CN115478200A - Niobium-aluminum alloy and preparation method thereof - Google Patents
Niobium-aluminum alloy and preparation method thereof Download PDFInfo
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Abstract
The invention provides a niobium-aluminum alloy and a preparation method thereof, belonging to the technical field of alloy production. The niobium-aluminum alloy consists of the following components: nb:60.0 to 65.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.05 weight percent of N, and the balance of Al. The preparation method comprises the following steps: weighing a niobium source, an aluminum source, a slagging agent and a heating agent, and fully mixing to obtain a raw material mixture; preheating the raw material mixture to a first temperature to obtain a preheated raw material mixture; preparing a furnace body; putting the preheated raw material mixture into a furnace body, quickly igniting, and carrying out aluminothermic reduction reaction; and after the thermit reduction reaction is finished, standing and cooling to obtain the niobium-aluminum alloy product. The method solves the problem that niobium-aluminum alloy and slag cannot be well separated due to insufficient reaction heat when niobium-aluminum alloy is produced by an external furnace method, reduces the production cost of niobium-aluminum alloy, is beneficial to improving the production capacity of niobium-aluminum alloy, has low impurity content of the produced niobium-aluminum alloy, and meets the material demand of titanium alloy.
Description
Technical Field
The invention belongs to the technical field of alloy production, and particularly relates to a niobium-aluminum alloy and a preparation method thereof.
Background
The niobium-aluminum alloy used as an additive for preparing the high-niobium titanium-aluminum alloy has the characteristics of high melting point, low density and the like, and can effectively reduce the alloy segregation in the process of preparing the high-niobium titanium-aluminum alloy.
In the prior art, a chinese patent publication No. CN105385866A discloses a method and a system for preparing niobium-aluminum alloy, wherein the method comprises the following steps: mixing niobium pentoxide, aluminum, a small amount of fluxing agent and deslagging agent to form a mixed material; smelting the residual aluminum to form aluminum liquid; and adding the mixed material into aluminum liquid, generating niobium through thermite reduction reaction, uniformly distributing the niobium in the aluminum liquid, and reacting with redundant aluminum to generate niobium-aluminum alloy with uniform components. In the niobium-aluminum alloy prepared by the invention, the niobium is uniformly distributed, the segregation degree is small, the aluminum ablation amount is small, the eutectic temperature of the alloy is low, and the components are stable.
However, in the technical solution disclosed in the above patent, the melting process is completed in a medium frequency induction furnace, so that on one hand, the production cost is high, and on the other hand, the productivity of the niobium-aluminum alloy is limited. The research hopes that the production of the niobium-aluminum alloy is realized by an out-of-furnace method so as to improve the productivity and reduce the cost. However, since the unit heat of reaction for reducing niobium pentoxide with aluminum powder is not enough to support the normal reaction (the heat generated during the reduction of niobium pentoxide with aluminum is not only required to maintain the self-reaction, but also required to melt the rest aluminum powder, and ensure good separation of slag and alloy generated by the reaction), the slag and alloy cannot be separated well when the niobium-aluminum alloy is produced by the out-of-furnace method.
Disclosure of Invention
Based on the above, the invention provides a preparation method of niobium-aluminum alloy, which aims to solve the technical problem that slag and alloy cannot be well separated when niobium-aluminum alloy is produced by an out-of-furnace method in the prior art.
The invention also provides a niobium-aluminum alloy which is low in impurity content and uniform in components and meets the material requirements of titanium alloy.
The technical scheme for solving the technical problems is as follows:
a niobium-aluminum alloy consists of the following components: nb:60.0 to 65.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.05 weight percent of N, and the balance of Al and other inevitable impurities.
Preferably, consists of: nb:60.0 to 61.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.03 weight percent of N, and the balance of Al and other inevitable impurities.
A preparation method of the niobium-aluminum alloy comprises the following steps of:
s01, weighing a niobium source, an aluminum source, a slagging agent and a heating agent, and fully mixing to obtain a raw material mixture;
s02, preheating the raw material mixture to a first temperature to obtain a preheated raw material mixture;
s03, preparing a furnace body;
s04, putting the preheated raw material mixture into a furnace body, quickly igniting, and carrying out aluminothermic reduction reaction;
and S05, after the thermit reduction reaction is finished, standing and cooling to obtain the niobium-aluminum alloy product.
Preferably, in the raw material mixture, the mass contents of the components are as follows: 40-50% of niobium source, 35-45% of aluminum source, 5-10% of slagging agent and 6-12% of exothermic agent.
Preferably, the unit heat of reaction of the raw material mixture is 3000kJ/kg-3300kJ/kg.
Preferably, the heat generating agent is at least one selected from the group consisting of saltpeter, sodium nitrate, potassium chlorate and sodium chlorate.
Preferably, the slagging agent is selected from at least one of calcium oxide and calcium fluoride.
Preferably, in step S02, the first temperature is 100 ℃ to 120 ℃.
Preferably, in step S03, the "preparation furnace body" includes: preheating the furnace body to a second temperature of 150-200 ℃.
Preferably, in step S01, the niobium source is Nb with purity of more than or equal to 99 percent 2 O 5 The aluminum source is aluminum particles with the purity of more than or equal to 99.8 percent.
Compared with the prior art, the invention has at least the following advantages:
the invention provides a niobium-aluminum alloy which comprises the following components in parts by weight: nb:60.0wt% -65.0wt%, fe is less than or equal to 0.10wt%, si is less than or equal to 0.15wt%, C is less than or equal to 0.10wt%, O is less than or equal to 0.05wt%, N is less than or equal to 0.05wt%, and the balance is Al and other inevitable impurities, so that the impurity content is low, the components are uniform, and the material requirement of the titanium alloy is met.
The invention also provides a preparation method of the niobium-aluminum alloy, which is characterized in that the niobium-aluminum alloy is produced by adopting an external method, the heating agent is added into the reaction raw materials, and the raw materials are preheated, so that the problem that the niobium-aluminum alloy and slag cannot be well separated due to insufficient reaction heat during the aluminothermic reduction reaction of a niobium source and an aluminum source when the niobium-aluminum alloy is produced by adopting the external method is solved.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The technical solutions of the present invention will be further described below with reference to examples of the present invention, which is not limited to the following specific embodiments.
In one embodiment, a niobium-aluminum alloy comprises the following components: nb:60.0 to 65.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.05 weight percent of N, and the balance of Al and other inevitable impurities.
Preferably, the composition consists of the following components: nb:60.0 to 61.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.03 weight percent of N, and the balance of Al and other inevitable impurities.
The niobium-aluminum alloy provided by the invention has the nominal Nb content of 60 percent and has lower impurity content, particularly, in the niobium-aluminum alloy, the O content is less than or equal to 0.05 percent by weight, the N content is less than or equal to 0.05 percent by weight (more preferably, the N content is less than or equal to 0.03 percent by weight), the components are uniform, and the material requirements of titanium alloy are met.
In another embodiment of the present invention, a method for preparing niobium-aluminum alloy with low cost and high productivity is provided, wherein the method for preparing niobium-aluminum alloy by an out-of-furnace method comprises the following steps:
s01, weighing a niobium source, an aluminum source, a slagging agent and a heating agent, and fully mixing to obtain a raw material mixture.
Preferably, the niobium source is Nb with the purity of more than or equal to 99.0 percent 2 O 5 The aluminum source is aluminum particles with the purity of more than or equal to 99.8 percent, the slag former is selected from at least one of calcium oxide, AS-AZ6, silicate, dolomite and fluorite, and the heating agent is selected from at least one of saltpeter, sodium nitrate, potassium chlorate and sodium chlorate. In the implementation particles of the invention, the slag former selects calcium oxide with the purity of more than or equal to 93.0 percent, the heating agent selects saltpeter with the potassium nitrate content of more than or equal to 99.0 percent, and the skilled person can understand that the aluminum powder reduces Nb 2 O 5 Formation of Al 2 O 3 Due to Al 2 O 3 Has a high melting point (2050 ℃), is not beneficial to alloy sedimentation, and is added with a proper amount of slag former and Al 2 O 3 The eutectic slag is formed, which is beneficial to alloy sedimentation, improves the product yield and is also beneficial to the separation of slag and alloy. On the basis, the slag former can be selected from any slag former capable of being mixed with Al 2 O 3 Substances forming eutectic slag. The heat generating agent mainly has the function of generating exothermic reaction with reaction raw materials or reaction products to supplement heat for a reaction system and support the normal operation of thermite reduction reaction, and on the basis, the skilled person can reasonably select substances such as saltpeter, sodium nitrate, potassium chlorate, sodium chlorate and the like.
In the present invention, the chemical reaction process and the energy transfer process thereof occur as follows:
it should be noted that in the present invention, the potassium oxide, which is the reaction product of the niter and the aluminum, can further serve as a slag forming agent, and also facilitates the separation of slag and alloy.
In order to control the impurity content, especially the content of Fe, si, and C, in the niobium-aluminum alloy product, the impurity content in the raw materials needs to be strictly controlled, and in a preferred embodiment, the quality of each raw material is as follows:
Nb 2 O 5 ：Nb 2 O 5 ≥99.0％、F≤1.50％、Si≤0.10％、C≤0.05％、S≤0.03％、P≤0.05％、W≤0.10％、Mn≤0.10％；
al: more than or equal to 99.8 percent of Al, less than or equal to 0.10 percent of Fe, less than or equal to 0.05 percent of Si, and the particle size is as follows: 10-80 meshes;
CaO：CaO≥93.0％、Fe 2 O 3 ≤0.15％、SiO 2 not more than 0.40 percent, activity degree not less than 330ml and granularity not more than 1mm;
saltpeter: potassium nitrate (KNO) 3 ) The content is more than or equal to 99.0 percent, the water content is less than or equal to 0.30 percent, the content of chloride (calculated by Cl) is less than or equal to 0.10 percent, and the content of water-insoluble substances is less than or equal to 0.05 percent.
In some preferred embodiments, the raw material mixture formed after the niobium source, the aluminum source, the slagging agent and the heat generating agent are mixed comprises the following components in percentage by mass: 40-50% of niobium source, 35-45% of aluminum source, 5-10% of slagging agent and 6-12% of exothermic agent.
It will be understood by those skilled in the art that the above raw material mixture ratio can be used to produce niobium-aluminum alloy with nominal niobium content of 60%, such as niobium-aluminum alloy with different nominal niobium content, which can be realized by adjusting the mixture ratio of niobium source, aluminum source, slag former and heat generating agent.
Further, in order to ensure the normal operation of the thermite reduction reaction, the unit reaction heat of the raw material mixture is 3000kJ/kg-3300kJ/kg. If the unit reaction heat of the furnace charge is too low, the viscosity of the slag is too high, the fluidity is not good, the alloy sedimentation effect is influenced, and part of alloy particles are mixed in the slag, so that the product yield is influenced. If the unit reaction heat of the furnace charge is too low, the impurity content in the product is influenced, and particularly the gas impurity content can exceed the standard. If the unit reaction heat of the charging materials is too high, the reaction process is too violent, the splashing loss is aggravated, and the yield of the product is influenced. The unit reaction heat of the furnace charge is too high, the segregation of alloy components is increased, and the uniformity and consistency of products are influenced. Meanwhile, in the invention, if the unit reaction heat is high, more heating agents are added, and the N content and the O content in the product are easily exceeded by the more heating agents.
S02, preheating the raw material mixture to a first temperature to obtain the preheated raw material mixture.
Preferably, the first temperature is 100 ℃ to 120 ℃, for example, the raw material mixture is preheated to 120 ℃, so as to obtain a preheated raw material mixture.
The preheating of the raw material mixture is a key step for preparing the niobium-aluminum alloy with low impurity content, particularly the niobium-aluminum alloy with low N content and low O content. Experiments show that under the same conditions, if the raw material mixture is not preheated, the N content and the O content in the prepared product are both easy to exceed 0.05wt%.
S03, preparing a furnace body.
Specifically, the furnace body is placed into a slag tank filled with high-purity alumina, the bottom and the outer edge of the furnace body are filled and tamped with the high-purity alumina, and the high-purity alumina is obtained by crushing alumina slag generated by self reaction of niobium-aluminum alloy. Preferably, in order to further reduce heat loss and ensure normal operation of aluminothermic reduction reaction, the furnace body is preheated to a second temperature, wherein the second temperature is 150-200 ℃.
The high-purity alumina slag generated by the reaction of the niobium-aluminum alloy is used as a furnace body for niobium-aluminum alloy production reaction, so that the introduction of Fe and Si can be further prevented, and the impurity content of niobium-aluminum alloy products can be reduced. Preferably, the furnace body is a furnace body with a graphite lining, so that the introduction of C is further reduced, and the impurity content is reduced.
And S04, putting the preheated raw material mixture into a furnace body, quickly igniting, and carrying out aluminothermic reduction reaction.
And S05, after the aluminothermic reduction reaction is finished, standing and cooling to obtain the niobium-aluminum alloy product.
The preparation method of the niobium-aluminum alloy provided by the invention effectively solves the problem of low unit reaction heat in the preparation process of the niobium-aluminum alloy, adopts an external furnace method for smelting directly without adding smelting equipment independently, has the advantages of simple process, convenient operation and low cost, and the prepared niobium-aluminum alloy product has low impurity content and is suitable for producing titanium alloy and high-temperature alloy.
The technical scheme and technical effects of the present invention are further described below by specific experimental examples.
In the experimental examples of the present invention, the selected raw materials have the following qualities:
Nb 2 O 5 ：Nb 2 O 5 ≥99.0％、F≤1.50％、Si≤0.10％、C≤0.05％、S≤0.03％、P≤0.05％、W≤0.10％、Mn≤0.10％；
al: more than or equal to 99.8 percent of Al, less than or equal to 0.10 percent of Fe, less than or equal to 0.05 percent of Si, and the particle size is as follows: 10-80 meshes;
CaO：CaO≥93.0％、Fe 2 O 3 ≤0.15％、SiO 2 not more than 0.40 percent, activity degree not less than 330ml and granularity not more than 1mm;
saltpeter: potassium nitrate (KNO) 3 ) The content is more than or equal to 99.0 percent, the water content is less than or equal to 0.30 percent, the content of chloride (calculated by Cl) is less than or equal to 0.10 percent, and the content of water-insoluble substances is less than or equal to 0.05 percent.
The furnace body selected in the experimental example of the invention is a furnace body with a graphite lining.
Comparative example 1
30kg of Nb 2 O 5 26.5kg of aluminum particles and 4.8kg of CaO are added into a mixer, the mixer is started to mix for 30min, the mixed materials are put into a special stainless steel barrel and put into a baking oven, the stainless steel barrel is preheated for 2 hours at 120 ℃, the oven body is cleaned and put into the baking oven to be preheated for 2 hours at 150 ℃, and the preheated materials are mixedThe furnace body is taken out and put into a slag tank filled with high-purity alumina, the bottom and the outer edge of the furnace body are filled and tamped with the high-purity alumina, and the high-purity alumina is obtained by crushing alumina slag generated by the self reaction of niobium-aluminum alloy. The preheated materials are put into a furnace body, the furnace is quickly ignited, aluminothermic reduction reaction occurs, and slag and alloy are mixed into a whole and are not easy to separate.
Comparative example No. two
50kg of Nb 2 O 5 43.7kg of aluminum particles, 7kg of CaO and 11kg of saltpeter are added into a mixer, the mixer is started to mix for 60min, the furnace body is cleaned and then put into an oven for preheating, the furnace body is preheated for 2 hours at 150 ℃, the preheated furnace body is taken out and put into a slag tank filled with high-purity alumina, the bottom and the outer edge of the furnace body are filled and tamped with the high-purity alumina, and the high-purity alumina is obtained by crushing alumina slag generated by the self-reaction of niobium-aluminum alloy. And (3) putting the mixed materials into a furnace body, quickly igniting the furnace to perform aluminothermic reduction reaction, standing after the reaction is finished, and cooling for 40 hours to obtain 50.2kg of niobium-aluminum alloy products, wherein the component detection results are shown in table 1.
Experimental example 1
50kg of Nb 2 O 5 43.7kg of aluminum particles, 7kg of CaO and 8kg of saltpeter are added into a mixer, the mixer is started to mix for 60min, the mixed materials are put into a special stainless steel barrel and put into a baking oven, the stainless steel barrel is preheated for 3 hours at 120 ℃, the furnace body is cleaned and then put into the baking oven for preheating for 2 hours at 150 ℃, the preheated furnace body is taken out and put into a slag groove filled with high-purity aluminum oxide, the bottom and the outer edge of the furnace body are filled and tamped by the high-purity aluminum oxide, and the high-purity aluminum oxide is obtained by crushing aluminum oxide slag generated by the self reaction of niobium-aluminum alloy. And (3) putting the preheated material into a furnace body, quickly igniting the furnace to perform aluminothermic reduction reaction, standing after the reaction is finished, and cooling for 30 hours to obtain 51.5kg of niobium-aluminum alloy products, wherein the component detection results are shown in table 1.
Experimental example two
30kg of Nb 2 O 5 26.5kg of aluminum particles, 4.8kg of CaO and 5.5kg of saltpeter are added into a mixer, the mixer is started to mix for 30min, the mixed materials are put into a special stainless steel barrel and put into an oven, the mixture is preheated for 2 hours at 120 ℃, the oven body is cleaned and then put into the oven to be preheated, the mixture is preheated for 2 hours at 150 ℃, and the preheating is carried out for 2 hoursAnd taking out the good furnace body, putting the furnace body into a slag tank filled with high-purity alumina, filling and compacting the bottom and the outer edge of the furnace body by using the high-purity alumina, and crushing the high-purity alumina into alumina slag generated by the self reaction of the niobium-aluminum alloy. And (3) putting the preheated materials into a furnace body, quickly igniting the furnace to perform aluminothermic reduction reaction, standing and cooling for 22 hours after the reaction is finished to obtain 31.8kg of niobium-aluminum alloy products. The results of component detection are shown in Table 1.
For comparison, the amount of the above-mentioned saltpeter was changed to 8kg without preheating the raw materials.
Experimental example III
40kg of Nb 2 O 5 34kg of aluminum particles, 7.2kg of CaO and 6.8kg of saltpeter are added into a mixer, the mixer is started to mix for 40min, the mixed materials are put into a special stainless steel barrel and put into an oven, the stainless steel barrel is preheated for 2 hours at 120 ℃, the oven body is cleaned and then put into the oven to be preheated, the oven body is preheated for 2 hours at 150 ℃, the preheated oven body is taken out and put into a slag groove filled with high-purity aluminum oxide, the bottom and the outer edge of the oven body are filled and tamped with the high-purity aluminum oxide, and the high-purity aluminum oxide is obtained by crushing aluminum oxide slag generated by the self reaction of niobium-aluminum alloy. And (3) putting the preheated materials into a furnace body, quickly igniting the furnace to perform aluminothermic reduction reaction, standing and cooling for 25 hours after the reaction is finished to obtain 42.1kg of niobium-aluminum alloy products. The results of component detection are shown in Table 1.
For comparison, the amount of the above saltpeter was changed to 9.5kg without preheating the raw materials.
Experimental example four
50kg of Nb 2 O 5 43kg of aluminum particles, 8.5kg of CaO and 9kg of saltpeter are added into a mixer, the mixer is started to mix materials for 50min, the mixed materials are put into a special stainless steel barrel and put into an oven, the materials are preheated for 3 hours at 120 ℃, the oven body is cleaned and put into the oven to be preheated, the materials are preheated for 3 hours at 150 ℃, the preheated oven body is taken out and put into a slag groove filled with high-purity aluminum oxide, the bottom and the outer edge of the oven body are filled and tamped with the high-purity aluminum oxide, and the high-purity aluminum oxide is obtained by crushing aluminum oxide slag generated by the self reaction of niobium-aluminum alloy. And (3) putting the preheated materials into a furnace body, quickly igniting the furnace to perform aluminothermic reduction reaction, standing and cooling for 22 hours after the reaction is finished to obtain 53.5kg of niobium-aluminum alloy products. It is composed ofThe component detection results are shown in Table 1.
For comparison, the amount of the above-mentioned saltpeter was changed to 12.6kg without preheating the raw materials.
Table 1 shows the raw material compositions, reaction conditions, and the results of measurements of the obtained niobia-aluminum alloy products for each comparative example and experimental example.
TABLE 1 measurement results of Nb-Al alloy products
From Table 1, when no exothermic compound (saltpeter) was added to the reaction mixture, the thermite reduction reaction did not proceed normally, and the alloy liquid and slag were not separated smoothly.
Therefore, when the niobium-aluminum alloy is produced by the out-of-furnace method, a heating agent (saltpeter) is added. However, if only the heating agent (saltpeter) is added to make the unit reaction heat of the reaction system reach the requirement of easily separating the alloy liquid from the slag, the O content and the N content in the prepared niobium-aluminum alloy are easily out of limits, so that the content of non-metal impurities in the niobium-aluminum alloy is high, and the production requirement of titanium alloy and high-temperature alloy cannot be met.
The raw materials are preheated, so that the using amount of a heat generating agent (saltpeter) is reduced, and the content of O and the content of N in the prepared niobium-aluminum alloy are controlled to be in a relatively low range. In the experimental examples of the present invention, the niobium-aluminum alloy contained O in an amount of 0.05wt% or less, N in an amount of 0.05wt% or less, and even N in an amount of 0.03wt% or less.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The niobium-aluminum alloy is characterized by comprising the following components in parts by weight: nb:60.0 to 65.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.05 weight percent of N, and the balance of Al and other inevitable impurities.
2. The niobium aluminum alloy of claim 1, consisting of: nb:60.0 to 61.0 weight percent, less than or equal to 0.10 weight percent of Fe, less than or equal to 0.15 weight percent of Si, less than or equal to 0.10 weight percent of C, less than or equal to 0.05 weight percent of O, less than or equal to 0.03 weight percent of N, and the balance of Al and other inevitable impurities.
3. A method for producing the niobium-aluminum alloy as claimed in claim 1 or 2, characterized by comprising the steps of, by an out-of-furnace method:
s01, weighing a niobium source, an aluminum source, a slagging agent and a heating agent, and fully mixing to obtain a raw material mixture;
s02, preheating the raw material mixture to a first temperature to obtain a preheated raw material mixture;
s03, preparing a furnace body;
s04, putting the preheated raw material mixture into a furnace body, quickly igniting, and carrying out aluminothermic reduction reaction;
and S05, after the thermit reduction reaction is finished, standing and cooling to obtain the niobium-aluminum alloy product.
4. The method for preparing the niobium-aluminum alloy as claimed in claim 3, wherein the raw material mixture comprises the following components in percentage by mass: 40-50% of niobium source, 35-45% of aluminum source, 5-10% of slagging agent and 6-12% of exothermic agent.
5. The method of claim 4, wherein the raw material mixture has a specific heat of reaction of 3000kJ/kg to 3300kJ/kg.
6. The method for producing an aluminum niobium alloy as claimed in claim 4 or 5, wherein the heat generating agent is at least one selected from the group consisting of saltpeter, sodium nitrate, potassium chlorate and sodium chlorate.
7. The method for preparing an aluminum niobium alloy as claimed in claim 4 or 5, wherein the slag former is at least one selected from calcium oxide and calcium fluoride.
8. The method of claim 3, wherein the first temperature is 100 ℃ to 120 ℃ in step S02.
9. The method of claim 3, wherein the step S03 of preparing the furnace body comprises:
preheating the furnace body to a second temperature, wherein the second temperature is 150-200 ℃.
10. The method of claim 3, wherein in step S01, the Nb source is Nb with a purity of 99% or more 2 O 5 And the aluminum source is aluminum particles with the purity of more than or equal to 99.8 percent.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629339A (en) * | 2003-12-15 | 2005-06-22 | 张忠士 | An Al-Nb intermediate alloy and process for preparing same |
| CN102560213A (en) * | 2012-01-19 | 2012-07-11 | 上海康臣特种金属材料有限公司 | Aluminum-niobium interalloy and preparation method thereof |
| CN113265572A (en) * | 2021-04-12 | 2021-08-17 | 中色（宁夏）东方集团有限公司 | Low-aluminum niobium iron and production method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629339A (en) * | 2003-12-15 | 2005-06-22 | 张忠士 | An Al-Nb intermediate alloy and process for preparing same |
| CN102560213A (en) * | 2012-01-19 | 2012-07-11 | 上海康臣特种金属材料有限公司 | Aluminum-niobium interalloy and preparation method thereof |
| CN113265572A (en) * | 2021-04-12 | 2021-08-17 | 中色（宁夏）东方集团有限公司 | Low-aluminum niobium iron and production method thereof |
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