CN104668815A - Aluminum hot welding flux and welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments - Google Patents
Aluminum hot welding flux and welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments Download PDFInfo
- Publication number
- CN104668815A CN104668815A CN201510042153.7A CN201510042153A CN104668815A CN 104668815 A CN104668815 A CN 104668815A CN 201510042153 A CN201510042153 A CN 201510042153A CN 104668815 A CN104668815 A CN 104668815A
- Authority
- CN
- China
- Prior art keywords
- welding
- square steel
- aluminum
- cathode square
- magnetic field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K23/00—Alumino-thermic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses aluminum hot welding flux and a welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments. The aluminum hot welding flux comprises, by weight, 16.1% of aluminum powder, 61% of iron oxide, 8% of alloying agents and 14.9% of fillers. The alloying agents comprise Mn, Cr and V alloy. The fillers comprise steel wire heads and iron balls. The welding method includes aluminum hot welding procedures of aligning, die filling, preheating, welding and die opening. The aluminum hot welding flux and the welding method have the advantages that electricity consumption is omitted when the cathode square steel of the electrolytic baths is welded, influence of magnetic fields on high-temperature molten steel obtained by the aid of alumino-thermic reaction can be prevented, the aluminum hot welding flux and the welding method are quite applicable to welding operation on the cathode square steel of the electrolytic baths in the high-intensity magnetic field environments in the aluminum electrolysis industry, the welding degree is higher than 95%, bottom resistance of the welded electrolytic baths is nearly zero, the electrolytic baths can be uniformly electrified and can stably and safely run, voltages further can be reduced by 6-10 millivolts, and electricity can be saved by 60-100 kilowatt-hours by each ton of aluminum.
Description
Technical field
The present invention relates to a kind of aluminum heat flux and welding method of strong magnetic field circumstance welding of aluminum electric tank cathode square steel.
Background technology
Because of the industry characteristics of aluminum electrolysis industry, its electrolytic cell is in operation three--four years just entered the overhaul life, and bottom of electrolytic tank lay cathode square steel because of rotten erosion also need replacing.And cathode square steel is connected to aluminium busbar outside electrolytic cell, for non-dismountable assembly, will connect aluminium busbar place at cathode square steel two ends during replacing and reserve corresponding length, rotten erosion part cut away, the brachycephaly more renewing cathode square steel and former reserved connection aluminium busbar welds together.So replacing and welded cathode square steel are one of groundworks of electrolytic cell overhaul.
Cathode square steel is layed between bottom of electrolytic tank antiseepage compacting layer and charcoal element block, and every two one is group, and a general electrolytic cell has 40--50 many groups, the welding junction of about totally 100, has aluminium busbar soft ribbons to be attached thereto outside electrolytic cell.Original cathode square steel is needed to cut open from the place's oxyacetylene metal-cutting of electrolytic cell inwall 130--150mm length in aluminium busbar one end during overhaul, remove old cathode square steel, change the new cathode square steel processing length, same model again, fit together with charcoal block and be again laid on bottom of electrolytic tank, to align the maintenance mode welding and be connected with the square steel brachycephaly centering stayed.
In the past when carrying out electrolytic cell overhaul employing be that the welding manner butt welding cathode square steel such as traditional arc welding or gas shielded arc welding welds; because overhaul does not have a power failure, carries out in not stopping production situation in factory building; all be in whole factory building in non-directional strong magnetic field circumstance during Aluminum Electrolysis Production; as welded with arc welding or gas shielded arc welding mode target square steel under this strong magnetic field circumstance; there is serious arc blow impact; and non-directional high-intensity magnetic field also cannot with other demagnetization mode process, the weld job that almost cannot normally carry out.Its seam degree only can reach requirement ground about 40%.Cathode square steel is as bad in seam, its electric current inputted by aluminium busbar is by producing larger resistance during cathode square steel, and nearly 100 weld bonds because of the degree of institute affected by magnetic fields seam inconsistent, the size of the resistance value of its each group is also different, many harmful phenomenon such as energising at the bottom of electrolytic bath is uneven, bottom land generates heat, electrolytic cell operation is not steady will be caused, safety in production is also impacted.And the increase of resistance has influence on the input of electric current, considerably increase power consumption.
Summary of the invention
The present invention proposes a kind of aluminum heat flux and welding method of strong magnetic field circumstance welding of aluminum electric tank cathode square steel, the present invention has when utilizing aluminum heat flux to weld electric tank cathode square steel does not need power consumption, high-temperature molten steel through thermit reaction formation is not subject to the impact in magnetic field, the characteristic that special diamagnetism tooling fixture is easy to use under strong magnetic field circumstance, be highly suitable for the weld job to electric tank cathode square steel under aluminum electrolysis industry strong magnetic field circumstance, its seam degree large more than 95%, postwelding bottom of electrolytic tank resistance is almost nil, and make electrolytic cell be energized evenly, operate steadily, also can pressure drop 6--10 millivolt, ton aluminium about economize on electricity 60--100 degree electricity.
The present invention realizes particular by following technical scheme:
Weld an aluminum heat flux for electric tank cathode square steel under strong magnetic field circumstance, be made up of aluminium powder, iron oxide, alloy addition and filler.
Further, the percentage by weight of described aluminium powder is 16.1%, and the percentage by weight of iron oxide is 61%, and alloy addition mass percent is 8%, and filler mass percent is 14.9%.
Further, described aluminium powder selects high activity, high-purity aluminium powder.
Further, described alloy addition is Mn, Cr, V alloy.
Further, described filler is steel wire head and iron shot.
Further, the granularity of described iron oxide is 20--80 order, and the granularity of alloy addition is at 5--20 order.
Weld a method for electric tank cathode square steel under strong magnetic field circumstance, comprise the following steps:
(1) align: cathode square steel excised by erodable section and the cathode square steel brachycephaly stayed is cleaned out, and aligning levelling with the new cathode square steel that corresponding need weld together, reserving 26 ~ 30mm weld seam;
(2) die-filling: the special welding sand mold special with the two panels of the cathode square steel same model that need weld and base plate centering to be buckled in commissure and to make it fit tightly, fix with diamagnetic clip tool, and load onto crucible holder and dreg-accepting hopper, with joint sealing sand, the joint sealing groove around welding sand mold is tamped sealing;
(3) preheating: use oxygen with preheater--propane gas flame, after utilizing pressure-reducing valve and flowmeter adjustment flame to required each parameter value, preheater is chewed head aim at allowance weld centre position and fix, with manual time-keeping, preheating is carried out to the cathode square steel termination be buckled in welding sand mold, adopt timing preheating method, the whole end face temperature of control cathode square steel joint to be welded reaches 750--850 degree more uniformly;
(4) weld: the crucible be equipped with as the aluminum heat flux of any one of claim 1-6 is placed on crucible holder center position above welding sand mold mouth, to ignite solder flux with high-temperature match, through the aluminothermy chemical reaction in 30 seconds, discharge high temperature melting alloy, restore high-temperature molten steel; Be poured in welding sand mold by side top casting mode, the slag formed after reaction flows in dreg-accepting hopper through slag-drip opening, and high-temperature molten steel, by cooled and solidified together after square steel joint both ends of the surface fusing to be welded, completes the welding of target rod square steel;
(5) form removal: remove jig, knock out sand mold in 8 minutes, cool and cleaned out by the sand remained around weld seam after 20 minutes for after high-temperature molten steel casting complete 5 minutes, cuts unnecessary overlap and rising head rod with oxyacetylene metal-cutting, with sander, weld grinding is shaping.
Further, in step (3), preheating adopts first, then both sides, finally middle again mode.
Further, the preheating time of step (3) with cathode square steel Unit Weight kg/m divided by 10 for preheating time (minute).
The present invention adopts that highly active aluminium powder is the oxidant of thermit reaction, iron oxide is reducing agent, and filler additive is carburant and increases molten steel amount; Alloy addition is adjustment molten steel chemical analysis, makes weld seam material consistent with mother metal.And aluminum weld utilization is chemical thermit reaction principle, the proportioning of its aluminium and iron oxide must be a complete chemical equation, as not right in each dosages of substance, content in formula, just can not produce chemical reaction completely, its high temperature produced and the molten steel restored just do not reach the requirement of aluminum weld.The aluminum heat flux of respective model and special sand mold need be selected by the model size of cathode square steel when therefore using, subpackage can not use or arbitrarily add or reduce solder flux metering during use, otherwise various weld defect will be produced after welding in weld seam, affect welding quality.
The factors such as the shape of preheating situation and molten steel amount and welding sand mold are considered in the design of weld seam, and as weld seam is excessive or too smallly end face preheating to be welded all can be caused bad in warm, postwelding produces weld defect in weld seam; And solder flux amount is also prepare by molten steel amount needed for the allowance weld specified and sand mold die cavity capacity, during use, molten steel just in time fills up welding sand mold inside for good.So the too small meeting of weld seam is formed in warm, end surface top to be welded is burnt, middle and bottom preheat temperature not, preheater chew head burn red, burn or the phenomenon such as tempering; Weld seam is bigger than normal also can make the bad installation of sand mold, joint sealing sand seal case tight and badly bleeding water phenomenon or molten steel is not enough, weld seam is discontented with.
The injection system structure of Aluminithermic weld of the present invention is complicated, and due to the particularity of aluminum weld, the pouring temperature of aluminothermy molten steel is very high, molten steel shrinks larger in solidifying, easy formation shrinkage cavity, pore, loose, the defects such as hot tearing, therefore the pre-heat effect when aluminum weld operates and aluminothermy molten steel the mobility be poured in die cavity and cooled and solidified process particularly important, and it is very short to the shaping time to enter die cavity from pouring molten steel, generally complete second at 40-50, therefore the preheating of cathode square steel creates very important impact to solidifying after cast, therefore preheating can be described as core in whole welding job, the application is the strict proportioning controlling aluminum heat flux in aluminum weld process, and the preheating before welding of target square steel, seam degree large more than 95% can be realized, postwelding bottom of electrolytic tank resistance is almost nil, whole welding process is not by the impact of strong magnetic field circumstance.
Detailed description of the invention
Be clearly and completely described the technical scheme in the embodiment of the present invention below in conjunction with the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Under strong magnetic field circumstance, an aluminum heat flux for welding of aluminum electric tank cathode square steel, is made up of aluminium powder, iron oxide, alloy addition and filler, calculates by mass percentage, and the percentage by weight of aluminium powder is 16.1%; The percentage by weight of iron oxide is 61%; Alloy addition is selected as Mn, Cr, V alloy, and mass percent is 8%; Filler is steel wire head and iron shot, and mass percent is 14.9%.Wherein, aluminium powder selects high activity, high-purity aluminium powder, and the granularity of iron oxide is 20--80 order, and the granularity of alloy addition is at 5--20 order.
Weld a method for electric tank cathode square steel under strong magnetic field circumstance, comprise the following steps:
(1) align: cathode square steel excised by erodable section and the cathode square steel brachycephaly stayed is cleaned out, and aligning levelling with the new cathode square steel that corresponding need weld together, reserving 26 ~ 30mm weld seam.The factors such as the shape of preheating situation and molten steel amount and sand mold are considered in the design of weld seam, and as weld seam is excessive or too smallly end face preheating to be welded all can be caused bad in warm, postwelding produces weld defect in weld seam; And solder flux amount is also prepare by molten steel amount needed for the allowance weld specified and sand mold die cavity capacity.So weld seam is too small can form that end surface top to be welded is burnt, middle and bottom preheat temperature not, preheater chews head and burns the phenomenon such as braised in soy sauceization or tempering.Weld seam is bigger than normal also can make the bad installation of sand mold, joint sealing sand seal case tight and badly bleeding water phenomenon or molten steel deficiency, and weld seam is discontented with.
(2) die-filling: the special welding sand mold special with the two panels of the cathode square steel same model that need weld and base plate centering to be buckled in commissure and to make it fit tightly, fix with diamagnetic clip tool, and load onto crucible holder and dreg-accepting hopper, with joint sealing sand, the joint sealing groove around welding sand mold is tamped sealing;
(3) preheating: use oxygen with preheater--propane gas flame, after utilizing pressure-reducing valve and flowmeter adjustment flame to required each parameter value, preheater is chewed head aim at allowance weld centre position and fix, carry out preheating to the cathode square steel termination be buckled in welding sand mold, the whole end face temperature of control cathode square steel joint to be welded reaches 750--850 degree more uniformly.Oxygen--propane flammable gas makes pre-hot gas source to the employing of this technique, and propane flammable gas is because its energy is sufficient, it is comparatively slow to heat, and heat up in tunneling boring position more uniform characteristic, is relatively applicable to the preheating of the great section workpiece of rail or cathode square steel and so on.Preheat temperature is by oxygen, propane gas pressure, unit interval gas flow values and flame flame core length and preheating time etc. parameter ensure, by each parameter adjustment good flame of preheater by operation technological requirement during welding, chew head and put into the weld seam center position buckling well sand mold, start to use manual time-keeping after fixing with preheater support.After completing by the preheating time required for each model cathode square steel, namely the temperature of its end surface to be welded reaches required temperature value (750--850 degree), can remove preheater, carry out next step welding process operation.
The preheating time of each model cathode square steel is through in many ways to test with the ratio of preheat temperature and draws, by preheater flame by the good flame of each parameter adjustment, put into weld seam center position fixing after, use Chronograph timing, after the time required arrives.Because the model of cathode square steel is different, it is preheating to and requires that the time of temperature is also different, see the time parameter (calculating model size with welding end surface sectional area) in lower subordinate list the preheating time of each model cathode square steel, preheating adopts first, both sides again, last mode middle again, ensures end face temperature uniformity.Preheating time with cathode square steel Unit Weight kg/m divided by 10 for preheating minute, the temperature of requirement is at 750--850 degree, and practical operation only need require operate according to form.
Subordinate list: cathode square steel aluminum weld technique parameter
(4) weld: the crucible be equipped with as the aluminum heat flux of any one of claim 1-6 is placed on crucible holder center position above welding sand mold mouth, to ignite solder flux with high-temperature match, through the aluminothermy chemical reaction in 30 seconds, discharge high temperature melting alloy, restore high-temperature molten steel; Be poured in welding sand mold by side top casting mode, the slag formed after reaction flows in dreg-accepting hopper through slag-drip opening, and high-temperature molten steel, by cooled and solidified together after square steel joint both ends of the surface fusing to be welded, completes the welding of target rod square steel.What in this step, welding was used is chemical thermit reaction principle, the proportioning of its aluminium and iron oxide must be a complete chemical equation, as not right in each dosages of substance in formula, just can not produce chemical reaction completely, its high temperature produced and the molten steel restored just do not reach the requirement of aluminum weld.
(5) form removal: remove jig in after high-temperature molten steel casting complete 5 minutes, within 8 minutes, knock out sand mold, cool and after 20 minutes, the sand remained around weld seam is cleaned out, unnecessary overlap and rising head rod is cut with oxyacetylene metal-cutting, with sander, weld grinding is shaping, record weld hardness: 220-240HB, tensile strength: 550---650 MPa.
Mainly comprised by the defect of aluminum weld of the present invention: a, slag inclusion, be characterised in that incision position exists the slag inclusion of irregular size, generally in lead, Crack cause: welding slag is not able to do in time to be separated with molten steel; Or there are other foreign material to enter weld seam in joint sealing process; Preheating overdoes, and end face " drips tear "; End face is unclean.B, lack of penetration, be characterised in that: fracture is incomplete tusion state, producing cause: preheat temperature is inadequate or uneven; Sand mo(u)ld and allowance weld contraposition inaccurate, gap is uneven.C, pore, be characterised in that: the hole of the circle that joint interior surface is smooth or ellipse, main cause: solder flux, sand mo(u)ld, crucible make moist; Joint sealing sand is excessively damp; Moisture and the greasy dirt of square steel are not cleaned out.D, incomplete tusion, be characterised in that: the inner fusion area planarization fracture of joint, main cause: during welding cast, square steel tension, rail gap is subjected to displacement.
The high-temperature molten steel that whole welding procedure does not need power supply, thermit reaction to be formed is not by the impact in magnetic field, solve the difficult problem that welded cathode square steel under strong magnetic field circumstance runs into, the characteristic that special diamagnetism tooling fixture is easy to use under strong magnetic field circumstance, be highly suitable for the weld job to electric tank cathode square steel under aluminum electrolysis industry strong magnetic field circumstance, its seam degree is more than 95%, postwelding bottom of electrolytic tank resistance is almost nil, also can pressure drop 6--10 millivolt, and ton aluminium about economizes on electricity 60--100 degree electricity.
The electrolytic aluminium production capacity of China is at the forefront in the world, general large and medium-sized aluminium electrolysis enterprise has electrolytic cell hundreds of, each enterprise has the electrolytic cell of nearly 25% to carry out large repairs every year, up to ten thousand electrolytic cells within 1 year, will be had in China to want overhaul, and the replacing of cathode square steel is one of necessary turnover job with welding.And the strong magnetic field circumstance in factory building make common welding manner cannot meet cathode square steel welding after quality requirement, be applied to the aluminum heat flux that electric tank cathode square steel welded under strong magnetic field circumstance so this and welding method has a extensive future.And because welding quality is good, reduce the electricity charge that pressure drop saves and run once the cost regaining welding material by 2 years afterwards at electrolytic cell.Enterprise is made to reach safe operation, energy-saving and cost-reducing effect.
Adopt the welding procedure of the application, the cathode square steel sent out in the Aluminum Electrolysis Production facility electrolytic cell overhaul of the Xinjiang Duo Jia Large Electrolytic Aluminium enterprises such as Aluminum at many and company, letter welds, because it does not affect by high-intensity magnetic field and easier operating characteristic, the welding quality that ensure that, through enterprise's feedback display after welding, electrolytic cell energising evenly, operate steadily, safety, and energy-saving efficiency is obvious.Easier operating process effectively improves welding work efficiency, and the cathode square steel in single electrolytic cell is welded on three--and five working days can complete.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. an aluminum heat flux for strong magnetic field circumstance welding of aluminum electric tank cathode square steel, is characterized in that, is made up of aluminium powder, iron oxide, alloy addition and filler.
2. the aluminum heat flux of strong magnetic field circumstance welding of aluminum electric tank cathode square steel as claimed in claim 1, it is characterized in that, the percentage by weight of described aluminium powder is 16.1%, and the percentage by weight of iron oxide is 61%, alloy addition mass percent is 8%, and filler mass percent is 14.9%.
3. the aluminum heat flux of strong magnetic field circumstance welding of aluminum electric tank cathode square steel as claimed in claim 1, it is characterized in that, described aluminium powder selects high activity, high-purity aluminium powder.
4. the aluminum heat flux of strong magnetic field circumstance welding of aluminum electric tank cathode square steel as claimed in claim 1, it is characterized in that, described alloy addition is Mn, Cr, V alloy.
5. the aluminum heat flux of strong magnetic field circumstance welding of aluminum electric tank cathode square steel as claimed in claim 1, it is characterized in that, described filler is steel wire head and iron shot.
6. the aluminum heat flux of strong magnetic field circumstance welding of aluminum electric tank cathode square steel as claimed in claim 1, it is characterized in that, the granularity of described iron oxide is 20--80 order, and the granularity of alloy addition is at 5--20 order.
7. the method for welding of aluminum electric tank cathode square steel under strong magnetic field circumstance, is characterized in that, comprise the following steps:
(1) align: cathode square steel excised by erodable section and the cathode square steel brachycephaly stayed is cleaned out, and aligning levelling with the new cathode square steel that corresponding need weld together, reserving 26 ~ 30mm weld seam;
(2) die-filling: the special welding sand mold special with the two panels of the cathode square steel same model that need weld and base plate centering to be buckled in commissure and to make it fit tightly, fix with diamagnetic clip tool, and load onto crucible holder and dreg-accepting hopper, with joint sealing sand, the joint sealing groove around welding sand mold is tamped sealing;
(3) preheating: use oxygen with preheater--propane gas flame, after utilizing pressure-reducing valve and flowmeter adjustment flame to required each parameter value, preheater is chewed head aim at allowance weld centre position and fix, with manual time-keeping, preheating is carried out to the cathode square steel termination be buckled in welding sand mold, adopt the mode of timing preheating, the whole end face temperature of control cathode square steel joint to be welded reaches 750--850 degree more uniformly;
(4) weld: the crucible be equipped with as the aluminum heat flux of any one of claim 1-6 is placed on crucible holder center position above welding sand mold mouth, to ignite solder flux with high-temperature match, through the aluminothermy chemical reaction in 30 seconds, discharge high temperature melting alloy, restore high-temperature molten steel; Be poured in welding sand mold by side top casting mode, the slag formed after reaction flows in dreg-accepting hopper through slag-drip opening, and high-temperature molten steel, by cooled and solidified together after square steel joint both ends of the surface fusing to be welded, completes the welding of target rod square steel;
(5) form removal: remove jig, knock out sand mold in 8 minutes, cool and cleaned out by the sand remained around weld seam after 20 minutes for after high-temperature molten steel casting complete 5 minutes, cuts unnecessary overlap and rising head rod with oxyacetylene metal-cutting, with sander, weld grinding is shaping.
8. weld the method for electric tank cathode square steel under strong magnetic field circumstance as claimed in claim 7, it is characterized in that, in step (3), preheating adopts first, then both sides, finally again in the middle of mode.
9. weld the method for electric tank cathode square steel under strong magnetic field circumstance as claimed in claim 7, it is characterized in that, preheating time of step (3) with cathode square steel Unit Weight kg/m divided by 10 for preheating minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510042153.7A CN104668815A (en) | 2015-01-28 | 2015-01-28 | Aluminum hot welding flux and welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510042153.7A CN104668815A (en) | 2015-01-28 | 2015-01-28 | Aluminum hot welding flux and welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104668815A true CN104668815A (en) | 2015-06-03 |
Family
ID=53304679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510042153.7A Pending CN104668815A (en) | 2015-01-28 | 2015-01-28 | Aluminum hot welding flux and welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104668815A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001908A (en) * | 2016-06-29 | 2016-10-12 | 新疆众和股份有限公司 | Welding method and device for electrolytic cell cathode square steel |
| CN106541246A (en) * | 2016-09-27 | 2017-03-29 | 新疆众和股份有限公司 | The method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment |
| CN106736038A (en) * | 2016-12-14 | 2017-05-31 | 新疆众和股份有限公司 | A kind of aluminum steel Thermofusion welding agent |
| CN106735661A (en) * | 2016-12-21 | 2017-05-31 | 新疆众和股份有限公司 | Anode electrolytic cell guide rod and the method for steel pawl sweat soldering |
| CN106825986A (en) * | 2016-12-12 | 2017-06-13 | 新疆众和股份有限公司 | A kind of iron-based Thermofusion welding agent |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10202375A (en) * | 1997-01-23 | 1998-08-04 | Yasuo Shirokura | Joining method for deformed reinforcing bar |
| CN1772960A (en) * | 2005-11-02 | 2006-05-17 | 中国铝业股份有限公司 | Method for thermite welding aluminium electrolytic cell cathode steel bar |
| CN101372068A (en) * | 2008-08-18 | 2009-02-25 | 江阴东大新材料研究院 | Faster welding method for armored vehicle aluminium alloy part for emergency in battlefield |
| CN102029486A (en) * | 2009-09-29 | 2011-04-27 | 北京中铁科新材料技术有限公司 | Thermit welding flux for high hardness steel rail and welding method thereof |
| CN201834987U (en) * | 2010-11-05 | 2011-05-18 | 河南中孚实业股份有限公司 | Cathode power outlet device of aluminium electrolysis cell |
| CN102554187A (en) * | 2012-02-08 | 2012-07-11 | 中国铁道科学研究院金属及化学研究所 | Steel rail thermite welding system and method |
| CN102862005A (en) * | 2012-10-19 | 2013-01-09 | 成都桑莱特科技股份有限公司 | Thermit iron welding flux special for welding steel grounding materials and welding method thereof |
-
2015
- 2015-01-28 CN CN201510042153.7A patent/CN104668815A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10202375A (en) * | 1997-01-23 | 1998-08-04 | Yasuo Shirokura | Joining method for deformed reinforcing bar |
| CN1772960A (en) * | 2005-11-02 | 2006-05-17 | 中国铝业股份有限公司 | Method for thermite welding aluminium electrolytic cell cathode steel bar |
| CN101372068A (en) * | 2008-08-18 | 2009-02-25 | 江阴东大新材料研究院 | Faster welding method for armored vehicle aluminium alloy part for emergency in battlefield |
| CN102029486A (en) * | 2009-09-29 | 2011-04-27 | 北京中铁科新材料技术有限公司 | Thermit welding flux for high hardness steel rail and welding method thereof |
| CN201834987U (en) * | 2010-11-05 | 2011-05-18 | 河南中孚实业股份有限公司 | Cathode power outlet device of aluminium electrolysis cell |
| CN102554187A (en) * | 2012-02-08 | 2012-07-11 | 中国铁道科学研究院金属及化学研究所 | Steel rail thermite welding system and method |
| CN102862005A (en) * | 2012-10-19 | 2013-01-09 | 成都桑莱特科技股份有限公司 | Thermit iron welding flux special for welding steel grounding materials and welding method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程学会焊接学会编: "《焊接手册 第1卷 焊接方法及设备》", 31 January 2008 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001908A (en) * | 2016-06-29 | 2016-10-12 | 新疆众和股份有限公司 | Welding method and device for electrolytic cell cathode square steel |
| CN106541246A (en) * | 2016-09-27 | 2017-03-29 | 新疆众和股份有限公司 | The method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment |
| CN106825986A (en) * | 2016-12-12 | 2017-06-13 | 新疆众和股份有限公司 | A kind of iron-based Thermofusion welding agent |
| CN106736038A (en) * | 2016-12-14 | 2017-05-31 | 新疆众和股份有限公司 | A kind of aluminum steel Thermofusion welding agent |
| CN106736038B (en) * | 2016-12-14 | 2019-09-20 | 新疆众和股份有限公司 | A kind of aluminum steel Thermofusion welding agent |
| CN106735661A (en) * | 2016-12-21 | 2017-05-31 | 新疆众和股份有限公司 | Anode electrolytic cell guide rod and the method for steel pawl sweat soldering |
| CN106735661B (en) * | 2016-12-21 | 2019-01-04 | 新疆众和股份有限公司 | The method of anode electrolytic cell guide rod and the sweat soldering of steel pawl |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104668815A (en) | Aluminum hot welding flux and welding method for welding cathode square steel of aluminum electrolytic baths in high-intensity magnetic field environments | |
| CN102009256B (en) | Butt welding process for high strength steel for ship structure | |
| CN101249585A (en) | Electrified welding method of aluminum cell cathode steel bar | |
| CN104972220A (en) | In-situ power-cut-free welding method for soft mother belts and aluminum bus of cathode of aluminum electrolysis cell | |
| CN105855788A (en) | Welding process for repairing crack of ball milling iron casting | |
| CN103255412A (en) | High hardness material laser cladding process method for roller work surface | |
| CN103317226A (en) | Secondary self-propagating welding method for cathode soft belt and large bus for aluminum electrolysis cell | |
| CN107598340A (en) | Big thick plate T-joint welding method | |
| CN105414708A (en) | Welding repair method for gray cast iron | |
| CN104325230A (en) | Abutting welding method for box columns of large-scale factory building | |
| CN109249126B (en) | Welding tool and welding method for anode steel claw | |
| CN108031957A (en) | A kind of welding manufacture method of weather-proof all welded steel structured stiff girder suspension bridge | |
| CN102950363B (en) | Overlaying repair process for winch drum | |
| CN102909479B (en) | Square long girder steel welding method | |
| CN103192236A (en) | Wharf ship loader telescoping mechanism rail production process and special rail butt joint tool thereof | |
| CN103084702A (en) | Welding repair method for trolley breakage of sintering machine | |
| CN1772960A (en) | Method for thermite welding aluminium electrolytic cell cathode steel bar | |
| CN108356397B (en) | Large container corrosion-resistant layer wide-band-electrode surfacing method based on residual stress regulation | |
| CN106271140A (en) | A kind of plasma MAG complex welding method | |
| KR101273419B1 (en) | Metallic slag pot with new structure and a manufacturing method thereof | |
| CN102672302A (en) | Fracture welding and crack repairing method of band saw blade and matched welding tool set | |
| CN108145306A (en) | A kind of multistation electroslag welding with plate electrode device | |
| CN106392302B (en) | A kind of welding method of vertical aluminium busbar | |
| CN217394001U (en) | Simple welding device for cracking of large-scale high-voltage motor base lug | |
| CN103920971B (en) | Welding method in storage battery production process and the pecten used and welding rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |
|
| RJ01 | Rejection of invention patent application after publication |