CN1048435C - Method and apparatus for producing metal strip - Google Patents
Method and apparatus for producing metal strip Download PDFInfo
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- CN1048435C CN1048435C CN93121394A CN93121394A CN1048435C CN 1048435 C CN1048435 C CN 1048435C CN 93121394 A CN93121394 A CN 93121394A CN 93121394 A CN93121394 A CN 93121394A CN 1048435 C CN1048435 C CN 1048435C
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Abstract
The present invention relates to a method and an apparatus for casting molten lead alloy into a metal strip for an electrode plate. A cool casting surface of a rotating drum makes a molten material cast into the metal strip on the casting surface by a molten metal tank in a tundish; the tundish is provided with a graphite flange insertion piece which is matched with the casting surface to form a molten material tank. The tundish comprises a conveying chamber, a returning chamber and a rotary current chamber, wherein the conveying chamber and the rotary current chamber eliminate the turbulent current of the molten material. The returning chamber is provided with a vertical adjustable weir separating the returning chamber and the rotary current chamber. The weir is used for controlling the surface height of the molten material tank in the flange insertion piece and makes the molten material split to the returning chamber. A low antimony-lead alloy is the best choice. The produced electrode plate has the characteristic of good electrochemistry.
Description
The present invention relates to the deposite metal is cast into the method and apparatus of continous metal strip, be specifically related to plumbous and the big metal in freezing range are cast into the continous metal strip that battery electrode plate is used.
For many years, the producer of lead-acid battery has used various metals to prepare battery lead plate.The system of rerolling formed the method for casting on the rotating cylinder that rotates in method, belt continuous metal cast process, biobelt continuous metal cast process, bitubular casting and the melted alloy groove of band shape rolled parts after the casting method of these alloys comprised single face shape casting method, block, and promptly so-called " melt extraction solidification method " or " soaking casting ", last a kind of method can directly be produced the alloy band from the deposite metal.
The casting of soaking of success relates to circumference to the casting rotating cylinder of cooling and rotates the zone pass through one level and smooth no slag deposite metal stream is provided.Must extract heat with even velocity along the width of metal tape, so that produce the metal tape that has uniform thickness along rotating cylinder.Soak casting and be suitable for casting pure lead and casting solidification interval little for example plumbous calcium of metal or lead-calcium-tin alloy.In order to make battery electrode plate with the foundry goods band, the expansion lead alloy band also forms the grid that battery electrode plate is used.Other method of producing battery lead plate comprises the shape of directly alloy being cast battery lead plate and with rotating cylinder cast electrode plate, this rotating cylinder has the surface corresponding to required battery lead plate shape.
No matter be that alloy compositions or casting method all are the exercise questions of many patents.In U.S. Patent No. 3,926,247 and No.3,858, a kind of successful methods of utilizing melt to extract solidification method casting lead or plumbous calcium or lead-calcium-tin alloy band is disclosed in 642, and in U.S. Patent No. 4,291,433, No.4,297, the expansion that the lead-acid battery battery lead plate uses and the method for shaped casting band made then disclosed in 866 and No.4,315,356.
Now a lot of automobile batteries producers like making positive electrode plate in the battery maintenance not with low-antimony-lead alloy.These producers claim, with other metal for example lead-calcium alloy compare, low-antimony-lead alloy has long battery life.The low antimony that battery positive plate is used generally contains antimony 0.5% to 4.0% along alloy.For the automobile start battery, the weight percentage of the antimony that alloy is common is about 1.0% to being no more than 2.5%.Antimony content is lower than at about 1.0% o'clock, and the saturated circulation ability of the battery electrode plate of doing with this alloy reduces.For castability, mechanical performance and the electrochemical properties that strengthens antimony alloy, usually add one or more other alloying elements.These other alloying elements comprise arsenic, copper, tin, sulphur, selenium, tellurium, silver, cadmium, bismuth, calcium, magnesium, lithium and phosphorus, the weight of the scope of its amount from 0.001% to 0.5% lead.For example sulphur, copper, selenium, tellurium and tin are made grain refiner can to add many other alloying elements.
Consider in order to make battery electrode plate have satisfied structure and performance, must add one or more lattice fining agents, the industrial use of accepting this fining agent to a great extent.Therefore now, one or more this grain refiners in most of low-antimony-lead alloys, have been infiltrated.
When 10% the method that adopts rolling for example to be rolled down to former slab thickness with the slab casting alloy components of low-antimony-lead alloy is made battery electrode plate, the battery lead plate of making of this rolled metal band is when it is used as positive electrode, because corrosion resistance is low and undesirable battery lead plate expansion takes place, thereby the life-span is low.So this product does not use in industry.So battery positive plate adopts gravity casting method (being called the single face shape casting method again) to make now, this positive plate is very thick very heavy, hole is arranged, and micro-structural is inhomogeneous, this has quickened corrosion, and the generating electrodes plate expands and makes the high damage by water consumption of generation in the battery easily.All these characteristics have shortened battery life.Yet gravitation casting method seemingly is used to make the unique method of low antimony positive electrode plate on commercial scale.
In prior art, point out, be used for not safeguarding that the low-antimony-lead alloy of lead-acid battery battery lead plate can cast with soaking casting on a rotating cylinder, perhaps on rotating cylinder, cast with battery lead plate shape face, perhaps in a former has the mold of battery lead plate shape, carry out die casting, perhaps cast and use the punch process method to process that (for example U.S. Patent No. 3,789 with gravitation casting method, 909, No.3,789,910, No.4,455,724 and No.4,456,579).The applicant attempts to produce metal tape with soaking casting, but not success of this attempt, up to today this method do not use in industrial acquisition.Equally,, have the method for casting on the rotating cylinder of battery lead plate shape face not by industrialization, serious problem has taken place because the battery performance of the positive electrode plate that the low antimony lead foundry goods of casting in this way does is housed at one for positive plate.
Can in order to obtain uniform aplitic texture, after rolling, and then control temperature (U.S. Patent No. 4,498,519) with twin-roll casting casting low-antimony-lead alloy band.As everyone knows, refining antimonial lead alloy was softer originally, needed to use the heat treatment hardening agent, so that be suitable for being used for making battery lead plate.In U.S. Patent No. 1,674,954-1 has narrated in 674,959,4,629,516 and 4,753,688 and has comprised the various heat treatment methods of quenching or cooling and burin-in process.In addition, in U.S. Patent No. 4,629, disclose in 516 and No.4,753,688 with rolled alloy, the method that adds thermalloy and the hardenable alloys lead-antimony alloy that hardens, heating process wherein makes alloy form recrystallization texture, and this structure is hardened when aging.Tensile strength of alloys after the processing has improved.This kind of closing comprises 0.5% to 6% antimony, 0.002% to 1% arsenic, and surplus is plumbous.Produce the purifying metal band with rolling method of closing, metal tape is heated, and hardens then.Yet etching problem and unwanted expansion have also appearred in the battery electrode plate of producing according to these patents, and this has shortened the life-span of battery.Current same lead-antimony alloy, lead-calcium alloy or lead-calcium-tin alloy are made cell negative plate, adopt gravitation casting method or adopt the method for expanding plumbous calcium or lead-calcium-tin alloy band.
Low-antimony-lead alloy can not be cast on the smooth rotating cylinder with soaking casting owing to following 2 major reasons.At first, the antimony in alloy makes the alloy of fusing show very wide freezing range, and in antimony content was 1% to 2.5% optimum range, the freezing range was up to 60 ℃.Secondly, gravity has destroyed the continuity of deposite metal on rotating cylinder.What the result can not form the curing of solidifying has a uniform thickness metal strip.Especially true when the antimony content of alloy is 1.0%-1.5%, in this antimony content scope, the freezing range of alloy is maximum.
Other method of casting alloy band is by being positioned at above the rotating cylinder or tundish, casting pool or the casting container of side are cast on the rotating cylinder of cooling, promptly so-called " melt traction " method.Though the molten material traction method of cast metal band is used to produce aluminium strip, aluminum alloy strip, copper strips, copper alloy belt and steel band,, as far as we know, this method is not also at the industrial big lead alloy band in production freezing range, for example the low-antimony-lead alloy band of being used for.
We have been found that for example low antimony alloy of the big metal of metal, particularly freezing range now, can successfully be cast as metal tape with melt traction method and equipment of the present invention under controlled working environment.The metal tape foundry goods of the alloy that the freezing range is big also must further be heat-treated, for example the heat treatment of low-antimony-lead alloy band.We find that also the heat treated metal band can successfully be spread and shaping, makes the grid electrode plate of using in the positive electrode plate, and the kind electrode plate has good electrochemical properties.We also find, have good characteristic can be used for the metal tape of battery lead plate can be with the low-antimony-lead alloy casting that does not contain conventional grain refining alloy element.Particularly for positive electrode, weight by lead contains antimony about 0.5% to about 4%, reasonable is to contain antimony about 1.5% to about 3.0%, and best is to contain antimony about 1.5% to low-antimony-lead alloy about 2.0% and that contain a spot of one or more other alloying elements can be cast on the rotating cylinder of a cooling with the deposite metal in the tundish with melt traction method.Other alloying element is arsenic and tin preferably, need not grain refiner.Adding arsenic and tin are electrochemical properties and the mechanical properties in order to improve lead-antimony alloy.The amount of arsenic and tin is respectively about 0.1% to 0.2%, in about scope of 0.2% to 0.7%.
The rotating cylinder and the tundish that comprise cooling with the equipment of melt traction method cast metal band.Tundish transmits one deck deposite metal to the casting surface of rotating cylinder, and these deposite metals are pulled on the surface of ground rotating cylinder, cools off then and solidifies.Tundish is a container, comprises inlet, overflow outlet, overflow mechanism, flow control apparatus and cast construction.Overflow mechanism guarantees that the deposite metal of the flange portion in cast construction has controlled apparent height in whole casting process.Flow control apparatus guarantees to eliminate turbulent flow basically in the deposite metal of flange portion, so that improve thickness measure control and reduce hole.
Cast construction comprises the flange insert that profile conforms to the drum surface shape.The rotating cylinder of cooling rotates, and from the deposite metal of tundish traction controlled quatity to the surface of its cooling, sharply solidify the deposite metal on this surface, forms the solid metal band with preliminary dimension.The diameter of rotating cylinder, rotating speed, surface smoothness.The temperature of melt and apparent height all are controlled in surface temperature and the tundish, and determine the thickness of casting speed and metal tape thus.The surface the most handy glass ball sandblast of rotating cylinder is handled, so that form the nucleating point that solidify many deposite metals.After casting or winding, metal tape can also be handled.According to the alloy of being cast, can not want this processing yet.This processing for example heat treatment makes the grid that metal tape can be processed into expansion with making battery positive electrode plate, and not damaged on a large scale.So the battery lead plate of production compares with the battery lead plate of producing with conventional gravitation casting method, shows excellent characteristic, has improved resistance to corrosion, has reduced the formation of gas.
Adopt same method and apparatus, can also use lead-antimony alloy, lead-calcium alloy or lead-calcium-tin alloy to make negative electrode plate.
The feasible positive electrode that can produce automotive battery with the low-antimony-lead alloy high-speed and continuous of melt traction method with premium properties.This method also makes might produce imporous thin battery electrode, and this has realized that also battery product has higher energy and power density and improved charge-discharge performance.The extra weight of battery is brought extra cost.Because the market pressure of the cold battery of producing of sale, the battery lead plate number of each battery increases, so to special instructions for use, battery electrode plate should be light as far as possible, manufacturing cost is reduced to minimum.
Therefore, a free-revving engine of the present invention has provided and has a kind ofly adopted melt traction method optionally and controllably to cast the method and apparatus of metal strip with the big metal in freezing range, this melt traction method make might the improvement environmental condition with reduce production costs.Another aspect has provided the method for making positive plate with low-antimony-lead alloy, and this low-antimony-lead alloy has excellent characteristic as the battery lead plate of aluminic acid battery.
A further object of the present invention has provided a kind of continuous melt traction method of high-speed production positive-negative electrode plate, and production and battery lead plate have improved electrochemical properties when being used for lead-acid battery.
The invention provides a kind of method from molten metal bath casting metals band, casting metal strip roughly is positioned on the cooling casting surface of moving that casts the rotating cylinder first half at one, and this method comprises:
The apparent height of control molten metal bath;
Above-mentioned casting surface is moved up, by above-mentioned molten metal bath, so that deposit one deck deposite metal thereon;
Cool off above-mentioned deposite metal, the metal tape on casting surface is solidified;
Stripping metal band from the casting surface;
Form a tundish, this tundish comprises that a pond presses close to the deposite metal of above-mentioned casting surface, above-mentioned tundish has conveying chamber, return chamber and turn of tidal stream chamber, also has a front opening of pressing close to casting surface, it is characterized in that a graphite flange insert presses close to above-mentioned front opening and removably be fixed in the tundish, it has the base plate and the sidewall of the tundish front opening that is suitable for fitting, above-mentioned thus melt can seepage, above-mentioned graphite flange insert has the front opening that is formed by flange insert base plate and flange insert sidewall, this base plate and sidewall match with the casting surface of pressing close to them, thereby can comprise above-mentioned deposite metal, a pond in the flange insert.
The present invention also provide a kind of by the molten metal bath in the tundish at a casting rotating cylinder direct equipment of cast metal band on the casting surface of the cooling of pressing close to this pond of the first half roughly, this equipment comprises: a rotating cylinder tumbler is used to make the casting surface of cooling to move up, pass molten metal bath, so that make casting of metals on the casting surface of cooling; Also comprise tundish, tundish comprises conveying chamber, return chamber and turn of tidal stream chamber, and these chambers have the passage that above-mentioned chamber is communicated in proper order, it is characterized in that: above-mentioned tundish has the front opening of casting surface; Have with a flange insert and to be suitable for pressing close to the tundish front opening and to be inserted into base plate and opposing sidewalls in the tundish, above-mentioned flange insert has the front opening that is formed by bottom flange plate and sidewall, this base plate matches with casting surface with sidewall, thereby can in the flange insert, comprise the above-mentioned deposite metal that a pond has the certain surface height, above-mentioned molten metal bath communicates with the turn of tidal stream chamber pressure, thereby the apparent height in pond is identical with the apparent height of deposite metal in the turn of tidal stream chamber in the flange insert; Be used for being controlled at the apparent height of the above-mentioned molten metal bath of turn of tidal stream chamber with a control device, thus the apparent height in the control flange insert.
Referring now to description of drawings the present invention, accompanying drawing illustrates most preferred embodiment of the present invention, among the figure:
Fig. 1 is a schematic diagram, and the Strip casting production line from the tundish to the tape handler is shown;
Fig. 2 is the longitudinal cross-section side view of tundish and casting cylinder;
Fig. 3 is the view in transverse section of casting device shown in Figure 2.
According to the method for the present invention that will illustrate, can become with the big metal in freezing range Merit casts out the lead band for the manufacture of the lead-acid battery positive electrode plate. These alloys comprise low antimony lead Alloy. Although the following description illustrates for low-antimony-lead alloy, should be understood that, this Bright method equally also is suitable for casting for example band of pure lead and other metal.
Require the low-antimony-lead alloy of the used in battery of low levels of maintenance to contain by weight that the antimony amount is little to be arrived 0.5% to approximately being no more than 4%. This is antimony that it is generally acknowledged the maximum that is suitable for Vehicular battery Content range. For the battery that does not require maintenance, the antimony content of alloy by weight 1% to In 3.5% the scope. Antimony content in battery electrode plate is just too low when following about 1% , battery just can lose the necessary characteristic of saturated circulation (deep cycling). At the battery electricity Antimony in the pole plate is about 2% when above, and battery is emitted a large amount of gases usually. Yet the present invention produces The aplitic texture of product so that can use contains the antimony amount up to about 3% metal and can be not remarkable Increase venting. Therefore the antimony content scope of alloy of the present invention about 1% to about 3.0% relatively Good, better the antimony content scope is about 1.5% to about 2.2%. Best antimony content scope is pressed The weighing scale of alloy is at last from about 1.5% to 2.0%, and surplus is plumbous and subsidiary impurity.
Low-antimony-lead alloy can also comprise one or more alloying elements in addition, for example copper, tin, Sulphur, selenium, tellurium, silver, cadmium, bismuth, calcium, magnesium, lithium or phosphorus, the content range of each (by weight) From about 0.001% to 0.5%. These elements can be added into various reasons. Although use Method of the present invention can successfully be cast the low-antimony-lead alloy that does not add other alloying element, But preferably a certain amount of arsenic and tin are joined in the low-antimony-lead alloy to improve the castable of alloy Property and flowability are boosted productivity, and are improved the characteristic of institute's Cast Strip material. The weight percent of arsenic is dense The degree scope is from about 0.1% to 0.2%, the concentration expressed in percentage by weight scope of tin from about 0.2% to 0.7%.
We are surprised to find that opposite with the common practice, do not need to add any grain refinement Element, for example copper, selenium or sulphur. As described in detail below, method of the present invention can make The alloy strip steel rolled stock of casting has distinctive aplitic texture and other good characteristic. But should Clear, adopt method of the present invention also can successfully cast the alloy that contains grain refiner.
Can produce metal, for example lead-antimony alloy with any well-known method.
Referring now to accompanying drawing, Fig. 1 schematically illustrates the production line of casting continuous metal band. By turning to The towing plate 16 that the lead alloy band 10 that tube 12 is produced in conjunction with tundish 14 passes heating arrives Tape-cutting machine 18 is trimmed the side of metal tape 10, then from tactic gas-heated Device 20,22 and 24 below by, arrive cylinder 26 be set, so that around twisting on the reel 28 Form the roll coil of strip 30 before supplementary heatings.
Fig. 2 and 3 is shown specifically casting rotating cylinder 12 and tundish 14. Tundish 14 is by level Bottom 33, end wall 34 and two parallel sidewalls 35 and 36 consist of. The centre be surrounded by one to On inlet tube 40, be used for will fusing metal be incorporated into conveying chamber 42, conveying chamber 42 by End wall 34 and turbulence plate 47 consist of. The metal of fusing forms from the top by turbulence plate 47 The weir on flow into turn of tidal stream chamber 49. The metal of partial melting flows into by wall 43, base plate 38 and can The return chamber 44 that regulating weir 45 forms, but regulating weir 45 radial types are connected the end of return chamber On the plate 38, the apparent height of its controlled melting metal. This surface is by numbering 48 expressions. Gap 49 between base plate 38 and the vertical partition plate 50 lower edges ' metal inflow of fusing is watered Casting chamber 52, the apparent height of formation equals the height 48 in turn of tidal stream chamber 49. In being fixed on Between the flange insert 60 of bag on 14 have base plate 62 and parallel sidewall 64,66, they Form base plate and the sidewall of casting chamber 52. Behind the vertical formation casting chambers 52 50, next door Section, rotating cylinder 12 consists of its front portion. Flange insert 60 the most handy machining graphite are made.
With reference now to Fig. 3,, the flange insert 60 that removably is fixed on the tundish has It is upwards outside that sidewall 64,66, the inner surface that this sidewall is relative are preferably in the direction of leaving melt Tilt. The sidewall of this inclination can be eliminated the sclerosis edge of the metal alloy that is cast into band.
With reference to figure 2, casting rotating cylinder 12 can rotate around horizontal axis 71 again. The cylindrical of rotating cylinder 12 Perimeter surface 72 is that Xiao is sliding basically, and preferably advances sandblast with for example this medium of glass ball Process, in order to be formed for solidifying the nucleating point of melted alloy. Rotating cylinder also is equipped with edger roll 75. Shown in the figure one of them, this edger roll guarantees, is removing metal from drum surface 72 Be with before 10, the edge of metal tape 10 is cured fully. Edger roll 75 will with each Outward flange on the side is pressed on the drum surface 72 securely, thereby it is essential that metal tape is obtained Cooling, make the metal tape 10 of continuous casting produce the complete edge that requires. Rotating cylinder 12 usefulness Known EGR (not shown) water carries out internal cooling. The diameter of rotating cylinder 12, it turns to The temperature of melt in the processing texture of moving speed, rotating cylinder outer surface 72 and temperature and the tundish And apparent height 48 has determined to be dragged to appearance in the groove of the deposite metal from tundish Melt amount on the face 72, thereby determined the thickness of being with. The drum surface 72 of cooling makes fusing Metal condensation or be solidified into its width and the metal tape 10 of thickness substantial constant.
The centrifugal pump (not shown) that melted alloy is used by the deposite metal from preserve container through to Upper inlet pipe 40 is pumped into conveying chamber 42, and flows through from the weir that is made of turbulence plate 47, Enter turn of tidal stream chamber 49. End in turn of tidal stream chamber 49, metal flow are divided into two plumes, generally upwards, Flowing through can whole joint weir 45, enters return chamber 44, and another thigh passes control gap 49. Flowing through can The melted alloy of the downflow weir 45 of adjusting flows into return chamber 44, then by downward pipe 15 Enter the preservation container of melted alloy. Apparent height 48 is controlled by adjustable downflow weir, thereby protects There is suitable apparent height the card deposite metal in the casting chamber 52 by rotating cylinder 12. Fusing Metal is pumped in the tundish inlet 42 with such speed, so that can guarantee the fusing gold It is always excessive to belong to, and flows through continuously weir 45, enters return chamber 44. Can in the deposite metal Can and return between the locular wall 43 at turbulence plate 47 by slag that produce or that include wherein Easily with tundish in melt separate. But weir transfer 45, flow-control next door 50 and control Gap 49 can be controlled amount, the apparent height 48 of deposite metal in the tundish effectively, adds disorderly Flow plate 47, also can control the turbulent flow of deposite metal in the tundish. Therefore supply with the molten of rotating cylinder 12 Changing metal flow is passive flow basically, and its degree of depth (thickness) is constant basically.
For the deposite metal being offered drum surface 72, flange insert 60 and must want correct design and be in correct position with the binding face 61 of rotating cylinder.The design of flange insert 60 must guarantee during casting without any the obstruction of metal freezing on the flange insert that may cause just solidifying.Therefore the sidewall 64,66 of flange insert 60 is upwards outward-dipping in the direction of leaving the deposite metal.Surface 63 its profiles of the flange insert 60 of applying rotating cylinder 12 must accurately mate with the curvature of drum surface 72.Flange insert surface 63 is in the position at about " 9 to 10 o'clock " of clock next-door neighbour's drum surface 72.When the deposite metal when flange insert 60 is sent on the drum surface 72, surface 63 does not contact with surface 72.Yet the gap between surface 63 and drum surface 72 too senior general causes the deposite metal to be overflowed, and casting is interrupted.Adjusting device 65, for example high-precision guide rod ball bearing assembly, rack and pinion gearing or swallow-tail form carriage are used to make fast and exactly tundish 14 and flange insert 60 to shift to and move apart rotating cylinder 12 and its surface 72, thereby obtain correct position and make that correct gap is arranged therebetween.
The flange insert of doing with graphite 60 is particularly suitable for this purposes, because graphite is softer than the drum surface 72 of metal, and utilization covers sand paper on the drum surface 72, make binding face 63 nestle up drum surface 72 and make method that the casting rotating cylinder rotates finished surface 63 easily simultaneously, make it accurately meet drum surface 72.In addition, graphite is not easy to be soaked into by the deposite metal, so graphite is well suited for.
When rotating cylinder 14 rotated, the predetermined quantity of molten alloy just was dragged on its casting plane 72.Alloy solidify to form is with 10, this band leaves rotating cylinder in the position of about " " at 12 o'clock to 3 o'clock usually, the metal tape 10 that forms leaves rotating cylinder 12 by haulage drum 92 tractions of two parallel coats with rubber, and one of haulage drum is shown in Fig. 1, and it forms a part of cutting band assembly 18.Cylinder 92 is driven by a buncher (not shown), thereby when stripping metal band from casting plane, on metal tape, can obtain and preferably keep continuously needed pulling force, this buncher control casting speed, casting speed is adjusted according to the rotation of rotating cylinder 12.
Metal tape walk around cylinder 26 is set before, band is passed cutting between the adjustable rotating blade of band in the assembly 18, this blade cuts the burr of band, makes band have the width of accurate requirement.Metal tape can be walked around an eddy current rule (not shown), and these eddy current rule can be along the thickness of its width continuous monitoring band.The digital readout equipment that information can be provided is housed, thereby can guarantees with thickness and remain on this thickness with requirement.Band and then lead to torque controlled around spool 28, so that form the roll coil of strip.
The band of rolling can not directly be used for making battery electrode plate under the situation of low-antimony-lead alloy band because subsequently cut the band and extended operation in, the band of this rolling does not have enough crack resistances.For be increased in cut edge and extended operation in crack resistance, band will be heat-treated, and perhaps is right after after casting to heat-treat as continuous casting-heat treatment operation step during the one-tenth roll coil of strip, perhaps at the batch processing roll coil of strip subsequently.The low-antimony-lead alloy band is heated to about more than 190 ℃, preferably is heated to the temperature between about 200 ℃-230 ℃, and at high temperature keeps at least about 10 minutes, so that antimony is homogenized in the lead base body, fine being dispersed on the matrix, thus autgmentability obtained, and in good globality and intensity.The heat treatment of low-antimony-lead alloy makes the battery lead plate of successfully producing the expansion grid become possibility, and kind electrode has good electrochemical properties and non-leakage.
Example with detail description illustrates the present invention now.
With the composition weight percentage composition is 1.8%Sb, 0.15%As, 0.16-2%Sn, surplus is heated to about 400 ℃ for plumbous typical low-antimony-lead alloy in tundish of the present invention, and with the speed of 36-38 feet per minute, with 0.217 inch thickness, 3.604 inches bandwidth casts in through on the drum surface with the blasting treatment of glass ball.Temperature at the top center band of rotating cylinder 12 is 140 ℃, and the temperature that all causes of rotating cylinder cycle through rotating cylinder is 100-110 water cooling.The heating take-off plate of metal tape by 24 inches long is heated to 190 ℃ temperature at the middle body of plate by 125 watts of metal tape heaters 98 of four 13 inches, thereby makes the temperature of band reach about 170 ℃.
The alloy band passes under the effect of haulage drum 92 tractive force then cuts the burr that band assembly 18 cuts band, below heater 20,22 and 24, pass then to arrive cylinder 26 is set, heater 20,22 and 24 each 4 inches wide 36 inches long are equipped with 4 inches metal sides and the partially enclosed wherein top of metal tape of passing.Need add thermalloy and take at least 190 ℃ to, and make band remain on this temperature at least 10 minutes, to obtain autgmentability, and has the intensity of good globality, heater 20 preferably provides maximum temperature, and heater 22 and 24 then provides low slightly temperature so that metal tape 10 is heated to about 200 ℃ target temperature.Preferably adopt the heat add, for example adopt method that acetylene torch 100 heating are provided with cylinder 26 more than the metal tape indirect to 200 ℃.That can adopt expansion at 102 places makes the flame heat roll coil of strip of fuel with propane, to stop roll coil of strip cooling.
Metal tape can be heated at production period as shown in Figure 1, and is slowly keeping at least under the high temperature at least 190 ℃ 10 minutes in the roll coil of strip 30 before the cooling.But the metal tape of producing also can be directly forms the roll coil of strip on the spool and does not heat, and allows it cool down.This roll coil of strip can be afterwards carries out needed heat treatment by the producer of battery lead plate.
The invention provides many important advantages.The essentially no hole of metal tape with method of the present invention is produced has smooth surface, has predetermined width accurately and has predetermined uniform basically constant thickness.The thickness of band makes that the battery lead plate of doing with this band is thinner than the conventional electrodes plate that has method to do earlier.The thickness of band can be in the scope of 0.5-1.0mm, and this approximately is 50% of a prior art battery lead plate thickness.Thin battery lead plate can make the battery producer produce the battery with higher-energy and power density.The in use anticorrosive and creep of kind electrode plate, and find that it is better than the refining battery lead plate of the same component of usefulness slab casting method and the production of rolling processing method.
Very clear, the temperature and time of heating is according to the component of alloy and desired heat treatment method and can change.
Clearly, this paper can change with the embodiments of the invention of figure explanation and without prejudice to the scope of the present invention and the authority that are indicated in the appended claims.
Claims (29)
1. method from molten metal bath casting metals band, casting metal strip is on a cooling casting surface of moving that roughly is positioned at the casting rotating cylinder first half, and this method comprises:
The apparent height of control molten metal bath;
Above-mentioned casting surface is moved up, by above-mentioned molten metal bath, so that deposit one deck deposite metal thereon;
Cool off above-mentioned deposite metal, the metal tape on casting surface is solidified;
Stripping metal band from the casting surface;
Form a tundish, this tundish comprises that a pond presses close to the deposite metal of above-mentioned casting surface, above-mentioned tundish has conveying chamber, return chamber and turn of tidal stream chamber, also has a front opening of pressing close to casting surface, it is characterized in that a graphite flange insert presses close to above-mentioned front opening and removably be fixed in the tundish, it has the base plate and the sidewall of the tundish front opening that is suitable for fitting, above-mentioned thus melt can seepage, above-mentioned graphite flange insert has the front opening that is formed by flange insert base plate and flange insert sidewall, this base plate and sidewall match with the casting surface of pressing close to them, thereby can comprise above-mentioned deposite metal, a pond in the flange insert.
2. the method for claim 1, wherein metal is the big metal in lead or freezing range, and casting surface is a casting rotating cylinder with upper surface, and casting of metals is on this upper surface.
3. method as claimed in claim 2, wherein, the big alloy in freezing range is to contain antimony weight to be about 0.5% to 4.0%, surplus is plumbous low-antimony-lead alloy, heat above-mentioned foundry goods and take at least 190 ℃ to, heat the sufficiently long time, the foundry goods band is carried out heat treatment, the foundry goods band obtains autgmentability thus, and has good globality and intensity.
4. method as claimed in claim 3, wherein, low-antimony-lead alloy comprises about 1.5% to about 3.0% antimony, brings to few method heat treatment foundry goods band of at least 10 minutes of 190 ℃ of maintenances with the heating foundry goods.
5. the method for claim 1, wherein a turbulence plate is installed with formation tundish conveying chamber between rear wall and next door, and melt is introduced conveying chamber, it is flow through from turbulence plate.
6. method as claimed in claim 5, but this method a return chamber is set and a vertical weir transfer is set between turbulence plate and next door so that the apparent height in control molten bath and make melt flow into return chamber.
7. method as claimed in claim 6, this method are provided with the turn of tidal stream chamber between conveying chamber and return chamber, so that make the part of melt be diverted to melt pond in the flange insert, another part of melt is flow through from the weir, enter return chamber.
8. method as claimed in claim 7, wherein, casting surface is the rotating cylinder casting device, this method is provided with a pair of edge roller that separates that rolls and dock with casting surface, so that the band of curing is pressed against on the casting surface.
9. method as claimed in claim 8 wherein, heats the foundry goods band, thereby the foundry goods band is carried out heat treatment, and with the foundry goods tape wrapping of above-mentioned heating on spool.
10. method as claimed in claim 7 wherein, is utilized the thickness of the method control foundry goods band of the method for change melt pool surface height and the speed that utilization change casting surface is upward through molten metal bath.
11. method as claimed in claim 10, wherein, casting surface is the rotating cylinder casting device, and this method utilizes the method for glass ball sandblast casting surface to handle casting surface, thereby the nucleating point of many curing melted alloy is provided.
12. the method for claim 1, wherein above-mentioned metal is the big metal in lead or freezing range.
13. method as claimed in claim 12, wherein, metal is the big alloy of freezing range scope, comprises low-antimony-lead alloy, and this metal contains about 0.5% antimony to about 4% weight, and surplus is plumbous.
14. method as claimed in claim 12, wherein, metal is the big alloy in freezing range, comprises low-antimony-lead alloy, and this metal contains about 1.5% antimony to about 3.0% weight, and surplus is plumbous.
15. method as claimed in claim 12, wherein, metal is the big alloy in freezing range, comprises low-antimony-lead alloy, and this metal contains about 1.5% antimony to about 2.0% weight, and surplus is plumbous.
16. method as claimed in claim 14, wherein, under about 400 ℃ temperature, low-antimony-lead alloy is cast on the casting surface, the foundry goods band is through heat-treated, above-mentioned band is heated at least 190 ℃ temperature, and it was kept 10 minutes at least, thereby make foundry goods band acquisition autgmentability and have good globality and intensity.
17. according to the low-antimony-lead alloy foundry goods band that the method for claim 16 is produced, it has autgmentability, good globality and intensity, and good electrochemical properties.
18. method as claimed in claim 14, wherein, low-antimony-lead alloy also contains about 0.1% arsenic and about 0.2% tin to about 0.7% weight to about 0.2% weight in addition.
19. according to the low-antimony-lead alloy foundry goods band that the method for claim 18 is produced, it has autgmentability, good globality and intensity, and good electrochemical properties.
20. the method for claim 1, wherein metal is the big lead-calcium alloy in freezing range.
21. metal foundry goods band of producing according to the method for claim 20.
22. one kind by the molten metal bath in the tundish at a casting rotating cylinder direct equipment of cast metal band on the casting surface of the cooling of pressing close to this pond of the first half roughly, this equipment comprises: a rotating cylinder tumbler is used to make the casting surface of cooling to move up, pass molten metal bath, so that make casting of metals on the casting surface of cooling; Also comprise tundish, tundish comprises conveying chamber, return chamber and turn of tidal stream chamber, and these chambers have the passage that above-mentioned chamber is communicated in proper order, it is characterized in that: above-mentioned tundish has the front opening of casting surface; Have with a flange insert and to be suitable for pressing close to the tundish front opening and to be inserted into base plate and opposing sidewalls in the tundish, above-mentioned flange insert has the front opening that is formed by bottom flange plate and sidewall, this base plate matches with casting surface with sidewall, thereby can in the flange insert, comprise the above-mentioned deposite metal that a pond has the certain surface height, above-mentioned molten metal bath communicates with the turn of tidal stream chamber pressure, thereby the apparent height in pond is identical with the apparent height of deposite metal in the turn of tidal stream chamber in the flange insert; Be used for being controlled at the apparent height of the above-mentioned deposite metal of turn of tidal stream chamber with a control device, thus the apparent height in the control flange insert.
23. equipment as claimed in claim 22, wherein, but the above-mentioned device that is used for controlling turn of tidal stream chamber molten metal bath apparent height is a vertical weir transfer, and this weir separates the turn of tidal stream chamber with return chamber.
24. equipment as claimed in claim 25, wherein, above-mentioned tundish also comprises abuts rear wall and conveying chamber, in abutting connection with the return chamber in next door and the turn of tidal stream chamber between conveying chamber and return chamber, this turn of tidal stream chamber communicates with conveying chamber and return chamber, above-mentioned conveying chamber has the turbulence plate that conveying chamber and turn of tidal stream chamber are separated, but above-mentioned turn of tidal stream chamber has the vertical weir transfer that return chamber and turn of tidal stream chamber are separated, and this weir is used for being controlled at the apparent height of turn of tidal stream chamber and flange insert molten metal bath and making the deposite metal be diverted to return chamber.
25. equipment as claimed in claim 22, wherein, above-mentioned next door has the lower limb of a segment distance that separates with the tundish base plate, thereby forms an opening, makes the deposite metal can flow to the flange insert from the turn of tidal stream chamber.
26. as claim 22 or 25 described equipment, wherein, above-mentioned flange insert is made of graphite, and flange insert base plate conforms to casting surface with its profile of opposing sidewalls.
27. as claim 22 or 26 described equipment, wherein, the casting surface of cooling is the surface of cylindrical shape rotating cylinder, this rotating cylinder has the longitudinal axis that a linecasting face of making a list rotates around it, and above-mentioned cylinder rotating cylinder has the cooling duct of flowing through cooling water.
28. equipment as claimed in claim 27 wherein, has been installed a pair of rotating roller that separates, and it is docked with casting surface, and foundry goods is pressed against on the casting surface.
29. equipment as claimed in claim 28 wherein, has been installed the traction rollers of rotating, and is used to receive the metal tape that comes from rotating cylinder, and leaves rotating cylinder with pulling force traction metal tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121394A CN1048435C (en) | 1993-12-29 | 1993-12-29 | Method and apparatus for producing metal strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121394A CN1048435C (en) | 1993-12-29 | 1993-12-29 | Method and apparatus for producing metal strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1104565A CN1104565A (en) | 1995-07-05 |
| CN1048435C true CN1048435C (en) | 2000-01-19 |
Family
ID=4993696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93121394A Expired - Lifetime CN1048435C (en) | 1993-12-29 | 1993-12-29 | Method and apparatus for producing metal strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1048435C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786145A (en) * | 2010-03-26 | 2010-07-28 | 昆明大泽矿冶设备有限公司 | Method for casting, rolling and molding lead alloy plate strip |
| CN102049489A (en) * | 2010-11-27 | 2011-05-11 | 江苏理士电池有限公司 | High-precision quick-cooling type double interlayer drum of lead strip die casting machine |
| CN102294452B (en) * | 2011-05-30 | 2013-05-22 | 北京中钢贸科技发展有限公司 | Device and method for automatically reeling amorphous/nanocrystalline strips |
| WO2012172754A1 (en) * | 2011-06-17 | 2012-12-20 | パナソニック株式会社 | Pole plate for lead storage battery, lead storage battery, and method for producing pole plate for lead storage battery |
| CN104022254A (en) * | 2014-06-17 | 2014-09-03 | 柳州市动力宝电源科技有限公司 | Lead-calcium polar plate for storage battery, and collecting bar welding rod |
| CN114293128B (en) * | 2021-03-19 | 2022-08-23 | 骆驼集团襄阳蓄电池有限公司 | Process for spraying lead belt on positive electrode of lead-acid storage battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858642A (en) * | 1972-10-31 | 1975-01-07 | Cominco Ltd | Apparatus for delivering metal to a rotating continuous casting drum |
| US4955529A (en) * | 1986-12-29 | 1990-09-11 | Barnhart William D | Produce dispenser |
| GB2250856A (en) * | 1990-10-31 | 1992-06-17 | Magneti Marelli Spa | Producing composite grid for lead accumulator by casting |
-
1993
- 1993-12-29 CN CN93121394A patent/CN1048435C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858642A (en) * | 1972-10-31 | 1975-01-07 | Cominco Ltd | Apparatus for delivering metal to a rotating continuous casting drum |
| US4955529A (en) * | 1986-12-29 | 1990-09-11 | Barnhart William D | Produce dispenser |
| GB2250856A (en) * | 1990-10-31 | 1992-06-17 | Magneti Marelli Spa | Producing composite grid for lead accumulator by casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1104565A (en) | 1995-07-05 |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee |
Owner name: TEACMIERG METAL CO.,LTD. Free format text: FORMER NAME OR ADDRESS: COMEDGERT CO.,LTD. |
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Address after: British Columbia Canada Patentee after: Tektronix Kemingge metal company Address before: Vancouver, Canada Patentee before: Cominco Ltd. |
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Expiration termination date: 20131229 Granted publication date: 20000119 |