CN201217678Y - Smelting and cleaning treatment furnace for renewable resources intermediate alloy of nickel - Google Patents

Abstract

The utility model discloses a melting and purifying treatment furnace for nickel renewable resource intermediate alloy. In order to obtain the nickel renewable resource intermediate alloy with even component and less amount of the impurities, the melting and purifying treatment furnace comprises a primary melting furnace (10) and a fining furnace (20), wherein air supply elements are arranged in the bottom walls of the primary melting furnace (10) and the fining furnace (20). The air supply elements in the bottom wall of the primary melting furnace (10) are a plurality of big air supply elements (18) evenly distributed, the air supply element in the bottom wall of the fining furnace (20) is a small air supply element (25) installed at the central position of the bottom wall of the fining furnace, and the air supply element is communicated with an air supply source (40) through an air supply pipeline. The melting and purifying treatment furnace is mainly used for the melting and purifying treatment when the nickel renewable resources are molten into the nickel-base intermediate alloy.

Description

The melting and purifying of nickel renewable resource master alloy is handled stove

Technical field

The utility model relates to a kind of electric furnace of deposite metal, and the melting and purifying that has particularly related to nickel renewable resource master alloys is handled stove.

Background technology

Ni-based master alloy, master alloy such as nickel chromium triangle, nickel molybdenum for example, be mainly used in the smelting process of superalloy, stainless steel and other metal materials as various matrix alloies and additive, therefore, requirement master alloy chemical ingredients is even, segregation is little, does not have visible nonmetal inclusion, and gas content is low, foreign matter content must satisfy the requirement of institute's metal smelting material, and is easily broken and deposit in air and never degenerate etc.

The master alloy that adopts the nickel renewable resource to produce, the master alloy that for example adopts callable nickel renewable resource such as various nickel waste materials, superalloy waste material, stainless steel waste material to produce, because its complicated component, composition range requires narrow, the physicochemical property difference great disparity of component, the general fusing synthesis method that adopts is produced.The equipment of producing Ni-based master alloy at present is induction furnace or electric arc furnace, adopt induction furnace or electric arc furnace to produce Ni-based master alloy, owing to alloy is not carried out purifying treatment, the alloy composition that causes melting to be come out is inhomogeneous, impurity is sulphur particularly, detrimental impurity content such as phosphorus are higher, gas in the alloy is difficult for eliminating etc., caused very big obstacle as matrix alloy or the additive alloy that manufactures a finished product for the above-mentioned master alloy of follow-up usefulness, even can not produce the high temperature alloy that composition and clarity are all had relatively high expectations with the master alloy of matter time, thereby limited the range of application of above-mentioned master alloy, be unfavorable for the recycling of renewable resource.

On April 23rd, 2003, disclosed Chinese invention patent specification sheets CN1412325A disclosed a kind of oxygen melting furnace and electric arc furnace duplex process for steel making and equipment.Described oxygen melting furnace and electric arc furnace duplex steelmaking equipment are made up of electric arc furnace and oxygen melting furnace, described electric arc furnace is still kept the existing equipment state, and described oxygen melting furnace is by melting furnace, strengthens heating flue feed bin, furnace charge and carry three major portions such as pre-hotflue to connect sealing successively to connect and constitute.Melting furnace adopts the tapping of reflection tap hole, and the very large constant volume of a heat storage capacity molten bath is arranged, it can through preheating and strengthen heated go into furnace charge moment fusion, the oxygen melting furnace material is fast, energy consumption is low, output is big.This oxygen melting furnace and electric arc furnace duplex steelmaking equipment have mainly solved the extensive molten steel iron charge of concentrating, carry high temperature hot charging molten steel to each electric arc furnace, make electric arc furnace with the electric energy that consumes seldom the hot charging liquid steel refining be become any important use steel in the short time, this equipment does not solve the purifying treatment problem of molten steel equally.

The utility model content

The technical problems to be solved in the utility model provides a kind of melting and purifying that can the nickel renewable resource master alloy that smelting component is even, foreign matter content is few and handles stove, adopt the Ni-based master alloy clarity height of this purifying treatment stove melting, help the recycling of nickel renewable resource.

For solving the problems of the technologies described above, the melting and purifying of nickel renewable resource master alloy described in the utility model is handled stove, comprises just furnace and refining furnace, in the diapire of described furnace just and refining furnace gas supply element is housed.

As a kind of preferred structure of the present utility model, the gas supply element in the described furnace diapire just is equally distributed a plurality of big gas supply element, and described big gas supply element is connected by steam line and air supply source; Gas supply element in the described refining furnace diapire is a little gas supply element of heart position installation therein, and this gas supply element is connected by steam line and air supply source.

The first furnace that above-mentioned melting and purifying is handled stove is an electric arc furnace, is equipped with in its bell top is three circular holes that equilateral triangle distributes and penetrates into intravital three large electrodes of stove, and described electrode is by the electrode lifting device clamping and by transformer-supplied; Described bell covers on the top of body of heater and can be promoted by the bell running gear and rotate; The left end of described body of heater has a quadrate fire door and can cover the stove face plate of this fire door, and its right-hand member has tapping spout, and in the bottom of body of heater the turndown device is housed.

Above-mentioned melting and purifying is handled the refining furnace of stove and mainly is made up of steel teeming ladle, bung and two small electrodes; Described small electrode also can be penetrated in the steel teeming ladle in two circular holes at bung top by the electrode lifting device clamping by transformer-supplied; Described bung covers on the top of steel teeming ladle and can be promoted by the bung lifting gear; Position near the Qi Gai limit on bung is provided with charging opening.

Compared with prior art, the beneficial effects of the utility model are as follows:

The melting and purifying of nickel renewable resource master alloy described in the utility model is handled stove, in the first furnace by handling stove at this melting and purifying and the diapire of refining furnace gas supply element is installed and has been obtained following effect: can make when just furnace is at the Ni-based master alloy of melting the alloy liquid in the stove is produced the gas stirring effect, reduce the phenomenon of big boiling and " furnace bottom is cold ", help adjusting composition, improve the recovery rate of alloy and remove foreign matter contents such as sulphur, phosphorus, and can reduce consumption of electrode and shorten smelting time and save electric energy; Refining furnace can carry out deoxidation, desulfurization and be adjusted to the refining operation that grades to the alloy liquid of first furnace, and can heat and stir alloy liquid, thereby reach the purpose of further purification alloy liquid, can obtain the higher Ni-based master alloy material of all even clarity of composition, help the recycling of renewable resource.

Description of drawings

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.

Fig. 1 is the structure diagram that melting and purifying of the present invention is handled stove.

Fig. 2 is alloy liquid is poured refining furnace into from first furnace state graph.

Fig. 3 is the state graph of refining furnace refined alloy liquid.

Fig. 4 is the state graph of the steel teeming ladle cast ingot casting of refining furnace.

Fig. 5 is an alloy liquid purification process technique schema.

Embodiment

The melting and purifying of nickel renewable resource master alloy shown in Figure 1 is handled stove, mainly is made up of first furnace 10 and refining furnace 20.

Described furnace 10 just is an electric arc furnace, and it includes bell 14, body of heater 15, turndown device 19 and three large electrodes 13.Described large electrode 13 is clamped to be in three circular holes that equilateral triangle distributes from bell 14 tops by the electrode lifting device (not shown) and penetrates in the body of heater 15, and three large electrodes 13 are by transformer 30 power supplies during molten alloy; Described bell 14 covers on the top of body of heater 15 and can be left body of heater 15 by lifting of bell running gear (not shown) and rotation, is convenient to body of heater 15 from top loading; The left end of body of heater 15 has a quadrate fire door 11, and observe the interior situation of stove in the time of can supplying molten alloy and skim, take a sample, feed in raw material etc. manipulated, and covers with stove face plate 17 when fire door 11 does not use, and the right-hand member of body of heater 15 has tapping spout 12, can confess alloy liquid and use.In the bottom of body of heater 15 turndown device 19 is housed, can makes body of heater 15 moving to tapping spout 12 1 inclinations when going out alloy liquid, alloy liquid is flowed out from tapping spout 12, also can in fusion process, make body of heater 15 moving, be convenient to take off slag operation to fire door 11 1 inclinations.In the furnace hearth wall 16 of body of heater 15, be provided with equally distributed a plurality of big gas supply element 18, described big gas supply element 18 is connected by steam line and air supply source 40, during molten alloy, gases such as argon gas that air supply source 40 provides or nitrogen are transported to by big gas supply element 18 in the alloy molten bath of body of heater 15 the insides alloy liquid are stirred.

Described refining furnace 20 mainly is made up of steel teeming ladle 24, bung 21 and two small electrodes 23.Described small electrode 23 is clamped in two circular holes at bung 21 tops by the electrode lifting device (not shown) and penetrates in the steel teeming ladle 24, and two small electrodes 23 are by transformer 30 power supplies during refined alloy; Described bung 21 covers on the top of steel teeming ladle 24 and can be promoted by bung lifting gear (not shown) and leaves steel teeming ladle 24, is convenient to steel teeming ladle 24 and receives the alloy liquid of pouring into from the tapping spout 12 of first furnace 10; Position near the Qi Gai limit on bung 21 is provided with charging opening 22, but the effect of this charging opening double as sampling thermometer hole or vision slit; Diapire center position at steel teeming ladle 24 is equipped with a little gas supply element 25, this gas supply element is connected by steam line and air supply source 40, during refined alloy, gases such as argon gas that air supply source 40 provides or nitrogen are transported to by little gas supply element 18 in the alloy molten bath of body of heater 15 the insides alloy liquid are stirred refining.

Be provided with the device of may command steam line air feed in the air supply source 40, make air supply source 40 both can give first furnace 10 or refining furnace 20 air feed separately, also can give first furnace 10 and refining furnace 20 air feed simultaneously; Equally, transformer 30 both can have been given first furnace 10 or refining furnace 20 power supplies separately, also can give first furnace 10 and refining furnace 20 power supplies simultaneously.Can use just furnace 10 or refining furnace 20 separately according to the actual needs of producing like this, or use just furnace 10 and refining furnace 20 simultaneously.

Shown in Figure 2, the intact alloy liquid of furnace 10 meltings just and after the preliminary refining of bottom blowing gas, starting turndown device 19 makes body of heater 15 moving to tapping spout 12 1 inclinations when going out alloy, alloy liquid flows out and pours in the steel teeming ladle 24 of refining furnace 20 from tapping spout 12, at this moment, described bung 21 is promoted by bung lifting gear (not shown) and leaves steel teeming ladle 24.

Shown in Figure 3, after just the alloy liquid of refining dephosphorization enters the steel teeming ladle 24 interior slagging-off of refining furnace 20, make new slag according to the requirement of desulfurization, and heat with 23 pairs of alloy liquid of small electrode, carry out barrel BOTTOM ARGON BLOWING simultaneously and stir refining, help the degassing, desulfurization and quickening slag-metal reaction speed, promote inclusion floating to get rid of, make alloy liquid composition evenly and be purified.

Shown in Figure 4, be contained in the steel teeming ladle 24 through the alloy liquid of refining and purifying treatment and support steel teeming ladle 24 cast ingot castings 50 by support 26.

Fig. 5 shows the technical process that the melting and purifying that adopts nickel renewable resource master alloy of the present invention is handled stove melting and purifying treatment alloy liquid.

Claims (5)

1, a kind of melting and purifying of nickel renewable resource master alloy is handled stove, comprises just furnace (10) and refining furnace (20), it is characterized in that: in the diapire of described furnace (10) just and refining furnace (20) gas supply element is housed.

2, handle stove according to the described melting and purifying of claim 1, it is characterized in that: the gas supply element in described furnace (10) diapire just is equally distributed a plurality of big gas supply elements (18), and described big gas supply element (18) is connected by steam line and air supply source (40).

3, handle stove according to the described melting and purifying of claim 1, it is characterized in that: the gas supply element in described refining furnace (20) diapire is a little gas supply element (25) of heart position installation therein, and this gas supply element is connected by steam line and air supply source (40).

4, handle stove according to claim 1 or 2 described melting and purifyings, it is characterized in that: described furnace (10) just is an electric arc furnace, in its bell (14) top is three circular holes that equilateral triangle distributes three large electrodes (13) that penetrate in the body of heater (15) are housed, described electrode is powered by the electrode lifting device clamping and by transformer (30); Described bell (14) covers on the top of body of heater (15) and can be promoted by the bell running gear and rotate; The left end of body of heater (15) has a quadrate fire door (11) and can cover the stove face plate (17) of this fire door, and the right-hand member of body of heater (15) has tapping spout (12), in the bottom of body of heater (15) turndown device (19) is housed.

5, handle stove according to claim 1 or 3 described melting and purifyings, it is characterized in that: described refining furnace (20) mainly is made up of steel teeming ladle (24), bung (21) and two small electrodes (23); Described small electrode (23) also can be penetrated in the steel teeming ladle (24) in two circular holes at bung (21) top by the electrode lifting device clamping by transformer (30) power supply; Described bung (21) covers on the top of steel teeming ladle (24) and can be promoted by the bung lifting gear; The position of going up near the Qi Gai limit at bung (21) is provided with charging opening (22).

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