CN109251044A - A kind of high-strength refractory brick and preparation method thereof - Google Patents
A kind of high-strength refractory brick and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high-strength refractory brick and preparation method thereof, which is made of the raw material of following mass fraction: schmigel 10-15, mullite 20-30, kaolin 6-10, soft clay powder 10-15, micropowders adhesive 5-20, zircon sand 30-45, alumina powder 10-20, zirconia powder 5-10, chromium oxide powder 5-15 and water 15-30.The utility model has the advantages that having the characteristics that high intensity, the problem of being able to solve refractory brick cracking in use, and there is stronger warping resistance intensity, refractory brick fracture is not will cause when people walks above, in addition, refractory brick in the present invention can superhigh temperature resistant, effectively improve the service life of refractory brick.
Description
Technical field
The present invention relates to refractory brick technical fields, it particularly relates to a kind of high-strength refractory brick and preparation method thereof.
Background technique
Refractory brick is commonly heat preservation, heat-insulated and structural material in high-temperature furnace body.Almost all of elevated temperature vessel and equipment
Inside requires mating refractory material to realize the technical matters condition of high temperature and the work steady in a long-term of protection steel construction furnace body
Make.The high temeperature chemistry erosion-resisting characteristics of mating refractory material directly affects the service life of refractory material in high-temperature service and high temperature is set
Standby working life.
A kind of Composite thermal-shock-resisthigh-aluminum high-aluminum refractory brick that Patent No. CN201210520207.2 is announced, formula is reasonable, at
This is more cheap, and preparation method is simple to operation, and the refractory brick thermal shock resistance burnt out greatly promotes, and extends hot-blast stove
Service life improves economic benefit for enterprise.But the refractory brick in the patent does not have high-intensitive feature, can not solve
The problem of certainly refractory brick cracks in use, and warping resistance intensity is inadequate, be easy to cause when people walks above resistance to
Firebrick fracture, in addition, otherwise the refractory brick in the patent can seriously affect refractory brick generally no more than 1600-1700 DEG C
Service life.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For the problems in the relevant technologies, the present invention proposes a kind of high-strength refractory brick and preparation method thereof, existing to overcome
There is above-mentioned technical problem present in the relevant technologies.
For this purpose, the specific technical solution that the present invention uses is as follows:
The high-strength refractory brick is made of the raw material of following mass fraction:
Schmigel 10-15, mullite 20-30, kaolin 6-10, soft clay powder 10-15, micropowders adhesive 5-20, zirconium
Sand 30-45, alumina powder 10-20, zirconia powder 5-10, chromium oxide powder 5-15 and water 15-30.
Further, the preparation for high-strength refractory brick described in claim 1, comprising the following steps:
It is spare according to product outline size processing mold；
According to above-mentioned mass fraction, weighs and described be used to prepare each raw material needed for high-strength refractory brick；
Above-mentioned mullite and kaolin are crushed, being sieved into partial size is that 0-1mm and two ranks of 0-3mm are spare；
By schmigel, mullite, kaolin, soft clay powder, micropowders adhesive, zircon sand, alumina powder, zirconia powder
It is added in mixing and blending machine, mixes while stirring, while the water of formula ratio is added by formula ratio with chromium oxide powder, until mixing is equal
It is even；
The material mixed is put into compression moulding in mold；
Adobe after compression moulding is placed in mold and carries out natural curing 24-36 hours, so that the enough infiltrations completely of formula water energy
To particle inside and naturally dry；
The molding adobe that above-mentioned natural curing is completed is removed from the molds, is transported in tunnel oven and carries out high-temperature roasting；
Refractory brick after the completion of roasting is subjected to cooled to room temperature, then tests, pack.
It further, according to actual needs, can be first by schmigel, zircon sand, alumina powder, zirconia powder and chromium oxide powder
It is ground into the total milling of Du≤0.088 Xi after mixing, is then bonded again with mullite, kaolin, soft clay powder, micropowders
Agent and water are added in mixing and blending machine together and are uniformly mixed.
Further, when preparing adobe, the weight of material needed for every block of refractory brick being calculated according to volume and density,
The material of this weight is all added in mold, the refractory brick for meeting density requirements is pressed into.
Further, in the mixed material compression moulding that will be stirred evenly, using high tonnage hydraulic device or high-pressure molding
Device compression moulding.
Further, the mixed material stirred evenly is put into be pressed in mold when, need first by mixture
Material carries out shaking uniformly in a mold.
Further, it when adobe is carried out high-temperature roasting, needs through double roasting, will first form adobe in 1500-
Cooled to room temperature after being roasted 12-36 hours at 1600 DEG C, then after being roasted 60-80 hours at 1700-1900 DEG C it is naturally cold
But to room temperature.
Wherein, material component of the present invention is described below:
Schmigel: title is derived from India, is mineralogical name.There are mainly three types of variants for the polymorphism of corundum Al2O3, respectively
α-Al2O3、β-Al2O3、γ-Al2O3。
Mullite: being that a series of mineral being made of aluminosilicate are referred to as, mullite is stable in Al2O3-SiO2 system
Binary compound.
Kaolin: being a kind of nonmetallic minerals, is a kind of clay and clay rock based on kaolinite race clay mineral.Cause
White and fine and smooth, also known as white clouds are native.
Zircon sand: a kind of silicate (ZrSiO4) with zirconium is the mineral mainly formed.Pure zircon sand is colourless
Bright crystal often dyes the colors such as yellow, orange, red, brown because the place of production is different, impure type is different from quantity, and crystal structure belongs to four
Prismatic crystal system is in tetragonal pyramid cylindricality, specific gravity 4.6-4.71, the variation of specific gravity zircon cleavage related with ingredient and alteration state sometimes
Not exclusively, uniform Mohs' hardness is 7-8 grades, refractive index 1.93-2.01, and fusing point is with the difference of impurities at 2190-2420 DEG C
Interior fluctuation.Primary chemical group becomes ZrO2;The impurity such as SiO2, and a small amount of Fe2O3, CaO, AI2O3.
Alumina powder: industrial Al2O3 is prepared by bauxite (Al2O3-3H2O) and diaspore, for purity requirement
High Al2O3, generally chemically prepares.
Zirconia powder: the zirconium oxide raw mineral materials of nature mainly has baddeleyite and zircon.Zircon system igneous rock is deep
Layer mineral, color have yellowish, pale brown, yellowish green etc., specific gravity 4.6-4.7, and hardness 7.5 has strong metallic luster.
Chromium oxide powder: light green to the tiny six sides crystallization of bottle green.Scorching hot time-varying brown still becomes green after cold.Crystalline solid
It is extremely hard.It is extremely stable, even if it is also unchanged to be passed through hydrogen under red heat.It is dissolved in the bromic acid potassium solution of heating, is slightly soluble in acids and alkali
Class is practically insoluble in water, ethyl alcohol and acetone.
The invention has the benefit that by addition schmigel and mullite, so as to largely improve fire resisting
The thermal shock resistance and intensity of brick solve the problems, such as refractory brick cracking in use, by adding kaolin, so that
Refractory brick has good plasticity, caking property, insulating properties, whiteness etc. after also having certain dry tenacity, agglutinating property and burning
Property, by addition soft clay powder and micropowders adhesive, because it is thin with particle, plasticity is strong, associativity is good,
Thixotropy is excessive, and shrinking is suitable for that the processing performances such as refractoriness height effectively mention so as to improve the overall stability of refractory brick
The service life of high refractory brick, by addition zircon sand, alumina powder, zirconia powder and chromium oxide powder, so that resistance to
Firebrick has the characteristics that shrink after forming by a firing small.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow chart of high-strength refractory brick preparation method according to an embodiment of the present invention.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing, these attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment, cooperation ginseng
Examine these contents, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention, in figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
According to an embodiment of the invention, providing a kind of high-strength refractory brick and preparation method thereof.
Now in conjunction with the drawings and specific embodiments, the present invention is further described, and high intensity according to an embodiment of the present invention is resistance to
Firebrick, the high-strength refractory brick are made of the raw material of following mass fraction:
Schmigel 10-15, mullite 20-30, kaolin 6-10, soft clay powder 10-15, micropowders adhesive 5-20, zirconium
Sand 30-45, alumina powder 10-20, zirconia powder 5-10, chromium oxide powder 5-15 and water 15-30.
Above-mentioned technical proposal of the invention is understood in order to clearer, below by way of specific example to above-mentioned side of the invention
Case is described in detail.
Embodiment one
A kind of high-strength refractory brick, the high-strength refractory brick are made of the raw material of following mass fraction:
Schmigel 10-15g, mullite 20-30 g, kaolin 6-10 g, soft clay powder 10-15 g, micropowders adhesive
5-20 g, zircon sand 30-45 g, alumina powder 10-20 g, zirconia powder 5-10 g, chromium oxide powder 5-15 g and water 15-30
g。
The preparation of the high-strength refractory brick, comprising the following steps:
It is spare according to product outline size processing mold；
According to above-mentioned mass fraction, weighs and described be used to prepare schmigel 10g needed for high-strength refractory brick, 20 g of mullite, height
Ridge 6 g of soil, 10 g of soft clay powder, 5 g of micropowders adhesive, zircon sand 30g, 10 g of alumina powder, 5 g of zirconia powder,
Chromium oxide powder 5g and water 15g；
Above-mentioned mullite and kaolin are crushed, being sieved into partial size is that 0-1mm and two ranks of 0-3mm are spare；
It will be ultra tiny described in soft clay powder, 5g described in kaolin described in mullite described in schmigel, 20g described in 10g, 6g, 10g
Zircon sand described in powder adhesive, 30g, chromium oxide powder described in zirconia powder and 5g described in alumina powder, 5g described in 10g press formula ratio
It is added in mixing and blending machine, mixes while stirring, while water described in 5g is added, until being uniformly mixed；
The material mixed is put into compression moulding in mold；
Adobe after compression moulding is placed in mold and carries out natural curing 24-36 hours, so that the enough infiltrations completely of formula water energy
To particle inside and naturally dry；
The molding adobe that above-mentioned natural curing is completed is removed from the molds, is transported in tunnel oven and carries out high-temperature roasting；
Refractory brick after the completion of roasting is subjected to cooled to room temperature, then tests, pack.
Embodiment two
A kind of high-strength refractory brick, the high-strength refractory brick are made of the raw material of following mass fraction:
Schmigel 10-15g, mullite 20-30 g, kaolin 6-10 g, soft clay powder 10-15 g, micropowders adhesive
5-20 g, zircon sand 30-45 g, alumina powder 10-20 g, zirconia powder 5-10 g, chromium oxide powder 5-15 g and water 15-30
g。
The preparation of the high-strength refractory brick, comprising the following steps:
It is spare according to product outline size processing mold；
According to above-mentioned mass fraction, weigh it is described be used to prepare schmigel 12.5g needed for high-strength refractory brick, 25 g of mullite,
8 g of kaolin, 12.5 g of soft clay powder, micropowders adhesive 12.5g, zircon sand 37.5g, 15 g of alumina powder, oxidation
Zirconium powder 7.5g, chromium oxide powder 10g and water 22.5g；
Above-mentioned mullite and kaolin are crushed, being sieved into partial size is that 0-1mm and two ranks of 0-3mm are spare；
By soft clay powder described in kaolin described in mullite described in schmigel, 25g described in 12.5g, 8g, 12.5g, 12.5g institute
State oxygen described in zirconia powder described in zircon sand described in micropowders adhesive, 37.5g, alumina powder, 7.5g described in 15g and 10g
Change chromium powder to be added in mixing and blending machine by formula ratio, mix while stirring, while water described in 22.5g is added, until being uniformly mixed；
The material mixed is put into compression moulding in mold；
Adobe after compression moulding is placed in mold and carries out natural curing 24-36 hours, so that the enough infiltrations completely of formula water energy
To particle inside and naturally dry；
The molding adobe that above-mentioned natural curing is completed is removed from the molds, is transported in tunnel oven and carries out high-temperature roasting；
Refractory brick after the completion of roasting is subjected to cooled to room temperature, then tests, pack.
Embodiment three
A kind of high-strength refractory brick, the high-strength refractory brick are made of the raw material of following mass fraction:
Schmigel 10-15g, mullite 20-30 g, kaolin 6-10 g, soft clay powder 10-15 g, micropowders adhesive
5-20 g, zircon sand 30-45 g, alumina powder 10-20 g, zirconia powder 5-10 g, chromium oxide powder 5-15 g and water 15-30
g。
The preparation of the high-strength refractory brick, comprising the following steps:
It is spare according to product outline size processing mold；
According to above-mentioned mass fraction, weighs and described be used to prepare schmigel 15g needed for high-strength refractory brick, 30 g of mullite, height
Ridge 10 g of soil, 15 g of soft clay powder, 20 g of micropowders adhesive, zircon sand 45g, 20 g of alumina powder, zirconia powder 10
G, chromium oxide powder 15g and water 30g；
Above-mentioned mullite and kaolin are crushed, being sieved into partial size is that 0-1mm and two ranks of 0-3mm are spare；
By ultra micro described in soft clay powder, 20g described in kaolin described in mullite described in schmigel, 30g described in 15g, 10g, 15g
Zircon sand described in fine powder adhesive, 45g, chromium oxide powder described in zirconia powder and 15g described in alumina powder, 10g described in 20g are by matching
Side's amount is added in mixing and blending machine, mixes while stirring, while water described in 30g is added, until being uniformly mixed；
The material mixed is put into compression moulding in mold；
Adobe after compression moulding is placed in mold and carries out natural curing 24-36 hours, so that the enough infiltrations completely of formula water energy
To particle inside and naturally dry；
The molding adobe that above-mentioned natural curing is completed is removed from the molds, is transported in tunnel oven and carries out high-temperature roasting；
Refractory brick after the completion of roasting is subjected to cooled to room temperature, then tests, pack.
As shown in Figure 1, in the actual production process, the preparation of the high-strength refractory brick, comprising the following steps:
Step S101, it is spare according to product outline size processing mold；
Step S103 is weighed according to above-mentioned mass fraction and described is used to prepare each raw material needed for high-strength refractory brick；
Above-mentioned mullite and kaolin are crushed by step S105, and being sieved into partial size is that 0-1mm and two ranks of 0-3mm are standby
With；
Step S107, by schmigel, mullite, kaolin, soft clay powder, micropowders adhesive, zircon sand, aluminium oxide
Powder, zirconia powder and chromium oxide powder are added in mixing and blending machine by formula ratio, are mixed while stirring, while formula ratio is added
Water, until being uniformly mixed；
The material mixed is put into compression moulding in mold by step S109；
Step S111, the adobe after compression moulding are placed in mold and carry out natural curing 24-36 hours, so that formula water energy is enough
Completely penetrate particle inside and naturally dry；
The molding adobe that above-mentioned natural curing is completed is removed from the molds, is transported in tunnel oven and carries out high temperature by step S113
Roasting；
Refractory brick after the completion of roasting is carried out cooled to room temperature, then tests, packs by step S115.
It in one embodiment, according to actual needs, can be first by schmigel, zircon sand, alumina powder, zirconia powder and oxygen
Be ground into the total milling of Du≤0.088 Xi after changing chromium powder mixing, then again with mullite, kaolin, soft clay powder, ultra tiny
Powder adhesive and water are added in mixing and blending machine together and are uniformly mixed, so as to reduce the gap inside refractory brick, in turn
Improve the intensity of refractory brick.
In one embodiment, when preparing adobe, material needed for every block of refractory brick being calculated according to volume and density
Weight, the material of this weight is all added in molds, the refractory brick for meeting density requirements is pressed into, so as to according to reality
Border demand is fabricated to the refractory brick of different densities to meet different use demands.In addition, when concrete application, above-mentioned different densities
Refractory brick can be produced in batches.
In one embodiment, in the mixed material compression moulding that will be stirred evenly, using high tonnage hydraulic device or height
Molded device compression moulding improves production efficiency so as to a compression moulding.
In one embodiment, the mixed material stirred evenly is put into be pressed in mold when, need to first by
Mixed material carries out shaking uniformly in a mold, so that material contact is compact, avoids the occurrence of larger gap and influences
The intensity of refractory brick.
In one embodiment, it when adobe is carried out high-temperature roasting, needs through double roasting, first molding adobe exists
Cooled to room temperature after being roasted 12-36 hours at 1500-1600 DEG C, then after being roasted 60-80 hours at 1700-1900 DEG C from
It is so cooled to room temperature, so as to effectively improve the superhigh temperature resistant degree of refractory brick, improves the use scope of refractory brick.
In conclusion by means of above-mentioned technical proposal of the invention, by addition schmigel and mullite, so as to very
The thermal shock resistance and intensity that refractory brick is improved in big degree solve the problems, such as refractory brick cracking in use, by adding
Add kaolin, so that refractory brick has good plasticity, caking property, insulating properties, also there is certain dry tenacity, burn
The properties such as whiteness after knot property and burning, by addition soft clay powder and micropowders adhesive, because it is thin with particle, can
Plasticity is strong, associativity is good, and thixotropy is excessive, and shrinking is suitable for the processing performances such as refractoriness height, so as to improve the whole of refractory brick
Body stability effectively improves the service life of refractory brick, by adding zircon sand, alumina powder, zirconia powder and chromium oxide powder,
So that refractory brick has the characteristics that contraction is small after forming by a firing.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of high-strength refractory brick, which is characterized in that the high-strength refractory brick is made of the raw material of following mass fraction:
Schmigel 10-15, mullite 20-30, kaolin 6-10, soft clay powder 10-15, micropowders adhesive 5-20, zirconium
Sand 30-45, alumina powder 10-20, zirconia powder 5-10, chromium oxide powder 5-15 and water 15-30.
2. a kind of preparation method of high-strength refractory brick, which is characterized in that for high-strength refractory brick described in claim 1
Preparation, comprising the following steps:
It is spare according to product outline size processing mold；
According to above-mentioned mass fraction, weighs and described be used to prepare each raw material needed for high-strength refractory brick；
Above-mentioned mullite and kaolin are crushed, being sieved into partial size is that 0-1mm and two ranks of 0-3mm are spare；
By schmigel, mullite, kaolin, soft clay powder, micropowders adhesive, zircon sand, alumina powder, zirconia powder
It is added in mixing and blending machine, mixes while stirring, while the water of formula ratio is added by formula ratio with chromium oxide powder, until mixing is equal
It is even；
The material mixed is put into compression moulding in mold；
Adobe after compression moulding is placed in mold and carries out natural curing 24 ~ 36 hours, so that the enough infiltrations completely of formula water energy
To particle inside and naturally dry；
The molding adobe that above-mentioned natural curing is completed is removed from the molds, is transported in tunnel oven and carries out high-temperature roasting；
Refractory brick after the completion of roasting is subjected to cooled to room temperature, then tests, pack.
3. the preparation method of high-strength refractory brick according to claim 2, which is characterized in that according to actual needs, can be first
The total milling of Du≤0.088 Xi is ground into after schmigel, zircon sand, alumina powder, zirconia powder and chromium oxide powder are mixed, so
It is added in mixing and blending machine and mixes together with mullite, kaolin, soft clay powder, micropowders adhesive and water again afterwards
It is even.
4. the preparation method of high-strength refractory brick according to claim 2, which is characterized in that, can root when preparing adobe
The weight of material needed for calculating every block of refractory brick according to volume and density the material of this weight is all added in mold, compacting
At the refractory brick for meeting density requirements.
5. the preparation method of high-strength refractory brick according to claim 2, which is characterized in that in the mixing that will be stirred evenly
When material compression moulding, using high tonnage hydraulic device or high-pressure molding device compression moulding.
6. the preparation method of high-strength refractory brick according to claim 2, which is characterized in that in the mixing that will be stirred evenly
Material is put into when being pressed in mold, needs first carry out mixed material in a mold shaking uniformly.
7. the preparation method of high-strength refractory brick according to claim 2, which is characterized in that adobe is being carried out high temperature roasting
It when burning, needs through double roasting, naturally cools to room after first roasting molding adobe 12-36 hours at 1500-1600 DEG C
Temperature, then cooled to room temperature after being roasted 60-80 hours at 1700-1900 DEG C.
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| CN116621578A (en) * | 2023-04-26 | 2023-08-22 | 广州市石基耐火材料厂 | Chromium-zirconium refractory material, preparation method thereof and chromium-zirconium electrode brick |
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