CN107352940A - A kind of magnesia pelletizing and preparation method thereof - Google Patents
A kind of magnesia pelletizing and preparation method thereof Download PDFInfo
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- CN107352940A CN107352940A CN201610300835.8A CN201610300835A CN107352940A CN 107352940 A CN107352940 A CN 107352940A CN 201610300835 A CN201610300835 A CN 201610300835A CN 107352940 A CN107352940 A CN 107352940A
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- China
- Prior art keywords
- magnesia
- pelletizing
- binding agent
- powder
- compound
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 316
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 175
- 238000005453 pelletization Methods 0.000 title claims abstract description 108
- 238000002360 preparation method Methods 0.000 title claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 69
- 150000001875 compounds Chemical class 0.000 claims abstract description 67
- 239000011230 binding agent Substances 0.000 claims abstract description 61
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 29
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 29
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 29
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 29
- 229920002261 Corn starch Polymers 0.000 claims abstract description 28
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000008120 corn starch Substances 0.000 claims abstract description 28
- 229940099112 cornstarch Drugs 0.000 claims abstract description 28
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 28
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 28
- 239000006188 syrup Substances 0.000 claims abstract description 25
- 235000020357 syrup Nutrition 0.000 claims abstract description 25
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004021 humic acid Substances 0.000 claims abstract description 23
- 239000008188 pellet Substances 0.000 claims abstract description 23
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 23
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 22
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 22
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 20
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 20
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 20
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 20
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 20
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 20
- 238000005245 sintering Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- ORVGYTXFUWTWDM-UHFFFAOYSA-N silicic acid;sodium Chemical compound [Na].O[Si](O)(O)O ORVGYTXFUWTWDM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 239000002002 slurry Substances 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 16
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000001095 magnesium carbonate Substances 0.000 abstract description 8
- 235000014380 magnesium carbonate Nutrition 0.000 abstract description 8
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000010309 melting process Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- 229910052749 magnesium Inorganic materials 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000004520 agglutination Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000010792 warming Methods 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 description 3
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- -1 compound compound Chemical class 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 229940068041 phytic acid Drugs 0.000 description 3
- 235000002949 phytic acid Nutrition 0.000 description 3
- 239000000467 phytic acid Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 241001131796 Botaurus stellaris Species 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- YGJZDMFVIMWCHL-UHFFFAOYSA-N [Na].[Mg].[K] Chemical compound [Na].[Mg].[K] YGJZDMFVIMWCHL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000011822 basic refractory Substances 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- C04B2/00—Lime, magnesia or dolomite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
A kind of magnesia pelletizing and preparation method thereof.This method includes：Prepare the compound binding agent containing sodium carboxymethylcellulose, humic acid, cornstarch, acrylic resin, syrup, polyvinylpyrrolidone, polyacrylamide, sodium metasilicate and calcium hydroxide, magnesia powder powder stock is mixed with compound binding agent, obtain compound, then the compound is obtained into finished pellet after pressure ball, drying, sintering, the magnesia powder powder stock is high-purity magnesium oxide, and its MgO chemical composition is more than 92wt%.The magnesia pelletizing or magnesia pellet strength obtained according to the compound binding agent of the present invention is high, do not allow in electric melting process broken, and love preparation technology it is simple, may be directly applied to industrial mass production, avoid powder directly enter stove caused by the working of a furnace deteriorate and pollution on the environment.Magnesia pelletizing prepared by the present invention can be directly used for preparing fused magnesite.
Description
Technical field
The present invention relates to a kind of oxygen for preparing the compound binding agent of magnesia pelletizing and being obtained by the compound binding agent
Change magnesium pelletizing.The magnesia pellet strength is high, does not allow in electric melting process broken, and likes that preparation technology is simple, can be direct
Applied to industrial mass production, avoid powder directly enter stove caused by the working of a furnace deteriorate and pollution on the environment.
Background technology
Basic material of the fused magnesite as production basic refractory, has good high-temperature stability, corrosion resistance
And heat-conductive characteristic, it is widely used in industries such as steel, building materials, glass.
Generally, the production of fused magnesite can be obtained using the direct electrically smelting of giobertite raw material, can will also be contained magnesium raw material and first be made
It is made into magnesium oxide powder, then by the magnesium oxide powder in electric arc furnaces high temperature melting recrystallization.
By the magnesium oxide powder in electric arc furnaces high temperature melting recrystallization be made fused magnesite production process in, palpus
Magnesia pelletizing is made in the magnesium oxide powder, then the magnesia pelletizing is directly prepared into magnesia.
Generally, the preparation method of the magnesia pelletizing including magnesia pelletizing, it is to add raw materials into additive, compound
The dispensings such as binding agent, the process of pelletizing is prepared into after well mixed by equipment such as ball press, ball press, fluid beds.The oxygen
Change magnesium pelletizing preparation method and be widely used in all many-sides such as pharmacy, coal, bio-fuel, metallurgy.
However, according to the preparation method of conventional magnesia pelletizing, pelletizing is easily broken in electric melting process, the thing of pelletizing
Material density and intensity have much room for improvement, and pellet characteristics are to be improved can improve the magnesia performance finally prepared.In addition, in addition, with
Toward pelletizing process complexity is prepared, charging is inconvenient, it is difficult to directly applies to industrial mass production, and is difficult to avoid that powder directly enters
The working of a furnace caused by stove deteriorates, it is difficult to avoids dust from polluting environment.
Because influenceing magnesia pellet characteristics has briquetting pressure, moisture, compound binding agent, particle diameter, drying mode etc.
Factors, wherein compound binding agent are its principal elements.
So far, the correlative study prepared both at home and abroad to magnesia pelletizing, particularly magnesia pelletizing is rarely reported, and is lacked
The weary correlative study to magnesia pelletizing, the particularly compound binding agent of magnesia pelletizing and its mechanism of action, also lack maturation
Prepare magnesia pelletizing using magnesium oxide powder, then the magnesia pelletizing is directly prepared into the process route of magnesia.
Therefore, this neighborhood needs one kind to be used to prepare the compound binding agent of magnesia pelletizing (ore deposit) and by the compound binding agent
Obtained magnesia pelletizing, it is particularly a kind of to be used to prepare the compound binding agent of magnesia pelletizing and obtained by the compound binding agent
Magnesia pelletizing and the magnesia pelletizing preparation method so that the magnesia pelletizing or magnesia pelletizing are in electric smelting
Do not allow broken in journey, the material density and intensity of the magnesia pelletizing or magnesia ball improve, and pellet characteristics improve with energy
Improve the magnesia performance finally prepared.And require that the preparation technology of magnesia pelletizing or magnesia the ball pelletizing is simple, feed
It is convenient, may be directly applied to industrial mass production, avoid powder directly enter stove caused by the working of a furnace deteriorate and dust is to environment
Pollute.
The content of the invention
For solve the problems, such as it is existing lack magnesia pelletizing preparation technology route is studied, overcome prior art insufficient, this
The purpose of invention is, there is provided a kind of oxygen for preparing the compound binding agent of magnesia pelletizing and being obtained by the compound binding agent
Change magnesium pelletizing；
The present invention also aims to a kind of, there is provided magnesia pelletizing and its prepare magnesia using above-mentioned binding agent
The method of pelletizing.
It is high according to the obtained magnesia pellet strength of compound binding agent of the present invention, do not allow in electric melting process it is broken,
And love preparation technology it is simple, may be directly applied to industrial mass production, avoid powder directly enter stove caused by the working of a furnace deteriorate and
Pollution on the environment.
The magnesia pelletizing of the present invention can be directly used for preparing fused magnesite.
To reach above-mentioned purpose, the technical scheme of magnesia pelletizing of the invention is as follows：
A kind of magnesia pelletizing, it is characterised in that
The magnesia pelletizing system adds magnesium oxide powder after compound binding agent is well mixed through pressure ball, drying, sintering
After obtain finished product magnesia pelletizing, it is characterised in that
The compound binding agent is by compound compound of sodium carboxymethylcellulose, polyacrylamide and sodium metasilicate and calcium hydroxide
Binding agent, wherein,
Based on the magnesium oxide powder of 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and silicic acid sodium content are such as
Under：
Sodium carboxymethylcellulose：0.1-1.5wt%,
Polyacrylamide：0.1-2.0wt%,
Sodium metasilicate：0.2-3.0wt%,
Calcium hydroxide：0.2-4.0wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
Based on the magnesium oxide powder of 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and silicic acid sodium content are such as
Under：
Sodium carboxymethylcellulose：0.2-0.6wt%,
Polyacrylamide：0.2-0.6wt%,
Sodium metasilicate：0.4-0.8wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
The compound binding agent also includes cornstarch, humic acid and acrylic resin, the magnesia based on 100 parts by weight
Powder, the cornstarch, humic acid and acrylic resin content are as follows：
Cornstarch：0.2-3.5wt%,
Humic acid：0.2-4.0wt%
Acrylic resin：0.2-5.0wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
The cornstarch of the compound binding agent, humic acid and acrylic resin content are as follows：
Cornstarch：0.3-0.6wt%,
Humic acid：0.3-0.8%wt%,
Acrylic resin：0.3-0.8wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
The compound binding agent also includes syrup, polyvinylpyrrolidone, based on the magnesium oxide powder of 100 parts by weight, institute
Syrup is stated, polyvinyl pyrrolidone content is as follows：
Syrup：0.2-4.0wt%,
Polyvinylpyrrolidone：0.2-5.0wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
The syrup, polyvinyl pyrrolidone content are as follows：
Syrup：0.2-0.8wt%,
Polyvinylpyrrolidone：0.2-0.6wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
Niter ash content：0.4-0.8wt%.
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
The magnesia pelletizing system adds magnesium oxide powder after above-mentioned binding agent is well mixed through pressure ball, drying, sintering
After obtain finished pellet, the magnesia powder powder stock is high-purity magnesium oxide, and its MgO chemical composition is more than 92wt%, the oxygen
Change magnesium pelletizing value following ranges：Φ 20 × 10mm-, 50 × 32mm of Φ, specifically 20 × 10mm of Φ, 25 × 13mm of Φ, Φ 30 ×
15mm、Φ35×17mm、Φ40×22mm、Φ50×32mm。
According to a kind of magnesia pelletizing of the present invention, it is characterised in that
Compression strength reaches more than 780N/ after the magnesia pelletizing is sintered.
A kind of preparation method of magnesia pelletizing, magnesia powder powder stock is mixed with compound binding agent, obtains compound,
Then the compound is obtained into finished pellet after pressure ball, drying, sintering, it is characterised in that
The compound binding agent is by compound compound of sodium carboxymethylcellulose, polyacrylamide and sodium metasilicate and calcium hydroxide
Binding agent, the magnesia powder powder stock are high-purity magnesium oxide, and its MgO chemical composition is more than 92wt%,
Wherein,
Based on the magnesium oxide powder of 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and silicic acid sodium content are such as
Under：
Sodium carboxymethylcellulose：0.1-1.5wt%,
Polyacrylamide：0.1-2.0wt%,
Sodium metasilicate：0.2-3.0wt%,
Calcium hydroxide：0.2-4.0wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
Magnesia magnesium oxide powder based on 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and sodium metasilicate
Content is as follows：
Sodium carboxymethylcellulose：0.2-0.6wt%,
Polyacrylamide：0.2-0.6wt%,
Sodium metasilicate：0.4-0.8wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
The compound binding agent also includes cornstarch, humic acid and acrylic resin, the magnesia based on 100 parts by weight
Powder, the cornstarch, humic acid and acrylic resin content are as follows：
Cornstarch：0.2-3.5wt%,
Humic acid：0.2-4.0wt%
Acrylic resin：0.2-5.0wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
The cornstarch of the compound binding agent, humic acid and acrylic resin content are as follows：
Cornstarch：0.3-0.6wt%,
Humic acid：0.3-0.8%wt%,
Acrylic resin：0.3-0.8wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
The compound binding agent also includes syrup, polyvinylpyrrolidone, based on the magnesium oxide powder of 100 parts by weight, institute
Syrup is stated, polyvinyl pyrrolidone content is as follows：
Syrup：0.2-4.0wt%,
Polyvinylpyrrolidone：0.2-5.0wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
The syrup, polyvinyl pyrrolidone content are as follows：
Syrup：0.2-0.8wt%,
Polyvinylpyrrolidone：0.2-0.6wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
The addition of the calcium hydroxide is 0.4-0.8wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that
The magnesia extracts from the magnesium ore deposit in Qinghai Chaerhan salt lakes bittern.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that：
The condition of the pressure ball includes：Water addition is 7-13wt%, preferably 8-12wt%.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that：
The briquetting pressure of the pressure ball is 5-30MPa, and described drying temperature is 100-150 DEG C, drying time：5-7 is small
When.
Dispensing is put into the ball press that die size is 30 × 15mm of Φ, regulation briquetting pressure is 5-30MPa, by dispensing
Briquetting, obtain 30 × 15mm of Φ pelletizing.
Described drying：Pelletizing is put into the baking oven that temperature is 100-150 DEG C, 5-7 hours is dried, takes out, be cooled to room
Temperature.
According to a kind of preparation method of magnesia pelletizing of the present invention, it is characterised in that：
The sintering condition is：Pelletizing is placed in corundum crucible, corundum crucible is put into temperature programming stove and sintered, institute
It is 1000-1300 DEG C to state sintering temperature, time 10-30min.
Compared with prior art, the positive effect of the present invention is：
(1) process route of magnesia pelletizing preparation is developed
At present, the research to pelletizing method is more, but lacks the research of the process route to magnesia pelletizing, and the present invention provides
One process route for preparing magnesia pelletizing, can be directly used for preparing fused magnesite, while meet intensity requirement, in electricity
Do not broken up during molten.
(2) technique is simple
Material is equipped with using pelletizing method, improves material density and intensity, the performance for improving pelletizing is finally prepared with that can improve
Magnesia performance；Carried out in addition, this powder prepares pelletizing directly in ball press, technique is simple, can directly apply to industry
Large-scale production, has wide industrial prospect.
(3) environmental protection
The magnesia extracted using Qinghai Chaerhan salt lakes magnesium resource is prepared into pelletizing and carries out electric smelting again, can avoid powder
The working of a furnace deteriorates caused by material directly enters stove, and charging is convenient, avoids dust from polluting environment, while can also save raw material.
Brief description of the drawings
Fig. 1 is the method flow diagram for preparing magnesia pelletizing of the present invention.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explained invention, is not intended to limit the invention.
First, prepare containing sodium carboxymethylcellulose, humic acid, cornstarch, acrylic resin, syrup, polyethylene pyrrole
Pyrrolidone, polyacrylamide, the compound binding agent of sodium metasilicate and calcium hydroxide, magnesia powder powder stock is mixed with compound binding agent
Close, obtain compound, the compound is then obtained into finished pellet after pressure ball, drying, sintering.
The magnesia powder powder stock is high-purity magnesium oxide, and its MgO chemical composition is more than 92wt%；The carboxymethyl cellulose
The addition of plain sodium is 0.2-0.6wt%, and the addition of humic acid is 0.3-0.8wt%, and the addition of cornstarch is 0.3-
0.6wt%, the addition of acrylic resin are 0.3-0.8wt%, and the addition of syrup is 0.2-0.8wt%, polyvinyl pyrrole
The addition of alkanone is 0.2-0.6wt%, and the addition of polyacrylamide is 0.2-0.6wt%, and the addition of sodium metasilicate is
0.4-0.8wt%, the addition of calcium hydroxide is 0.4-0.8wt%.The sintering temperature is 1000-1300 DEG C, time 10-
30min。
According to the present invention, sodium carboxymethylcellulose, humic acid, cornstarch, acrylic resin, syrup, poly- second will be contained
Alkene pyrrolidone, polyacrylamide, the compound binding agent of sodium metasilicate and calcium hydroxide prepare with water in advance, relative to 100 weight
The magnesium oxide powder of part, the moisture is 7-13 parts by weight, preferably 8-12 parts by weight.In the present invention, the water addition
Amount refers to that the weight of pressure ball process reclaimed water accounts for the weight of whole pressure ball materials (including raw materials of magnesium oxide, compound binding agent and water)
Percentage.The mixing can be carried out on batch mixer or damp mill, so that magnesium oxide powder is well mixed with compound binding agent,
Obtain compound.
Relative to the magnesium oxide powder of 100 parts by weight, the addition of the sodium carboxymethylcellulose is 0.2-0.6 weights
Measure part, the dosage of humic acid is 0.3-0.8 parts by weight, and the dosage of cornstarch is 0.3-0.6 parts by weight, the use of acrylic resin
Measure as 0.3-0.8 parts by weight, the dosage of syrup is 0.2-0.8 parts by weight, and the dosage of polyvinylpyrrolidone is 0.2-0.6 weight
Part, the dosage of polyacrylamide is 0.2-0.6 parts by weight, and the dosage of sodium metasilicate is 0.4-0.8 parts by weight, and the dosage of calcium hydroxide is
0.4-0.8 parts by weight.
In the present embodiment, the pelletizing preparation to mixed compound is carried out in ball press, the mould of the ball press
Size is 30 × 15mm of Φ (ball-and-socket shape), briquetting pressure 5-30MPa.
Preparation in accordance with the present invention, the green-ball need that processing is dried before sintering, so that the green-ball energy
The temperature stress and drop resistant ability then sintered is enough born, to avoid pelletizing structure from destroying.Described drying is carried out in an oven,
Drying temperature is 100-150 DEG C, drying time 5-7h.
Preparation in accordance with the present invention, to make magnesia crystallization promote grain growth.In the present invention, the sintering temperature
For 1000-1300 DEG C, time 10-30min, it can make magnesia pelletizing that there is higher intensity.
The invention will be further described with reference to embodiments, but the scope of the present invention is not limited in following implementation
Example.In the examples below, raw materials of magnesium oxide extracts from Qinghai Chaerhan salt lakes magnesium resource, and wherein content of MgO is higher than 92%.
Embodiment 1
The present embodiment is used for the magnesia pellet binder and its pelletizing preparation method for illustrating the present invention.
The magnesia purity of magnesia powder powder stock used is 92.5wt% MgO, rotten by sodium carboxymethylcellulose 20g
Phytic acid 30g, cornstarch 30g, acrylic resin 30g, syrup 20g, polyvinylpyrrolidone 20g, polyacrylamide 20g, silicon
After sour sodium 40g, calcium hydroxide 40g and 0.9kg water preparation agglutination binding agent compound is mixed to get with 8.8kg.
The compound is poured into ball press, using ball press (briquetting pressure 10MPa) pressure ball, obtain size for Φ 30 ×
15mm green pellets.Then by the green-ball in an oven, drying temperature is under 100 DEG C, dries 5h and obtains dry bulb group.By dry bulb
Group is placed in temperature programming stove, and 1100 DEG C, constant temperature 10min are warming up to 4 DEG C/min speed, and reaction terminates rear natural cooling,
Obtain agglomerate.The parameters such as the intensity of the pelletizing are as shown in table 1.
Embodiment 2
The present embodiment is used for the magnesia pellet binder and its pelletizing preparation method for illustrating the present invention.
The magnesia purity of magnesia powder powder stock used is 94.4wt% MgO, rotten by sodium carboxymethylcellulose 30g
Phytic acid 40g, cornstarch 40g, acrylic resin 30g, syrup 40g, PVPK30 g, polyacrylamide 35g, silicon
After sour sodium 50g, calcium hydroxide 45g and 1.0kg water preparation agglutination binding agent compound is mixed to get with 8.7kg.
The compound is poured into ball press, using ball press (briquetting pressure 15MPa) pressure ball, obtain size for Φ 30 ×
15mm green pellets.Then by the green-ball in an oven, drying temperature is under 100 DEG C, dries 5h and obtains dry bulb group.By dry bulb
Group is placed in temperature programming stove, and 1200 DEG C, constant temperature 20min are warming up to 4 DEG C/min speed, and reaction terminates rear natural cooling,
Obtain agglomerate.The parameters such as the intensity of the pelletizing are as shown in table 1.
Embodiment 3
The present embodiment is used for the magnesia pellet binder and its pelletizing preparation method for illustrating the present invention.
The magnesia purity of magnesia powder powder stock used is 97.5wt% MgO, rotten by sodium carboxymethylcellulose 45g
Phytic acid 50g, cornstarch 45g, acrylic resin 50g, syrup 50g, polyvinylpyrrolidone 45g, polyacrylamide 40g, silicon
After sour sodium 55g, calcium hydroxide 50g and 1.1kg water preparation agglutination binding agent compound is mixed to get with 8.5kg.
The compound is poured into ball press, using ball press (briquetting pressure 25MPa) pressure ball, obtain size for Φ 30 ×
15mm green pellets.Then by the green-ball in an oven, drying temperature is under 100 DEG C, dries 5h and obtains dry bulb group.By dry bulb
Group is placed in temperature programming stove, and 1250 DEG C, constant temperature 25min are warming up to 4 DEG C/min speed, and reaction terminates rear natural cooling,
Obtain agglomerate.The parameters such as the intensity of the pelletizing are as shown in table 1.
Table 1
Embodiment 4
The magnesia purity of magnesia powder powder stock used is 93wt% MgO, and by sodium carboxymethylcellulose 25g, corruption is planted
Sour 35g, cornstarch 30g, acrylic resin 30g, polyacrylamide 30g, sodium metasilicate 40g, calcium hydroxide 40g and 0.9kg water
After preparation agglutination binding agent compound is mixed to get with 8.8kg magnesium oxide powders.
The compound is poured into ball press, using ball press (briquetting pressure 10MPa) pressure ball, obtain size for Φ 30 ×
15mm green pellets.Then by the green-ball in an oven, drying temperature is under 100 DEG C, dries 5h and obtains dry bulb group.By dry bulb
Group is placed in temperature programming stove, and 1150 DEG C, constant temperature 10min are warming up to 4 DEG C/min speed, and reaction terminates rear natural cooling,
Obtain agglomerate.The parameters such as the intensity of the pelletizing are as shown in table 2.
Embodiment 5
The present embodiment is used for the magnesia pellet binder and its pelletizing preparation method for illustrating the present invention.
The magnesia purity of magnesia powder powder stock used is 94wt% MgO, and by sodium carboxymethylcellulose 30g, corruption is planted
Sour 40g, acrylic resin 30g, syrup 40g, PVPK30 g, polyacrylamide 40g, sodium metasilicate 50g, with 1.0kg
Water prepare agglutination binding agent after with 8.7kg magnesium oxide powders be mixed to get compound.
The compound is poured into ball press, using ball press (briquetting pressure 15MPa) pressure ball, obtain size for Φ 30 ×
15mm green pellets.Then by the green-ball in an oven, drying temperature is under 100 DEG C, dries 5h and obtains dry bulb group.By dry bulb
Group is placed in temperature programming stove, and 1200 DEG C, constant temperature 20min are warming up to 4 DEG C/min speed, and reaction terminates rear natural cooling,
Obtain agglomerate.The parameters such as the intensity of the pelletizing are as shown in table 2.
Embodiment 6
The present embodiment is used for the magnesia pellet binder and its pelletizing preparation method for illustrating the present invention.
The magnesia purity of magnesia powder powder stock used is 97.5wt% MgO, rotten by sodium carboxymethylcellulose 45g
Cornstarch 45g, acrylic resin 50g, PVP g, polyacrylamide 40g, sodium metasilicate 60g, calcium hydroxide 50g
With being mixed to get compound with 8.6kg magnesium oxide powders after 1.1kg water preparation agglutination binding agent.
The compound is poured into ball press, using ball press (briquetting pressure 25MPa) pressure ball, obtain size for Φ 30 ×
15mm green pellets.Then by the green-ball in an oven, drying temperature is under 100 DEG C, dries 5h and obtains dry bulb group.By dry bulb
Group is placed in temperature programming stove, and 1250 DEG C, constant temperature 25min are warming up to 4 DEG C/min speed, and reaction terminates rear natural cooling,
Obtain agglomerate.The parameters such as the intensity of the pelletizing are as shown in table 2.
Table 2
Magnesia is mixed with the compound binding agent prepared in the present invention magnesia ball is prepared into after ball press pressure ball
Group, the sintered rear compression strength of pelletizing of preparation reach more than 780N/, and compression strength is high, the compound binding agent that pressure ball uses
It is made up of organic binder bond and inorganic binder, after the sintering less residue, obtained pelletizing can be directly used for electric-melting magnesium
The preparation of sand, meet intensity requirement when prepared by fused magnesite, there is wide industrial prospect.
Qinghai Chaerhan salt lakes are the maximum chloride type sodium potassium magnesium salt deposits in China, with the utilization of potassium resource,
The substantial amounts of magnesium chloride of by-product, based on its resources characteristic, rely on magnesia to prepare magnesia technique, extracted using from salt lake bittern
High-purity magnesium oxide, develop practical technique, to expand magnesia preparation research, promote comprehensive utilization of resources it is significant.
The magnesia pelletizing or magnesia pellet strength obtained according to the compound binding agent of the present invention is high, in electric melting process
Do not allow broken, and like that preparation technology is simple, may be directly applied to industrial mass production, avoid caused by powder directly enters stove
The working of a furnace deteriorates and pollution on the environment.
Magnesia pelletizing prepared by binding agent of the present invention can be directly used for preparing fused magnesite.
Claims (11)
- A kind of 1. magnesia pelletizing, it is characterised in thatThe magnesia pelletizing system obtains after magnesium oxide powder addition compound binding agent is well mixed after pressure ball, drying, sintering To finished product magnesia pelletizing, it is characterised in thatThe compound binding agent is by sodium carboxymethylcellulose, polyacrylamide and sodium metasilicate and the compound compoiste adhering of calcium hydroxide Agent, wherein,The magnesia powder powder stock is high-purity magnesium oxide, and its MgO chemical composition is more than 92wt%,Based on the magnesium oxide powder of 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and silicic acid sodium content are as follows：Sodium carboxymethylcellulose：0.1-1.5wt%,Polyacrylamide：0.1-2.0wt%,Sodium metasilicate：0.2-3.0wt%,Calcium hydroxide：0.2-4.0wt%.
- A kind of 2. magnesia pelletizing as claimed in claim 1, it is characterised in thatBased on the magnesium oxide powder of 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and silicic acid sodium content are as follows：Sodium carboxymethylcellulose：0.2-0.6wt%,Polyacrylamide：0.2-0.6wt%,Sodium metasilicate：0.4-0.8wt%,Calcium hydroxide：0.4-0.8wt%.
- A kind of 3. magnesia pelletizing as claimed in claim 1, it is characterised in thatThe compound binding agent also includes cornstarch, humic acid and acrylic resin, the magnesia powder based on 100 parts by weight End, the cornstarch, humic acid and acrylic resin content are as follows：Cornstarch：0.2-3.5wt%,Humic acid：0.2-4.0wt%Acrylic resin：0.2-5.0wt%.
- A kind of 4. magnesia pelletizing as claimed in claim 3, it is characterised in thatThe cornstarch of the compound binding agent, humic acid and acrylic resin content are as follows：Cornstarch：0.3-0.6wt%,Humic acid：0.3-0.8%wt%,Acrylic resin：0.3-0.8wt%.
- A kind of 5. magnesia pelletizing as claimed in claim 1, it is characterised in thatThe compound binding agent also includes syrup, polyvinylpyrrolidone, based on the magnesium oxide powder of 100 parts by weight, the sugar Slurry, polyvinyl pyrrolidone content are as follows：Syrup：0.2-4.0wt%,Polyvinylpyrrolidone：0.2-5.0wt%.
- A kind of 6. magnesia pelletizing as claimed in claim 5, it is characterised in thatThe syrup, polyvinyl pyrrolidone content are as follows：Syrup：0.2-0.8wt%,Polyvinylpyrrolidone：0.2-0.6wt%.
- 7. a kind of preparation method of magnesia pelletizing, magnesia powder powder stock is mixed with compound binding agent, obtains compound, so The compound is obtained into finished pellet after pressure ball, drying, sintering afterwards, it is characterised in thatThe compound binding agent is by sodium carboxymethylcellulose, polyacrylamide and sodium metasilicate and the compound compoiste adhering of calcium hydroxide Agent, the magnesia powder powder stock are high-purity magnesium oxide, and its MgO chemical composition is more than 92wt%,Wherein,Based on the magnesium oxide powder of 100 parts by weight, the sodium carboxymethylcellulose, polyacrylamide and silicic acid sodium content are as follows：Sodium carboxymethylcellulose：0.1-1.5wt%,Polyacrylamide：0.1-2.0wt%,Sodium metasilicate：0.2-3.0wt%,Calcium hydroxide：0.2-4.0wt%.
- A kind of 8. preparation method of magnesia pelletizing as claimed in claim 7, it is characterised in thatThe compound binding agent also includes cornstarch, humic acid and acrylic resin, the magnesia powder based on 100 parts by weight End, the cornstarch, humic acid and acrylic resin content are as follows：Cornstarch：0.2-3.5wt%,Humic acid：0.2-4.0wt%Acrylic resin：0.2-5.0wt%.
- A kind of 9. preparation method of magnesia pelletizing as claimed in claim 7, it is characterised in thatThe compound binding agent also includes syrup, polyvinylpyrrolidone, based on the magnesium oxide powder of 100 parts by weight, the sugar Slurry, polyvinyl pyrrolidone content are as follows：Syrup：0.2-4.0wt%,Polyvinylpyrrolidone：0.2-5.0wt%.
- A kind of 10. preparation method of magnesia pelletizing as claimed in claim 7, it is characterised in that：The briquetting pressure of the pressure ball is 5-30MPa, and described drying temperature is 100-150 DEG C, drying time：5-7 hours.
- A kind of 11. preparation method of magnesia pelletizing as claimed in claim 7, it is characterised in that：The sintering temperature is 1000-1300 DEG C, time 10-30min.
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| CN115806428A (en) * | 2022-11-14 | 2023-03-17 | 攀钢集团研究院有限公司 | Shaping sintering preparation method of magnesium oxide pellet or device |
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| CN101736148A (en) * | 2008-11-21 | 2010-06-16 | 刘贵堂 | Sintering-pelletizing additive, preparation method and application thereof |
| CN101899566A (en) * | 2009-05-27 | 2010-12-01 | 宝山钢铁股份有限公司 | High polymer binder for cold bond pellet and preparation method thereof |
| CN103667692A (en) * | 2014-01-02 | 2014-03-26 | 嘉峪关市园通新型保温材料有限责任公司 | Combined fluorite powder palletizing adhesion agent and application thereof |
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| JPH04260642A (en) * | 1991-02-08 | 1992-09-16 | Kurosaki Refract Co Ltd | Binder for kneading and granulating refractory and preparation of granules with the binder |
| CN1286231A (en) * | 1999-08-30 | 2001-03-07 | 杨庆广 | High-purity magnesite with volume density higher than 3.40 g/cu.cm prepared from magnesite and its preparing process |
| CN101736148A (en) * | 2008-11-21 | 2010-06-16 | 刘贵堂 | Sintering-pelletizing additive, preparation method and application thereof |
| CN101899566A (en) * | 2009-05-27 | 2010-12-01 | 宝山钢铁股份有限公司 | High polymer binder for cold bond pellet and preparation method thereof |
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| CN115806428A (en) * | 2022-11-14 | 2023-03-17 | 攀钢集团研究院有限公司 | Shaping sintering preparation method of magnesium oxide pellet or device |
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