CN113264551A - Preparation method of potassium titanate and application of potassium titanate in welding electrode - Google Patents
Preparation method of potassium titanate and application of potassium titanate in welding electrode Download PDFInfo
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- CN113264551A CN113264551A CN202110545183.5A CN202110545183A CN113264551A CN 113264551 A CN113264551 A CN 113264551A CN 202110545183 A CN202110545183 A CN 202110545183A CN 113264551 A CN113264551 A CN 113264551A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/003—Titanates
- C01G23/005—Alkali titanates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
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Abstract
The invention discloses a preparation method of potassium titanate and application of the potassium titanate in welding electrodes, and belongs to the technical field of potassium titanate. The method comprises the steps of taking potassium oxide and titanium dioxide as raw materials, taking KCl-KF as a cosolvent, uniformly mixing the raw materials, adding the mixture into a polypropylene solution, carrying out wet grinding treatment, sintering, and carrying out post-treatment to obtain the potassium titanate. According to the invention, the polypropylene solution is added into the materials in the preparation of the potassium titanate for slurry grinding, so that the mixing degree of the raw materials is increased; the potassium titanate is applied to the preparation of the welding electrode, the arc voltage of the welding electrode is stable, the dust content is low, the sulfur content and the phosphorus content are both less than 0.015 percent, and the overall performance is excellent.
Description
Technical Field
The invention belongs to the technical field of potassium titanate, and particularly relates to a preparation method of potassium titanate and application of the potassium titanate in an electric welding rod.
Background
The potassium titanate is used as the additive of the welding electrode, has the functions of reducing arc voltage, reducing splashing and the like, can obtain the welding electrode with better performance, and achieves the effect of fine welding seams. The quality requirement of potassium titanate for welding electrodes is high, the performance of the potassium titanate is influenced by the preparation method of the potassium titanate, the preparation method generally comprises a hydrothermal method, a sintering method, a flux method and the like, wherein the flux method is a common method for synthesizing the potassium titanate, but the potassium titanate prepared by the method in the prior art is poor in performance when being used as an additive for the welding electrodes, and further application of the potassium titanate is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a preparation method of potassium titanate. The invention also aims to solve the technical problem of application of the potassium titanate in the welding electrode.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the potassium titanate is prepared by taking potassium oxide and titanium dioxide as raw materials and KCl-KF as a cosolvent, uniformly mixing the raw materials, adding the mixture into a polypropylene solution, carrying out wet grinding treatment, sintering, and carrying out post-treatment.
According to the preparation method of the potassium titanate, the wet grinding treatment is divided into two times, drying is carried out after the first wet grinding is finished, and the wet grinding treatment is carried out again after the polypropylene solution is added again.
According to the preparation method of the potassium titanate, mechanical ball milling is adopted in the first wet milling process, a mode of mixing large balls and small balls is adopted, the diameter of the large balls is 50mm, the diameter of the small balls is 20mm, the ball milling rotation speed is 500-800 rpm, the ball milling time is 3-5 h, and the ball-to-material ratio is 5: 1-10: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 100-300 rpm, the ball milling time is 1-3 h, and the ball-to-material ratio is 10: 1-20: 1.
According to the preparation method of the potassium titanate, during first wet grinding, the mass ratio of a polypropylene solution to a dry material is 3: 1-10: 1; and during the second wet grinding, the mass ratio of the polypropylene solution to the dry material is 1: 1-5: 1.
According to the preparation method of the potassium titanate, the molar ratio of the potassium oxide to the titanium dioxide is 1: 2-1: 5; the dosage of the cosolvent accounts for 1-10% of the mass of the main material.
According to the preparation method of the potassium titanate, the sintering temperature is 800-1250 ℃, and the sintering time is 3-8 hours.
The preparation method of the potassium titanate comprises the following steps: dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain potassium hexatitanate.
The preparation method of the potassium titanate comprises the following steps:
(1) weighing potassium oxide, titanium dioxide and KCl-KF, and uniformly mixing; then adding the polypropylene solution into the mixture, and uniformly stirring; the molar ratio of the potassium oxide to the titanium dioxide is 1: 2-1: 5, and the dosage of KCl-KF is 1-10% of the mass of the main material; the mass ratio of the polypropylene solution to the mixture is 3: 1-10: 1;
(2) wet grinding the uniformly stirred slurry for the first time, and drying after the wet grinding is finished; the first wet grinding adopts a mode of mixing big balls and small balls, the diameter of the big balls is 50mm, the diameter of the small balls is 20mm, the ball-milling rotating speed is 500-800 rpm, the ball-milling time is 3-5 h, and the ball-material ratio is 5: 1-10: 1;
(3) adding a polypropylene solution into the material dried in the step (2), uniformly stirring and mixing, and then carrying out second wet grinding; the mass ratio of the polypropylene solution to the dried material is 1: 1-5: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 100-300 rpm, the ball milling time is 1-3 h, and the ball-to-material ratio is 10: 1-20: 1;
(4) drying to constant weight after second wet grinding is finished, and then sintering for 3-8 h at the temperature of 800-1250 ℃;
(5) dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain the potassium hexatitanate.
The potassium hexatitanate prepared by the method.
The application of the potassium hexatitanate in the welding electrode.
Has the advantages that: compared with the prior art, the invention has the advantages that:
in the invention, the polypropylene solution is added into the materials in the preparation of the potassium titanate, so that the strength of the raw materials is enhanced; the mixing degree of the raw materials is increased by adopting a slurry grinding mode in the preparation process; the potassium titanate is applied to the preparation of the welding electrode, the arc voltage of the welding electrode is stable, the dust content is low, the sulfur content and the phosphorus content are both less than 0.015 percent, and the overall performance is excellent.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with examples are described in detail below.
Example 1
A preparation method of potassium titanate comprises the following steps:
(1) weighing potassium oxide, titanium dioxide and KCl-KF, and uniformly mixing; then adding the polypropylene solution into the mixture, and uniformly stirring; the molar ratio of the potassium oxide to the titanium dioxide is 1:2, and the dosage of KCl-KF is 3 percent of the mass of the main material; the mass ratio of the polypropylene solution to the mixture is 3: 1;
(2) wet grinding the uniformly stirred slurry for the first time, and drying after the wet grinding is finished; the first wet grinding adopts a mode of mixing big balls and small balls, the diameter of the big balls is 50mm, the diameter of the small balls is 20mm, the ball-milling rotating speed is 500rpm, the ball-milling time is 4 hours, and the ball-material ratio is 5: 1;
(3) adding a polypropylene solution into the material dried in the step (2), uniformly stirring and mixing, and then carrying out second wet grinding; the mass ratio of the polypropylene solution to the dried material is 2: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 300rpm, the ball milling time is 2 hours, and the ball-to-material ratio is 10: 1;
(4) drying to constant weight after second wet grinding is finished, and then sintering for 5 hours at the temperature of 1150 ℃;
(5) dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain the potassium hexatitanate.
Example 2
A preparation method of potassium titanate comprises the following steps:
(1) weighing potassium oxide, titanium dioxide and KCl-KF, and uniformly mixing; then adding the polypropylene solution into the mixture, and uniformly stirring; the molar ratio of the potassium oxide to the titanium dioxide is 1:4, and the dosage of KCl-KF is 5 percent of the mass of the main material; the mass ratio of the polypropylene solution to the mixture is 5: 1;
(2) wet grinding the uniformly stirred slurry for the first time, and drying after the wet grinding is finished; the first wet grinding adopts a mode of mixing big balls and small balls, the diameter of the big balls is 50mm, the diameter of the small balls is 20mm, the ball-milling rotating speed is 800rpm, the ball-milling time is 4h, and the ball-material ratio is 8: 1;
(3) adding a polypropylene solution into the material dried in the step (2), uniformly stirring and mixing, and then carrying out second wet grinding; the mass ratio of the polypropylene solution to the dried material is 4: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 200rpm, the ball milling time is 2 hours, and the ball-to-material ratio is 16: 1;
(4) drying to constant weight after second wet grinding is finished, and then sintering for 5 hours at the temperature of 1000 ℃;
(5) dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain the potassium hexatitanate.
Example 3
A preparation method of potassium titanate comprises the following steps:
(1) weighing potassium oxide, titanium dioxide and KCl-KF, and uniformly mixing; then adding the polypropylene solution into the mixture, and uniformly stirring; the molar ratio of the potassium oxide to the titanium dioxide is 1:5, and the dosage of KCl-KF is 8 percent of the mass of the main material; the mass ratio of the polypropylene solution to the mixture is 8: 1;
(2) wet grinding the uniformly stirred slurry for the first time, and drying after the wet grinding is finished; the first wet grinding adopts a mode of mixing big balls and small balls, the diameter of the big balls is 50mm, the diameter of the small balls is 20mm, the ball-milling rotating speed is 600rpm, the ball-milling time is 4h, and the ball-material ratio is 10: 1;
(3) adding a polypropylene solution into the material dried in the step (2), uniformly stirring and mixing, and then carrying out second wet grinding; the mass ratio of the polypropylene solution to the dried material is 5: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 300rpm, the ball milling time is 2 hours, and the ball-to-material ratio is 20: 1;
(4) drying to constant weight after second wet grinding is finished, and then sintering for 5 hours at the temperature of 1000 ℃;
(5) dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain the potassium hexatitanate.
Example 4
Applying the potassium titanate prepared in the embodiment 1-3 as an additive to the preparation of the welding electrode, and inspecting the material performance of the welding electrode; the welding rod coating consists of the following components in parts by weight: 18 parts of marble, 1 part of dolomite, 0.5 part of cryolite, 35 parts of feldspar powder, 8 parts of titanium dioxide, 12 parts of potassium titanate, 6 parts of composite mica, 6 parts of electrolytic manganese and 15 parts of metal chromium. The properties of the solder bar material are shown in table 1. As can be seen from Table 1, the potassium titanate prepared by the method is used as an additive in the preparation of the electric welding rod, and the obtained electric welding rod has excellent performance.
TABLE 1 electrode Performance results
Claims (10)
1. The preparation method of potassium titanate is characterized in that potassium oxide and titanium dioxide are used as raw materials, KCl-KF is used as a cosolvent, the raw materials are uniformly mixed and then added into a polypropylene solution, wet grinding is carried out, sintering is carried out, and post-treatment is carried out to obtain the potassium titanate.
2. The method for producing potassium titanate according to claim 1, wherein the wet-milling treatment is divided into two steps, and the wet-milling treatment is performed again after the first wet-milling is completed and then the drying is performed, and the polypropylene solution is added again.
3. The preparation method of potassium titanate according to claim 2, wherein the first wet milling process adopts mechanical ball milling, and adopts a mode of mixing large balls and small balls, wherein the diameter of the large balls is 50mm, the diameter of the small balls is 20mm, the ball milling speed is 500-800 rpm, the ball milling time is 3-5 h, and the ball-to-material ratio is 5: 1-10: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 100-300 rpm, the ball milling time is 1-3 h, and the ball-to-material ratio is 10: 1-20: 1.
4. The method for preparing potassium titanate according to claim 2, wherein the mass ratio of the polypropylene solution to the dry material in the first wet grinding is 3:1 to 10: 1; and during the second wet grinding, the mass ratio of the polypropylene solution to the dry material is 1: 1-5: 1.
5. The method for producing potassium titanate according to claim 1, wherein the molar ratio of the potassium oxide to the titanium dioxide is 1:2 to 1: 5; the dosage of the cosolvent accounts for 1-10% of the mass of the main material.
6. The method for producing potassium titanate according to claim 1, wherein the sintering temperature is 800 to 1250 ℃ and the sintering time is 3 to 8 hours.
7. The method for producing potassium titanate according to claim 1, wherein the post-treatment: dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain potassium hexatitanate.
8. The method for producing potassium titanate according to claim 1, characterized by comprising the steps of:
(1) weighing potassium oxide, titanium dioxide and KCl-KF, and uniformly mixing; then adding the polypropylene solution into the mixture, and uniformly stirring; the molar ratio of the potassium oxide to the titanium dioxide is 1: 2-1: 5, and the dosage of KCl-KF is 1-10% of the mass of the main material; the mass ratio of the polypropylene solution to the mixture is 3: 1-10: 1;
(2) wet grinding the uniformly stirred slurry for the first time, and drying after the wet grinding is finished; the first wet grinding adopts a mode of mixing big balls and small balls, the diameter of the big balls is 50mm, the diameter of the small balls is 20mm, the ball-milling rotating speed is 500-800 rpm, the ball-milling time is 3-5 h, and the ball-material ratio is 5: 1-10: 1;
(3) adding a polypropylene solution into the material dried in the step (2), uniformly stirring and mixing, and then carrying out second wet grinding; the mass ratio of the polypropylene solution to the dried material is 1: 1-5: 1; the second wet grinding process adopts mechanical ball milling, a mode of mixing big balls and small balls is adopted, the diameter of the big balls is 30mm, the diameter of the small balls is 10mm, the ball milling speed is 100-300 rpm, the ball milling time is 1-3 h, and the ball-to-material ratio is 10: 1-20: 1;
(4) drying to constant weight after second wet grinding is finished, and then sintering for 3-8 h at the temperature of 800-1250 ℃;
(5) dispersing the sintered product in cold water, stirring in hot water at 60 ℃ for 2h, adding dilute sulfuric acid to neutralize potassium ions, staying at 1000 ℃ for 3h, stirring in hot water at 60 ℃ for 1h, and drying at 350 ℃ to obtain the potassium hexatitanate.
9. The potassium hexatitanate prepared by the method according to any one of claims 1 to 8.
10. Use of the potassium hexatitanate of claim 9 in electric welding electrodes.
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