractory material is made.
Embodiment 4
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, 120 parts of red mud,
10 parts of magnesia, 4 parts of manganese oxide, 5 parts of titanium oxide, 2 parts of niobium pentaoxide, 15 parts of toughened fiber；Gangue is high-silica gangue,
Its silica content is 48wt%, alumina content 13wt%；Red mud is high alumina red mud, alumina content 26wt%, oxidation
Silicone content is 12wt%, calcium oxide content 25wt%；
Wherein, toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；Its
Making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, later 0.5mol/L's
It is impregnated 2 hours in aqueous hydrochloric acid solution, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide
It closes, heats the mixture to 1300 DEG C of meltings, remove non-fusant and carry out centrifugal drying silk and toughened fiber is made after cutting；Toughening is fine
The diameter of dimension is 0.01mm, length 1mm.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；The specific steps of pre-burning after raw material mixing are as follows: will
Raw material mixes the coal dust of post blend raw material weight 6wt%, sprays into rotary kiln mixed-powder be sintered after mixing, rises
Temperature to 150 DEG C keep the temperature 0.5 hour, be warming up to 550 DEG C keep the temperature 0.5 hour, be warming up to 900 DEG C be sintered 2 hours, in sintering process not
Disconnected rotary kiln constantly rotates；
B) by through step a, treated that refractory material powder ball milling mixing 3 in the dehydrated alcohol of 2 times of raw material weights is small
When, by raw material stoving after ball milling mixing；Rotational speed of ball-mill when ball milling is 1500rpm；
C) will through step a, treated that raw material is dry-pressing formed under 10MPa pressure, refractory material green compact are made；In dry-pressing
Before molding, the aqueous sodium carbonate of the 0.1mol/L of material quality 8% and granulation are uniformly sprayed into raw material；
D) refractory material green compact after molding are sintered 3 hours at 1200 DEG C, cooled to room temperature after the completion of sintering,
Inorfil toughening refractory material is made；Heating rate when heating is 3 DEG C/min.
Embodiment 5
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, red mud 120~
140 parts, 10~15 parts of magnesia, 4~6 parts of manganese oxide, 5~6 parts of titanium oxide, 2~4 parts of niobium pentaoxide, toughened fiber 15~
20 parts；Gangue is high-silica gangue, and silica content is 48~50wt%, and alumina content is 13~15wt%；Red mud is
High alumina red mud, alumina content are 26~28wt%, and silica content is 12~14wt%, and calcium oxide content is 25~27wt%；
Wherein, toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；Its
Making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, later 0.5mol/L's
It is impregnated 2 hours in aqueous hydrochloric acid solution, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide
It closes, heats the mixture to 1300 DEG C of meltings, remove non-fusant and carry out centrifugal drying silk and toughened fiber is made after cutting；Toughening is fine
The diameter of dimension is 0.01~0.1mm, and length is 1~2mm.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；The specific steps of pre-burning after raw material mixing are as follows: will
Raw material mixes the coal dust of 6~8wt% of post blend raw material weight, sprays into rotary kiln mixed-powder be sintered after mixing,
It is warming up to 150~200 DEG C and keeps the temperature 0.5~1 hour, be warming up to 550~600 DEG C and keep the temperature 0.5~1 hour, be warming up to 900~1000
DEG C sintering 2~3 hours, continuous rotary kiln constantly rotates in sintering process；
It b) will be through step a treated refractory material powder ball milling mixing 3 in the dehydrated alcohol of 2~3 times of raw material weights
~5 hours, by raw material stoving after ball milling mixing；Rotational speed of ball-mill when ball milling is 1500~2000rpm；
C) will through step a, treated that raw material is dry-pressing formed under 10~20MPa pressure, refractory material green compact are made；?
Before dry-pressing formed, the aqueous sodium carbonate of 0.1~0.12mol/L of material quality 8~12% is uniformly sprayed into raw material and is made
Grain；
D) refractory material green compact after molding are sintered 3~5 hours at 1200~1400 DEG C, it is naturally cold after the completion of sintering
But to room temperature, inorfil toughening refractory material is made；Heating rate when heating is 3~5 DEG C/min.
Embodiment 6
A kind of inorfil toughening refractory material, is made by the raw material of following parts by weight: 50 parts of gangue, 140 parts of red mud,
15 parts of magnesia, 6 parts of manganese oxide, 6 parts of titanium oxide, 4 parts of niobium pentaoxide, 20 parts of toughened fiber；Gangue is high-silica gangue,
Its silica content is 50wt%, alumina content 15wt%；Red mud is high alumina red mud, alumina content 28wt%, oxidation
Silicone content is 14wt%, calcium oxide content 27wt%；
Wherein, toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；Its
Making step is first red mud to be carried out ball milling under 2500rpm revolving speed, then cleaned with water, later 0.5mol/L's
It is impregnated 2 hours in aqueous hydrochloric acid solution, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide
It closes, heats the mixture to 1300 DEG C of meltings, remove non-fusant and carry out centrifugal drying silk and toughened fiber is made after cutting；Toughening is fine
The diameter of dimension is 0.1mm, length 2mm.
A kind of preparation process of inorfil toughening refractory material, comprising the following steps:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；The specific steps of pre-burning after raw material mixing are as follows: will
Raw material mixes the coal dust of post blend raw material weight 8wt%, sprays into rotary kiln mixed-powder be sintered after mixing, rises
Temperature to 200 DEG C keep the temperature 1 hour, be warming up to 600 DEG C keep the temperature 1 hour, be warming up to 1000 DEG C be sintered 3 hours, in sintering process constantly
Rotary kiln constantly rotates；
B) by through step a, treated that refractory material powder ball milling mixing 5 in the dehydrated alcohol of 3 times of raw material weights is small
When, by raw material stoving after ball milling mixing；Rotational speed of ball-mill when ball milling is 2000rpm；
C) will through step a, treated that raw material is dry-pressing formed under 20MPa pressure, refractory material green compact are made；In dry-pressing
Before molding, the aqueous sodium carbonate of the 0.12mol/L of material quality 12% and granulation are uniformly sprayed into raw material；
D) refractory material green compact after molding are sintered 5 hours at 1400 DEG C, cooled to room temperature after the completion of sintering,
Inorfil toughening refractory material is made；Heating rate when heating is 5 DEG C/min.
Technical indicator:
1. refractoriness >=1750 DEG C, maximum uses temperature >=1650 DEG C；
2. apparent porosity≤10%；
3. cold crushing strength >=90MPa；
4. refractoriness under load >=1600 DEG C；
5. fracture toughness >=1.7MPam1/2。
Claims (7)
1. a kind of inorfil toughening refractory material, it is characterised in that be made by the raw material of following parts by weight: 50 parts of gangue, red
120~140 parts of mud, 10~15 parts of magnesia, 4~6 parts of manganese oxide, 5~6 parts of titanium oxide, 2~4 parts of niobium pentaoxide, toughening is fine
15~20 parts of dimension；
The gangue is high-silica gangue, and silica content is 48~50wt%, and alumina content is 13~15wt%；It is red
Mud be high alumina red mud, alumina content be 26~28wt%, silica content be 12~14wt%, calcium oxide content be 25~
27wt%；
The toughened fiber is made of the calcium oxide of the red mud of 50 parts by weight, the magnesia of 3 parts by weight and 1 parts by weight；It is made
It is first red mud to be subjected to ball milling under 2500rpm revolving speed, then cleaned with water as step, later in the salt of 0.5mol/L
It is impregnated 2 hours in aqueous acid, is drying after washing with water after filtering, treated, and red mud is mixed with magnesia and calcium oxide,
1300 DEG C of meltings are heated the mixture to, non-fusant is removed and carries out centrifugal drying silk and toughened fiber is made after cutting.
2. a kind of inorfil toughening refractory material according to claim 1, it is characterised in that: the toughened fiber it is straight
Diameter is 0.01~0.1mm, and length is 1~2mm.
3. a kind of preparation process of inorfil toughening refractory material according to claim 1, it is characterised in that including with
Lower step:
A) pre-burning after mixing above-mentioned raw materials obtains refractory material powder；
B) by through step a, treated that refractory material powder ball milling mixing 3~5 in the dehydrated alcohol of 2~3 times of raw material weights is small
When, by raw material stoving after ball milling mixing；
C) will through step a, treated that raw material is dry-pressing formed under 10~20MPa pressure, refractory material green compact are made；
D) refractory material green compact after molding are sintered 3~5 hours at 1200~1400 DEG C, are naturally cooled to after the completion of sintering
Inorfil toughening refractory material is made in room temperature.
4. a kind of preparation process of inorfil toughening refractory material according to claim 3, it is characterised in that the step
The specific steps of pre-burning after rapid a raw material mixing are as follows: raw material is mixed to the coal dust of 6~8wt% of post blend raw material weight, is uniformly mixed
Mixed-powder is sprayed into rotary kiln afterwards and be sintered, 150~200 DEG C is warming up to and keeps the temperature 0.5~1 hour, it is warming up to 550~
600 DEG C keep the temperature 0.5~1 hour, are warming up to 900~1000 DEG C and are sintered 2~3 hours, rotary kiln constantly rotates in sintering process.
5. a kind of preparation process of inorfil toughening refractory material according to claim 3, it is characterised in that: the step
Rotational speed of ball-mill in rapid b when ball milling is 1500~2000rpm.
6. a kind of preparation process of inorfil toughening refractory material according to claim 3, it is characterised in that: the step
In rapid c, before dry-pressing formed, the sodium carbonate that 0.1~0.12mol/L of material quality 8~12% is uniformly sprayed into raw material is water-soluble
Liquid is simultaneously granulated.
7. a kind of preparation process of inorfil toughening refractory material according to claim 3, it is characterised in that: the step
In rapid d, heating rate when heating is 3~5 DEG C/min.
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| CN107337459A (en) * | 2017-06-30 | 2017-11-10 | 长兴泓矿炉料有限公司 | A kind of fiber reinforced refractory material raw powder's production technology |
| CN107162618A (en) * | 2017-07-19 | 2017-09-15 | 合肥铭佑高温技术有限公司 | A kind of preparation method of novel refractory |
| CN109987956A (en) * | 2019-04-15 | 2019-07-09 | 宋志成 | A kind of refractory material enhancing toughness |
| CN110015891A (en) * | 2019-04-15 | 2019-07-16 | 宋志成 | A kind of refractory material that toughness is high |
| CN111719093A (en) * | 2020-06-28 | 2020-09-29 | 无锡市强亚耐火材料有限公司 | Special refractory material for ultra-large gas purification device and preparation process thereof |
| CN114380606A (en) * | 2022-01-05 | 2022-04-22 | 江苏材睿科技有限公司 | Preparation process of machined high-strength refractory material |
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