CN103193494A - Technological process for preparation of converter sliding plate inlaid zirconium product - Google Patents
Technological process for preparation of converter sliding plate inlaid zirconium product Download PDFInfo
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- CN103193494A CN103193494A CN2013101288346A CN201310128834A CN103193494A CN 103193494 A CN103193494 A CN 103193494A CN 2013101288346 A CN2013101288346 A CN 2013101288346A CN 201310128834 A CN201310128834 A CN 201310128834A CN 103193494 A CN103193494 A CN 103193494A
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Abstract
The invention discloses a technological process for preparation of converter sliding plate inlaid zirconium product. The technological process comprises the following steps of: mixing and milling raw materials; blanking by using the raw materials; sintering; deironing; preparing powder; mixing; pelleting; mechanical pressing and drying; cellaring; high-temperature sintering; taking out from cellar; inspection; packaging, and obtaining the finished product. Basic magnesium carbonate and iridium oxide added in the technological process provided by the invention can enhance the stability of zirconia, and consequentially, the normal temperature compression strength, the thermal shock stability and the scouring resistance of the product are improved remarkably. The accessory added during the mixing process guarantees the formation density and the blank strength, the product shrinkage is controlled to be 3-10%, the product shrinking percentage can be regulated by regulation on the dosage of the powder and the magnesium-zirconium powder, moreover, unnecessary impurities are eliminated in the technology, cracking of zirconium product is reduced effectively, and the quality of product is guaranteed.
Description
Technical field
The invention belongs to zirconium product process for processing technical field, be specifically related to the technical process that a kind of converter slide plate is inlayed the zirconium product preparation.
Background technology
The zirconium product that uses at present all is to use the electric smelting stabilizing zirconia to be main raw material, adds a spot of electric smelting monoclinic zirconia or desiliconization zirconium white, compression moulding, and the poor stability of this method product, and also work-ing life is short.The structure of existing zirconium product is single, though increased titanium dioxide, calcium oxide etc., increased certain stability, but its physical strength is relatively poor, and wear resistance is not enough, a little less than the scour resistance, in addition, owing in technological process, there is not deimpurity step, make product foreign matter content height, influence the quality of product.
Summary of the invention
Goal of the invention: the objective of the invention is at the deficiencies in the prior art, provide a kind of converter slide plate to inlay the technical process of zirconium product preparation.
Technical scheme: a kind of converter slide plate provided by the invention is inlayed the technical process of zirconium product preparation, and described process flow steps is:
1) raw material mix grinding: be that the magnesium basic carbonate of 85%-88% zirconium dioxide, 10%-12% and the iridium oxide mix grinding of 2%-3% obtain fine powder with massfraction;
2) raw material base: in above-mentioned fine powder, add wedding agent, and stir with stirrer, in mould, be pressed into the raw material base substrate;
3) burn till: the raw material base substrate is put into the cellar for storing things stove, burn till at 1350-1400 ℃, be incubated 9-10 hour, always firing time is to obtain sintered body in 45-50 hour;
4) with the broken machine of jaw, twin rollers, sieve apparatus sintered body is handled the particle that obtains different-grain diameter successively, collect the particle of 0.2-0.5mm granularity and less than the particle of 0.2mm granularity.
5) deironing: with acid the particle of 0.2-0.5mm granularity is handled, and washing and drying obtains particle A, to handling less than the particle of 0.2mm granularity, and washing and drying obtains particle B with sour;
6) powder preparation: B wears into powder with ball mill with particle, and 95% obtains powder material B by 600 orders;
7) mixing: with adding 30-40% powder material B and batching A among the 60-70% particle A, stirred 30-40 minute, the sieve aperture specification of sieving is 10 orders, and the bundle material obtains batch mixing A more than 10 hours;
8) granulation: batch mixing A is pressed into base substrate A, pulverizes base substrate A, crosses 2.5mm sieve screening with sieve apparatus and obtain mixed material B with twin rollers with hydropress;
9) mechanical pressing: installation mold, with hydropress mixed material B is suppressed to obtain sheet-shaped blank B or ring-type base substrate B;
10) drying: sheet-shaped blank B or ring-type base substrate B are packed in the loft drier, 5-8 ℃/hour of drying and warning speed, 150-160 ℃ of insulation 7-8 hour, rate of weight loss obtains sheet-shaped blank C or ring-type base substrate C at 2.0%-2.5%;
11) dress is stored: sheet-shaped blank C side is put put 10-15 ° of angle, keep the 2-3mm distance between every; Ring-type base substrate C builds dress, and highly control is at 50-60cm;
12) high temperature sintering: interior temperature rise rate 30-40 ℃/hour of cellar for storing things, 1700-1750 ℃ is burnt till, and is incubated 10 hours, firing time 70-75 hour, cools off 86-96 hour;
13) go out the cellar for storing things: after closing burner, when furnace temperature drops to 600 ℃, wicket is opened, when furnace temperature drops to 200 ℃ again, kiln car can be pulled out outside the burner hearth, block fire door with asbestos tile;
14) check;
15) packing get final product finished product.
In order to mix, the mix grinding time in the described step 1) is 14-16 hour, described fine powder ratio of grinding media to material 2:1, and fine powder fineness 95% is by 400 orders; In order to increase the intensity of base substrate, described step 2) in wedding agent be the chemical paste of 2.5-3%, described chemical paste is that the modulation of carboxymethyl cellulose and water forms, wherein, the mass ratio of carboxymethyl cellulose and water is 1:10; In order to remove impurity wherein, particularly ferro element, the acid in the described step 5) is 15% hydrochloric acid, soaks therein more than 12 hours, uses deionized water rinsing 2 times, and 120 ℃ of dryings obtain particle A and particle B more than 12 hours; Wherein, step 6) is to burn till intensity in order to improve, in the described step 7) batching A be that 5-20% magnesium zirconium powder and 2.5-3.5% resol are in order to guarantee that compact density, blank strength product shrink control at 8-10%, can adjust the product shrinking percentage by the add-on of adjusting powder and magnesium zirconium powder; Described step 11), 12), the cellar for storing things 13) is 10m
3Shuttle kiln; The finished product density that obtains in the described step 15) is 5.0-5.4g/cm
3, normal temperature is withstand voltage at 350-550Mpa.
Beneficial effect: compared with prior art, the present invention has the following advantages: the magnesium basic carbonate that adds in the technical process of the present invention and iridium oxide can strengthen zirconic stability, and the cold crushing strength of product, thermal shock resistance, scour resistance are significantly increased.The batching that increases in mixing process guarantees compact density, blank strength, product shrinks control at 8-10%, can adjust the product shrinking percentage by the add-on of adjusting powder and magnesium zirconium powder, and removed unnecessary impurity in this technology, effectively reduce the zirconium product cracking, guaranteed the quality of product, zirconium plate or the zirconium ring of the present invention's preparation are embedded on the zirconium white converter slide plate, not only make improve greatly the work-ing life of converter slide plate, brought up to more than 20 stoves from 8 original stoves, and the pushing off the slag success ratio is 100%, the quantity of slag is reduced to 2.2kg by ton steel 12kg under the converter, and the recovery rate of alloy and reductor improves more than 2% than slag-blocking ball.
Embodiment
Embodiment 1:
A kind of zirconium white converter slide plate is inlayed the technical process of zirconium plate preparation, and described process flow steps is:
1) raw material mix grinding: be that 85% zirconium dioxide, 12% magnesium basic carbonate and 3% iridium oxide mix grinding obtained fine powder in 14 hours with massfraction; Fine powder ratio of grinding media to material 2:1, fine powder fineness 95% is by 400 orders;
2) raw material base: the chemical paste of adding 2.5 in above-mentioned fine powder, described chemical paste are that carboxymethyl cellulose and water modulation form, and wherein, the mass ratio of carboxymethyl cellulose and water is 1:10, and stirs with stirrer, is pressed into the raw material base substrate in mould;
3) burn till: the raw material base substrate is put into the cellar for storing things stove, burn till at 1350 ℃, be incubated 9 hours, always firing time is to obtain sintered body in 45 hours;
4) granules preparation: with the broken machine of jaw, twin rollers, sieve apparatus sintered body is handled the particle that obtains different-grain diameter successively, collect the particle of 0.2mm-0.5mm granularity and the particle of the following granularity of 0.2mm;
5) deironing: with acid the particle of 0.2mm-0.5mm granularity is handled, and washing and drying obtains particle A, with sour the particle of the following granularity of 0.2mm is handled, and washing and drying obtains particle B;
6) powder preparation: B wears into powder with ball mill with particle, and 95% obtains powder material B by 600 orders;
7) mixing: with adding 30% powder material B and 5% magnesium zirconium powder and 2.5% resol among the 60% particle A, stirred 40 minutes, the sieve aperture specification of sieving is 10 orders, and the bundle material obtains batch mixing A more than 10 hours;
8) granulation: batch mixing A is pressed into base substrate A, pulverizes base substrate A, crosses 2.5mm sieve screening with sieve apparatus and obtain mixed material B with twin rollers with hydropress;
9) mechanical pressing: tabular mould is installed, mixed material B is suppressed obtaining sheet-shaped blank B with hydropress;
10) drying: sheet-shaped blank B is packed in the loft drier, 5 ℃/hour of drying and warning speed, 150 ℃ of insulations 7 hours, rate of weight loss obtains sheet-shaped blank C 2.0%;
11) dress is stored: sheet-shaped blank C side is put put 10 ° of angles, keep the 2mm distance between every;
12) high temperature sintering: temperature rise rate is 30 ℃/hour in the cellar for storing things, and 1700 ℃ are burnt till, and are incubated 10 hours, and firing time 70 hours cooled off 86 hours;
13) go out the cellar for storing things: after closing burner, when furnace temperature drops to 600 ℃, wicket is opened, when furnace temperature drops to 200 ℃ again, kiln car can be pulled out outside the burner hearth, block fire door with asbestos tile;
14) check;
15) packing gets final product to such an extent that zirconium white converter slide plate is inlayed the zirconium plate.
Wherein, in the described step 9) mechanical pressing the density of sheet-shaped blank B be 4.2g/cm
3, smooth surface is smooth, does not have layering, crackle, unfilled corner and fall the limit, in the described step 14) in the checking procedure sampling experiment carry out heat and shake 1100 ℃ of water-cooleds greater than 3 times, the density of qualified product is 5.0 g/cm
3, the normal temperature carrying capacity is 350MPa in the checkout procedure.Described step 11), 12), the cellar for storing things 13) is 10m
3Shuttle kiln.
Embodiment 2:
A kind of zirconium white converter slide plate is inlayed the technical process of zirconium ring preparation, and described process flow steps is:
1) raw material mix grinding: be that 88% zirconium dioxide, 10% magnesium basic carbonate and 2% iridium oxide mix grinding obtained fine powder in 16 hours with massfraction, described fine powder ratio of grinding media to material 2:1, fine powder fineness 95% is by 400 orders;
2) raw material base: the chemical paste of adding 3% in above-mentioned fine powder, described chemical paste are that carboxymethyl cellulose and water modulation form, and wherein, the mass ratio of carboxymethyl cellulose and water is 1:10, and stirs with stirrer, is pressed into the raw material base substrate in mould;
3) burn till: the raw material base substrate is put into the cellar for storing things stove, burn till at 1400 ℃, be incubated 10 hours, always firing time is to obtain sintered body in 50 hours;
4) granules preparation: with the broken machine of jaw, twin rollers, sieve apparatus sintered body is handled the particle that obtains different-grain diameter successively, collect the particle of 0.2-0.5mm granularity and the particle of the following granularity of 0.2mm;
5) deironing: with acid the particle of 0.2-0.5mm granularity is handled, and washing and drying obtains particle A, with sour the particle of the following granularity of 0.2mm is handled, and washing and drying obtains particle B;
6) powder preparation: B wears into powder with ball mill with particle, and 95% obtains powder material B by 600 orders;
7) mixing: with add among the 70% particle A 40% powder material B and
And 20% magnesium zirconium powder and 3.5% resol, stirring 30 minutes, the sieve aperture specification of sieving is 10 orders, the bundle material obtains batch mixing A more than 10 hours;
8) granulation: batch mixing A is pressed into base substrate A, pulverizes base substrate A, crosses 2.5mm sieve screening with sieve apparatus and obtain mixed material B with twin rollers with hydropress;
9) mechanical pressing: annular die is installed, mixed material B is suppressed obtaining ring-type base substrate B with hydropress;
10) drying: ring-type base substrate B is packed in the loft drier, 8 ℃/hour of drying and warning speed, 160 ℃ of insulations 8 hours, rate of weight loss obtains ring-type base substrate C 2.5%;
11) dress cellar for storing things: ring-type base substrate C is built dress, and highly control is at 60cm;
12) high temperature sintering: temperature rise rate is 40 ℃/hour in the cellar for storing things, and 1750 ℃ are burnt till, and are incubated 10 hours, and firing time 75 hours cooled off 96 hours;
13) go out the cellar for storing things: after closing burner, when furnace temperature drops to 600 ℃, wicket is opened, when furnace temperature drops to 200 ℃ again, kiln car can be pulled out outside the burner hearth, block fire door with asbestos tile;
14) check;
15) packing gets final product to such an extent that zirconium white converter slide plate is inlayed the zirconium ring.
In the described step 9) mechanical pressing the density 4.3g/cm of sheet-shaped blank B
3, smooth surface is smooth, does not have layering, crackle, unfilled corner and fall the limit, in the described step 14) in the checking procedure sampling experiment carry out heat and shake 1100 ℃ of water-cooleds greater than 3 times, the density of qualified product is for being 5.4 g/cm
3, can carrying capacity be 550MPa in the checkout procedure.
Embodiment 3:
A kind of zirconium white converter slide plate is inlayed the technical process of zirconium plate preparation, and described process flow steps is:
1) raw material mix grinding: be that 86% zirconium dioxide, 11% magnesium basic carbonate and 3% iridium oxide mix grinding obtained fine powder in 14 hours with massfraction, fine powder ratio of grinding media to material 2:1, fine powder fineness 95% is by 400 orders;
2) raw material base: the chemical paste of adding 2.8% in above-mentioned fine powder, described chemical paste are that carboxymethyl cellulose and water modulation form, and wherein, the mass ratio of carboxymethyl cellulose and water is 1:10, and stirs with stirrer, is pressed into the raw material base substrate in mould;
3) burn till: the raw material base substrate is put into the cellar for storing things stove, burn till at 1360 ℃, be incubated 9.5 hours, always firing time is to obtain sintered body in 48 hours;
4) granules preparation: with the broken machine of jaw, twin rollers, sieve apparatus sintered body is handled the particle that obtains different-grain diameter successively, collect the particle of 0.2mm-0.5mm granularity and the particle of the following granularity of 0.2mm;
5) deironing: with acid the particle of 0.2mm-0.5mm granularity is handled, and washing and drying obtains particle A, with sour the particle of the following granularity of 0.2mm is handled, and washing and drying obtains particle B;
6) powder preparation: B wears into powder with ball mill with particle, and 95% obtains powder material B by 600 orders;
7) mixing: with adding 35% powder material B and 10% magnesium zirconium powder and 3% resol among the 65% particle A, stirred 35 minutes, the sieve aperture specification of sieving is 10 orders, and the bundle material obtains batch mixing A more than 10 hours;
8) granulation: batch mixing A is pressed into base substrate A, pulverizes base substrate A, crosses 2.5mm sieve screening with sieve apparatus and obtain mixed material B with twin rollers with hydropress;
9) mechanical pressing: tabular mould is installed, mixed material B is suppressed obtaining sheet-shaped blank B with hydropress;
10) drying: sheet-shaped blank B is packed in the loft drier, 6 ℃/hour of drying and warning speed, 155 ℃ of insulations 7.5 hours, rate of weight loss obtains sheet-shaped blank C 2.25%;
11) dress is stored: sheet-shaped blank C side is put put 13 ° of angles, keep the 2.5mm distance between every;
12) high temperature sintering: temperature rise rate is 35 ℃/hour in the cellar for storing things, and 1725 ℃ are burnt till, and are incubated 10 hours, and firing time 73 hours cooled off 90 hours;
13) go out the cellar for storing things: after closing burner, when furnace temperature drops to 600 ℃, wicket is opened, when furnace temperature drops to 200 ℃ again, kiln car can be pulled out outside the burner hearth, block fire door with asbestos tile;
14) check;
15) packing gets final product to such an extent that zirconium white converter slide plate is inlayed the zirconium plate.
In the described step 9) mechanical pressing the density 4.5g/cm of sheet-shaped blank B
3, smooth surface is smooth, does not have layering, crackle, unfilled corner and fall the limit, in the described step 14) in the checking procedure sampling experiment carry out heat and shake 1100 ℃ of water-cooleds greater than 3 times, the density of qualified product is 5.2 g/cm
3, can carrying capacity be 400MPa in the checkout procedure.
It is as follows for the performance test data that the converter slide plate carries out that the zirconium white converter slide plate of embodiment 1 ~ 3 preparation is inlayed the zirconium plate:
| Embodiment | Volume density g/cm 3 | Apparent porosity % | Melting loss reaming speed, mm/ch |
| 1 | 5.0 | 10.5 | 1.8 |
| 2 | 5.4 | 5.8 | 1.1 |
| 3 | 5.2 | 7.4 | 1.5 |
The above only is preferred implementation of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a converter slide plate is inlayed the technical process that zirconium product prepares, and it is characterized in that: described process flow steps is:
1) raw material mix grinding: be that the magnesium basic carbonate of 85%-88% zirconium dioxide, 10%-12% and the iridium oxide mix grinding of 2%-3% obtain fine powder with massfraction;
2) raw material base: in above-mentioned fine powder, add wedding agent, and stir with stirrer, in mould, be pressed into the raw material base substrate;
3) burn till: the raw material base substrate is put into the cellar for storing things stove, burn till at 1350-1400 ℃, be incubated 9-10 hour, always firing time is to obtain sintered body in 45-50 hour;
4) granules preparation: with the broken machine of jaw, twin rollers, sieve apparatus sintered body is handled the particle that obtains different-grain diameter successively, collect the particle of 0.2-0.5mm granularity and less than the particle of 0.2mm granularity;
5) deironing: with acid the particle of 0.2-0.5mm granularity is handled, and washing and drying obtains particle A, to handling less than the particle of 0.2mm granularity, and washing and drying obtains particle B with sour;
6) powder preparation: B wears into powder with ball mill with particle, and 95% obtains powder material B by 600 orders;
7) mixing: with adding 30-40% powder material B and batching A among the 60-70% particle A, stirred 30-40 minute, the sieve aperture specification of sieving is 10 orders, and the bundle material obtains batch mixing A more than 10 hours;
8) granulation: batch mixing A is pressed into base substrate A, pulverizes base substrate A, crosses 2.5mm sieve screening with sieve apparatus and obtain mixed material B with twin rollers with hydropress;
9) mechanical pressing: installation mold, with hydropress mixed material B is suppressed to obtain sheet-shaped blank B or ring-type base substrate B;
10) drying: sheet-shaped blank B or ring-type base substrate B are packed in the loft drier, 5-8 ℃/hour of drying and warning speed, 150-160 ℃ of insulation 7-8 hour, rate of weight loss obtains sheet-shaped blank C or ring-type base substrate C at 2.0%-2.5%;
11) dress is stored: sheet-shaped blank C side is put put 10-15 ° of angle, keep the 2-3mm distance between every; Ring-type base substrate C builds dress, and highly control is at 50-60cm;
12) high temperature sintering: interior temperature rise rate 30-40 ℃/hour of cellar for storing things, 1700-1750 ℃ is burnt till, and is incubated 10 hours, firing time 70-75 hour, cools off 86-96 hour;
13) go out the cellar for storing things: after closing burner, when furnace temperature drops to 600 ℃, wicket is opened, when furnace temperature drops to 200 ℃ again, kiln car can be pulled out outside the burner hearth, block fire door with asbestos tile;
14) check;
15) packing get final product finished product.
2. a kind of converter slide plate according to claim 1 is inlayed the technical process of zirconium product preparation, and it is characterized in that: the mix grinding time in the described step 1) is 14-16 hour, described fine powder ratio of grinding media to material 2:1, and fine powder fineness 95% is by 400 orders.
3. a kind of converter slide plate according to claim 1 is inlayed the technical process of zirconium product preparation, it is characterized in that: the wedding agent described step 2) is the chemical paste of 2.5-3%, described chemical paste is that carboxymethyl cellulose and water modulation form, wherein, the mass ratio of carboxymethyl cellulose and water is 1:10.
4. a kind of converter slide plate according to claim 1 is inlayed the technical process of zirconium product preparation, it is characterized in that: the acid in the described step 5) is 15% hydrochloric acid, soak therein more than 12 hours, use deionized water rinsing 2 times, 120 ℃ of dryings obtain particle A and particle B more than 12 hours.
5. a kind of converter slide plate according to claim 1 is inlayed the technical process of zirconium product preparation, it is characterized in that: in the described step 7) batching A be 5-20% magnesium zirconium powder and 2.5-3.5% resol.
6. a kind of converter slide plate according to claim 1 is inlayed the technical process of zirconium product preparation, it is characterized in that: described step 11), 12), 13) in the cellar for storing things be 10m
3Shuttle kiln.
7. a kind of converter slide plate according to claim 1 is inlayed the technical process of zirconium product preparation, and it is characterized in that: the finished product density that obtains in the described step 15) is 5.0-5.4g/cm
3, normal temperature is withstand voltage at 350-550Mpa.
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| CN201310128834.6A CN103193494B (en) | 2013-04-15 | 2013-04-15 | Technological process for preparation of converter sliding plate inlaid zirconium product |
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|---|---|---|---|
| CN201310128834.6A CN103193494B (en) | 2013-04-15 | 2013-04-15 | Technological process for preparation of converter sliding plate inlaid zirconium product |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105601275A (en) * | 2016-01-13 | 2016-05-25 | 太仓宏达俊盟新材料有限公司 | Manufacture process of immersive elongated-nozzle zirconia flow control |
| CN106396675A (en) * | 2016-08-31 | 2017-02-15 | 太仓宏达俊盟新材料有限公司 | Preparation method and application of low energy consumption partially-stable zirconia |
-
2013
- 2013-04-15 CN CN201310128834.6A patent/CN103193494B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 冶银平等: "Y-TZP纳米陶瓷的制备、结构及力学性能", 《兰州理工大学学报》 * |
| 樊传刚等: "（MgO）0.1-x(CaO)x(ZrO2)0.9陶瓷的相组成、力学与抗热震性能研究", 《耐火材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105601275A (en) * | 2016-01-13 | 2016-05-25 | 太仓宏达俊盟新材料有限公司 | Manufacture process of immersive elongated-nozzle zirconia flow control |
| CN106396675A (en) * | 2016-08-31 | 2017-02-15 | 太仓宏达俊盟新材料有限公司 | Preparation method and application of low energy consumption partially-stable zirconia |
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| CN103193494B (en) | 2014-08-06 |
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