CN215050617U - Device for preparing titanium-based alloy by melting titanium-containing slag - Google Patents
Device for preparing titanium-based alloy by melting titanium-containing slag Download PDFInfo
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Abstract
The utility model provides a device for preparing titanium-based alloy by melting titanium-containing slag. The device comprises a molten titanium-containing slag supply unit, an aluminum powder supply unit (and/or an aluminum wire supply unit), a titanium alloy smelting furnace, an inert gas supply unit and a waste heat recovery unit; the molten titanium-containing slag supply unit is provided with a molten titanium-containing slag outlet; the aluminum powder supply unit is used for supplying aluminum powder, and the aluminum wire supply unit is used for supplying aluminum wires; the titanium alloy smelting furnace is provided with a furnace body, the furnace body is provided with a molten titanium-containing slag inlet, and the molten titanium-containing slag inlet is connected with a molten titanium-containing slag outlet; the titanium alloy smelting furnace also comprises a jet flow injection unit and/or a wire feeding unit, wherein the inlet of the jet flow injection unit is connected with the aluminum powder supply unit, and the outlet of the jet flow injection unit is connected with the inside of the furnace body. The device can directly produce the titanium-based alloy by utilizing the molten titanium-containing slag, and aluminum is added into the molten titanium-containing slag by adopting a wire feeding method or a jet blowing method to be reduced to directly produce the titanium-based alloy, so that the device has the advantages of high efficiency, low consumption and simple process.
Description
Technical Field
The utility model relates to the technical field of metallurgy, particularly, relate to a device that titanium base alloy was prepared to titanium slag is contained in melting.
Background
Titanium is an important strategic resource, belongs to the third metal behind iron and aluminum, and is widely applied to the fields of chemical engineering, weapons, aerospace, new energy and the like, titanium-based alloy produced by titanium slag mainly comprises titanium-aluminum alloy, titanium-silicon-aluminum alloy and the like, and the alloy has wide application range and wide source.
The titanium-containing slag comprises titanium-containing slag produced by treating vanadium-titanium magnetite with a blast furnace process or a non-blast furnace process and high-titanium slag produced by smelting titanium concentrate, wherein the titanium-containing slag produced by the common vanadium-titanium magnetite has low titanium grade, is difficult to use economically and has large stockpiling amount.
Application No. 201410345713.1 proposes a method for producing titanium-aluminum alloy melt by aluminothermic self-propagating method using titanium oxide as raw material, wherein rutile or high titanium slag, aluminum powder and other raw materials are mixed after being ground and reacted in a self-propagating reaction furnace. However, this method has a disadvantage of complicated process flow.
Application number 201310216499.5 provides a method for smelting an aluminum-silicon-titanium alloy by using titanium-containing slag and fly ash in a blast furnace, which comprises the steps of finely grinding the fly ash and other raw materials, then pressing balls to smelt in a submerged arc furnace, finely grinding the blast furnace slag to 0.075-0.425 mm, smelting for 3-4 h at 1800-1950 ℃, refining the produced aluminum-silicon-titanium alloy, wherein the refining temperature is 1400-1700 ℃, and the refining time is 1-1.5 h. However, the technique has the problems of high energy consumption, high treatment cost, and cooling and fine grinding process plants of the titanium-containing slag.
Application No. 201911257002.8 provides a method for obtaining an Al-Si-Ti alloy by finely grinding titanium-containing blast furnace slag and aluminum-silicon overhaul slag and then electrolyzing at 950-960 ℃. Application number 201910592443.7 proposes a method for preparing Al-Si-Ti alloy from metallic Al, Si waste and Ti-containing slag by mixing lime, quartz stone and Na3AlF6Uniformly mixing, melting to be used as a fluxing agent, finely grinding to 80-00 meshes, uniformly mixing metal aluminum particles, metal silicon waste, titanium-containing slag and the fluxing agent, smelting at 1500-1800 ℃ for 2-4 h, and obtaining the alloyAnd cooling the material at a constant speed of 2-5 ℃/min. However, these methods have a drawback of complicated processes.
For the reasons, the device for preparing the titanium-based alloy from the titanium-containing slag has the advantages of low energy consumption, simple process and high titanium resource recovery rate.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a device of titanium base alloy is prepared to titanium slag is contained in melting to solve the process that exists when preparing titanium base alloy by titanium slag contained among the prior art complicacy, the high scheduling problem of energy consumption.
In order to achieve the above object, according to one aspect of the present invention, there is provided an apparatus for preparing a titanium-based alloy by melting titanium-containing slag, comprising: a molten titanium-containing slag supply unit having a molten titanium-containing slag outlet; an aluminum powder supply unit and/or an aluminum wire supply unit, wherein the aluminum powder supply unit is used for supplying aluminum powder, and the aluminum wire supply unit is used for supplying an aluminum wire; the titanium alloy smelting furnace is provided with a furnace body, wherein the furnace body is provided with a molten titanium-containing slag inlet which is connected with a molten titanium-containing slag outlet; the titanium alloy smelting furnace also comprises a jet flow injection unit and/or a wire feeding unit, wherein the inlet of the jet flow injection unit is connected with the aluminum powder supply unit, and the outlet of the jet flow injection unit is connected with the interior of the furnace body; the inlet of the wire feeding unit is connected with the aluminum wire supply unit, and the outlet of the wire feeding unit is connected with the interior of the furnace body; the top of the furnace body is also provided with a flue gas outlet; an inert gas supply unit, the outlet of which is communicated with the furnace body; and the inlet of the waste heat recovery unit is connected with the flue gas outlet.
Further, the device comprises an aluminum powder supply unit, the jet injection unit comprises one or more jet spray guns, the side wall and/or the top wall of the furnace body are/is also provided with jet holes which are in one-to-one correspondence with the jet spray guns, and the jet spray guns are connected with the jet holes.
Further, the aluminum powder supply unit and the jet flow injection unit are connected through an injection pipeline, and an outlet of the inert gas supply unit is connected with the injection pipeline.
Furthermore, the spray holes are arranged on the side walls, the height of the slag in the furnace body is represented as H, the height of the spray holes from the interface between the slag and the alloy in the furnace body is represented as H, and H/H is 1/10-1/3.
Further, the device comprises an aluminum wire supply unit, one or more wire feeding holes are formed in the top of the furnace body, and the aluminum wire supply unit is connected with the wire feeding holes and used for conveying aluminum wires to the interior of the furnace body through the wire feeding holes.
Further, the apparatus further comprises: and an inlet of the dust collector is connected with an outlet of the waste heat recovery unit.
Further, the bottom of furnace body still is provided with titanium base alloy export, and the lateral part still is provided with the tailings export, and the device still includes: the titanium-based alloy receiving unit is connected with the titanium-based alloy outlet; and the tailing receiving unit is connected with the tailing outlet.
The utility model provides a device that titanium slag preparation titanium base alloy is contained in melting utilizes the melting to contain titanium slag supply unit and directly drops into the melting to titanium alloy smelting furnace with titanium slag, then utilizes aluminite powder supply unit and efflux jetting unit to the interior jetting aluminite powder of stove, perhaps carries out reduction reaction through aluminium wire supply unit and feeding line unit to the interior feeding aluminium wire of stove. The two ways of adding aluminum can be carried out alternatively or simultaneously. In the actual reaction process, the molten titanium-containing slag can complete the initial reaction with the entering aluminum, and the thermite reaction is an exothermic reaction, so that the reduction reaction can be carried out on the premise of no other additional energy supplement, and the waste heat of the molten titanium-containing slag and the heat release in the reaction process can be effectively utilized, thereby saving the energy consumption in the production process of the titanium-based alloy.
In the reduction reaction process, metal aluminum is selectively reduced in the molten titanium-containing slag, titanium and silicon oxides in the slag are reduced to form titanium and silicon, so that a titanium-based alloy or a titanium-aluminum-silicon alloy is formed, and oxides of aluminum, calcium and magnesium form aluminate to be left in the slag. Because of the utility model discloses directly adopt the mode of jetting aluminite powder and/or feeding aluminium wire in to the melting titanium-containing slag, the reaction kinetics condition is good, need not to contain the broken fine grinding of titanium-containing slag raw materials and prepares burden again. Along with the reaction, the produced titanium-based alloy can be fully settled in a molten pool, so that the recovery rate of valuable elements such as titanium is improved, and the produced waste residue can be directly used for building materials due to no harmful elements after water quenching.
In a word, utilize the utility model provides an above-mentioned device can utilize the melting to contain titanium sediment direct production titanium base alloy, adopts wire feeding method or jet blowing method to add aluminium to the melting to contain titanium sediment in carry out reduction treatment direct output titanium base alloy, have high efficiency, consume slowly, the simple advantage of process.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of an apparatus for melting titanium-containing slag to produce a titanium-based alloy according to an embodiment of the present invention; and
FIG. 2 is a schematic view showing a structure of a titanium alloy smelting furnace in an apparatus for producing a titanium-based alloy by melting titanium-containing slag according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a molten titanium-containing slag supply unit; 20. an aluminum powder supply unit; 30. an aluminum wire supply unit; 40. a titanium alloy smelting furnace; 50. an inert gas supply unit; 60. a waste heat recovery unit; 70. a dust collector; 80. a titanium-based alloy receiving unit; 90. a tailings receiving unit;
41. a furnace body; 42. a jet injection unit; 43. a wire feeding unit;
411. a molten titanium-containing slag inlet; 412. spraying a hole; 413. a feeding hole; 414. a flue gas outlet; 415. a titanium-based alloy outlet; 416. and a tailings outlet.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As described in the background art, the titanium-based alloy prepared from the titanium-containing slag in the prior art has the problems of complicated process, high energy consumption and the like.
In order to solve the above problems, the present invention provides an apparatus for preparing titanium-based alloy by melting titanium-containing slag, as shown in fig. 1, the apparatus comprises a melting titanium-containing slag supply unit 10, an aluminum powder supply unit 20 (and/or an aluminum wire supply unit 30), a titanium alloy smelting furnace 40, and an inert gas supply unit 50; the molten titanium-containing slag supply unit 10 has a molten titanium-containing slag outlet; an aluminum powder supply unit 20 for supplying aluminum powder, an aluminum wire supply unit 30 for supplying aluminum wire; as shown in fig. 2, the titanium alloy smelting furnace 40 has a furnace body 41, the furnace body 41 has a molten titanium-containing slag inlet 411, and the molten titanium-containing slag inlet 411 is connected to the molten titanium-containing slag outlet; the titanium alloy smelting furnace 40 also comprises a jet flow injection unit 42 and/or a wire feeding unit 43, wherein the inlet of the jet flow injection unit 42 is connected with the aluminum powder supply unit 20, and the outlet is connected with the inside of the furnace body 41; the inlet of the wire feeding unit 43 is connected with the aluminum wire supply unit 30, and the outlet is connected with the interior of the furnace body 41; an outlet of the inert gas supply unit 50 communicates with the furnace body 41; the top of the furnace body 41 is also provided with a flue gas outlet 414, and the device further comprises a waste heat recovery unit 60.
The utility model discloses among the above-mentioned device, utilize the melting to contain titanium slag supply unit and directly contain the titanium slag with the melting and drop into to titanium alloy smelting furnace, then utilize aluminite powder supply unit and efflux jetting unit to the interior jetting aluminite powder of stove, perhaps carry out reduction reaction to the interior feeding aluminium wire of stove through aluminium wire supply unit and wire feeding unit. The two ways of adding aluminum can be carried out alternatively or simultaneously. In the actual reaction process, the molten titanium-containing slag can complete the initial reaction with the entering aluminum, and the thermite reaction is an exothermic reaction, so that the reduction reaction can be carried out on the premise of no other additional energy supplement, and the waste heat of the molten titanium-containing slag and the heat release in the reaction process can be effectively utilized, thereby saving the energy consumption in the production process of the titanium-based alloy.
In the reduction reaction process, metal aluminum is selectively reduced in the molten titanium-containing slag, titanium and silicon oxides in the slag are reduced to form titanium and silicon, so that a titanium-based alloy or a titanium-aluminum-silicon alloy is formed, and oxides of aluminum, calcium and magnesium form aluminate to be left in the slag. Because of the utility model discloses directly adopt the mode of jetting aluminite powder and/or feeding aluminium wire in to the melting titanium-containing slag, the reaction kinetics condition is good, need not to contain the broken fine grinding of titanium-containing slag raw materials and prepares burden again. Along with the reaction, the produced titanium-based alloy can be fully settled in a molten pool, so that the recovery rate of valuable elements such as titanium is improved, and the produced waste residue can be directly used for building materials due to no harmful elements after water quenching.
The reduction reaction is carried out in an inert atmosphere, so the titanium alloy smelting furnace 40 is preferably a closed smelting furnace, air is prevented from entering to cause alloy oxidation or nitridation, metal aluminum particles are added in a blowing mode, argon is preferably used as a carrier gas, and generated flue gas is mainly argon and returns to a blowing system for use after being treated. And high temperature flue gas is generated during the reaction. The waste heat recovery unit 60 can be used for recovering waste heat of flue gas produced in the furnace body.
In a word, utilize the utility model provides an above-mentioned device can utilize the melting to contain titanium sediment direct production titanium base alloy, adopts wire feeding method or jet blowing method to add aluminium to the melting to contain titanium sediment in carry out reduction treatment direct output titanium base alloy, have high efficiency, consume slowly, the simple advantage of process.
The above-mentioned jet injection unit 42 is used for injecting the aluminum powder into the furnace body 41, and preferably, the above-mentioned apparatus includes an aluminum powder supply unit 20, the jet injection unit 42 includes one or more jet guns, the side wall and/or the top wall of the furnace body 41 is further provided with spray holes 412 corresponding to the jet guns one by one, and the jet guns are connected with the spray holes 412. In this way, the aluminum powder can be side blown and/or top blown by one or more jet lances, and during the actual blowing, preferably by means of submerged blowing. The number of the jet flow spray guns is preferably 1-10, so that the aluminum powder can be in contact with the molten slag and react more fully.
In order to promote more stable blowing of the aluminum powder into the molten titanium-containing slag in the furnace, in a preferred embodiment, the aluminum powder supply unit 20 and the jet blowing unit 42 are connected by a blowing line, and the outlet of the inert gas supply unit 50 is connected to the blowing line. The aluminum powder can be carried by inert gas as a carrier to complete blowing through the arrangement.
In the actual operation process, as the aluminum powder enters the furnace to perform reduction reaction with the molten titanium-containing slag, titanium and silicon oxides in the slag can be reduced to perform titanium and silicon, and further obtain the titanium-based alloy (according to the silicon-containing condition and the excessive condition of aluminum in the slag, the titanium-based alloy or the titanium-aluminum-silicon alloy can be obtained). In order to enable the aluminum powder and the slag to react more fully and avoid influencing the sedimentation of the lower titanium-based alloy layer, in a preferred embodiment, the spray holes 412 are arranged on the side wall, the height of the slag in the furnace body 41 is represented as H, and the height of the spray holes 412 from the interface between the slag and the alloy in the furnace body 41 is represented as H, so that H/H is 1/10-1/3. Therefore, in the actual reaction process, the spraying position of the aluminum powder can be positioned above the titanium-based alloy layer, and is particularly positioned at the lower part of the reduction tailings layer or the molten titanium-containing slag layer, so that the reaction is more stably carried out, the titanium-based alloy is convenient to settle and discharge, and the recovery rate of titanium is promoted. The height H of the molten slag is actually the height of a slag layer at the upper part of the molten pool, the molten pool is sequentially provided with a molten titanium-containing slag layer, a reduction tailing layer and a titanium-based alloy layer from top to bottom, and the height H of the molten slag is the total height of the molten titanium-containing slag layer and the reduction tailing layer. h is the distance between the spray hole and the interface of the reduction tailings layer and the titanium-based alloy layer, and the spray hole is positioned in the slag layer.
As for the manner of introducing the aluminum wire, it is preferable that the above apparatus includes an aluminum wire supply unit 30, one or more wire feeding holes 413 are provided at the top of the furnace body 41, and the aluminum wire supply unit 30 is connected to each of the wire feeding holes 413 for feeding the aluminum wire to the inside of the furnace body 41 through the wire feeding hole 413. In the actual production process, preferably set up 1 ~ 15 feeding holes, distribute it in the different positions at furnace body 41 top to make the aluminium wire distribute more evenly, the degree of consistency of rate is improved, impels the reaction to go on more efficiently.
In a preferred embodiment, as shown in fig. 1, the apparatus further comprises a dust collector 70, and an inlet of the dust collector 70 is connected with an outlet of the waste heat recovery unit 60. The flue gas produced in the furnace body can be subjected to waste heat recovery and dust collection in sequence by the arrangement. The specific type of the dust collector can be a bag dust collector and the like, and preferably, in the human recovery treatment process and the dust collection treatment process, the equipment also has airtightness, so that the regenerated inert gas after treatment can be recycled. In a preferred embodiment, the dust collector 70 has a smoke outlet and a dust-removal gas outlet, and is connected to the inert gas supply unit 50. Thus, the recovered regenerated inert gas can be returned to the previous step. In addition, the dust outlet of dust collector 70 is connected to titanium alloy smelting furnace 40 to return a portion of the dust to further processing.
In a preferred embodiment, the bottom of the furnace body 41 is further provided with a titanium-based alloy outlet 415, the side is further provided with a tailings outlet 416, and the device further comprises: a titanium-based alloy receiving unit 80 connected to the titanium-based alloy outlet 415; a tailings receiving unit 90, and a tailings outlet 416.
According to another aspect of the present invention, there is provided a method for preparing titanium-based alloy by melting titanium-containing slag, which comprises the steps of: under inert atmosphere, putting the molten titanium-containing slag into a furnace body 41 of a titanium alloy smelting furnace 40, spraying aluminum powder into the furnace body 41 in a jet flow spraying mode and/or feeding aluminum wires into the furnace body 41 in a wire feeding mode, so that the molten titanium-containing slag is subjected to reduction reaction, and the titanium-based alloy is formed.
According to the method, the molten titanium-containing slag is directly fed into the titanium alloy smelting furnace by using the molten titanium-containing slag supply unit, and then aluminum powder is blown into the furnace by using the aluminum powder supply unit and the jet flow blowing unit, or an aluminum wire is fed into the furnace by using the aluminum wire supply unit and the wire feeding unit to carry out reduction reaction. The two ways of adding aluminum can be carried out alternatively or simultaneously. In the actual reaction process, the molten titanium-containing slag can complete the initial reaction with the entering aluminum, and the thermite reaction is an exothermic reaction, so that the reduction reaction can be carried out on the premise of no other additional energy supplement, and the waste heat of the molten titanium-containing slag and the heat release in the reaction process can be effectively utilized, thereby saving the energy consumption in the production process of the titanium-based alloy. In the reduction reaction process, metal aluminum is selectively reduced in the molten titanium-containing slag, titanium and silicon oxides in the slag are reduced to form titanium and silicon, so that a titanium-based alloy or a titanium-aluminum-silicon alloy is formed, and oxides of aluminum, calcium and magnesium form aluminate to be left in the slag. Because of the utility model discloses directly adopt the mode of jetting aluminite powder and/or feeding aluminium wire in to the melting titanium-containing slag, the reaction kinetics condition is good, need not to contain the broken fine grinding of titanium-containing slag raw materials and prepares burden again. Along with the reaction, the produced titanium-based alloy can be fully settled in a molten pool, so that the recovery rate of valuable elements such as titanium is improved, and the produced waste residue can be directly used for building materials due to no harmful elements after water quenching.
In a word, utilize the utility model provides an above-mentioned method, can utilize the melting to contain titanium sediment direct production titanium base alloy, adopt the wire feeding method or efflux blowing method to add aluminium to the melting to contain titanium sediment in carry out reduction treatment and directly output titanium base alloy, have high efficiency, consume slowly, the simple advantage of process.
In a preferred embodiment, during the reduction reaction, aluminum powder is continuously injected or an aluminum wire is continuously fed; along with the reduction reaction, a molten pool in the furnace body 41 is a molten titanium-containing slag layer, a reduction tailing layer and a titanium-based alloy layer from top to bottom in sequence; when the aluminum powder is sprayed in a jet injection mode, the spraying position is positioned on the reduction tailings layer or the lower part of the molten titanium-containing slag layer; when the aluminum wire is fed in a wire feeding mode, the end of the aluminum wire is positioned on the reduction tailings layer or the lower part of the molten titanium-containing slag layer. The feeding mode is favorable for more stable reaction, is convenient for the sedimentation and discharge of the titanium-based alloy, and has promotion effect on the recovery rate of titanium.
In order to fully perform the reduction reaction, the feeding temperature of the molten titanium-containing slag is 1500-1550 ℃, and the temperature of the reduction reaction is 1500-1900 ℃, preferably 1700-1800 ℃. As mentioned above, the method of the utility model can effectively utilize the residual heat of the molten titanium-containing slag and the heat released in the aluminothermic reaction process, so that other heating measures are not needed. In the actual production process, the titanium-containing slag produced by treating the vanadium-titanium magnetite by a blast furnace process or a non-blast furnace process and the high-titanium slag produced by smelting the titanium concentrate can be directly put into the titanium-based alloy preparation mode in a molten state for production.
In a preferred embodiment, the particle size of the aluminum powder is 3-10 mm; the diameter of the aluminum wire is 1-50 mm. Therefore, the efficient operation of the reduction reaction is facilitated, meanwhile, the excessively violent reaction caused by the excessively fine aluminum powder is avoided, and the stability of the reaction is maintained. The aluminum content in the aluminum powder and the aluminum wire is preferably higher than 95%.
In order to promote the aluminum powder to be sprayed into the molten titanium-containing slag in the furnace more stably, in a preferred embodiment, when the aluminum powder is sprayed by means of jet spraying, the aluminum powder is sprayed by using inert gas as a carrier gas; preferably, the solid-gas ratio in the spraying process is 20-35 kg/m3. The blowing condition is favorable for the full reaction with slag in the aluminum particle floating process. Specific inert gases include, but are not limited to, argon and the like. The specific aluminum powder jet injection process can be top-blowing immersion injection, side-blowing immersion injection and top-side composite blowing immersion injection according to the arrangement position of the spray holes.
In a preferred embodiment, in the process of spraying aluminum powder and/or continuously feeding an aluminum wire, the added aluminum is 1.1-5 times of the theoretical aluminum amount required by reduction of titanium and silicon oxide in the molten titanium-containing slag; the time of the reduction reaction is 0.3-6 h. On the one hand, the titanium and silicon oxides in the slag are reduced more fully, and the surplus aluminum can directly form a titanium-based alloy with the titanium and silicon obtained by reaction, namely part of the aluminum is left in the reduction tailings in the form of oxides, and part of the aluminum enters the titanium-based alloy in the form of metal.
In a preferred embodiment, flue gas is generated in the reduction reaction process, and the method further comprises the steps of sequentially performing waste heat recovery and dust collection treatment on the flue gas; preferably, after the dust collecting treatment is performed, the method further includes a step of returning the dust-removing gas into the furnace body 41.
Preferably, the smoke dust obtained in the dust collection treatment process is returned to the furnace body as a raw material.
The device and the method are applicable to conventional titanium-containing slag in the field, for example, the titanium-containing slag can be titanium-containing slag produced by treating vanadium-titanium magnetite by a blast furnace process or a non-blast furnace process and high-titanium slag produced by smelting titanium concentrate, wherein the effect is more obvious for the titanium-containing slag produced by the vanadium-titanium magnetite with lower titanium grade. Preference is given to TiO in titanium-containing slag2SiO in an amount of 20 to 75 wt%2The content is 0.1 to 15% (wt). The titanium-based alloy produced by the process can be used for smelting titanium alloy, and the tailings can be used for producing building materials.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1
The device shown in figure 1 is adopted to treat the molten titanium-containing slag and TiO produced by smelting vanadium-titanium magnetite in a blast furnace at 1500 DEG C2About 24% SiO2The content is about 28%. The specific process comprises the following steps:
putting molten titanium-containing slag into a furnace body, adopting four spray guns to spray 5mm aluminum particles by using argon as carrier gas jet, adopting a side-blowing immersion spraying mode, and ensuring the solid-gas ratio to be 35kg/m3. The molten titanium-containing slag and sprayed aluminum particles are subjected to reduction reaction, and the temperature of a molten pool is about 1700 ℃. The continuous spraying position of the aluminum particles is positioned at the lower part of the molten titanium-containing slag layer (the lower part of the slag layer), and H/H is 1/5. The smelting process is continuous smelting, the sprayed aluminum amount is about 1.1-2 times of the theoretical aluminum amount required by reduction, the reaction and sedimentation time is 3 hours, and the obtained reduction tailings and the titanium-based alloy are periodically discharged. The flue gas is subjected to waste heat recovery, dust collection treatment and desulfurization purification to obtain regenerated argon and smoke dust, the regenerated argon is returned as circulating carrier gas, and the smoke dust is returned to the furnace as raw materials.
Calculated, the TiO in the titanium-containing slag is melted2And SiO284.2 percent and 85.8 percent of the aluminum is reduced to be metallic respectively, and the aluminum and the added aluminum form an aluminum-silicon-titanium alloy, wherein the aluminum consumption per ton slag is 246.05kg, and the titanium-based alloy with 51.2 percent of Ti, 10 percent of aluminum, 36.1 percent of silicon and about 3 percent of impurities is produced.
Example 2
The difference from the embodiment 1 is that:
putting molten titanium-containing slag into a furnace body, adopting four spray guns to spray 3mm aluminum particles by using argon as carrier gas jet, adopting a side-blowing immersion spraying mode, and enabling the solid-gas ratio to be 20kg/m3. The molten titanium-containing slag and sprayed aluminum particles are subjected to reduction reaction, and the temperature of a molten pool is about 1800 ℃. The continuous spraying position of the aluminum particles is positioned at the lower part of the molten titanium-containing slag layer (the lower part of the slag layer),and H/H is 1/3 in the spray hole position. The smelting process is continuous smelting, the sprayed aluminum amount is about 2.5-3 times of the theoretical aluminum amount required by reduction, the reaction and sedimentation time is 3 hours, and the obtained reduction tailings and the titanium-based alloy are periodically discharged. The flue gas is subjected to waste heat recovery, dust collection treatment and desulfurization purification to obtain regenerated argon and smoke dust, the regenerated argon is returned as circulating carrier gas, and the smoke dust is returned to the furnace as raw materials.
Calculated, the TiO in the titanium-containing slag is melted2And SiO286.3 percent and 86.9 percent of the aluminum is reduced to be metallic respectively, and the aluminum are added to form the aluminum-silicon-titanium alloy, wherein the aluminum consumption per ton of slag is 312kg, and the titanium-based alloy with 53.5 percent of Ti, 13 percent of aluminum, 30.5 percent of silicon and about 3 percent of impurities is produced.
Example 3
The difference from the embodiment 1 is that:
putting molten titanium-containing slag into a furnace body, adopting four spray guns to spray 10mm aluminum particles by using argon as carrier gas jet, adopting a side-blowing immersion spraying mode, and ensuring the solid-gas ratio to be 30kg/m3. The molten titanium-containing slag and sprayed aluminum particles are subjected to reduction reaction, and the temperature of a molten pool is about 1900 ℃. The continuous spraying position of the aluminum particles is positioned at the lower part of the molten titanium-containing slag layer (the lower part of the slag layer), and the H/H is 1/10 in the spraying position. The smelting process is continuous smelting, the sprayed aluminum amount is about 3-4 times of the theoretical aluminum amount required by reduction, the reaction and sedimentation time is 3 hours, and the obtained reduction tailings and the titanium-based alloy are periodically discharged. The flue gas is subjected to waste heat recovery, dust collection treatment and desulfurization purification to obtain regenerated argon and smoke dust, the regenerated argon is returned as circulating carrier gas, and the smoke dust is returned to the furnace as raw materials.
Calculated, the TiO in the titanium-containing slag is melted2And SiO287.4 percent and 88.2 percent of the aluminum is reduced to be metallic respectively, and the aluminum are added to form the aluminum-silicon-titanium alloy, wherein the aluminum consumption per ton of slag is 368kg, and the titanium-based alloy with 52.8 percent of Ti, 15 percent of aluminum, 30.2 percent of silicon and about 2 percent of impurities is produced.
Example 4
The device shown in figure 1 is adopted to treat the molten titanium-containing slag and TiO produced by smelting vanadium-titanium magnetite in an electric furnace at 1550 DEG C2About 51% SiO2In an amount of about15 percent. The specific process comprises the following steps:
introducing argon into the furnace to maintain an inert gas environment, putting the molten titanium-containing slag into the furnace body, simultaneously feeding 20mm aluminum wires into a molten pool by adopting 10 wire feeding devices, and carrying out reduction reaction on the molten titanium-containing slag and the fed aluminum wires, wherein the temperature of the molten pool is about 1750 ℃. The aluminum wire is continuously fed, and the end is positioned at the lower part of the molten titanium-containing slag layer. The smelting process is continuous smelting, the fed aluminum amount is about 2-3 times of the theoretical aluminum amount required by reduction, the reaction and sedimentation time is 4 hours, and TiO in slag2And SiO2The aluminum is reduced to be in a metal state, the aluminum and the silicon form an aluminum-titanium alloy with more added aluminum, and the obtained reduction tailings and the titanium-based alloy are discharged periodically. The flue gas is subjected to waste heat recovery, dust collection treatment and desulfurization purification to obtain regenerated argon and smoke dust, the regenerated argon returns to the furnace to maintain an inert environment, and the smoke dust returns to the furnace to serve as a raw material.
Calculated, the TiO in the titanium-containing slag is melted2And SiO287.2 percent and 89.8 percent of the aluminum is reduced to be metallic respectively, and the aluminum and the added aluminum form an aluminum-silicon-titanium alloy, wherein the aluminum consumption per ton slag is 354.59kg, and the titanium-based alloy with 68.9 percent of Ti, 15 percent of aluminum, 15.1 percent of silicon and about 1 percent of impurities is produced.
Example 5
The difference from the example 4 lies in:
introducing argon into the furnace to maintain an inert gas environment, putting the molten titanium-containing slag into the furnace body, simultaneously feeding 10mm aluminum wires into a molten pool by adopting 10 wire feeding devices, and carrying out reduction reaction on the molten titanium-containing slag and the fed aluminum wires, wherein the temperature of the molten pool is about 1700 ℃. The aluminum wire is continuously fed, and the end is positioned at the lower part of the molten titanium-containing slag layer. The smelting process is continuous smelting, the fed aluminum amount is about 1.1-2 times of the theoretical aluminum amount required by reduction, the reaction and sedimentation time is 6 hours, and TiO in slag2And SiO2The aluminum is reduced to be in a metal state, the aluminum and the silicon form an aluminum-titanium alloy with more added aluminum, and the obtained reduction tailings and the titanium-based alloy are discharged periodically. The flue gas is subjected to waste heat recovery, dust collection treatment and desulfurization purification to obtain regenerated argon and smoke dust, the regenerated argon returns to the furnace to maintain an inert environment, and the smoke dust returns to the furnace to serve as a raw material.
Calculated to meltTiO in titanium slag2And SiO285.9% and 86.5% of the aluminum is reduced to metallic state respectively, and the aluminum and the added aluminum form an aluminum-silicon-titanium alloy, wherein the aluminum consumption per ton slag is 267.2kg, and the titanium-based alloy with 65.4% of Ti, 12% of aluminum, 19.6% of silicon and about 3% of impurities is produced.
Example 6
The difference from the example 4 lies in:
introducing argon into the furnace to maintain an inert gas environment, putting the molten titanium-containing slag into the furnace body, simultaneously feeding 30mm aluminum wires into a molten pool by adopting 10 wire feeding devices, and carrying out reduction reaction on the molten titanium-containing slag and the fed aluminum wires, wherein the temperature of the molten pool is about 1900 ℃. The aluminum wire is continuously fed, and the end is positioned on the reduction tailing layer. The smelting process is continuous smelting, the fed aluminum amount is about 3-4 times of the theoretical aluminum amount required by reduction, the reaction and sedimentation time is 3 hours, and TiO in slag2And SiO2The aluminum is reduced to be in a metal state, the aluminum and the silicon form an aluminum-titanium alloy with more added aluminum, and the obtained reduction tailings and the titanium-based alloy are discharged periodically. The flue gas is subjected to waste heat recovery, dust collection treatment and desulfurization purification to obtain regenerated argon and smoke dust, the regenerated argon returns to the furnace to maintain an inert environment, and the smoke dust returns to the furnace to serve as a raw material.
Calculated, the TiO in the titanium-containing slag is melted2And SiO284.6 percent and 85.9 percent of the aluminum is reduced to be metallic respectively, and the aluminum and the added aluminum form an aluminum-silicon-titanium alloy, wherein the aluminum consumption per ton slag is 326.4kg, and the titanium-based alloy with the Ti content of 62.3 percent, the aluminum content of 18 percent, the silicon content of 17.7 percent and the impurity content of about 2 percent is produced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An apparatus for preparing titanium-based alloy by melting titanium-containing slag, comprising:
a molten titanium-containing slag supply unit (10) having a molten titanium-containing slag outlet;
an aluminum powder supply unit (20) and/or an aluminum wire supply unit (30), the aluminum powder supply unit (20) being for supplying aluminum powder, the aluminum wire supply unit (30) being for supplying an aluminum wire;
the titanium alloy smelting furnace (40) is provided with a furnace body (41), the furnace body (41) is provided with a molten titanium-containing slag inlet (411), and the molten titanium-containing slag inlet (411) is connected with the molten titanium-containing slag outlet; the titanium alloy smelting furnace (40) further comprises a jet flow injection unit (42) and/or a wire feeding unit (43), wherein an inlet of the jet flow injection unit (42) is connected with the aluminum powder supply unit (20), and an outlet of the jet flow injection unit (42) is connected with the inside of the furnace body (41); the inlet of the wire feeding unit (43) is connected with the aluminum wire supply unit (30), and the outlet is connected with the interior of the furnace body (41); the top of the furnace body (41) is also provided with a flue gas outlet (414);
an inert gas supply unit (50) having an outlet communicating with the furnace body (41);
and the inlet of the waste heat recovery unit (60) is connected with the smoke outlet (414).
2. The apparatus for preparing titanium-based alloy from molten titanium-containing slag according to claim 1, wherein said apparatus comprises said aluminum powder supply unit (20), said jet injection unit (42) comprises one or more jet lances, and said side wall and/or top wall of said furnace body (41) is further provided with injection holes (412) corresponding to said jet lances one to one, said jet lances being connected to said injection holes (412).
3. The apparatus for producing a titanium-based alloy according to claim 2, wherein said aluminum powder supply unit (20) and said jet blowing unit (42) are connected through a blowing line, and an outlet of said inert gas supply unit (50) is connected to said blowing line.
4. The apparatus for preparing titanium-based alloy from molten titanium-containing slag according to claim 2 or 3, wherein the spray holes (412) are arranged on the side wall, the height of the slag inside the furnace body (41) is recorded as H, the height of the spray holes (412) from the interface between the slag and the alloy inside the furnace body (41) is recorded as H, and H/H is 1/10-1/3.
5. The apparatus for producing titanium-based alloy from molten titanium-containing slag according to any one of claims 1 to 3, wherein said apparatus comprises said aluminum wire supply unit (30), one or more wire feeding holes (413) are provided on the top of said furnace body (41), and said aluminum wire supply unit (30) is connected to each of said wire feeding holes (413) for feeding said aluminum wire to the inside of said furnace body (41) through said wire feeding holes (413).
6. The apparatus for producing a titanium-based alloy from the molten titanium-containing slag according to any one of claims 1 to 3, further comprising:
and the inlet of the dust collector (70) is connected with the outlet of the waste heat recovery unit (60).
7. The apparatus for producing titanium-based alloy from molten titanium-containing slag according to any one of claims 1 to 3, wherein the furnace body (41) is further provided with a titanium-based alloy outlet (415) at the bottom and a tailings outlet (416) at the side, and the apparatus further comprises:
a titanium-based alloy receiving unit (80) connected to the titanium-based alloy outlet (415);
a tailings receiving unit (90) in communication with the tailings outlet (416).
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