CN104072087A - Magnesium oxide board and preparation method thereof - Google Patents
Magnesium oxide board and preparation method thereof Download PDFInfo
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- CN104072087A CN104072087A CN201410243597.2A CN201410243597A CN104072087A CN 104072087 A CN104072087 A CN 104072087A CN 201410243597 A CN201410243597 A CN 201410243597A CN 104072087 A CN104072087 A CN 104072087A
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Abstract
The invention discloses a magnesium oxide board which is prepared by extruding a reinforced material and slurry into a sheet through forming equipment, wherein the reinforced material is composed of a non-woven fabric and a fiberglass mesh or other reinforced materials; the slurry comprises the following components in parts by mass: 100 parts of magnesium oxide with the magnesium content of at least 85% and the activity degree of at least 62%, 80-90 parts of anhydrous magnesium chloride water solution with the concentration of 10-40 baume degrees, 10-15 parts of lightweight filler A, 15-20 parts of lightweight filler B, 1-5 parts of silicon dioxide and 1-10 parts of foaming agent; the particle size of magnesium oxide is 250-400 meshes; preferably, the lightweight filler A is one or more selected from perlite, polyphenyl granules, gangue and vermiculite, and the lightweight filler B is one or more selected from wood flour, straw, rice husk and bamboo fiber; more preferably, the lightweight filler A is hole-closed perlite, and the lightweight filler B is straw sawdust of 80-100 meshes. The invention also discloses a preparation method of the magnesium oxide board. The magnesium oxide board prepared according to the invention is high in strength, not easy to get damp, strong in fire resistance and free of cracks after being fired at high temperature; in addition, the preparation method of the magnesium oxide board disclosed by the invention is short in time.
Description
Technical field
The present invention relates to a kind of building and ornament materials, espespecially a kind of glass magnesium plate and preparation method thereof.
Background technology
Glass magnesium plate is with magnesium oxide, magnesium chloride, water ternary system, be configured and form, taking neutral and alkali glass fiber net as strongthener, the novel uninflammability finishing material being composited for weighting material with light filler (as one or more of carpenter's powder, stalk, rice husk, bamboo fibers, and one or more of perlite, granular polystyrene, coal gangue, vermiculite).Adopt special producing processes to form, have fire prevention, waterproof, tasteless, nontoxic, do not freeze, be stale-proof, do not split, constant, do not fire, the feature such as high-strength light weight, easy construction, long service life.Can directly paint, direct veneer, available air nail, directly go up ceramic tile, there is good tint permanence on surface, high, the resistance to bending flexible of intensity, can follow closely, can saw, can glue, finishing facilitates.Can also with the compound composite insulating board of making of multiple lagging material.
In existing commercially available glass magnesium plate, have magnesian specification of quality on the low sidely, such as 80% Mg content and 50% activity degree, the glass magnesium plate quality making is on the low side.Also having magnesium chloride is all to use magnesium chloride hexahydrate (as Chinese patent CN101871246B), and this kind of magnesium chloride is commonly called as halogen sheet, halogen crystalline substance and halogen powder, contains other a large amount of metallic impurity, and the glass magnesium plate after finished product is caused to very large Moisture Regain.
In the selection of light filler, the perlite of commercially available employing generally uses perforate perlite, and perforate perlite claims again normal expanded perlite, and its granular size is inhomogeneous, and unit weight is lighter, is generally 80kg/m
3.This perforate perlite makes an addition to after the slurry of producing glass magnesium plate, easily a large amount of magnesium chloride solutions that absorb in slurry, the former magnesium chloride that should participate in hydration reaction with magnesium oxide is absorbed in a large number, be hidden in this perforate perlite, " have more than needed " and just produced a part of not participating in hydration reaction in magnesium oxide, thereby cause the poor stability of magnesia oxychloride cement, finished product need to soak out through the long-time soaked chlorion absorbed magnesium chloride, cause the production technique time long, and the chlorion soaking out is also very limited, even there is the phenomenon that cannot soak out.
The main raw material of above-mentioned use, production cost is low, of poor quality, be mainly manifested in the following aspects: the glass magnesium board finished product intensity made is low, easily get damp, resistivity against fire is poor, after high temperature sintering, easily produce crack performance, curing time is long, and finished product need to be through being soaked in water for a long time, to the contained unnecessary chlorion in glass magnesium plate the inside is soaked out, produce thus the longer airing time, had a strong impact on the production cycle in the winter time and under rainwater weather, caused production technique to reach about 15 days.
Summary of the invention
The present invention's object be to provide a kind of intensity high, be difficult for getting damp, resistivity against fire is strong, the glass magnesium plate that do not produce crack performance after high temperature sintering.
Another object of the present invention is to provide the preparation method of short above-mentioned glass magnesium plate of time production cycle.
Object of the present invention can realize by following measures:
A kind of glass magnesium plate, is squeezed into sheet by strongthener and slurry through molding device and forms, and this strongthener is made up of non-woven fabrics and fiberglass gridding cloth or other strongthener, it is characterized in that, this slurry comprises following component by mass parts:
100 parts, magnesium oxide, its Mg content >=85%, activity degree >=62%;
Magnesium Chloride Anhydrous aqueous solution 80-90 part, strength of solution 10-40 degree Beaume;
Light filler A 10-15 part;
Light filler B 15-20 part;
Silica 1-5 part;
Whipping agent 1-10 part;
Wherein, magnesian particle diameter is 250-400 order.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described light filler A is one or more in perlite, granular polystyrene, coal gangue, vermiculite.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described light filler A is perlite.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described light filler A is closed perlite.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described light filler B is one or more in carpenter's powder, stalk, rice husk, bamboo fibers.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described light filler B is stalk.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described light filler B is stalk sawdust 80-100 order.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described whipping agent is magnesite whipping agent.
Preferably, above-mentioned glass magnesium plate, is characterized in that, described whipping agent warp is watered and foams with the volume ratio that water is 1:50.
The preparation method of above-mentioned glass magnesium plate, comprises the steps:
1. prepare slurry: described magnesium oxide and the described Magnesium Chloride Anhydrous aqueous solution are mixed in described ratio and stir into slurry, add light filler B described in one or more in light filler A and carpenter's powder described in one or more in the perlite, granular polystyrene, coal gangue, vermiculite of described ratio, stalk, rice husk, bamboo fibers, stir, add again described silicon-dioxide, described in finally adding, be watered the concurrent foaming agent foam soaking, make slurry;
2. making sheet: the mould of non-woven fabrics, fiberglass gridding cloth or other strongthener successively being put into molding device, slurry is poured in described mould, with non-woven fabrics, fiberglass gridding cloth or the disposable cylinder by molding device of other strongthener and is squeezed into sheet, under the promotion of belt, constantly extrude, after extruding desired size, cut into plate, making sheet completes;
3. mould making sheet being completed is positioned on template drying frame, self produce temperature, through 12 hours hydration reaction drying and mouldings;
4. the demoulding, the air-dry 5-7 days of airing, makes half-finished product plate;
5. cut into desired size, obtain finished product glass magnesium plate.
A kind of glass magnesium plate of the present invention adopts magnesium oxide (its Mg content >=85%, activity degree >=62%) and the Magnesium Chloride Anhydrous aqueous solution, and specification of quality is high, and the finished product glass magnesium plate making is difficult for getting damp.Also adopt one or more light fillers A in perlite, granular polystyrene, coal gangue, vermiculite, preferably perlite, especially preferably closed perlite, closed perlite is also glass bead, and its unit weight is larger, generally at 110 kg/m
3, and it can not absorb the magnesium chloride solution in slurry, makes magnesium chloride solution fully and magnesium oxide generation hydration reaction, the stability of the magnesia oxychloride cement making is strong, intensity is high.Do not need, through long-time soaked process and airing time, greatly to shorten the production cycle simultaneously.
A kind of glass magnesium plate of the present invention also adopts and in slurry, adds silicon-dioxide, in order to increase the mobility of slurry, so that slurry stirs sooner, does not produce " raw material " of caking, thereby reduces churning time and increased work efficiency.
In the slurry of a kind of glass magnesium plate of the present invention, also add the whipping agent after the foaming of Against water, preferably magnesite whipping agent, as weighting agent, with air compressor, described magnesite whipping agent is produced to the foam of a large amount of good stabilities through high-pressure air, thereby increase slurry volume, in the situation that not reducing product strength and fire performance, reduce product proportion, make glass magnesium plate meeting " breathing ", reduce airing air-dry time, further shorten production technique.
The present invention's beneficial effect is:
The intensity of a kind of glass magnesium plate of the present invention is high, be difficult for getting damp, resistivity against fire is strong, after high temperature sintering, do not produce crack performance, and the preparation production technique time of the present invention's glass magnesium plate is short.
Embodiment
It is following that the present invention will be further described in conjunction with the embodiments.
Embodiment 1
The slurry of glass magnesium plate comprises following component by weight:
100 parts, magnesium oxide, its Mg content >=85%, activity degree >=62%, particle diameter is 250 orders;
90 parts of the Magnesium Chloride Anhydrous aqueous solution, 23.5 degree degree Beaume;
15 parts of perlites, closed pore;
20 parts of straws, sawdust 80 orders;
2 parts of silicon-dioxide;
2 parts of magnesite whipping agents, the foaming of 100ml Against 5000ml water.
1. prepare slurry: described magnesium oxide and the described Magnesium Chloride Anhydrous aqueous solution are mixed in described ratio and stir into slurry, add perlite and the straw of described ratio, stir, add again described silicon-dioxide, described in finally adding, be watered the concurrent foaming agent foam soaking, make slurry;
2. making sheet: the mould of non-woven fabrics, fiberglass gridding cloth or other strongthener successively being put into molding device, slurry is poured in described mould, with non-woven fabrics, fiberglass gridding cloth or the disposable cylinder by molding device of other strongthener and is squeezed into sheet, under the promotion of belt, constantly extrude, after extruding desired size, cut into plate, making sheet completes;
3. mould making sheet being completed is positioned on template drying frame, self produce temperature, through 12 hours hydration reaction drying and mouldings;
4. the demoulding, the air-dry 5-7 days of airing, makes half-finished product plate;
5. cut into 2440*1220*9mm size, obtain finished product glass magnesium plate.
The finished product making is delivered to national building materials test center and detect, result is as follows:
Apparent density: 1.15t/m
3;
Folding strength: 21.6Mpa, is better than JC688-2006 minimum standard value 16Mpa(9mm);
Resistance to impact shock: 10.4KJ/m
2, be better than JC688-2006 minimum standard and be worth 5.5 KJ/m
2(9mm);
Surface halide accumulation resistance: without the globule, without getting damp, meet JC688-2006 standard-required;
Water ratio dispatches from the factory: 3%, be better than JC688-2006 highest standard value 8%;
Contract with dry rate: 0.1%, be better than JC688-2006 highest standard value 0.3%;
Bulking factor: 0.1%, be better than JC688-2006 highest standard value 0.6%;
Hold screw power: 52N/m, be better than JC688-2006 minimum standard value 20N/m;
Chloride ion content: 7%, be better than JC688-2006 highest standard value 10%;
Burning behavior class: meet A1 level requirement in GB8624-1997.
Embodiment 2
The slurry of glass magnesium plate comprises following component by weight:
100 parts, magnesium oxide, its Mg content >=85%, activity degree >=62%, particle diameter is 250 orders;
85 parts of the Magnesium Chloride Anhydrous aqueous solution, 23.5 degree degree Beaume;
12 parts of perlites, closed pore;
18 parts of straws, sawdust 80 orders;
2 parts of silicon-dioxide;
2 parts of magnesite whipping agents, the foaming of 100ml Against 5000ml water.
1. prepare slurry: described magnesium oxide and the described Magnesium Chloride Anhydrous aqueous solution are mixed in described ratio and stir into slurry, add perlite and the straw of described ratio, stir, add again described silicon-dioxide, described in finally adding, be watered the concurrent foaming agent foam soaking, make slurry;
2. making sheet: the mould of non-woven fabrics, fiberglass gridding cloth or other strongthener successively being put into molding device, slurry is poured in described mould, with non-woven fabrics, fiberglass gridding cloth or the disposable cylinder by molding device of other strongthener and is squeezed into sheet, under the promotion of belt, constantly extrude, after extruding desired size, cut into plate, making sheet completes;
3. mould making sheet being completed is positioned on template drying frame, self produce temperature, through 12 hours hydration reaction drying and mouldings;
4. the demoulding, the air-dry 5-7 days of airing, makes half-finished product plate;
5. cut into 2440*1220*9mm size, obtain finished product glass magnesium plate.
The finished product making is delivered to national building materials test center and detect, result is as follows:
Apparent density: 1.08t/m
3;
Folding strength: 19.8Mpa, is better than JC688-2006 minimum standard value 16Mpa(9mm);
Resistance to impact shock: 9.7KJ/m
2, be better than JC688-2006 minimum standard and be worth 5.5 KJ/m
2(9mm);
Surface halide accumulation resistance: without the globule, without getting damp, meet JC688-2006 standard-required;
Water ratio dispatches from the factory: 4%, be better than JC688-2006 highest standard value 8%;
Contract with dry rate: 0.1%, be better than JC688-2006 highest standard value 0.3%;
Bulking factor: 0.1%, be better than JC688-2006 highest standard value 0.6%;
Hold screw power: 49N/m, be better than JC688-2006 minimum standard value 20N/m;
Chloride ion content: 6%, be better than JC688-2006 highest standard value 10%;
Burning behavior class: meet A1 level requirement in GB8624-1997.
Embodiment 3
The slurry of glass magnesium plate comprises following component by weight:
100 parts, magnesium oxide, its Mg content >=85%, activity degree >=62%, particle diameter is 250 orders;
80 parts of the Magnesium Chloride Anhydrous aqueous solution, 23.5 degree degree Beaume;
10 parts of perlites, closed pore;
15 parts of straws, sawdust 80 orders;
2 parts of silicon-dioxide;
2 parts of magnesite whipping agents, the foaming of 100ml Against 5000ml water.
1. prepare slurry: described magnesium oxide and the described Magnesium Chloride Anhydrous aqueous solution are mixed in described ratio and stir into slurry, add perlite and the straw of described ratio, stir, add again described silicon-dioxide, described in finally adding, be watered the concurrent foaming agent foam soaking, make slurry;
2. making sheet: the mould of non-woven fabrics, fiberglass gridding cloth or other strongthener successively being put into molding device, slurry is poured in described mould, with non-woven fabrics, fiberglass gridding cloth or the disposable cylinder by molding device of other strongthener and is squeezed into sheet, under the promotion of belt, constantly extrude, after extruding desired size, cut into plate, making sheet completes;
3. mould making sheet being completed is positioned on template drying frame, self produce temperature, through 12 hours hydration reaction drying and mouldings;
4. the demoulding, the air-dry 5-7 days of airing, makes half-finished product plate;
5. cut into 2440*1220*9mm size, obtain finished product glass magnesium plate.
The finished product making is delivered to national building materials test center and detect, result is as follows:
Apparent density: 1.02t/m
3;
Folding strength: 18.4Mpa, is better than JC688-2006 minimum standard value 16Mpa(9mm);
Resistance to impact shock: 9.2KJ/m
2, be better than JC688-2006 minimum standard and be worth 5.5 KJ/m
2(9mm);
Surface halide accumulation resistance: without the globule, without getting damp, meet JC688-2006 standard-required;
Water ratio dispatches from the factory: 4%, be better than JC688-2006 highest standard value 8%;
Contract with dry rate: 0.1%, be better than JC688-2006 highest standard value 0.3%;
Bulking factor: 0.1%, be better than JC688-2006 highest standard value 0.6%;
Hold screw power: 50N/m, be better than JC688-2006 minimum standard value 20N/m;
Chloride ion content: 6%, be better than JC688-2006 highest standard value 10%;
Burning behavior class: meet A1 level requirement in GB8624-1997.
Above-described embodiment, only for the present invention will be described, does not form the restriction to claim scope, and other alternative means that it may occur to persons skilled in the art that, all within the scope of the claims in the present invention.
Claims (10)
1. a glass magnesium plate, is squeezed into sheet by strongthener and slurry through molding device and forms, and this strongthener is made up of non-woven fabrics and fiberglass gridding cloth or other strongthener, it is characterized in that, this slurry comprises following component by mass parts:
100 parts, magnesium oxide, its Mg content >=85%, activity degree >=62%;
Magnesium Chloride Anhydrous aqueous solution 80-90 part, strength of solution 10-40 degree Beaume;
Light filler A 10-15 part;
Light filler B 15-20 part;
Silica 1-5 part;
Whipping agent 1-10 part;
Wherein, magnesian particle diameter is 250-400 order.
2. a kind of glass magnesium plate according to claim 1, is characterized in that, described light filler A is one or more in perlite, granular polystyrene, coal gangue, vermiculite.
3. a kind of glass magnesium plate according to claim 2, is characterized in that, described light filler A is perlite.
4. a kind of glass magnesium plate according to claim 3, is characterized in that, described light filler A is closed perlite.
5. a kind of glass magnesium plate according to claim 1, is characterized in that, described light filler B is one or more in carpenter's powder, stalk, rice husk, bamboo fibers.
6. a kind of glass magnesium plate according to claim 5, is characterized in that, described light filler B is stalk.
7. a kind of glass magnesium plate according to claim 6, is characterized in that, described light filler B is stalk sawdust 80-100 order.
8. a kind of glass magnesium plate according to claim 1, is characterized in that, described whipping agent is magnesite whipping agent.
9. a kind of glass magnesium plate according to claim 1, is characterized in that, described whipping agent warp is watered and foams with the volume ratio that water is 1:50.
10. a preparation method for glass magnesium plate claimed in claim 1, is characterized in that, comprises the steps:
1. prepare slurry: described magnesium oxide and the described Magnesium Chloride Anhydrous aqueous solution are mixed in described ratio and stir into slurry, add light filler B described in one or more in light filler A and carpenter's powder described in one or more in the perlite, granular polystyrene, coal gangue, vermiculite of described ratio, stalk, rice husk, bamboo fibers, stir, add again described silicon-dioxide, described in finally adding, be watered the concurrent foaming agent foam soaking, make slurry;
2. making sheet: the mould of non-woven fabrics, fiberglass gridding cloth or other strongthener successively being put into molding device, slurry is poured in described mould, with non-woven fabrics, fiberglass gridding cloth or the disposable cylinder by molding device of other strongthener and is squeezed into sheet, under the promotion of belt, constantly extrude, after extruding desired size, cut into plate, making sheet completes;
3. mould making sheet being completed is positioned on template drying frame, self produce temperature, through 12 hours hydration reaction drying and mouldings;
4. the demoulding, the air-dry 5-7 days of airing, makes half-finished product plate;
5. cut into desired size, obtain finished product glass magnesium plate.
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|---|---|---|---|
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|---|---|---|---|
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| CN104692765A (en) * | 2015-02-27 | 2015-06-10 | 李金才 | Light environment-friendly glass magnesium board and preparation method thereof |
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Application publication date: 20141001 |