CN104671801A - Corundum wearing-resistant plastic refractory and preparation method thereof - Google Patents
Corundum wearing-resistant plastic refractory and preparation method thereof Download PDFInfo
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Abstract
The invention provides a corundum wearing-resistant plastic refractory. The corundum wearing-resistant plastic refractory comprises corundum, chromium corundum, zirconite, alumina micro powder, zirconium powder, lanthanum and lanthanum group metal oxide micro powder, and 0.01-0.1% of yttrium powder. The invention further claims a preparation method of the corundum wearing-resistant plastic refractory at the same time. The preparation method comprises the steps of fine milling, pre-mixing, mixing, drying, sorting, checking, packaging and storing. Through adding zirconium powder, lanthanum and lanthanum group metal oxide micro powder, and yttrium powder, the high-temperature bonding property of the plastic is improved, and therefore the slag resistance, the thermal stability and the service life of the product are improved.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly relate to a kind of corundum abrasion-proof fire-resistant moldable refractory and preparation method thereof.
Background technology
Refractory materials refers to that refractoriness is not less than a class ceramic of 1580 DEG C.Refractory materials is widely used in the industrial circles such as metallurgy, chemical industry, oil, machinofacture, silicate, power, and in metallurgical industry, consumption is maximum, accounts for 50% ~ 60% of ultimate production.Various process furnace in Iron And Steel Industry, soaking pit, annealing furnace, sintering oven, and the lining body on electric furnace top can not use general sizing refractory materials, special plastic refractory can only be used, plastic refractory is with refractory aggregate and powder, raw clay and chemically composited dose and admixture, through prepare mixing, be squeezed into adobe shape, and after package storage certain hour, still there is good plasticity-, a kind of refractory materials of available ramming method construction.Abrasion-proof fire-resistant moldable refractory is that the rigid high-strength refractory of fire of a series of wear resisting property excellence is moldable, intensity is high, wear resisting property is excellent, good thermal shock stability, workability and use properties excellent, be easy to random molding, be particularly suitable for the construction at special wall or position and quick, convenient, effectively to implement stove maintenance etc., existing plastic refractory on market, because bonding agent high temperature strength is inadequate, general work temperature just sharply declines higher than 1000 DEG C of hot strengths, does not have good high-temperature stability.
Chinese patent CN103833397A discloses a kind of plastic refractory and uses thereof, raw material comprises silicon carbide, aluminum oxide powder, silicon powder, dispersion agent, setting accelerator and bonding agent, have good workability, setting rate is moderate, but because bond strength is inadequate, hot strength is general, and heat-resistant knocking stability is general.Chinese patent CN101591181 discloses a kind of preparation method of single-component phosphate-bonded wear-resistant fire-resistant plastic materials, take corundum as main raw material, with aluminum oxide powder, lapis amiridis, silicon ash and boric acid for matrix, with solid phosphoric acid aluminium for bonding agent, adopt aluminous cement to cook accelerator for hardening, production technique is simple, intensity height long preservative period, but equally because bond strength is inadequate, hot strength is general, and heat-resistant knocking stability is general.It is moldable that Chinese patent CN102030550A discloses a kind of corundum-mullite matter high-strength wearable containing homogeneous material, raw material is made up of high alumina homogeneous material, alumina powder, fine silica powder, clay, phosphoric acid, phosphate dihydrogen aluminum solution and pure calcium aluminate cement etc., have good workability, intensity is high, wear resistance is good, but equally because bond strength is inadequate, poor high temperature stability.Chinese patent CN103435362B discloses a kind of floating plug plastic refractory and preparation method thereof, comprise drift pearl, kyanite, clay, Tai-Ace S 150, ethylene glycol, Walocel MT 20.000PV and explosion-proof fiber, can have high strength at middle low temperature, and at high temperature lose intensity, but wide usage is poor, cost is high.
Summary of the invention
In order to solve plastic refractory poor high temperature stability, the problem worn no resistance, we have proposed a kind of corundum abrasion-proof fire-resistant moldable refractory and preparation method thereof, adopt the present invention effectively can improve high-temperature stability, high temperature abrasion resistance and other resistances to elevated temperatures of plastic refractory.
The present invention is achieved by the following technical solutions:
For achieving the above object, the invention provides a kind of metal fine powder plastic refractory, be made up of the raw material of following mass percent: corundum: 65-85%; Chromium corundum: 10-20%; Zircon: 5-10%; Alumina powder: 1-5%; Zirconium powder: 0.1-1%; Lanthanum and lanthanide metal oxide micro mist: 0.01-0.1%; Yttrium powder: 0.01-0.1%; Dispersion agent: 0.5-3%; Bonding agent: 0.5-3%.Corundum has the performances such as high temperature resistant, corrosion-resistant, high strength, there is the feature that hardness is large, wear resistance good, intensity is high, but because its volume is larger, corundum cannot be directly used in plastic refractory, by fine grinding disintegrating apparatus, corundum is finely ground into the particle being less than 1mm, substantially increase the operability of corundum in moldable, simultaneously corundum fine powder can with other micro mist actings in conjunction, make the moldable finer and close of composition, wear resistance and corrosion resistance can also be improved.Chromium corundum intensity is high, and grinding performance is good, and grinding accuracy is high, and shape-holding property is good, mixes after fine grinding with micro mist shape with other micro mists, can greatly improve moldable wear resistance.As raw material after zircon fine grinding, moldable thermal shock resistance and resistance to flaking can be improved.Alumina powder and zirconium powder, in the mode of displaing microparticle as raw material, improve material plasticity-, and making moldablely has higher normal temperature strength and excellent line change performance.The matrix material be combined into of zirconium powder, lanthanum and lanthanide metal oxide micro mist and yttrium powder is high temperature resistant, stable performance under high temperature, and under normal temperature, high temperature, cohesive strength is high, and linear expansivity is high, and antioxygen, sulphur gaseous corrosion are strong, and thermal shock coefficient is good.
Preferably, the granularity of above-mentioned raw materials is as follows: corundum: 8-1mm; Chromium corundum: 8-1mm; Zircon: 8-1mm; Alumina powder: < 0.088mm; Zirconium powder: d
50=5 μm; Lanthanum and lanthanide metal oxide micro mist: d
50=5 μm; Yttrium powder: d
50=5 μm.The metal oxide of fine particle size has multiple crystalline structure, and activity is very high, and the plasticity-of refractory materials can be made after adding to promote 30-40%.
Preferably, above-mentioned corundum purity is not less than 97%, and chromium corundum purity is not less than 98%, and zircon purity is not less than 98%, and alumina powder purity is not less than 99%, and zirconium powder, lanthanum and lanthanide metal oxide micro mist and yttrium powder purity are not less than 99.9%.The use of high pure raw material, greatly reduce the introducing of silicon-dioxide, decrease magnesium oxide in silicon-dioxide and material and at high temperature generate eutectic, react the possibility generating eutectic with aluminum oxide in molten steel, slag and calcium oxide in effective control use procedure, ensure that good hot strength and refractoriness under load, enhance material corrosion resistance, improve the life-span.
Preferably, above-mentioned dispersion agent is at least one in poly-phosphate and/or polyacrylate.The chemical property of poly-phosphate mainly contains following four: 1, hydrolytic action; 2, complexing action; 3, katalysis; 4, peptization.Poly-phosphate can react with polyvalent cation, makes the passivation widely of these examples, can be adsorbed in the surface of other materials simultaneously, form a kind of adsorption film, the physicochemical property of material surface are changed, thus plays good dispersion effect.
Preferably, above-mentioned bonding agent is by aluminium dihydrogen phosphate and sodium lignosulfonate solution composition, and its weight ratio is: 1:1 ~ 3.Aluminium dihydrogen phosphate at normal temperatures with refractory aggregate, within after the mixing such as stiffening agent constant temperature 4-24 hour between 90-110 DEG C, form high-adhesive-strength, after 350-500 DEG C dries, just there is high resistance folding, resistance to compression, hydration resistance, also do not feel like jelly even if soak or boil in water.And time more than 500 DEG C, inorganic metal micro mist just starts the effect playing bonding agent, aluminium dihydrogen phosphate then plays the effect of secondary combined.This kind of organic plasticizers molecule of sodium lignosulfonate is inserted between particle, Preparation of Fine Powders, weaken the stress between agglomerating particles, add the movability of Preparation of Fine Powders, reduce degree of aggregation between Preparation of Fine Powders, thus the plasticity of particle, Preparation of Fine Powders is increased, improve the plasticity of material, ensure that the compact density of material, improve the shaping qualification rate of product work in-process.Sodium lignosulfonate has good diffusion, and its aqueous solution is brown to black, has colloid property, and the viscosity of solution raises with the increase of concentration.In large gauge Wall or floor tile and refractory brick manufacturing processed, blank raw material particulate secure bond can be made, dry body strength can be made to improve more than 20%-60%.
The present invention provides a kind of preparation method of corundum abrasion-proof fire-resistant moldable refractory simultaneously, and step is as follows:
(1) fine grinding: corundum, chromium corundum and zircon are sent into respectively and pulverizes in atomizer mill, be crushed to particle diameter and be less than 1mm;
(2) premix: corundum, chromium corundum and the zircon after fine grinding in step (1) and alumina powder are sent into premix 5-10 minute in sand mill in proportion;
(3) batch mixing: dispersion agent is added in the raw material of premix in step (2), mix 10-30 minute in sand mill; Add zirconium powder, lanthanum and lanthanide metal oxide micro mist and yttrium powder, in sand mill, mix 10-30 minute; Add bonding agent, mixing 10-30 minute, makes pug;
(4) dry: by pug seasoning 24h in step (3), to moisture not higher than 0.05%;
(5) choose, inspection, packaging warehouse-in.
Compared with prior art, beneficial effect of the present invention is: improve product slag resistance, thermostability, improves work-ing life, Simplified flowsheet.
Embodiment
Below in conjunction with embodiment, further illustrate content of the present invention.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation make the present invention or change all fall into scope; And the method in following embodiment, if no special instructions, be the ordinary method of this area.
Embodiment 1:
A kind of corundum abrasion-proof fire-resistant moldable refractory, is made up of the raw material of following mass percent:
Corundum: 70.48%; Chromium corundum: 15%; Zircon: 8%; Alumina powder: 2%; Zirconium powder: 0.5%; Lanthanum and lanthanide metal oxide micro mist: 0.01%; Yttrium powder: 0.01%; Dispersion agent: 2%; Bonding agent: 2%.Production stage is as follows:
(1) fine grinding: corundum, chromium corundum and zircon are sent into respectively and pulverizes in atomizer mill, be crushed to particle diameter and be less than 1mm;
(2) premix: corundum, chromium corundum and the zircon after fine grinding in step (1) and alumina powder to be sent in proportion in sand mill premix 8 minutes;
(3) batch mixing: dispersion agent is added in the raw material of premix in step (2), mix 20 minutes in sand mill; Add zirconium powder, lanthanum and lanthanide metal oxide micro mist and yttrium powder, in sand mill, mix 20 minutes; Add bonding agent, mix 20 minutes, make pug;
(4) dry: by pug seasoning 24h in step (3), to moisture not higher than 0.05%;
(5) choose, inspection, packaging warehouse-in.Random sampling ten parts, detect each performance, result is as shown in table 1.
Embodiment 2:
A kind of corundum abrasion-proof fire-resistant moldable refractory, is made up of the raw material of following mass percent:
Corundum: 70.4%; Chromium corundum: 15%; Zircon: 8%; Alumina powder: 2%; Zirconium powder: 0.5%; Lanthanum and lanthanide metal oxide micro mist: 0.05%; Yttrium powder: 0.05%; Dispersion agent: 2%; Bonding agent: 2%.
Production stage is substantially the same manner as Example 1.After completing, high-temperature behavior test is carried out in random sampling 10 parts, and result is as shown in table 1.
Embodiment 3:
A kind of corundum abrasion-proof fire-resistant moldable refractory, is made up of the raw material of following mass percent:
Corundum: 70.3%; Chromium corundum: 15%; Zircon: 8%; Alumina powder: 2%; Zirconium powder: 0.5%; Lanthanum and lanthanide metal oxide micro mist: 0.1%; Yttrium powder: 0.1%; Dispersion agent: 2%; Bonding agent: 2%.
Production stage is substantially the same manner as Example 1.After completing, high-temperature behavior test is carried out in random sampling 10 parts, and result is as shown in table 1.
Comparative example:
Commercial take aluminum oxide as the plastic refractory of main component, and high-temperature behavior test is carried out in random sampling 10 parts.
Examination criteria
By alumina content in GB/T6900 Indexs measure each sample, carborundum content and iron oxide content;
Tester and NHD-02 refractoriness test furnace detection each sample maximum operation (service) temperature is softened by HRY-02IIP high temperature load;
Calcination 3 hours at sample being placed in 815 DEG C, by its volume density of YB/T5200 Indexs measure;
Calcination 3 hours at sample being placed in 815 DEG C, uses by its cold conditions compressive strength of YB/T5201 Indexs measure;
At sample being placed in 1500 DEG C, calcination 3 hours, detects its crushing strength under high temperature;
Calcination 3 hours at sample being placed in 815 DEG C, uses KZJ-5000 electric bending testing machine for cement by its cold conditions folding strength of YB/T5201 Indexs measure;
Calcination 3 hours at sample being placed in 815 DEG C, by its permanent line velocity of variation of YB/T5203 Indexs measure;
Calcination 3 hours at sample being placed in 1200 DEG C, detects it and burns rear Linear change rate;
Calcination 3 hours at sample being placed in 815 DEG C, uses KRZ-F02 heat-shock resistance trier by its thermal shock resistance of YB/T2206 Indexs measure;
Calcination 3 hours at sample being placed in 815 DEG C, uses HAT-12A high-temperature abrasion test machine by its wear resistance of GB/T18301 Indexs measure;
Result is as shown in table 1.
Table 1:
As shown in Table 1, use the corundum abrasion-proof fire-resistant moldable refractory of manufacture of the present invention compared with commercial common corundum plastic refractory, main component alumina content is higher, foreign matter content is low, resistance to elevated temperatures is strong, and each performance difference is little in the cold state, and after pyroprocessing, each performance has remarkable lifting.And known by table 1, the lanthanum added in the feed and lanthanide metal oxide micro mist and yttrium powder amount can affect its resistance to elevated temperatures, and the amount of adding is more, and high-temperature behavior is better.
Claims (6)
1. a corundum abrasion-proof fire-resistant moldable refractory, is characterized in that, is made up of the raw material of following mass percent:
Corundum: 65-85%;
Chromium corundum: 10-20%;
Zircon: 5-10%;
Alumina powder: 1-5%;
Zirconium powder: 0.1-1%;
Lanthanum and lanthanide metal oxide micro mist: 0.01-0.1%;
Yttrium powder: 0.01-0.1%;
Dispersion agent: 0.5-3%;
Bonding agent: 0.5-3%;
Its raw material granularity is as follows:
Corundum: 8-1mm;
Chromium corundum: 8-1mm;
Zircon: 8-1mm;
Alumina powder: < 0.088mm;
Zirconium powder: d
50=5 μm;
Lanthanum and lanthanide metal oxide micro mist: d
50=5 μm;
Yttrium powder: d
50=5 μm.
2. a kind of corundum abrasion-proof fire-resistant moldable refractory as claimed in claim 1, it is characterized in that, described corundum purity is not less than 97%, chromium corundum purity is not less than 98%, zircon purity is not less than 98%, alumina powder purity is not less than 99%, and zirconium powder, lanthanum and lanthanide metal oxide micro mist and yttrium powder purity are not less than 99.9%.
3. a kind of corundum abrasion-proof fire-resistant moldable refractory as claimed in claim 1, is characterized in that, described dispersion agent is at least one in poly-phosphate and/or polyacrylate.
4. a kind of corundum abrasion-proof fire-resistant moldable refractory as claimed in claim 1, is characterized in that, described bonding agent is by aluminium dihydrogen phosphate and sodium lignosulfonate solution composition.
5. a kind of corundum abrasion-proof fire-resistant moldable refractory as described in claim 1 and 4, is characterized in that, in described bonding agent, aluminium dihydrogen phosphate and sodium lignosulfonate solution weight are than being 1:1 ~ 3.
6. a preparation method for corundum abrasion-proof fire-resistant moldable refractory, is characterized in that, step is as follows:
(1) fine grinding: corundum, chromium corundum and zircon are sent into respectively and pulverizes in atomizer mill, be crushed to particle diameter and be less than 1mm;
(2) premix: corundum, chromium corundum and the zircon after fine grinding in step (1) and alumina powder are sent into premix 5-10 minute in sand mill in proportion;
(3) batch mixing: dispersion agent is added in the raw material of premix in step (2), mix 10-30 minute in sand mill; Add zirconium powder, lanthanum and lanthanide metal oxide micro mist and yttrium powder, in sand mill, mix 10-30 minute; Add bonding agent, mixing 10-30 minute, makes pug;
(4) dry: by pug seasoning 24h in step (3), to moisture not higher than 0.05%;
(5) choose, inspection, packaging warehouse-in.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106750418A (en) * | 2016-12-16 | 2017-05-31 | 四川大学 | The method that irradiation to crack prepares the PTFE micro mists of good thermal stability |
| CN110302881A (en) * | 2019-06-29 | 2019-10-08 | 山东耀华特耐科技有限公司 | A kind of production technology of anti-crack corrosive-proof plastic material |
| CN110655410A (en) * | 2019-09-26 | 2020-01-07 | 宜兴市宏业保温工程有限公司 | Refractory plastic material for coking furnace door |
| CN110835260A (en) * | 2018-08-16 | 2020-02-25 | 上海皕涛耐火材料有限公司 | High-wear-resistance chrome corundum ramming material and application thereof |
| CN115626831A (en) * | 2022-10-24 | 2023-01-20 | 宜兴兴贝耐火材料制品有限公司 | High-wear-resistance zirconium-chromium-based corundum refractory plastic material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106750418A (en) * | 2016-12-16 | 2017-05-31 | 四川大学 | The method that irradiation to crack prepares the PTFE micro mists of good thermal stability |
| CN110835260A (en) * | 2018-08-16 | 2020-02-25 | 上海皕涛耐火材料有限公司 | High-wear-resistance chrome corundum ramming material and application thereof |
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| CN110655410A (en) * | 2019-09-26 | 2020-01-07 | 宜兴市宏业保温工程有限公司 | Refractory plastic material for coking furnace door |
| CN115626831A (en) * | 2022-10-24 | 2023-01-20 | 宜兴兴贝耐火材料制品有限公司 | High-wear-resistance zirconium-chromium-based corundum refractory plastic material and preparation method thereof |
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