CN104099524A - Liner plate of ball mill for crushing large material - Google Patents
Liner plate of ball mill for crushing large material Download PDFInfo
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- CN104099524A CN104099524A CN201410376951.9A CN201410376951A CN104099524A CN 104099524 A CN104099524 A CN 104099524A CN 201410376951 A CN201410376951 A CN 201410376951A CN 104099524 A CN104099524 A CN 104099524A
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Abstract
The invention discloses a liner plate of a ball mill for crushing a large material. The liner plate comprises the following components in percentage by weight: 1.5 to 2% of C, 0.25 to 0.33% of Si, 0.2 to 0.3% of Mn, 1.5 to 2.3% of Mo, 32 to 35% of Cr, 0.15 to 0.3% of Re, not greater than 0.015% of P, not greater than 0.028% of S, and the balance of Fe and other inevitable impurities; the liner plate of the ball mill for crushing the large material is prepared by treating raw materials, namely, steel scrap, ferrochromium and ferromolybdenum by smelting, casting, austenitizing, tempering, secondary casting, heating, preserving heat, and quenching. The liner plate of the ball mill for crushing the large material is large in hardness, high in toughness, high in resistance to crack expansion, high in milling efficiency and small in cost.
Description
Technical field
The present invention relates to abrasion-proof backing block technical field, relate in particular to a kind of oversize material fragmentation ball grinding machine lining board.
Background technology
Current domestic ball mill target mostly is cement, coal, ore, cinder etc., and liner plate hardness, wear resistance and toughness reguirements when lining sheet for ball mill is used are more and more higher.Because crusher when work, under intense impact effect, oversize material requires to have the ability of enough toughness and higher opposing crack propagation to liner plate plate body material, and the position that plate body contacts with material also participates in wearing and tearing, and plate body also will have certain wear resistance.
Summary of the invention
The present invention proposes a kind of oversize material fragmentation ball grinding machine lining board, hardness is large, good toughness, and opposing crack propagation is stronger, and mill efficiency is high, and cost is low.
A kind of oversize material fragmentation ball grinding machine lining board that the present invention proposes, described liner plate comprises by weight percentage: C:1.5-2%, Si:0.25-0.33%, Mn:0.2-0.3%, Mo:1.5-2.3%, Cr:32-35%, Re:0.15-0.3%, P≤0.015%, S≤0.028%, surplus is Fe and other inevitable impurity;
In preparation process, according to following processing step, prepare described oversize material fragmentation ball grinding machine lining board:
S1, first steel scrap is melted in medium-frequency induction furnace, after being warming up to 1520-1580 ℃, add successively again metal ferrochrome, ferromanganese, molybdenum-iron to form melting charge, the pig iron is fused into molten iron and molten iron punching is melted and in melting charge, obtained mould material, be incubated after 5-20 minute and with pouring device, mould material be poured in the first mould and the second mould, cooling forming obtains a plurality of raised member and premolding liner plate plate body, and the major part of raised member can coordinate clamping with premolding liner plate plate body;
S2, the premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 300-350 ℃ by normal temperature, heating-up time 2-3 hour, soaking time is 1-2h; Subordinate phase is warming up to 500-550 ℃, heating-up time 1-2 hour, and soaking time is 0.5-1h; Phase III is warming up to 620-650 ℃, heating-up time 1-2 hour, and soaking time is 1-1.5h; Fourth stage is heated to 860～980 ℃, heating-up time is 30-40min, soaking time is 1-5 hour: the temperature of then quenching is rapidly that the mass percent concentration of 180～390 ℃ is in 35-45% sodium nitrate solution, and then hold-time 0.3-10 hour takes out and in air, be cooled to room temperature;
S3, again by temper, tempering temperature 300-500 ℃, tempering time 8-12 hour, obtains liner plate plate body and a plurality of protruding block;
S4, protruding block is fixed on board-like skeleton after Shot Blasting, then inserts liner plate plate body, be then preheated to 200-250 ℃, mould assembling, pours into high manganese steel sheet liquid solution, and teeming temperature is 1505-1540 ℃;
S5, the material obtaining is packed in heat treatment furnace, first the speed with 30-45 ℃/h is increased to 450-500 ℃, then the speed with 50-70 ℃/h is warming up to 1300-1550 ℃, after insulation 2-2.5h, send into oil quenching bath and carry out quench treatment, cool time is 20-30 minute, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
Preferably, described liner plate comprises by weight percentage: C:1.8-2%, Si:0.28-0.3%, Mn:0.25-0.28%, Mo:1.8-2.1%, Cr:33-34.5%, Re:0.2-0.25%, P≤0.012%, S≤0.012%, surplus is Fe and other inevitable impurity.
Preferably, in S2, premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace and carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 320 ℃ by normal temperature, 2.5 hours heating-up times, soaking time is 1.5h; Subordinate phase is warming up to 550 ℃, and 1 hour heating-up time, soaking time is 0.5h; Phase III is warming up to 650 ℃, and 1 hour heating-up time, soaking time is 1.5h; Fourth stage is heated to 900 ℃, and the heating-up time is 35min, and soaking time is 3 hours: the temperature of then quenching is rapidly that the mass percent concentration of 350 ℃ is in 38% sodium nitrate solution, 5 hours hold-times, then takes out and in air, is cooled to room temperature.
Preferably, in S5, the material obtaining is packed in heat treatment furnace, first the speed with 32 ℃/h is increased to 480 ℃, then the speed with 65 ℃/h is warming up to 1520 ℃, after insulation 2h, send into oil quenching bath and carry out quench treatment, the cool time is 35 minutes, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
In the present invention, the liner plate by adopting certain mode to prepare with special shape, crush efficiency to oversize material is high, oversize material is pulverized thoroughly, by steel scrap, ferrochrome, molybdenum-iron and the pig iron are as former material, thermal treatment is undertaken by controlling zone heating mode, glassy phase increases, product hardness is large, proportion is high, send in sodium nitrate solution and quench, and rationally control the concentration of SODIUMNITRATE, utilize the high specific heat capacity of sodium nitrate solution to carry out fast cooling, make austenite change into bainite, increase substantially the toughness of product, and adopt certain mode tempering, the good toughness of liner plate, hardness and wear resisting property significantly improve, product strength increases greatly, opposing crack propagation is stronger, frictional dissipation between inner liner of bowl mill plate and abrading-ball is low, in the present invention, product hardness is large, good toughness, opposing crack propagation is stronger, mill efficiency is high, cost is low.
Embodiment
Embodiment 1
An oversize material fragmentation ball grinding machine lining board, described liner plate comprises by weight percentage: C:1.6%, Si:0.3%, Mn:0.2%, Mo:2%, Cr:31.5%, Re:0.28%, P:0.012%, S:0.025%, surplus is Fe and other inevitable impurity;
In preparation process, according to following processing step, prepare described oversize material fragmentation ball grinding machine lining board:
S1, first steel scrap is melted in medium-frequency induction furnace, after being warming up to 1525 ℃, add successively again metal ferrochrome, ferromanganese, molybdenum-iron to form melting charge, the pig iron is fused into molten iron and molten iron punching is melted and in melting charge, obtained mould material, be incubated after 6 minutes and with pouring device, mould material be poured in the first mould and the second mould, cooling forming obtains a plurality of raised member and premolding liner plate plate body, and the major part of raised member can coordinate clamping with premolding liner plate plate body;
S2, the premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 300 ℃ by normal temperature, 3 hours heating-up times, soaking time is 1h; Subordinate phase is warming up to 540 ℃, and 1.5 hours heating-up times, soaking time is 1h; Phase III is warming up to 625 ℃, and 2 hours heating-up times, soaking time is 1h; Fourth stage is heated to 950 ℃, and the heating-up time is 30min, and soaking time is 4 hours: the temperature of then quenching is rapidly that the mass percent concentration of 200 ℃ is in 44% sodium nitrate solution, 2 hours hold-times, then takes out and in air, is cooled to room temperature;
S3, again by temper, 450 ℃ of tempering temperatures, tempering time 9 hours, obtains liner plate plate body and a plurality of protruding block;
S4, protruding block is fixed on board-like skeleton after Shot Blasting, then inserts liner plate plate body, be then preheated to 250 ℃, mould assembling, pours into high manganese steel sheet liquid solution, and teeming temperature is 1510 ℃;
S5, the material obtaining is packed in heat treatment furnace, first the speed with 44 ℃/h is increased to 450 ℃, then the speed with 65 ℃/h is warming up to 1310 ℃, after insulation 2.5h, send into oil quenching bath and carry out quench treatment, cool time is 21 minutes, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
Embodiment 2
An oversize material fragmentation ball grinding machine lining board, described liner plate comprises by weight percentage: C:2%, Si:0.26%, Mn:0.28%, Mo:1.75%, Cr:34.5%, Re:0.17%, P:0.015%, S:0.015%, surplus is Fe and other inevitable impurity;
In preparation process, according to following processing step, prepare described oversize material fragmentation ball grinding machine lining board:
S1, first steel scrap is melted in medium-frequency induction furnace, after being warming up to 1580 ℃, add successively again metal ferrochrome, ferromanganese, molybdenum-iron to form melting charge, the pig iron is fused into molten iron and molten iron punching is melted and in melting charge, obtained mould material, be incubated after 15 minutes and with pouring device, mould material be poured in the first mould and the second mould, cooling forming obtains a plurality of raised member and premolding liner plate plate body, and the major part of raised member can coordinate clamping with premolding liner plate plate body;
S2, the premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 345 ℃ by normal temperature, 2 hours heating-up times, soaking time is 2h; Subordinate phase is warming up to 510 ℃, and 2 hours heating-up times, soaking time is 0.5h; Phase III is warming up to 645 ℃, and 1.2 hours heating-up times, soaking time is 1.5h; Fourth stage is heated to 900 ℃, and the heating-up time is 38min, and soaking time is 2 hours: the temperature of then quenching is rapidly that the mass percent concentration of 380 ℃ is in 36.5% sodium nitrate solution, 9 hours hold-times, then takes out and in air, is cooled to room temperature;
S3, again by temper, 310 ℃ of tempering temperatures, tempering time 12 hours, obtains liner plate plate body and a plurality of protruding block;
S4, protruding block is fixed on board-like skeleton after Shot Blasting, then inserts liner plate plate body, be then preheated to 205 ℃, mould assembling, pours into high manganese steel sheet liquid solution, and teeming temperature is 1535 ℃;
S5, the material obtaining is packed in heat treatment furnace, first the speed with 32 ℃/h is increased to 495 ℃, then the speed with 55 ℃/h is warming up to 1540 ℃, after insulation 2h, send into oil quenching bath and carry out quench treatment, cool time is 39 minutes, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
Embodiment 3
An oversize material fragmentation ball grinding machine lining board, described liner plate comprises by weight percentage: C:1.95%, Si:0.29%, Mn:0.27%, Mo:2%, Cr:34%, Re:0.23%, P:0.008%, S:0.011%, surplus is Fe and other inevitable impurity;
In preparation process, according to following processing step, prepare described oversize material fragmentation ball grinding machine lining board:
S1, first steel scrap is melted in medium-frequency induction furnace, be warming up to after 1550 ℃, add successively again metal ferrochrome, ferromanganese, molybdenum-iron to form melting charge, the pig iron is fused into molten iron and molten iron punching is melted and in melting charge, obtained mould material, be incubated after 10 minutes and with pouring device, mould material be poured in the first mould and the second mould, cooling forming obtains a plurality of raised member and premolding liner plate plate body, and the major part of raised member can coordinate clamping with premolding liner plate plate body;
S2, the premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 320 ℃ by normal temperature, 2.5 hours heating-up times, soaking time is 1.5h; Subordinate phase is warming up to 550 ℃, and 1 hour heating-up time, soaking time is 0.5h; Phase III is warming up to 650 ℃, and 1 hour heating-up time, soaking time is 1.5h; Fourth stage is heated to 900 ℃, and the heating-up time is 35min, and soaking time is 3 hours: the temperature of then quenching is rapidly that the mass percent concentration of 350 ℃ is in 38% sodium nitrate solution, 5 hours hold-times, then takes out and in air, is cooled to room temperature;
S3, again by temper, 420 ℃ of tempering temperatures, tempering time 11 hours, obtains liner plate plate body and a plurality of protruding block;
S4, protruding block is fixed on board-like skeleton after Shot Blasting, then inserts liner plate plate body, be then preheated to 230 ℃, mould assembling, pours into high manganese steel sheet liquid solution, and teeming temperature is 1520 ℃;
S5, the material obtaining is packed in heat treatment furnace, first the speed with 32 ℃/h is increased to 480 ℃, then the speed with 65 ℃/h is warming up to 1520 ℃, after insulation 2h, send into oil quenching bath and carry out quench treatment, cool time is 35 minutes, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. an oversize material fragmentation ball grinding machine lining board, it is characterized in that, described liner plate comprises by weight percentage: C:1.5-2%, Si:0.25-0.33%, Mn:0.2-0.3%, Mo:1.5-2.3%, Cr:32-35%, Re:0.15-0.3%, P≤0.015%, S≤0.028%, surplus is Fe and other inevitable impurity;
In preparation process, according to following processing step, prepare described oversize material fragmentation ball grinding machine lining board:
S1, first steel scrap is melted in medium-frequency induction furnace, after being warming up to 1520-1580 ℃, add successively again metal ferrochrome, ferromanganese, molybdenum-iron to form melting charge, the pig iron is fused into molten iron and molten iron punching is melted and in melting charge, obtained mould material, be incubated after 5-20 minute and with pouring device, mould material be poured in the first mould and the second mould, cooling forming obtains a plurality of raised member and premolding liner plate plate body, and the major part of raised member can coordinate clamping with premolding liner plate plate body;
S2, the premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 300-350 ℃ by normal temperature, heating-up time 2-3 hour, soaking time is 1-2h; Subordinate phase is warming up to 500-550 ℃, heating-up time 1-2 hour, and soaking time is 0.5-1h; Phase III is warming up to 620-650 ℃, heating-up time 1-2 hour, and soaking time is 1-1.5h; Fourth stage is heated to 860～980 ℃, heating-up time is 30-40min, soaking time is 1-5 hour: the temperature of then quenching is rapidly that the mass percent concentration of 180～390 ℃ is in 35-45% sodium nitrate solution, and then hold-time 0.3-10 hour takes out and in air, be cooled to room temperature;
S3, again by temper, tempering temperature 300-500 ℃, tempering time 8-12 hour, obtains liner plate plate body and a plurality of protruding block;
S4, protruding block is fixed on board-like skeleton after Shot Blasting, then inserts liner plate plate body, be then preheated to 200-250 ℃, mould assembling, pours into high manganese steel sheet liquid solution, and teeming temperature is 1505-1540 ℃;
S5, the material obtaining is packed in heat treatment furnace, first the speed with 30-45 ℃/h is increased to 450-500 ℃, then the speed with 50-70 ℃/h is warming up to 1300-1550 ℃, after insulation 2-2.5h, send into oil quenching bath and carry out quench treatment, cool time is 20-30 minute, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
2. oversize material fragmentation ball grinding machine lining board according to claim 1, it is characterized in that, described liner plate comprises by weight percentage: C:1.8-2%, Si:0.28-0.3%, Mn:0.25-0.28%, Mo:1.8-2.1%, Cr:33-34.5%, Re:0.2-0.25%, P≤0.012%, S≤0.012%, surplus is Fe and other inevitable impurity.
3. according to oversize material fragmentation ball grinding machine lining board described in claim 1 or 2, it is characterized in that, in S2, premolding liner plate plate body after cooling forming and a plurality of raised member are put into process furnace and carry out austenitizing processing, come out of the stove to obtain liner plate blank and raised member blank, austenitizing is processed and is specifically comprised as the next stage: the first stage rises to 320 ℃ by normal temperature, and 2.5 hours heating-up times, soaking time is 1.5h; Subordinate phase is warming up to 550 ℃, and 1 hour heating-up time, soaking time is 0.5h; Phase III is warming up to 650 ℃, and 1 hour heating-up time, soaking time is 1.5h; Fourth stage is heated to 900 ℃, and the heating-up time is 35min, and soaking time is 3 hours: the temperature of then quenching is rapidly that the mass percent concentration of 350 ℃ is in 38% sodium nitrate solution, 5 hours hold-times, then takes out and in air, is cooled to room temperature.
4. according to oversize material fragmentation ball grinding machine lining board described in claim 1-3 any one, it is characterized in that, in S5, the material obtaining is packed in heat treatment furnace, first the speed with 32 ℃/h is increased to 480 ℃, and then the speed with 65 ℃/h is warming up to 1520 ℃, sends into oil quenching bath and carry out quench treatment after insulation 2h, cool time is 35 minutes, and cool to room temperature obtains oversize material fragmentation ball grinding machine lining board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410376951.9A CN104099524A (en) | 2014-07-31 | 2014-07-31 | Liner plate of ball mill for crushing large material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410376951.9A CN104099524A (en) | 2014-07-31 | 2014-07-31 | Liner plate of ball mill for crushing large material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110551933A (en) * | 2019-09-29 | 2019-12-10 | 马鞍山常裕机械设备有限公司 | Production process of high-chromium alloy steel ball |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059940A (en) * | 1991-06-24 | 1992-04-01 | 河北工学院 | High-toughness antiwear lining plate of big ball mill and manufacturing process thereof |
| CN101173343A (en) * | 2007-12-04 | 2008-05-07 | 北京工业大学 | High-strength abrasion-proof cast steel lining board and manufacturing method thereof |
| CN101956140A (en) * | 2010-09-28 | 2011-01-26 | 河南科技大学 | Lining plate for large ball mill and casting method thereof |
| CN101988174A (en) * | 2010-12-06 | 2011-03-23 | 宝钢集团新疆八一钢铁有限公司 | Large-scale ball mill liner and heat treatment method thereof |
| CN103667935A (en) * | 2013-11-19 | 2014-03-26 | 安徽省宁国市华达耐磨材料有限公司 | High-strength high-toughness material for lining plate of mine ball mill |
-
2014
- 2014-07-31 CN CN201410376951.9A patent/CN104099524A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059940A (en) * | 1991-06-24 | 1992-04-01 | 河北工学院 | High-toughness antiwear lining plate of big ball mill and manufacturing process thereof |
| CN101173343A (en) * | 2007-12-04 | 2008-05-07 | 北京工业大学 | High-strength abrasion-proof cast steel lining board and manufacturing method thereof |
| CN101956140A (en) * | 2010-09-28 | 2011-01-26 | 河南科技大学 | Lining plate for large ball mill and casting method thereof |
| CN101988174A (en) * | 2010-12-06 | 2011-03-23 | 宝钢集团新疆八一钢铁有限公司 | Large-scale ball mill liner and heat treatment method thereof |
| CN103667935A (en) * | 2013-11-19 | 2014-03-26 | 安徽省宁国市华达耐磨材料有限公司 | High-strength high-toughness material for lining plate of mine ball mill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110551933A (en) * | 2019-09-29 | 2019-12-10 | 马鞍山常裕机械设备有限公司 | Production process of high-chromium alloy steel ball |
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Effective date of abandoning: 20170510 |