CN107032373B - A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology - Google Patents
A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology Download PDFInfo
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- CN107032373B CN107032373B CN201710365230.1A CN201710365230A CN107032373B CN 107032373 B CN107032373 B CN 107032373B CN 201710365230 A CN201710365230 A CN 201710365230A CN 107032373 B CN107032373 B CN 107032373B
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- 239000000843 powder Substances 0.000 title claims abstract description 144
- 239000000463 material Substances 0.000 title claims abstract description 80
- 235000010443 alginic acid Nutrition 0.000 title claims abstract description 53
- 229920000615 alginic acid Polymers 0.000 title claims abstract description 53
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229940072056 alginate Drugs 0.000 title claims abstract description 51
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 230000003647 oxidation Effects 0.000 title claims abstract description 46
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 239000011777 magnesium Substances 0.000 title claims abstract description 30
- 238000005516 engineering process Methods 0.000 title claims abstract description 26
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 26
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 145
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 116
- 239000002994 raw material Substances 0.000 claims abstract description 29
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 24
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 16
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 7
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 83
- 238000001354 calcination Methods 0.000 claims description 39
- 239000002253 acid Substances 0.000 claims description 32
- 229930182470 glycoside Natural products 0.000 claims description 32
- 150000002338 glycosides Chemical class 0.000 claims description 32
- 239000004577 thatch Substances 0.000 claims description 32
- 239000000126 substance Substances 0.000 claims description 29
- 229910001385 heavy metal Inorganic materials 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 239000004615 ingredient Substances 0.000 claims description 12
- 230000009257 reactivity Effects 0.000 claims description 12
- 244000248349 Citrus limon Species 0.000 claims description 11
- 235000005979 Citrus limon Nutrition 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims 1
- 239000012620 biological material Substances 0.000 abstract 1
- 239000002978 dental impression material Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000003837 high-temperature calcination Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 4
- 210000000214 mouth Anatomy 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/90—Compositions for taking dental impressions
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
- C01F5/08—Magnesia by thermal decomposition of magnesium compounds by calcining magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/65—Chroma (C*)
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Preparations (AREA)
Abstract
The invention belongs to biomaterial for medical purpose fields, are related to a kind of combined oxidation magnesium raw powder's production technology of tooth family alginate impression material in oral rectification.It is to decompose to obtain the magnesia of different activities and quality by high-temperature calcination in rotary kiln or eddy flow dynamic furnace respectively using the magnesium hydroxide of high-quality and light magnesium carbonate as raw material, and be prepared by fully mixing through ultra-fine grinding according to a certain ratio.Combined oxidation magnesium powder fineness prepared by the present invention is small, white color, volume are big, good dispersion, and activity is adjustable, to regulate and control the setting time of alginates dental impression material, and can increase the hardness of stamp, smoothness, reduces stamp deformation.
Description
Technical field
The present invention relates to a kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technologies, are mainly used for mouth
The tooth family alginate impression material of various Maxillary regions or oral soft tissue is produced during chamber is orthopedic.
Background technique
With gradually popularizing for " fine work oral cavity " this idea, many new technologies and materials are sent out in clinical position
Exhibition and application, high-accuracy property moulage start as more advanced and outstanding moulage by the joyous of most of clinicians
It meets and affirms.Oral cavity print material category is various, and the moulage used in clinical position is mainly include the following types: alginates print
Mold materials, polyether, elastomeric impression material, complaster and stamp cream etc..In actual application, stamp
The superiority and inferiority of the performance of material directly affects the quality of dummy, therefore proposes strict requirements to moulage, comprising: good
Biological property and chemical stability, mobility, elasticity and plasticity appropriate, good dimensional stability, when accurately solidifying
Between, intensity is good, and easy to operate, cheap, storage is stablized, and has pleasant smell, taste and color of beauty etc..
It is to produce the moulage with high-accuracy property in oral repairing clinic, it is desirable that moulage must have flowing
The performances such as property, elasticity, plasticity, dimensional stability.The setting time of moulage is also that an influence moulage is high-accuracy
Property an important factor for, so only make moulage in target setting time accurately solidification be just able to satisfy clinical oral doctor
Requirement.And tooth family alginate impression material just has the above excellent performance, main cause is the oxygen in moulage
Change magnesium and played important function, magnesia mainly plays Timing of solidification in moulage, structure is fixed, the work of magnesia
Property it is high, reactivity is strong, and the setting time of stamp is with regard to short；The effect of magnesia further includes the hardness that can increase moulage, light
Slippery is not easy to deform stamp.
Currently, the magnesia in widely used tooth family alginate impression material is mainly the oxidation of single quality both at home and abroad
Magnesium powder body, since the performance indicator to magnesium oxide powder requires disunity, the activity of single magnesium oxide product is not controlled well
System, therefore it is difficult the setting time of the final moulage of control accurate.
Summary of the invention
The magnesium oxide powder used in the moulage in current oral restoration there are aiming at the problem that, the present invention provides a kind of systems
Standby simple, coagulation result is good, the preparation side of the setting time accurately combined oxidation magnesium powder body of tooth family alginate impression material
Method.
The technical solution adopted by the present invention is that:
A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology, comprising the following steps:
A. magnesium hydrate powder raw material is chosen, magnesium hydroxide content is 96.0~99.5%, CaO≤1.5%, SO4 2-≤
0.3%, Cl-≤ 0.14%, heavy metal < 10ppm, As≤3ppm, acid non-soluble substance≤0.1%；
B. by raw material magnesium hydrate powder indirect heating rotary kiln high temperature be calcined decompose, and crush and screen and
Subpackage dress, obtains packed magnesium oxide powder product A；
C. light magnesium carbonate powder material, content of magnesia > 40~44.5%, CaO≤0.1%, SO are chosen4 2-≤
0.05%, Cl-≤ 0.05%, heavy metal < 10ppm, As≤3ppm, acid non-soluble substance≤0.05%；
D. light magnesium carbonate powder material is calcined in the rotary kiln high temperature of indirect heating and is decomposed, and crushed and screened
It is filled with subpackage, obtains packed magnesium oxide powder product B；
E. tooth family alginate impression material ingredient is carried out, the packed magnesium oxide powder product A and the bag are opened
Magnesium oxide powder product B is filled, the weight ratio according to magnesium oxide powder product A and magnesium oxide powder product B is 2.0~0.5:1.0
It is mixed, obtains the combined oxidation magnesium powder product that tooth family alginate impression material is.
Preferably, tooth family alginate impression material combined oxidation magnesium raw powder's production technology, the feed hydrogen
The laser particle size D50 of magnesium oxide powder is 1.5~2.0 μm, glycosides thatch whiteness >=95, calcination loss 30~33%.
Preferably, tooth family alginate impression material combined oxidation magnesium raw powder's production technology, the step b
In, raw material magnesium hydroxide is 500 DEG C~750 DEG C in the temperature that rotary kiln high temperature is calcined, and the residence time is 1~1.5h.
Preferably, tooth family alginate impression material combined oxidation magnesium raw powder's production technology, the oxidation
The fineness of magnesium powder product A reaches 325 mesh full by lemon acid value is between 100s~180s, bulk density≤0.35g/
cm3, glycosides thatch whiteness >=93.
Preferably, tooth family alginate impression material combined oxidation magnesium raw powder's production technology, the raw material are light
The laser particle size D50 of matter magnesium carbonate is 1.5~2.0 μm, glycosides thatch whiteness >=95, calcination loss 50~54.5%.
Preferably, tooth family alginate impression material combined oxidation magnesium raw powder's production technology, the step d
In, the temperature that the raw material light magnesium carbonate powder is calcined in rotary kiln high temperature is 800 DEG C~1100 DEG C, and the residence time is
1.5~2h.
Preferably, the fineness of the magnesium oxide powder product B reach 325 mesh full by, lemon acid value 50s~90s it
Between, bulk density≤0.15g/cm3, glycosides thatch whiteness >=93.
Tooth family alginate impression material combined oxidation magnesium raw powder's production technology, comprising the following specific steps
A. magnesium hydrate powder raw material, magnesium hydroxide content 97.3%, CaO 1.3%, SO are chosen4 2-For 0.3%,
Cl-For 0.10%, heavy metal 9ppm, As 3ppm, acid non-soluble substance 0.08%；Calcination loss is 31%, laser particle size D50
It is 1.8 μm, glycosides thatch whiteness is 96；
B. calcined by rotary kiln furnace is added in raw material magnesium hydrate powder, controls in rotary kiln front portion to latter part of
Temperature range is 575 DEG C~625 DEG C, and residence time of the material in calcining furnace controls the magnesia powder in 1.5h, after calcining
Body through vibrating screen obtain 325 mesh full by magnesium oxide powder product A；The reactivity lemon acid value area of chemical detection magnesia A
Between in 136s, bulk density 0.31g/cm3, glycosides thatch whiteness is 94；It is packaged and obtains packed magnesium oxide powder product A；
C. light magnesium carbonate powder material, content of magnesia 43.5%, CaO content 0.07%, SO are chosen4 2-For
0.035%, Cl-For 0.03%, heavy metal 6ppm, As 3ppm, acid non-soluble substance 0.045%；Calcination loss is 53.5%,
D50/ μm 1.7 of laser particle size, glycosides thatch whiteness is 95；
D. calcined by rotary kiln furnace is added in the light magnesium carbonate powder material, after front portion arrives in control rotary kiln
The temperature range of a part is 900 DEG C~1050 DEG C, and residence time of the material in calcining furnace controls in 1.8h；After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product B；The reactivity of chemical detection magnesia A
Lemon acid value section is in 76s, bulk density 0.15g/cm3, glycosides thatch whiteness is 94, is packaged and obtains packed magnesium oxide powder product
B。
Preferably, tooth family alginate impression material combined oxidation magnesium raw powder's production technology, further includes following
Specific steps:
When e. carrying out tooth family alginate impression material ingredient, the packed magnesium oxide powder product A and described is opened
Packed magnesium oxide powder product B, according to the weight proportion 2.0~0.5 of magnesium oxide powder product A and magnesium oxide powder product B:
1.0 are mixed, and are obtained the tooth family alginate impression material that activity value is 120s~85s, that is, are used combined oxidation magnesium powder product.
Important parameter of the setting time as moulage, the length of moulage setting time depend on reactant in moulage
The reactivity of the reactivity of reactivity, especially magnesia, magnesia is higher, and the time of moulage solidification is shorter.
The combined oxidation magnesium powder body is that two kinds of different magnesium oxide powders of quality are mixed i.e. with powder, wherein by feed hydrogen
The magnesium oxide powder product A activity that magnesia is calcined is lower, its setting time can be longer when using merely；By raw material lightweight
The activity for the magnesium oxide powder product B that magnesium carbonate is calcined is higher, its setting time can be shorter when using merely.It is using
When, according to moulage setting time needs, produced by changing the magnesium oxide powder product A and the magnesium oxide powder
The different ratio of product B, setting time needed for obtaining use magnesium oxide powder.Meanwhile the bulk density of the two is not also identical, leads to
Cross different proportions, it is also possible to obtain different stacking densities use combined oxidation magnesium powder body C.
The combined oxidation magnesium powder body of tooth family alginate impression material of the present invention has the following prominent advantages:
(1) combined oxidation magnesium powder body keeps the target setting time of tooth family alginate impression material more accurate；
(2) two kinds of magnesium oxide powders it is uniform compound, increase the molding success rate of moulage；
(3) thus after the production of moulage made from product molding, stamp is complete, it is clear, any surface finish, be convenient in demoulding.
Specific embodiment
Below by specific embodiment, present invention is further described in detail.
Embodiment 1
A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology, comprising the following steps:
(1) magnesium hydrate powder raw material is chosen, wherein Mg (OH)2Content is 97.3%, CaO 1.3%, SO4 2-For
0.3%, Cl-For 0.10%, heavy metal 9ppm, As 2ppm, acid non-soluble substance 0.08%, calcination loss 31.5% swashs
Light bead degree D50 is 1.8 μm, glycosides thatch whiteness is 96.
(2) calcined by rotary kiln furnace is added in the magnesium hydrate powder raw material, after front portion arrives in control rotary kiln
The temperature range of a part is 600 DEG C~625 DEG C, and residence time of the material in calcining furnace controls in 1.4h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product A.The reactivity of chemical detection magnesia A
Lemon acid value section is in 145s, bulk density 0.31g/cm3, glycosides thatch whiteness is 94.It is packaged and obtains packed magnesium oxide powder production
Product A, every bag of weight are 1kg.
(3) light magnesium carbonate magnesium oxide powder raw material, content of magnesia 43.5%, CaO 0.07%, SO are chosen4 2-For
0.035%, Cl-For 0.03%, heavy metal 6ppm, As 3ppm, acid non-soluble substance 0.045%, calcination loss 54.5%,
D50/ μm 1.4 of laser particle size, glycosides thatch whiteness are 95.
(4) calcined by rotary kiln furnace is added in the light magnesium carbonate powder material, controls front portion in rotary kiln and arrives
Latter part of temperature range is 950 DEG C~1050 DEG C, and residence time of the material in calcining furnace controls in 1.5h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product B.The reaction of chemical detection magnesia A is living
Property lemon acid value section is in 80s, bulk density 0.15g/cm3, glycosides thatch whiteness is 94.It is packaged and obtains packed magnesium oxide powder production
Product B, every bag of weight are 1kg.
When carrying out tooth family alginate impression material ingredient, the packed magnesium oxide powder product A and described is opened
Packed magnesium oxide powder product B, according to required setting time, according to different magnesium oxide powder product A and magnesium oxide powder
The weight proportion of product B obtains the combined oxidation magnesium powder product for the different activities that tooth family alginate impression material is.For
The proportion of other ingredients of specific tooth family alginate impression material, the combined oxidation magnesium powder product of different activities correspond to difference
Setting time.It is shown in Table 1.
Table 1: 1 product of embodiment is with when performance table
Embodiment 2
A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology, specifically includes the following steps:
(1) magnesium hydrate powder raw material is chosen, wherein Mg (OH)298.0%, CaO 1.0%, SO4 2-For 0.42%, Cl-
For 0.11%, heavy metal 8ppm, As 3ppm, acid non-soluble substance 0.09%, calcination loss 32%, laser particle size D50 are
1.6 μm, glycosides thatch whiteness be 97.
(2) calcined by rotary kiln furnace is added in the magnesium hydrate powder raw material, after front portion arrives in control rotary kiln
The temperature range of a part is 700 DEG C~740 DEG C, and residence time of the material in calcining furnace controls in 1.2h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product A.The reactivity of chemical detection magnesia A
Lemon acid value section is in 175s, bulk density 0.34g/cm3, glycosides thatch whiteness is 95.It is packaged and obtains packed magnesium oxide powder production
Product A, every bag of weight are 1kg.
(3) light magnesium carbonate magnesium oxide powder raw material, content of magnesia 42.5%, CaO 0.09%, SO are chosen4 2-For
0.045%, Cl-For 0.04%, heavy metal 7ppm, As 4ppm, acid non-soluble substance 0.035%；Calcination loss is 52.5%,
D50/ μm 1.3 of laser particle size, glycosides thatch whiteness is 96.
(4) calcined by rotary kiln furnace is added in the light magnesium carbonate powder material, controls front portion in rotary kiln and arrives
Latter part of temperature range is 850 DEG C~900 DEG C, and residence time of the material in calcining furnace controls in 1.8h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product B.The reaction of chemical detection magnesia A is living
Property lemon acid value section is in 55s, bulk density 0.13g/cm3, glycosides thatch whiteness is 94.It is packaged and obtains packed magnesium oxide powder production
Product B, every bag of weight are 1kg.
When carrying out tooth family alginate impression material ingredient, the packed magnesium oxide powder product A and described is opened
Packed magnesium oxide powder product B, according to required setting time, according to different magnesium oxide powder product A and magnesium oxide powder
The weight proportion of product B obtains the combined oxidation magnesium powder product for the different activities that tooth family alginate impression material is.For
The proportion of other ingredients of specific tooth family alginate impression material, the combined oxidation magnesium powder product of different activities correspond to difference
Setting time.It is shown in Table 2.
Table 2: 2 product of embodiment is with when performance table
Embodiment 3
A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology, comprising the following steps:
(1) magnesium hydrate powder raw material is chosen, wherein Mg (OH)299.0%, CaO 0.5%, SO4 2-For 0.32%, Cl-
For 0.10%, heavy metal 6ppm, As 2ppm, acid non-soluble substance 0.08%, calcination loss 31.5%, laser particle size D50
For 1.8 μm, glycosides thatch whiteness be 97.
(2) calcined by rotary kiln furnace is added in the magnesium hydrate powder raw material, after front portion arrives in control rotary kiln
The temperature range of a part is 520 DEG C~550 DEG C, and residence time of the material in calcining furnace controls in 1.5h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product A.The reactivity of chemical detection magnesia A
Lemon acid value section is in 125s, bulk density 0.30g/cm3, glycosides thatch whiteness is 96.It is packaged and obtains packed magnesium oxide powder production
Product A, every bag of weight are 1kg.
(3) light magnesium carbonate magnesium oxide powder raw material, content of magnesia 44.5%, CaO 0.05%, SO are chosen4 2-For
0.025%, Cl-For 0.02%, heavy metal 8ppm, As 3ppm, acid non-soluble substance 0.025%, calcination loss 54.5%,
D50/ μm 1.5 of laser particle size, glycosides thatch whiteness are 96.
(4) calcined by rotary kiln furnace is added in the light magnesium carbonate powder material, controls front portion in rotary kiln and arrives
Latter part of temperature range is 900 DEG C~950 DEG C, and residence time of the material in calcining furnace controls in 1.7h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product B.The reaction of chemical detection magnesia A is living
Property lemon acid value section is in 65s, bulk density 0.13g/cm3, glycosides thatch whiteness is 94.It is packaged and obtains packed magnesium oxide powder production
Product B, every bag of weight are 1kg.
When carrying out tooth family alginate impression material ingredient, the packed magnesium oxide powder product A and described is opened
Packed magnesium oxide powder product B, according to required setting time, according to different magnesium oxide powder product A and magnesium oxide powder
The weight proportion of product B obtains the combined oxidation magnesium powder product for the different activities that tooth family alginate impression material is.For
The proportion of other ingredients of specific tooth family alginate impression material, the combined oxidation magnesium powder product of different activities correspond to difference
Setting time.It is shown in Table 3.
Table 3: 3 product of embodiment is with when performance table
Embodiment 4
A kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology, comprising the following steps:
(1) magnesium hydrate powder raw material is chosen, wherein Mg (OH)298.5%, CaO 0.3%, SO4 2-For 0.12%, Cl-
For 0.04%, heavy metal 9ppm, As 3ppm, acid non-soluble substance 0.08%, calcination loss 32.5%, laser particle size D50
For 1.9 μm, glycosides thatch whiteness be 96.
(2) calcined by rotary kiln furnace is added in the magnesium hydrate powder raw material, after front portion arrives in control rotary kiln
The temperature range of a part is 620 DEG C~650 DEG C, and residence time of the material in calcining furnace controls in 1.1h.After calcining
Magnesium oxide powder through vibrating screen obtain 325 mesh full by magnesium oxide powder product A.The reactivity of chemical detection magnesia A
Lemon acid value section is in 138s, bulk density 0.32g/cm3, glycosides thatch whiteness is 95.It is packaged and obtains packed magnesium oxide powder production
Product A, every bag of weight are 1kg.
(3) light magnesium carbonate magnesium oxide powder raw material, content of magnesia 44.%, CaO 0.06%, SO are chosen4 2-For
0.03%, Cl-For 0.03%, heavy metal 8ppm, As 2ppm, acid non-soluble substance 0.03%, calcination loss 53.5%, swash
D50/ μm 1.3 of light bead degree, glycosides thatch whiteness are 98.
(4) calcined by rotary kiln furnace is added in the light magnesium carbonate powder material, controls front portion in rotary kiln and arrives
Latter part of temperature range is 1000 DEG C~1050 DEG C, and residence time of the material in calcining furnace controls in 1.7h.Calcine it
Magnesium oxide powder afterwards through vibrating screen obtain 325 mesh full by magnesium oxide powder product B.The reaction of chemical detection magnesia A
Active lemon acid value section is in 76s, bulk density 0.14g/cm3, glycosides thatch whiteness is 97.It is packaged and obtains packed magnesium oxide powder
Product B, every bag of weight are 1kg.
When carrying out tooth family alginate impression material ingredient, the packed magnesium oxide powder product A and described is opened
Packed magnesium oxide powder product B, according to required setting time, according to different magnesium oxide powder product A and magnesium oxide powder
The weight proportion of product B obtains the combined oxidation magnesium powder product for the different activities that tooth family alginate impression material is.For
The proportion of other ingredients of specific tooth family alginate impression material, the combined oxidation magnesium powder product of different activities correspond to difference
Setting time.See below table 4.
Table 4: 4 product of embodiment is with when performance table
Claims (9)
1. a kind of tooth family alginate impression material combined oxidation magnesium raw powder's production technology, it is characterized in that: the following steps are included:
A. magnesium hydrate powder raw material is chosen, magnesium hydroxide content is 96.0~99.5%, CaO≤1.5%, SO4-2≤ 0.3%,
Cl-≤ 0.14%, heavy metal < 10ppm, As≤3ppm, acid non-soluble substance≤0.1%；
B. raw material magnesium hydrate powder is calcined in the rotary kiln high temperature of indirect heating and is decomposed, and crushed and screened and subpackage
Dress, obtains packed magnesium oxide powder product A；
C. light magnesium carbonate powder material, content of magnesia > 40~44.5%, CaO≤0.1%, SO are chosen4 -2≤ 0.05%,
Cl-≤ 0.05%, heavy metal < 10ppm, As≤3ppm, acid non-soluble substance≤0.05%；
D. light magnesium carbonate powder material is calcined in the rotary kiln high temperature of indirect heating and is decomposed, and crushed and screened and divided
Packaging, obtains packed magnesium oxide powder product B；
E. tooth family alginate impression material ingredient is carried out, the packed magnesium oxide powder product A and the packed oxygen are opened
Change magnesium powder product B, is 2.0~0.5:1.0 progress according to the weight ratio of magnesium oxide powder product A and magnesium oxide powder product B
Mixing obtains the combined oxidation magnesium powder product that tooth family alginate impression material is.
2. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be: the laser particle size D50 of the raw material magnesium hydrate powder be 1.5~2.0 μm, glycosides thatch whiteness >=95, calcination loss 30~
33%.
3. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be: in the step b, raw material magnesium hydroxide is 500 DEG C~750 DEG C in the temperature that rotary kiln high temperature is calcined, the residence time 1
~1.5h.
4. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be: the fineness of the magnesium oxide powder product A reaches 325 mesh full by lemon acid value is accumulated close between 100s~180s
Degree≤0.35g/cm3, glycosides thatch whiteness >=93.
5. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be: the laser particle size D50 of the raw material light magnesium carbonate be 1.5~2.0 μm, glycosides thatch whiteness >=95, calcination loss 50~
54.5%.
6. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be: in the step d, the raw material light magnesium carbonate powder is 800 DEG C~1100 DEG C in the temperature that rotary kiln high temperature is calcined,
Residence time is 1.5~2h.
7. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be: the fineness of the magnesium oxide powder product B reaches 325 mesh full by, lemon acid value between 50s~90s, and bulk density≤
0.15g/cm3, glycosides thatch whiteness >=93.
8. tooth family alginate impression material according to claim 1 combined oxidation magnesium raw powder's production technology, feature
Be comprising the following specific steps
A. magnesium hydrate powder raw material, magnesium hydroxide content 97.3%, CaO 1.3%, SO are chosen4 2-For 0.3%, Cl-For
0.10%, heavy metal 9ppm, As 3ppm, acid non-soluble substance 0.08%；Calcination loss is 31%, laser particle size D50 is 1.8
μm, glycosides thatch whiteness be 96；
B. calcined by rotary kiln furnace is added in raw material magnesium hydrate powder, controls in rotary kiln front portion to latter part of temperature
Range is 575 DEG C~625 DEG C, and residence time of the material in calcining furnace controls the magnesium oxide powder warp in 1.5h, after calcining
Vibrating screen obtain 325 mesh full by magnesium oxide powder product A；The reactivity lemon acid value section of chemical detection magnesia A exists
136s, bulk density 0.31g/cm3, glycosides thatch whiteness is 94；It is packaged and obtains packed magnesium oxide powder product A；
C. light magnesium carbonate powder material, content of magnesia 43.5%, CaO content 0.07%, SO are chosen4 2-For
0.035%, Cl-For 0.03%, heavy metal 6ppm, As 3ppm, acid non-soluble substance 0.045%；Calcination loss is 53.5%,
Laser particle size D50 is 1.7 μm, and glycosides thatch whiteness is 95；
D. calcined by rotary kiln furnace is added in the light magnesium carbonate powder material, controls in rotary kiln front portion to latter portion
The temperature range divided is 900 DEG C~1050 DEG C, and residence time of the material in calcining furnace controls in 1.8h；Oxidation after calcining
Magnesium powder body through vibrating screen obtain 325 mesh full by magnesium oxide powder product B；The reactivity lemon acid of chemical detection magnesia A
It is worth section in 76s, bulk density 0.15g/cm3, glycosides thatch whiteness is 94, is packaged and obtains packed magnesium oxide powder product B.
9. tooth family alginate impression material according to claim 8 combined oxidation magnesium raw powder's production technology, feature
It is to also include the following specific steps:
When e. carrying out tooth family alginate impression material ingredient, the packed magnesium oxide powder product A and described packed is opened
Magnesium oxide powder product B, according to magnesium oxide powder product A and magnesium oxide powder product B 2.0~0.5:1.0 of weight proportion into
Row mixing obtains the tooth family alginate impression material that activity value is 120s~85s, that is, uses combined oxidation magnesium powder product.
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| CN101643227A (en) * | 2009-08-28 | 2010-02-10 | 上海宗巍科技发展有限公司 | Preparation method of special magnesium oxide for grain-oriented silicon steel sheet |
| CN101707913A (en) * | 2007-06-05 | 2010-05-12 | 达泰豪化学工业株式会社 | magnesium oxide powder |
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| JPS5860616A (en) * | 1981-10-07 | 1983-04-11 | Toyo Denka Kogyo Kk | Preparation of high purity magnesium oxide |
| JPS60161328A (en) * | 1984-01-27 | 1985-08-23 | Natl Inst For Res In Inorg Mater | Preparation of magnesia powder having high purity |
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| CN101707913A (en) * | 2007-06-05 | 2010-05-12 | 达泰豪化学工业株式会社 | magnesium oxide powder |
| CN101643227A (en) * | 2009-08-28 | 2010-02-10 | 上海宗巍科技发展有限公司 | Preparation method of special magnesium oxide for grain-oriented silicon steel sheet |
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