CN104496534A - High-strength magnesite shale porous fireproof brick and production method thereof - Google Patents
High-strength magnesite shale porous fireproof brick and production method thereof Download PDFInfo
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- CN104496534A CN104496534A CN201410846152.3A CN201410846152A CN104496534A CN 104496534 A CN104496534 A CN 104496534A CN 201410846152 A CN201410846152 A CN 201410846152A CN 104496534 A CN104496534 A CN 104496534A
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Abstract
The invention discloses a high-strength magnesite shale porous fireproof brick and a production method thereof. The production method of the high-strength magnesite shale porous fireproof brick is characterized by comprising the following steps: adding 10-20 percent by mass of magnesite powder and 3-12 percent by mass of quicklime powder, 0.5-1.5 percent by mass of aluminum powder or ion powder into shale powder; based on the material prepared by mixing the raw materials, adding water of which the temperature is 40 to 505 DEG C and the mass percentage is 50% to 60%, fully stirring for 3-5 minutes, and standing the uniformly-stirred material for 1-2 hours; putting the uniformly-stirred material into a brick making mold for making a blank body; by adopting a secondary roasting method, firstly arranging the blank at the temperature of 700 DEG C and keeping the temperature for 30 minutes; heating to increase the temperature to 1100 DEG C by secondary roasting and keeping the temperature for 8-12 hours to obtain the high-strength magnesite shale porous fireproof brick. The production method has the advantages of reducing the shale consumption for producing high-quality fireproof bricks, greatly enhancing the compressive strength and the rupture strength of building blocks on the premise of saving the shale, and overcoming the defects that the exiting common shale porous brick is easy to break, low in strength, easy to cause drop of the four corners during transportation, low in bonding strength, poor in fireproof performance, inapplicable to bearing walls and the like.
Description
Technical field
The present invention relates to refractory brick and production method thereof, particularly a kind of high strength magnesite shale pore refractory brick and production method thereof.
Background technology
Common shale brick and production method thereof be by shale pulverize, shaping after, follow procedure carries out roasting and makes.Common shale brick is not only from great, and resistance to compression, folding strength is low, resistivity against fire is poor, and in producing, consume a large amount of shale, waste resource.
Summary of the invention
Object of the present invention is just to provide a kind of high strength magnesite shale pore refractory brick and production method thereof
Solution of the present invention is such:
In shale, add the magnesite of different mass mark, research shows: generation CO2 is decomposed in magnesite roasting first 700 DEG C-800 DEG C, and gas plays the effect of pore-forming material and whipping agent.SiO2, Al2O3 complete reaction at 1000 DEG C of-1 200 DEG C of temperature in re-baking MgO and shale mainly generates cordierite material and a small amount of forsterite.Decompose SiO2 in MgO and the shale generated react when magnesite addition is too much, produce liquid phase too much, cause part holes to close, the apparent porosity making to burn till rear sample is first increase the trend reduced afterwards with the increase of magnesite addition.Optimize firing process condition magnesium ore deposit and add massfraction 10%-20%, be incubated 8-12h in 1000 DEG C-1 200 DEG C.Prepare that apparent porosity reaches 48%, aperture is 20-40 μm, volume density is 0.84g/cm3, ultimate compression strength is 30-45MPa, folding strength is the high-strength magnesite shale pore refractory brick material of 22.5-32.5MPa, slip resistance 0.30-0.65MPa.
Based on above-mentioned principle, a kind of high strength magnesite shale of the present invention pore refractory brick, make primarily of the following raw material containing mass ratio: in shale powder, add the magnesite powder of mass ratio 10%-20%, the calcium lime powder of mass ratio 3%-12%, the aluminium powder of mass ratio 0.5-1.5 or iron powder, the material for preparing is mixed for benchmark with above-mentioned raw materials, adding temperature is that 40 DEG C-505 DEG C massfraction 50%-60% water fully stir 3-5 minute, and the material that will stir leaves standstill 1h-2h; What stir puts into brick-making mould base body, takes re-baking method, first base is added 700 DEG C of insulations 30 minutes, and heating temperatures keeps obtaining for 8-12 hour to 1100 DEG C by re-baking.
Its production method of a kind of high strength magnesite shale of the present invention pore refractory brick, comprises step:
(1) batching step: make primarily of the following raw material containing mass ratio: add the magnesite powder of mass ratio 10%-20%, the calcium lime powder of mass ratio 3%-12%, the aluminium powder of mass ratio 0.5-1.5 or iron powder and carry out mix in shale powder;
(2) base step: with the material prepared for benchmark, adding temperature is that 40 DEG C-505 DEG C massfraction 50%-60% water fully stir 3-5 minute, and the material that will stir leaves standstill 1h-2h; What stir puts into brick-making mould base body;
(3) calcination steps: double roasting technique is taked in roasting, is first incubated 30-50 minute under 700 DEG C of-800 DEG C of conditions, then temperature is increased to 1000 DEG C-1200 DEG C and carries out roasting 8-12 hour.Sintering temperature controls at 1000 DEG C-1200 DEG C and keeps 8-12 hour.
Technical scheme also comprises more specifically: in described base step, adopts brick one modeling method, the material after the 3-5 minute standing 1-2h that stirs directly is entered mould without the need to drying, and feeding quantity accounts for mould volume 60%-70%.
Advantage of the present invention is the 10%-20% that magnesite powder incorporation accounts for brick weight mark, and different mass divides at maturing temperature 750 DEG C first, and at re-baking 1100 DEG C, the resistance to compression of brick body, folding strength, apparent porosity, brick volume density are as Fig. 1.High-strength magnesite shale pore refractory brick apparent porosity can up to 48% as shown in Figure 1, and volume density is 0.84-0.98
, normal temperature ultimate compression strength is 30-45MPa, and folding strength is the high-strength magnesite shale pore refractory brick of 22.5-32.5 MPa; Not only possesses the advantage reducing and consume and produce high quality refractory brick shale, but also on the basis of saving shale, greatly can improve the pressure-proof and snap-resistent intensity of building block, overcome that existing general shale porous brick is easy to break, intensity is low, in carrying, corner comes off, cohesive strength is low, and fire performance difference can not be used for the defects such as bearing wall.
Accompanying drawing explanation
Fig. 1 is that the resistance to compression of the present invention's high-strength magnesite shale pore refractory brick, anti-folding, void content, volume density are with magnesite quality incorporation change list.
Embodiment
A kind of high strength magnesite shale pore refractory brick, make primarily of the following raw material containing mass ratio: in shale powder, add the magnesite powder of mass ratio 10%-20%, the calcium lime powder of mass ratio 3%-12%, the aluminium powder of mass ratio 0.5-1.5 or iron powder, the material for preparing is mixed for benchmark with above-mentioned raw materials, adding temperature is that 40 DEG C-505 DEG C massfraction 50%-60% water fully stir 3-5 minute, and the material that will stir leaves standstill 1h-2h; What stir puts into brick-making mould base body, takes re-baking method, first base is added 700 DEG C of insulations 30 minutes, and heating temperatures keeps obtaining for 8-12 hour to 1100 DEG C by re-baking.
Its production method of high strength magnesite shale pore refractory brick, carry out according to the following steps:
(1), respectively shale and magnesite are pulverized 80 mesh sieves and obtain slate flour and magnesite powder;
(2) batching step: add the magnesite powder of mass ratio 10%-20%, the calcium lime powder of mass ratio 3%-12%, the aluminium powder of mass ratio 0.5-1.5 or iron powder and carry out mix in shale powder;
(3) base step: with the material prepared for benchmark, adding temperature is that 40 DEG C-505 DEG C massfraction 50%-60% water fully stir 3-5 minute, and the material that will stir leaves standstill 1h-2h; Stir, adopt brick one modeling method, the material after the 3-5 minute standing 1-2h that stirs directly is entered mould without the need to drying, and feeding quantity accounting for mould volume 60%-70%, putting into brick-making mould base body;
(4) calcination steps: double roasting technique is taked in roasting, is first incubated 30-50 minute under 700 DEG C of-800 DEG C of conditions, then temperature is increased to 1000 DEG C-1200 DEG C and carries out roasting 8-12 hour.Sintering temperature controls at 1000 DEG C-1200 DEG C and keeps 8-12 hour.
The specification making product innovation by technique scheme is 240mm × 240mm × 90mm, 240mm × 115mm × 90mm, 240mm × 115mm × 60mm, 390mm × 240mm × 90mm, 390mm × 115mm × 90mm, 240mm × 190mm × 115mm, 390mm × 240mm × 240mm, 390mm × 115mm × 240mm or other specifications.The shape of this product has two kinds, and the building block plane as bearing wall is solid, and when using as non-bearing wall body, plane is porous.In porous articles, have the various arrangement modes such as two rounds, three rounds, four rounds, the shape in hole has circular hole and square hole, and the penetration level in hole has communicating pores and half-blind hole.The weight of fragment of brick and building block can be reduced further by perforate.
High-strength magnesite shale pore refractory brick marshalling has higher adhesive property.Illustrate with the shearing resistance experiment of masonry along straight joint cross section, adopt high-strength magnesite shale pore refractory brick size 240mm × 115mm × 90mm, same dish M5 level mortar is adopted when building compression member by laying bricks or stones, mortar seam controls at 8-10mm, and actual the building by laying bricks or stones of member in shear memory is of a size of: 240mm × 290mm × 365mm.Experimental result shows that shear strength of masonry is 0.30-0.65MPa.
Brick strength for bearing wall structure can reach MU10, MU15, MU20, MU25, MU30 level, even higher intensity.
Claims (3)
1. a high strength magnesite shale pore refractory brick, it is characterized in that: make primarily of the following raw material containing mass ratio: in shale powder, add the magnesite powder of mass ratio 10%-20%, the calcium lime powder of mass ratio 3%-12%, the aluminium powder of mass ratio 0.5-1.5 or iron powder, the material for preparing is mixed for benchmark with above-mentioned raw materials, adding temperature is that 40 DEG C-505 DEG C massfraction 50%-60% water fully stir 3-5 minute, and the material that will stir leaves standstill 1h-2h; What stir puts into brick-making mould base body, takes re-baking method, first base is added 700 DEG C of insulations 30 minutes, and heating temperatures keeps obtaining for 8-12 hour to 1100 DEG C by re-baking.
2. the production method of high strength magnesite shale pore refractory brick according to claim 1, is characterized in that: comprise step:
(1) batching step: make primarily of the following raw material containing mass ratio: add the magnesite powder of mass ratio 10%-20%, the calcium lime powder of mass ratio 3%-12%, the aluminium powder of mass ratio 0.5-1.5 or iron powder and carry out mix in shale powder;
(2) base step: with the material prepared for benchmark, adding temperature is that 40 DEG C-505 DEG C massfraction 50%-60% water fully stir 3-5 minute, and the material that will stir leaves standstill 1h-2h; What stir puts into brick-making mould base body;
(3) calcination steps: double roasting technique is taked in roasting, is first incubated 30-50 minute under 700 DEG C of-800 DEG C of conditions, then temperature is increased to 1000 DEG C-1200 DEG C and carries out roasting 8-12 hour; Sintering temperature controls at 1000 DEG C-1200 DEG C and keeps 8-12 hour.
3. the production method of high strength magnesite shale pore refractory brick according to claim 2, it is characterized in that: in described base step, adopting brick one modeling method, the material after the 3-5 minute standing 1-2h that stirs directly is entered mould without the need to drying, and feeding quantity accounting for mould volume 60%-70%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104844251A (en) * | 2015-04-28 | 2015-08-19 | 陈琼燕 | Method for producing bearing porous building block by taking shale as raw material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804017A (en) * | 2013-12-31 | 2014-05-21 | 广西科技大学 | Light shale brick utilizing waste molasses as pore-forming agent and production method |
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2014
- 2014-12-31 CN CN201410846152.3A patent/CN104496534A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804017A (en) * | 2013-12-31 | 2014-05-21 | 广西科技大学 | Light shale brick utilizing waste molasses as pore-forming agent and production method |
Non-Patent Citations (1)
| Title |
|---|
| 许为等: "MgO 对多孔堇青石材料组成结构的影响", 《耐火与石灰》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104844251A (en) * | 2015-04-28 | 2015-08-19 | 陈琼燕 | Method for producing bearing porous building block by taking shale as raw material |
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Application publication date: 20150408 |