CN108218402A - A kind of preparation method of gunning refractory - Google Patents
A kind of preparation method of gunning refractory Download PDFInfo
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- CN108218402A CN108218402A CN201711487394.8A CN201711487394A CN108218402A CN 108218402 A CN108218402 A CN 108218402A CN 201711487394 A CN201711487394 A CN 201711487394A CN 108218402 A CN108218402 A CN 108218402A
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Abstract
The invention discloses a kind of preparation methods of gunning refractory, belong to non-metallic refractory technical field.It counts in parts by weight, weighs 10~20 parts of entringite, 60~70 parts of mixing magnesia successively, 2~6 parts of aluminum-spinels, 5~8 parts of zirconium oxides, 1~3 part of kyanite, 10~18 parts of bonding agents, 12~25 parts of modified meerschaums, 10~15 parts of modified wood chips and 5~8 parts of pretreatment graphene oxides, entringite is mixed, and sequentially add magnesia spinel magnesium, spinelle with mixing magnesia, zirconium oxide, bonding agent, modified meerschaum, modified wood chips and pretreatment graphene oxide, to get gunning refractory after being stirred.Gunning refractory prepared by technical solution of the present invention has the characteristics that intensity and resistance to slag corrosion.
Description
Technical field
The invention discloses a kind of preparation methods of gunning refractory, belong to non-metallic refractory technical field.
Background technology
The use development of gun-mix refractory is very fast, the important kind being increasingly becoming in amorphous refractory.Production practices
It proves, such material is to speed up construction speed, shortens and repair the stove time, extend kiln service life and reduce refractory consumption rate
One effective technology measure, by the most attention of whole world researcher.Oxygen top-blown converter is due to for a long time in the condition of high temperature
Lower work is constantly corroded by the impact of mechanical force and clinker, and the refractory material of the big facial position of furnace bottom, trunnion and two easily meets with
To destruction, need often to repair trunnion and slag lining using the method for spray repair.The quality of gunning refractory quality directly decides
Spray repair effect, the adhesive rate that gunning refractory will not only have will also have high erosion resisting, and modern converter will use preventative spray repair
With remedial spray repair, so gunning refractory should have following performance：（1）Gunning refractory good fluidity easily carries out spray repair operation, during spray repair
For adhesive rate more than 85%, setting rate is fast, can form uniform spray repair layer；（2）Spray repair layer energy Fast Sintering has sufficiently high
Intensity, after spray repair can immediately hot metal charging make steel；（3）There is good erosion resisting to clinker, have to molten steel and clinker good
Abrasion resistance.The damage of the spray repair bed of material includes molten steel, slag washes away, and the chemical corrode of slag liquid, structural stress and thermal stress are drawn
Peeling risen etc..To ensure that construction spray repair layer has preferable durable ratio, raw materials used kind, grade are suitable, material grain
It is reasonable to spend grading, simultaneous selection appropriate binding agent and additive；The converter gunning being commonly used is magnesia spray repair
Material the shortcomings that improving traditional gunning refractory to a certain extent resistant to corrosion, non-resistance to erosion, service life is not relatively low etc., but still has very big
Room for promotion.
Therefore, how to improve the shortcomings that traditional gunning refractory intensity is not high and resistance to slag corrosion is poor, it is comprehensive to obtain higher
The gunning refractory of energy is that it is promoted with applied to broader field, meeting industrial production demand urgent problem to be solved.
Invention content
The present invention solves the technical problem of：For traditional gunning refractory intensity is not high and what resistance to slag corrosion was poor lacks
Point provides a kind of preparation method of gunning refractory.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）By sepiolite and water in mass ratio 1：8~1：10 mixing, and add in Pasteur's gemma of 0.5~0.6 times of sepiolite quality
Bacillus, the urea and the magnesium nitrate of 0.1~0.2 times of sepiolite quality that 0.1~0.2 times of sepiolite quality, after being stirred, revolving
Concentration, it is dry, obtain modified meerschaum；
（2）Sawdust in low temperature environment is carbonized, obtains charing sawdust, by charing sawdust and ethyl orthosilicate in mass ratio 1：3~
1：5 mixing, filtering obtain pretreatment sawdust, by pretreatment sawdust and paraffin in mass ratio 1：5~1：6 mixing, Freezing smashing obtain
Modified wood chips；
（3）It counts in parts by weight, weighs 10~20 parts of entringite successively, 60~70 parts of mixing magnesia, 2~8 parts of sodium tripolyphosphates,
2~6 parts of aluminum-spinels, 1~3 part of kyanite, 5~8 parts of zirconium oxides, 10~18 parts of bonding agents, 12~25 parts of modified meerschaums,
10~15 parts of modified wood chips and 5~8 parts of pretreatment graphene oxides, entringite is mixed, and sequentially add three with mixing magnesia
Polyphosphate sodium, magnesia spinel magnesium, spinelle, zirconium oxide, bonding agent, modified meerschaum, modified wood chips and pretreatment graphite oxide
Alkene, to get gunning refractory after being stirred.
Step（2）The sawdust grain size is 1~2mm.
Step（2）The paraffin is the mineral wax mixture that carbon atom number is 20~30.
Step（3）The preparation method of the mixing magnesia be by magnesia that grain size is 1~3mm and grain size be 0.088~
The magnesia of 0.099mm in mass ratio 2：1~1：1 mixing, and add in the grain for 0.3~0.4 times of the magnesia quality that grain size is 1~3mm
Diameter is less than the magnesia of 0.088mm, is stirred, obtains mixing magnesia.
Step（3）The aluminum-spinel grain size is 0.2~2.0mm.
Step（3）The kyanite grain size is 0.1~1.2mm.
Step（3）The preparation method of the bonding agent is by clay and aluminate cement in mass ratio 1：3~1：4 mixing,
And the Alpha-alumina of 0.1~0.3 times of clay quality is added in, it is stirred to obtain bonding agent.
Step（3）The preparation method of the pretreatment graphene oxide is by graphene oxide Ultrasonic Pulverization, and drying obtains pre-
Handle graphene oxide.
The beneficial effects of the invention are as follows：
（1）The present invention adds in modified meerschaum when preparing gunning refractory, and Bacillus pasteurii, urea are added in modified meerschaum
And magnesium nitrate, magnesium carbonate tiny balloon and ammonium nitrate can be formed, and be filled in sepiolite in modified meerschaum preparation process
Hole in, first, modified meerschaum add in product system in after, hollow magnesium carbonate microballoon can be heated in use divides
Solution generates magnesia, and raw materials of magnesium oxide is provided for sintering, secondly, modified so as to which product be made to have preferable intensity after use
The ammonium nitrate contained in sepiolite can acutely decompose during product use, and larger heat is generated inside system, carry
Each storeroom of interiors of products is come into full contact with while being sintered the energy needed for inside, so as to which the sintering degree for making product carries
Height, and then improve the intensity of product；
（2）The present invention adds in modified wood chips when preparing gunning refractory, on the one hand, the sawdust in modified wood chips can provide carbon for product
Source, so as to promote the sintering of product, and the carbon in sawdust can be with zirconium oxide generating portion zirconium carbide under the high temperature conditions, filling
Product inner pore so as to improve the intensity of product and resistance to slag, on the other hand, ethyl orthosilicate is added in modified wood chips,
Ethyl orthosilicate can hydrolyze during product use in product during hydrated cementitious, generate silica and ethyl alcohol, production
Raw silica can be filled in interiors of products, and so as to further improve the intensity of product and resistance to slag, the ethyl alcohol of generation can
Energy is provided for product sintering, sintering is promoted to carry out.
Specific embodiment
By sepiolite and water in mass ratio 1：8~1：10 are mixed in beaker, and sepiolite quality 0.5 is added in into beaker
~0.6 times of Bacillus pasteurii, the urea and the nitric acid of 0.1~0.2 times of sepiolite quality that 0.1~0.2 times of sepiolite quality
Magnesium is 30~40 DEG C in temperature, under conditions of rotating speed is 180~250r/min, after being stirred 1~2h, obtains sepiolite mixing
Sepiolite mixture is moved into Rotary Evaporators by object, is 45~65 DEG C in temperature, rotating speed is 120~150r/min, and pressure is
Under conditions of 500~600kPa after 1~2h of concentrated by rotary evaporation, revolving object is obtained, by revolving object under conditions of temperature is 55~65 DEG C
After dry 20~50min, modified meerschaum is obtained；Sawdust is moved into retort, and into retort with the speed of 15~25mL/min
Rate is passed through nitrogen, under conditions of being 300~500 DEG C in temperature after 45~80min of low-temperature carbonization, charing sawdust is obtained, by carbonized wood
Bits and ethyl orthosilicate in mass ratio 1：3~1：5 mixing are 45~65 DEG C in temperature, and rotating speed is the condition of 200~350r/min
Under, after being stirred 30~50min, filtering obtains pretreatment sawdust, by pretreatment sawdust and paraffin in mass ratio 1：5~1：6 is mixed
It closes, is 55~65 DEG C in temperature, under conditions of rotating speed is 200~260rmin, after being stirred 15~35min, obtains sawdust paraffin
Mixture by sawdust mineral wax mixture Freezing smashing, obtains modified wood chips；It counts in parts by weight, weighs 10~20 parts of calcium alum successively
Stone, 60~70 parts of mixing magnesia, 2~8 parts of sodium tripolyphosphates, 2~6 parts of aluminum-spinels, 1~3 part of kyanite, 5~8 parts of oxidations
Zirconium, 10~18 parts of bonding agents, 12~25 parts of modified meerschaums, 10~15 parts of modified wood chips and 5~8 parts of pretreatment graphite oxides
Entringite is mixed in mixing magnesia in blender, and adds in sodium tripolyphosphate, magnesia spinel into blender successively by alkene
Magnesium, spinelle, zirconium oxide, bonding agent, modified meerschaum, modified wood chips and pretreatment graphene oxide, in temperature be 25~35
DEG C, rotating speed is stirred after 15~30min under conditions of being 220~300r/min to get gunning refractory.The sawdust grain size is 1
~2mm.The paraffin is the mineral wax mixture that carbon atom number is 20~30.The preparation method of the mixing magnesia is to be by grain size
The magnesia of 1~3mm and the magnesia in mass ratio 2 that grain size is 0.088~0.099mm：1~1：1 mixing, and add in grain size for 1~
The grain size of 0.3~0.4 times of the magnesia quality of 3mm is less than the magnesia of 0.088mm, is stirred, obtains mixing magnesia.The magnalium point
Spar grain size is 0.2~2.0mm.The kyanite grain size is 0.1~1.2mm.The preparation method of the bonding agent is by clay
With aluminate cement in mass ratio 1：3~1：4 mixing, and the Alpha-alumina of 0.1~0.3 times of clay quality is added in, it is stirred
Obtain bonding agent.The preparation method of the pretreatment graphene oxide is by graphene oxide Ultrasonic Pulverization, and drying obtains pretreatment oxygen
Graphite alkene.
Example 1
By sepiolite and water in mass ratio 1：10 are mixed in beaker, and the Pasteur of 0.6 times of sepiolite quality is added in into beaker
Bacillus, the urea and the magnesium nitrate of 0.2 times of sepiolite quality that 0.2 times of sepiolite quality are 40 DEG C in temperature, and rotating speed is
Under conditions of 250r/min, after being stirred 2h, sepiolite mixture is obtained, sepiolite mixture is moved into Rotary Evaporators, in
Temperature is 65 DEG C, rotating speed 150r/min, under conditions of pressure is 600kPa after concentrated by rotary evaporation 2h, obtains revolving object, will rotate object
Under conditions of being 65 DEG C in temperature after dry 50min, modified meerschaum is obtained；Sawdust is moved into retort, and into retort with
The rate of 25mL/min is passed through nitrogen, under conditions of being 500 DEG C in temperature after low-temperature carbonization 80min, obtains charing sawdust, will carbonize
Sawdust and ethyl orthosilicate in mass ratio 1：5 mixing are 65 DEG C in temperature, under conditions of rotating speed is 350r/min, are stirred
After 50min, filtering obtains pretreatment sawdust, by pretreatment sawdust and paraffin in mass ratio 1：6 mixing, in temperature be 65 DEG C, rotating speed
Under conditions of 260rmin, after being stirred 35min, sawdust mineral wax mixture is obtained, by sawdust mineral wax mixture Freezing smashing,
Obtain modified wood chips；It counts in parts by weight, weighs 20 parts of entringite, 70 parts of mixing magnesia, 8 parts of sodium tripolyphosphates, 6 parts of magnaliums successively
Spinelle, 3 parts of kyanites, 8 parts of zirconium oxides, 18 parts of bonding agents, 25 parts of modified meerschaums, 15 parts of modified wood chips and 8 parts of pretreatments
Entringite is mixed in mixing magnesia in blender, and adds in sodium tripolyphosphate, magnesium into blender successively by graphene oxide
Spinelle magnesium, spinelle, zirconium oxide, bonding agent, modified meerschaum, modified wood chips and pretreatment graphene oxide are in temperature
35 DEG C, rotating speed is stirred after 30min under conditions of being 300r/min to get gunning refractory.The sawdust grain size is 2mm.It is described
Paraffin is the mineral wax mixture that carbon atom number is 20~30.The magnesia that it is 3mm by grain size that the preparation method of the mixing magnesia, which is,
With the magnesia in mass ratio 1 that grain size is 0.099mm：1 mixing, and the grain size for adding in 0.4 times of the magnesia quality that grain size is 3mm is less than
The magnesia of 0.088mm, is stirred, and obtains mixing magnesia.The aluminum-spinel grain size is 2.0mm.The kyanite grain size is
1.2mm.The preparation method of the bonding agent is by clay and aluminate cement in mass ratio 1：4 mixing, and add in clay quality
0.3 times of Alpha-alumina is stirred to obtain bonding agent.The preparation method of the pretreatment graphene oxide is by graphene oxide
Ultrasonic Pulverization, it is dry, obtain pretreatment graphene oxide.
Example 2
By sepiolite and water in mass ratio 1：10 are mixed in beaker, and the Pasteur of 0.6 times of sepiolite quality is added in into beaker
Bacillus, the urea and the magnesium nitrate of 0.2 times of sepiolite quality that 0.2 times of sepiolite quality are 40 DEG C in temperature, and rotating speed is
Under conditions of 250r/min, after being stirred 2h, sepiolite mixture is obtained, sepiolite mixture is moved into Rotary Evaporators, in
Temperature is 65 DEG C, rotating speed 150r/min, under conditions of pressure is 600kPa after concentrated by rotary evaporation 2h, obtains revolving object, will rotate object
Under conditions of being 65 DEG C in temperature after dry 50min, modified meerschaum is obtained；Sawdust is moved into retort, and into retort with
The rate of 25mL/min is passed through nitrogen, under conditions of being 500 DEG C in temperature after low-temperature carbonization 80min, obtains charing sawdust, will carbonize
Sawdust and ethyl orthosilicate in mass ratio 1：5 mixing are 65 DEG C in temperature, under conditions of rotating speed is 350r/min, are stirred
After 50min, filtering obtains pretreatment sawdust, by pretreatment sawdust and paraffin in mass ratio 1：6 mixing, in temperature be 65 DEG C, rotating speed
Under conditions of 260rmin, after being stirred 35min, sawdust mineral wax mixture is obtained, by sawdust mineral wax mixture Freezing smashing,
Obtain modified wood chips；Count in parts by weight, weigh successively 70 parts mixing magnesia, 8 parts of sodium tripolyphosphates, 6 parts of aluminum-spinels, 3 parts
Kyanite, 8 parts of zirconium oxides, 18 parts of bonding agents, 25 parts of modified meerschaums, 15 parts of modified wood chips and 8 parts of pretreatment graphene oxides,
Mixing magnesia is added in blender, and add in sodium tripolyphosphate into blender successively, magnesia spinel magnesium, spinelle, oxidation
Zirconium, bonding agent, modified meerschaum, modified wood chips and pretreatment graphene oxide are 35 DEG C in temperature, and rotating speed is 300r/min's
Under the conditions of be stirred after 30min to get gunning refractory.The sawdust grain size is 2mm.The paraffin is that carbon atom number is 20~30
Mineral wax mixture.The preparation method of the mixing magnesia be by magnesia that grain size is 3mm and the magnesia that grain size is 0.099mm by
Mass ratio 1：1 mixing, and the grain size for adding in 0.4 times of the magnesia quality that grain size is 3mm is less than the magnesia of 0.088mm, is stirred,
Magnesia must be mixed.The aluminum-spinel grain size is 2.0mm.The kyanite grain size is 1.2mm.The preparation side of the bonding agent
Method is by clay and aluminate cement in mass ratio 1：4 mixing, and the Alpha-alumina of 0.3 times of clay quality is added in, it is stirred
Obtain bonding agent.The preparation method of the pretreatment graphene oxide is by graphene oxide Ultrasonic Pulverization, and drying obtains pretreatment oxygen
Graphite alkene.
Example 3
Sawdust is moved into retort, and be passed through nitrogen into retort with the rate of 25mL/min, in the condition that temperature is 500 DEG C
After lower low-temperature carbonization 80min, charing sawdust is obtained, by charing sawdust and ethyl orthosilicate in mass ratio 1：5 mixing, in temperature be 65
DEG C, under conditions of rotating speed is 350r/min, after being stirred 50min, filtering obtains pretreatment sawdust, by pretreatment sawdust and stone
Wax in mass ratio 1：6 mixing are 65 DEG C in temperature, under conditions of rotating speed is 260rmin, after being stirred 35min, obtain sawdust stone
Wax mixture by sawdust mineral wax mixture Freezing smashing, obtains modified wood chips；It counts in parts by weight, weighs 20 parts of entringite successively,
70 parts of mixing magnesia, 8 parts of sodium tripolyphosphates, 6 parts of aluminum-spinels, 3 parts of kyanites, 8 parts of zirconium oxides, 18 parts of bonding agents, 15 parts
Modified wood chips and 8 parts of pretreatment graphene oxides, entringite are mixed in mixing magnesia in blender, and successively to blender
Middle addition sodium tripolyphosphate, magnesia spinel magnesium, spinelle, zirconium oxide, bonding agent, modified wood chips and pretreatment graphene oxide,
It it is 35 DEG C in temperature, rotating speed is stirred after 30min under conditions of being 300r/min to get gunning refractory.The sawdust grain size is
2mm.The paraffin is the mineral wax mixture that carbon atom number is 20~30.The preparation method of the mixing magnesia is to be by grain size
The magnesia of 3mm and the magnesia in mass ratio 1 that grain size is 0.099mm：1 mixing, and add in 0.4 times of the magnesia quality that grain size is 3mm
Grain size be less than 0.088mm magnesia, be stirred, obtain mixing magnesia.The aluminum-spinel grain size is 2.0mm.The indigo plant
Spar grain size is 1.2mm.The preparation method of the bonding agent is by clay and aluminate cement in mass ratio 1：4 mixing, and add
Enter the Alpha-alumina of 0.3 times of clay quality, be stirred to obtain bonding agent.The preparation method of the pretreatment graphene oxide is will
Graphene oxide Ultrasonic Pulverization, it is dry, obtain pretreatment graphene oxide.
Example 4
By sepiolite and water in mass ratio 1：10 are mixed in beaker, and the Pasteur of 0.6 times of sepiolite quality is added in into beaker
Bacillus, the urea and the magnesium nitrate of 0.2 times of sepiolite quality that 0.2 times of sepiolite quality are 40 DEG C in temperature, and rotating speed is
Under conditions of 250r/min, after being stirred 2h, sepiolite mixture is obtained, sepiolite mixture is moved into Rotary Evaporators, in
Temperature is 65 DEG C, rotating speed 150r/min, under conditions of pressure is 600kPa after concentrated by rotary evaporation 2h, obtains revolving object, will rotate object
Under conditions of being 65 DEG C in temperature after dry 50min, modified meerschaum is obtained；It counts in parts by weight, weighs 20 parts of entringite successively,
70 parts of mixing magnesia, 8 parts of sodium tripolyphosphates, 6 parts of aluminum-spinels, 3 parts of kyanites, 8 parts of zirconium oxides, 18 parts of bonding agents, 25 parts
Modified meerschaum and 8 parts of pretreatment graphene oxides, entringite are mixed in mixing magnesia in blender, and successively to stirring
Sodium tripolyphosphate, magnesia spinel magnesium, spinelle, zirconium oxide, bonding agent, modified meerschaum and pretreatment graphite oxide are added in machine
Alkene is 35 DEG C in temperature, and rotating speed is stirred after 30min under conditions of being 300r/min to get gunning refractory.The mixing magnesia
Preparation method be 0.099mm with grain size by magnesia that grain size is 3mm magnesia in mass ratio 1：1 mixing, and add in grain size
The grain size of 0.4 times of the magnesia quality for 3mm is less than the magnesia of 0.088mm, is stirred, obtains mixing magnesia.The magnalium point is brilliant
Stone grain diameter is 2.0mm.The kyanite grain size is 1.2mm.The preparation method of the bonding agent is by clay and aluminate cement
In mass ratio 1：4 mixing, and the Alpha-alumina of 0.3 times of clay quality is added in, it is stirred to obtain bonding agent.The pretreatment oxidation
The preparation method of graphene is by graphene oxide Ultrasonic Pulverization, and drying obtains pretreatment graphene oxide.
Example 5
By sepiolite and water in mass ratio 1：10 are mixed in beaker, and the Pasteur of 0.6 times of sepiolite quality is added in into beaker
Bacillus, the urea and the magnesium nitrate of 0.2 times of sepiolite quality that 0.2 times of sepiolite quality are 40 DEG C in temperature, and rotating speed is
Under conditions of 250r/min, after being stirred 2h, sepiolite mixture is obtained, sepiolite mixture is moved into Rotary Evaporators, in
Temperature is 65 DEG C, rotating speed 150r/min, under conditions of pressure is 600kPa after concentrated by rotary evaporation 2h, obtains revolving object, will rotate object
Under conditions of being 65 DEG C in temperature after dry 50min, modified meerschaum is obtained；Sawdust is moved into retort, and into retort with
The rate of 25mL/min is passed through nitrogen, under conditions of being 500 DEG C in temperature after low-temperature carbonization 80min, obtains charing sawdust, will carbonize
Sawdust and ethyl orthosilicate in mass ratio 1：5 mixing are 65 DEG C in temperature, under conditions of rotating speed is 350r/min, are stirred
After 50min, filtering obtains pretreatment sawdust, by pretreatment sawdust and paraffin in mass ratio 1：6 mixing, in temperature be 65 DEG C, rotating speed
Under conditions of 260rmin, after being stirred 35min, sawdust mineral wax mixture is obtained, by sawdust mineral wax mixture Freezing smashing,
Obtain modified wood chips；It counts in parts by weight, weighs 20 parts of entringite, 70 parts of mixing magnesia, 8 parts of sodium tripolyphosphates, 6 parts of magnaliums successively
Spinelle, 3 parts of kyanites, 8 parts of zirconium oxides, 18 parts of bonding agents, 25 parts of modified meerschaums, 15 parts of modified wood chips, by entringite with
Mixing magnesia is mixed in blender, and add in sodium tripolyphosphate into blender successively, magnesia spinel magnesium, spinelle, oxidation
Zirconium, bonding agent, modified meerschaum, modified wood chips are 35 DEG C in temperature, and rotating speed is stirred under conditions of being 300r/min
To get gunning refractory after 30min.The sawdust grain size is 2mm.The paraffin is the mineral wax mixture that carbon atom number is 20~30.
The magnesia in mass ratio 1 that it is 0.099mm with grain size by the magnesia that grain size is 3mm that the preparation method of the mixing magnesia, which is,：1 is mixed
It closes, and the grain size for adding in 0.4 times of the magnesia quality that grain size is 3mm is less than the magnesia of 0.088mm, is stirred, obtains mixing magnesia.
The aluminum-spinel grain size is 2.0mm.The kyanite grain size is 1.2mm.The preparation method of the bonding agent is by clay
With aluminate cement in mass ratio 1：4 mixing, and the Alpha-alumina of 0.3 times of clay quality is added in, it is stirred to obtain bonding agent.
Comparative example：The gunning refractory of Yingkou Refractory Co., ltd production.
The gunning refractory of 1 to 5 gained of example and comparative example product are subjected to performance detection, specific detection method is as follows：
1. intensity：The sample block of moulding by casting 160mm × 40mm × 40mm in three gang moulds detects the resistance to compression after its 1500 DEG C firings
Intensity；
2. resistance to slag corrosion：Moulding by casting anti-slag crucible detects its Linear change rate after 1500 DEG C of anti-blast furnace scouring.
Specific testing result is as shown in table 1：
Table 1：Intensity and the specific testing result of slag corrosion resistance
| Detection project | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Compression strength/MPa | 25.1 | 22.5 | 18.7 | 16.3 | 15.4 | 10.8 |
| Linear change rate/% | -0.11 | -0.48 | -0.98 | -1.22 | -1.34 | -2.37 |
By 1 testing result of table it is found that gunning refractory prepared by technical solution of the present invention has the characteristics that intensity and resistance to slag corrosion,
It has broad prospects in the development of refractories industry.
Claims (8)
1. a kind of preparation method of gunning refractory, it is characterised in that specifically preparation process is：
（1）By sepiolite and water in mass ratio 1：8~1：10 mixing, and add in Pasteur's gemma of 0.5~0.6 times of sepiolite quality
Bacillus, the urea and the magnesium nitrate of 0.1~0.2 times of sepiolite quality that 0.1~0.2 times of sepiolite quality, after being stirred, revolving
Concentration, it is dry, obtain modified meerschaum；
（2）Sawdust in low temperature environment is carbonized, obtains charing sawdust, by charing sawdust and ethyl orthosilicate in mass ratio 1：3~
1：5 mixing, filtering obtain pretreatment sawdust, by pretreatment sawdust and paraffin in mass ratio 1：5~1：6 mixing, Freezing smashing obtain
Modified wood chips；
（3）It counts in parts by weight, weighs 10~20 parts of entringite successively, 60~70 parts of mixing magnesia, 2~8 parts of sodium tripolyphosphates,
2~6 parts of aluminum-spinels, 1~3 part of kyanite, 5~8 parts of zirconium oxides, 10~18 parts of bonding agents, 12~25 parts of modified meerschaums,
10~15 parts of modified wood chips and 5~8 parts of pretreatment graphene oxides, entringite is mixed, and sequentially add three with mixing magnesia
Polyphosphate sodium, magnesia spinel magnesium, spinelle, zirconium oxide, bonding agent, modified meerschaum, modified wood chips and pretreatment graphite oxide
Alkene, to get gunning refractory after being stirred.
2. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（2）The sawdust grain size
For 1~2mm.
3. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（2）The paraffin is carbon
Atomicity is 20~30 mineral wax mixture.
4. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（3）The mixing magnesia
Preparation method be 0.088~0.099mm with grain size by magnesia that grain size is 1~3mm magnesia in mass ratio 2：1~1：1
Mixing, and the grain size for adding in 0.3~0.4 times of the magnesia quality that grain size is 1~3mm is less than the magnesia of 0.088mm, is stirred,
Magnesia must be mixed.
5. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（3）The magnalium point is brilliant
Stone grain diameter is 0.2~2.0mm.
6. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（3）The aquamaine stone grain
Diameter is 0.1~1.2mm.
7. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（3）The bonding agent
Preparation method is by clay and aluminate cement in mass ratio 1：3~1：4 mixing, and add in the α of 0.1~0.3 times of clay quality-
Aluminium oxide is stirred to obtain bonding agent.
8. a kind of preparation method of gunning refractory according to claim 1, it is characterised in that：Step（3）The pretreatment oxygen
The preparation method of graphite alkene is by graphene oxide Ultrasonic Pulverization, and drying obtains pretreatment graphene oxide.
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| CN110467384A (en) * | 2019-09-10 | 2019-11-19 | 宋文奇 | A kind of light-high-strength concrete and preparation method thereof |
| CN114853485A (en) * | 2022-03-28 | 2022-08-05 | 唐山鑫亚耐火材料有限公司 | Ladle down nozzle and preparation method thereof |
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| CN105884229A (en) * | 2016-04-13 | 2016-08-24 | 苏州思创源博电子科技有限公司 | Concrete aggregate recycling and modifying method |
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| JP2000351675A (en) * | 1999-06-11 | 2000-12-19 | Kurosaki Harima Corp | Refractory material for wet gunning application |
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