CN106007745A - Special castable for laterite-nickel ore rotary kiln and manufacturing method of special castable - Google Patents
Special castable for laterite-nickel ore rotary kiln and manufacturing method of special castable Download PDFInfo
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- CN106007745A CN106007745A CN201610326021.1A CN201610326021A CN106007745A CN 106007745 A CN106007745 A CN 106007745A CN 201610326021 A CN201610326021 A CN 201610326021A CN 106007745 A CN106007745 A CN 106007745A
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- Prior art keywords
- rotary kiln
- nickel ore
- bauxite
- ore rotary
- lateritic nickel
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention discloses special castable for a laterite-nickel ore rotary kiln. The special castable is prepared from components in percentage by weight as follows: 1%-15% of bauxite with the particle size being 8-15 mm, 1%-20% of bauxite with the particle size being 5-8 mm, 1%-25% of bauxite with the particle size being 3-5 mm, 5%-30% of bauxite with the particle size being 1-3 mm, 5%-20% of bauxite with the particle size being 0-1 mm, 1%-15% of white corundum fine powder, 1%-15% of silica fume and 1%-15% of activated aluminum oxide micropowder. The invention further discloses a manufacturing method of the special castable for the laterite-nickel ore rotary kiln. The special castable for the laterite-nickel ore rotary kiln has good use performance and small wear degree and has the service life longer than one year at the high-temperature section in the laterite-nickel ore rotary kiln with a direct reduction technology, defects of high probability of wear, poor thermal shock resistance, lower strength, short service life and the like of existing refractory castable for laterite-nickel ore rotary kilns are effectively overcome, the maintenance cost is reduced, and considerable economic benefits can be obtained.
Description
Technical field
The invention belongs to fire resisting material field, relate to a kind of lateritic nickel ore rotary kiln dedicated pouring material and manufacture method thereof.
Background technology
In recent years, China's lateritic nickel ore direct reduction process for rotary kiln technology develops rapidly, and its operation principle is: with laterite ferronickel
Ore deposit is raw material, with cheap coal, mud coal, middle coal as reducing agent, with rotary kiln as main production equipments, by material the pre-heat treatment
-reducing and smelting technique-sorting refine three step, so that it may form product, has technique simple, and energy consumption is little, pollutes little, cost
Low, not by size limit, product nickel content advantages of higher.
Lateritic nickel ore rotary kiln is made up of charging aperture, preheating zone, changeover portion, the section of burning till (high temperature section) and the section of burning till discharging opening.
Kiln body changeover portion temperature is substantially at about 600-700 DEG C, in this section, and the material drying by early stage, preheating, generating unit
Divide internal combustion, the most partly melt caking, and slag is more apparent, therefore abrasiveness is relatively big, and when close to high temperature section, material is located the most substantially
In fritting state, create certain aggressivity.The temperature of the section of burning till is at about 1000-1200 DEG C, high in production process
The erosion of temperature slag material resistance to inner liner of rotary kiln and violent scour, the impact of material in rotary kiln rotation process, and oxidoreduction
The structural stress that reaction produces, all can produce rotary kiln and corrode, once corrode, may result in resistance to material and peel off, obtain service life
Less than guarantee.The resistance to material of lateritic nickel ore inner liner of rotary kiln need to stand serious calorifics, mechanics, chemical depletion effect, therefore its liner is resistance to
Material should possess good anti-erosion, high wear resistance, the performance of high intensity.
Summary of the invention
It is an object of the invention to provide and a kind of there is good anti-erosion, high wear resistance, the lateritic nickel ore rotary kiln of high-intensity performance
Dedicated pouring material and manufacture method thereof.
It is an object of the invention to be achieved through the following technical solutions:
A kind of lateritic nickel ore rotary kiln dedicated pouring material, including the component of following weight percent:
Preferably, described lateritic nickel ore rotary kiln dedicated pouring material includes the component of following weight percent:
Most preferably, described lateritic nickel ore rotary kiln dedicated pouring material includes the component of following weight percent:
Al in bauxite of the present invention2O3Content >=80%, Fe2O3Content≤1.2%, bulk density 2.7～2.85g/cm3；
Adjusting the particle diameter distribution of bauxite, be prepared as 5 kinds of grain size specification, the bauxite solving single specification particle diameter divides in castable
Cloth is irregular, mobility is bad, and after firing, the shortcoming of local easily wear-out failure, effectively improves the mobility of bauxite, prolong
Grow the service life firing product.
Al in described white fused alumina fine powder2O3Content >=99%, mesh number is 320 mesh.Have fabulous under white fused alumina fine powder high temperature
Thermal shock resistance and anti-slag action, the feature that crystal grain intensity is high.
Metallic silicon content >=99% in described SILICA FUME, particle diameter 0～1 μm.
Described Reactive alumina is α-Al2O3Content >=99%, mesh number is the Reactive alumina of 325 mesh.Active oxygen
Changing aluminum micropowder to be easily dispersed, stable chemical performance, high-temperature shrinkage moderate performance, have good sintering character, conversion ratio is high,
Can fully sinter and form fine and close organizational structure, it is thus achieved that good intensity and wearability.
It is a further object to provide the manufacture method of lateritic nickel ore rotary kiln dedicated pouring material, comprise the following steps:
(1), bauxite grind and sieve, respectively obtain particle diameter 8～15mm, 5～8mm, 3～5mm, 1～3mm, 0～
The bauxite of 1mm；
(2) bauxite of different-grain diameter, white fused alumina fine powder, SILICA FUME and Reactive alumina, are proportionally weighed, mixing
?.
The castable of the present invention application in preparing lateritic nickel ore inner liner of rotary kiln.
Lateritic nickel ore rotary kiln dedicated pouring material of the present invention, weighs each raw material mixing by proportioning, adds tripolyphosphate
Sodium, account for raw material gross weight 5-8% water and stir slurry (the wherein addition of water, the water reducer trimerization of prepared good fluidity
The addition of sodium phosphate is all the common knowledge of those skilled in the art, and those skilled in the art can adjust as required
Whole), after molding, maintenance and heat treatment, test physical property, its every physical and chemical index is:
Compared to the prior art, beneficial effects of the present invention:
Lateritic nickel ore rotary kiln dedicated pouring material manufacture method of the present invention is simple, moderate cost；By selecting rational castable group
Divide and ratio, adjust the particle diameter distribution of component, make uniform component distribution, improve the mobility of castable, through high temperature simultaneously
Sintering, the anti-wear performance and mechanical performance, corrosion resistance and the erosion resistibility that form firm Ceramic bond raising material are strong, anti-
Abrasiveness is higher, thermal shock resistance is good, Acidity of Aikalinity atmosphere strong adaptability etc..
Lateritic nickel ore rotary kiln dedicated pouring material serviceability of the present invention is good, and the degree of wear is little, direct at lateritic nickel ore rotary kiln
In reducing process high temperature section, service life reaches more than 1 year, greatly reduces ferronickel enterprise production cost, reduces comprehensive energy consumption, complete
Entirely exceed user's requirement；Efficiently solve that lateritic nickel ore rotary kiln is easy to wear with existing castable refractory, thermal shock resistance is poor, intensity
The shortcomings such as relatively low, service life is short, and make maintenance cost reduce, considerable economic benefit can be obtained.
Detailed description of the invention
Further technical solution of the present invention is described further according to following embodiment.
The manufacture method of lateritic nickel ore rotary kiln dedicated pouring material, including: (1), bauxite grind and sieve, and respectively obtain particle diameter
The bauxite of 8～15mm, 5～8mm, 3～5mm, 1～3mm, 0～1mm；(2), respectively according to table 1 embodiment
1, the formula proportion in embodiment 2, embodiment 3, embodiment 4 and embodiment 5 weighs the bauxite of different-grain diameter, white fused alumina
Fine powder, SILICA FUME and Reactive alumina, mix.
Al in described bauxite2O3Content is 80%, bulk density 2.75g/cm3。
Al in described white fused alumina fine powder2O3Content is 99%, and mesh number is 320 mesh.
In described SILICA FUME, metallic silicon content is 99%, particle diameter 0～1 μm.
α-Al in described Reactive alumina2O3Content is 99%, and mesh number is 325 mesh.
Measure the Al of embodiment 1-5 respectively2O3Content, Fe2O3Content, bulk density；Add water reducer tripolyphosphate
Sodium, account for raw material gross weight 5-8% water and stir that (those skilled in the art can be as required for the slurry of prepared good fluidity
Adjust the addition of water, the addition of water reducer sodium tripolyphosphate), it is thus achieved that the slurry of good fluidity, through molding, maintenance and
Physical property is tested after heat treatment.
Table 1: the consumption (unit: kg) of each component in 5 Example formulations of lateritic nickel ore rotary kiln dedicated pouring material
| Component | Particle diameter | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Bauxite | 8～15mm | 9 | 5 | 10 | 10 | 9 |
| Bauxite | 5～8mm | 15 | 10 | 15 | 13 | 15 |
| Bauxite | 3～5mm | 19 | 17 | 10 | 20 | 20 |
| Bauxite | 1～3mm | 25 | 24 | 25 | 15 | 25 |
| Bauxite | 0～1mm | 15 | 16 | 16 | 16 | 10 |
| White fused alumina fine powder | 320 mesh | 5 | 10 | 10 | 10 | 10 |
| SILICA FUME | 0～1 μm | 7 | 8 | 5 | 8 | 1 |
| Reactive alumina | 325 mesh | 5 | 10 | 9 | 8 | 10 |
The physical and chemical index of 2:5 embodiment lateritic nickel ore rotary kiln dedicated pouring material of table
Claims (9)
1. a lateritic nickel ore rotary kiln dedicated pouring material, it is characterised in that include the component of following weight percent:
Lateritic nickel ore rotary kiln dedicated pouring material the most according to claim 1, it is characterised in that include following weight percentage
The component of content:
Lateritic nickel ore rotary kiln dedicated pouring material the most according to claim 2, it is characterised in that include following weight percentage
The component of content:
Lateritic nickel ore rotary kiln dedicated pouring material the most according to claim 1, it is characterised in that in described bauxite
Al2O3Content >=80%, Fe2O3Content≤1.2%.
Lateritic nickel ore rotary kiln dedicated pouring material the most according to claim 1, it is characterised in that described white fused alumina fine powder
Middle Al2O3Content >=99%, mesh number is 320 mesh.
Lateritic nickel ore rotary kiln dedicated pouring material the most according to claim 1, it is characterised in that gold in described SILICA FUME
Belong to silicone content >=99%, particle diameter 0～1 μm.
Lateritic nickel ore rotary kiln dedicated pouring material the most according to claim 1, it is characterised in that described activated alumina
Micropowder is α-Al2O3Content >=99%, mesh number is the Reactive alumina of 325 mesh.
8. the manufacture method of the lateritic nickel ore rotary kiln dedicated pouring material described in claim 1, it is characterised in that include following step
Rapid:
(1), bauxite grind and sieve, respectively obtain particle diameter 8～15mm, 5～8mm, 3～5mm, 1～3mm, 0～
The bauxite of 1mm；
(2) bauxite of different-grain diameter, white fused alumina fine powder, SILICA FUME and Reactive alumina, are proportionally weighed, mixing
?.
9. the answering in preparing lateritic nickel ore inner liner of rotary kiln of the lateritic nickel ore rotary kiln dedicated pouring material described in claim 1
With.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326021.1A CN106007745A (en) | 2016-05-17 | 2016-05-17 | Special castable for laterite-nickel ore rotary kiln and manufacturing method of special castable |
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| CN201610326021.1A CN106007745A (en) | 2016-05-17 | 2016-05-17 | Special castable for laterite-nickel ore rotary kiln and manufacturing method of special castable |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927841A (en) * | 2017-04-06 | 2017-07-07 | 江苏江能新材料科技有限公司 | A kind of smelting ferronickel from red soil nickel ore mineral hot furnace bell center castable and preparation method |
| CN108585803A (en) * | 2018-04-12 | 2018-09-28 | 山东鲁铭高温材料股份有限公司 | Preparation method of ring-formation-free pellet rotary kiln lining |
| CN108911771A (en) * | 2018-08-23 | 2018-11-30 | 江苏江能新材料科技有限公司 | A kind of fast repairing material and preparation method thereof |
| CN110357596A (en) * | 2019-07-22 | 2019-10-22 | 江苏江能新材料科技有限公司 | A kind of modified lateritic nickel ore rotary kiln dedicated pouring material and its manufacturing method |
| CN111484344A (en) * | 2020-04-21 | 2020-08-04 | 鞍山市正大炉料有限公司 | Cylindrical refractory castable prefabricated member |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927841A (en) * | 2017-04-06 | 2017-07-07 | 江苏江能新材料科技有限公司 | A kind of smelting ferronickel from red soil nickel ore mineral hot furnace bell center castable and preparation method |
| CN108585803A (en) * | 2018-04-12 | 2018-09-28 | 山东鲁铭高温材料股份有限公司 | Preparation method of ring-formation-free pellet rotary kiln lining |
| CN108585803B (en) * | 2018-04-12 | 2020-10-27 | 山东鲁铭高温材料股份有限公司 | Preparation method of ring-formation-free pellet rotary kiln lining |
| CN108911771A (en) * | 2018-08-23 | 2018-11-30 | 江苏江能新材料科技有限公司 | A kind of fast repairing material and preparation method thereof |
| CN110357596A (en) * | 2019-07-22 | 2019-10-22 | 江苏江能新材料科技有限公司 | A kind of modified lateritic nickel ore rotary kiln dedicated pouring material and its manufacturing method |
| CN111484344A (en) * | 2020-04-21 | 2020-08-04 | 鞍山市正大炉料有限公司 | Cylindrical refractory castable prefabricated member |
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