CN101555155A - Dry type ramming material for continuous casting tundish - Google Patents
Dry type ramming material for continuous casting tundish Download PDFInfo
- Publication number
- CN101555155A CN101555155A CNA2009103026708A CN200910302670A CN101555155A CN 101555155 A CN101555155 A CN 101555155A CN A2009103026708 A CNA2009103026708 A CN A2009103026708A CN 200910302670 A CN200910302670 A CN 200910302670A CN 101555155 A CN101555155 A CN 101555155A
- Authority
- CN
- China
- Prior art keywords
- continuous casting
- dry type
- percent
- casting tundish
- tundish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention belongs to the field of iron and steel smelting. The technical problem which the invention aims to solve is to prolong the service life of the ladle in the prior art. The technical proposal for solving the technical problem is to provide a dry type ramming material for a continuous casting tundish. The dry type ramming material for the continuous casting tundish is prepared by raw materials according to the following weight ratio: 55 percent to 65 percent of refractory aggregate, 10 percent to 20 percent of refractory powder, 4 percent to 8 percent of additive, and 5 percent to 7 percent of binder. The dry type ramming material for the continuous casting tundish has high resistance strength, low porosity and simple construction, can significantly prolong the service life of the working layer of the tundish, and has good application prospect.
Description
Technical field
The invention belongs to field of iron and steel smelting, be specifically related to a kind of continuous casting tundish dry type ramming material, be mainly used in the working lining of preparation steelmaking process continuous casting tundish.
Background technology
The continuous casting tundish is a refractory materials container, accepts to water the molten steel that gets off from ladle, and then is assigned in each crystallizer by middle water containing opening and goes.Its effect is:
(1) reduces ferrostatic pressure, keep the stable liquid steel level of tundish, evenly molten steel is injected crystallizer;
(2) impel the inclusion in the molten steel further to float, with cleaning molten steel;
(3) shunting molten steel.To multiple-strand caster, molten steel is assigned to each crystallizer by tundish;
(4) store molten steel.When changing ladle, sequence casting do not subtract pulling rate, for sequence casting creates conditions.As seen, the effect of tundish mainly is decompression, current stabilization, removes to be mingled with, stores and shunt molten steel.
Molten steel is in the tundish retention period, and slag can produce erosion action to the bag wall (being working lining) of tundish, and molten steel can produce souring to the bag wall of tundish simultaneously, influences the work-ing life of tundish.According to the use operating environment of tundish, require the working lining of tundish to have good erosion resistance and erosion.
Traditional bakie working lining adopts magnesia coating, and this material adopts electrosmelted magnesite clinker or magnesite clinker as aggregate, powder, and the Guangxi white clay is made wedding agent, and the paper fiber is made adhesive agent.During use, earlier magnesia coating skinning loam is added the water uniform mixing, manually this material is applied in the inwall of tundish again, after the oven dry, can use.This magnesia coating in use has the following disadvantages:
(1) owing in the use, add water, oven dry posterior spiracle rate increases, and erosion resistance reduces;
(2) intensity is low, and abrasion resistance reduces;
(3) manually smear, labour intensity is big, and efficient is low.
Summary of the invention
Technical problem to be solved by this invention is the work-ing life of improving the continuous casting bakie working lining of prior art.The technical scheme that solves this technical problem provides a kind of continuous casting tundish dry type ramming material.This continuous casting tundish is prepared from by the following weight proportion raw material with dry type ramming material, refractory aggregate, 65%～75%, powder 15%～25%, additive 4%～8% and wedding agent 5%～7%.
Wherein, above-mentioned refractory aggregate is an electrosmelted magnesite clinker, and aggregate size was 5mm sieve, i.e. 5～0mm.
Wherein, above-mentioned refractory powder is an electrosmelted magnesite clinker, the granularity≤0.088mm of refractory powder.
Wherein, above-mentioned additive is iron powder and Sodium hexametaphosphate 99, and wherein the amount of allocating into of iron powder is 3%～5%, and the amount of allocating into of Sodium hexametaphosphate 99 is 1%～3%.
Wherein, above-mentioned wedding agent is a solid resin.
Deficiency at magnesia coating is showed in construction and use has designed continuous casting tundish dry type ramming material of the present invention.According to the thickness of continuous casting bakie working lining, adopt electrosmelted magnesite clinker to make aggregate, it is more suitable that the maximum particle size of aggregate is selected about 5mm.Granularity "≤" among the present invention or "＜" expression is the sieve that can cross this granularity, to the requirement of raw material granularity scope be meant this raw material be can the overrange upper limit the volume particle size sieve, small grain size sieve that can not the overrange lower limit.Adopt the powder of solid resin to make wedding agent, the carbonization polycondensation takes place, make working lining produce intensity, and void content is low at 200～300 ℃.The preferred technical indicator of solid resin is: free phenol≤2.3%; Cohesive strength 〉=5.5Mpa; Fixed carbon 〉=70%; Softening temperature 〉=105 ℃.In the time of＞1200 ℃, iron powder and Sodium hexametaphosphate 99 and electrofusion magnesia powder form the high temperature solid solution body, can further improve the working lining overall performance.
Beneficial effect of the present invention: product of the present invention has the intensity height, the advantage that apparent porosity is low can improve the erosion-resisting characteristics of product, has higher work-ing life than products such as the calcareous coating of existing magnesium, magnesia coatings, can improve the longevityization of tundish, have good application prospects.
Description of drawings
Fig. 1 is a continuous casting bakie working lining mould synoptic diagram.
Embodiment
Continuous casting tundish of the present invention sees Table 1 with the formula range of dry type ramming material:
Continuous casting tundish newly developed sees Table 1 with the dry type ramming material prescription.
Table 1: continuous casting tundish dry ramming mass prescription
| Material name | Granularity/mm | Proportioning/% |
| Aggregate (electrosmelted magnesite clinker) | 5～0 | 65～75 |
| Powder (electrosmelted magnesite clinker) | ＜0.088 | 15～25 |
| The solid resin powder | ＜0.1 | 5～7 |
| Iron powder | ＜0.1 | 3～5 |
| Sodium hexametaphosphate 99 | 1～3 |
The technical requirement of solid resin is: free phenol≤2.3%; Cohesive strength 〉=5.5Mpa; Fixed carbon 〉=70%; Softening temperature 〉=105 ℃.
Embodiment
One, formulating of recipe
According to the invention shown in the table 1, allotment continuous casting tundish dry type ramming material, concrete prescription sees Table 2.
Table 2: continuous casting tundish dry ramming mass prescription
The technical indicator of electrosmelted magnesite clinker is: MgO 〉=96%; Si0
2≤ 2.2%; CaO≤2.0%.
The technical indicator of iron powder is: full iron 〉=90%.
The used resin of present embodiment is that the product type of Shengquan Group Co. Ltd., Jinan is the solid resin of PF-4014, and its index meets free phenol≤2.3%; Cohesive strength 〉=5.5Mpa; Fixed carbon 〉=70%; The requirement of softening temperature 〉=105 ℃.
The Sodium hexametaphosphate 99 index is:
Table 3: the index of the Sodium hexametaphosphate 99 that the embodiment of the invention is used
| Total phosphorus hydrochloric acid is (with P 2O 5Meter) content | ＞68.0％ |
| Nonactive phosphoric acid salt is (with P 2O 5Meter) content | ＜7.5％ |
| Water insoluble matter content | 0.05％ |
| Iron (Fe) content | 0.02％ |
| The Ph value | 5.8-7.3 |
| Mean polymerisation degree n | 10-16 |
Two, die design
According to the geomery designing mould of continuous casting tundish, see Fig. 1.
The continuous casting tundish is generally rectangular tank, the square section that last figure only draws tundish.As can be seen from Figure 1, form the gap between mould and the tundish inwall, but filling fire resisting material.The thickness in gap is the thickness of continuous casting bakie working lining.
Three, construction
Construction procedure is as follows:
(1) press the ratio requirement preparation raw material of table 2, and raw material is evenly standby with the forced stirrer thorough mixing.
(2) mould is sling, at the bottom of tundish even shakedown one deck dry type material, tight with the tup ramming.
(3) mould is put in the tundish, the gap is even around guaranteeing.From around gap location insert the dry type material toward tundish, the ramming while inserting is guaranteed tight everywhere.
(4) in mould, place many group coal gas burners, the igniting heating.Temperature in the mould is controlled at 300～350 ℃, is incubated to stop heating after 2～3 hours.
(5) behind the cool to room temperature, mould is hung away, form one deck working lining at the tundish inwall.
Four, effect
Bakie working lining by this method is made has the intensity height, and the advantage that void content is low detects index and mainly contains: baking back intensity: 〉=5MPa; Apparent porosity≤2% has the performance of flushing of anti-scour property and anti-molten steel preferably.Inner on probation through climbing steel steel plant continuous casting workshop, connect and water heat 〉=8 stoves, to the not influence of quality of molten steel.Be subjected to favorable comment, had good application prospects.
Claims (5)
1. continuous casting tundish dry type ramming material is prepared from by the following weight proportion raw material: refractory aggregate 65%～75%, refractory powder 15%～25%, additive 4%～8% and wedding agent 5%～7%.
2. continuous casting tundish dry type ramming material according to claim 1 is characterized in that described refractory aggregate is an electrosmelted magnesite clinker, granularity≤5mm.
3. continuous casting tundish dry type ramming material according to claim 1 is characterized in that described refractory powder is an electrosmelted magnesite clinker, the granularity≤0.088mm of refractory powder.
4. continuous casting tundish dry type ramming material according to claim 1 is characterized in that described additive is iron powder and Sodium hexametaphosphate 99, and wherein the amount of allocating into of iron powder is 3%～5%, and the amount of allocating into of Sodium hexametaphosphate 99 is 1%～3%.
5. continuous casting tundish dry type ramming material according to claim 1 is characterized in that described wedding agent is a solid resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103026708A CN101555155B (en) | 2009-05-27 | 2009-05-27 | Dry type ramming material for continuous casting tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103026708A CN101555155B (en) | 2009-05-27 | 2009-05-27 | Dry type ramming material for continuous casting tundish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101555155A true CN101555155A (en) | 2009-10-14 |
| CN101555155B CN101555155B (en) | 2012-01-04 |
Family
ID=41173461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103026708A Expired - Fee Related CN101555155B (en) | 2009-05-27 | 2009-05-27 | Dry type ramming material for continuous casting tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101555155B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718503A (en) * | 2012-06-29 | 2012-10-10 | 营口青花耐火材料股份有限公司 | Magnesium-calcium refractory ramming material taking dimethicone as bonding agent |
| CN103771887A (en) * | 2014-01-29 | 2014-05-07 | 上海彭浦特种耐火材料厂有限公司 | Magnesium-aluminum ramming material for RH furnace |
| CN104446528A (en) * | 2014-10-27 | 2015-03-25 | 朱小英 | Preparation method of ramming mass of ladle permanent liner |
| CN105036763A (en) * | 2015-06-23 | 2015-11-11 | 刘超群 | Method for preparing ramming mass for constructing slag dam of blast furnace trough |
| CN111499358A (en) * | 2020-04-21 | 2020-08-07 | 嵩明忠诚新材料科技有限公司 | Magnesium-chromium dry-type anti-seepage ramming material |
| CN116921660A (en) * | 2023-09-19 | 2023-10-24 | 山东国茂冶金材料有限公司 | Pouring forming die and method for tundish lining |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300043C (en) * | 2004-04-29 | 2007-02-14 | 上海彭浦特种耐火材料厂 | Electric furnace bottom dry ramming mass and its making method |
| CN100335440C (en) * | 2005-01-20 | 2007-09-05 | 海城华宇耐火材料有限公司 | High-calcium low-iron magnesian dry method ramming mass and its production method |
| CN100504265C (en) * | 2005-04-30 | 2009-06-24 | 浙江湖州红鹰企业集团有限公司 | Furnace lining ramming material of electric arc furnace bottom electrode region and its production technology |
-
2009
- 2009-05-27 CN CN2009103026708A patent/CN101555155B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718503A (en) * | 2012-06-29 | 2012-10-10 | 营口青花耐火材料股份有限公司 | Magnesium-calcium refractory ramming material taking dimethicone as bonding agent |
| CN102718503B (en) * | 2012-06-29 | 2014-01-29 | 辽宁青花耐火材料股份有限公司 | Magnesium-calcium refractory ramming material taking dimethicone as bonding agent |
| CN103771887A (en) * | 2014-01-29 | 2014-05-07 | 上海彭浦特种耐火材料厂有限公司 | Magnesium-aluminum ramming material for RH furnace |
| CN104446528A (en) * | 2014-10-27 | 2015-03-25 | 朱小英 | Preparation method of ramming mass of ladle permanent liner |
| CN105036763A (en) * | 2015-06-23 | 2015-11-11 | 刘超群 | Method for preparing ramming mass for constructing slag dam of blast furnace trough |
| CN111499358A (en) * | 2020-04-21 | 2020-08-07 | 嵩明忠诚新材料科技有限公司 | Magnesium-chromium dry-type anti-seepage ramming material |
| CN116921660A (en) * | 2023-09-19 | 2023-10-24 | 山东国茂冶金材料有限公司 | Pouring forming die and method for tundish lining |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101555155B (en) | 2012-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101913888B (en) | Pouring material for forsterite tundish slag stop wall and production process thereof | |
| CN101555155B (en) | Dry type ramming material for continuous casting tundish | |
| CN102329137B (en) | Carbon-free alumina-magnesia unburned brick and preparation method and application thereof | |
| CN101891485A (en) | Pouring material for steel ladle | |
| CN105859314B (en) | A kind of smelting molten steel equipment carbon containing gunning refractory and preparation method thereof | |
| CN101284736A (en) | Antisticking coating mixture for steel-smelting and preparation method threreof | |
| CN102101779B (en) | Pleonaste-hercynite bricks and preparation method thereof | |
| CN104446544B (en) | The production method of bottom convertor tuyere area refractory brick | |
| CN101028980A (en) | Multifunctional steel-pack batch | |
| CN102807383B (en) | Aluminum magnesium continuous casting tundish slag-retaining wall and preparation method thereof | |
| CN102765951A (en) | Magnesium-calcium-titanium-carbon brick and preparation method thereof | |
| CN102030547B (en) | Unfired pyrophyllite hot metal ladle lining material and preparation method thereof | |
| CN102161593A (en) | Light refractory castable material for heat insulation lining of cast steel plate (CPS) furnace roller | |
| CN101555154A (en) | Shock-resistant ladle bottom casting material | |
| CN101602595A (en) | Silicasol-combined corundum castable and prepare the method for abrasion-proof prefabricated component | |
| CN101580398B (en) | Ladle kerb casting material and ladle kerb preparation method thereof | |
| CN101121602A (en) | Dispersion type magnesium air brick for bakie | |
| CN101386543A (en) | Continuous casting tundish magnesia coating | |
| CN104230354A (en) | Durable alkaline spraying-repairing material and applications | |
| CN113233908A (en) | Regenerated carbon-free brick and preparation method thereof | |
| CN108083829A (en) | A kind of high tenacity insulated pouring material | |
| CN104193353B (en) | A kind of plate diamond spar matter stuffing sand and preparation method thereof | |
| CN104119084B (en) | Continuous casting steel machine liner in dundish coating | |
| CN104827020B (en) | A kind of combined type high life low cost ladle pocket block and its preparation technology | |
| CN102659432A (en) | Novel RH gunning refractory |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20160527 |