CN102249711A - Novel silicon carbide and boron carbide ceramic inner barrel suspending plate for dry method cement kiln - Google Patents
Novel silicon carbide and boron carbide ceramic inner barrel suspending plate for dry method cement kiln Download PDFInfo
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- CN102249711A CN102249711A CN2011101343359A CN201110134335A CN102249711A CN 102249711 A CN102249711 A CN 102249711A CN 2011101343359 A CN2011101343359 A CN 2011101343359A CN 201110134335 A CN201110134335 A CN 201110134335A CN 102249711 A CN102249711 A CN 102249711A
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- silicon carbide
- inner barrel
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- cement kiln
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Abstract
The invention discloses a novel silicon carbide and boron carbide ceramic inner barrel suspending plate for a dry method cement kiln, which has the advantages of long service life, high temperature resistance, oxidation resistance, high strength at high temperatures, good wear resistance, small influence by acid and alkali atmospheres and the like. Silicon carbide, boron carbide and metallic silicon are used as raw materials, additives are additionally added, the addition quantity of the silicon carbide accounts for 75-95% of the total weight of the raw materials, the addition quantity of the metallic silicon accounts for 1-20% of the total weight of the raw materials, the addition quantity of the boron carbide accounts for 0.1-15% of the total weight of the raw materials, and the addition quantity of the additives accounts for 0.1-10% of the total weight of the raw materials. After being processed by grouting molding or extrusion molding and demoulding drying, the mixture is put in a vacuum high-temperature kiln to be sintered, and a sintered product can be made after sintered.
Description
Technical field
The present invention relates to a kind of new type nonaqueous cement kiln ceramic inner cylinder for preheater link plate, particularly a kind of main component comprises the ceramic inner barrel link plate of silicon carbide, norbide.
Background technology
Preheater is one of nucleus equipment of New Type Dry-process Cement Production process, is bearing multinomial functions such as material heating, gas solid separation, mass transport and part physics, chemical reaction; Wherein the whirlwind inner core is the key part of preheater, if do not establish inner core, then feed separation efficient will reduce by 10%, makes hear rate increase about 20kJ/kg grog, and one therefore 5000t/d dry method line annual and industrial exhaust heat that waste is just marked coal up to the 1000-2000 ton; The more important thing is that line clogging, thermo-efficiency reduction even the mark coal of being wasted that stops production because of no inner core causes will be multiplied.Therefore, preheater inner barrel is very crucial to heat energy utilization rate, the equilbrium running that improves total system.At present, the preheater inner barrel link plate remains based on nichrome high temperature steel, because the aggressiveness of high temperature steel acid and alkali-resistance atmosphere is relatively poor and the non-refractory wearing and tearing, therefore, the work-ing life of high temperature steel inner core link plate is all very short, has only about 10 months to 1 year.Particularly the chromium in the steel alloy contains harmful composition, and environment is polluted, and is international and domestic all in the restriction use.
Summary of the invention
The above-mentioned technical problem that the present invention will solve has provided a kind of ceramic inner barrel link plate that following characteristics are arranged: with the high temperature steel non-refractory, acid-alkali-corrosive-resisting, congenital deficiency such as wear no resistance are not compared, this ceramic inner barrel has long, high temperature resistant, resistance to oxidation of life-span, and the hot strength height, wear resistance is good and be subjected to soda acid atmosphere to influence advantages such as little.
Ceramic inner barrel link plate of the present invention is for solving the problems of the technologies described above, technical scheme of the present invention is as follows: a kind of silicon carbide-carbon boron ceramic inner barrel link plate, former expect be silicon carbide, norbide and Pure Silicon Metal, outer doping, through injection forming or extrusion molding, after the demoulding drying, the vacuum high-temperature klining of packing into becomes, and can obtain burnt product after burning till.
The former proportioning of expecting of the present invention is:
The per-cent that the silicon carbide add-on accounts for the former gross weight of expecting is 75-95%,
The per-cent that the Pure Silicon Metal add-on accounts for the former gross weight of expecting is 1-20%,
The per-cent that the norbide add-on accounts for the former gross weight of expecting is 0.1-15%,
The per-cent that doping add-on in addition accounts for the former gross weight of expecting is 0.1-10%.
Wherein additive comprises toughener, toughner, water reducer, wedding agent respectively; Additive can be organic and inorganic materials, comprise in methylcellulose gum, carboxymethyl cellulose, polyvinyl alcohol, dextrin, lignosulfite, polymer alumina, zirconium oxychloride, Tai-Ace S 150, aluminum phosphate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, sodium polyphosphate, trisodium phosphate, the water glass a kind of, two or more are used in combination.
The molding mode of this invention product is: injection forming or extrusion molding dual mode.Injection forming is to use the raw material with said ratio to be combined together, and adds entry, stirs, and makes slurry, is injected into die for molding with slip casting machine again, carries out drying after the moulding, carries out the demoulding then; Extrusion molding is that the raw material that will choose is combined together, and adds entry, stirs, and makes slurry, spraying drying, carries out extrusion molding in extrusion machine, carries out the demoulding after the drying.After formed product, the demoulding, after the drying, the vacuum high-temperature klining of packing into becomes, and burns till high temperature kiln and is divided into two kinds: vacuum oven vacuum sintering or carbon tube furnace pressureless sintering.Firing temperature rises to 1950 ℃ from normal temperature, carries out 2-3 hour insulation then, and kiln being cooled to normal temperature can come out of the stove product again, can obtain this new type nonaqueous cement kiln with silicon carbide-carbon boron ceramic inner barrel link plate.
Owing to the boron carbide raw material that adds aborning, the microhardness of norbide is 5500-6700kg/mm2, and wear resistance surpasses silicon carbide 50%, surpasses corundum more than 150%, is good anti-abrasive material.The Mohs' hardness of norbide is 9.3, and is the 5th kind of the hardest known material behind silicon carbide, diamond and diamond.Norbide and acid, alkaline solution Fails To Respond have that high chemical potential, neutron absorb, wear-resisting and semi-conductor electroconductibility, and it is to one of the most stable material of acid, all stablize in dense or diluted acid or the alkali aqueous solution at all, so very strong acid-alkali-corrosive-resisting is arranged.Norbide has special stability when some transition metal and carbide coexistence thereof.Norbide is that a kind of the norbide Mohs' hardness is 9.3 than silicon carbide or the also hard solid of wolfram varbide, and the high temperature steel Mohs' hardness has only 5.5.The norbide fusing point: 2350 ℃, 1600 ℃ of high temperature steel fusing points exceed 750 ℃ than high temperature steel.Norbide bending strength 〉=400Mpa, silicon carbide bending strength 〉=285Mpa improves 105Mpa than silicon carbide.High temperature steel proportion 7.8, norbide proportion 2.46, therefore in light weight than high temperature steel, be more conducive to articulating of ceramic inner barrel, and also wear-resisting.The high temperature steel inner core has only about 1 year work-ing life, and silicon carbide-carbon boron inner core of the present invention is more than 5 years.Therefore silicon carbide-carbon boron ceramic inner barrel has extremely strong wear resistance, and high temperature resistant, advantage such as heat impact strength good, the life-span is long.Adopting this silicon carbide-carbon boron stupalith to be used for inner core is up-to-date material, new technology, is better than traditional high temperature steel, and market outlook are wide, reaches more than 10,000,000,000 yuan for enterprise and society create huge economic benefit.
Embodiment
The following stated embodiment describes the present invention in detail, and in these embodiments, unless otherwise indicated, all umbers and per-cent are all calculated by weight.
Embodiment 1
| Material name | Weight percent % |
| Silicon carbide | 89 |
| Pure Silicon Metal | 10 |
| Norbide | 1 |
| Additive | 1 |
Embodiment 2
| Material name | Weight percent % |
| Silicon carbide | 87 |
| Pure Silicon Metal | 11 |
| Norbide | 2 |
| Additive | 2 embodiment 3 |
| Material name | Weight percent % |
| Silicon carbide | 85 |
| Pure Silicon Metal | 12 |
| Norbide | 3 |
| Additive | 3 |
Preparation technology's flow process of embodiment 1,2,3:
The raw material of said ratio is combined together, make slurry, inject mould, carry out moulding, the present invention can carry out moulding with injection forming or extrusion molding dual mode, injection forming is to use the raw material with said ratio to be combined together, and adds entry, stirs, make slurry, be injected in the mould with slip casting machine again, carry out moulding, carry out the demoulding after the drying; Extrusion molding is that the raw material that will choose is combined together, and adds entry, stirs, and makes slurry, spraying drying, carries out extrusion molding again in the extrusion machine, carries out the demoulding after the drying.After formed product, the demoulding, drying, the vacuum high-temperature klining of packing into becomes.Burn till high temperature kiln and be divided into two kinds: vacuum oven vacuum sintering or carbon tube furnace pressureless sintering.Firing temperature rises to 1950 ℃ from normal temperature, carries out 2-3 hour insulation then, and kiln being cooled to normal temperature can come out of the stove product again, can obtain this new type nonaqueous cement kiln with silicon carbide-carbon boron ceramic inner barrel link plate.
Claims (4)
1. a new type nonaqueous cement kiln is with silicon carbide-carbon boron ceramic inner barrel link plate, it is characterized in that: former expect be silicon carbide, norbide and Pure Silicon Metal, outer doping, the per-cent that the silicon carbide add-on accounts for the former gross weight of expecting is 75-95%, the per-cent that the Pure Silicon Metal add-on accounts for the former gross weight of expecting is 1-20%, the per-cent that the norbide add-on accounts for the former gross weight of expecting is 0.1-15%, and the per-cent that the additive add-on accounts for the former gross weight of expecting is 0.1-10%.
2. new type nonaqueous cement kiln according to claim 1 is characterized in that with silicon carbide-carbon boron ceramic inner barrel link plate: additive be in methylcellulose gum, carboxymethyl cellulose, polyvinyl alcohol, dextrin, lignosulfite, polymer alumina, zirconium oxychloride, Tai-Ace S 150, aluminum phosphate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, sodium polyphosphate, trisodium phosphate, the water glass a kind of, two or more are used in combination.
3. new type nonaqueous cement kiln according to claim 1 is with the preparation method of silicon carbide-carbon boron ceramic inner barrel link plate, it is characterized in that: use raw material to be combined together said ratio, add entry, stir, make slurry, be injected into die for molding with slip casting machine again, after formed product, the demoulding is after the drying, the vacuum high-temperature klining of packing into becomes, and burns till high temperature kiln and is divided into two kinds: vacuum oven vacuum sintering or carbon tube furnace pressureless sintering.Firing temperature rises to 1950 ℃ from normal temperature, carries out 2-3 hour insulation then, and kiln being cooled to normal temperature can come out of the stove product again, can obtain this new type nonaqueous cement kiln with silicon carbide-carbon boron ceramic inner barrel link plate.
4. new type nonaqueous cement kiln according to claim 1 is with the preparation method of silicon carbide-carbon boron ceramic inner barrel link plate, it is characterized in that: use raw material to be combined together said ratio, add entry, stir, make slurry, spraying drying, in extrusion machine, carry out extrusion molding, after formed product, the demoulding is after the drying, the vacuum high-temperature klining of packing into becomes, and burns till high temperature kiln and is divided into two kinds: vacuum oven vacuum sintering or carbon tube furnace pressureless sintering.Firing temperature rises to 1950 ℃ from normal temperature, carries out 2-3 hour insulation then, and kiln being cooled to normal temperature can come out of the stove product again, can obtain this new type nonaqueous cement kiln with silicon carbide-carbon boron ceramic inner barrel link plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110134335 CN102249711B (en) | 2011-05-17 | 2011-05-17 | Novel silicon carbide and boron carbide ceramic inner barrel suspending plate for dry method cement kiln |
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| CN 201110134335 CN102249711B (en) | 2011-05-17 | 2011-05-17 | Novel silicon carbide and boron carbide ceramic inner barrel suspending plate for dry method cement kiln |
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| CN102249711A true CN102249711A (en) | 2011-11-23 |
| CN102249711B CN102249711B (en) | 2013-08-07 |
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| CN 201110134335 Expired - Fee Related CN102249711B (en) | 2011-05-17 | 2011-05-17 | Novel silicon carbide and boron carbide ceramic inner barrel suspending plate for dry method cement kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107253862A (en) * | 2017-07-18 | 2017-10-17 | 深圳市千禾盛科技有限公司 | A kind of glass bending mould ceramics and preparation method thereof |
| CN107500771A (en) * | 2017-07-10 | 2017-12-22 | 深圳市千禾盛科技有限公司 | Glass bending mould ceramics and preparation method thereof |
| CN109320219B (en) * | 2018-11-13 | 2021-12-28 | 辽宁中镁高温材料有限公司 | High-performance aluminum-chromium refractory material and manufacturing method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050126A (en) * | 2007-05-24 | 2007-10-10 | 洛阳鹏飞耐火材料有限公司 | Ceramics hanging boards of alumina in use for cement kiln, and preparation method |
| CN101565320A (en) * | 2009-06-10 | 2009-10-28 | 贾剑光 | Reactive sintering carborundum link plate used for preheater inner barrel of cement kiln and preparation method thereof |
-
2011
- 2011-05-17 CN CN 201110134335 patent/CN102249711B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050126A (en) * | 2007-05-24 | 2007-10-10 | 洛阳鹏飞耐火材料有限公司 | Ceramics hanging boards of alumina in use for cement kiln, and preparation method |
| CN101565320A (en) * | 2009-06-10 | 2009-10-28 | 贾剑光 | Reactive sintering carborundum link plate used for preheater inner barrel of cement kiln and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王静: "反应烧结碳化硅基复合材料的研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107500771A (en) * | 2017-07-10 | 2017-12-22 | 深圳市千禾盛科技有限公司 | Glass bending mould ceramics and preparation method thereof |
| CN107253862A (en) * | 2017-07-18 | 2017-10-17 | 深圳市千禾盛科技有限公司 | A kind of glass bending mould ceramics and preparation method thereof |
| CN109320219B (en) * | 2018-11-13 | 2021-12-28 | 辽宁中镁高温材料有限公司 | High-performance aluminum-chromium refractory material and manufacturing method and application thereof |
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| Publication number | Publication date |
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| CN102249711B (en) | 2013-08-07 |
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