CN117550871B - Heat conducting material and preparation method and application thereof - Google Patents
Heat conducting material and preparation method and application thereof Download PDFInfo
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- CN117550871B CN117550871B CN202410049564.8A CN202410049564A CN117550871B CN 117550871 B CN117550871 B CN 117550871B CN 202410049564 A CN202410049564 A CN 202410049564A CN 117550871 B CN117550871 B CN 117550871B
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- heat conducting
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- 239000004020 conductor Substances 0.000 title claims abstract description 104
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 239000000460 chlorine Substances 0.000 claims abstract description 149
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 149
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 148
- 239000000945 filler Substances 0.000 claims abstract description 91
- 239000002250 absorbent Substances 0.000 claims abstract description 90
- 230000002745 absorbent Effects 0.000 claims abstract description 90
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 60
- 239000010439 graphite Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000008367 deionised water Substances 0.000 claims abstract description 48
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 48
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 36
- 239000006096 absorbing agent Substances 0.000 claims abstract description 34
- 229910021383 artificial graphite Inorganic materials 0.000 claims abstract description 25
- 239000000701 coagulant Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims description 72
- 239000005995 Aluminium silicate Substances 0.000 claims description 56
- 235000012211 aluminium silicate Nutrition 0.000 claims description 56
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 56
- 235000019353 potassium silicate Nutrition 0.000 claims description 52
- -1 alkyl naphthalene sulfonate Chemical compound 0.000 claims description 48
- 239000004111 Potassium silicate Substances 0.000 claims description 46
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 46
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 46
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 46
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 46
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 46
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 32
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 30
- 238000004898 kneading Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 23
- 239000000571 coke Substances 0.000 claims description 19
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 17
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 17
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 17
- 229910019142 PO4 Inorganic materials 0.000 claims description 16
- 239000010452 phosphate Substances 0.000 claims description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 14
- 239000013212 metal-organic material Substances 0.000 claims description 12
- 239000004115 Sodium Silicate Substances 0.000 claims description 11
- 238000005054 agglomeration Methods 0.000 claims description 11
- 230000002776 aggregation Effects 0.000 claims description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 238000011068 loading method Methods 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 239000011231 conductive filler Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 238000007580 dry-mixing Methods 0.000 claims description 6
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 4
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 4
- 150000002433 hydrophilic molecules Chemical class 0.000 claims description 4
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 4
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 claims description 4
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 3
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 3
- 235000021317 phosphate Nutrition 0.000 claims description 3
- 239000005909 Kieselgur Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 description 19
- 238000005260 corrosion Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 238000005303 weighing Methods 0.000 description 11
- 238000005507 spraying Methods 0.000 description 9
- 239000004568 cement Substances 0.000 description 8
- 238000006056 electrooxidation reaction Methods 0.000 description 8
- 238000007873 sieving Methods 0.000 description 8
- 239000012798 spherical particle Substances 0.000 description 8
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000004939 coking Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 229920003064 carboxyethyl cellulose Polymers 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- IWOUTIHKEQOMCY-UHFFFAOYSA-N 2-ethyl-3,4,5-triphenylphenol Chemical compound C1(=CC=CC=C1)C=1C(=C(C(=C(C1)O)CC)C1=CC=CC=C1)C1=CC=CC=C1 IWOUTIHKEQOMCY-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
- C10B27/06—Conduit details, e.g. valves
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention belongs to the technical field of heat conducting materials, and discloses a heat conducting material, a preparation method and application thereof, wherein the heat conducting material comprises the following raw materials in parts by weight: 48.9-52.9 parts of coagulant, 5 parts of filler, 38-44 parts of heat conducting filler, 1-3 parts of impregnant, 1 part of regulator, 0.1 part of chlorine absorbent and 5 parts of deionized water; wherein the heat conducting filler is one or two of flake graphite and artificial graphite; the chlorine absorber is used for absorbing chloride ions in the heat-conducting filler; according to the invention, the heat-conducting filler is treated by introducing the chlorine absorbent, so that chloride ions in the heat-conducting filler can be effectively eliminated; secondly, the viscosity of the coagulant is effectively maintained, and the viscosity of the heat conducting material is further improved; meanwhile, as the viscosity of the heat conducting material is improved, the porosity of the internal structure of the heat conducting material is reduced, and the heat conducting coefficient of the heat conducting material is further improved.
Description
Technical Field
The invention belongs to the technical field of heat conducting materials, and particularly relates to a heat conducting material, a preparation method and application thereof.
Background
In the steel, coking and power industries, heat tracing pipes are commonly used for carrying out heat tracing on material conveying pipelines, material reaction equipment and material storage equipment; the heat-conducting daub is used as a heat-conducting energy-saving material, can exert self heat-conducting property in the pipeline and equipment, and has the purposes of saving energy and reducing energy waste.
At present, most of traditional heat-conducting daub in the coking industry has the problems of low heat conductivity coefficient and too high chloride ion content; for example, chinese patent application "a waterproof self-curing inorganic heat-conducting cement" (application number: 201010576094.9); the natural crystalline flake graphite and the alkaline silica sol are adopted as main bodies, and chlorine gas or hydrogen chloride is inevitably used in the purification process of the natural crystalline flake graphite, so that the content of chloride ions in the heat-conducting daub is too high, and the content of the chloride ions is up to 89.364-108.54ppm; the electrochemical corrosion phenomenon in pipelines and equipment is easy to accelerate due to the excessively high content of chloride ions, and pitting, pitting and surface corrosion phenomena of the pipelines or equipment are easy to occur after long-term use, so that the waste heat recovery amount is reduced, water leakage accidents frequently occur, and the normal use of the pipelines and the equipment is seriously influenced.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a heat conduction material, a preparation method and application thereof, and aims to solve the technical problems that the traditional heat conduction cement has low heat conduction coefficient and the chloride ion content is too high.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a heat conducting material, which comprises the following raw materials in parts by weight:
48.9-52.9 parts of coagulant
5 parts of filler
38-44 parts of heat conducting filler
1-3 parts of impregnant
Regulator 1 part
Chlorine absorbent 0.1 part
Deionized water 5 parts
Wherein the heat conducting filler is one or two of flake graphite and artificial graphite; the chlorine absorber is used for absorbing chloride ions in the heat conducting filler.
Further, the coagulant is potassium silicate or sodium silicate.
Further, the filler adopts calcined kaolin or a mixture containing calcined kaolin; wherein the mixture containing calcined kaolin is a mixture of calcined kaolin and silicon dioxide or a mixture of calcined kaolin, diatomite and aluminum oxide.
Further, the impregnant adopts one of a mixture of alkyl naphthalene sulfonate and sodium hexametaphosphate, a mixture of potassium triphenyl ethylphenol polyoxyethylene ether phosphate and sodium hexametaphosphate or sodium hexametaphosphate.
Further, the regulator is one of polyvinyl alcohol, hydroxymethyl cellulose and hydroxyethyl cellulose.
Further, the chlorine absorbent adopts a hydrophilic chlorine absorbent; wherein, the preparation process of the hydrophilic chlorine absorbent comprises the following steps:
active alumina powder is adopted as a carrier, and a metal organic material is loaded on the carrier through a dry-mixing loading process to obtain the hydrophilic compound chlorine absorbent; wherein the metal organic material is sodium ethoxide.
The invention also provides a preparation method of the heat conduction material, which comprises the following steps:
mixing a chlorine absorbent with part of deionized water to prepare a chlorine absorbent solution;
mixing the chlorine absorbent solution with the heat-conducting filler, kneading, stirring, drying and crushing to obtain the heat-conducting filler after chlorine removal;
mixing coagulant, impregnant, regulator and the rest deionized water, stirring uniformly, sequentially adding filler and the dechlorinated heat-conducting filler, and continuing stirring to paste to obtain the heat-conducting material.
Further, in the process of mixing the chlorine absorbent with part of deionized water to prepare the chlorine absorbent solution, the mass ratio of the chlorine absorbent to the deionized water is 1 (40-60).
Further, mixing the chlorine absorbent solution with the heat conducting filler, and kneading and stirring at a speed of 15-20rpm and at a temperature of not higher than 40 ℃; ending the kneading and stirring operation when the phenomenon of hand agglomeration and loosening is caused, discharging and waiting for drying; the granularity of the heat conducting filler after chlorine removal is 200-600 meshes.
The invention also provides application of the heat conducting material in a coke oven riser.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a heat-conducting material, a preparation method and application thereof, wherein a chlorine absorbent is introduced to pretreat a heat-conducting filler to absorb chloride ions in the heat-conducting filler, so that the chloride ions in the heat-conducting filler can be effectively eliminated, corrosion of the heat-conducting material to equipment and pipelines is avoided, and normal use of the equipment and the pipelines is ensured; secondly, the chlorine absorber is used for absorbing chloride ions in the heat conducting filler, so that electrochemical corrosion of the heat conducting material can be reduced to the greatest extent, electronic movement of a primary cell principle caused in the electrochemical corrosion process is weakened, alkaline consumption in the coagulant is further reduced, adhesiveness of the coagulant is effectively maintained, and adhesiveness of the heat conducting material is further improved; in addition, when the heat conducting material is used in the coke oven riser, the electrochemical corrosion phenomenon of the heat conducting material is reduced, so that the surface of the coke oven riser can maintain initial surface tension and smoothness, and the sufficient contact between the heat conducting material and the coke oven riser is ensured, thereby improving the cohesiveness between the heat conducting material and the coke oven riser; secondly, after the heat-conducting filler is treated by the chlorine absorbent, the granularity of the heat-conducting filler is more uniform and concentrated, and meanwhile, the viscosity of the heat-conducting material is improved, so that the porosity of the internal structure of the heat-conducting material is reduced, and the heat conductivity of the heat-conducting material is further improved; after the heat conducting material is used in the coke oven riser, the waste heat recovery efficiency can be effectively improved, and the energy waste is reduced.
Further, the granularity of the heat-conducting filler subjected to chlorine removal is 200-600 meshes, so that the porosity of the internal structure of the heat-conducting material can be effectively reduced, the space structure of the heat-conducting material is more compact, and the heat conductivity of the heat-conducting material is improved.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the following specific embodiments are used for further describing the invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a heat conducting material, which comprises the following raw materials in parts by weight:
48.9-52.9 parts of coagulant
5 parts of filler
38-44 parts of heat conducting filler
1-3 parts of impregnant
Regulator 1 part
Chlorine absorbent 0.1 part
5 parts of deionized water.
In the invention, the coagulant adopts inorganic high-temperature resistant coagulant, such as potassium silicate or sodium silicate; the filler adopts calcined kaolin or a mixture containing calcined kaolin; the mixture containing calcined kaolin is a mixture of calcined kaolin and silicon dioxide or a mixture of calcined kaolin, diatomite and alumina, wherein the mixture of calcined kaolin and silicon dioxide is obtained by mixing commercially available calcined kaolin with commercially available silicon dioxide, and the mixture of calcined kaolin, diatomite and alumina is obtained by mixing commercially available calcined kaolin, commercially available diatomite and commercially available alumina; the heat conducting filler is one or two of flake graphite and artificial graphite, and the mesh number of the heat conducting filler is 200-600 meshes; the impregnant adopts one of a mixture of alkyl naphthalene sulfonate and sodium hexametaphosphate, a mixture of potassium triphenyl ethylphenol polyoxyethylene ether phosphate and sodium hexametaphosphate or sodium hexametaphosphate; the regulator is one of polyvinyl alcohol, hydroxymethyl cellulose and hydroxyethyl cellulose.
In the invention, the chlorine absorbent adopts a hydrophilic chlorine absorbent; the preparation process of the hydrophilic chlorine absorbent comprises the following steps: active alumina powder is adopted as a carrier, and a metal organic material is loaded on the carrier through a dry-mixing loading process to obtain the hydrophilic compound chlorine absorbent; wherein the metal organic material is sodium ethoxide.
The invention also provides a preparation method of the heat conduction material, which comprises the following steps:
and step 1, weighing or measuring a chlorine absorbent, a filler, a heat conducting filler, an impregnant, a regulator, the chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
Step 2, mixing the chlorine absorbent with part of deionized water to prepare a chlorine absorbent solution; wherein the mass ratio of the chlorine absorbent to the deionized water is 1 (40-60).
Step 3, mixing the chlorine absorbent solution with the heat conducting filler, kneading, stirring, drying and crushing to obtain the heat conducting filler after chlorine removal; wherein, the granularity of the heat conducting filler after chlorine removal is 200-600 meshes; in the kneading and stirring process, the kneading and stirring rotating speed is 15-20rpm, and the temperature is not higher than 40 ℃; the criteria for ending the kneading and stirring operation were: the kneading and stirring operation is finished when the phenomenon of agglomeration by hands and loosening by hands occurs.
And step 4, mixing the coagulant, the impregnant, the regulator and the rest deionized water, uniformly stirring, sequentially adding the filler and the dechlorinated heat-conducting filler, and continuously stirring to paste to obtain the heat-conducting material.
When the heat conducting material is applied, the heat conducting material is arranged between the coke oven ascending pipe and the outer heat tracing pipe, so that the space between the coke oven ascending pipe and the outer heat tracing pipe is filled and compacted, and the heat conducting material completely covers the outer heat tracing pipe; preferably, the heat conducting material is arranged with a thickness of 5mm; specifically, the heat conducting material is arranged between the coke oven ascending pipe and the outer heat tracing pipe by adopting a brushing method, a spraying method, a dipping method, a rolling method or a knife coating method, covers the surface of the outer heat tracing pipe, and is dried at normal temperature or at the temperature of 100-120 ℃.
The preparation principle is as follows:
at present, the traditional heat-conducting daub commonly used in coking equipment often has the phenomenon of oxidation caused by intolerance to high temperature at 600 ℃, reduces or even loses the heat transfer function, and can generate the phenomena of pitting, pitting and surface corrosion due to electrochemical corrosion on the surface of the base steel in the long-term use process; analysis of the cause of this found that: the chloride ion content in the traditional heat-conducting cement is too high; specifically, as the purified graphite is adopted as the heat-conducting filler in the traditional heat-conducting cement, and an alkali acid method, a hydrofluoric acid method or a chloridizing roasting method is adopted in the graphite purification process, chloride ions are inevitably introduced, and the electrochemical corrosion phenomenon of the heat-conducting cement can be accelerated due to the increase of the content of the chloride ions, so that a primary cell is formed on the surface of the matrix steel due to the strength of the acid of the adsorbed water film.
When the surface of the matrix steel is strong in acidity due to the adsorption of a water film, hydrogen evolution corrosion is reacted, and as a large amount of chloride ions exist in the traditional heat-conducting cement, the existence of the chloride ions can be combined with the hydrogen ions in the primary battery, the reaction process of the primary battery is accelerated, and the alkalinity is reduced; wherein, the reaction formula of the primary cell is as follows:
anode: fe (Fe) 2+ +2H 2 O=Fe(OH) 2 +2H +
And (3) cathode: 2H (H) + +2e - =H 2
When the acidity of the water film adsorbed on the surface of the base steel is weak, oxygen absorption corrosion can occur, and the reaction formula is as follows:
anode: fe=fe 2+ +2e -
And (3) cathode: o (O) 2 +2H 2 O+4e - =4OH - 。
In the invention, the chlorine absorber is adopted to pretreat the heat-conducting filler to absorb the chloride ions in the heat-conducting filler, and the chloride ions absorbed by the chlorine absorber are resolved in the pretreatment drying process, so as to realize the purpose of completely removing the chloride ions in the heat-conducting material; specifically, the chlorine absorbent is a hydrophilic chlorine absorbent prepared by taking activated alumina powder as a carrier and loading a metal organic material on the carrier through a dry-mixing loading process; the metal organic material in the hydrophilic chlorine absorbent can perform displacement reaction with chloride ions in the heat-conducting filler to form a displacement reaction product, and the metal organic material has stronger activity and poorer stability, so that the chloride ions captured in the displacement reaction product can be released and analyzed in the form of chlorine gas in a pretreatment drying process, and further the effect of effectively capturing, absorbing and removing the chloride ions in the heat-conducting filler is realized; meanwhile, the hydrophilicity of the chlorine absorbent can be improved by loading the metal organic material with the activated alumina powder, so that the capture of the metal organic material on chloride ions is facilitated.
Secondly, the chlorine absorbent is utilized to pretreat the heat-conducting filler, so that the granularity of the heat-conducting filler is more uniform and centralized; meanwhile, the porosity of the internal structure of the heat conducting material can be reduced, so that the viscosity of the heat conducting material is improved, and the heat conducting coefficient of the heat conducting material is further improved; and secondly, potassium silicate or sodium silicate is used as a coagulant, so that the long-term stability of the heat conducting material can be effectively improved, corrosion phenomena caused by pitting, pitting or surface corrosion are eliminated, and the maintenance period of equipment is prolonged.
In the invention, after the heat conducting material is applied to the coke oven riser in the coke oven riser, the chloride ions are eliminated in the preparation process of the heat conducting material, so that the corrosion resistance of the heat conducting material is greatly improved, the stability of equipment and the waste heat recovery efficiency are further improved, and the waste of energy sources is reduced.
Example 1
The embodiment 1 provides a heat conducting material, which comprises the following raw materials in parts by weight:
52.9 parts of potassium silicate
Calcined kaolin 5 parts
38 parts of flake graphite
Alkyl naphthalene sulfonate 2 parts
Polyvinyl alcohol 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 1, the potassium silicate was used as a coagulant, the calcined kaolin was used as a filler, the crystalline flake graphite was used as a heat conductive filler, the alkyl naphthalene sulfonate was used as an impregnating agent together with the sodium hexametaphosphate, the polyvinyl alcohol was used as a regulator, and the hydrophilic chlorine absorber was used as a chlorine absorber.
In the embodiment 1, the potassium silicate is AFK29-40A potassium silicate produced by water glass factory in Buddha; the mesh number of the crystalline flake graphite is 600 meshes; the alkyl naphthalene sulfonate is Morwet EFW type alkyl naphthalene sulfonate manufactured by Achilles, inc.; the preparation process of the hydrophilic chlorine absorbent comprises the following specific steps: and (3) taking active alumina powder as a carrier, and loading sodium ethoxide on the carrier by a dry-mixing loading process to obtain the hydrophilic compound chlorine absorbent.
The preparation process of the heat conducting material in this embodiment 1 specifically includes the following steps:
step 1, weighing or measuring potassium silicate, calcined kaolin, crystalline flake graphite, alkyl naphthalene sulfonate, polyvinyl alcohol, sodium hexametaphosphate, a hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to a mass ratio of 1:50 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite into a kneader, starting the kneader to stir at a rotating speed of 15rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the flake graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomena of agglomeration by hand and loosening by hand are finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 600 mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 600 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the alkyl naphthalene sulfonate, the sodium hexametaphosphate, the polyvinyl alcohol and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin and the dechlorinated heat-conducting filler after uniform stirring, and continuously stirring to paste to obtain the heat-conducting material.
Example 2
The embodiment 2 provides a heat conducting material, which comprises the following raw materials in parts by weight:
48.9 parts of sodium silicate
Calcined kaolin 5 parts
44 parts of flake graphite
Alkyl naphthalene sulfonate 2 parts
Polyvinyl alcohol 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 2, sodium silicate was used as a coagulant, calcined kaolin was used as a filler, crystalline flake graphite was used as a heat conductive filler, alkyl naphthalene sulfonate was used as an impregnating agent together with sodium hexametaphosphate, polyvinyl alcohol was used as a regulator, and a hydrophilic chlorine absorber was used as a chlorine absorber.
In this example 2, the mesh number of the flake graphite is 600 mesh; the alkyl naphthalene sulfonate is Morwet EFW type alkyl naphthalene sulfonate manufactured by Achilles, inc.; the preparation process of the hydrophilic chlorine absorber is the same as that of the hydrophilic chlorine absorber in the above example 1, and will not be described here.
The preparation process of the heat conducting material in this embodiment 2 specifically includes the following steps:
and step 1, weighing or measuring sodium silicate, calcined kaolin, crystalline flake graphite, alkyl naphthalene sulfonate, polyvinyl alcohol, sodium hexametaphosphate, a hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to a mass ratio of 1:40 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite into a kneader, starting the kneader to stir at a rotating speed of 20rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the flake graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomena of agglomeration by hand and loosening by hand are finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 600 mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 600 meshes.
And 4, adding the sodium silicate into a dispersing machine, sequentially adding the alkyl naphthalene sulfonate, the sodium hexametaphosphate, the polyvinyl alcohol and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin and the dechlorinated heat-conducting filler after uniform stirring, and continuously stirring to paste to obtain the heat-conducting material.
Example 3
The embodiment 3 provides a heat conducting material, which comprises the following raw materials in parts by weight:
52.9 parts of potassium silicate
Calcined kaolin 5 parts
38 parts of flake graphite
Alkyl naphthalene sulfonate 2 parts
Polyvinyl alcohol 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
Note that the heat conductive material in this embodiment 3 is substantially the same as the heat conductive material in the above embodiment 1 except that: the mesh number of the crystalline flake graphite described in this example 3 was 200 mesh, and the remaining raw materials were substantially the same.
The preparation process of the heat conducting material in this embodiment 3 specifically includes the following steps:
step 1, weighing or measuring potassium silicate, calcined kaolin, crystalline flake graphite, alkyl naphthalene sulfonate, polyvinyl alcohol, sodium hexametaphosphate, a hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to the mass ratio of 1:60 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite into a kneader, starting the kneader to stir at a rotating speed of 17rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the flake graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomena of agglomeration by hand and loosening by hand are finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 200-mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 200 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the alkyl naphthalene sulfonate, the sodium hexametaphosphate, the polyvinyl alcohol and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin and the dechlorinated heat-conducting filler after uniform stirring, and continuously stirring to paste to obtain the heat-conducting material.
Example 4
The embodiment 4 provides a heat conducting material, which comprises the following raw materials in parts by weight:
52.9 parts of potassium silicate
Calcined kaolin 5 parts
34 parts of flake graphite
4 parts of artificial graphite
2 parts of potassium triphenyl ethylphenol polyoxyethylene ether phosphate
Polyvinyl alcohol 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 4, the potassium silicate was used as a coagulant, the calcined kaolin was used as a filler, the crystalline flake graphite and the artificial graphite were used together as a heat conductive filler, the potassium triphenyl ethylphenol polyoxyethylene ether phosphate and the sodium hexametaphosphate were used together as an impregnating agent, the polyvinyl alcohol was used as a regulator, and the hydrophilic chlorine absorber was used as a chlorine absorber.
In the example 4, the potassium silicate is AFK29-40A potassium silicate produced by water glass factory in Buddha; the mesh number of the crystalline flake graphite is 600 meshes, and the mesh number of the artificial graphite is 200 meshes; the preparation process of the hydrophilic chlorine absorber is the same as that of the hydrophilic chlorine absorber in the above example 1, and will not be described here.
The preparation process of the heat conducting material in this embodiment 4 specifically includes the following steps:
step 1, weighing or measuring potassium silicate, calcined kaolin, crystalline flake graphite, artificial graphite, potassium triphenyl ethylphenol polyoxyethylene ether phosphate, polyvinyl alcohol, sodium hexametaphosphate, hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to a mass ratio of 1:50 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite and the artificial graphite into a kneader, starting the kneader to stir at a rotating speed of 18rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the mixture of the flake graphite and the artificial graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomenon of agglomeration by hand and loosening by hand is finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 200-mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 200 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the potassium triphenyl ethylphenol polyoxyethylene ether phosphate, the sodium hexametaphosphate, the polyvinyl alcohol and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin and the dechlorinated heat-conducting filler after uniform stirring, and continuously stirring to paste to obtain the heat-conducting material.
Example 5
The embodiment 5 provides a heat-conducting filler, which comprises the following raw materials in parts by weight:
52.9 parts of potassium silicate
Calcined kaolin 5 parts
38 parts of artificial graphite
Alkyl naphthalene sulfonate 2 parts
Polyvinyl alcohol 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 5, the potassium silicate was used as a coagulant, the calcined kaolin was used as a filler, the artificial graphite was used as a heat conductive filler, the alkyl naphthalene sulfonate was used as an impregnating agent together with the sodium hexametaphosphate, the polyvinyl alcohol was used as a regulator, and the hydrophilic chlorine absorber was used as a chlorine absorber.
In the embodiment 5, the potassium silicate is AFK29-40A potassium silicate produced by water glass factory in Buddha; the mesh number of the artificial graphite is 200 mesh; the alkyl naphthalene sulfonate is Morwet EFW type alkyl naphthalene sulfonate manufactured by Achilles, inc.; the preparation process of the hydrophilic chlorine absorber is the same as that of the hydrophilic chlorine absorber in the above example 1, and will not be described here.
The preparation process of the heat conducting material in this embodiment 5 specifically includes the following steps:
and step 1, weighing or measuring potassium silicate, calcined kaolin, artificial graphite, alkyl naphthalene sulfonate, polyvinyl alcohol, sodium hexametaphosphate, a hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to the mass ratio of 1:60 to prepare a chlorine absorbent solution.
Step 3, adding the artificial graphite into a kneader, starting the kneader to stir at a rotating speed of 20rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the artificial graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomenon of agglomeration by hand and loosening by hand is finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 200-mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 200 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the alkyl naphthalene sulfonate, the sodium hexametaphosphate, the polyvinyl alcohol and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin and the dechlorinated heat-conducting filler after uniform stirring, and continuously stirring to paste to obtain the heat-conducting material.
Example 6
The embodiment 6 provides a heat-conducting filler, which comprises the following raw materials in parts by weight:
52.9 parts of potassium silicate
Calcined kaolin 3 parts
Diatomite 1 part
Alumina 1 part
38 parts of flake graphite
Polyvinyl alcohol 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 6, the potassium silicate was used as a coagulant, the calcined kaolin, diatomaceous earth, and alumina were used together as a filler, the crystalline flake graphite was used as a heat conductive filler, sodium hexametaphosphate was used as an impregnant, polyvinyl alcohol was used as a regulator, and the hydrophilic chlorine absorber was used as a chlorine absorber.
In the embodiment 6, the potassium silicate is AFK29-40A potassium silicate produced by water glass factory in Buddha; the mesh number of the crystalline flake graphite is 600 meshes; the preparation process of the hydrophilic chlorine absorber is the same as that of the hydrophilic chlorine absorber in the above example 1, and will not be described here.
The preparation process of the heat conducting material in this embodiment 6 specifically includes the following steps:
step 1, weighing or measuring potassium silicate, calcined kaolin, diatomite, alumina, crystalline flake graphite, polyvinyl alcohol, sodium hexametaphosphate, a hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to a mass ratio of 1:40 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite into a kneader, starting the kneader to stir at a rotating speed of 20rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the flake graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomena of agglomeration by hand and loosening by hand are finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 600 mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 600 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the sodium hexametaphosphate, the polyvinyl alcohol and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin, the diatomite, the aluminum oxide and the dechlorinated heat-conducting filler after stirring uniformly, and continuously stirring to paste to obtain the heat-conducting material.
Example 7
The embodiment 7 provides a heat conducting material, which comprises the following raw materials in parts by weight:
52.9 parts of potassium silicate
Calcined kaolin 5 parts
38 parts of flake graphite
2 parts of potassium triphenyl ethylphenol polyoxyethylene ether phosphate
Carboxymethyl cellulose 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 7, the potassium silicate was used as a coagulant, the calcined kaolin was used as a filler, the crystalline flake graphite was used as a heat conductive filler, the potassium triphenyl ethylphenol polyoxyethylene ether phosphate was used as an impregnating agent together with the sodium hexametaphosphate, the carboxymethyl cellulose was used as a regulator, and the hydrophilic chlorine absorbent was used as a chlorine absorbent.
In the embodiment 7, the potassium silicate is AFK29-40A potassium silicate produced by water glass factory in Buddha; the mesh number of the crystalline flake graphite is 600 meshes; the preparation process of the hydrophilic chlorine absorber is the same as that of the hydrophilic chlorine absorber in the above example 1, and will not be described here.
The preparation process of the heat conducting material in this embodiment 7 specifically includes the following steps:
step 1, weighing or measuring potassium silicate, calcined kaolin, crystalline flake graphite, triphenyl ethylphenol polyoxyethylene ether potassium phosphate, carboxymethyl cellulose, sodium hexametaphosphate, hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to a mass ratio of 1:50 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite into a kneader, starting the kneader to stir at a rotating speed of 15rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the flake graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomena of agglomeration by hand and loosening by hand are finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 600 mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 600 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the potassium triphenyl ethylphenol polyoxyethylene ether phosphate, the sodium hexametaphosphate, the carboxymethyl cellulose and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin and the dechlorinated heat-conducting filler after uniform stirring, and continuously stirring to paste to obtain the heat-conducting material.
Example 8
The embodiment 8 provides a heat conducting material, which comprises the following raw materials in parts by weight:
52.8 parts of potassium silicate
Calcined kaolin 4 parts
1 part of silicon dioxide
38 parts of flake graphite
Alkyl naphthalene sulfonate 2 parts
Hydroxyethyl cellulose 1 part
Sodium hexametaphosphate 1 part
Hydrophilic chlorine absorbent 0.1 part
Deionized water 5 parts
In this example 8, the potassium silicate was used as a coagulant, the calcined kaolin and the silica were used together as a filler, the crystalline flake graphite was used as a heat conductive filler, the alkyl naphthalene sulfonate and the sodium hexametaphosphate were used together as an impregnating agent, the carboxyethyl cellulose was used as a regulator, and the hydrophilic chlorine absorber was used as a chlorine absorber.
In the example 8, the potassium silicate is AFK29-40A potassium silicate produced by water glass factory in Buddha; the mesh number of the crystalline flake graphite is 600 meshes; the alkyl naphthalene sulfonate is Morwet EFW type alkyl naphthalene sulfonate manufactured by Achilles, inc.; the preparation process of the hydrophilic chlorine absorber is the same as that of the hydrophilic chlorine absorber in the above example 1, and will not be described here.
The preparation process of the heat conducting material in this embodiment 8 specifically includes the following steps:
step 1, weighing or measuring potassium silicate, calcined kaolin, silicon dioxide, crystalline flake graphite, alkyl naphthalene sulfonate, carboxyethyl cellulose, sodium hexametaphosphate, a hydrophilic chlorine absorbent and deionized water according to the weight parts of the pre-designed raw materials.
And 2, mixing the hydrophilic chlorine absorbent with deionized water according to a mass ratio of 1:50 to prepare a chlorine absorbent solution.
Step 3, adding the flake graphite into a kneader, starting the kneader to stir at a rotating speed of 20rpm, and controlling the temperature to be not higher than 40 ℃; in the kneading and stirring process, spraying the chlorine absorbent solution into the flake graphite at a feed inlet of a kneader, and continuously kneading and stirring until the phenomena of agglomeration by hand and loosening by hand are finished; after discharging and drying, crushing by an ultrafine crusher or a fluidized bed collision type jet mill, and sieving by a 600 mesh sieve to obtain spherical particles, thus obtaining the heat-conducting filler after chlorine removal; wherein the mesh number of the heat conducting filler after chlorine removal is 600 meshes.
And 4, adding the potassium silicate into a dispersing machine, sequentially adding the alkyl naphthalene sulfonate, the sodium hexametaphosphate, the carboxyethyl cellulose and the rest deionized water, stirring and mixing, sequentially adding the calcined kaolin, the silicon dioxide and the dechlorinated heat conduction filler after uniform stirring, and continuously stirring to paste to obtain the heat conduction material.
Comparative example 1:
comparative example 1 provides a heat conductive material, which comprises the following components in parts by weight:
41.1 parts of sodium silicate
Kaolin 5 parts
20 parts of graphite
30 parts of artificial graphite
0.9 part of sodium triphenyl ethylphenol polyoxyethylene ether phosphate
Polyvinyl alcohol 2 parts
Sodium hexametaphosphate 1 part
The preparation process of the heat conductive material described in comparative example 1 is specifically as follows:
weighing or measuring sodium silicate, kaolin, graphite, artificial graphite, sodium triphenyl ethylphenol polyoxyethylene ether phosphate, polyvinyl alcohol and sodium hexametaphosphate according to the weight parts of the pre-designed raw materials; wherein the mesh number of the graphite is 800 mesh.
Adding the sodium silicate into a dispersing machine, and then sequentially adding the sodium triphenyl ethylphenol polyoxyethylene ether phosphate, the sodium hexametaphosphate and the polyvinyl alcohol to stir and mix; and after stirring uniformly, sequentially adding the kaolin, the graphite and the artificial graphite, and continuing stirring uniformly until paste is discharged to obtain the heat conducting material.
Comparative example 2:
the comparative example 2 provides a heat conducting material, which comprises the following raw materials in parts by weight:
41.1 parts of potassium silicate
Kaolin 5 parts
20 parts of graphite
30 parts of artificial graphite
0.9 part of sodium triphenyl ethylphenol polyoxyethylene ether phosphate
Polyvinyl alcohol 2 parts
Sodium hexametaphosphate 1 part
The preparation process of the heat conductive material described in comparative example 2 is specifically as follows:
weighing or measuring potassium silicate, kaolin, graphite, artificial graphite, sodium triphenyl ethylphenol polyoxyethylene ether phosphate, polyvinyl alcohol and sodium hexametaphosphate according to the weight parts of the pre-designed raw materials; wherein the mesh number of the graphite is 800 mesh.
Adding the potassium silicate into a dispersing machine, and then sequentially adding the sodium triphenyl ethylphenol polyoxyethylene ether phosphate, the sodium hexametaphosphate and the polyvinyl alcohol to stir and mix; and after stirring uniformly, sequentially adding the kaolin, the graphite and the artificial graphite, and continuing stirring uniformly until paste is discharged to obtain the heat conducting material.
And (3) test detection:
the heat conductive materials prepared in examples 1 to 8 and comparative examples 1 to 2 were examined for heat conductivity, chloride ion content and adhesive strength; the heat conductivity coefficient of the heat conducting material is detected by using a high-precision heat conductivity coefficient tester; specifically, the thermal conductivity, chloride ion content and bonding strength of the thermal conductive material were measured as shown in table 1 below.
Table 1 table of results of measurement of thermal conductivity, chloride ion content and bond strength of thermally conductive material
According to the design and use requirements of equipment and rising pipelines in the coke oven coking industry, in order to achieve better energy conservation, waste heat recovery and energy utilization rate increase, the heat conductivity coefficient of the heat conducting material is generally required to be as close as possible to the heat conductivity requirement of the rising pipe in the coking industry, namely, the heat conductivity coefficient of the heat conducting material is required to be close to 16.5-17.5 w/(m.K), so that heat conduction and recovery can be improved.
As can be seen from the above Table 1, the heat conducting materials prepared in examples 1-8 of the present invention all approach the heat conducting requirements of the riser in the coking industry, and can be significantly different from the low heat conductivity coefficient of the conventional cement in the market; the conventional industry, where comparative examples 1-2 were essentially normal, used a process for preparing a thermally conductive cement having a significantly lower thermal conductivity than the thermally conductive materials prepared in examples 1-8.
Secondly, the chloride ion content of the heat conducting material prepared in the comparative examples 1-2 is very high, which will seriously affect the service life of the riser, and the probability of pitting, pitting and surface corrosion is increased, so that the risk of water leakage of the riser is increased, and a certain damage is caused to the coke oven during serious conditions; while the chloride ion content of the heat conductive materials prepared in examples 1-8 was maintained at substantially 0.4216-0.82146ppm, the chloride ion content of the heat conductive materials was greatly reduced as compared to that of comparative examples 1-2.
Secondly, the bonding strength of the heat conducting material prepared in the embodiment 1-8 is maintained at 5.19-5.94MPa, and compared with the bonding strength of the heat conducting material prepared in the comparative embodiment 1-2, the bonding strength is greatly improved; the reason for this is that: because the alkalinity of the coagulant is closely related to the content of chloride ions, the hydrophilic chlorine absorbent is utilized to pretreat the heat-conducting filler in examples 1-8 so as to eliminate chloride ions in the heat-conducting filler, and the electron flow in the heat-conducting material due to the principle of a primary cell is weakened, so that the bonding strength of the heat-conducting material is obviously higher than that of the heat-conducting material prepared in comparative examples 1-2.
Therefore, the heat conducting materials prepared in the above embodiments 1 to 8 can avoid corrosion to equipment and pipelines, and ensure normal use of the equipment and the pipelines; meanwhile, the electrochemical corrosion phenomenon of the heat conducting material can be reduced to the greatest extent, the electronic movement of a primary cell principle caused in the electrochemical corrosion process is weakened, the alkaline consumption in the coagulant is further reduced, the viscosity of the coagulant is effectively maintained, and the viscosity of the heat conducting material is further improved; in addition, the sufficient contact between the heat conduction material and the coke oven riser pipe can be ensured, so that the cohesiveness between the heat conduction material and the coke oven riser pipe is improved; in conclusion, the heat conducting material provided by the invention has great significance in preventing corrosion and guaranteeing heat transfer.
In the invention, the hydrophilic chlorine absorbent is utilized to pretreat the heat-conducting filler so as to eliminate chloride ions in the heat-conducting filler, and the heat-conducting coefficient of the heat-conducting material prepared by utilizing the heat-conducting filler after chlorine removal is improved to a certain extent; meanwhile, after the content of most chlorine ions is removed, the corrosion resistance of the heat conducting material is greatly improved, the stability of equipment and pipelines is improved, the waste heat recovery efficiency is improved, and the energy waste is reduced.
According to the heat conduction material, the preparation method and the application thereof, disclosed by the invention, the chlorine absorbent is adopted to pretreat the flake graphite or the artificial graphite, so that the chloride ion residues contained in the flake graphite and the artificial graphite in the purification process are effectively eliminated, and the corrosion resistance of the heat conduction material is improved; the chlorine absorbent is a hydrophilic chlorine absorbent, and the hydrophilic chlorine absorbent is prepared by taking active alumina powder as a carrier and loading a metal organic material on the carrier through a dry-mixing loading process; the chloride ion content in the pretreated flake graphite or artificial graphite is greatly reduced, so that the cohesiveness and the heat conductivity coefficient of the heat conducting material are effectively improved; in an accelerated corrosion aging experiment of the coke oven riser pipe using the heat conducting material, the corrosion resistance is greatly improved, the normal use of the coke oven riser pipe can be effectively ensured, and the coke oven riser pipe basically does not have the water leakage phenomenon caused by pitting corrosion, surface corrosion and hole corrosion after the accelerated corrosion aging experiment.
The above embodiment is only one of the implementation manners capable of implementing the technical solution of the present invention, and the scope of the claimed invention is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily recognized by those skilled in the art within the technical scope of the present invention.
Claims (6)
1. The heat conducting material is characterized by comprising the following raw materials in parts by weight:
48.9-52.9 parts of coagulant
5 parts of filler
38-44 parts of heat conducting filler
1-3 parts of impregnant
Regulator 1 part
Chlorine absorbent 0.1 part
Deionized water 5 parts
Wherein the heat conducting filler is one or two of flake graphite and artificial graphite; the chlorine absorber is used for absorbing chloride ions in the heat-conducting filler; the chlorine absorbent adopts a hydrophilic chlorine absorbent; wherein, the preparation process of the hydrophilic chlorine absorbent comprises the following steps:
active alumina powder is adopted as a carrier, and a metal organic material is loaded on the carrier through a dry-mixing loading process to obtain the hydrophilic compound chlorine absorbent; wherein the metal organic material is sodium ethoxide;
the coagulant adopts potassium silicate or sodium silicate;
the filler adopts calcined kaolin or a mixture containing calcined kaolin;
the impregnant adopts one of a mixture of alkyl naphthalene sulfonate and sodium hexametaphosphate, a mixture of potassium triphenyl ethylphenol polyoxyethylene ether phosphate and sodium hexametaphosphate or sodium hexametaphosphate;
the regulator is one of polyvinyl alcohol, hydroxymethyl cellulose and hydroxyethyl cellulose.
2. A thermally conductive material according to claim 1, wherein the mixture comprising calcined kaolin is a mixture of calcined kaolin and silica or a mixture of calcined kaolin, diatomaceous earth and alumina.
3. A method of preparing a thermally conductive material as claimed in any one of claims 1 to 2, comprising the steps of:
mixing a chlorine absorbent with part of deionized water to prepare a chlorine absorbent solution;
mixing the chlorine absorbent solution with the heat-conducting filler, kneading, stirring, drying and crushing to obtain the heat-conducting filler after chlorine removal;
mixing coagulant, impregnant, regulator and the rest deionized water, stirring uniformly, sequentially adding filler and the dechlorinated heat-conducting filler, and continuing stirring to paste to obtain the heat-conducting material.
4. The method of claim 3, wherein the mass ratio of chlorine absorber to deionized water is 1 (40-60) during the process of mixing chlorine absorber with a portion of deionized water to prepare the chlorine absorber solution.
5. The method for producing a heat conductive material according to claim 3, wherein the chlorine absorber solution is mixed with the heat conductive filler, and the kneading stirring speed is 15 to 20rpm and the temperature is not higher than 40 ℃ during the kneading stirring; ending the kneading and stirring operation when the phenomenon of hand agglomeration and loosening is caused, discharging and waiting for drying; the granularity of the heat conducting filler after chlorine removal is 200-600 meshes.
6. Use of a thermally conductive material as claimed in any of claims 1-2, characterized in that the thermally conductive material is used in a coke oven riser.
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| JPS63281964A (en) * | 1987-05-01 | 1988-11-18 | Nissan Maruzen Poriechiren Kk | Oxygen absorbable resin composition containing hydrophylic filler |
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| CN110668731A (en) * | 2019-11-14 | 2020-01-10 | 广西云燕特种水泥建材有限公司 | Additive for ocean engineering concrete and preparation method thereof |
| CN115386197A (en) * | 2022-10-14 | 2022-11-25 | 山东海科创新研究院有限公司 | O-cresol formaldehyde epoxy resin and preparation process thereof |
| CN117304884A (en) * | 2023-08-31 | 2023-12-29 | 陕西驭腾能源环保科技股份有限公司 | Heat-conducting energy-saving material and preparation method and application thereof |
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| JPS63281964A (en) * | 1987-05-01 | 1988-11-18 | Nissan Maruzen Poriechiren Kk | Oxygen absorbable resin composition containing hydrophylic filler |
| CN110498811A (en) * | 2019-09-19 | 2019-11-26 | 苏州金宏气体股份有限公司 | A kind of method that depth removes chlorine in ethyl orthosilicate |
| CN110668731A (en) * | 2019-11-14 | 2020-01-10 | 广西云燕特种水泥建材有限公司 | Additive for ocean engineering concrete and preparation method thereof |
| CN115386197A (en) * | 2022-10-14 | 2022-11-25 | 山东海科创新研究院有限公司 | O-cresol formaldehyde epoxy resin and preparation process thereof |
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