CN103936435A - Magnesium-calcium spinel refractory brick and preparation method thereof - Google Patents
Magnesium-calcium spinel refractory brick and preparation method thereof Download PDFInfo
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- CN103936435A CN103936435A CN201410115792.7A CN201410115792A CN103936435A CN 103936435 A CN103936435 A CN 103936435A CN 201410115792 A CN201410115792 A CN 201410115792A CN 103936435 A CN103936435 A CN 103936435A
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Abstract
The invention discloses a magnesium-calcium spinel refractory brick and a preparation method thereof. The magnesium-calcium spinel refractory brick is prepared mainly from 86-95% by weight of magnesium-calcium clinker, 4-9% by weight of magnesia-alumina spinel and 1-5% by weight of paraffin by performing mixing, molding and high-temperature calcining. The specific preparation method of the magnesium-calcium spinel refractory brick comprises the following steps: a) crushing raw materials, mainly independently crushing magnesium-calcium clinker and magnesia-alumina spinel, or on the basis of purchasing powder or granular magnesia-alumina spinel, only independently crushing magnesium-calcium clinker; b) mixing raw materials, mixing magnesium-calcium clinker and magnesia-alumina spinel according to the ratio in a heating state, wherein the heating temperature is 75-85 DEG C, then fully stirring and mixing, then adding paraffin according to the ratio, fully stirring, and cooling to 60-70 DEG C and discharging; c) molding, putting the mixed material in a molding mold chamber for pressurization molding; d) sintering at a high temperature, specifically sintering at a high temperature of 1500 DEG C in a furnace for at least 16 h, so as to obtain a finished product; and e) discharging the finished product from the furnace. The magnesium-calcium spinel refractory brick has the characteristics of low energy consumption, low cost, light weight, high-temperature resistance, high efficiency, energy saving, long service life and the like.
Description
Technical field
That the present invention relates to is a kind of magnesium calcium spinelle refractory brick and preparation method, belongs to refractory brick and preparing technical field.
Background technology
Industrial Stoves are the main energy consumption equipment in industrial production, in prior art, mainly contain refractory fibre, Al for the lagging material of various inner lining of kiln
2o
3-Sio
2be lightweight refractory and alumina bubble brick etc., wherein refractory fibre and Al
2o
3-Sio
2it is the Industrial Stoves environment that lightweight refractory is mainly used in middle low temperature; Alumina bubble brick is in a large number for 1600 DEG C of above high temperature kilns.
The manufacturing process of described alumina bubble brick need experience energy consumption process three times, these three energy consumption process have caused a large amount of energy consumptions, thereby manufacturing cost is high, and the density of alumina bubble brick is larger, heat storage capacity is stronger, and rate of heat transfer is very fast simultaneously, and heat lost by radiation is large, thereby be used in kiln, will increase the thermal losses of kiln.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, and provide a kind of energy consumption low, low cost, lightweight, high temperature resistant, energy-efficient, magnesium calcium spinelle refractory brick and the preparation method of long service life.
The object of the invention is to complete by following technical solution, described magnesium calcium spinelle refractory brick, it, and is made up according to following weight percentage mix, moulding of calcium magnesia sand, magnesium-aluminium spinel and paraffin after high-temperature calcination;
Calcium magnesia sand 86-95%
Magnesium-aluminium spinel 4-9%
Paraffin 1-5%
Said ratio is to be absolutely as the criterion.
The preferred technical scheme of the present invention is: 92% calcium magnesia sand, 6% magnesium-aluminium spinel and 2% paraffin.
A preparation method for magnesium calcium spinelle refractory brick described above, this preparation method comprises the steps:
A) pulverize raw material, be mainly that calcium magnesia sand and magnesium-aluminium spinel are pulverized separately, or choosing on the basis of powder or particulate state magnesium-aluminium spinel, only calcium magnesia sand carried out to independent pulverization process;
B) mixing raw material first mixes calcium magnesia sand and magnesium-aluminium spinel in proportion under heated condition, and Heating temperature, at 75-85 DEG C, after being fully uniformly mixed, then adds paraffin in proportion, again fully stirs, be then cooled to 60-70 DEG C after discharging;
C) moulding, puts into shaping mold cavity extrusion forming by compound;
D) high temperature burns till, and at least in kiln, under 1500 DEG C of high temperature, makes finished product through at least 16 hours burn till;
E) finished product kiln discharge.
The present invention further scheme is:
Step a) in, it is 5-8mm, 3-5mm, 1-3mm, 0-1mm and calcium magnesia sand grain or the powder that is less than 0.088mm that the pulverizing of calcium magnesia sand is made to specification, to magnesium-aluminium spinel pulverize or the specification of outsourcing for being less than 0.088mm;
In step b), be first 5-8mm, 3-5mm, 1-3mm, 0-1mm calcium magnesia sand grain or powder mix and blend 2-5 minute by specification, again specification is less than to 0.088 calcium magnesia sand and magnesium-aluminium spinel and mixes 12-18 minute under heated condition, then add in proportion paraffin mix and blend 12-18 minute, discharging;
Steps d) in, the compound after extrusion forming is admitted to point three sections of heating after kiln and burns till, and first paragraph is preheating section, and temperature is heated to 1000 DEG C from 600, and the hold-time is at 12-15 hour; Second segment is the section of burning till, and firing temperature is more than 1500 DEG C, and the time is 16-20 hour; The 3rd section is cooling section, naturally cools to 200 DEG C from firing temperature, is comprising that keeping temperature-time is 26-30 hour altogether.
The invention belongs to the one of prior art is improved, it is low that it has energy consumption, low cost, and lightweight, high temperature resistant, energy-efficient, the features such as long service life.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail: magnesium calcium spinelle refractory brick of the present invention, and it, and is made up according to following weight percentage mix, moulding of calcium magnesia sand, magnesium-aluminium spinel and paraffin after high-temperature calcination;
Calcium magnesia sand 86-95%
Magnesium-aluminium spinel 4-9%
Paraffin 1-5%
Said ratio is to be absolutely as the criterion.
A preparation method for magnesium calcium spinelle refractory brick described above, this preparation method comprises the steps:
A) pulverize raw material, be mainly that calcium magnesia sand and magnesium-aluminium spinel are pulverized separately, or choosing on the basis of powder or particulate state magnesium-aluminium spinel, only calcium magnesia sand carried out to independent pulverization process;
B) mixing raw material first mixes calcium magnesia sand and magnesium-aluminium spinel in proportion under heated condition, and Heating temperature, at 75-85 DEG C, after being fully uniformly mixed, then adds paraffin in proportion, again fully stirs, be then cooled to 60-70 DEG C after discharging;
C) moulding, puts into shaping mold cavity extrusion forming by compound;
D) high temperature burns till, and at least in kiln, under 1500 DEG C of high temperature, makes finished product through at least 16 hours burn till;
E) finished product kiln discharge.
The present invention further scheme is:
Step a) in, it is 5-8mm, 3-5mm, 1-3mm, 0-1mm and calcium magnesia sand grain or the powder that is less than 0.088mm that the pulverizing of calcium magnesia sand is made to specification, to magnesium-aluminium spinel pulverize or the specification of outsourcing for being less than 0.088mm;
In step b), be first 5-8mm, 3-5mm, 1-3mm, 0-1mm calcium magnesia sand grain or powder mix and blend 2-5 minute by specification, again specification is less than to 0.088 calcium magnesia sand and magnesium-aluminium spinel and mixes 12-18 minute under heated condition, then add in proportion paraffin mix and blend 12-18 minute, discharging;
Steps d) in, the compound after extrusion forming is admitted to point three sections of heating after kiln and burns till, and first paragraph is preheating section, and temperature is heated to 1000 DEG C from 600, and the hold-time is at 12-15 hour; Second segment is the section of burning till, and firing temperature is more than 1500 DEG C, and the time is 16-20 hour; The 3rd section is cooling section, naturally cools to 200 DEG C from firing temperature, is comprising that keeping temperature-time is 26-30 hour altogether.
Embodiment 1: magnesium calcium spinelle refractory brick of the present invention, it, and is made up according to following weight percentage mix, moulding of calcium magnesia sand, magnesium-aluminium spinel and paraffin after high-temperature calcination: 92% calcium magnesia sand, 6% magnesium-aluminium spinel and 2% paraffin.
A preparation method for magnesium calcium spinelle refractory brick, it comprises the steps:
A) pulverize raw material, be mainly that calcium magnesia sand and magnesium-aluminium spinel are pulverized separately, or choosing on the basis of powder or particulate state magnesium-aluminium spinel, only calcium magnesia sand carried out to independent pulverization process; It is 5-8mm, 3-5mm, 1-3mm, 0-1mm and calcium magnesia sand grain or the powder that is less than 0.088mm that the pulverizing of calcium magnesia sand is made to specification, to magnesium-aluminium spinel pulverize or the specification of outsourcing for being less than 0.088mm;
B) mixing raw material first mixes calcium magnesia sand and magnesium-aluminium spinel in proportion under heated condition, and Heating temperature, at 75-85 DEG C, after being fully uniformly mixed, then adds paraffin in proportion, again fully stirs, be then cooled to 60-70 DEG C after discharging;
More specifically: be first 5-8mm, 3-5mm, 1-3mm, 0-1mm calcium magnesia sand grain or powder mix and blend 2-5 minute by specification, again specification is less than to 0.088 calcium magnesia sand and magnesium-aluminium spinel and mixes 12-18 minute under heated condition, add in proportion again paraffin mix and blend 12-18 minute, discharging;
C) moulding, puts into shaping mold cavity extrusion forming by compound;
D) high temperature burns till, and at least in kiln, under 1500 DEG C of high temperature, makes finished product through at least 16 hours burn till; More specifically: the compound after extrusion forming is admitted to point three sections of heating after kiln and burns till, and first paragraph is preheating section, temperature is heated to 1000 DEG C from 600, and the hold-time was at 14 hours; Second segment is the section of burning till, and firing temperature is more than 1500 DEG C, and the time is 18 hours; The 3rd section is cooling section, naturally cools to 200 DEG C from firing temperature, is comprising that keeping temperature-time is 28 hours altogether.
Embodiment 2 magnesium calcium of the present invention spinelle refractory brick, it, and is made up according to following weight percentage mix, moulding of calcium magnesia sand, magnesium-aluminium spinel and paraffin after high-temperature calcination; 86% calcium magnesia sand, 9% magnesium-aluminium spinel and 5% paraffin.
A preparation method for magnesium calcium spinelle refractory brick, it comprises the steps:
A) pulverize raw material, be mainly that calcium magnesia sand and magnesium-aluminium spinel are pulverized separately, or choosing on the basis of powder or particulate state magnesium-aluminium spinel, only calcium magnesia sand carried out to independent pulverization process; Specifically: it is 5-8mm, 3-5mm, 1-3mm, 0-1mm and calcium magnesia sand grain or the powder that is less than 0.088mm that the pulverizing of calcium magnesia sand is made to specification, magnesium-aluminium spinel is pulverized or the specification of outsourcing for being less than 0.088mm;
B) mixing raw material first mixes calcium magnesia sand and magnesium-aluminium spinel in proportion under heated condition, and Heating temperature, at 75-85 DEG C, after being fully uniformly mixed, then adds paraffin in proportion, again fully stirs, be then cooled to 60-70 DEG C after discharging; Specifically: be first 5-8mm, 3-5mm, 1-3mm, 0-1mm calcium magnesia sand grain or powder mix and blend 2-5 minute by specification, again specification is less than to 0.088 calcium magnesia sand and magnesium-aluminium spinel and mixes 12-18 minute under heated condition, add in proportion again paraffin mix and blend 12-18 minute, discharging;
C) moulding, puts into shaping mold cavity extrusion forming by compound;
D) high temperature burns till, and at least in kiln, under 15000 DEG C of high temperature, makes finished product through at least 16 hours burn till; Specifically: the compound after extrusion forming is admitted to point three sections of heating after kiln and burns till, and first paragraph is preheating section, temperature is heated to 1000 DEG C from 600, and the hold-time was at 12 hours; Second segment is the section of burning till, and firing temperature is more than 1500 DEG C, and the time is 16 hours; The 3rd section is cooling section, naturally cools to 200 DEG C from firing temperature, is comprising that keeping temperature-time is 26 hours altogether.
Embodiment 3: magnesium calcium spinelle refractory brick of the present invention, it, and is made up according to following weight percentage mix, moulding of calcium magnesia sand, magnesium-aluminium spinel and paraffin after high-temperature calcination: 99% calcium magnesia sand, 4% magnesium-aluminium spinel and 1% paraffin.
A preparation method for magnesium calcium spinelle refractory brick, it comprises the steps:
A) pulverize raw material, be mainly that calcium magnesia sand and magnesium-aluminium spinel are pulverized separately, or choosing on the basis of powder or particulate state magnesium-aluminium spinel, only calcium magnesia sand carried out to independent pulverization process; Specifically comprise: it is 5-8mm, 3-5mm, 1-3mm, 0-1mm and calcium magnesia sand grain or the powder that is less than 0.088mm that the pulverizing of calcium magnesia sand is made to specification, to magnesium-aluminium spinel pulverize or the specification of outsourcing for being less than 0.088mm;
B) mixing raw material first mixes calcium magnesia sand and magnesium-aluminium spinel in proportion under heated condition, and Heating temperature, at 75-85 DEG C, after being fully uniformly mixed, then adds paraffin in proportion, again fully stirs, be then cooled to 60-70 DEG C after discharging; Specifically comprise: be first 5-8mm, 3-5mm, 1-3mm, 0-1mm calcium magnesia sand grain or powder mix and blend 2-5 minute by specification, again specification is less than to 0.088 calcium magnesia sand and magnesium-aluminium spinel and mixes 12-18 minute under heated condition, add in proportion again paraffin mix and blend 12-18 minute, discharging;
C) moulding, puts into shaping mold cavity extrusion forming by compound;
D) high temperature burns till, and at least in kiln, under 15000 DEG C of high temperature, makes finished product through at least 16 hours burn till; Specifically comprise: the compound after extrusion forming is admitted to point three sections of heating after kiln and burns till, and first paragraph is preheating section, temperature is heated to 1000 DEG C from 600, and the hold-time was at 15 hours; Second segment is the section of burning till, and firing temperature is more than 1500 DEG C, and the time is 20 hours; The 3rd section is cooling section, naturally cools to 200 DEG C from firing temperature, is comprising that keeping temperature-time is 30 hours altogether.
E) finished product kiln discharge.
Claims (4)
1. a magnesium calcium spinelle refractory brick, is characterized in that: it, and is made up according to following weight percentage mix, moulding of calcium magnesia sand, magnesium-aluminium spinel and paraffin after high-temperature calcination;
Calcium magnesia sand 86-95%
Magnesium-aluminium spinel 4-9%
Paraffin 1-5%
Said ratio is to be absolutely as the criterion.
2. magnesium calcium spinelle refractory brick according to claim 1, is characterized in that it is by 92% calcium magnesia sand, and 6% magnesium-aluminium spinel and 2% paraffin mix by weight percentage, moulding, and make after high-temperature calcination.
3. a preparation method for magnesium calcium spinelle refractory brick described in claim 1 or 2, is characterized in that described preparation method comprises the steps:
A) pulverize raw material, be mainly that calcium magnesia sand and magnesium-aluminium spinel are pulverized separately, or choosing on the basis of powder or particulate state magnesium-aluminium spinel, only calcium magnesia sand carried out to independent pulverization process;
B) mixing raw material first mixes calcium magnesia sand and magnesium-aluminium spinel in proportion under heated condition, and Heating temperature, at 75-85 DEG C, after being fully uniformly mixed, then adds paraffin in proportion, again fully stirs, be then cooled to 60-70 DEG C after discharging;
C) moulding, puts into shaping mold cavity extrusion forming by compound;
D) high temperature burns till, and at least in kiln, under 1500 DEG C of high temperature, makes finished product through at least 16 hours burn till;
E) finished product kiln discharge.
4. the preparation method of magnesium calcium spinelle refractory brick according to claim 3, is characterized in that described step:
Step a) in, it is 5-8mm, 3-5mm, 1-3mm, 0-1mm and calcium magnesia sand grain or the powder that is less than 0.088mm that the pulverizing of calcium magnesia sand is made to specification, to magnesium-aluminium spinel pulverize or the specification of outsourcing for being less than 0.088mm;
In step b), be first 5-8mm, 3-5mm, 1-3mm, 0-1mm calcium magnesia sand grain or powder mix and blend 2-5 minute by specification, again specification is less than to 0.088 calcium magnesia sand and magnesium-aluminium spinel and mixes 12-18 minute under heated condition, then add in proportion paraffin mix and blend 12-18 minute, discharging;
Steps d) in, the compound after extrusion forming is admitted to point three sections of heating after kiln and burns till, and first paragraph is preheating section, and temperature is heated to 1000 DEG C from 600, and the hold-time is at 12-15 hour; Second segment is the section of burning till, and firing temperature is more than 1500 DEG C, and the time is 16-20 hour; The 3rd section is cooling section, naturally cools to 200 DEG C from firing temperature, is comprising that keeping temperature-time is 26-30 hour altogether.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060906A (en) * | 2015-07-31 | 2015-11-18 | 王有才 | Magnesium aluminate spinel screen protection layer and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060906A (en) * | 2015-07-31 | 2015-11-18 | 王有才 | Magnesium aluminate spinel screen protection layer and production method thereof |
| CN105060906B (en) * | 2015-07-31 | 2018-05-08 | 王有才 | A kind of magnesium aluminate spinel screen protection layer and preparation method thereof |
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Application publication date: 20140723 |