CN1109384A - Cast iron lining plate of ball mill and its producing method - Google Patents
Cast iron lining plate of ball mill and its producing method Download PDFInfo
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- CN1109384A CN1109384A CN 94105108 CN94105108A CN1109384A CN 1109384 A CN1109384 A CN 1109384A CN 94105108 CN94105108 CN 94105108 CN 94105108 A CN94105108 A CN 94105108A CN 1109384 A CN1109384 A CN 1109384A
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Abstract
The method for producing lining plate of ball crusher uses cupola furnace to smelt, material containing Mn, Cn, W elements as furnace charge, and simplifies the heat treatment process, thus the metal phase of the lining plate is a composite tissue of martensite and bainite; the lining plate made by present method features high wear hardness nd shock resistance, no fracture, no deformation and long working life.
Description
The invention belongs to abrasion resistance of metal material and preparation thereof, is the ball mill liner plate and the production method thereof of all kinds of materials of grinding.
At present, industry multiselects such as China's cement, mine, electric power chemical industry are done milling equipment with the roller milling machine, and liner plate wherein is one of consumable accessory, and service life is shorter.This be because the liner plate of domestic production a kind of be the medium manganese nodular cast iron material made from cupola melting, each material is all matched by the chemical analysis of GB3180-82 regulation, made liner plate is thick big, process for cooling is difficult to control, liner plate matrix majority is a sorbite, sometimes even net carbide occurs, cause such liner plate unstable properties, early fracture in use easily takes place, carbon and low-alloy Cr-Mn-SI-Mo-Cu was that the material liner plate is at cement in the another kind in recent years, ore dressing, be employed in the industries such as generating, its manufacturing process is roughly electro-smelting-water-glass sand mold casting-quenching-temper, palpus employing arc melting during production in enormous quantities (can be with reference in February, 1993 " casting " periodical, the paper name is called " application of middle carbon complex alloy steel on big-and-middle-sized cement mill liner plate " and publishes at " North China electrodynamic journal " first-phase paper in 1991: " development of medium high carbon low-alloy steel ball grinding machine lining board ".）。Though the wear resistence the subject of knowledge and the object of knowledge of this type of material liner plate improves, but owing in preparation process, added valuable alloy material more and need be than the complicated heat treatment operation, it is big to exist producting process difficulty, and the higher and yield ratio of energy consumption is lower, is not easy to apply wait deficiency.Both made is that liner plates such as employed abroad rich chromium cast iron Cr15Mo3, ni-hard cast iron, medium carbon alloy steel also exist same problem.
The object of the present invention is to provide a kind of production method of cast iron lining plate, this method is fit to cupola melting, adopt the multicomponent microalloying technology, and the rich alloying elements such as Mn, Cu, W that contain of closing reason apolegamy China are made furnace charge, heat treatment step behind the simplification casting, making the liner plate phase structure is that martensite is matrix, and with the bainite of the right quantity complex tissue as second phase.The wearability and the impact flexibility of liner plate have greatly been improved.To overcome the existing in prior technology deficiency.
Alloy composition of the present invention, furnace charge kind and production method are:
A kind of ball mill cast iron lining plate and production method thereof are that liner plate is Si, Mn, Cu, Ta, Ti, Nb, polynary and microalloying material such as W, adopt metallurgical melting, sand casting and quenching, the tempering heat treatment operation is made, each chemical analysis degree in the liner plate alloy is C:3.0-3.8, Si:1.5-2.5, Mn:1.0-2.0, Cu:2.0-3.0, W:0.1-1.2, Nb: trace-0.5, Ti: trace-0.2, Ta: trace, RE: trace, Mg: trace, surplus is Fe, wherein P＜0.1, S＜0.03, the structure of liner plate is that martensite is matrix, and there is the right quantity bainite to do the complex tissue of second phase, liner plate hardness is HRC53-56, and impact flexibility ak is 13.5J/cm
2-18J/cm
2
The production method of liner plate is:
A, apolegamy furnace charge: according to the chemical analysis and the yield of alloy batching of liner plate, used furnace charge is foundry iron, foundry returns, steel scrap, ferromanganese, ferrosilicon, tungsten slag ferroalloy or ferrotungsten, cathode copper, low rare-earth silicon alloy, ferrotianium, ferro-niobium;
B, melting: with the melting in the stove of packing into by a certain percentage of each furnace charge of institute apolegamy, the tapping temperature that makes smelting furnace is 1400 ℃-1500 ℃;
C, nodularization, inoculation: adopt low rare earth magnesium ferrosilicon alloy to make nodulizer, 75Si-Fe, Ti-Te make inovulant and carry out stokehold nodularization and inoculation, and the pregnant amount of 75Si-Fe, Ti-Te is respectively 0.5-1% and 0.05%;
D, casting and heat treatment: adopt greensand mold room temperature knockout casting, after the cleaning liner plate is inserted resistance furnace or reverberatory furnace and be heated to 840 ℃, be incubated 2 hours, when being cooled to 350 ℃-450 ℃ in the aqueous solution of quenching after the taking-up, propose liner plate and insert the anti-slow cooling of insulation rapidly to room temperature, again with the liner plate temper, temperature is 250 ℃-300 ℃, be incubated 3-4 hour, cooling is the liner plate finished product after the tempering.
Each furnace charge matched and quenching with the proportioning of solution are:
Each furnace charge is with foundry iron, foundry returns, steel scrap, cathode copper, tungsten slag iron contains gold and is main furnace charge, with ferrosilicon, the ferromanganese ferrotianium, low rare earth ferrosilicon alloy is an additive, each gross weight of adding furnace charge accounts for the 3.8-7% of each main furnace charge gross weight, steel scrap accounts for 5-10% in each main furnace charge, cathode copper is 2-3%, tungsten slag ferroalloy is 5-12%, surplus is the foundry iron foundry returns, the relative weight ratio of the two is 1: 0.3-0.5, each adds the addition of furnace charge and the weight ratio of total furnace charge is respectively: ferrosilicon 0.5-2%, ferromanganese 1.5-3%, ferrotianium 0.05-0.08%, ferro-niobium 0.3-0.5%, low rare earth ferrosilicon alloy 1.5-1.8%, hydrated glass 18-20% in the Quenching Treatment aqueous solution, sodium chloride 8-10%, sodium carbonate 8-10%, potassium hydroxide 05-1%, surplus is a water, and water temperature is 20 ℃-60 ℃.
The parameter declaration of Equipment for Heating Processing and relevant composition is:
The heat treatment heating furnace is car-type resistance or coal-fired reverberatory furnace, and the tungsten slag ferroalloy in the used furnace charge is the slag of refining tungsten alloy.
The micro-scope of contained material is in the chemical analysis of liner plate: 0.01%-0.05%.
Various embodiments of the present invention are as follows:
Embodiment 1, with 3 tons/hour cupola meltings, used furnace charge is foundry iron 55%, foundry returns 20%, steel scrap 10%, cathode copper 2.5%, tungsten slag alloy 8%.Additive: ferrosilicon is 0.85%, ferromanganese 2%, ferrotianium 0.05%, low rare earth alloy 1.6%.
Tapping temperature is 1450 ℃, carries out spheroidising with low rare earth, magnesium Antaciron, carries out inoculation with 75Si-Fe, Ti-Te, and pregnant amount is respectively 0.5-1% and 0.05%.Heat treatment step behind the liner plate moulding by casting as described above.Wherein used heating furnace is a bench vehicle type electrical resistance furnace, and temperature is 850 ℃, is incubated 3 hours.Quenching with hydrated glass in the solution 18%, sodium carbonate 8%, sodium chloride 8%, potassium hydroxide 1%, surplus is fire.Quenching rear lining plate temperature is 350 ℃.Temperature be 250 ℃ and be incubated 4 hours after air cooling.
The content of each composition (weight %) is C:3.3, Si:1.87, Mn:1.25, Cu:2.5, W:0.8, Nb:0.8, Ti:0.06, RE:0.02, Mg:0.035 in the made liner plate, and surplus is an iron.The metallographic structure of liner plate as described above, liner plate hardness is HRC55, impact flexibility ak=13.5J/cm
2
Embodiment 2: each charging weight percentage is: foundry iron 55%, foundry returns 25%, steel scrap 10%, cathode copper 2.1%, ferrotungsten 1.5%, ferromanganese 3%, ferrosilicon 1.55%, ferrotianium 0.05%, low rare earth ferrosilicon alloy 1.5%, ferro-niobium 0.3%.
Tapping temperature, spheroidising, inoculation and heat treatment step, process conditions are the same.
Each component content (weight %) is C:3.6, Si:2.45, Mn:1.8, Cu:2.01, W:1.05, Nb:0.04, Ti:0.03, RE:0.015, Mg:0.038 in the liner plate of making, and surplus is an iron.Liner plate hardness is HRC=56, impact flexibility ak=14J/cm
2
Embodiment 3: each charging weight percentage is: foundry iron 55%, foundry returns 20%, steel scrap 10%, cathode copper 3%, tungsten slag ferroalloy 6%, ferromanganese 2.45%, ferrosilicon 1.4%, ferrotianium 0.05%, ferro-niobium 0.5%, low rare earth magnesium ferrosilicon alloy 1.6%.
Method for production is identical with embodiment 1.
Each component content (weight %) is C:3.7, Si:2.23, Mn:1.5, Cu:2.8, W:0.5, Nb:0.05, Ti:0.07, RE:0.025, Mg:0.032 in the liner plate, and surplus is an iron.Liner plate hardness is HRC=53, impact flexibility ak=18J/cm
2
Substantive distinguishing features that the present invention has and obtained remarkable technological progress are:
1, because the mechanical performance of liner plate depends on its chemical analysis and metallographic structure. Comparatively desirable chemical analysis and metallographic structure are by reasonably matching furnace charge and suitable casting and Technology for Heating Processing. Its chemical analysis design of the liner material quality that the present invention produces is exactly rationally to add a certain amount of alloying element and adopted accordingly corresponding casting and heat treatment step and process conditions in the Fe-Si alloy. Make a concrete analysis of as follows:
Manganese enlarges austenite region strongly, suppresses perlitic transformation, and stable austenite can obviously improve alloy quenching degree. The effect of tungsten is to significantly improve quenching degree, and the effect with stronger promotion bainitic transformation, tungsten both can be deeper than in ferrite or the austenite admittedly, can form again carbide and complicated carbide, energy is refinement carbide and crystal grain obviously, and therefore adding an amount of tungsten can carry heavy alloyed comprehensive mechanical performance. Copper can improve quenching degree, especially work as copper, during the tungsten coexistence, the effect that improves quenching degree is more remarkable, and copper moves right the pearlite region in the continuous cooling transformation (CCT) diagram, the bainite transformation district is moved to left, so copper has the effect that promotes bainite transformation, the present invention strengthens copper content to 2-3%, thereby can obtain a greater number bainite structure, trace alloying element Nb, Ta, Ti can adopt corresponding ferroalloy or tungsten slag alloy to add as furnace charge, energy and C in molten refining process, N forms high melting compound, and improves intensity as outer benefit nucleus with crystal grain thinning, impact flexibility and wearability. Nb, Ta, Ti can partly be dissolved in the quenching degree that has improved alloy in the austenite be conducive to obtain martensite, bainite structure in heat treatment process elsewhere.
2, the present invention utilizes cupola melting and simple heat place on the basis of rationally preparing burden The liner plate of science and engineering skill production machinery better performances, the material cost of not only having saved the alloy decreases such as expensive Cr-Fe, Ni, Mo, and simplified casting and heat treatment step makes manufacturing process be easy to grasp, easy to utilize.
3, the liner plate of producing compare with other material liner plates have higher anti-wear performance, impact resistance (wearability be potassium steel 3-4 doubly), in use non-cracking, metaboly take place, its life-span is longer more than 3 times than high manganese steel lining plate.
Claims (4)
1, a kind of ball mill cast iron lining plate and production method thereof are that liner plate is Si, Mn, Cu, Ta, Ti, Nb, polynary and microalloying material such as W, adopt metallurgical melting, sand casting and quenching, the tempering heat treatment operation is made, it is characterized in that each the chemical analysis degree in the liner plate alloy is: C:3.0-3.8, Si:1.5-2.5, Mn:1.0-2.0, Cu:2.0-3.0, W:0.1-1.2, Nb: trace-0.5, Ti: trace-0.2, Ta: trace, RE: trace, Mg: trace, surplus is Fe, P＜0.1 wherein, S＜0.03, the structure of liner plate is to be matrix with martensite, and there is the right quantity bainite to do the complex tissue of second phase, liner plate hardness is HRC53-56, and impact flexibility ak is 13.5J/cm
2-18J/cm
2
The production method of liner plate is:
A, apolegamy furnace charge: according to the chemical analysis and the yield of alloy batching of liner plate, used furnace charge is foundry iron, foundry returns, steel scrap, ferromanganese, ferrosilicon, tungsten slag ferroalloy or ferrotungsten, cathode copper, low rare earth ferrosilicon alloy, ferrotianium, ferro-niobium;
B, melting: with the melting in the stove of packing into by a certain percentage of each furnace charge of institute apolegamy, the tapping temperature that makes smelting furnace is 1400 ℃-1500 ℃;
C, nodularization, inoculation: adopt low rare earth magnesium ferrosilicon alloy to make nodulizer, 75Si-Fe, Ti-Te make inovulant and carry out stokehold nodularization and inoculation, and the pregnant amount of 75Si-Fe, Ti-Fe is respectively 0.5-1% and 0.05%;
D, casting and heat treatment: adopt greensand mold room temperature knockout casting, after the cleaning liner plate is inserted resistance furnace or reverberatory furnace and be heated to 840 ℃, be incubated 2 hours, when being cooled to 350 ℃-450 ℃ in the aqueous solution of quenching after the taking-up, propose liner plate and insert the holding pit slow cooling rapidly to room temperature, again with the liner plate temper, temperature is 250 ℃-300 ℃, be incubated 3-4 hour, cooling is the liner plate finished product after the tempering.
2, liner plate according to claim 1 and method thereof, it is characterized in that each furnace charge is with foundry iron, foundry returns, steel scrap, cathode copper, tungsten slag iron contains gold and is main furnace charge, with the fero-manganesesilicon ferrotianium, low rare earth ferrosilicon alloy is an additive, each gross weight of adding furnace charge accounts for the 3.8-7% of each main furnace charge gross weight, steel scrap accounts for 5-10% in each main furnace charge, cathode copper is 2-3%, tungsten slag ferroalloy is 5-12%, surplus is the foundry iron foundry returns, the relative weight ratio of the two is 1: 0.3-0.5, each adds the addition of furnace charge and the weight ratio of total furnace charge is respectively ferrosilicon: 0.5-2%, ferromanganese 1.5-3%, ferrotianium 0.05-0.08%, ferro-niobium 0.3-0.5%, low rare earth ferrosilicon alloy 1.5-1.8%, hydrated glass 18-20% in the Quenching Treatment aqueous solution, sodium chloride 8-10%, sodium carbonate 8-10%, potassium hydroxide 05-1%, surplus is a water, and water temperature is 20 ℃-60 ℃.
3, according to claim 1 or 2 described plate and production methods thereof, it is characterized in that the heat treatment heating furnace is bench vehicle type electrical resistance furnace or burning reverberatory furnace, the tungsten slag ferroalloy in the used furnace charge is the slag of refining tungsten alloy.
4,, it is characterized in that the micro-scope that contains material in the chemical analysis of liner plate is: 0.01%-0.05% according to described liner plate of claim 1 and production method thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94105108 CN1039975C (en) | 1994-05-12 | 1994-05-12 | Cast iron lining plate of ball mill and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94105108 CN1039975C (en) | 1994-05-12 | 1994-05-12 | Cast iron lining plate of ball mill and its producing method |
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| Publication Number | Publication Date |
|---|---|
| CN1109384A true CN1109384A (en) | 1995-10-04 |
| CN1039975C CN1039975C (en) | 1998-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94105108 Expired - Fee Related CN1039975C (en) | 1994-05-12 | 1994-05-12 | Cast iron lining plate of ball mill and its producing method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436001C (en) * | 2006-04-26 | 2008-11-26 | 孙荣玖 | Process for manufacturing rare earth high-carbon low-alloy steel liner |
| CN102350395A (en) * | 2011-10-24 | 2012-02-15 | 攀枝花市立宇矿业有限公司 | Wear-resisting metallic liner plate with hole patterns and manufacturing method thereof |
| CN102392197A (en) * | 2011-08-09 | 2012-03-28 | 苏州卡波尔模具科技有限公司 | Niobium-silicon ferroalloy glass mould |
| CN102399960A (en) * | 2011-11-03 | 2012-04-04 | 太原钢铁(集团)有限公司 | Cracking-resistant treatment method for bowl mill grid plate |
| CN102784886A (en) * | 2012-08-05 | 2012-11-21 | 胡立仁 | Casting method of lining plate of ball mill |
| CN103934422A (en) * | 2014-04-08 | 2014-07-23 | 大丰市飞腾铸造机械有限公司 | Casting process of abrasion-resistant low-porosity shot blasting machine vane |
| CN104307605A (en) * | 2014-05-26 | 2015-01-28 | 宁国市鑫煌矿冶配件制造有限公司 | Wear-resistant ball mill liner with high toughness and high hardness |
| CN107684970A (en) * | 2017-08-25 | 2018-02-13 | 洛阳博林合金材料有限公司 | A kind of lining board of crusher and preparation method thereof |
| US10543985B2 (en) * | 2015-01-19 | 2020-01-28 | Flsmidth A/S | Interlocking wear-resistant panel system |
| CN116397157A (en) * | 2023-04-12 | 2023-07-07 | 盐城市震业机械有限公司 | Spheroidal graphite cast iron product and preparation method thereof |
Families Citing this family (1)
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| CN101455986B (en) * | 2007-12-14 | 2012-05-23 | 鞍钢集团矿业公司 | Crusher duplex metal abrasion-proof backing block and manufacture method thereof |
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1994
- 1994-05-12 CN CN 94105108 patent/CN1039975C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436001C (en) * | 2006-04-26 | 2008-11-26 | 孙荣玖 | Process for manufacturing rare earth high-carbon low-alloy steel liner |
| CN102392197A (en) * | 2011-08-09 | 2012-03-28 | 苏州卡波尔模具科技有限公司 | Niobium-silicon ferroalloy glass mould |
| CN102350395A (en) * | 2011-10-24 | 2012-02-15 | 攀枝花市立宇矿业有限公司 | Wear-resisting metallic liner plate with hole patterns and manufacturing method thereof |
| CN102350395B (en) * | 2011-10-24 | 2014-04-23 | 攀枝花市立宇矿业有限公司 | Wear-resisting metallic liner plate with hole patterns |
| CN102399960A (en) * | 2011-11-03 | 2012-04-04 | 太原钢铁(集团)有限公司 | Cracking-resistant treatment method for bowl mill grid plate |
| CN102784886A (en) * | 2012-08-05 | 2012-11-21 | 胡立仁 | Casting method of lining plate of ball mill |
| CN103934422A (en) * | 2014-04-08 | 2014-07-23 | 大丰市飞腾铸造机械有限公司 | Casting process of abrasion-resistant low-porosity shot blasting machine vane |
| CN103934422B (en) * | 2014-04-08 | 2016-06-15 | 大丰市飞腾铸造机械有限公司 | A kind of casting technique of wear-resisting low pore shot blast machine blade |
| CN104307605A (en) * | 2014-05-26 | 2015-01-28 | 宁国市鑫煌矿冶配件制造有限公司 | Wear-resistant ball mill liner with high toughness and high hardness |
| US10543985B2 (en) * | 2015-01-19 | 2020-01-28 | Flsmidth A/S | Interlocking wear-resistant panel system |
| CN107684970A (en) * | 2017-08-25 | 2018-02-13 | 洛阳博林合金材料有限公司 | A kind of lining board of crusher and preparation method thereof |
| CN116397157A (en) * | 2023-04-12 | 2023-07-07 | 盐城市震业机械有限公司 | Spheroidal graphite cast iron product and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039975C (en) | 1998-09-30 |
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