CN107385314A - Mine mill ball - Google Patents

Mine mill ball Download PDF

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Publication number
CN107385314A
CN107385314A CN201710476494.4A CN201710476494A CN107385314A CN 107385314 A CN107385314 A CN 107385314A CN 201710476494 A CN201710476494 A CN 201710476494A CN 107385314 A CN107385314 A CN 107385314A
Authority
CN
China
Prior art keywords
ball
hours
mill ball
mine
iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710476494.4A
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Chinese (zh)
Inventor
蓝媚
韦春枝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hechi Sen Sen Machinery Co Ltd
Original Assignee
Hechi Sen Sen Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hechi Sen Sen Machinery Co Ltd filed Critical Hechi Sen Sen Machinery Co Ltd
Priority to CN201710476494.4A priority Critical patent/CN107385314A/en
Publication of CN107385314A publication Critical patent/CN107385314A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/20—Disintegrating members
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a kind of mine mill ball, is related to mill ball manufacturing technology field, includes the chemical composition of following mass ratio：C：2.1%~2.82%, Si：0.35%~0.75%, Mn：0.5%~0.95%, Cr：8.54%~10.7%, Sc：0.05%~0.85%, Ce：0.08%~0.29%, Cu：0.15%~0.32%, V：0.2%~0.6%, Nb：0.18%~0.3%, B：0.03%~0.09%, P：0.01%~0.03%, S：0.01%~0.07%, surplus Fe.Than prior art, it is relatively low that the present invention can solve existing mine mill ball impact flexibility, the problem of easily causing fragmentation in use.

Description

Mine mill ball
Technical field
The present invention relates to mill ball manufacturing technology field, especially a kind of mill ball for benficiation machinery equipment.
Background technology
Grinding ball specialized for mine is mainly used in ore dressing, the grinding of pellet, and impulsive force is big when it does work in grinding machine, corrosion Property is strong.Currently used is evanohm cast grinding ball, although the high wearability of evanohm content increases, corrosion resistance Can be poor, impact flexibility is relatively low, and continuous grinding ball often easily causes fragmentation in use, and service life is low.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of mine mill ball, to solve existing mine mill ball Impact flexibility is relatively low, easily causes the problem of fragmentation in use.
The technical proposal for solving the technical problem of the invention is：A kind of mine includes following mass ratio with mill ball Chemical composition：C：2.1%~2.82%, Si：0.35%~0.75%, Mn：0.5%~0.95%, Cr：8.54%~ 10.7%, Sc：0.05%~0.85%, Ce：0.08%~0.29%, Cu：0.15%~0.32%, V：0.2%~0.6%, Nb：0.18%~0.3%, B：0.03%~0.09%, P：0.01%~0.03%, S：0.01%~0.07%, surplus Fe.
Above-mentioned mine is with mill ball technical scheme, and more specifically technical scheme can also be：The mine mill ball Preparation method this comprise the following steps：
(1) above-mentioned raw materials are subjected to dispensing by proportioning and obtain abrading-ball batch mixing；
(2) the abrading-ball batch mixing prepared is inserted into melting in smelting furnace and obtains molten iron, spent for 1500 DEG C~1550 DEG C；
(3) by molten iron thread casting is carried out at 1340 DEG C~1390 DEG C of temperature；
(4) molded after cooling down 4 hours~5 hours, take out Cast-iron Ball；
(5) Cast-iron Ball after cooling is ground；
(6) Cast-iron Ball after grinding is put into heating furnace, is warming up to 550 DEG C~650 DEG C, be incubated 3 hours~4 hours；
(7) quenched in oil sump, temperature is air-cooled to room temperature after being 870 DEG C~950 DEG C, 45 minutes, then puts into tempering furnace；
(8) it is tempered 4 hours~6 hours, temperature is 175 DEG C~195 DEG C, is got product after being cooled to room temperature.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：1st, by rare earth Elements C e is added in cast iron, because Ce can be melted in process of setting by solute redistribution to be enriched in primary austenite forward position In body, refine primary austenite；Simultaneously Ce growth eutectic carbide on activate absorption, promote eutectic degree of supercooling increase and altogether Crystal solidification scope increases, and so as to significantly improve cast iron eutectic structure, its mechanical performance is reached more than HRC60, impact flexibility reaches To 3.9J/cm2More than, obtained mill ball has good impact resistance, does not make fragmentation, service life in use It is long；The 2nd, Nb, B are added to the hardness and wearability that abrading-ball is improved in cast iron, appropriate B and Cu can improve the through hardening of matrix Property, Cu, Nb are advantageous to crystal grain thinning, improve matrix strength, impact flexibility and corrosion resistance.To solve existing mine mill ball Impact flexibility is relatively low, easily causes the problem of fragmentation in use.
Embodiment
Below in conjunction with example, the invention will be further described：
Embodiment 1：
A kind of mine includes the chemical composition of following mass ratio with mill ball：C：2.1%, Si：0.35%, Mn：0.5%, Cr： 8.54%, Sc：0.05%, Ce：0.08%, Cu：0.15%, V：0.2%, Nb：0.18%, B：0.03%, P：0.01%, S： 0.01%, surplus Fe；
The preparation method of the mine mill ball this comprise the following steps：
(1) above-mentioned raw materials are subjected to dispensing by proportioning and obtain abrading-ball batch mixing；
(2) the abrading-ball batch mixing prepared is inserted into melting in smelting furnace and obtains molten iron, spent for 1500 DEG C~1550 DEG C；
(3) by molten iron thread casting is carried out at 1340 DEG C~1390 DEG C of temperature；
(4) molded after cooling down 4 hours, take out Cast-iron Ball；
(5) Cast-iron Ball after cooling is ground；
(6) Cast-iron Ball after grinding is put into heating furnace, is warming up to 550 DEG C~650 DEG C, be incubated 3 hours；
(7) quenched in oil sump, temperature is air-cooled to room temperature after being 870 DEG C~950 DEG C, 45 minutes, then puts into tempering furnace；
(8) it is tempered 4 hours, temperature is 175 DEG C~195 DEG C, is got product after being cooled to room temperature.
Embodiment 2：
A kind of mine includes the chemical composition of following mass ratio with mill ball：C：2.82%, Si：0.75%, Mn：0.95%, Cr：10.7%, Sc：0.85%, Ce：0.29%, Cu：0.32%, V：0.6%, Nb：0.3%, B：0.09%, P： 0.03%, S：0.07%, surplus Fe；
The preparation method of the mine mill ball this comprise the following steps：
(1) above-mentioned raw materials are subjected to dispensing by proportioning and obtain abrading-ball batch mixing；
(2) the abrading-ball batch mixing prepared is inserted into melting in smelting furnace and obtains molten iron, spent for 1500 DEG C~1550 DEG C；
(3) by molten iron thread casting is carried out at 1340 DEG C~1390 DEG C of temperature；
(4) molded after cooling down 5 hours, take out Cast-iron Ball；
(5) Cast-iron Ball after cooling is ground；
(6) Cast-iron Ball after grinding is put into heating furnace, is warming up to 550 DEG C~650 DEG C, be incubated 4 hours；
(7) quenched in oil sump, temperature is air-cooled to room temperature after being 870 DEG C~950 DEG C, 45 minutes, then puts into tempering furnace；
(8) it is tempered 6 hours, temperature is 175 DEG C~195 DEG C, is got product after being cooled to room temperature.

Claims (2)

1. a kind of mine mill ball, it is characterised in that include the chemical composition of following mass ratio：C：2.1%~2.82%, Si： 0.35%~0.75%, Mn：0.5%~0.95%, Cr：8.54%~10.7%, Sc：0.05%~0.85%, Ce：0.08% ~0.29%, Cu：0.15%~0.32%, V：0.2%~0.6%, Nb：0.18%~0.3%, B：0.03%~0.09%, P：0.01%~0.03%, S：0.01%~0.07%, surplus Fe.
2. the mine according to claim 1 preparation method of mill ball ball, it is characterised in that the mine mill ball Preparation method this comprise the following steps：
(1) above-mentioned raw materials are subjected to dispensing by proportioning and obtain abrading-ball batch mixing；
(2) the abrading-ball batch mixing prepared is inserted into melting in smelting furnace and obtains molten iron, spent for 1500 DEG C~1550 DEG C；
(3) by molten iron thread casting is carried out at 1340 DEG C~1390 DEG C of temperature；
(4) molded after cooling down 4 hours~5 hours, take out Cast-iron Ball；
(5) Cast-iron Ball after cooling is ground；
(6) Cast-iron Ball after grinding is put into heating furnace, is warming up to 550 DEG C~650 DEG C, be incubated 3 hours~4 hours；
(7) quenched in oil sump, temperature is air-cooled to room temperature after being 870 DEG C~950 DEG C, 45 minutes, then puts into tempering furnace；
(8) it is tempered 4 hours~6 hours, temperature is 175 DEG C~195 DEG C, is got product after being cooled to room temperature.
CN201710476494.4A 2017-06-21 2017-06-21 Mine mill ball Pending CN107385314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710476494.4A CN107385314A (en) 2017-06-21 2017-06-21 Mine mill ball

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710476494.4A CN107385314A (en) 2017-06-21 2017-06-21 Mine mill ball

Publications (1)

Publication Number Publication Date
CN107385314A true CN107385314A (en) 2017-11-24

Family

ID=60333593

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710476494.4A Pending CN107385314A (en) 2017-06-21 2017-06-21 Mine mill ball

Country Status (1)

Country Link
CN (1) CN107385314A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102154594A (en) * 2011-03-21 2011-08-17 安徽省凤形耐磨材料股份有限公司 Chromium-niobium-boron alloy rare earth casting grinding ball and production process method thereof
CN103014550A (en) * 2012-12-10 2013-04-03 马鞍山市恒达耐磨材料有限责任公司 High chromium multielement alloy wear resisting ball and manufacturing method thereof
CN104087813A (en) * 2014-06-19 2014-10-08 宁国市正兴耐磨材料有限公司 Mine special-type dedicated grinding ball
CN105316566A (en) * 2015-10-28 2016-02-10 安徽省三方新材料科技有限公司 Abrasion-resistant ball special for mines and manufacturing method for abrasion-resistant ball
CN105401054A (en) * 2015-10-28 2016-03-16 安徽省三方新材料科技有限公司 Alloyed cast iron grinding ball special for mine
CN106319336A (en) * 2016-08-23 2017-01-11 宁国市开源电力耐磨材料有限公司 Low-carbon high-chromium abrasion-resistant ball and preparation technique thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102154594A (en) * 2011-03-21 2011-08-17 安徽省凤形耐磨材料股份有限公司 Chromium-niobium-boron alloy rare earth casting grinding ball and production process method thereof
CN103014550A (en) * 2012-12-10 2013-04-03 马鞍山市恒达耐磨材料有限责任公司 High chromium multielement alloy wear resisting ball and manufacturing method thereof
CN104087813A (en) * 2014-06-19 2014-10-08 宁国市正兴耐磨材料有限公司 Mine special-type dedicated grinding ball
CN105316566A (en) * 2015-10-28 2016-02-10 安徽省三方新材料科技有限公司 Abrasion-resistant ball special for mines and manufacturing method for abrasion-resistant ball
CN105401054A (en) * 2015-10-28 2016-03-16 安徽省三方新材料科技有限公司 Alloyed cast iron grinding ball special for mine
CN106319336A (en) * 2016-08-23 2017-01-11 宁国市开源电力耐磨材料有限公司 Low-carbon high-chromium abrasion-resistant ball and preparation technique thereof

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Application publication date: 20171124