CN103551536B - A kind of tundish mist projection granulating coverture and production method thereof - Google Patents
A kind of tundish mist projection granulating coverture and production method thereof Download PDFInfo
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- CN103551536B CN103551536B CN201310486652.6A CN201310486652A CN103551536B CN 103551536 B CN103551536 B CN 103551536B CN 201310486652 A CN201310486652 A CN 201310486652A CN 103551536 B CN103551536 B CN 103551536B
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Abstract
The invention discloses a kind of tundish mist projection granulating coverture and production method thereof, comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 35%, 19%, 5%, 1.5%, 30%, 7.5%, 2%. The present invention by adding Ca contained in solder flux waste material, Si, Mg, Al, Na, F element to substitute or partly substituting the raw material that contain this type of chemical element that use in coverture in coverture formula, and the steady quality of product, can reach company standard, meet market and use. In addition solder flux breaking-up price is cheap, uses the material cost that can greatly reduce mist projection granulating coverture, remarkable in economical benefits in coverture.
Description
Technical field
The invention belongs to metallurgic auxiliary materials technical field, relate to a kind of tundish mist projection granulating coverture and production method thereof.
Background technology
China steel industry was through the develop rapidly of nearly more than ten years, and crude steel output rises to 7.16 hundred million tons in 2012 from 1.3 hundred million tons in 2000, and product quality has also obtained fast development simultaneously. but steel industry of today is being faced with the bottleneck phase of development, be the unordered expansion of production capacity on the one hand, be but the significantly downslide of industry profit margin on the other hand. be accompanied by domestic iron and steel production capacity obviously superfluous, iron and steel enterprise manages and is absorbed in tried outly, and steel profit high-growth era has been difficult to reproduce, is stepping into one longer adjustment period. each iron and steel enterprise all reduces the procurement price of the various crude fuels including coverture one after another, and the various prices of raw and semifnished materials of big-and-middle covering agent are going up always in addition, and therefore the cost efficiency of coverture manufacturing enterprise is most important to the existence of enterprise. Ge Jia coverture manufacturing enterprise all making great efforts to seek high-quality, cheap raw material substitute the raw material that existing price is higher, reduce costs, and improve the market competitiveness, the ability to ward off risks of raising enterprise. in the prior art, coverture is all with wollastonite, flyash, lime stone, dolomite, bentonite, alum clays etc. are main material, with fluorite, soda ash etc. are flux, allocating certain carbonaceous material into according to steel mill's technique again makes and produces, wherein wollastonite, lime stone, dolomite, the large percentage that fluorite uses, this type of material is exploited the destruction ecological balance in a large number, in addition this type of material belongs to non-renewable resources, price goes up year by year, add the expense of subsequent transportation and processing, make the cost of coverture high, tie up profit margin, restrict the development of enterprise, therefore find cheap substitution material and just seem most important.
And solder flux waste residue is submerged arc bead welding waste material later, its main component is: SiO2、CaO、MgO、Fe2O3、Al2O3、Na2O, F, Fe. Through periphery being used to the metallurgical equipment manufacturer investigation of solder flux, produce Harmann Berstorff, Maschinenbau GmbH of 1W cover metallurgical equipment per year for one, the solder flux waste residue producing for 1 year just has 1000 tons of left and right, and the main method of processing at present solder flux waste residue is: topple over, landfill, cause the wasting of resources, and contain Na in solder flux waste material2O, F stack or landfill process rainwater shower afterwards in the open, permeate the ground, and can cause soil and groundwater to pollute. And contained silicon, calcium, magnesium, aluminium, sodium, fluorine is element necessary in coverture in solder flux waste material, by add solder flux waste material in coverture, can substitute or partly substitute one or more that contain this chemical element raw material in coverture formula, both reduce the production cost of coverture, realized economic benefit and effectively solved again the processing problem of solder flux waste material.
Summary of the invention
The invention provides a kind of tundish with low cost mist projection granulating coverture and production method thereof.
A kind of tundish mist projection granulating coverture, comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 34～37%, 18～20%, 3～7%, 1～2%, 25～35%, 5～9%, 1.5～2.5%.
A kind of tundish mist projection granulating coverture, comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 35%, 19%, 5%, 1.5%, 30%, 7.5%, 2%.
The chemical analysis of mist projection granulating coverture for described tundish, comprises the SiO of 30.5～31.6% quality2, the MgO of 5.6～6.47 quality, the CaO of 26.3～32.07 quality, the Fe of 1.98～2.18 quality2O3, 8.53～10.3 quality Al2O3, 0.97～1.39 quality Na2The F of O, 1.36～1.51 quality, the C of 9.98～15.3 qualityGu。
A production method for mist projection granulating coverture for tundish, comprises the following steps:
1, raw material disposal: solder flux waste residue is stirred and mixed in batches with forklift, control its water content and be less than 1%, and it is processed as to-150 object fine powders, adopt magnetic method in discharging opening deironing;
2, raw material detect: to solder flux waste residue, sampling detects chemical analysis;
3, formula Design: after chemical analysis is determined, as required, utilize the formula of solder flux waste residue and other all kinds of raw material design mist projection granulating covertures;
4, batching and slurrying: solder flux raw slag material and other raw material powders, in the ratio of set component design, are added to the pulping that adds water in pulping tank. Even for ensureing slip, require the pulping time to be greater than 15 minutes;
5, mist projection granulating: by the slip stirring by plunger displacement pump pressure atomization granulation;
6, screening dedusting: particle mist projection granulating coverture is sieved with-20-80 object vibratory sieves;
7, product detects: to product, sampling detects chemical analysis, physical index;
8, qualified finished product packing warehouse-in.
The present invention by adding Ca contained in solder flux waste material, Si, Mg, Al, Na, F element to substitute or partly substituting the raw material that contain this type of chemical element that use in coverture in coverture formula, and the steady quality of product, can reach company standard, meet market and use. In addition solder flux breaking-up price is cheap, uses the material cost that can greatly reduce mist projection granulating coverture, remarkable in economical benefits in coverture. The present invention uses by effectively cheap solder flux raw slag material being added in mist projection granulating coverture formula, wherein the chemical element such as contained fluorine, potassium, silicon, calcium, magnesium, aluminium can substitute or part substitutes one or more of raw material of this chemical element that uses in mist projection granulating coverture formula, and the capability and performance of product reaches and meets technical standard. In the middle of actual production, the skilled worker of affiliated technical field manages to reduce costs in all its bearings, but due to mist projection granulating coverture production field and metallurgical casting production field far apart, can not go to do in solder flux waste residue to improve and realize turning waste into wealth of solder flux waste residue; The reasonable use that the present invention is solder flux waste residue provides new method, can effectively reduce bulk deposition and the severe contamination problem of solder flux waste residue, has good environmental benefit and social benefit. What is more important, application by solder flux waste residue in mist projection granulating coverture is produced, effectively supplemented the raw material compositions such as fluorine, potassium, silicon, calcium, magnesium, aluminium with cheap cost, reduced widely the cost of producing mist projection granulating coverture, effect is extremely remarkable.
Detailed description of the invention
Embodiment mono-
A kind of tundish mist projection granulating coverture, comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 34%, 20%, 3%, 1%, 35%, 5%, 2%.
Its chemical analysis is as following table:
| Project | Basicity | SiO2（%） | MgO （%） | CaO （%） | Fe2O3（%） | Al2O3（%） | Na2O（%） | F （%） | CGu（%） |
| Composition | 0.83 | 31.6 | 5.6 | 26.3 | 1.98 | 10.3 | 0.97 | 1.51 | 15.3 |
A production method for mist projection granulating coverture for tundish, comprises the following steps:
1, raw material disposal: solder flux waste residue is stirred and mixed in batches with forklift, control its water content and be less than 1%, and it is processed as to-150 object fine powders, adopt magnetic method in discharging opening deironing;
2, raw material detect: to solder flux waste residue, sampling detects chemical analysis;
3, formula Design: after chemical analysis is determined, as required, utilize the formula of solder flux waste residue and other all kinds of raw material design mist projection granulating covertures;
4, batching and slurrying: solder flux raw slag material and other raw material powders, in the ratio of set component design, are added to the pulping that adds water in pulping tank. Even for ensureing slip, require the pulping time to be greater than 15 minutes;
5, mist projection granulating: by the slip stirring by plunger displacement pump pressure atomization granulation;
6, screening dedusting: particle mist projection granulating coverture is sieved with-20-80 object vibratory sieves;
7, product detects: to product, sampling detects chemical analysis, physical index;
8, qualified finished product packing warehouse-in.
Embodiment mono-, by 6% wollastonite, 5% light dolomite, 3% fluorite, 5% alum clay, 1% white alkali in the solder flux waste residue replacement original formulation with 20%, adds 4.5% quartz. The cost of raw material reduces by 98.5 yuan/ton. The cost of raw material of this formula is 415.5 yuan.
After this product batch production, the on-the-spot service condition of certain iron and steel enterprise's steel-making continuous casting is as follows at home:
Technological parameter: 150 tons of ladles, treat 25-35 minutes steel time, require temperature losses of the process to be less than 8 DEG C. after tapping, this ladle covering agent is evenly added in ladle, uniform fold spreads in molten steel face, keeps the operation of liquid level black flour, must not exposed molten steel face. Treating in steel process, this coverture spreadability in ladle is good, without clustering phenomena, to change slag uniform and stable; Substantially without crust phenomenon, thermometric process is convenient. Coverture slag consumption, in 0.42Kg/ ton steel left and right, requires 040-0.45Kg/ ton steel to conform to steel-smelting technology.
Embodiment bis-
A kind of tundish mist projection granulating coverture, comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 37%, 18%, 7%, 2%, 25%, 9%, 2%.
This formula detects physics and chemistry result as table nine in laboratory:
The solder flux waste residue of embodiment dual-purpose 18% replaces in original formulation 3% wollastonite, 3% light dolomite, 3% fluorite, 5% alum clay, 3% clinker, 1% white alkali, adds 4.5% quartz. The cost of raw material reduces by 139.8 yuan/ton. The result that laboratory is detected meets technical standard of enterprise. The cost of raw material of this formula is 471.4 yuan/ton.
After this product batch production, the on-the-spot service condition of certain iron and steel enterprise's steel-making continuous casting is as follows at home:
Technological parameter: 60 tons of ladles, continuous casting joint gathers 45-50 minutes, requires every packet procedures temperature drop to be less than 5 DEG C. middle bag does not crust, and does not corrode cylinder-packing, not to molten steel recarburization. After tapping, covering agent in basis is evenly added in middle bag, uniform fold spreads in molten steel face, keeps the operation of liquid level black flour, must not exposed molten steel face. In casting process, this coverture spreadability in middle bag is good, without clustering phenomena, to change slag uniform and stable; Substantially without crust phenomenon, thermometric process is convenient. Watering, time end is rear checks that cylinder-packing erosion amount is less than working lining 50%. Coverture slag consumption, in 0.34Kg/ ton steel left and right, requires 0.30-0.40Kg/ ton steel to conform to steel-smelting technology.
Production technology is as embodiment mono-.
Embodiment tri-.
A kind of tundish mist projection granulating coverture, comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 35%, 19%, 5%, 1.5%, 30%, 7.5%, 2%.
| Project | Basicity | SiO2（%） | CaO（%） | MgO（%） | Fe2O3（%） | Al2O3（%） | Na2O （%） | F （%） | CGu（%） |
| Composition | 0.94 | 31.1 | 29.4 | 6.03 | 2.07 | 9.28 | 1.39 | 1.21 | 12.48 |
The result that embodiment detects in bis-laboratories meets technical standard of enterprise.
After this product batch production, the on-the-spot service condition of certain iron and steel enterprise's steel-making continuous casting is as follows at home:
Technological parameter: 60 tons of ladles, continuous casting joint gathers 45-50 minutes, requires every packet procedures temperature drop to be less than 5 DEG C. middle bag does not crust, and does not corrode cylinder-packing, not to molten steel recarburization. After tapping, covering agent in basis is evenly added in middle bag, uniform fold spreads in molten steel face, keeps the operation of liquid level black flour, must not exposed molten steel face. In casting process, this coverture spreadability in middle bag is good, without clustering phenomena, to change slag uniform and stable; Substantially without crust phenomenon, thermometric process is convenient. Watering, time end is rear checks that cylinder-packing erosion amount is less than working lining 45%. Coverture slag consumption, in 0.32Kg/ ton steel left and right, requires 0.30-0.40Kg/ ton steel to conform to steel-smelting technology. The cost of raw material of this formula is 436.0 yuan/ton.
Claims (4)
1. a tundish mist projection granulating coverture, its raw material comprise wollastonite and light dolomite, it is characterized in that: it comprises following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 34～37%, 18～20%, 3～7%, 1～2%, 25～35%, 5～9%, 1.5～2.5%.
2. tundish as claimed in claim 1 mist projection granulating coverture, it is characterized in that: comprise following raw material: wollastonite, solder flux waste residue, light dolomite, soda ash, flyash, bentonite are or/and clinker, bonding agent, and its quality percentage composition is respectively 35%, 19%, 5%, 1.5%, 30%, 7.5%, 2%.
3. tundish as claimed in claim 1 mist projection granulating coverture, is characterized in that: the chemical analysis of mist projection granulating coverture for described tundish, comprises 30.5～31.6% SiO by mass percentage2, 5.6～6.47% MgO, 26.3～32.07% CaO, 1.98～2.18% Fe2O3, 8.53～10.3% Al2O3, 0.97～1.39% Na2O, 1.36～1.51% F, 9.98～15.3% CGu。
4. the production method of mist projection granulating coverture for tundish as claimed in claim 1, is characterized in that: comprise the following steps:
1) raw material disposal: solder flux waste residue is stirred and mixed in batches with forklift, control its water content and be less than 1%, and it is processed as to-150 object fine powders, adopt magnetic method in discharging opening deironing;
2) raw material detect: to solder flux waste residue, sampling detects chemical analysis;
3) formula Design: after chemical analysis is determined, as required, utilize the formula of solder flux waste residue and other all kinds of raw material design mist projection granulating covertures;
4) batching and slurrying: solder flux raw slag material and other raw material powders, in the ratio of set component design, are added to the pulping that adds water in pulping tank;
Even for ensureing slip, require the pulping time to be greater than 15 minutes;
5) mist projection granulating: by the slip stirring by plunger displacement pump pressure atomization granulation;
6) screening dedusting: particle mist projection granulating coverture is sieved with-20-80 object vibratory sieves;
7) product detects: to product, sampling detects chemical analysis, physical index;
8) qualified finished product packing warehouse-in.
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| CN103551536B true CN103551536B (en) | 2016-05-25 |
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| CN104942245B (en) * | 2015-06-30 | 2016-11-09 | 河南通宇冶材集团有限公司 | A kind of mist projection granulating coverture utilizing bone coal to produce and preparation method thereof |
| CN105033207B (en) * | 2015-06-30 | 2017-06-16 | 河南通宇冶材集团有限公司 | A kind of tundish covering flux of utilization calcification baking vanadium extraction waste residue production and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE463499B (en) * | 1987-10-07 | 1990-12-03 | Ssab Svenskt Stal Ab | Covering agent for a metal smelt |
| AT407058B (en) * | 1999-04-14 | 2000-12-27 | Styromagnesit Steirische Magne | BASIC COVER AGENT FOR MELT BATH SURFACES AND METHOD FOR THE PRODUCTION THEREOF |
| CN101642800A (en) * | 2009-08-19 | 2010-02-10 | 西峡县鑫龙保温材料有限公司 | High-alkalinity high-vitrification tundish covering agent for continuous casting steel and production process thereof |
| CN101787413A (en) * | 2009-09-11 | 2010-07-28 | 马鞍山中冶钢铁冶金高新技术有限公司 | Granular heat-preserving covering flux for hot metal in steelmaking |
| CN102233413A (en) * | 2011-06-27 | 2011-11-09 | 河南通宇冶材集团有限公司 | Ultra-pure steel corrosion-free type covering agent and production method thereof |
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- 2013-10-17 CN CN201310486652.6A patent/CN103551536B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE463499B (en) * | 1987-10-07 | 1990-12-03 | Ssab Svenskt Stal Ab | Covering agent for a metal smelt |
| AT407058B (en) * | 1999-04-14 | 2000-12-27 | Styromagnesit Steirische Magne | BASIC COVER AGENT FOR MELT BATH SURFACES AND METHOD FOR THE PRODUCTION THEREOF |
| CN101642800A (en) * | 2009-08-19 | 2010-02-10 | 西峡县鑫龙保温材料有限公司 | High-alkalinity high-vitrification tundish covering agent for continuous casting steel and production process thereof |
| CN101787413A (en) * | 2009-09-11 | 2010-07-28 | 马鞍山中冶钢铁冶金高新技术有限公司 | Granular heat-preserving covering flux for hot metal in steelmaking |
| CN102233413A (en) * | 2011-06-27 | 2011-11-09 | 河南通宇冶材集团有限公司 | Ultra-pure steel corrosion-free type covering agent and production method thereof |
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