CN108147774A - A kind of magnesite material and preparation method thereof - Google Patents
A kind of magnesite material and preparation method thereof Download PDFInfo
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- CN108147774A CN108147774A CN201711316966.6A CN201711316966A CN108147774A CN 108147774 A CN108147774 A CN 108147774A CN 201711316966 A CN201711316966 A CN 201711316966A CN 108147774 A CN108147774 A CN 108147774A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of magnesite materials and preparation method thereof, belong to waterproof material technical field.Walnut shell ball mill grinding, sieving are obtained walnut shell powder by the present invention；Walnut shell powder nitrogen charging is kept the temperature and is carbonized, cooling must carbonize walnut shell powder；Charing walnut shell powder with saturated calcium hydroxide solution is stirred, obtains mixed slurry；Carbon dioxide is passed through into mixed slurry, is filtered, it is dry, charing walnut shell powder must be pre-processed；Pretreatment charing walnut shell powder is fumigated with the nitrogen containing trimethyl aluminium to get modified charing walnut shell powder end；By light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut shell powder is last, and silane coupling agent ultrasonic disperse obtains dispersed paste；By gained dispersed paste, ammonium nitrate, cupric sulfate pentahydrate and emulsifier for mixing mixing are to get magnesite material.Magnesite material provided by the invention has excellent water resistance and mechanical property, effectively avoid the problem that system damp suction surface halide accumulation and scum go out it is white.
Description
Technical field
The invention discloses a kind of magnesite materials and preparation method thereof, belong to waterproof material technical field.
Background technology
Magnesite product be using magnesia as cementitious material, using magnesium chloride as blender, the nothing of additional various filler materials
Machine chemical products, its outstanding advantages are：1. 70~140MPa of superhigh intensity is 2~3 times of portland cement；2. high fire resisting.
2270 DEG C of fusing point；3. high abrasion.Abrasion resistance is 1~2 times of cement；It is 4. fast solidifying.Product 6~demould for 24 hours；5. lightweight；6. high glaze
Degree.Coordinate appropriate technique, can make>More than 90 gloss units imitative porcelain, imitative coloured glaze product；7. bulk density compares normal silicate
Cement low 1/4.So it is particularly suitable for, production is high-strength, and height is prevented fires, high abrasion, high glaze, it is desirable that solidifying light building material and dress soon
Exterior material, but its have return the fatal drawbacks such as halogen, scum, deformation, water-resistance difference.Magnesite material generate drawback basic reason be
The pore structure that magnesite material generates in forming process, if outside moisture by hole enters magnesite material hardenite, go directly water
Change inside phase, dissolve out the chlorion in hyrate, aquation is caused mutually to disintegrate, product strength is caused to decline, finally lose completely strong
Degree, this is the main reason for leading to magnesite product poor water resistance；In addition halogen and frost are glowed outward by pore and macropore, are formed
Return halogen and scum；Also hole causes the inhomogeneities of moisture evaporation, leads to buckling deformation and crackle.So in magnesite product
Pore structure is to cause the main cause of magnesite material disadvantage, and the disadvantage of most of magnesite materials is all caused by water and hole, therefore, to be reached
Better modified effect, should improve the pore structure of magnesite material, improve its water-resistance again.In recent years, magnesite material should
With more and more extensive, but because of its critical defect, the not high product of life requirement is often only used for, it is durable to extend its
Property, it is necessary to various modifying agent are added to improve its performance.
Modified additive improves water resistance and mechanical property and resists and return to the structural stability of raising magnesite material
Halogen, scum, deformation, rush is coagulated, slow setting, increase operation workability have extremely important effect.Modified additive is mostly by inorganic
Object, organic matter, siliceous industrial solid castoff, the compositions such as metal and metal oxide, usually according to them in magnesite material
Function, the safety that uses and the pollution of environment and the source of material and economy are carried out selecting use.
Therefore, how to improve traditional magnesite material poor water resistance, the shortcomings that easy scum, mechanical property is bad, to obtain more
The magnesite material of high combination property is that it is promoted with applied to broader field, it is urgently to be resolved hurrily to meet industrial production demand
Problem.
Invention content
The present invention solves the technical problem of：For traditional magnesite material poor water resistance, easy scum, mechanical property is not
The problem of good, provides a kind of magnesite material and preparation method thereof.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of magnesite material is made of the raw material of following parts by weight：30~40 parts of light-magnesite powders, 30~40 part of six water
Close magnesium chloride, 6~8 parts of ammonium nitrate, 20~30 parts of fillers, 20~30 parts of water, 20~30 parts of sodium alginate solutions, 10~20 parts of modifications
Carbonize walnut shell powder, 8~10 parts of cupric sulfate pentahydrates, 5~6 parts of emulsifiers, 5~6 parts of silane coupling agents；
The preparation process of the magnesite material is：
（1）Each raw material is weighed by raw material composition；
（2）By light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut shell powder end, silane
Coupling agent ultrasonic disperse, obtains dispersed paste；
（3）By above-mentioned gained dispersed paste, ammonium nitrate, cupric sulfate pentahydrate and emulsifier for mixing mixing are to get magnesite material.
A kind of magnesite material according to claim 1, the filler be silicon ash, flyash, SILICA FUME in mass ratio 1：
1：1 compounding ball milling is prepared.
According to claim 1, a kind of magnesite material, the preparation process of the sodium alginate solution are：By sodium alginate with
Water in mass ratio 1：50~1：After 100 mixing swellings, heating stirring is dissolved to get sodium alginate solution.
According to claim 1, a kind of magnesite material, the modifying process at the modified charing walnut shell powder end are：By core
Peach shell ball mill grinding, sieving, obtains walnut shell powder；Walnut shell powder nitrogen charging is kept the temperature and is carbonized, cooling obtains charing walnut shell powder
End；It will charing walnut shell powder and saturated calcium hydroxide solution in mass ratio 1：10~1：30 are stirred, and obtain mixed slurry；To
Carbon dioxide is passed through in mixed slurry, is filtered, it is dry to moisture content 8~10%, charing walnut shell powder must be pre-processed；It will locate in advance
Reason charing walnut shell powder is fumigated with the nitrogen containing trimethyl aluminium to get modified charing walnut shell powder end；The saturation hydroxide
Calcium solution is the saturated calcium hydroxide solution under the conditions of 20~22 DEG C.
According to claim 1, a kind of magnesite material, the emulsifier are Tween-60, in Tween-80 or Si Pan -80
Any one.
According to claim 1, a kind of magnesite material, the silane coupling agent are silane resin acceptor kh-550, and silane is even
Join any one in agent KH-560 or Silane coupling reagent KH-570.
The beneficial effects of the invention are as follows：
（1）The present invention during the hydration reaction of magnesia and magnesium chloride, releases a large amount of heat by adding ammonium nitrate,
Soluble in water absorb of ammonium nitrate releases a large amount of heat, and react, and generates ammonia and nitric acid, on the one hand, ammonium nitrate is dissolved in
It is absorbed in water and releases a large amount of heat, avoid magnesite product because raw material quality control is not tight, science, technique is not unreasonable for proportioning
When, system heat release concentration of local is caused, the unbalanced problem of thermal stress, effective each position shrinking percentage of control system is consistent, effectively
Avoid the problem that magnesite product buckling deformation is serious, on the other hand, the ammonia of generation plays the role of foaming, is formed by foaming
The hardenite of microcellular structure, after expansion occurs, stress will be released by the space that micropore is formed, i.e., microporous space is inhaled
Received swelling stress, in the case where swelling stress occurs, it can by swelling stress by the way that the effect of agent is received to be absorbed,
Effectively avoid deformation and the crackle of product；
（2）The present invention is modified during the hydration reaction of magnesia and magnesium chloride by adding modified charing walnut shell powder end
Aquation can be participated in respectively by carbonizing the calcium hydroxide of walnut shell powder adsorption and aluminium hydroxide, formed three-dimensional network and interted crosslinking, increase
The crosslink density of strong system, on the one hand, enhance the mechanical property of system, on the other hand, reduce system bleeding, in reduction system
The effect of pore channel, meanwhile, the three-dimensional network being largely distributed in system can generate capillary very big extruding force, make hair
Tubule is refined or is eliminated, and enhances the water resistance of system, effectively avoid the problem that system damp suction surface halide accumulation and scum go out it is white；
（3）By adding cupric sulfate pentahydrate, cupric sulfate pentahydrate first is dissolved in water and absorbs releasing a large amount of heat the present invention, avoids water chestnut
Magnesium product matches not science, when technique is unreasonable, causes system heat release concentration of local, thermal stress because raw material quality control is not tight
Unbalanced problem, effective each position shrinking percentage of control system is consistent, effectively avoids the problem that magnesite product buckling deformation is serious,
Secondly, during the hydration reaction of magnesia and magnesium chloride, since copper ion is there are unoccupied orbital, copper sulphate is first reacted with ammonium hydroxide
Cupric ammine complex is generated, then, generation cupric ammine complex forms copper chloro-complex with the chloride binding containing lone pair electrons, will
The chlorion to dissociate in system is fixed, and is avoided the loss of magnesium chloride, is promoted the mechanical property of system.
Specific embodiment
By sodium alginate and water in mass ratio 1：50~1：100 add in beaker, and 20~30min is stirred with glass bar
Afterwards, 3~4h of swelling is stood, then beaker immigration digital display is tested the speed constant temperature blender with magnetic force, is 95~100 DEG C in temperature, rotating speed is
Under the conditions of 400~500r/min, heating stirring dissolves 40~50min to get sodium alginate solution；Walnut shell is placed in ball mill
In, ball mill grinding, and the sieve of 60~80 mesh is crossed, obtain walnut shell powder；Walnut shell powder is placed in retort, and with 50~
60mL/min is filled with nitrogen into stove, under the conditions of temperature is 550~650 DEG C, under nitrogen protective condition, heat preservation charing 1~
After 2h, room temperature is down to stove, walnut shell powder must be carbonized；Walnut shell powder and saturated calcium hydroxide solution will be carbonized in mass ratio
1：10~1：30 are placed in three-necked flask, in rotating speed under the conditions of 200~300r/min, to be stirred 20~30min, must mix
Slurry；40~60min of carbon dioxide is continually fed into mixed slurry, obtains mixed liquor, then after mixed liquor is filtered, it is dry to containing
Water rate 8~10% must pre-process charing walnut shell powder；Pretreatment charing walnut shell powder is placed in fluidized-bed reactor, and
The nitrogen containing trimethyl aluminium is filled with into fluidized-bed reactor with 50~60mL/min, 40~60min is fumigated and is carbonized to get modified
Walnut shell powder；It counts in parts by weight, takes 30~40 parts of light-magnesite powders successively, 30~40 parts of Magnesium dichloride hexahydrates, 6~8
Part ammonium nitrate, 20~30 parts of fillers, 20~30 parts of water, 20~30 parts of sodium alginate solutions, 10~20 parts of modified charing walnut shell powders
End, 8~10 parts of cupric sulfate pentahydrates, 5~6 parts of emulsifiers, 5~6 parts of silane coupling agents, by light-magnesite powder, six chloride hydrates
Magnesium, filler, water, sodium alginate solution, modified charing walnut shell powder end, silane coupling agent is placed in ultrasonic disperse instrument, in supersonic frequency
Under the conditions of rate is 55~65kHz, 40~60min of ultrasonic disperse obtains dispersed paste；Gained dispersed paste is all gone into batch mixer
In, then to ammonium nitrate, cupric sulfate pentahydrate and emulsifier is added in batch mixer, in rotating speed under the conditions of 200~300r/min, to stir
30~40min of mixing is mixed to get magnesite material.The filler be silicon ash, flyash, SILICA FUME in mass ratio 1：1：1 compounding ball
Mill is prepared.The saturated calcium hydroxide solution is the saturated calcium hydroxide solution under the conditions of 20~22 DEG C.The emulsifier
Any one for Tween-60, in Tween-80 or Si Pan -80.The silane coupling agent be silane resin acceptor kh-550, silane
Any one in coupling agent KH-560 or Silane coupling reagent KH-570.
Example 1
By sodium alginate and water in mass ratio 1：100 add in beaker, after being stirred 30min with glass bar, stand swelling 4h,
Beaker immigration digital display is tested the speed constant temperature blender with magnetic force again, is 100 DEG C in temperature, under the conditions of rotating speed is 500r/min, heating is stirred
Dissolving 50min is mixed to get sodium alginate solution；Walnut shell is placed in ball mill, ball mill grinding, and crosses the sieve of 80 mesh, obtain walnut
Shell powder；Walnut shell powder is placed in retort, and nitrogen is filled with into stove with 60mL/min, in temperature be 650 DEG C of conditions
Under, under nitrogen protective condition, after heat preservation charing 2h, room temperature is down to stove, walnut shell powder must be carbonized；Walnut shell powder will be carbonized
End and saturated calcium hydroxide solution in mass ratio 1：30 are placed in three-necked flask, in rotating speed under the conditions of 300r/min, stirring is mixed
30min is closed, obtains mixed slurry；Carbon dioxide 60min is continually fed into mixed slurry, obtains mixed liquor, then mixed liquor is filtered
Afterwards, it dries to moisture content 10%, charing walnut shell powder must be pre-processed；It is anti-that pretreatment charing walnut shell powder is placed in fluid bed
It answers in device, and is filled with the nitrogen containing trimethyl aluminium into fluidized-bed reactor with 60mL/min, fumigate 60min to get Modified Activated Carbon
Change walnut shell powder；It counts in parts by weight, takes 40 parts of light-magnesite powders successively, 40 parts of Magnesium dichloride hexahydrates, 8 parts of ammonium nitrate,
30 parts of fillers, 30 parts of water, 30 parts of sodium alginate solutions, 20 parts of modified charing walnut shell powder ends, 10 parts of cupric sulfate pentahydrates, 6 parts of emulsifications
Agent, 6 parts of silane coupling agents, by light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut
Shell powder, silane coupling agent are placed in ultrasonic disperse instrument, under the conditions of supersonic frequency is 65kHz, ultrasonic disperse 60min, and score
Dissipate slurry；Gained dispersed paste is all gone in batch mixer, then to adding in ammonium nitrate, cupric sulfate pentahydrate and breast in batch mixer
Agent, in rotating speed under the conditions of 300r/min, to be stirred 40min to get magnesite material.The filler be silicon ash, flyash,
SILICA FUME in mass ratio 1：1：1 compounding ball milling is prepared.The saturated calcium hydroxide solution is the saturation hydrogen under the conditions of 22 DEG C
Calcium oxide solution.The emulsifier is Tween-60.The silane coupling agent is silane resin acceptor kh-550.
Example 2
By sodium alginate and water in mass ratio 1：100 add in beaker, after being stirred 30min with glass bar, stand swelling 4h,
Beaker immigration digital display is tested the speed constant temperature blender with magnetic force again, is 100 DEG C in temperature, under the conditions of rotating speed is 500r/min, heating is stirred
Dissolving 50min is mixed to get sodium alginate solution；Walnut shell is placed in ball mill, ball mill grinding, and crosses the sieve of 80 mesh, obtain walnut
Shell powder；Walnut shell powder is placed in retort, and nitrogen is filled with into stove with 60mL/min, in temperature be 650 DEG C of conditions
Under, under nitrogen protective condition, after heat preservation charing 2h, room temperature is down to stove, walnut shell powder must be carbonized；Walnut shell powder will be carbonized
End and saturated calcium hydroxide solution in mass ratio 1：30 are placed in three-necked flask, in rotating speed under the conditions of 300r/min, stirring is mixed
30min is closed, obtains mixed slurry；Carbon dioxide 60min is continually fed into mixed slurry, obtains mixed liquor, then mixed liquor is filtered
Afterwards, it dries to moisture content 10%, charing walnut shell powder must be pre-processed；It is anti-that pretreatment charing walnut shell powder is placed in fluid bed
It answers in device, and is filled with the nitrogen containing trimethyl aluminium into fluidized-bed reactor with 60mL/min, fumigate 60min to get Modified Activated Carbon
Change walnut shell powder；It counts in parts by weight, takes 40 parts of light-magnesite powders successively, 40 parts of Magnesium dichloride hexahydrates, 8 parts of ammonium nitrate,
30 parts of fillers, 30 parts of water, 30 parts of sodium alginate solutions, 20 parts of modified charing walnut shell powder ends, 10 parts of cupric sulfate pentahydrates, 6 parts of emulsifications
Agent, 6 parts of silane coupling agents, by light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut
Shell powder, silane coupling agent are placed in ultrasonic disperse instrument, under the conditions of supersonic frequency is 65kHz, ultrasonic disperse 60min, and score
Dissipate slurry；Gained dispersed paste is all gone in batch mixer, then to adding in ammonium nitrate, cupric sulfate pentahydrate and breast in batch mixer
Agent, in rotating speed under the conditions of 300r/min, to be stirred 40min to get magnesite material.The filler be silicon ash, flyash,
SILICA FUME in mass ratio 1：1：1 compounding ball milling is prepared.The saturated calcium hydroxide solution is the saturation hydrogen under the conditions of 22 DEG C
Calcium oxide solution.The emulsifier is Tween-60.The silane coupling agent is silane resin acceptor kh-550.
Example 3
By sodium alginate and water in mass ratio 1：100 add in beaker, after being stirred 30min with glass bar, stand swelling 4h,
Beaker immigration digital display is tested the speed constant temperature blender with magnetic force again, is 100 DEG C in temperature, under the conditions of rotating speed is 500r/min, heating is stirred
Dissolving 50min is mixed to get sodium alginate solution；Walnut shell is placed in ball mill, ball mill grinding, and crosses the sieve of 80 mesh, obtain walnut
Shell powder；Walnut shell powder is placed in retort, and nitrogen is filled with into stove with 60mL/min, in temperature be 650 DEG C of conditions
Under, under nitrogen protective condition, after heat preservation charing 2h, room temperature is down to stove, walnut shell powder must be carbonized；Walnut shell powder will be carbonized
End and saturated calcium hydroxide solution in mass ratio 1：30 are placed in three-necked flask, in rotating speed under the conditions of 300r/min, stirring is mixed
30min is closed, obtains mixed slurry；Carbon dioxide 60min is continually fed into mixed slurry, obtains mixed liquor, then mixed liquor is filtered
Afterwards, it dries to moisture content 10%, charing walnut shell powder must be pre-processed；It is anti-that pretreatment charing walnut shell powder is placed in fluid bed
It answers in device, and is filled with the nitrogen containing trimethyl aluminium into fluidized-bed reactor with 60mL/min, fumigate 60min to get Modified Activated Carbon
Change walnut shell powder；It counts in parts by weight, takes 40 parts of light-magnesite powders successively, 40 parts of Magnesium dichloride hexahydrates, 8 parts of ammonium nitrate,
30 parts of fillers, 30 parts of water, 30 parts of sodium alginate solutions, 20 parts of modified charing walnut shell powder ends, 10 parts of cupric sulfate pentahydrates, 6 parts of emulsifications
Agent, 6 parts of silane coupling agents, by light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut
Shell powder, silane coupling agent are placed in ultrasonic disperse instrument, under the conditions of supersonic frequency is 65kHz, ultrasonic disperse 60min, and score
Dissipate slurry；Gained dispersed paste is all gone in batch mixer, then to adding in ammonium nitrate, cupric sulfate pentahydrate and breast in batch mixer
Agent, in rotating speed under the conditions of 300r/min, to be stirred 40min to get magnesite material.The filler be silicon ash, flyash,
SILICA FUME in mass ratio 1：1：1 compounding ball milling is prepared.The saturated calcium hydroxide solution is the saturation hydrogen under the conditions of 22 DEG C
Calcium oxide solution.The emulsifier is Tween-60.The silane coupling agent is silane resin acceptor kh-550.
Example 4
By sodium alginate and water in mass ratio 1：100 add in beaker, after being stirred 30min with glass bar, stand swelling 4h,
Beaker immigration digital display is tested the speed constant temperature blender with magnetic force again, is 100 DEG C in temperature, under the conditions of rotating speed is 500r/min, heating is stirred
Dissolving 50min is mixed to get sodium alginate solution；Walnut shell is placed in ball mill, ball mill grinding, and crosses the sieve of 80 mesh, obtain walnut
Shell powder；Walnut shell powder is placed in retort, and nitrogen is filled with into stove with 60mL/min, in temperature be 650 DEG C of conditions
Under, under nitrogen protective condition, after heat preservation charing 2h, room temperature is down to stove, walnut shell powder must be carbonized；Walnut shell powder will be carbonized
End and saturated calcium hydroxide solution in mass ratio 1：30 are placed in three-necked flask, in rotating speed under the conditions of 300r/min, stirring is mixed
30min is closed, obtains mixed slurry；Carbon dioxide 60min is continually fed into mixed slurry, obtains mixed liquor, then mixed liquor is filtered
Afterwards, it dries to moisture content 10%, charing walnut shell powder must be pre-processed；It is anti-that pretreatment charing walnut shell powder is placed in fluid bed
It answers in device, and is filled with the nitrogen containing trimethyl aluminium into fluidized-bed reactor with 60mL/min, fumigate 60min to get Modified Activated Carbon
Change walnut shell powder；It counts in parts by weight, takes 40 parts of light-magnesite powders successively, 40 parts of Magnesium dichloride hexahydrates, 8 parts of ammonium nitrate,
30 parts of fillers, 30 parts of water, 30 parts of sodium alginate solutions, 20 parts of modified charing walnut shell powder ends, 10 parts of cupric sulfate pentahydrates, 6 parts of emulsifications
Agent, 6 parts of silane coupling agents, by light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut
Shell powder, silane coupling agent are placed in ultrasonic disperse instrument, under the conditions of supersonic frequency is 65kHz, ultrasonic disperse 60min, and score
Dissipate slurry；Gained dispersed paste is all gone in batch mixer, then to adding in ammonium nitrate, cupric sulfate pentahydrate and breast in batch mixer
Agent, in rotating speed under the conditions of 300r/min, to be stirred 40min to get magnesite material.The filler be silicon ash, flyash,
SILICA FUME in mass ratio 1：1：1 compounding ball milling is prepared.The saturated calcium hydroxide solution is the saturation hydrogen under the conditions of 22 DEG C
Calcium oxide solution.The emulsifier is Tween-60.The silane coupling agent is silane resin acceptor kh-550.
Comparative example：The magnesite composite of Suqian material Science and Technology Ltd. production.
The magnesite material of 1 to 4 gained of example and comparative example product are subjected to performance detection, specific detection method is as follows：
1. mechanical property and water resistance：After every group of two parts of maintenance to 28d ages of test specimen, part test compression strength R0；
After another part impregnates 28d in water, compression strength R after surface measurement is impregnated is dried, and test coefficient of softing, water-fast softening system
Number is according to formula（1）It is calculated, its value of coefficient of softing is bigger to represent that intensity is higher after soaking, and water resistance is better, on the contrary then poorer；
K=R/R0（1）
In formula：K is water-fast coefficient of softing；R0The compression strength of sample, MPa during for 28d；R is the pressure resistance of sample after immersion 28d
Degree, MPa；
2. scum detects：It is detected according to JC568, observes material appearance after 72h.
Specific testing result is as shown in table 1：
Table 1
By 1 testing result of table it is found that magnesite material water resistance and mechanical property prepared by technical solution of the present invention significantly improve, and
And it without scum phenomenon, has broad prospects in the development of waterproof material industry.
Claims (6)
1. a kind of magnesite material, it is characterised in that：It is made of the raw material of following parts by weight：30~40 parts of light calcined magnesias
Powder, 30~40 parts of Magnesium dichloride hexahydrates, 6~8 parts of ammonium nitrate, 20~30 parts of fillers, 20~30 parts of water, 20~30 parts of sodium alginates
Liquid, 10~20 parts of modified charing walnut shell powder ends, 8~10 parts of cupric sulfate pentahydrates, 5~6 parts of emulsifiers, 5~6 parts silane coupled
Agent；
The preparation process of the magnesite material is：
（1）Each raw material is weighed by raw material composition；
（2）By light-magnesite powder, Magnesium dichloride hexahydrate, filler, water, sodium alginate solution, modified charing walnut shell powder end, silane
Coupling agent ultrasonic disperse, obtains dispersed paste；
（3）By above-mentioned gained dispersed paste, ammonium nitrate, cupric sulfate pentahydrate and emulsifier for mixing mixing are to get magnesite material.
2. a kind of magnesite material according to claim 1, it is characterised in that：The filler is silicon ash, and flyash, SILICA FUME presses
Mass ratio 1：1：1 compounding ball milling is prepared.
3. a kind of magnesite material according to claim 1, it is characterised in that：The preparation process of the sodium alginate solution is：It will
Sodium alginate and water in mass ratio 1：50~1：After 100 mixing swellings, heating stirring is dissolved to get sodium alginate solution.
4. a kind of magnesite material according to claim 1, it is characterised in that：The modified charing walnut shell powder end was modified
Cheng Wei：By walnut shell ball mill grinding, sieving obtains walnut shell powder；Walnut shell powder nitrogen charging is kept the temperature and is carbonized, cooling must carbonize
Walnut shell powder；It will charing walnut shell powder and saturated calcium hydroxide solution in mass ratio 1：10~1：30 are stirred, and obtain mixed
Close slurry；Carbon dioxide is passed through into mixed slurry, is filtered, it is dry to moisture content 8~10%, charing walnut shell powder must be pre-processed
End；Pretreatment charing walnut shell powder is fumigated with the nitrogen containing trimethyl aluminium to get modified charing walnut shell powder end；It is described full
Saturated calcium hydroxide solution under the conditions of being 20~22 DEG C with calcium hydroxide solution.
5. a kind of magnesite material according to claim 1, it is characterised in that：The emulsifier be Tween-60, Tween-80 or
Any one in Si Pan -80.
6. a kind of magnesite material according to claim 1, it is characterised in that：The silane coupling agent is silane coupling agent KH-
Any one in 550, silane coupling agent KH-560 or Silane coupling reagent KH-570.
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| CN201711316966.6A CN108147774A (en) | 2017-12-12 | 2017-12-12 | A kind of magnesite material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020566A (en) * | 2018-08-02 | 2018-12-18 | 佛山陵朝新材料有限公司 | A kind of preparation method of the dedicated foamed ceramics of aluminium melting liquid filtrate |
| CN114369424A (en) * | 2022-01-27 | 2022-04-19 | 佛山市宝昌珑消防科技有限责任公司 | Fireproof and corrosion-resistant material and preparation method thereof, and fireproof glue and preparation method thereof |
-
2017
- 2017-12-12 CN CN201711316966.6A patent/CN108147774A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020566A (en) * | 2018-08-02 | 2018-12-18 | 佛山陵朝新材料有限公司 | A kind of preparation method of the dedicated foamed ceramics of aluminium melting liquid filtrate |
| CN109020566B (en) * | 2018-08-02 | 2021-09-21 | 佛山陵朝新材料有限公司 | Preparation method of special foamed ceramic for filtering aluminum melt |
| CN114369424A (en) * | 2022-01-27 | 2022-04-19 | 佛山市宝昌珑消防科技有限责任公司 | Fireproof and corrosion-resistant material and preparation method thereof, and fireproof glue and preparation method thereof |
| CN114369424B (en) * | 2022-01-27 | 2022-11-15 | 佛山市宝昌珑消防科技有限责任公司 | Fireproof and corrosion-resistant material and preparation method thereof, and fireproof glue and preparation method thereof |
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Application publication date: 20180612 |