CN113943885A - Processing technology of high-wear-resistance high-chromium alloy cast iron grinding ball special for mine - Google Patents
Processing technology of high-wear-resistance high-chromium alloy cast iron grinding ball special for mine Download PDFInfo
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- CN113943885A CN113943885A CN202111219449.3A CN202111219449A CN113943885A CN 113943885 A CN113943885 A CN 113943885A CN 202111219449 A CN202111219449 A CN 202111219449A CN 113943885 A CN113943885 A CN 113943885A
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- grinding ball
- iron grinding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a processing technology of a high-wear-resistance high-chromium alloy cast iron grinding ball special for mines, which comprises the steps of preparing raw materials, firstly collecting some pig iron, scrap steel and ferromolybdenum, then cleaning the pig iron, the scrap steel and the ferromolybdenum, detecting, picking out other elements contained in the raw materials, placing the elements in a unqualified frame, secondly preparing the rest carbon, chromium, manganese, sulfur and phosphorus, obtaining prepared raw materials after the preparation is finished, and then smelting, casting and demolding, heat treatment, tempering treatment, grinding and cleaning; according to the processing technology of the high-wear-resistance high-chromium alloy cast iron grinding ball special for the mine, the secondary recycling is carried out after partial raw materials are cleaned, the consumption of raw materials is effectively saved, and meanwhile, the iron grinding ball is subjected to heat treatment, hot rolling and tempering treatment, so that the yield strength, tensile strength, elongation and impact energy of the prepared iron grinding ball are greatly improved, and the production efficiency of the iron grinding ball can be improved when ore is crushed.
Description
Technical Field
The invention relates to the technical field of processing of iron grinding balls, in particular to a processing technology of a high-wear-resistance high-chromium alloy cast iron grinding ball special for mines.
Background
The iron grinding balls are mainly used for ball mills as media for grinding materials. The method is widely applied to industries such as ore dressing plants, cement and the like;
when the high-wear-resistance high-chromium alloy cast iron grinding ball is used in a mine at present, the iron grinding ball is firstly needed to be used for processing during ore processing, but the traditional high-wear-resistance high-chromium alloy cast iron grinding ball is low in production efficiency and inconvenient to use due to low yield strength, tensile strength and impact energy, so that the processing technology of the high-wear-resistance high-chromium alloy cast iron grinding ball special for the mine is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a processing technology of a high-wear-resistance high-chromium alloy cast iron grinding ball special for mines, which has the characteristic of reducing the working strength and has the effect of high production efficiency.
The invention provides the following technical scheme: a processing technology of a high-wear-resistance high-chromium alloy cast iron grinding ball special for mines comprises the following steps:
firstly, collecting preparation raw materials, namely firstly collecting some pure pig iron, scrap steel and ferromolybdenum, then cleaning the raw materials, detecting the cleaned raw materials, picking out other elements contained in the raw materials, placing the elements in a rejection frame, secondly preparing the rest carbon, chromium, manganese, sulfur and phosphorus, and obtaining the prepared raw materials after the preparation is finished;
step two, smelting, namely putting the required prepared raw material obtained in the step one into a crucible of a vacuum furnace, putting the crucible at the bottom of the crucible, smelting all other remaining elements to be molten, wherein the temperature in the crucible is 1200-1800 ℃ until all components are dissolved into liquid state, and obtaining molten metal;
step three, casting and demolding, namely casting the molten metal obtained in the step two into an iron grinding ball mold, demolding after casting is finished, cooling the mold until the mold is in a normal temperature state, and separating the iron grinding ball in the mold to obtain a crude product of the iron grinding ball;
step four, heat treatment, heating the crude product of the iron grinding ball, firstly carrying out crude rolling at the beginning temperature of 1000-;
step five, tempering treatment, namely placing the obtained iron grinding ball after heat treatment in a tempering furnace for heating and tempering, wherein the tempering temperature is 400-450 ℃, the heat preservation time is 5-8h, then placing the iron grinding ball for standing to slowly cool the iron grinding ball, and taking the iron grinding ball out after the temperature is reduced to 180 ℃ and standing the iron grinding ball at the normal temperature state to obtain the iron grinding ball after tempering treatment;
and step six, polishing and cleaning, polishing the tempered iron grinding ball according to specifications, firstly polishing barbs and burrs on the surface of the iron grinding ball to be flat by using abrasive paper, then finely polishing the surface of the iron grinding ball to be smooth, finally washing the finely polished iron grinding ball by using a high-pressure water gun, finishing the processing technology of the iron grinding ball, and finally obtaining the high-wear-resistance high-chromium alloy cast iron grinding ball special for the mine.
Preferably, in the step one, the raw materials comprise the following components in parts by mass: 15-35 parts of carbon, 5-10 parts of pig iron, 10-25 parts of scrap steel, 2-8 parts of ferromolybdenum, 3-10 parts of sulfur, 0.5-2 parts of manganese, 1-5 parts of chromium and 5-8 parts of phosphorus.
Preferably, in the second step, 0.5-1% by weight of carburant is added into the crucible after the crucible is burnt for 30-45min, and then the temperature of the converter is adjusted to about 2000 ℃ for smelting.
Preferably, when the cooling in the fifth step is carried out, the cooling speed is more than or equal to 10 ℃/s, and the final cooling temperature is less than or equal to 100 ℃.
Preferably, in the step six, the barbs on the surface of the iron grinding ball are flatly ground by using 200-mesh or 400-mesh sand paper, and then the iron grinding ball is fully ground once by using 600-mesh sand paper.
Compared with the prior art, the invention has the following beneficial effects: this processing technology of special high wear-resisting high chromium alloy cast iron grinding ball in mine carries out secondary cyclic utilization after through adopting partial raw materials sanitization, the effectual consumption of having practiced thrift raw and other materials, carries out thermal treatment, hot rolling and tempering with the iron grinding ball simultaneously for the yield strength, tensile strength, percentage elongation and the impact energy of the iron grinding ball of preparation improve greatly, make the ore that prepares the iron grinding ball can improve its production efficiency when smashing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
During processing, firstly, collecting and preparing raw materials, firstly, collecting some pure pig iron, scrap steel and ferromolybdenum, then cleaning and detecting the raw materials, picking out other elements contained in the raw materials and placing the elements in a rejection frame, and secondly, preparing the rest carbon, chromium, manganese, sulfur and phosphorus, wherein the raw materials comprise, by mass, 35 parts of carbon, 10 parts of pig iron, 25 parts of scrap steel, 8 parts of iron, 10 parts of sulfur, 2 parts of manganese, 5 parts of chromium and 5 parts of phosphorus. After the preparation is finished, obtaining a prepared raw material; secondly, smelting, namely putting the required prepared raw material obtained in the step one into a crucible of a vacuum furnace, putting the crucible at the bottom of the crucible, smelting all other remaining elements to be molten, wherein the temperature in the crucible is 1500 ℃ until all components are dissolved into a liquid state, and obtaining molten metal; casting and demolding, namely casting the molten metal obtained in the step two into an iron grinding ball mold, demolding after casting is finished, cooling the mold until the mold is in a normal temperature state, and separating the iron grinding ball in the mold to obtain a crude product of the iron grinding ball; then, carrying out heat treatment, namely heating the rough finished product of the iron grinding ball, firstly carrying out rough rolling at the beginning rolling temperature of 1200 ℃, then carrying out finish rolling at the inlet temperature of 1100 ℃ and the finishing rolling temperature of 900 ℃, and then standing for 35in to obtain the heat-treated iron grinding ball; then tempering treatment is carried out, the obtained iron grinding ball after heat treatment is placed in a tempering furnace for heating and tempering, the tempering temperature is 450 ℃, the heat preservation time is 5 hours, then the iron grinding ball is placed in a standing state to be slowly cooled, the temperature is reduced to 180 ℃, the iron grinding ball is taken out and is placed in a standing state at normal temperature, and the iron grinding ball after tempering treatment is obtained; and finally, polishing and cleaning, polishing the iron grinding ball subjected to tempering treatment according to specifications, polishing the barb and the burr on the surface of the iron grinding ball to be flat by using abrasive paper, finely polishing the iron grinding ball, polishing the surface of the iron grinding ball to be smooth, polishing the barb on the surface of the iron grinding ball by using 200-mesh abrasive paper during coarse polishing, comprehensively polishing the iron grinding ball once by using 600-mesh abrasive paper, washing the iron grinding ball subjected to fine polishing by using a high-pressure water gun, and finishing the processing technology of the iron grinding ball.
A proper amount of sample of the iron grinding ball prepared above is taken for mechanical property test, and the test shows that the surface hardness is 61.1hrc, the impact toughness is 6.5J/cm2, and the wear resistance is 5.25 h/g.
Example 2
A proper amount of sample of the conventionally prepared iron grinding ball is taken for mechanical property test, the surface hardness is tested to be 58.25hrc, the impact toughness is tested to be 6.12J/cm2, and the wear resistance is tested to be 5.05 h/g.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A processing technology of a high wear-resistant high-chromium alloy cast iron grinding ball special for mines comprises the following steps:
firstly, collecting preparation raw materials, namely firstly collecting some pure pig iron, scrap steel and ferromolybdenum, then cleaning the raw materials, detecting the cleaned raw materials, picking out other elements contained in the raw materials, placing the elements in a rejection frame, secondly preparing the rest carbon, chromium, manganese, sulfur and phosphorus, and obtaining the prepared raw materials after the preparation is finished;
step two, smelting, namely putting the required prepared raw material obtained in the step one into a crucible of a vacuum furnace, putting the crucible at the bottom of the crucible, smelting all other remaining elements to be molten, wherein the temperature in the crucible is 1200-1800 ℃ until all components are dissolved into liquid state, and obtaining molten metal;
step three, casting and demolding, namely casting the molten metal obtained in the step two into an iron grinding ball mold, demolding after casting is finished, cooling the mold until the mold is in a normal temperature state, and separating the iron grinding ball in the mold to obtain a crude product of the iron grinding ball;
step four, heat treatment, heating the crude product of the iron grinding ball, firstly carrying out crude rolling at the beginning temperature of 1000-;
step five, tempering treatment, namely placing the obtained iron grinding ball after heat treatment in a tempering furnace for heating and tempering, wherein the tempering temperature is 400-450 ℃, the heat preservation time is 5-8h, then placing the iron grinding ball for standing to slowly cool the iron grinding ball, and taking the iron grinding ball out after the temperature is reduced to 180 ℃ and standing the iron grinding ball at the normal temperature state to obtain the iron grinding ball after tempering treatment;
and step six, polishing and cleaning, polishing the tempered iron grinding ball according to specifications, firstly polishing barbs and burrs on the surface of the iron grinding ball to be flat by using abrasive paper, then finely polishing the surface of the iron grinding ball to be smooth, finally washing the finely polished iron grinding ball by using a high-pressure water gun, finishing the processing technology of the iron grinding ball, and finally obtaining the high-wear-resistance high-chromium alloy cast iron grinding ball special for the mine.
2. The processing technology of the high wear-resistant high-chromium alloy cast iron grinding ball special for mines according to claim 1, characterized in that: in the first step, the raw materials comprise the following components in parts by mass: 15-35 parts of carbon, 5-10 parts of pig iron, 10-25 parts of scrap steel, 2-8 parts of ferromolybdenum, 3-10 parts of sulfur, 0.5-2 parts of manganese, 1-5 parts of chromium and 5-8 parts of phosphorus.
3. The processing technology of the high wear-resistant high-chromium alloy cast iron grinding ball special for mines according to claim 1, characterized in that: in the second step, the crucible is burnt for 30-45min, then 0.5-1% of carburant is added, and then the temperature of the converter is adjusted to about 2000 ℃ for smelting.
4. The processing technology of the high wear-resistant high-chromium alloy cast iron grinding ball special for mines according to claim 1, characterized in that: and fifthly, during cooling, the cooling speed is more than or equal to 10 ℃/s, and the final cooling temperature is less than or equal to 100 ℃.
5. The processing technology of the high wear-resistant high-chromium alloy cast iron grinding ball special for mines according to claim 1, characterized in that: and in the step six, the barbs on the surface of the iron grinding ball are flatly ground by using 200-mesh or 400-mesh sand paper during coarse grinding, and then the iron grinding ball is comprehensively ground once by using 600-mesh sand paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111219449.3A CN113943885A (en) | 2021-10-20 | 2021-10-20 | Processing technology of high-wear-resistance high-chromium alloy cast iron grinding ball special for mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111219449.3A CN113943885A (en) | 2021-10-20 | 2021-10-20 | Processing technology of high-wear-resistance high-chromium alloy cast iron grinding ball special for mine |
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| Publication Number | Publication Date |
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| CN113943885A true CN113943885A (en) | 2022-01-18 |
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| CN202111219449.3A Withdrawn CN113943885A (en) | 2021-10-20 | 2021-10-20 | Processing technology of high-wear-resistance high-chromium alloy cast iron grinding ball special for mine |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95109076A (en) * | 1995-05-31 | 1997-02-20 | Акционерное общество "Кронтиф" | Method of fabricating cast iron grinding balls |
| US5831188A (en) * | 1992-05-05 | 1998-11-03 | Teledyne Industries, Inc. | Composite shots and methods of making |
| CN101962734A (en) * | 2010-09-28 | 2011-02-02 | 莱芜钢铁股份有限公司 | Steel for ball mill steel ball and preparation method thereof |
| CN102703796A (en) * | 2012-06-20 | 2012-10-03 | 石家庄市诚达耐磨材料有限公司 | High abrasion resistance high-chromium alloy cast iron grinding ball dedicated for mine and processing technology thereof |
| CN102839316A (en) * | 2012-09-28 | 2012-12-26 | 石家庄市诚达耐磨材料有限公司 | Ultrahigh chromium grinding ball and processing process thereof |
| CN104651730A (en) * | 2015-02-12 | 2015-05-27 | 清原满族自治县三方耐磨材料有限公司 | Wear-resistant alloy steel, alloy grinding ball and preparation method of wear-resistant alloy steel |
| CN106435363A (en) * | 2016-10-28 | 2017-02-22 | 河北天理环保科技有限公司 | Rolled high-wearable steel ball and production method thereof |
| CN107739986A (en) * | 2017-11-25 | 2018-02-27 | 铜陵市明诚铸造有限责任公司 | Special major diameter forging abrasion-proof steel ball in a kind of mine and preparation method thereof |
-
2021
- 2021-10-20 CN CN202111219449.3A patent/CN113943885A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5831188A (en) * | 1992-05-05 | 1998-11-03 | Teledyne Industries, Inc. | Composite shots and methods of making |
| RU95109076A (en) * | 1995-05-31 | 1997-02-20 | Акционерное общество "Кронтиф" | Method of fabricating cast iron grinding balls |
| CN101962734A (en) * | 2010-09-28 | 2011-02-02 | 莱芜钢铁股份有限公司 | Steel for ball mill steel ball and preparation method thereof |
| CN102703796A (en) * | 2012-06-20 | 2012-10-03 | 石家庄市诚达耐磨材料有限公司 | High abrasion resistance high-chromium alloy cast iron grinding ball dedicated for mine and processing technology thereof |
| CN102839316A (en) * | 2012-09-28 | 2012-12-26 | 石家庄市诚达耐磨材料有限公司 | Ultrahigh chromium grinding ball and processing process thereof |
| CN104651730A (en) * | 2015-02-12 | 2015-05-27 | 清原满族自治县三方耐磨材料有限公司 | Wear-resistant alloy steel, alloy grinding ball and preparation method of wear-resistant alloy steel |
| CN106435363A (en) * | 2016-10-28 | 2017-02-22 | 河北天理环保科技有限公司 | Rolled high-wearable steel ball and production method thereof |
| CN107739986A (en) * | 2017-11-25 | 2018-02-27 | 铜陵市明诚铸造有限责任公司 | Special major diameter forging abrasion-proof steel ball in a kind of mine and preparation method thereof |
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Application publication date: 20220118 |
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