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  • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
  • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
  • C25C7/02—Electrodes; Connections thereof
  • C25C7/025—Electrodes; Connections thereof used in cells for the electrolysis of melts
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
  • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
  • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
  • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
  • C25C3/12—Anodes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D25/00—Special casting characterised by the nature of the product
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  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C19/00—Alloys based on nickel or cobalt
  • C22C19/03—Alloys based on nickel or cobalt based on nickel
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C30/00—Alloys containing less than 50% by weight of each constituent
  • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C30/00—Alloys containing less than 50% by weight of each constituent
  • C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
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  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C38/00—Ferrous alloys, e.g. steel alloys
  • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C38/00—Ferrous alloys, e.g. steel alloys
  • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C38/00—Ferrous alloys, e.g. steel alloys
  • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C38/00—Ferrous alloys, e.g. steel alloys
  • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C38/00—Ferrous alloys, e.g. steel alloys
  • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C9/00—Alloys based on copper
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C9/00—Alloys based on copper
  • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent

Definitions

• the present invention relates to an inert alloy anode for electrolytic aluminum and a preparation method thereof, and belongs to the field of electrolytic aluminum industry. Background technique
• Electrolytic aluminum is obtained by electrolyzing alumina.
• the electrolytic aluminum is usually a conventional Hall- Heroult molten salt electrolytic aluminum process, which uses a cryolite-alumina melt electrolysis method, which is a cryolite Na 3 AlF 6 fluoride salt melt.
• A1 2 0 3 is dissolved in the fluoride salt, the carbon body is used as the anode, the aluminum liquid is used as the cathode, and after the strong direct current is applied, at the high temperature of 940-960 ° C, the two poles of the electrolytic cell An electrochemical reaction is carried out to obtain electrolytic aluminum.
• the carbon anode In the traditional electrolytic aluminum process, the carbon anode is continuously consumed in the electrolysis process, so that the carbon anode needs to be continuously replaced; and along with the electrolysis of the alumina, exhaust gas such as carbon dioxide, carbon monoxide and toxic hydrogen fluoride is continuously generated at the anode, and these gases are discharged. In the environment, it will cause harm to the environment and the health of humans and animals. Therefore, it is necessary to purify the exhaust gas generated by electrolytic aluminum before it can be discharged, thus increasing the input cost of the electrolytic aluminum production process.
• exhaust gas such as carbon dioxide, carbon monoxide and toxic hydrogen fluoride
• the consumption of anode material in the process of electrolytic aluminum is mainly caused by the oxidation reaction of the carbon anode material used in the conventional Hall-Herault process during the electrolysis process. Therefore, many researchers at home and abroad have studied the anode materials in order to reduce the consumption of anode materials in the process of electrolytic aluminum and reduce the emission of exhaust gas.
• the Chinese patent document CN102230189A discloses a cermet inert anode material for aluminum, and the anode material is Ni 2 0 3 and 204 cermet substrate Fe 2 0 3 to obtain NiO-NiFe as the preparation of starting materials, and then add The metal anode powder and the nano MO are prepared, and the obtained anode material has a conductivity of 102 ⁇ -cm.
• the cermet-based anode material in the above technology is not easily reacted with the electrolyte; but the cermet is used as the matrix.
• the anode material has high electrical resistance and high overvoltage.
• the anode produced in the process of electrolytic aluminum will lead to high power consumption and high cost of the process; and the anode material of the cermet substrate is not strong in thermal shock resistance, and the anode is in use.
• brittle cracking is liable to occur; in addition, it is also because the anode material of the cermet substrate is liable to be brittle, resulting in poor workability when the anode is fabricated from the above materials, and an anode of any shape cannot be obtained.
• China CN1443877A discloses an inert anode material for use in the electrolytic industries of aluminum, magnesium and rare earths, which is a binary or multicomponent alloy composed of metals such as chromium, nickel, iron, cobalt, titanium, copper, aluminum, manganese, and the like.
• Composition, the preparation method is a method of smelting or powder metallurgy.
• the prepared anode material has good electrical and thermal conductivity, and the anode generates oxygen during the electrolysis process, wherein the first example is 37 wt% cobalt, 18 wt% copper, 19 wt% nickel, 23% iron, and 3 wt% silver.
• the alloy material is made into an anode for electrolytic aluminum. In the electrolysis process at 850 ° C, the anode current density is 1.0 ⁇ /cm 2 , and the cell pressure is stably maintained at 4.1-4.5 V during the electrolysis process. The purity of aluminum is 98.35%.
• the alloy anode material when an alloy composed of a plurality of metals such as chromium, nickel, iron, cobalt, titanium, copper, aluminum, and manganese is used as the anode material for electrolytic aluminum, although the alloy anode material has higher conductivity than the cermet base anode material.
• the alloy material can be processed into any shape by smelting or powder metallurgy, and is not easily consumed in the electrolysis process as compared with the carbon anode material.
• a large amount of expensive metal materials are used in the preparation of the alloy anode, resulting in high cost of the anode material, which cannot meet the needs of industrialization costs; and the alloy anode made of the above metal component has low conductivity and overvoltage. High, increasing the power consumption of the process, can not meet the needs of the electrolytic aluminum process.
• an oxide film is formed on the surface of the alloy anode prepared in the prior art to date, and after the oxide film is destroyed, the anode material exposed on the surface is oxidized and supplemented with a new oxide. film.
• the alloy anode surface oxide film in the above technology has low oxidation resistance, is easy to further undergo oxidation reaction to form a product which is easily corroded by the electrolyte, and the oxide film has low stability and is easily detached from the anode electrode during electrolysis. After some oxide film is corroded or peeled off, the material exposed on the surface of the alloy anode reacts with oxygen to form a new oxide film. The replacement of the oxide film leads to continuous consumption of the anode material, poor corrosion resistance, and electrode life.
• the oxide film which is corroded or detached enters the liquid aluminum with the electrolysis process of alumina, thereby reducing the purity of the aluminum of the final product, so that the produced aluminum product cannot meet the requirements of national standards and cannot be directly used as a finished product. use.
• the first technical problem to be solved by the present invention is that the metal materials used in the alloy anodes in the prior art are expensive, the process cost is high, and the fabricated alloy anode has low conductivity and high overvoltage, which increases the process. Power consumption; Furthermore, an inert alloy anode for electrolytic aluminum with low cost and low overvoltage and a preparation method thereof are proposed.
• the second technical problem to be solved by the present invention is that the oxide film on the surface of the alloy anode in the prior art has low oxidation resistance and is easy to fall off, resulting in an oxide film which is continuously consumed, has poor corrosion resistance, and is corroded or peeled off.
• the purity of the aluminum of the final product is reduced; and further, an inert alloy anode for electrolytic aluminum for improving the corrosion resistance and the aluminum purity of the product is proposed, which is a surface-formed oxide film which has strong oxidation resistance and is not easy to fall off. Its preparation method.
• the present invention provides an inert alloy anode for electrolytic aluminum, the components of which include: Fe and Cu as main components; and Sn.
• the mass ratio of Fe, Cu and Sn is (23 to 40): (36 to 60): (0.2 to 5) or (40.01 to 80): (0.01 to 35.9): (0.01 to 0.19). Also included is Ni.
• the mass ratio of Fe, Cu, Ni and Sn is (23 ⁇ 40): (36 ⁇ 60): (14 ⁇ 28): (0.2-5) or (40.01 ⁇ 80): (0.01 ⁇ 35.9): ( 28.1 ⁇ 70): (0.01 ⁇ 0.19).
• the inert alloy anode is composed of Fe, Cu, Ni and Sn; wherein the content of Fe is 23 to 40% by weight, the content of Cu is 36 to 60% by weight, and the content of Ni is 14 to 28% by weight.
• the content of Sn is 0.2 to 5 wt%, or wherein the content of Fe is 40.01 to 71.88 wt%, the content of Cu is 0.01 to 31.88 wt%, and the content of Ni is 28.1 to 59.97 wt%.
• the content of Sn is 0.01 to 0.19 wt%.
• the inert alloy anode is composed of Fe, Cu, Ni, Sn and Al; wherein the Fe content is 23 to 40% by weight, the Cu content is 36 to 60% by weight, and the Ni content is 14 to 28% by weight.
• the content of the A1 is greater than zero and less than or equal to 4 wt%, the content of the Sn is 0.2 to 5 wt%, or the content of the Fe is 40.01 to 71.88 wt%, and the content of the Cu is 0.01 ⁇ 31.88 wt%, the content of Ni is 28.1 to 59.97 wt%, the content of the A1 is more than zero and less than or equal to 4 wt%, and the content of the Sn is 0.01 to 0.19 wt%. Also includes Y.
• the inert alloy anode is composed of Fe, Cu, Ni, Sn, Al and Y; wherein the content of Fe is 23 to 40% by weight, the content of Cu is 36 to 60% by weight, and the content of Ni is 14 ⁇ 28 wt%, the content of the A1 is greater than zero and less than or equal to 4 wt%, the content of the Y is greater than zero and less than or equal to 2 wt%, and the content of the Sn is 0.2 to 5 wt%, Or wherein the content of Fe is 40.01 to 71.88 wt%, the content of Cu is 0.01 to 31.88 wt%, the content of Ni is 28.1 to 59.97 wt%, and the content of the A1 is greater than zero and less than or Equal to 4 wt%, the content of Y is greater than zero and less than or equal to 2 wt%, and the content of Sn is 0.01 to 0.19 wt%.
• the method for preparing the inert alloy anode comprises the steps of: melting and mixing the Fe, Cu and Sn metals, respectively, and rapidly casting and rapidly cooling to obtain an inert alloy anode; or, after melting the Fe, Cu and Sn metals, After adding A1 or Y metal to melt and mixing uniformly, or first adding A1 metal to melt, then adding Y metal to melt and mixing uniformly, rapid casting and rapid cooling to obtain an inert alloy anode; or, melting Fe, Cu, Ni and Sn metal After mixing, casting to obtain an inert alloy anode; or, after melting and mixing Fe, Cu, Ni and Sn metal, adding A1 or Y metal to melt and mixing uniformly, or first adding A1 metal to melt, then adding Y metal to melt and mixing uniformly After that, casting is carried out to obtain an inert alloy anode.
• the beneficial effects of the inert alloy anode for electrolytic aluminum according to the present invention compared with the prior art are:
• the inert alloy anode for electrolytic aluminum according to the present invention, the composition of which comprises: Fe and Cu as main components, and further includes Sn.
• the inert alloy anode of the above components has low cost, low overvoltage, and low power consumption of the electrolytic aluminum process; since the anode material is an alloy composed of Fe, Cu and Sn, an oxide film formed on the surface of the inert alloy anode during electrolysis It has high oxidation resistance, is not easily corroded by electrolytes, and the formed oxide film is stable and does not easily fall off, so that the inert alloy anode has high oxidation resistance and corrosion resistance.
• the above-mentioned inert alloy anode has high oxidation resistance and corrosion resistance, and the anode material does not cause impurities mixed in the liquid aluminum due to corrosion or shedding, thereby ensuring the purity of the aluminum product, and the purity of the produced aluminum can be It reached 99.8%.
• the cost of the alloy anode is high, the overvoltage is high, and the process consumes a large amount of electricity.
• the oxide film on the surface of the alloy has low oxidation resistance and is easy to fall off, resulting in continuous consumption of the alloy anode, poor corrosion resistance, and corrosion or The detachment of the oxide film into the liquid aluminum reduces the problem of the purity of the final product aluminum.
• the inert alloy anode for electrolytic aluminum is composed of Fe, Cu, Ni and Sn, wherein the content of Fe is 23 to 40% by weight, and the content of Cu is 36 ⁇ 60wt%, the content of Ni is 14 ⁇ 28wt%, the content of Sn is 0.2 ⁇ 5wt%, or wherein the content of Fe is 40.01 ⁇ 71.88wt%, and the content of Cu is 0.01 ⁇ 31.88wt %, the content of Ni is 28.1 to 59.97 wt%, and the content of Sn is 0.01 ⁇ 0.19wt%.
• the alloy anode of the invention has Fe and Cu as main components, and the proportion of the alloy anode is high, which reduces the material cost of the inert alloy anode, and the inert alloy composed of the above metal components has high conductivity and low groove voltage.
• the electricity consumed by electrolytic aluminum is small, and the electricity consumption per ton of aluminum is ⁇ 11000kwh, which reduces the production cost of electrolytic aluminum.
• the prior art alloy anode is avoided to use a large amount of expensive metal materials, which leads to an increase in anode manufacturing cost; and the prepared alloy anode has low conductivity, electrolytic aluminum consumes large amount of electricity, increases cost, and cannot be applied in industrial production. problem.
• the added metal Ni can promote the bonding of other kinds of metals more firmly, and the added metal Sn ensures that the surface of the inert alloy anode can form an oxide film with high oxidation resistance, good corrosion resistance and high stability during electrolysis.
• the inert alloy anode for electrolytic aluminum wherein the inert alloy anode is composed of Fe, Cu, Ni, Sn, Al, and Y, wherein the Fe content is 23 to 40% by weight, the Cu
• the content is 36 to 60 wt%
• the content of Ni is 14 to 28 wt%
• the content of Al is less than or equal to 4 wt%
• the content of Y is less than or equal to 2 wt%
• the content of Sn is 0.2 to 5 wt.
• the content of Fe is 40.01 to 71.88 wt%
• the content of Cu is 0.01 to 31.88 wt%
• the content of Ni is 28.1 to 59.97 wt%
• the content of Al is greater than zero and
• the content of Y is greater than zero and less than or equal to 2 wt%
• the content of Sn is 0.01 to 0.19 wt%.
• the above inert alloy anode also has the advantages of low material cost and high electrical conductivity.
• the metal Al contained in the inert alloy anode has anti-oxidation effect and can be used as a reducing agent to generate metal heat with the metal oxide in the inert anode alloy. The reduction reaction ensures the percentage of each main component in the inert alloy anode.
• the added metal Y can control the crystal structure of the anode material during the preparation of the inert anode to achieve the purpose of oxidation resistance.
• the inert alloy anode for electrolytic aluminum according to the present invention, wherein the inert alloy anode has a melting point of 1360 to 1386 ° C, a specific resistance at 20 ° C of 68 to 76.8 Q*cm, and a density of 8.1 to 8.3. g/cm 3 .
• the prepared inert alloy anode has a high melting point and can meet the needs of the high temperature environment of the electrolytic aluminum; Moreover, the low overvoltage of the inert alloy anode can reduce the power consumption of the electrolytic aluminum process; the prepared inert alloy anode texture Uniform, the density ranges from 8.1 to 8.3 g/cm 3 , thus ensuring stable performance of the inert alloy anode.
• Example 1 23 parts by weight of a Fe metal block, 60 parts by weight of a Cu metal block, and 0.2 parts by weight of a Sn metal block were melted and uniformly mixed under high-speed electromagnetic stirring, and rapidly cast at a rate of 20-100 ° C / s. Rapid cooling gives a homogeneous alloy anode 1 with a uniform texture.
• the inert alloy anode had a density of 8.3 g/cm 3 , a specific resistance of 62 Q*cm, and a melting point of 1400 °C.
• Example 2 40 parts by weight of a Fe metal block, 36 parts by weight of a Cu metal block, and 5 parts by weight of a Sn metal block were melted and uniformly mixed under high-speed electromagnetic stirring, and rapidly cast at a rate of 20-100 ° C / s. Rapid cooling gives a homogeneous alloy anode 2 with a uniform texture.
• the inert alloy anode had a density of 7.8 g/cm 3 , a specific resistance of 82 Q*cm, and a melting point of 1369 °C.
• Example 3 30 parts by weight of a Fe metal block, 45 parts by weight of a Cu metal block, and 3 parts by weight of a Sn metal block were melted and uniformly mixed under high-speed electromagnetic stirring, and rapidly cast at a rate of 20-100 ° C / s. Rapid cooling gives a homogeneous alloy anode 3 of uniform texture.
• the inert alloy anode had a density of 7.9 g/cm 3 , a specific resistance of 86 Q*cm, and a melting point of 1390 °C.
• Example 4 30 parts by weight of a Fe metal block, 50 parts by weight of a Cu metal block, 20 parts by weight of Mo, and 5 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 4.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 78 ⁇ , and a melting point of 1370 °C.
• Example 5 23 parts by weight of the Fe metal block, 60 parts by weight of the Cu metal block, 14 parts by weight of Ni, and 3 parts by weight of the Sn metal block were melted and cast to obtain an inert alloy anode 5.
• the inert alloy anode had a density of 8.3 g/cm 3 , a specific resistance of 68 ⁇ , and a melting point of 1360 °C.
• Example 6 40 parts by weight of a Fe metal block, 36 parts by weight of a Cu metal block, 19 parts by weight of Ni, and 5 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 6.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 76.8 ⁇ , and a melting point of 1386 ° C.
• Example 7 25 parts by weight of a Fe metal block, 46.8 parts by weight of a Cu metal block, 28 parts by weight of Ni, and 0.2 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 7.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 72 ⁇ , and a melting point of 1,350 °C.
• Example 8 23 parts by weight of a Fe metal block, 60 parts by weight of a Cu metal block, 14 parts by weight of Ni, and 3 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 8.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 70 ⁇ , and a melting point of 1,330 °C.
• Example 9 40 parts by weight of a Fe metal block, 36 parts by weight of a Cu metal block, 19 parts by weight of Ni, and 5 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 9.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 73 ⁇ , and a melting point of 1,340 °C.
• Example 10 24 parts by weight of a Fe metal block, 47.8 parts by weight of a Cu metal block, 28 parts by weight of Ni, and 0.2 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 10.
• the inert alloy anode had a density of 8.0 g/cm 3 , a specific resistance of 74 ⁇ , and a melting point of 1,350 °C.
• Example 11 After 30 parts by weight of a Fe metal block, 41 parts by weight of a Cu metal block, and 5 parts by weight of a Sn metal block were melted, 3 parts by weight of an A1 metal block was further added to continue melting and uniformly mixed under high-speed electromagnetic stirring. Rapid casting, fast cooling An inert alloy anode 11 is obtained.
• the inert alloy anode has a density of 8.1 g/cm 3 , a specific resistance of 68 Mi>cm, and a melting point of 1370 ° C.
• Example 12 23 parts by weight of Fe metal block, 60 parts by weight of Cu metal block, and 14 parts by weight After Ni and 0.2 parts by weight of the Sn metal block were melted, 2.8 parts by weight of the A1 metal block was further added to continue melting, and casting was carried out to obtain an inert alloy anode 12.
• the inert alloy anode had a density of 8.4 g/cm 3 , a specific resistance of 69 Mi > cm, and a melting point of 1340 ° C.
• Example 13 After 40 parts by weight of a Fe metal block, 36 parts by weight of a Cu metal block, 15 parts by weight of Ni, and 5 parts by weight of a Sn metal block were melted, 4 parts by weight of an A1 metal block was further added to continue melting, and casting was carried out.
• Inert alloy anode 13 The inert alloy anode had a density of 8.15 g/cm 3 , a specific resistance of 69 Mi > cm, and a melting point of 1369 ° C.
• Example 14 After 36 parts by weight of a Fe metal block, 47 parts by weight of a Cu metal block, 14 parts by weight of Ni, and 2.9 parts by weight of a Sn metal block were melted, 0.1 part by weight of an A1 metal block was further added to continue melting, and casting was carried out.
• Inert alloy anode 14 The inert alloy anode had a density of 8.0 g/cm 3 , a specific resistance of 67.6 Q*cm, and a melting point of 1379 °C.
• Example 15 After 27 parts by weight of a Fe metal block, 50 parts by weight of a Cu metal block, and 4 parts by weight of a Sn metal block were melted, 1 part by weight of a Y metal block was further added to continue melting and uniformly mixed under high-speed electromagnetic stirring. Rapid casting, rapid cooling gives the inert alloy anode 15.
• the inert alloy anode has a density of 8.4 g/cm 3 , a specific resistance of 67 Q*cm, and a melting point of 1358 ° C.
• Example 16 35 parts by weight of Fe metal block, 45 parts by weight of Cu metal block, 24 parts by weight After Ni and 4 parts by weight of the Sn metal block were melted, 2 parts by weight of the Y metal block was further added to continue melting, and cast to obtain an inert alloy anode 16.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 70.9 Q*cm, and a melting point of 1375 °C.
• Example 17 After 25 parts by weight of a Fe metal block, 50 parts by weight of a Cu metal block, and 4 parts by weight of a Sn metal block were melted, 3 parts by weight of an A1 metal block was further added to continue melting, and finally 1 part by weight of a metal Y was added.
• Example 18 After 23 parts by weight of a Fe metal block, 60 parts by weight of a Cu metal block, 14 parts by weight of Ni, and 0.9 parts by weight of a Sn metal block were melted, 0.1 part by weight of an A1 metal block was further added to continue melting, and finally added. Two parts by weight of the Y metal block were melt-mixed and cast to obtain an inert alloy anode 18.
• the inert alloy anode had a density of 8.3 g/cm 3 , a specific resistance of 68 ⁇ , and a melting point of 1360 °C.
• Example 19 40 parts by weight of a Fe metal block, 36 parts by weight of a Cu metal block, 14.9 parts by weight of Ni, and 5 parts by weight of a Sn metal block were melted, and then 4 parts by weight of an A1 metal block was added to continue melting, and finally added.
• 0.1 part by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 19.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 76.8 ⁇ , and a melting point of 1386 ° C.
• Example 20 After 29 parts by weight of a Fe metal block, 38.3 parts by weight of a Cu metal block, 28 parts by weight of Ni, and 0.2 parts by weight of a Sn metal block were melted, 3.5 parts by weight of an A1 metal block was further added to continue melting, and finally added. One part by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 20.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 70 ⁇ , and a melting point of 1365 °C.
• Example 21 After 40 parts by weight of a Fe metal block, 36.5 parts by weight of a Cu metal block, 18 parts by weight of Ni, and 3 parts by weight of a Sn metal block were melted, 1.5 parts by weight of an A1 metal block was further added to continue melting, and finally added. One part by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 21.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 76.8 ⁇ , and a melting point of 1386 ° C.
• Example 22 After melting 24.3 parts by weight of a Fe metal block, 59 parts by weight of a Cu metal block, 14 parts by weight of Ni, and 0.2 parts by weight of a Sn metal block, 2 parts by weight of an A1 metal block was further added to continue melting, and finally added. 0.5 parts by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 22.
• the inert alloy anode has a density of 8.22 g/cm 3 , specific resistance It is 68.2 ⁇ , and has a melting point of 1360 °C.
• 1 part by weight is 10 g, and the inert anode alloy obtained by casting can be selected in any shape as needed.
• Example 23 40.01 parts by weight of a Fe metal block, 35.9 parts by weight of a Cu metal block, and 0.19 parts by weight of a Sn metal block were melted and uniformly mixed under high-speed electromagnetic stirring, and rapidly cast at a rate of 20-100 ° C / s. Rapid cooling results in an inert alloy anode 23 having a uniform texture.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of ⁇ , and a melting point of 1400 °C.
• Example 24 80 parts by weight of a Fe metal block, 0.01 part by weight of a Cu metal block, and 0.01 part by weight of a Sn metal block were melted and uniformly mixed under high-speed electromagnetic stirring, and rapidly cast at a rate of 20-100 ° C / s. Rapid cooling results in an inert alloy anode 24 having a uniform texture.
• the inert alloy anode had a density of 7.5 g/cm 3 , a specific resistance of 82 Q*cm, and a melting point of 1369 °C.
• Example 25 60 parts by weight of a Fe metal block, 25 parts by weight of a Cu metal block, and 0.1 part by weight of a Sn metal block were melted, mixed uniformly under high-speed electromagnetic stirring, and rapidly cast at a rate of 20-100 ° C / s. Rapid cooling results in a homogeneous alloy anode 25 having a uniform texture.
• the inert alloy anode had a density of 7.9 g/cm 3 , a specific resistance of 84 Q*cm, and a melting point of 1390 °C.
• Example 26 50 parts by weight of a Fe metal block, 30 parts by weight of a Cu metal block, 20 parts by weight of Mo, and 0.05 part by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 26.
• the inert alloy anode had a density of 8.4 g/cm 3 , a specific resistance of 78 ⁇ , and a melting point of 1370 °C.
• Example 27 40.01 parts by weight of a Fe metal block, 35.9 parts by weight of a Cu metal block, 70 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 27.
• the inert alloy anode had a density of 8.5 g/cm 3 , a specific resistance of 68 ⁇ , and a melting point of 1360 °C.
• Example 28 80 parts by weight of Fe metal block, 0.01 part by weight of Cu metal block, 28.1 parts by weight of Ni and 0.19 by weight The portion of the Sn metal block is melted and cast to obtain an inert alloy anode 28.
• the inert alloy anode had a density of 7.7 g/cm 3 , a specific resistance of 76.8 ⁇ , and a melting point of 1386 °C.
• Example 29 71.88 parts by weight of a Fe metal block, 0.01 part by weight of a Cu metal block, 28.1 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 29.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 72 ⁇ , and a melting point of 1,350 °C.
• Example 30 40.01 parts by weight of a Fe metal block, 31.88 parts by weight of a Cu metal block, 28.1 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 30.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 70 ⁇ , and a melting point of 1,330 °C.
• Example 31 40 parts by weight of a Fe metal block, 0.02 parts by weight of a Cu metal block, 59.97 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 31.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 73 ⁇ , and a melting point of 1,340 °C.
• Example 32 45 parts by weight of a Fe metal block, 4.81 parts by weight of a Cu metal block, 50 parts by weight of Ni, and 0.19 parts by weight of a Sn metal block were melted and cast to obtain an inert alloy anode 32.
• the inert alloy anode had a density of 8.0 g/cm 3 , a specific resistance of 74 ⁇ , and a melting point of 1,350 °C.
• Example 33 After 60 parts by weight of a Fe metal block, 35.9 parts by weight of a Cu metal block, and 0.1 part by weight of a Sn metal block were melted, 4 parts by weight of an A1 metal block was further added to continue melting and uniformly mixed under high-speed electromagnetic stirring. Rapid casting, rapid cooling gives the inert alloy anode 33.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 68 Q*cm, and a melting point of 1370 ° C.
• Example 34 40.01 parts by weight of Fe metal block, 27.7 parts by weight of Cu metal block, 28.1 parts by weight After Ni and 0.19 parts by weight of the Sn metal block are melted, 4 parts by weight of the A1 metal block is further added to continue melting, and casting is performed to obtain an inert alloy anode. Extreme 34.
• the inert alloy anode had a density of 8.4 g/cm 3 , a specific resistance of 69 Q*cm, and a melting point of 1340 °C.
• Example 35 After 71.88 parts by weight of a Fe metal block, 0.005 parts by weight of a Cu metal block, 28.1 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted, 0.005 parts by weight of an A1 metal block was further added to continue melting, and casting was carried out.
• the inert alloy anode had a density of 8.15 g/cm 3 , a specific resistance of 69 Q*cm, and a melting point of 1369 °C.
• Example 36 40.01 parts by weight of a Fe metal block, 31.88 parts by weight of a Cu metal block, 25.01 parts by weight of Ni, and 0.1 part by weight of a Sn metal block were melted, and then 3 parts by weight of an A1 metal block was further added to continue melting, and casting was carried out.
• Inert alloy anode 36 The inert alloy anode had a density of 8.0 g/cm 3 , a specific resistance of 67.6 Mi > cm, and a melting point of 1379 ° C.
• Example 37 After 66 parts by weight of Fe metal block, 31.88 parts by weight of Cu metal block, and 0.01 part by weight of Sn metal block were melted, 2 parts by weight of Y metal block was further added to continue melting and uniformly mixed under high-speed electromagnetic stirring. Rapid casting, rapid cooling results in an inert alloy anode 37.
• the inert alloy anode has a density of 8.4 g/cm 3 , a specific resistance of 67 Q*cm, and a melting point of 1358 ° C.
• Example 38 40 parts by weight of Fe metal block, 0.01 part by weight of Cu metal block, 59.97 parts by weight After Ni and 0.01 parts by weight of the Sn metal block were melted, 0.01 part by weight of the Y metal block was further added to continue melting, and cast to obtain an inert alloy anode 38.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 70.9 Mi > cm, and a melting point of 1375 ° C.
• Example 39 After 62 parts by weight of a Fe metal block, 31.88 parts by weight of a Cu metal block, and 0.19 parts by weight of a Sn metal block were melted, 4 parts by weight of an A1 metal block was further added to continue melting, and finally 2 parts by weight of a metal Y was added. Melt and mix uniformly under high-speed electromagnetic stirring, rapid casting, rapid cooling to obtain an inert alloy anode 39.
• the inert alloy anode had a density of 8.3 g/cm 3 , a specific resistance of 68.9 ⁇ , and a melting point of 1381 °C.
• Example 40 40 parts by weight of a Fe metal block, 25.7 parts by weight of a Cu metal block, 28.1 parts by weight of Ni, and 0.19 parts by weight of a Sn metal block were melted, and then 4 parts by weight of an A1 metal block was added to continue melting, and finally added. 2 parts by weight of Y gold The block is melt mixed and cast to obtain an inert alloy anode 40.
• the inert alloy anode had a density of 8.3 g/cm 3 , a specific resistance of 68 ⁇ , and a melting point of 1360 °C.
• Example 41 After 71.88 parts by weight of a Fe metal block, 0.005 parts by weight of a Cu metal block, 28.1 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted, 0.002 part by weight of an A1 metal block was further added to continue melting, and finally added. 0.003 parts by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 41.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 76.8 ⁇ , and a melting point of 1386 °C.
• Example 42 After 36.92 parts by weight of Fe metal block, 31.88 parts by weight of Cu metal block, 28.1 parts by weight of Ni, and 0.1 part by weight of Sn metal block were melted, 1 part by weight of A1 metal block was further added to continue melting, and finally added. Two parts by weight of the Y metal block were melt-mixed and cast to obtain an inert alloy anode 42.
• the inert alloy anode had a density of 8.2 g/cm 3 , a specific resistance of 70 ⁇ , and a melting point of 1365 °C.
• Example 43 After 39.81 parts by weight of a Fe metal block, 0.01 part by weight of a Cu metal block, 59.97 parts by weight of Ni, and 0.01 part by weight of a Sn metal block were melted, 0.1 part by weight of an A1 metal block was further added to continue melting, and finally added. 0.1 part by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 43.
• the inert alloy anode had a density of 8.1 g/cm 3 , a specific resistance of 76.8 ⁇ , and a melting point of 1386 °C.
• Example 44 After 45 parts by weight of a Fe metal block, 24.4 parts by weight of a Cu metal block, 29 parts by weight of Ni, and 0.1 part by weight of a Sn metal block were melted, 1 part by weight of an A1 metal block was further added to continue melting, and finally added. 0.5 parts by weight of the Y metal block was melt-mixed and cast to obtain an inert alloy anode 44.
• the inert alloy anode had a density of 8.22 g/cm 3 , a specific resistance of 68.2 ⁇ , and a melting point of 1360 °C. 1 part by weight of the above Examples 23-44 is 100 g, and the inert anode alloy obtained by casting can be selected in any shape as needed.
• the comparative example takes 37% of Co, 18 ⁇ % of Cu, 19% of Ni, 23% of Fe, and 3% of Ag alloy powder.
• the anode was prepared by powder metallurgy method, and an oxide film was formed on the surface of the metal anode by pre-oxidation using iooo °c to obtain an inert alloy anode.
• the test examples were as follows: inert alloy anode 1-44, A as anode, graphite as cathode, and anode and cathode were vertically inserted into a corundum-lined electrolytic cell with a pole pitch of 3 cm. At 760 ° C, the anode current density is 1.
• the composition is sodium fluoride 32% by weight, aluminum fluoride 57wt%, lithium fluoride 3wt%, potassium fluoride 4%% and alumina 4wt% electrolyte
• the electrolysis was carried out for up to 40 hours, and the test results are shown in the table below.

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