Die casting device for purifying high-purity pure iron

Abstract

The utility model relates to a die casting device for purifying high-purity pure iron, which comprises a steel ingot die and a wharve, the steel ingot die is hermetically connected with the wharve, a top opening of the steel ingot die is connected with a fire-resistant cover plate, the fire-resistant cover plate is connected with an argon blowing pipe, the inner wall of the top of the steel ingot die is connected with an exothermic riser, and a falling-off type ingot support is embedded in a bottom opening of the steel ingot die. A sliding baffle is arranged on the outer side of a bottom opening of the ingot mold, a flame heating pipe is arranged outside the ingot mold, is connected with an automatic lifting device, moves up and down along the outer wall of the ingot mold and is connected with a gas fuel distributor through a hose, and an output pipeline of the gas fuel distributor is connected with a flame cutting gun. The die casting device further comprises a high-voltage direct current device. According to the utility model, the flame heating and the high-voltage direct-current device work together, so that the slow solidification of liquid pure iron in the steel ingot mold can be realized, the removal of impurity element atoms, harmful element atoms, participating element ions and the like can be promoted, and the purity of the pure iron is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to smelting technical field, especially relate to a high purity pure iron's die casting device. BACKGROUND

[0002] Pure iron is a kind of iron alloy with very low carbon content, which has excellent properties such as low coercive force, good thermal and electromagnetic properties, soft texture and good toughness. The production of industrial pure iron has gradually transitioned from the initial induction furnace and electric arc furnace to the current converter, RH and LF. However, the purity of pure iron produced by these refining equipment is still 99.6%-99.8%, which cannot meet the market demand. High-purity industrial pure iron with Fe content ≥99.9% is mostly imported.

[0003] Currently, domestic and foreign experts use vacuum induction furnace suspension melting, cold crucible heating melting and other technologies to prepare high-purity iron with purity up to 99.99% or above, and the content of non-Fe impurity elements and harmful elements is lower, reaching several ppm or below. However, the high-purity iron produced by these devices is still in the laboratory or pilot stage, and the yield is only in the kilogram level, which cannot form large-scale production and meet the market demand.

[0004] The existing patent CN202010322121.3 die casting device and die casting production method sets one or two inward protruding structures in the lower part of the inner cavity of the split cap shell. The protruding structure plays a transitional role during pouring, and the lower end face of the heat insulation plate is a plane. The lower end of the heat insulation plate no longer has a chamfer structure, which avoids the problem of damage to the refractory material and casting ingot defects caused by the chamfering of the lower part of the heat insulation plate. At the same time, the inner cavity of the heat insulation plate is provided with a protruding structure. When demolding, the clamp can be inserted into the protruding position of the heat insulation plate, thereby achieving rapid demolding and improving the temperature of the casting ingot entering the heating furnace.

[0005] The existing patent CN202021639573.6 a high-purity iron production device discloses a high-purity iron production device, which includes a bottom plate, a rolling mill fixedly connected to the top side wall of the bottom plate, a bending plate symmetrically assembled to the outer side wall of the rolling mill, a side rod fixedly connected to the front side wall of the bending plate, and a threaded rod threadedly connected between the inner side walls of the two side rods.

[0006] Most of the existing die casting production devices improve the structure of the ingot mold to improve the yield and demolding efficiency, and reduce the impact on product quality during production. However, the purity of the pure iron produced is still not high, so it is of great significance to develop a set of equipment for purifying industrial pure iron to prepare high-purity pure iron. SUMMARY

[0007] The utility model wants to solve the technical problem to provide a kind of high purity pure iron's die casting device of purification, satisfy purity requirement can increase production scale again, shorten smelting cycle.

[0008] To realize the above-mentioned purpose, the utility model adopts following technical scheme implementation:

[0009] A kind of high purity pure iron's die casting device of purification, including steel ingot mould and ingot tray, steel ingot mould and ingot tray sealing connection, the top opening of steel ingot mould is connected with refractory cover plate, refractory cover plate is connected with argon blowing pipe, the top inner wall of steel ingot mould is connected with heating riser, the bottom opening of steel ingot mould is embedded with drop type ingot support, the outside of the bottom opening of steel ingot mould is equipped with sliding baffle, steel ingot mould outside is equipped with flame heating tube, flame heating tube is connected with automatic lifting device, moves up and down along the outer wall of steel ingot mould, flame heating tube is connected with gas fuel distributor by hose, the output pipeline of gas fuel distributor is connected with flame cutting gun, die casting device further includes high-voltage direct-current device.

[0010] The high-voltage direct-current device includes high-voltage direct-current power supply and controller, high-voltage direct-current power supply is connected with cathode and anode respectively, anode is inserted into steel ingot mould by refractory cover plate, cathode is connected with the outer wall of steel ingot mould, anode is insulatedly connected with telescopic rod, the top end of telescopic rod is connected with refractory cover plate.

[0011] The flame cutting gun is opposite to the bottom opening of steel ingot mould.

[0012] The flame heating tube is arranged in multiple layers with intervals.

[0013] A plurality of air holes are provided on the flame heating tube.

[0014] The flame heating tube is connected with the automatic lifting device by the support.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1) the flame heating tube arranged in multiple layers with intervals can ensure that the jet flame contacts seamlessly in the height direction. The flame heating tube is fixed with the automatic lifting device, and the automatic lifting device can control the reciprocating heating period of the flame heating tube. The two work together to ensure that the steel ingot mould is uniformly heated.

[0017] 2) the high-voltage direct-current device provides a high-voltage direct-current field, so that the impurity element atoms, harmful element atoms and residual element ions fixed in the solidified shell return to the liquid phase, reducing the concentration of non-Fe impurity elements, thereby increasing the Fe content in the pure iron solidified shell.

[0018] 3) the anode inserted into the ingot mold is connected with the telescopic rod, on one hand to ensure the stability of the electrode during casting, and on the other hand to ensure that the anode end is always in contact with the liquid pure iron by controlling the telescopic rod.

[0019] The utility model flame heating and high voltage direct current device synergistic effect, can realize liquid pure iron slow solidification in ingot mold, can promote the removal of impurity element atom and harmful element atom and participation element ion etc., and further improve the purity of pure iron. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structure schematic drawing of the utility model.

[0021] In the drawing: ingot mold 1, ingot tray 2, heating riser 3, flame heating pipe 4, refractory cover plate 5, argon blowing pipe 6, gas fuel distributor 7, drop type ingot support 8, sliding baffle 9, flame cutting gun 10, automatic lifting device 11, hose 12, high voltage direct current power supply 13, controller 14, cathode 15, anode 16, telescopic rod 17, air hole 18. DETAILED DESCRIPTION

[0022] In the description of the utility model, it is understood that the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0024] As Figure 1A kind of mould casting device for purifying high-purity pure iron, comprising a steel ingot mould 1 and an ingot tray 2, the steel ingot mould 1 and the ingot tray 2 are sealingly connected, a refractory cover plate 5 is connected to the top opening of the steel ingot mould 1, an argon blowing pipe 6 is connected to the refractory cover plate 5, a heating feeder 3 is connected to the inner wall of the top of the steel ingot mould 1, a drop-off ingot support 8 is embedded in the bottom opening of the steel ingot mould 1, a sliding baffle 9 is provided on the outside of the bottom opening of the steel ingot mould 1, a flame heating pipe 4 is provided outside the steel ingot mould 1, the flame heating pipe 4 is connected with an automatic lifting device 11, moves up and down along the outer wall of the steel ingot mould 6, the flame heating pipe 4 is connected with a gas fuel distributor 7 through a hose 12, an output pipeline of the gas fuel distributor 7 is connected with a flame cutting gun 10, and the mould casting device further comprises a high-voltage direct current device.

[0025] The high-voltage direct current device comprises a high-voltage direct current power supply 13 and a controller 14, the high-voltage direct current power supply 13 is connected with a cathode 15 and an anode 16 respectively, the anode 16 extends into the steel ingot mould 1 from the refractory cover plate 5, the cathode 15 is connected with the outer wall of the steel ingot mould 1, the anode 16 is insulatedly connected with an extension rod 17, and the top end of the extension rod 17 is connected with the refractory cover plate 5.

[0026] The flame cutting gun 10 is opposite to the bottom opening of the steel ingot mould 1.

[0027] The flame heating pipe 4 is arranged in multiple layers at intervals.

[0028] A plurality of air holes 18 are provided on the flame heating pipe 4.

[0029] The flame heating pipe 4 is connected with the automatic lifting device 11 through a support.

[0030] Working principle:

[0031] The flame heating pipe heats the steel ingot mould, so that the steel ingot mould transmits heat to the solidified shell after being heated, intensifies the thermal vibration of atoms in the solidified shell, increases the diffusion activation energy of solute atoms, so that some impurity element atoms which are just fixed escape from the crystal lattice in the form of solid solution or interstitial, enter the liquid phase to participate in solidification again. On the other hand, it plays a certain heat preservation role, so that the liquid pure iron in the steel ingot mould reaches a slow solidification effect, so that the atoms of impurity elements and harmful elements in the easily segregated elements in the liquid phase have enough time to enter the liquid phase through solute redistribution, and the purity of iron in the solidified shell is improved.

[0032] The high-voltage direct current of the high-voltage direct current device carries a large number of electrons with momentum, these electrons transmit kinetic energy to solute ions through collision, and the force in the process of electrostatic force and momentum exchange will make the solute ions migrate in the conductor, so that some residual element ions such as Cu 2+ , Cr 3+Under the action of the above, migrate to the end of solidification, from the solidification front to the liquid phase, thereby improving the purity of the solidification shell.

[0033] When the casting is finished, the sliding baffle is opened, the drop ingot support is dropped under the action of gravity, and then the solidification shell at the ingot support position is cut off by flame cutting, so that the internal liquid pure iron flows out.

[0034] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is described clearly and completely. However, the following described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Combined with the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0035] Embodiment:

[0036] A kind of high purity pure iron's die casting device for purification, including steel ingot mould 1 and ingot tray 2, steel ingot mould 1 and ingot tray 2 seal connection, the top opening of steel ingot mould 1 is connected with refractory cover plate 5, refractory cover plate 5 is connected with argon blowing pipe 6, argon blowing pipe 6 is connected with argon into the inner cavity of steel ingot mould 1.

[0037] The inner wall of the top of steel ingot mould 1 is connected with heating riser 3, drop ingot support 8 is embedded in the bottom opening of steel ingot mould 1, sliding baffle 9 is arranged on the outside of the bottom opening of steel ingot mould 1, flame heating pipe 4 is arranged outside steel ingot mould 1, and flame heating pipe 4 is arranged in two layers with interval.

[0038] Flame heating pipe 4 is connected with automatic lifting device 11 (screw lifting mechanism), and moves up and down along the outer wall of steel ingot mould 6, flame heating pipe 4 is connected with gas fuel distributor 7 through hose 12, the output pipeline of gas fuel distributor 7 is connected with flame cutting gun 10, and flame cutting gun 10 is opposite to the bottom opening of steel ingot mould 1.

[0039] High-voltage direct-current device includes high-voltage direct-current power supply 13 and controller 14, high-voltage direct-current power supply 13 is connected with cathode 15 and anode 16 respectively, anode 16 is inserted into steel ingot mould 1 by refractory cover plate 5, cathode 15 is connected with the outer wall of steel ingot mould 1, anode 16 is insulatedly connected with telescopic rod 17, and the top end of telescopic rod 17 is connected with refractory cover plate 5.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and deformations can be made to these embodiments without departing from the principles and basic spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A die casting apparatus for purifying high purity iron, characterized by comprising: The mould and the ingot disc are sealingly connected, a refractory cover plate is connected on the top opening of the ingot mould, an argon blowing pipe is connected on the refractory cover plate, a heating riser is connected on the inner wall of the top of the ingot mould, a drop-off ingot support is embedded on the bottom opening of the ingot mould, a sliding baffle is arranged on the outside of the bottom opening of the ingot mould, a flame heating pipe is arranged outside the ingot mould, the flame heating pipe is connected with an automatic lifting device, moves up and down along the outer wall of the ingot mould, the flame heating pipe is connected with a gas fuel distributor through a hose, an output pipeline of the gas fuel distributor is connected with a flame cutting gun, the mould casting device further comprises a high-voltage direct current device.

2. The mold casting apparatus for purifying high purity iron according to claim 1, wherein The high-voltage direct current device comprises a high-voltage direct current power supply and a controller, the high-voltage direct current power supply is connected with a cathode and an anode respectively, the anode extends into the ingot mould through the refractory cover plate, the cathode is connected with the outer wall of the ingot mould, the anode is insulatingly connected with a telescopic rod, and the top end of the telescopic rod is connected with the refractory cover plate.

3. The mold casting apparatus for purifying high purity iron according to claim 1, wherein The flame cutting gun is opposite to the bottom opening of the ingot mould.

4. The mold casting apparatus for purifying high purity iron according to claim 1, wherein The flame heating pipe is arranged in multiple layers at intervals.

5. The mold casting apparatus for purifying high purity iron according to claim 1, wherein The flame heating pipe is provided with a plurality of air holes.

6. The mold casting apparatus for purifying high purity iron according to claim 1, wherein The flame heating pipe is connected with the automatic lifting device through a support.

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