WO2012027964A1 - 水泥工业管磨机衬板的制造方法 - Google Patents

水泥工业管磨机衬板的制造方法 Download PDF

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Publication number
WO2012027964A1
WO2012027964A1 PCT/CN2011/001476 CN2011001476W WO2012027964A1 WO 2012027964 A1 WO2012027964 A1 WO 2012027964A1 CN 2011001476 W CN2011001476 W CN 2011001476W WO 2012027964 A1 WO2012027964 A1 WO 2012027964A1
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Prior art keywords
liner
lining
ceramic
mill
tube mill
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PCT/CN2011/001476
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English (en)
French (fr)
Inventor
李小如
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华智节能(香港)有限公司
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Priority to AU2011298680A priority Critical patent/AU2011298680B2/en
Priority to US13/816,463 priority patent/US10058958B2/en
Priority to EP11820994.9A priority patent/EP2612709A4/en
Priority to JP2013526300A priority patent/JP5926259B2/ja
Publication of WO2012027964A1 publication Critical patent/WO2012027964A1/zh

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating 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
    • B02C17/18Details
    • B02C17/22Lining for containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00Restoring or reconditioning objects
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632Organic additives
    • C04B35/634Polymers
    • C04B35/63448Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63452Polyepoxides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/02Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
    • C04B37/023Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
    • C04B37/025Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of glass or ceramic material
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/02Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
    • C04B37/028Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles by means of an interlayer consisting of an organic adhesive, e.g. phenol resin or pitch
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/04Ceramic interlayers
    • C04B2237/06Oxidic interlayers
    • C04B2237/062Oxidic interlayers based on silica or silicates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/34Oxidic
    • C04B2237/343Alumina or aluminates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/40Metallic
    • C04B2237/405Iron metal group, e.g. Co or Ni
    • C04B2237/406Iron, e.g. steel
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/84Joining of a first substrate with a second substrate at least partially inside the first substrate, where the bonding area is at the inside of the first substrate, e.g. one tube inside another tube
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/86Joining of two substrates at their largest surfaces, one surface being complete joined and covered, the other surface not, e.g. a small plate joined at it's largest surface on top of a larger plate
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/60Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49718Repairing
    • Y10T29/49732Repairing by attaching repair preform, e.g., remaking, restoring, or patching

Definitions

  • the invention belongs to the field of machinery and relates to an industrial tube mill, in particular to a novel liner structure for a cement industrial tube mill and a manufacturing method thereof.
  • the working conditions of the existing cement industry tube mill inner liner are medium and low pressure, medium and low impact force.
  • the reciprocating force failure frequency is less than 10 7th power, which is low cycle fatigue.
  • the type of wear is medium to low stress abrasion type abrasive wear. This working condition is collectively referred to as the "small energy, repeated impact" working conditions.
  • the lining plate manufacturing of tube mills for cement industry at home and abroad has used steelmaking equipment such as electric arc furnaces and power frequency furnaces. After batching and smelting, the lining plates are made of sand or metal, and then cast. Cast steel wear-resistant material liner made of heat and heat.
  • the mechanical and physical properties are as follows: Rockwell hardness HRC is about 55 ⁇ 60; impact value a k is 4 ⁇ 8J/cm 2 ; metallographic structure is martensite plus carbide.
  • the submicroscopic morphology of the carbide is a continuous network, and the role played inside the steel material is the destruction of microcracks. Only when the meshed carbide is broken, the mechanical and physical properties of the liner material will be greatly improved and improved. This is also the goal of long-term struggle of science and technology workers, but so far has had little effect. This is also one of the key technologies for the poor service life of steel wear-resistant materials.
  • ⁇ 3. 8 ⁇ 13m tube mill liner thickness is above 65mm, and the total weight of the lining device is 105T. Due to the thick lining and the heavy weight, the fixing method in the grinding cylinder can only be fixed by bolt connection, the total number of drill holes on the cylinder can be as high as 1632 holes, which seriously weakens the rigidity and strength of the cylinder. According to the economic maintenance cycle (lifetime), the thickness of the lining should be about 65mm, and the size of each lining is about 250 X 350 X 60. The weight of each piece is about 44 kg. Under such conditions, there have been proposals for fixing in other ways, such as the method of fixing and pasting and bonding using adhesives, which were tested in the 1960s. However, if there is a slight accidental fall during installation, a major personal accident will occur, or a major equipment accident will occur when the liner is broken in the grinding.
  • the service life of the steel industry wear-resistant material lining of the cement industry tube mill has not been a major breakthrough, and has been hovering for 7000 ⁇ 10000 hours.
  • the total amount of pipe mill linings consumed by the cement industry in mainland China is as high as 300,000 tons per year.
  • Reform the lining fixing method realize the drilling cylinder without drilling or less drilling to increase the rigidity and strength of the cylinder, and ensure the reliable operation of the equipment. Waiting has always been the result of the dreams of science and technology workers, and it still has little effect to this day.
  • the impact value a k and the Rockwell hardness HRC of the steel wear resistant material are not compatible.
  • Rockwell hardness HRC must be sacrificed; to increase the Rockwell hardness HRC, the impact value a k must be reduced.
  • the impact value a k reaches 20 ⁇ 30J/cm 2 , its Rockwell hardness can only reach 40 ⁇ 45 level. In order to extend the wear time, there must be enough liner thickness to meet the economic maintenance cycle (lifetime). Need.
  • the post-tube mill Under the condition of pre-grinding process, the post-tube mill mainly relies on the grinding function for grinding. At this time, the material of the tube mill liner only needs to have a suitable impact value a k (4 ⁇ 6J/cm 2 ), and the higher the better the Rockwell hardness HRC (preferably 55 ⁇ 60) is to resist. Grinding wear gives a sufficient service life. This is only possible at a low a k value to increase HR (:. In fact, the development of the current liner technology is greatly lagging behind. This also provides space and opportunities for the development of the technology of the present invention.
  • the present invention provides a new industrial tube mill whose weight is much lower than that of the existing tube mill.
  • the lining substrate of the desired geometry is formed by hot and cold die pressing of the ordinary medium-low carbon steel plate, and then the surfacing layer is deposited on the surface of the lining substrate to form a pipe mill lining.
  • Ceramic liner There are two types of ceramic liners:
  • the raw material of the ceramic liner is prepared according to the composition of the corundum ceramic, and then pressed by a metal mold under a press. It is sent to the high-temperature furnace for roasting, and the furnace cooling is directly made into a wear-resistant ceramic liner for the cement industry tube mill. The size can be determined according to different specifications of the mill.
  • the solidified material of the above two kinds of linings which are fixedly fixed in the grinding cylinder body may be embossed, pasted, and partially welded in the steel body of the grinding cylinder by the above-mentioned cured product. Construction is still convenient.
  • the tube mill barrel can also be drilled or drilled less.
  • the corrugated ceramic lining of the strips, the sheets, and the block shapes of the embossed space in which the metal lining plate is combined with the cylindrical body is formed into a combined lining.
  • the service life of this new modular liner can be further enhanced and extended, which is not possible with any type of liner currently in use.
  • the new composite liner produced by the present invention is then embedded, adhered, and partially welded to the milled steel sheet by means of the cured product.
  • the cement industry pipe mill liner can save more than 50% of steel consumption, which can save more than 100,000 tons of steel consumption for the pipe mill of cement industry in China.
  • connection mode of the liner of the current tube mill is changed from bolted to inlaid, pasted and partially spliced, so that the grinding cylinder has no drilling and less drilling.
  • Figure 1 is a schematic view showing the structure of a metal liner.
  • Figure 2 is a schematic illustration of the application of a non-metallic liner to a tube mill.
  • Figure 3 is a schematic illustration of the application of a combined liner to a tube mill.
  • the invention provides a new industrial tube mill, and the method for manufacturing the new liner and the application thereof have three technical solutions:
  • the surface of the lining substrate 2 is deposited with a weld layer 1 of a high hardness metal or a metal-non-metal composite material of 5 to 15 mm thick.
  • the surfacing materials can be: domestic TN-65 or TM-65; German UM10-65-G or MF10-GF-60-G welding rod; or Belgian high-hardness surfacing electrode.
  • the hardness of the surfacing layer 1 can reach 70 to 80, and the impact value a k can still meet the requirements of 4 to 6 J/cm 2 .
  • the new type of tube mill made in this way is soft and soft, and it is an ideal combination and match. At the same time, it is also the ideal liner for the cement industry's tube mill grinding function.
  • the cured product 5 may be a high-strength cement mortar, or an epoxy resin or an inorganic adhesive. Among them: high-strength cement mortar (525 cement and fine sand ratio is 1: 1. 5 ⁇ 2 . 0, three-day flexural strength can reach 5.
  • the ceramic liner 3 can be processed in two ways:
  • the second is that the raw materials are formulated according to the composition of the corundum ceramics.
  • the composition of the corundum ceramic is prior art, and then it is press-formed under a press of 1500 to 2000 T using a metal mold. It is directly sent into a high-temperature furnace and fired at a temperature of 1600 ⁇ 1800 °C. It is directly cooled in about 1 hour and is directly made into a wear-resistant ceramic liner for cement industrial pipe mills.
  • the size can be determined according to the different specifications of the mill. The thickness can be controlled within 30mm. The size can also be 100 X 100 X 30mm, 200 X 200 X 30mm, 300 X 300 X 30, etc.
  • the surface geometry is determined by us.
  • the corrugated size is made.
  • the impact value a k of the corundum ceramic is not below 10 J/cm2, and the hardness of the corundum ceramic is unique.
  • the value is unmatched by any steel wear-resistant material, and its hardness value HRC can reach 85 ⁇ 95.
  • the hardness of sharp steel HRC is only 75 ⁇ 80.
  • Compressive strength 700 ⁇ 900kg/cm'
  • the novel surfacing lining plate produced by the present invention can be specially lining in the concave and convex space combined with the inner surface of the grinding cylinder steel plate 4 when the hardened material 5 is inlaid, pasted and partially welded in the grinding cylinder steel plate 4.
  • the ceramic liner 3 with different shapes of strips, sheets and blocks is the corundum ceramic liner 3.
  • the hardness of the non-metallic wear-resistant material can be as high as 85 ⁇ 95. Even after the surfacing lining is completely worn, the tube mill can still work normally for a long time, and the service life of the new surfacing lining is further strengthened and extended, which is impossible with any type of lining currently available.
  • the invention is freed from the constraint of the material properties of the steel material, and realizes the inner soft outer steel and the hardness of the surfacing welding can reach 70 ⁇ 80, in order to wear and improve life, we must first increase the hardness of the material.
  • the performance of corundum ceramics is even better. Therefore, the present invention reduces the thickness of the lining by a factor of two, and the doubling of the service life is a minimum effect.
  • the cast liner Due to the heavy weight of the current cast liner, especially with the enlargement of the tube mill, the cast liner is heavier. In order to prevent the occurrence of major accidents, the installation in the cylinder can only be carried out by means of fixing the bolts on the cylinder. The total number of perforations on the cylinder is up to 1600, which seriously weakens the rigidity and strength of the cylinder. .
  • the weight of the area of the tube-welded lining and the ceramic lining of the present invention is reduced by 2.4 times and 4.3 times, respectively, and the method of inserting, pasting and local welding can be safely used, and the cylinder is truly allowed. Achieve no drilling and less drilling.
  • the tube mill liner is changed from hot-working casting to cold-stacking and post-welding. It simplifies the manufacturing method and improves the labor, labor, and labor-intensive production conditions. Automated operation is possible.
  • the grinding body loading can be increased by 24 tons, which can increase the mill output by 10 15%.
  • the bolt fixing can be completely eliminated, and the cement setting, pasting and partial welding method can be adopted, so that the grinding cylinder body can be free from drilling and less drilling, thereby avoiding the rigidity of the cylinder and Intensity damage improves the reliability of equipment operation and avoids damage to strength and stiffness up to 20 30%

Description

水泥工业管磨机衬板的制造方法 技术领域
本发明属于机械领域, 涉及一种工业管磨机, 尤其涉及一种水泥工业管 磨机用的新型衬板结构及其制作方法。
现有技术
现有水泥工业管磨机内衬板的工作条件是中低压, 中低冲击力。 往复受 力失效频数小于 10 的 7次方, 属低循环疲劳。 磨损类型为中低应力擦伤式 磨粒磨损。 这种工作条件统称为 "小能量、 多次重复冲击" 的工作条件。
迄今为止, 国内外水泥工业用管磨机的衬板制造都是运用电弧炉、 工频 炉等炼钢设备, 经过配料、 熔炼, 并同时将衬板做出沙型或金属型, 然后浇 铸、 出型、 热处理而成的铸造钢铁耐磨材料衬板。 其机械物理性能指标为: 洛氏硬度 HRC在 55〜60左右; 冲击值 a k在 4〜8J/cm2 ; 金相组织为马氏体加 碳化物。 其碳化物的亚微观形态为连续网状, 在钢铁材料内部起到的作用是 微裂纹的破坏作用。 网状碳化物只有在破网的条件下, 衬板材料的机械物理 性能才会有较大幅度的改善和提高。 这也是科技工作者长期奋斗的目标, 但 至今收效甚微。 这也是钢铁耐磨材料使用寿命不佳的技术关键之一。
因此, 现行水泥工业管磨机衬板都采用大铸造厚度来保证理想的维修周 期和合适的使用寿命。
例如: Φ 3. 8 Χ 13m管磨机衬板厚度都在 65mm以上, 内衬装置总重量达 105T。 由于衬板厚, 重量大, 其在磨筒体内的固定方法只能采用螺栓连接固 定, 则在筒体上的钻孔总数可高达 1632孔, 严重削弱了筒体的刚度和强度。 根据经济性维修周期 (使用寿命) 的需要, 衬板厚度应该在 65mm 左右, 每 块衬板的尺寸大致为 250 X 350 X 60醒, 则每块重量约在 44 kg左右。 这样的 条件下, 有人提出以其他方式进行固定的方案, 如在上个世纪六十年代曾做 过试验, 采用胶粘剂进行镶砌和粘贴的固定方法。 但稍有不慎在安装时垮落 会发生重大人身事故, 或运转时衬板在磨内垮落会发生重大设备事故。
若想减小尺寸来减轻重量,在衬板厚度不减薄的情况下,是无法实现的。 随着磨机的大型化,磨内衬板的尺寸越来越大,就更不适宜用胶黏剂粘贴了。
长期以来水泥工业管磨机铸造钢铁耐磨材料衬板的使用寿命一直没有 重大突破, 一直徘徊在 7000〜 10000小时。 中国大陆水泥工业每年消耗的管 磨机衬板总量就高达 30余万吨。 大幅度延长衬板使用寿命, 节省钢材消耗, 无论对节能和环保都具有十分重大的经济意义。 如何减少衬板厚度和重量、 增加研磨体填充量、 大幅度提高磨机产量; 改革衬板固定方式、 实现磨筒体无钻孔或少钻孔从而增加筒体刚度和强度, 保证设备运行可靠等等一直是科技工作者梦寐以求的成果, 时至今日仍收效 甚微。
随着粉磨技术的发展, 上世纪八十年代预粉磨技术的应用可以大幅度节 省能源逐渐被人们认识。 在现行水泥工业管磨机的前道逐步安装挤压机、 立 磨、 小短磨等预粉磨设备己是大势所趋。 这样, 管磨机的入磨物料粒度已经 从原来的 25〜30議下降到 1讓以下, 甚至逐渐下降为 150〜200m2 1 kg比表 面积。 因此, 管磨机粉磨的力学性能发生了根本的变化。 一言以蔽之, 管磨 机衬板在粉磨作业中所受到的冲击力大大下降了。
由此,对管磨机衬板材质的要求不再是: "为了抵御冲击力不发生断裂, 不但需要良好的抗冲击韧性 a k值 (20〜30J/cm2 ) , 同时也很需要有一定的 断面, 这个断面就是衬板厚度。 "
钢铁耐磨材料的冲击值 a k和洛氏硬度 HRC两者是不可兼得的。要想提高 冲击值 a k, 必须牺牲洛氏硬度 HRC; 要提高洛氏硬度 HRC, 必须降低冲击值 a k。 当冲击值 a k达到 20〜30J/cm2时其洛氏硬度充其量只能达到 40〜45的 水平, 这时为了延长磨耗时间必须有足够的衬板厚度去满足经济性维修周期 (使用寿命) 的需要。
在具有预粉磨工艺的条件下, 后管磨机主要依靠研磨功能进行粉磨。 这 时管磨机衬板材质只需要有适当冲击值 a k ( 4〜6J/cm2 ) 的前提下, 需要有 越高越好的洛氏硬度 HRC (最好能达到 55〜60 ) 来抵御粉磨磨损获得足够的 使用寿命。 这只是在低 a k值时才有可能提高 HR (:。 事实上现行衬板技术的发 展是大大滞后的。 这也为本发明技术提供了发展空间和机遇。
发明内容
本发明为了提高管磨机衬板材料的机械物理性能,提供一种新的工业管 磨机, 其重量比现有管磨机大为降低。
本发明高性能新型衬板的制作方法有三种技术方案:
1 ) 金属衬板
以普通中低碳钢钢板采用冷热模冲压成型出所需几何形状的衬板基材, 然后在衬板基材表面堆焊出堆焊层, 制作成管磨机衬板。 在磨筒体内安装衬 板: 采用高强度水泥砂浆、 环氧树脂或各种无机胶黏剂等作为固化物, 将衬 板镶砌、 粘贴, 以及用局部悍接的方式连接在磨筒体钢板内。
2 ) 陶瓷衬板 有两种类型的陶瓷衬板:
A、 利用现有陶瓷厂的生产技术和设备, 我们只要提供各种所需的条、 片、 块、 板尺寸及表面几何形状的图样, 然后陶瓷厂按照图样重幵模具, 即 可生产出我们所需的陶瓷衬板。
B、 陶瓷衬板的原料是按照刚玉陶瓷的成分配制, 然后采用金属模具在 压力机下压制成型。 送入高温炉内焙烧, 出炉冷却直接制成是水泥工业管磨 机用耐磨陶瓷衬板, 尺寸大小可根据磨机不同规格具体确定。
上述两种衬板在磨筒体内的安装固接的固化物可以用上述固化物进行 镶砌、 粘贴, 以及局部用焊接的方式连接在磨筒体钢板内。 施工仍然是方便 的。 管磨机筒体也可是无钻孔或少钻孔的。
3 ) 组合式衬板
将上述金属衬板与筒体结合的凹凸空间里衬置条、 片、 块形状不等的刚 玉陶瓷衬板, 形成组合式衬板。 这种新型组合式衬板的使用寿命可得到进一 步强化和延长, 这是现行任何形式的衬板都无法做到的。 然后将本发明制作 的新型组合式衬板用所述的固化物镶砌、 粘贴, 以及用局部焊接的方式安装 在磨筒体钢板内。
本发明的优点是
1、 在相同基准条件下水泥工业管磨机衬板重量在现有基础上减轻 50%。
2、 在相同基准条件下水泥工业管磨机衬板的使用寿命提高一倍达到 15000〜20000小时。
3、 在相同基准条件下水泥工业管磨机衬板节省钢材消耗 50%以上, 可为 中国大陆水泥工业管磨机衬板的钢材消耗量节省 10万吨以上的水平。
4、 将现行管磨机的衬板连接方式由螺栓连接改为镶砌、 粘贴和局部悍 接, 从而实现磨筒体无钻孔和少钻孔。
5、 由于耐磨陶瓷极其优越的性能 (洛氏硬度可达 85〜90以上) , 加工 性能也极好, 只要配好料, 可直接模压成型烧制成管磨机衬板。 创出 "以陶 代钢" 的新技术路线。 在水泥工业管磨机衬板制作方面, 无论是节省钢材消 耗还是提高磨机使用寿命都会有重大突破。
附图说明
图 1是金属衬板的结构示意图。
图 2是非金属衬板应用在管磨机上的示意图。
图 3是组合式衬板应用在管磨机上的示意图。
图中标记: 1、 堆焊层, 2、 衬板基材, 3、 陶瓷衬板, 4、 磨筒体钢板, 5、 固化物。
具体实施方式
本发明提供一种新的工业管磨机, 其新型衬板的制作方法及其应用有三 种技术方案:
1 ) 刚柔兼备组合制作管磨机衬板
参见图 1, 本发明以普通中低碳钢钢板 δ =10〜12讓, 采用 1000〜2000Τ 压力机冷热模冲压成型出所需的衬板几何形状作为衬板基材 2, 然后在成型 的衬板基材 2表面堆焊 5〜15mm厚的高硬度金属或金属一非金属复合材料的 堆焊层 1。 堆焊材料可采用: 国产的 TN- 65或 TM-65 ; 德国的 UM10-65-G或 MF10-GF-60-G焊條; 或比利时高硬度堆焊焊条。 堆焊层 1 的硬度 HRC可达 70〜80, 冲击值 a k仍可符合 4〜6J/cm2的要求。 这样组合制作的管磨机新型 衬板内柔外刚, 刚柔并济, 这是一种理想的组合和匹配。 同时也是水泥工业 用管磨机研磨功能强化后最理想的衬板。
由于厚度减薄, 单位面积筒体表面 10 X 10cm=100cm2面积上衬板的重量 已从 5. 071^下降到 2. 11^, 下降了 2. 4倍。 因此本发明制作的衬板可以采用 固化物 5镶砌、 粘贴, 和用局部焊接的方式安装在磨筒体钢板 4内。 固化物 5 可以是高强度水泥砂浆、 或环氧树脂或无机胶黏剂等。 其中: 高强度水泥 砂浆(525水泥与细沙比为 1 : 1. 5〜2. 0,三天抗折强度可达 5. 5kg/cra2以上); E03、 E06号环氧树脂的不均勾扯离强度>
Figure imgf000005_0001
以及各种无机胶黏剂等 进行镶砌、 粘贴和局部焊接, 施工非常简单方便。 同时也节省了螺栓固定需 要在筒体上的钻孔。
2 ) 用非金属耐管磨机磨陶瓷衬板
其中, 陶瓷衬板 3的加工制作可以有两种方式:
其一是, 充分利用现有陶瓷厂 (如宜兴陶瓷厂) 的生产技术和设备, 我 们只要提供各种所需的条、 片、 块、 板尺寸及表面几何形状的图样, 然后陶 瓷厂按照图样重幵模具, 即可生产出我们所需的陶瓷衬板 3。
其二是, 原料按照刚玉陶瓷的成分配制。 刚玉陶瓷的成分是现有技术, 然后采用金属模具在 1500〜2000T压力机下压制成型。 直接送入高温炉内经 1600〜1800°C温度下焙烧, 1 小时左右出炉冷却直接制成是水泥工业管磨机 用耐磨陶瓷衬板 3。 尺寸大小可根据磨机不同规格具体确定, 厚度完全可以 控制在 30mm以内, 其尺寸可亦是 100 X 100 X 30mm, 200 X 200 X 30mm, 300 X 300 X 30醒等, 表面几何形状按照我们确定的波纹尺寸制作。
刚玉陶瓷的冲击值 a k不在 10J/cm2以下,并且刚玉陶瓷得天独厚的硬度 值是任何钢铁耐磨材料无法企及的, 其硬度值 HRC可达 85〜95。 锋利钢材的 硬度 HRC也只有 75〜80。
我们采用的刚玉衬板的化学成分如下(重量比):
α氧化铝粉: 85〜95%
氧化锆粉: 5〜15%
其性能如下:
抗压强度: 700~900kg/cm'
比 重: 3. 7〜3. 9
HRC 硬度: 85〜95
a k冲击值: 〉10J/cm2
由于刚玉陶瓷衬板 3的比重较轻, 只有铸造衬板 7. 9的 1/2, 因此, 筒 体表面 10 X 10cm=100cm2面积衬板的重量从 5. 07kg下降到 1. 17kg, 下降了 4. 3倍。 真可谓薄壁、 轻质、 高性能。 参见图 2, 其在磨筒体钢板 4 内的安 装更可以采用上述固化物 5镶砌、 粘贴, 和用局部焊接的方式。 施工非常方 便, 管磨机筒体可以无钻孔或少钻孔。
3 ) 延长新型堆悍衬板使用寿命的新方法
参见图 3, 本发明制作的新型堆焊衬板在磨筒体钢板 4内用固化物 5镶 砌、 粘贴和局部焊接安装时, 与磨筒体钢板 4内结合的凹凸空间里可以特别 衬置条、 片、 块形状不等的陶瓷衬板 3, 最佳方案是刚玉陶瓷衬板 3, 这种 非金属耐磨材料的硬度 HRC可高达 85〜95 以上。 即使在堆焊衬板完全磨损 后, 管磨机仍然能够正常工作相当长时间, 新型堆焊衬板的使用寿命得到进 一步强化和延长, 这是现行任何形式的衬板都无法做到的。
本发明的相关说明:
1 ) 现行衬板与本发明的区别:
迄今为止国内外水泥工业用管磨机的衬板制造都是用炼钢设备经配料、 熔炼, 并同时将衬板做出沙型或金属型, 然后浇铸、 出型、 热处理等工序铸 造出衬板。 这与本发明冲压成型、 表面堆焊的制作工艺有本质的区别, 与本 发明中非金属耐磨陶瓷衬板更有本质却别和差异。
2 ) 本发明的重要技术特征:
现行铸造衬板受钢铁冶炼和热处理的限制, 更重要的是受到材性中 HRC 硬度和 a k冲击值相互制约的作用。 因此, 铸造衬板的硬度在 HRC在 60的基 础上提高是相当困难的。 只有用铸造厚度弥补不足来保证使用周期寿命。
本发明摆脱了钢铁材料材性的束缚, 实现了内柔外刚、 其堆焊硬度可达 70〜80, 要想耐磨提高寿命必须首先提高材料的硬度。 刚玉陶瓷的性能更加 优异。 因此本发明使衬板的厚度降低 1倍, 使用寿命提高 1倍是最起码的效 果。
3 ) 现行铸造衬板的安装与本发明的区别:
由于现行铸造衬板的重量重, 特别是随着管磨机的大型化以后, 铸造衬 板的重量更重。 为了防止重大事故的发生, 在筒体内的安装只能采用在筒体 上打孔螺栓固定的方法进行安装, 筒体上的打孔总数高达 1600 余孔, 严重 削弱了磨筒体的刚度和强度。
而本发明的堆焊衬板和陶瓷衬板单位筒体面积的重量分别下降了 2. 4倍 和 4. 3倍, 完全可以安全的使用镶砌、 粘贴和局部焊接的方法, 真正让筒体 实现无钻孔和少钻孔。
4 ) 国内外现行铸造衬板在延长使用寿命方面的措施是无所作为的。 管 磨机在粉磨作业过程中衬板厚度残留接近 1/3时便别无选择只能拆除全部更 换。 这点与本发明是不可等量齐观的。
Figure imgf000007_0001
由于厚度、 比重的不同, 装机的总重量不等, 一次投资差异不大, 而使 用寿命差别是巨大的。
发明可达到的效果是:
1、 管磨机衬板由热加工铸造制作改为冷加工冲压成型后堆焊制作, 简 化了制造方法, 改善了热加工苦、 脏、 累, 劳动力密集的生产条件。 可实现 自动化操作。
2、 由于堆焊层优异的机械物理性能。 高硬度表面和高韧性基材, 在 "小 能量、多次重复冲击 "条件下工作完全是最佳匹配,使用寿命可在现有 7000〜 10000小时的基础上提高一倍, 达到 15000〜2000小时的水平。 3、 由于本发明衬板材料优良,其厚度在原有基础上减少了 50%, 以 Φ 3. 8 X 13m磨机为例, 衬板厚度可以从 65mm减薄到 30 35 可减轻重量达 50 吨以上, 节省钢材达 50%以上, 节省功率消耗约 300Kw左右。 而陶瓷衬板的 效果更远优于此数据。
4、 由于衬板重量减轻, 功耗节省, 按照勃兰克 (Blanc ) 公式计算, 研 磨体装填量可增加 24吨, 可使磨机产量提高 10 15%
5、 管磨机衬板轻质化后, 完全可以淘汰螺栓固定, 而采用水泥镶砌、 粘贴和局部焊接法, 这样可实现磨筒体无钻孔和少钻孔, 避免了筒体刚性和 强度的损伤, 提高了设备运行的可靠性, 避免强度和刚度的损伤达 20 30%
6、 衬板的安装只需要镶砌、 粘贴和局部焊接, 比原有螺栓紧固大大简 化了工作量, 同时也大大降低了劳动强度。
7、 刚玉陶瓷衬板在水泥工业推广应用将是革命性的, 各种经济指标都 将有重大突破。 真正能实现管磨机衬板使用十年不更换的时代已经到来。 钢 材节省的数量是十分可观的。 "以陶代钢" 无论是环保意义还是经济意义都 是不可估量的。 特别是在当经全球铁矿石价格持续飞涨的时代。

Claims

权 利 要 求 书
1、 一种水泥工业管磨机用新型衬板结构的制作方法, 其步骤是- 以普通中低碳钢钢板采用冷热模冲压成型出所需几何形状的衬板基材, 然后 在衬板基材表面堆焊出堆焊层, 制作成管磨机衬板; 将所述衬板安装在磨筒体内: 采用高强度水泥砂浆、 环氧树脂或各种无机胶黏剂等作为固化物, 将衬板镶砌、 粘贴, 以及用局部焊接的方式连接在磨筒体钢板内。
2、 一种水泥工业管磨机用新型衬板结构的制作方法, 所述衬板是两种类型的 陶瓷衬板, 其步骤分别是:
A、 利用现有陶瓷厂的生产技术和设备, 生产出各种所需尺寸的条、 片、 块和 板以及表面几何形状的图样所需的陶瓷衬板;
B、 陶瓷衬板的原料是按照刚玉陶瓷的成分配制, 然后采用金属模具在压力机 下压制成型, 送入高温炉内焙烧, 出炉冷却直接制成是水泥工业管磨机用耐磨陶 瓷衬板, 尺寸大小可根据磨机不同规格具体确定;
上述两种衬板在磨筒体内的安装固接的固化物可以用高强度水泥砂浆、 环氧 树脂或各种无机胶黏剂等固化物进行镶砌、 粘贴, 以及局部用焊接的方式连接在 磨筒体钢板内。
3、 一种水泥工业管磨机用新型衬板结构的制作方法, 其步骤是:
将权利要求 1所述的金属衬板与筒体结合的凹凸空间里衬置权利要求 2的条、 片、 块形状不等的刚玉陶瓷衬板, 形成组合式衬板; 然后将所述组合式衬板用所 述的固化物镶砌、 粘贴, 以及用局部悍接的方式安装在磨筒体钢板内。
4、 根据权利要求 1所述的制作方法, 其特征在于: 在成型的衬板基材表面堆 焊 5〜15mm厚的高硬度金属或金属一非金属复合材料的所述堆焊层。
5、 根据权利要求 2所述的制作方法, 其特征在于: 所述刚玉陶瓷原料采用重 量比为氧化铝粉: 85〜95%, 氧化锆粉: 5〜15%; 用金属模具在 1500〜2000T压力 机下压制成型, 直接送入高温炉内经 1600〜1800°C温度下焙烧, 1小时左右出炉 冷却直接制成是水泥工业管磨机用耐磨陶瓷衬板; 厚度控制在 30mm以内, 其尺寸 是 100 X 100 X 30mm, 200 X 200 X 30mm, 300 X 300 X 30mm等; 刚玉陶瓷的冲击值 α k > 10J/cm2 , 其硬度值 HRC达 85〜95。
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