CN105347818A - Small blast furnace ironmaking special-purpose stemming - Google Patents
Small blast furnace ironmaking special-purpose stemming Download PDFInfo
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- CN105347818A CN105347818A CN201510735391.6A CN201510735391A CN105347818A CN 105347818 A CN105347818 A CN 105347818A CN 201510735391 A CN201510735391 A CN 201510735391A CN 105347818 A CN105347818 A CN 105347818A
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Abstract
The invention discloses small blast furnace ironmaking special-purpose stemming. The small blast furnace ironmaking special-purpose stemming comprises, by weight, 15-20 parts of chromium nitride with particle sizes of 3-1mm, 5-8 parts of sialon with particle sizes of 1-0mm, 10-15 parts of sillimanite with particle sizes of 1-0mm, 8-15 parts of iron magnesium oxide with particle sizes of 0.5-0mm, 8-13 parts of clay-like powder, 3-7 parts of cobalt aluminum oxide powder, 5-10 parts of cutting powder, 7-25 parts of crystalline flake graphite powder, 5-10 parts of composite carbon powder and 1-2 parts of middle temperature asphalt powder. The stemming can keep iron outlet size stability, prevent easy size change, guarantee iron outlet stability, and has stable usage performances and operation performances in long-term storage.
Description
Technical field
The invention belongs to the blast furnace small blast furnace ironmaking moldable field of special-purpose fire-resistant, be specifically related to a kind of small blast furnace and smelt iron special stemming and preparation method.
Background technology
Blast furnace is the main equipment of smelting molten iron, and after blast-furnace smelting iron, needs molten iron to release through blast furnace iron notch to carry out continuously to ensure to smelt, and iron notch must be blocked, blocks the material of iron notch, be stemming.At present, when smelting some particular iron ore such as containing the iron ore that vanadium titanium is high, because vanadium, titanyl compound fusing point are very high, it is higher than tapping temperature, can not be melted when tapping a blast furnace, and can be deposited on iron notch, cause tying thicker and thicker, cause the aperture of iron notch to change; Generally cannot process in time again iron notch under high temperature, the change of iron notch has had a strong impact on the stable of iron mouth and has tapped a blast furnace, shakiness when causing tapping a blast furnace, and very easily causes molten iron to run large stream, flame arrow, gives and arrange the production program that blast furnace normally taps a blast furnace to bring difficulty.
Summary of the invention
The object of this invention is to provide a kind of aperture that can ensure iron notch to stablize, can stablize and tap a blast furnace, stemming easy to use and production method thereof.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of small blast furnace smelts iron special stemming, it is characterized in that described small blast furnace is smelted iron special stemming and is made up of the component of following weight part: 3-1mm mono-chromium nitride: 15 ~ 20 parts; 1-0mm Sialon: 5 ~ 8 parts; 1-0mm sillimanite: 10 ~ 15 parts; 0.5-0mm magnesium oxide iron: 8 ~ 15 parts; Inclined clay powder: 8 ~ 13 parts; Cobalt oxide aluminium powder 3-7 part, cutting powder: 5 ~ 10 parts; Crystalline graphite powder: 7 ~ 25 parts, compound powdered carbon 5-10 part, mid-temperature pitch powder: 1 ~ 2 part; Additional modification tar: 13 ~ 16 parts; Described modification tar is that 100 parts of modification tar include 97 parts, tar, ethylene glycol 1 part, N-methyl pyrrole network alkane ketone 2 parts, is that three kinds of materials mediations form.
Described compound powdered carbon is hard charcoal, sugar charcoal, the mixture of pitch coke weight ratio 1:2:7.
Described inclined clay powder reaches the substance A of more than 60% for first clay obtains weight ratio shared by the composition of metakaolin after Overheating Treatment, and substance A and white garnet, dextrin mix by weight 8.5:1.2:0.3, are inclined clay powder.
Described cutting powder is the cutting powder cutting silicon single crystal generation in monocrystalline silicon production process, and described main component is SiC50-70%; Elemental silicon 30-50%.
Further, described a kind of small blast furnace smelts iron the preparation method of special stemming, it is characterized in that adopting following processing method to obtain: the first step produces stemming, by 3-1mm mono-chromium nitride: 15 ~ 20 parts; 1-0mm Sialon: 5 ~ 8 parts; 1-0mm sillimanite: 10 ~ 15 parts; 0.5-0mm magnesium oxide iron: 8 ~ 15 parts; Inclined clay powder: 8 ~ 13 parts; Cobalt oxide aluminium powder 3-7 part, cutting powder: 5 ~ 10 parts; Crystalline graphite powder: 7 ~ 25 parts, compound powdered carbon 5-10 part, mid-temperature pitch powder: 1 ~ 2 part, puts into wheeled mixing pan, first pre-mixing 15 minutes; Then 85% of modification tar total amount is added, wet stone roller 35 minutes; Add 15% remaining modification tar, rewetting grinds 15 minutes; Through stemming microtome, then through mud extruder, squeeze mud shaping, be as cold as room temperature after cutting section, the crowded mud temperature in this step is set as 55 DEG C; Second step joins basting agent, by zirconic acid calcium powder, and crystalline graphite powder, potassium silicate solution is made into Homogeneous phase mixing liquid by weight 38:32:30 stirring and is basting agent, stand-by; 3rd step, smears surface by cooled stemming basting agent, reinstalls packing bag, be finished product after drying.
Beneficial effect of the present invention: the stemming adopting this technical scheme to produce and the used stemming of blast furnace contrast, use the iron notch aperture of stemming of the present invention very stable, there is not the situation that iron notch aperture obviously diminishes, also without the phenomenon of reaming, meet completely blast furnace normally tap a blast furnace produce needs, thoroughly save cost for iron and steel enterprise and user, effectively can improve current blast furnace due to the varying aperture of iron notch thus the molten iron discharging caused is unstable, the easy race caused due to flowing molten iron instability when tapping a blast furnace is flowed greatly, the problems such as flame arrow.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1: a kind of 450m3 small blast furnace that is used for smelts iron special stemming, is characterized in that described small blast furnace is smelted iron special stemming and is made up of the component of following weight part: 3-1mm mono-chromium nitride: 20 parts; 1-0mm Sialon: 8 parts; 1-0mm sillimanite: 15 parts; 0.5-0mm magnesium oxide iron: 15 parts; Inclined clay powder: 9 parts; Cobalt oxide aluminium powder 3 parts, cutting powder: 5 parts; Crystalline graphite powder: 14 parts, compound powdered carbon 10 parts, mid-temperature pitch powder: 1 part; The preparation method of stemming: above-mentioned raw materials is put into mixing pan, first pre-mixing 15 minutes; Prepare 13 parts, modification tar, first add 85% of modification tar total amount, wet stone roller 35 minutes; Add 15% remaining modification tar, rewetting grinds 15 minutes; Through stemming microtome, then shaping through squeezing mud, be as cold as room temperature after cutting section, the crowded mud temperature in this step is set as 55 DEG C; Second step joins basting agent, by zirconic acid calcium powder, and crystalline graphite powder, potassium silicate solution is made into Homogeneous phase mixing liquid by weight 38:32:30 stirring and is basting agent, stand-by; 3rd step, smears surface by cooled stemming basting agent, reinstalls packing bag, be finished product after drying.
Embodiment 2: a kind of 600m3 small blast furnace that is used for smelts iron special stemming, is characterized in that described small blast furnace is smelted iron special stemming and is made up of the component of following weight part: 3-1mm mono-chromium nitride: 19 parts; 1-0mm Sialon: 7 parts; 1-0mm sillimanite: 14 parts; 0.5-0mm magnesium oxide iron: 15 parts; Inclined clay powder: 10 parts; Cobalt oxide aluminium powder 5 parts, cutting powder: 5 parts; Crystalline graphite powder: 18 parts, compound powdered carbon 6 parts, mid-temperature pitch powder: 1 part.The preparation method of stemming: all raw materials are put into mixing pan, first pre-mixing 15 minutes; Prepare 14 parts, modification tar, first add 85% of modification tar total amount, wet stone roller 35 minutes; Add 15% remaining modification tar, rewetting grinds 15 minutes; Through stemming microtome, then through mud extruder, squeeze mud shaping, be as cold as room temperature after cutting section, the crowded mud temperature in this step is set as 55 DEG C; Second step joins basting agent, by zirconic acid calcium powder, and crystalline graphite powder, potassium silicate solution is made into Homogeneous phase mixing liquid by weight 38:32:30 stirring and is basting agent, stand-by; 3rd step, smears surface by cooled stemming basting agent, reinstalls packing bag, be finished product after drying.
Embodiment 3: a kind of 800m3 small blast furnace that is used for smelts iron special stemming, is characterized in that described small blast furnace is smelted iron special stemming and is made up of the component of following weight part: 3-1mm mono-chromium nitride: 20 parts; 1-0mm Sialon: 6 parts; 1-0mm sillimanite: 14 parts; 0.5-0mm magnesium oxide iron: 13 parts; Inclined clay powder: 10 parts; Cobalt oxide aluminium powder 5 parts, cutting powder: 5 parts; Crystalline graphite powder: 20 parts, compound powdered carbon 6 parts, mid-temperature pitch powder: 1 part.The preparation method of stemming: all raw materials are put into the first pre-mixing of mixing pan 15 minutes; Prepare 15 parts, modification tar, first add 85% of modification tar total amount, wet stone roller 35 minutes; Add 15% remaining modification tar, rewetting grinds 15 minutes; Through stemming microtome, then through mud extruder, squeeze mud shaping, be as cold as room temperature after cutting section, the crowded mud temperature in this step is set as 55 DEG C; Second step joins basting agent, by zirconic acid calcium powder, and crystalline graphite powder, potassium silicate solution is made into Homogeneous phase mixing liquid by weight 38:32:30 stirring and is basting agent, stand-by; 3rd step, smears surface by cooled stemming basting agent, reinstalls packing bag, be finished product after drying.
Embodiment 4: a kind of 900m3 small blast furnace that is used for smelts iron special stemming, is characterized in that described small blast furnace is smelted iron special stemming and is made up of the component of following weight part: 3-1mm mono-chromium nitride: 15 parts; 1-0mm Sialon: 8 parts; 1-0mm sillimanite: 11 parts; 0.5-0mm magnesium oxide iron: 11 parts; Inclined clay powder 10 parts; Cobalt oxide aluminium powder 7 parts, cutting powder: 10 parts; Crystalline graphite powder: 20 parts, compound powdered carbon 6 parts, mid-temperature pitch powder: 2 parts.The preparation method of stemming: all raw materials are put into mixing pan, first pre-mixing 15 minutes; Prepare 16 parts, modification tar, first add 85% of modification tar total amount, wet stone roller 35 minutes; Add 15% remaining modification tar, rewetting grinds 15 minutes; Through stemming microtome, then through mud extruder, squeeze mud shaping, be as cold as room temperature after cutting section, the crowded mud temperature in this step is set as 55 DEG C; Second step joins basting agent, by zirconic acid calcium powder, and crystalline graphite powder, potassium silicate solution is made into Homogeneous phase mixing liquid by weight 38:32:30 stirring and is basting agent, stand-by; 3rd step, smears surface by cooled stemming basting agent, reinstalls packing bag, be finished product after drying.
Comparative example: the used stemming of blast furnace will be tested, carry out performance comparison with stemming of the present invention; The use properties detected result of above-described embodiment 1 ~ 4 and comparative example the results are shown in following table (experimental period is 3 months), wherein comparative example 1 and contrast 2 are the blast furnace service condition of smelting sefstromite stone, and comparative example 3 and comparative example 4 are that the blast furnace that common non-sefstromite stone is smelted uses contrast situation.Visible, no matter be vanadium titanium blast-furnace smelting, or common iron ore blast-furnace smelting, each aspect of the present invention effect is far superior to the stemming of the current use of client.
Product of the present invention uses through curstomer's site workman, unanimously thinks: easily beat mud, iron mouth appropriate depth, and the mean pressure big gun time is short, and rapidly, anti-slag iron aggressiveness is good for sintering, and iron notch aperture is stablized, and taps a blast furnace stable, without spray rocket phenomenon.
This specific embodiment is only explanation of the invention; it is not the restriction to invention; those skilled in the art can make any amendment to the present embodiment after reading this specification as required, as long as but be all subject to the protection of patent law in right of the present invention.
Claims (5)
1. small blast furnace smelts iron a special stemming, it is characterized in that described stemming is made up of the component of following weight part: 3-1mm mono-chromium nitride: 15 ~ 20 parts; 1-0mm Sialon: 5 ~ 8 parts; 1-0mm sillimanite: 10 ~ 15 parts; 0.5-0mm magnesium oxide iron: 8 ~ 15 parts; Inclined clay powder: 8 ~ 13 parts; Cobalt oxide aluminium powder 3-7 part, cutting powder: 5 ~ 10 parts; Crystalline graphite powder: 7 ~ 25 parts, compound powdered carbon 5-10 part, mid-temperature pitch powder: 1 ~ 2 part; Additional modification tar: 13 ~ 16 parts; Described modification tar is that 100 parts of modification tar include 97 parts, tar, ethylene glycol 1 part, N-methyl pyrrole network alkane ketone 2 parts, is in harmonious proportion forms through three kinds of materials.
2. a kind of blast furnace mud according to claim 1, is characterized in that: described compound powdered carbon is hard charcoal, sugar charcoal, and pitch coke three kinds of substance weights are than the mixture of 1:2:7.
3. a kind of blast furnace stemming according to claim 1, it is characterized in that: described inclined clay powder reaches the substance A of more than 60% for first clay obtains weight ratio shared by the composition of metakaolin after Overheating Treatment, substance A mixes by weight 8.5:1.2:0.3 with white garnet, dextrin, is inclined clay powder.
4. a kind of blast furnace mud according to claim 1, is characterized in that: described cutting powder is the cutting powder cutting silicon single crystal generation in monocrystalline silicon production process, and described main component is SiC50-70%, elemental silicon 30-50%.
5. the preparation method of a kind of blast furnace stemming as claimed in claim 1, is characterized in that adopting following processing method to obtain: the first step produces stemming, by 3-1mm mono-chromium nitride: 15 ~ 20 parts; 1-0mm Sialon: 5 ~ 8 parts; 1-0mm sillimanite: 10 ~ 15 parts; 0.5-0mm magnesium oxide iron: 8 ~ 15 parts; Inclined clay powder: 8 ~ 13 parts; Cobalt oxide aluminium powder 3-7 part, cutting powder: 5 ~ 10 parts; Crystalline graphite powder: 7 ~ 25 parts, compound powdered carbon 5-10 part, mid-temperature pitch powder: 1 ~ 2 part, puts into wheeled mixing pan, first pre-mixing 15 minutes; Then 85% of modification tar total amount is added, wet stone roller 35 minutes; Add 15% remaining modification tar, rewetting grinds 15 minutes; Through stemming microtome, then through mud extruder, squeeze mud shaping, be as cold as room temperature after cutting section, the crowded mud temperature in this step is set as 55 DEG C; Second step joins basting agent, by zirconic acid calcium powder, and Graphite Powder 99, potassium silicate solution is made into Homogeneous phase mixing liquid by weight 38:32:30 stirring and is basting agent, prepares stand-by; 3rd step, smears surface by cooled stemming basting agent, reinstalls packing bag, be finished product after drying.
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| CN201510735391.6A CN105347818A (en) | 2015-11-03 | 2015-11-03 | Small blast furnace ironmaking special-purpose stemming |
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| CN201510735391.6A CN105347818A (en) | 2015-11-03 | 2015-11-03 | Small blast furnace ironmaking special-purpose stemming |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330310A (en) * | 2015-11-03 | 2016-02-17 | 山国强 | Stemming |
| CN106927843A (en) * | 2017-04-18 | 2017-07-07 | 王冰 | A kind of blast furnace ironmaking tap-hole clay and preparation method thereof |
| CN108840691A (en) * | 2018-08-07 | 2018-11-20 | 李保珍 | A kind of aquamaine ground mass stemming composite material and preparation method |
-
2015
- 2015-11-03 CN CN201510735391.6A patent/CN105347818A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330310A (en) * | 2015-11-03 | 2016-02-17 | 山国强 | Stemming |
| CN106927843A (en) * | 2017-04-18 | 2017-07-07 | 王冰 | A kind of blast furnace ironmaking tap-hole clay and preparation method thereof |
| CN108840691A (en) * | 2018-08-07 | 2018-11-20 | 李保珍 | A kind of aquamaine ground mass stemming composite material and preparation method |
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