CN101433950B - Method for preparing protecting residue from recovery refining slag - Google Patents
Method for preparing protecting residue from recovery refining slag Download PDFInfo
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- CN101433950B CN101433950B CN2008102444410A CN200810244441A CN101433950B CN 101433950 B CN101433950 B CN 101433950B CN 2008102444410 A CN2008102444410 A CN 2008102444410A CN 200810244441 A CN200810244441 A CN 200810244441A CN 101433950 B CN101433950 B CN 101433950B
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Abstract
The invention relates to a method for preparing protecting slag from recovered refining slag remained in a ladle after continuous casting, which is characterized in that the recovered refining slag is natural cooled down, pulverized, subjected to iron removal and passes a 80-mesh screen; undersize is picked up and subjected to component analysis; according to the target component of the prepared protecting slag, if corresponding amount of natural mineral or fine powder of manually synthesized material containing the lacked components needs to be added, butane radical sodium xanthate and balling bonding agent in the general adding amount are added to prepare pulp with the solid content of between 50 and 70 weight percent, and the pulp is sprayed at the tower top at a hot air temperature of between 550 and 650 DEG C to prepare hollow micro balls. The invention has two characteristics: 1. the method has the simple recycling process, and the materials used to prepared the protecting slag are calculated and added only by the principle of adding what lacks and adding how much lacks, so that the component requirement on the protecting slag preparation is met; and 2. due to high added value of the product, the value of the recovered refining slag can be fully utilized.
Description
Technical field
The present invention relates to a kind of Ferrous Metallurgy comprehensive utilization of slag method, particularly a kind of recovery refining slag that remains in after finishing with continuous casting in the ladle prepares the method for covering slag.
Background technology
In the per pass operation of Ferrous Metallurgy process,, all to add various slag charges as sintering, ironmaking, converter, electric furnace, refining etc., continuous casting crystallining covering slag for example, the tundish covering slag, the ladle heat preserving agent, die casting heat preserving agents etc. are to finish metallurgical target separately.Just form corresponding metallurgical slag after these slag charges are used, for example blast furnace slag, vessel slag, electroslag, recovery refining slag and nonferrous metallurgy slag are produced 500000000 tons of steel per year at present by China, produce metallurgical slag more than 100,000,000 tons every year approximately.These metallurgical slags, it is the main solid waste of metallurgical process, only blast furnace slag has 85% utilization rate of surpassing at present, the comprehensive utilization ratio of other slag is less than 10%, a large amount of metallurgical slags, not only the potential threat to environment is self-evident, and makes that useful resources is wasted in the slag.
At present discarded metallurgical slag has mainly utilized: [1] does slag cement or cement additire.After being disclosed in modifying agents such as adding silicate, smithsonite in the slag as Chinese patent CN1014704B, as cement raw material or additive.Not only have complex process, and value is lower.[2] utilization iron and flux component wherein, in the inner reuse of iron and steel enterprise, for example as staflux, slagging agent and the agent of molten iron preliminary treatment slag etc.Openly utilize LF stove slag to make ball as Chinese patent CN1865458, return and be used as steelmaking slag agent, but this added value of product is very low.The disclosed copper smelter slag cascade utilization of Chinese patent CN1597997 method is returned step by step after the slag adding adjustment agent with back step operation output and is applied to the front operation.But this utilization can cause that impurity progressively accumulates in the slag, not only causes energy consumption to increase, but also can influence the iron and steel quality.[3] as pottery and construction material, as disclosed waste slag of steel and iron (grain slag) the factory as construction ceramic product that utilizes of Chinese patent CN1966456.Can only utilize blast furnace granulated slag, and added value is very low.[4] other purposes.Add other raw material as Chinese patent CN101259987 is open with behind the blast furnace slag crushing screening, make devitrified glass.But because devitrified glass accounts for amount of glass seldom, thereby utilization is limited, and can only use blast-furnace slag, and production technology is also quite complicated.The disclosed blast furnace granulated slag that utilizes of Chinese patent CN101264509 prepares continuous casting covering slag, adopts the cooled blast furnace slag of shrend to do raw material, by processing steps such as pulverizing, mixing, slurrying, dryings, produces continuous casting covering slag.This technology need be passed through pulverizing process, has increased production cost; And SiO in the blast furnace slag
2Content is higher, and main mine is olivine (CaOROSiO mutually
2) and solid solution, can not satisfy and produce excellent special steel with hanging down SiO
2The continuous casting covering slag of content requirement or the requirement of tundish covering slag.
Above-mentioned metallurgical slag utilizes again, not only existence utilizes complex process, utilizes the cost height in various degree, and utilize the low deficiency that waits of preparing product added value, for example cement raw material is worth and has only 300 yuan/ton, return and make steelmaking slag agent and be worth and have only 200 yuan/ton, architectural pottery is worth has only 1000 yuan/ton.
The covering slag that metallurgical process is used is usually to contain CaO and Al
2O
3Raw material mixing fritting (aluminium-calcium slag) be main base-material, cover to 100 orders (favourable mist projection granulating) through broken, thunder, allocate other component again into, make hollow microsphere through 500 ℃ of left and right sides atomizing granulating technologies then, as described in Chinese patent CN1383946, CN1526493 etc.And produce pre-melt, and not only need a large amount of natural materials, and adopt electricity or coal gas (natural gas) to make fuel, thereby cost to be higher, pre-melt market price per ton has also consumed a large amount of mineral resources and the energy more than 2300 yuan.Secondly, adopt pre-melted slag to make the covering slag of feedstock production, because the pre-melted slag raw material is that external force such as breaking is broken, Lei Meng are crushed to below 100 orders raw material, this just makes many ore deposits phase lattice structure be destroyed, ruined crystal is irregular polyhedron particles (Fig. 2), on the one hand the finished product hollow microsphere is broken, cause the reduction of result of use; On the other hand, these irregular polyhedron particles easily become the nucleating center of high melting compound, cause crusting in advance in slag blanket, be difficult for come-up and form in steel and be mingled with in molten steel, influence steel quality.Therefore with the covering slag of pre-melt preparation, exist cost higher, in the use easily crust, easily generation such as is mingled with at defective.Be generally the raising heat insulation effect, and reduce or avoid covering slag to mix with molten steel dashing, roll up slag, metallurgical protective slag is all made tiny balloon.
After recovery refining slag (recycled ladle refining slag) is meant that continuous casting of molten steel finishes, remain in this part slag in the ladle, its quantity is about 8～15 kilograms of/ton steel, yet this part slag chemical analysis is close with the pre-melted slag chemical analysis, discovers and reclaims C in the refining slag
2S crystalline phase ratio pre-melted slag also high (table 1).C
2S is on good terms in the ore deposit and increases the surface tension of slag interface, C in covering slag or the coverture
2S crystalline phase proportion is big, will help reducing steel inclusion, improves steel product quality, therefore has higher value.Yet owing to following reason, reclaim refining slag and can't directly be utilized: the direct utilization of [1] powder easily makes recovery refining slag and molten steel mix and dashes, the volume slag, and P, S and other impurity can pollute molten steel in the slag; [2] in the recovery refining slag part FeO content height is arranged, return direct utilization and will cause secondary oxidation of steel; [3] reclaim the unstable easily transformation of refining slag crystalline phase, crystal transition causes Volume Changes, and conventional temperature heating mist projection granulating crystal transition can take place and efflorescence; [4] the ore deposit phase composition and the pre-melted slag of recovery refining slag have a great difference, and the pre-melted slag ore deposit is with C
7A
12Be main, reclaim the refining slag ore deposit with C
2S is main (table 1), and extremely strong precipitability is arranged, and adopts normally used suspending agent can't make its suspension, thereby can't mist projection granulating.For above-mentioned reasons, though it is close with the pre-melted slag chemical analysis, but do not find the method for effectively utilizing, so steel mill all can only mix this part slag and other slag at present, transporting the slag field to handles, wherein only have a very little part to be used as the slag charge that returns of low value, major part is taken as waste disposal.
Table 1 reclaims refining slag and the pre-melted slag main mine is compared
Though prior art has report to adopt refining slag to make the metallurgical covering slag raw material of using.The spherical hollow type tundish covering flux of the disclosed high basicity of Chinese patent CN1970197 for example, it adopts fritting, high basicity, carbon-free raw material, by atomizing granulating technology, produces tundish covering flux, wherein has part material to adopt the LF refining slag.What on the one hand, it adopted is LF refining slag (ladle furnace refining slag) rather than used recovery refining slag (recycled ladle refining slag); On the other hand, specifically openly how the LF refining slag is added use.The chemical analysis of the disclosed alkaline tundish solvent of U.S. Pat 6179895B1 (Basic tundish flux composition), only be that the chemical analysis of alkaline tundish solvent has been done qualification, and explanation is the mixture (mixture) of various raw materials, though wherein also include the recovery refining slag, but will reclaim refining slag all directly mixes with other raw material, be added to the liquid steel water surface, can cause equally reclaiming that refining slag and molten steel mix to dash, the volume slag, reclaim that P, S and other impurity can pollute molten steel in the refining slag; Secondly, the mixture coefficient of heat conduction is big, and heat insulation function is poor, is easy to crust, to production can't be carried out.
Therefore, end when applying for a patent, though people know the chemical analysis that reclaims refining slag, and knowing it has the value of utilization, but effectively utilizes method owing to failing to find, and can only sneak in other slag, do some low value utilizations, can not give full play to its chemical composition should have effect mutually with the ore deposit.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provides a kind of and economizes in raw materials and prepare energy consumption, and refining slag is reclaimed in the high value utilization, and the recovery refining slag of preparation high value metallurgical protective slag prepares the method for covering slag.
The object of the invention realizes that main the improvement is by selecting to reclaim refining slag, add to replenish required composition, adopt the suspending agent of selecting to make suitable solid content and mist projection granulating temperature, make the tiny balloon covering slag, realizing the object of the invention.Specifically; the present invention reclaims the method that refining slag prepares covering slag; it is characterized in that reclaiming refining slag; naturally cooling efflorescence, 80 mesh sieves are crossed in deironing; extracting screen underflow is analyzed composition; according to preparation covering slag target composition, add respective amount if desired and contain the natural minerals of the scarce composition of institute or artificial synthesis material fine powder, add the butane group sodium sulfonate (C of common addition
4H
9OCSSNa) and the balling-up binding agent, making the slurry of solid content 50-70wt%, is that tiny balloon is made in 550～650 ℃ of sprayings at the cat head hot blast temperature.
The present invention is said
Naturally cooling efflorescence had both made effective ingredient obtain utilizing, and separated simultaneously and removed wherein oxious component, and remove operations such as external force fragmentation, Lei Meng from, and this is applicant's viewing test analysis result, laid the foundation for the recovery refining slag prepares the covering slag utilization.And find to reclaim refining slag in natural cooling process, the recovery refining slag that nearly 80% heat produces can the nature efflorescence.Find in the test, if reclaim the refining slag heating or cooling velocity too fast, for example the water quenching but, lattice has little time to change, and just efflorescence can not take place, directly the defective of utilization just can not get overcoming.Discover that further reclaiming refining slag efflorescence reason is when being cooled to 525 ℃, β-C takes place
2S (dicalcium silicate) crystalline phase is to γ-C
2The S crystal transition makes volume about 12% expansion occur, thereby causes its efflorescence.And C
2The S crystal transition causes the efflorescence process to be subjected to the slag composition, as: FeO, SiO
2, Al
2O
3Factor affecting such as content, cooling velocity, for example: also contain C in the vessel slag
2S ore deposit phase, but wherein FeO content is greater than 2.0%, and the slag color presents grey or black, can only form solid solution and not efflorescence during cooling; CaC in electroslag or the refining slag
2Greater than 2.0%, be commonly called as carbide slag, can not natural efflorescence; Basicity of slag is low, as blast furnace slag, and C in the slag
2The S ore deposit mutually seldom, slag can natural efflorescence; Studies show that the recovery refining slag of the natural efflorescence of energy has following characteristics: [1] slag is white in color C
2S ore deposit phase ratio is greater than 30%; [2] basicity is greater than 2.0; [3] FeO≤1.5%; [4] P, S≤0.5% (table 2).If do not meet recovery refining slag and other slag of above-mentioned condition, then can natural efflorescence, thus can go out useful composition by cooling efflorescence sieving separating naturally, getting rid of does not need part.
Refining slag composition scope (wt%) is reclaimed in the easy natural efflorescence of table 2
| ?CaO | SiO 2 | MgO | Al 2O 3 | FeO | CaF 2 | P | S |
| ?40～55 | 6～20 | 5～15 | ?15～32 | ≤1.5 | ≤5 | ≤0.5 | ≤0.5 |
Deironing, purpose are the oxides that remove to reclaim residual iron and iron in the refining slag, avoid bringing into the oxide of residual iron and iron, cause secondary oxidation of steel.
Cross 80 mesh sieve branches, one can effectively reduce FeO in the recovery refining slag, and other ore deposit phase slag and impurity, avoids causing secondary oxidation of steel and pollution.Reclaim the high part ore deposit phase of FeO content in the refining slag through anatomizing, and other ore deposit phase slag is to become fine powder by cooling off efflorescence naturally with impurity, therefore can be sieved with lower screen cloth by natural efflorescence material is crossed 80 orders; Two fine powders can be guaranteed effectively spraying preparation tiny balloon.Test is compared, and a kind of 100 mesh sieves of more preferably crossing can all separate undesirable impurity substantially, and mist projection granulating also is difficult for stopping up shower nozzle.
Adding respective amount and contain the natural minerals or the artificial synthesis material of the scarce composition of institute, mainly is according to preparation protection of goal slag composition, replenishes recovery refining slag and prepared covering slag composition and quantitative lacking.It is similar to add material and prior art for preparing covering slag; for example can be wollastonite, quartz sand, cullet, soda ash, coke, graphite, carbon black, aluminium-calcium slag, artificial synthetic wollastonite, fritting covering slag base-material, boryl material etc.; calculate to replenish and add by " what lacks what is mended; what lack what are mended " principle; adding material same as the prior art is fine powder material; its specification is better basic identical with recovery refining ground-slag specification, for example crosses the fine powder of 80 or 100 mesh sieves, helps mist projection granulating.
Butane group sodium sulfonate (C
4H
9OCSSNa), in this patent, make suspending agent and use suspended dispersed when helping reclaiming the slurrying of refining ground-slag.Contain the C that has an appointment more than 30% owing to reclaim refining slag
2S ore deposit phase, precipitability is very strong, and usually the suspending agent that adds of mist projection granulating is difficult to make it fully to suspend, and homo-effect is also undesirable, thereby is difficult to realize that the high-quality spraying makes ball.The present invention selects to adopt butane group sodium sulfonate (C through a large amount of tests
4H
9OCSSNa) make suspending agent, better solved and reclaimed the extremely strong precipitability of refining ground-slag, the defective of ball is made in difficult spraying, and its addition for example reclaims 1～1.5wt% of refining slag with mist projection granulating adding suspension dosage is suitable usually.Same as the prior art in addition; also must add binding agent during slurrying; for example cornstarch, CMC, dextrin, a kind of or several combinations such as melon starch, potato starch, syrup; to obtain the required cohesive force of balling-up; addition for example reclaims 3～5wt% of refining slag with preparation covering slag mist projection granulating is similar usually.In addition, better can also in slurrying, add deflocculant (for example sodium phosphate trimer, oxalic acid) and water reducer (for example Sodium Polyacrylate, calcium lignosulfonate, FDN3000 etc.),, help better spraying and make ball to improve the uniformity of made slurry.
Slurrying solid content 50-70wt% is for appropriately interval of ball test is made in the present invention's spraying.If test is found the slurrying solid content and exceeds this scope that composition segregation and precipitation will take place slurry, are unfavorable for spraying making ball, also are unfavorable for the stable of target composition.Test shows that the slurry solid content is 60-65wt% more preferably.
550～650 ℃ of spraying preparation tiny balloon cat head hot blast temperatures are also selected appropriate interval for test.Though reclaim refining slag cool off naturally or heating condition under, β-C can take place in the time of 525 ℃
2S (dicalcium silicate) crystalline phase and γ-C
2The phase co-conversion of S crystalline phase, volume can should have 12% expansion mutually or dwindle, and causes the tiny balloon of making to break.But experimental study of the present invention is found, feeds the hot blast heating when mist projection granulating, and controls 550～650 ℃ of granulation cat head hot blast temperatures, and then crystalline phase has little time to change, thereby has guaranteed that the tiny balloon of being produced can be because of the Volume Changes efflorescence.Further studies show that, surpass 650 ℃, γ-C will take place at hot blast temperature
2S (dicalcium silicate) crystalline phase is to α '-C
2The transformation of S crystalline phase, thus Volume Changes takes place and cause the tiny balloon efflorescence; If the cat head hot blast temperature is lower than 550 ℃, β-C can take place
2S (dicalcium silicate) crystalline phase and γ-C
2The transformation of S crystalline phase also may cause the moisture content of finished products content overproof.Therefore test determines that mist projection granulating cat head hot blast temperature is 550～650 ℃, but this interval only is the test adequate value, is not the accurate end value of mathematics, and slightly exceeding neither.Wherein the cat head hot blast temperature is more preferably 580～630 ℃.
Specific embodiment of the present invention can: the steel mill continuous casting is finished in the ladle of back residue pours cast-iron pot into and concentrate; fill the cast-iron pot of slag and deposit the nature cooling; treat to carry out deironing, screening processing after its efflorescence; the recovery refining ground-slag that screening obtains is packed; analyze composition before using; add additive; according to preparation covering slag target composition; allocate that amount of calculation sieves into contain add the natural minerals or the artificial synthesis material fine powder of composition; batching slurrying; tiny balloon is made in spraying in granulation tower, check, packing.
The present invention reclaims refining slag and prepares the covering slag method; start the recovery refining slag and utilized new way; having given full play to recovery refining slag maximum utility is worth; with it is the various covering slags and the thermal-insulating covering agent of main material preparation; casting powder for continuously casting crystallizer for example, tundish covering slag, ladle heat preserving agent; die casting heat preserving agents etc. adopt pre-melted slag to make the feedstock production covering slag than prior art.Have: realize that the maximum utility that reclaims refining slag is worth, return the last process that is used for metallurgical process than reclaiming refining slag respectively, as make the cosolvent of sintering deposit, first furnace slag etc., per ton increase additional be worth 1000 yuan above, produce the middle section steel works of 3,000,000 tons of steel per year, the annual generation reclaimed refining slag more than 30,000 tons, by 70% utilization rate, can increase added value 2,100 ten thousand every year.According to the difference of prepared covering slag, alternative amount can reach 70-100%, and annual China steel industry needs various covering slags more than 500,000 tons, can be substantially with the recovery refining slag approach exhaustion that produces, and economical, societal benefits are very huge.The not high recovery refining slag as waste disposal of benefit will be utilized originally; the metallurgy covering slag of preparation high added value, operations such as fritting, fragmentation, Lei Meng have been saved in the efflorescence of raw material nature; reduced the preparation energy consumption; only the every use of processing cost is reclaimed refining slag for one ton, just can save about 1200 yuan of costs, has also saved a large amount of natural resources; gained covering slag cost is extremely low; reduce the dust pollution of steel mill simultaneously, improved working environment, helped energy-saving and emission-reduction.Particularly reclaiming refining slag is to form micro mist by the crystal transition volumetric expansion, and broken by force without external force, ore deposit phase lattice structure remains intact; use the nature efflorescence to reclaim the covering slag of refining slag preparation; overcome powder and directly utilized the defective of bringing, heat-insulating property is better, is difficult for crust.Test shows, under the identical metallurgical technology condition, reclaim the middle bag covering slag of refining slag preparation and use contrast with the middle bag covering slag that pre-melted slag is made feedstock production, use the former to prolong the crust zero-time, it is respectively 11 hours and 7 hours that the tundish liquid level begins investing time; Improved the degree of purity of continuous casting billet, continuous casting billet sampling electroanalysis field trash total amount is respectively 9.97mg/10kg and 11.35mg/10kg, uses the former the field trash total amount 1.38mg/10kg that descended.Owing to reclaiming refining slag is the micro mist that forms by the crystal transition volumetric expansion; broken by force without external force; ore deposit phase lattice structure remains intact (Fig. 3); the particulate slyness; no irregular polyhedron particles, the covering slag of the recovery refining slag preparation of use nature efflorescence is difficult for making the finished product hollow microsphere to break; also can not cause crusting in advance forming is mingled with, more favourable to guaranteeing steel quality.Therefore by micro-amplified inspection, observe covering slag particle shape (Fig. 2,3), just can check and distinguish the covering slag that the present invention adopts the preparation of recovery refining slag, with the covering slag that adopts pre-melt preparation.The present invention reclaims refining slag and prepares the covering slag method, and having the technology of recycling simply, only needs to calculate to replenish and allocate the raw material for preparing covering slag into by " what lacks what is mended, lack what how much are mended " principle, makes composition satisfy the composition requirement of preparation covering slag; And utilize the added value of product height, and can maximumly bring into play the value that reclaims refining slag, be the present invention's two big characteristics.
Below in conjunction with four specific embodiments; the present invention is further understood in exemplary illustration and help; but the embodiment detail only is for the present invention is described; do not represent the whole technical schemes of the present invention under conceiving; therefore should not be construed as the technical scheme qualification total to the present invention, some do not depart from the unsubstantiality of the present invention's design and change In the view of the technical staff; for example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection domain of the present invention.
Description of drawings
Fig. 1 prepares the covering slag process flow diagram for the present invention reclaims refining slag;
Fig. 2 prepares covering slag tiny balloon schematic diagram for the broken pre-melt of microscopically
Fig. 3 reclaims the covering slag tiny balloon schematic diagram of refining slag preparation for microscopically the present invention.
The specific embodiment
Embodiment 1: preparation tundish covering slag, composition sees Table 3-1.To reclaim the cooled recovery refining slag of nature from steel mill, the magnetic separation de-iron with the 100 eye mesh screens extracting screen underflow that sieves, is analyzed composition and seen Table 3-2, and is basic identical with the required composition of tundish covering slag, only needs adding suspending agent, bond, and mist projection granulating gets final product.Get sieve and reclaim refining slag powder 94.3wt%, butane group sodium sulfonate (C down
4H
9OCSSNa) 1.5wt%, cornstarch 4.2wt% mixes above-mentioned raw materials, adds the slurry that water is made solid content 55.56wt%, adopts automatic frequency-conversion temperature control hot-blast stove, and control cat head hot blast temperature carries out mist projection granulating about 570 ℃.
Table 3-1 tundish covering slag composition (wt%)
| CaO | SiO2 | MgO | ?Al2O3 | FeO | CaF2 | P | S |
| 45.83 | 6.32 | 8.11 | ?26.22 | 0.57 | 3.96 | 0.33 | 0.42 |
Table 3-2 reclaims refining slag composition (wt%)
| CaO | SiO 2 | MgO | ?Al 2O 3 | FeO | CaF 2 | P | S |
| 48.6 | 6.7 | 8.6 | ?27.8 | 0.6 | 4.2 | 0.35 | 0.45 |
Embodiment 2: the preparation continuous casting covering slag, composition sees Table 4-1.To reclaim the cooled recovery refining slag of nature from steel mill, the magnetic separation de-iron with the 100 eye mesh screens extracting screen underflow that sieves, is analyzed composition and is seen Table 4-2.Mend the Plain then by lacking, add suspending agent, bond, deflocculant, water reducer, the slurrying mist projection granulating.Get sieve and reclaim refining slag powder 74.8wt%, butane group sodium sulfonate (C down
4H
9OCSSNa) 2.0wt%, calcium lignosulfonate 0.5wt%, boric acid 1.2wt%, cornstarch 3.3wt%, wollastonite 5wt%, cullet 12wt%, soda ash 1.2wt% (add raw material and also all get 100 order screenings) mixes above-mentioned raw materials, add water and make the slurry of solid content 52.63wt%, adopt automatic frequency-conversion temperature control hot-blast stove, control cat head hot blast temperature carries out mist projection granulating about 620 ℃.C+R2O is carbon and alkali metal oxide.
Table 4-1 continuous casting covering slag composition (wt%)
| CaO | SiO2 | MgO | ?Al2O3 | FeO | CaF2 | P | S | Other |
| 33.20 | 28.30 | 3.50 | ?16.65 | 0.58 | 4.20 | 0.28 | 0.35 | C+R 2O |
Table 4-2 reclaims refining slag composition (wt%)
| CaO | SiO 2 | MgO | Al 2O 3 | FeO | CaF 2 | P | S |
| 43.8 | 19.2 | 4.4 | 23.2 | 0.8 | 6.0 | 0.4 | 0.5 |
Embodiment 3: preparation ladle heat preserving agent, composition sees Table 5-1.To reclaim the cooled recovery refining slag of nature from steel mill, the magnetic separation de-iron with the 100 eye mesh screens extracting screen underflow that sieves, is analyzed composition and is seen Table 5-2), mend the Plain then by lacking, add suspending agent, bond, deflocculant, the slurrying mist projection granulating.Get sieve and reclaim refining slag powder 71.9wt%, butane group sodium sulfonate (C down
4H
9OCSSNa) 1.3wt%, cornstarch 3.8wt%, vermiculite 8%, coke blacking 15wt% (add raw material and also all get 100 order screenings), above-mentioned raw materials is mixed, add the slurry that water is made solid content 68.08wt%, adopt automatic frequency-conversion temperature control hot-blast stove, control cat head hot blast temperature carries out mist projection granulating about 550 ℃.C+R2O is carbon and alkali metal oxide.
Table 5-1 ladle heat preserving agent composition (wt%)
| CaO | SiO2 | MgO | Al2O3 | C | CaF2 | P | S | Other |
| 24.90 | 22.12 | 4.62 | 17.27 | 16.80 | 3.65 | 0.32 | 0.30 | C+R 2O |
Table 5-2 reclaims refining slag composition (wt%)
| CaO | SiO 2 | MgO | Al 2O 3 | FeO | CaF 2 | P | S |
| 45.6 | 17.8 | 5.5 | 24.7 | 0.5 | 6.9 | 0.5 | 0.4 |
Embodiment 4: preparation die casting heat preserving agent, composition sees Table 6-1.To reclaim the cooled recovery refining slag of nature from steel mill, the magnetic separation de-iron with the 100 eye mesh screens extracting screen underflow that sieves, is analyzed composition and is seen Table 4-2.Mend the Plain then by lacking, add suspending agent, bond, the slurrying mist projection granulating.Get sieve and reclaim refining slag powder 56wt%, butane group sodium sulfonate (C down
4H
9OCSSNa) 1.0wt%, cornstarch 3.0wt%, vermiculite 15wt%, coke blacking 25wt% (add raw material and also all get 100 order screenings), above-mentioned raw materials is mixed, adds the slurry that water is made solid content 51.28wt%, adopt automatic frequency-conversion temperature control hot-blast stove, control cat head hot blast temperature carries out mist projection granulating about 630 ℃.C+R2O is carbon and alkali metal oxide.
Table 6-1 die casting heat preserving agent composition (wt%)
| CaO | SiO2 | MgO | Al2O3 | C | CaF2 | P | S | All the other |
| 25.30 | 15.63 | 3.65 | 14.26 | 25.20 | 3.00 | 0.24 | 0.31 | C+R 2O |
Table 6-2 reclaims refining slag composition (wt%)
| CaO | SiO 2 | MgO | Al 2O 3 | FeO | CaF 2 | P | S |
| 49.2 | 10.4 | 4.8 | 21.2 | 0.5 | 6.0 | 0.38 | 0.4 |
To those skilled in the art; under this patent design and embodiment enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; or the substituting of known technology commonly used in the prior art; and the mutual various combination between feature; for example can also use same quadrat method; the preparation refined synthetic slag; the ferroalloy refining slag; metallurgical protective slags such as desulfurizing agent; the variation that adds mineral material and artificial synthesis material; the screening mesh size is in the variation of allowed band; these unsubstantialities are changed; can be employed equally; can both realize and basic identical function of the foregoing description and effect, launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
For convenience of description, to make ball be synonym for said mist projection granulating of the present invention and spraying.
Claims (8)
1. reclaim the method that refining slag prepares covering slag; it is characterized in that reclaiming refining slag; naturally cooling efflorescence; 80 mesh sieves are crossed in deironing, and extracting screen underflow is analyzed composition; according to preparation covering slag target composition; add if desired respective amount contain the natural minerals or the artificial synthesis material fine powder of scarce composition, make the slurry of solid content 50-70wt%, add butane group sodium sulfonate (C
4H
9OCSSNa) slurry not being precipitated, add the balling-up binding agent of energy moulding, is that tiny balloon is made in 550～650 ℃ of sprayings at the cat head hot blast temperature.
2. the method for preparing covering slag according to the described recovery refining slag of claim 1 is characterized in that the butane group sodium sulfonate is for reclaiming 1～1.5wt% of refining slag.
3. the method for preparing covering slag according to the described recovery refining slag of claim 1 is characterized in that the balling-up binding agent is for reclaiming 3～5wt% of refining slag.
4. prepare the method for covering slag according to the described recovery refining slag of claim 1, it is characterized in that also adding deflocculant and water reducer, to improve the uniformity of slurry.
5. the method for preparing covering slag according to the described recovery refining slag of claim 4 is characterized in that deflocculant is sodium phosphate trimer, oxalic acid; Water reducer is Sodium Polyacrylate, calcium lignosulfonate, FDN3000.
6. the method for preparing covering slag according to claim 1,2,3,4 or 5 described recovery refining slags is characterized in that reclaiming refining slag and crosses alternative described mistake 80 mesh sieves of 100 mesh sieves.
7. prepare the method for covering slag according to claim 1,2,3,4 or 5 described recovery refining slags, it is characterized in that the cat head hot blast temperature is 580～630 ℃.
8. prepare the method for covering slag according to claim 1,2,3,4 or 5 described recovery refining slags, it is characterized in that the slurry solid content is 60-65wt%.
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| CN104831006B (en) * | 2015-03-06 | 2017-07-07 | 江苏嘉耐高温材料有限公司 | It is a kind of to reclaim the method that refining waste residue produces molten steel covering agent |
| CN106623831B (en) * | 2016-12-27 | 2018-09-04 | 华北理工大学 | A kind of preparation method of use for laboratory high Fe content continuous casting covering slag |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88100857A (en) * | 1988-02-11 | 1988-10-26 | 河南省西峡县石墨矿 | Manufacturing process of granular protecting cinder for continuous casting |
| CN1261258C (en) * | 2003-09-19 | 2006-06-28 | 宜兴振球炉料有限公司 | Douring basket protecting slag for continuous casting and its prepn |
| CN1927502A (en) * | 2006-09-29 | 2007-03-14 | 唐山钢铁股份有限公司 | Low-carbon steel protecting slag for continuous casting of sheet billet and preparing method thereof |
| CN1951601A (en) * | 2006-11-20 | 2007-04-25 | 彭绍权 | Production method of heating type hollow spherical-shape continuous casting protecting slag |
| CN101049629A (en) * | 2007-05-17 | 2007-10-10 | 武汉钢铁(集团)公司 | Method for preparing continuous casting protecting slag by using continuous casting sheet iron slag |
| CN101264509A (en) * | 2008-04-30 | 2008-09-17 | 东北大学 | Method for preparing continuous casting protection slag from using blast furnace water slag |
-
2008
- 2008-12-03 CN CN2008102444410A patent/CN101433950B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88100857A (en) * | 1988-02-11 | 1988-10-26 | 河南省西峡县石墨矿 | Manufacturing process of granular protecting cinder for continuous casting |
| CN1261258C (en) * | 2003-09-19 | 2006-06-28 | 宜兴振球炉料有限公司 | Douring basket protecting slag for continuous casting and its prepn |
| CN1927502A (en) * | 2006-09-29 | 2007-03-14 | 唐山钢铁股份有限公司 | Low-carbon steel protecting slag for continuous casting of sheet billet and preparing method thereof |
| CN1951601A (en) * | 2006-11-20 | 2007-04-25 | 彭绍权 | Production method of heating type hollow spherical-shape continuous casting protecting slag |
| CN101049629A (en) * | 2007-05-17 | 2007-10-10 | 武汉钢铁(集团)公司 | Method for preparing continuous casting protecting slag by using continuous casting sheet iron slag |
| CN101264509A (en) * | 2008-04-30 | 2008-09-17 | 东北大学 | Method for preparing continuous casting protection slag from using blast furnace water slag |
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