A kind of method and system of continuous seepage nanocrystalline strip
Technical field
The invention belongs to the ultra-thin band preparation field of nanocrystalline pressurization, be specifically related to a kind of method and system of continuous seepage nanocrystalline strip.
Background technology
Nanocrystallinely be widely used due to the soft magnet performance of excellence, it can be made into magnetic core and be applied to current transformer, precision current transformer, common mode inductance, high power switching power supply, inverter, magnetic amplifier, filter inductance, earth leakage circuit-breaker, high frequency transformer, high-frequency converter, high frequency choke coil etc.Iron-base nanometer crystal alloy, based on Fe element, adds a small amount of Nb, Cu, Si, B element formation alloy, forms a kind of amorphous material through fast solidification technology.As nanocrystalline strip be through melting molten steel with very high speed cooling formed strip, common iron based nano crystal raw material are ingot iron, metallic silicon, cathode copper, ferro-niobium, ferro-boron.
The production method of nanocrystalline strip is: first melted in a furnace according to a certain ratio by alloy raw material, then and insulation calm through tundish, flow in spray bag preheated in advance, finally by a narrow and small gap bottom spray cup, flow on atwirl chill roll, be cooled to solid-state throwing away fast, form nanocrystalline strip.Molten steel temperature to nanometer by most important for the production of band, wherein the heating of spray bag and heat insulation effect directly affect the temperature flowing to molten steel on chill roll, preparation quality and the serviceability that all can affect band too high or too low for temperature, visible spray bag heating link plays very important effect in whole band process processed.
In view of being conducive to, raising is Fe-based amorphous, the quality of nanocrystalline strip product and the stability of guarantee properties of product, applicant obtains a utility model patent, Authorization Notice No. is CN203738017 U, the operation principle of the pressure spray band bag that this patent provides is: the molten steel in melting furnace flows in crucible by connecing steel funnel, treat that the liquid level in crucible reaches certain liquid level, in crucible, argon gas or nitrogen is passed into by the pore in connecting screw rod, gas to enter in crucible above molten steel liquid level along gas motion track, when gas pressure reaches desired value, connect molten steel liquid level in steel funnel and rise to constant position.Now, in this spray bag crucible, pressure reaches balance.Open stopper, the molten steel in crucible flows in spray cup, and flows out on the crystallizer of High Rotation Speed by the spray seam of spray cup bottom, is frozen into the strip of thickness at 25-30m instantaneously.Along with the carrying out of system band, the molten steel liquid level in crucible reduces, and the molten steel position connect under the condition of constant voltage in steel funnel also declines thereupon.In order to make level being constant in crucible, docking steel funnel carries out continuous steel, makes the magnitude of recruitment of molten steel in crucible equal to spray the tap of seam, thus realizes band processed continuously.
The spray bag of the crucible in above-mentioned patented technology, composition such as device such as spray cup, heat-insulation layer etc. is more suitable for the continuous seepage of amorphous band, in the production of nanocrystalline strip, because the molten steel temperature of nanocrystalline requirement is slightly low, molten steel amount is less, crucible and the integrated spray packaging of spray cup is often adopted to put, heating wire is arranged in its wall by this spray bag, directly the molten steel in spray bag is heated and is incubated, building the larger heat-insulation layer of specification without the need to expending material resources manpower, the needs of nanocrystalline molten steel temperature can be ensured.Because Elema volume is not suitable for more greatly the heating of nanocrystalline spray bag, and though the Medium frequency induction graphite cannula efficiency of heating surface is high, but it is expensive and easily oxidized, consume energy in heating process more, therefore select the mode arranging heating wire when building spray bag in wall to heat can either to meet need of production and have economize energy, be preferred plan of the prior art.The same with the production process of CN203738017 U patented technology when using this spray bag to produce nanocrystalline, level being constant in spray bag, and continuous steel is carried out to it, make the magnitude of recruitment of molten steel equal to spray the tap of seam, thus realize band processed continuously.This nanocrystalline production process can ensure the continuous seepage of band when links all runs well, but the problem such as quality of molten steel, spray band quality, the damage of spray cup often occurs in band process processed, once any one link generation deviation, just need breaks in production, and restart spray bag heating system.
Example is replaced by spray bag damage needs, concrete operations are: first interrupt noting molten steel in spray bag and interrupt spray bag simultaneously and spray molten steel on crystallizer, after treating that molten steel temperature reduces, residue molten steel in spray bag is removed, spray bag is removed, then reconstructs spray bag, the electric-heating-wire-heating finally will newly sprayed in bag, make spray bag temperature from room temperature be heated to temperature required after, continue produce.
Visible, cause producing interruption owing to often there are abnormal conditions in band process processed, therefore above-mentioned breaks in production, the process that restarts also occur often, only lower the temperature, unpack, build bag, heat the man-hour that this several large step just needs to expend 2-3 hour, serious waste resource, reduce production efficiency.
Summary of the invention
For overcoming above-mentioned defect of the prior art, the object of the present invention is to provide a kind of method of continuous seepage nanocrystalline strip, it, when producing generation and being abnormal, also without the need to breaks in production, has the advantages that to economize on resources, enhance productivity.Another object of the present invention is to the system that a kind of continuous seepage nanocrystalline strip is provided.
Technical scheme of the present invention is: a kind of method of continuous seepage nanocrystalline strip, it comprises spray bag on line and sprays bag heating link under heating link and line, and two links all adopt and can wrap with spray the heating jacket be separated and heat, heating jacket on line in spray bag heating link is positioned on strip producing line, for heating jacket on line, under heating jacket under line in spray bag heating link is positioned at strip producing line, it is heating jacket under line; Concrete steps are:
Step one, melts link: melted in a furnace according to a certain ratio by alloy raw material, flows into tundish calmness and insulation; Preheating is carried out respectively with the spray bag in the inner of heating jacket contraposition under heating jacket on line and line;
Step 2, spray bag heating link on line: molten steel is injected from tundish the spray bag heating and thermal insulation on line in heating jacket, reach certain liquid level and stop;
Step 3, system band link: molten steel wraps narrow and small gap, one, bottom by spray, flows on atwirl chill roll, is cooled to solid-state throwing away fast, forms nanocrystalline strip;
Step 5, spray bag heating link under line: molten steel is injected from tundish the spray bag heating and thermal insulation in heating jacket under line, reach certain liquid level and stop;
Step 6, link on line is turned: when the molten steel in heating jacket on line all flows out formation nanocrystalline strip or occur that producing abnormal needs interruption flows out under line, the spray bag being positioned at heating jacket on line is shifted out, and the spray bag being positioned at heating jacket under line is moved into heating jacket on line;
Step 7, supplements link under line: load spray bag, preheating in online lower heating jacket; Be cycled to repeat step 5, six, seven successively, realize the continuous seepage of nanocrystalline strip.
Optimize, when the molten steel in heating jacket on line all flows out formation nanocrystalline strip, the spray bag loaded in online lower heating jacket in step 7 is the spray bag shifted out in heating jacket line in step 6.
Optimize, when occurring that production needs the molten steel in heating jacket on line to interrupt flowing out extremely, the spray bag loaded in heating jacket under online in step 7 is that spray for subsequent use is wrapped.
Optimize, on line under heating jacket and line heating jacket inner homogeneous wire hole is set, inner surface arranges diathermanous hole, and resistance wire is successively through wire hole, and after to resistance wire energising, heat passes to the spray bag being positioned at heating jacket by diathermanous hole.
Optimize, on line, under heating jacket and line, heating jacket is made by carbofrax material.
The system of a kind of continuous seepage nanocrystalline strip provided by the invention: it comprises smelting furnace, tundish, spray bag heater and chill roll; Spray bag heater comprise line sprays bag heater and line under spray bag heater, and two devices include spray bag and can wrap with spray the heating jacket be separated, heating jacket line sprayed in bag heater is positioned on strip producing line, for heating jacket on line, under the heating jacket sprayed under line in bag heater is positioned at strip producing line, it is heating jacket under line.
Optimize, on line under heating jacket and line heating jacket inner homogeneous wire hole is set, inner surface arranges diathermanous hole, and resistance wire is successively through wire hole, and after to resistance wire energising, heat passes to the spray bag being positioned at heating jacket by diathermanous hole.
Optimize, on line, under heating jacket and line, heating jacket is made by carbofrax material.
Optimize, also comprise spray for subsequent use bag, when occurring that production needs the molten steel in heating jacket on line to interrupt flowing out extremely, by heating jacket under spray packaging lambda line for subsequent use.
Beneficial effect of the present invention is:
1, production method provided by the invention and production system, bag heater is sprayed under employing heating jacket and the separable line of spray bag spray bag heater and line, no matter during when normal production or produce there is exception, continuous seepage can both be realized, especially when producing generation and being abnormal, without the need to breaks in production, only need to supplement link by turning under line on line under link and line, continuous seepage can be realized, save and wait for molten steel cooling, remove residue molten steel, unpack, reconstruct spray bag, reheat the time of spray bag, have and economize on resources, the feature of enhancing productivity.
2, when the molten steel in heating jacket on line all flows out formation nanocrystalline strip, the spray bag loaded in online lower heating jacket in step 7 is the spray bag shifted out in heating jacket line in step 6, to be reached the standard grade lower cycle alternation by the line of two spray bags, the continuous seepage of nanocrystalline strip can be realized, without the need to carrying out continuing continuous steel to spray bag, making the magnitude of recruitment of molten steel equal to spray the tap of seam, ensureing level being constant in spray bag, decrease control point, be convenient to production operation.
3, when occurring that production needs the molten steel in heating jacket on line to interrupt flowing out extremely, the spray bag loaded in online lower heating jacket in step 7 is spray for subsequent use bag, by adding of spray bag for subsequent use, maintain continuous seepage, the time of the spray bag damaged without the need to making reparation or reconstruction spray bag takies the production time, improves production efficiency.
4, the present invention adopts two to overlap independently heater to carry out preheating insulation to the spray bag being positioned at heating jacket under heating jacket and line on line respectively, and then when can make spray bag spray band on line, spray bag preheating insulation under line, both carry out simultaneously, have saved the production time.
5, on line under heating jacket and line heating jacket by wire hole, diathermanous hole with heat spray bag through the resistance wire of wire hole successively, by resistance wire being arranged in the heating jacket independent of spray bag, can either meet production again can economize energy, spray can also be realized to wrap the operation be separated with heating jacket, be conducive to heating jacket to reuse, the line being conducive to realizing spray bag is reached the standard grade lower rapid translating.By wire hole, the homogeneous heating that can realize spraying bag in heating jacket is evenly set.
6, on line, under heating jacket and line, heating jacket is made by carbofrax material, and material is simple and easy to get, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the sectional view of the spray bag heater that the present invention adopts;
Fig. 2 is the top view of the spray bag heater that the present invention adopts.
1, resistance wire; 2, heating jacket; 3, diathermanous hole; 4, wire hole.
Detailed description of the invention
The present invention is illustrated below in conjunction with accompanying drawing.
The technical scheme of present embodiment is: a kind of method of continuous seepage nanocrystalline strip, it comprises spray bag on line and sprays bag heating link under heating link and line, and two links all adopt and can wrap with spray the heating jacket be separated and heat, heating jacket on line in spray bag heating link is positioned on strip producing line, for heating jacket on line, under heating jacket under line in spray bag heating link is positioned at strip producing line, it is heating jacket under line; Concrete steps are:
Step one, melts link: melted in a furnace according to a certain ratio by alloy raw material, flows into tundish calmness and insulation; Preheating is carried out respectively with the spray bag in the inner of heating jacket contraposition under heating jacket on line and line;
Step 2, spray bag heating link on line: molten steel is injected from tundish the spray bag heating and thermal insulation on line in heating jacket, reach certain liquid level and stop;
Step 3, system band link: molten steel wraps narrow and small gap, one, bottom by spray, flows on atwirl chill roll, is cooled to solid-state throwing away fast, forms nanocrystalline strip;
Step 5, spray bag heating link under line: molten steel is injected from tundish the spray bag heating and thermal insulation in heating jacket under line, reach certain liquid level and stop;
Step 6, link on line is turned: when the molten steel in heating jacket on line all flows out formation nanocrystalline strip or occur that producing abnormal needs interruption flows out under line, the spray bag being positioned at heating jacket on line is shifted out, and the spray bag being positioned at heating jacket under line is moved into heating jacket on line;
Step 7, supplements link under line: load spray bag, preheating in online lower heating jacket; Be cycled to repeat step 5, six, seven successively, realize the continuous seepage of nanocrystalline strip.
Wherein, when the molten steel in heating jacket on line all flows out formation nanocrystalline strip, the spray bag loaded in online lower heating jacket in step 7 is the spray bag shifted out in heating jacket line in step 6.
Wherein, when occurring that production needs the molten steel in heating jacket on line to interrupt flowing out extremely, the spray bag loaded in heating jacket under online in step 7 is that spray for subsequent use is wrapped.
Wherein, on line under heating jacket and line heating jacket inner homogeneous wire hole is set, inner surface arranges diathermanous hole, and resistance wire is successively through wire hole, and after to resistance wire energising, heat passes to the spray bag being positioned at heating jacket by diathermanous hole.
Wherein, on line, under heating jacket and line, heating jacket is made by carbofrax material.
The system of a kind of continuous seepage nanocrystalline strip that present embodiment provides: it comprises smelting furnace, tundish, spray bag heater and chill roll; Spray bag heater comprise line sprays bag heater and line under spray bag heater, and two devices include spray bag and can wrap with spray the heating jacket be separated, heating jacket line sprayed in bag heater is positioned on strip producing line, for heating jacket on line, under the heating jacket sprayed under line in bag heater is positioned at strip producing line, it is heating jacket under line.
Wherein, on line under heating jacket and line heating jacket inner homogeneous wire hole is set, inner surface arranges diathermanous hole, and resistance wire is successively through wire hole, and after to resistance wire energising, heat passes to the spray bag being positioned at heating jacket by diathermanous hole.
Wherein, on line, under heating jacket and line, heating jacket is made by carbofrax material.
Wherein, also comprise spray for subsequent use bag, when occurring that production needs the molten steel in heating jacket on line to interrupt flowing out extremely, by heating jacket under spray packaging lambda line for subsequent use.