WO2007095831A1 - A rotary kiln - Google Patents

A rotary kiln Download PDF

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Publication number
WO2007095831A1
WO2007095831A1 PCT/CN2007/000326 CN2007000326W WO2007095831A1 WO 2007095831 A1 WO2007095831 A1 WO 2007095831A1 CN 2007000326 W CN2007000326 W CN 2007000326W WO 2007095831 A1 WO2007095831 A1 WO 2007095831A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary kiln
cylinder
anchor
refractory
brick
Prior art date
Application number
PCT/CN2007/000326
Other languages
English (en)
French (fr)
Inventor
Xinhua He
Saihui Wang
Wenhui Li
Zhiqing Ding
Deyi Ning
Weimin Shen
Fei Zhu
Dan Zhou
Original Assignee
ZhongYe Changtian International Engineering 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 ZhongYe Changtian International Engineering Co., Ltd filed Critical ZhongYe Changtian International Engineering Co., Ltd
Priority to BRPI0707020A priority Critical patent/BRPI0707020B1/pt
Priority to AU2007218923A priority patent/AU2007218923B2/en
Publication of WO2007095831A1 publication Critical patent/WO2007095831A1/zh

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/28—Arrangements of linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • F27D1/045—Bricks for lining cylindrical bodies, e.g. skids, tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/10—Monolithic linings; Supports therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings

Definitions

  • the invention belongs to a rotary kiln, and particularly relates to the improvement of the lining structure thereof, and is mainly applicable to roasting equipments such as metallurgy, chemical industry and building materials.
  • the wedge head has small head width difference, the brick and brick combination is poor, and the brick is easy to fall off; 2) The masonry has strict requirements on the dimensional tolerance of the brick; 3) The brick joint is difficult to construct and the construction period is difficult. Long; 4) With the extension of the running time, the wear of the bricks reaches a certain level, and it is easy to fall bricks and collapse accidents.
  • the second method uses a combination of prefabricated anchoring bricks and castables, namely a prefabricated anchoring brick, and a wrap.
  • This method also has the following deficiencies: 1) The prefabricated anchor brick is welded to the kiln shell by the inner reinforcement part, the casting belt is first welded with the anchor, and the post is poured. The prefabricated anchor brick is closer to the high temperature zone, and the heat transfer is closer. Large, the cylinder temperature is increased, and the heat loss is large. 2) The thermal expansion of the inner reinforcement in the prefabricated anchor brick is inconsistent with the expansion coefficient of the refractory material. The expansion of the reinforcement damages the precast block and affects the life of the precast block. 3) The production cycle is long, the production process is complicated, and the production cost is low.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art described above, and to provide a rotary kiln with a short manufacturing cycle, simple production, convenient construction, maintenance, maintenance, long service life and high thermal efficiency.
  • the rotary kiln of the present invention comprises a cylinder body, a heat insulation layer and a furnace lining, wherein the furnace lining is fixed on the cylinder body by the refractory bricks through anchors, and the installation position on the refractory bricks is consistent with the axial direction of the rotary kiln cylinder body.
  • Hook holes and hook concave surfaces are respectively formed on the joint surfaces.
  • One end of the anchor is provided with two hooks, respectively hooked into the hook holes of the adjacent two refractory bricks, and the other end of the anchor is a welded body, welded on the cylinder, and castable at the interface of the refractory brick in a circle Or interface brick seal.
  • the casting material is provided with anchoring nails welded to the cylinder body, and the four joint surfaces of the refractory bricks are provided with concave and convex meshing between bricks and bricks on two adjacent surfaces.
  • the wedge-shaped groove has a wedge-shaped flange on the other side.
  • the refractory brick is a rectangular parallelepiped or a rectangular parallelepiped having an isosceles trapezoidal cross section.
  • the heat insulation layer is a refractory fiber felt.
  • each brick and the rotary kiln cylinder are fixed by anchors, and the anchor of the fixed brick is higher than the high temperature zone.
  • the heat passing through the heat conduction is small, especially the heat insulation layer between the cylinder and the refractory brick is used to reduce the heat loss;
  • the refractory brick is made by mechanical pressing and then fired at a high temperature, and the refractory brick has high strength and long life.
  • the refractory brick has a short production cycle and low processing cost; the entire rotary kiln has less cast-in-place refractory lining, which reduces the difficulty of construction, overhaul and maintenance.
  • the four joint faces of the refractory brick are provided with wedge-shaped concave and convex groove edges, the meshing is tight and the integrity is good, the overall sealing performance of the lining is strengthened, and the probability of large damage of the lining due to the destruction of a small amount of refractory bricks is reduced.
  • the service life of the lining is extended, the service life of the entire rotary kiln is also increased, and the economic benefit is improved.
  • Figure 1 is a transverse cross-sectional view of the present invention
  • Figure 2 is a cross-sectional view taken along line A - A of Figure 1;
  • Figure 3 is a front view of the refractory brick
  • Figure 4 is a left side view of the refractory brick
  • Figure 5 is a front view of the anchor
  • Figure 6 is a left side view of the anchor
  • Figure 7 is a top view of the anchor.
  • the rotary kiln of the present invention comprises a cylinder 1, a heat insulating layer 2 and a furnace lining.
  • the lining is fixed to the cylinder 1 by the refractory brick 3 through the anchor 4, and the installation position on the refractory brick 3 is
  • the two joint faces of the rotary kiln cylinder having the same axial direction are respectively provided with a hook hole 31 and a hook concave surface 32 (see Fig. 3).
  • the anchor 4 is provided with two hooks 41 at one end thereof, respectively hooked into the hook holes 31 of the adjacent two refractory bricks, and the other end of the anchor 4 is a welded body 42 welded to the cylinder 1 Above, the joint of the refractory bricks 3 in a circumference is connected by a castable 5.
  • the casting compound 5 is provided with anchoring nails 6 welded to the cylinder 1.
  • the four joint faces of the refractory brick 3 are provided with wedge-shaped recesses 33 for engaging the concave and convex portions between the bricks and the bricks on the adjacent two faces, and wedge-shaped flanges 34 on the other two sides.
  • the refractory brick 3 is a rectangular parallelepiped having an isosceles trapezoidal cross section, and may also be a cube-shaped trapezoidal trapezoid.
  • the heat insulation layer 2 is a refractory fiber felt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Description

回转窑
技术领域
本发明属于一种回转窑， 具体涉及其炉衬结构改进， 主要适用于冶金、 化工、 建材 等焙烧设备中。
背景技术
现有回转窑的内衬砌筑基本上常用的方法有两种，一种是采用耐火砖通过错缝砌或 环缝砌筑的方法。 此法有以下不足： 1)楔形砖大小头宽差小， 砖与砖结合性差， 易掉 砖； 2)砌筑对砖的外形尺寸公差要求严格； 3)砖缝小施工难度大， 施工周期长； 4) 隨着运行时间的延长， 砖的磨损量达到一定程度， 就容易发生落砖和塌陷事故。第二种 方法用预制锚固砖和浇注料结合的方式， 即一条预制锚固砖， 一条绕注料。此法也有以 下不足： 1 )预制锚固砖是靠内配筋外伸部分与窑壳焊接在一起， 浇注带先焊锚固件， 后浇注， 预制锚固砖内配筋离高温区较近， 传热大， 使筒体温度增高， 散热损失大。 2) 预制锚固砖里的内配筋的热膨胀与耐火材料的膨胀系数不一致，筋膨胀对预制块造成伤 害， 影响预制块寿命； 3) 制作周期较长， 制作工艺较为复杂， 制作成本髙。
发明内容
本发明要解决的技术问题是克服上述现有技术存在的缺点，提供一种其炉衬制造周 期短， 生产简单， 施工、 检修、 维护方便， 使用寿命长， 热效率高的回转窑。
本发明的回转窑， 包括筒体、 隔热层和炉衬， 其特征在于所述炉衬由耐火砖通过锚 固件固定于筒体上，在耐火砖上安装位置与回转窑筒体轴线方向一致的二个结合面上分 别开有挂钩孔和挂钩凹面。锚固件一端设有二个挂钩， 分别钩入前述相邻两耐火砖的挂 钩孔内， 锚固件的另一端为焊接体， 焊在筒体上， 在一圆周内耐火砖的接口处用浇注料 或接口砖密封。
作为本发明的进一步改进， 所述浇注料内设有焊固于筒体上的锚固钉，所述耐火砖 上四个结合面上， 相邻二个面上设有砖与砖之间凹凸啮合的楔形凹槽， 另二面设有楔形 凸缘。 所述耐火砖为横断面为等腰梯形的长方体或正方体。 所述隔热层为耐火纤维毡。
本发明由于每块砖与回转窑筒体通过錨固件固定，而且固定砖的锚固件离高温区较 远， 这样通过热传导的热少， 特别是筒体与耐火砖之间填有隔热层， 减少散热损失； 耐 火砖制作是经过机压成形后， 在高温焙烧而成， 耐火砖强度高， 寿命长， 同时耐火砖生 产周期短， 加工成本低； 整个回转窑耐火内衬现浇少， 减少了施工， 检修， 维护难度。 另外， 由于耐火砖的四个结合面上设置有楔形凹凸槽缘， 啮合紧密、整体性好， 炉衬整 体密封性能得到了加强，减少了因为少量耐火砖被毁坏而导致炉衬大面积损坏的机率， 延长了炉衬的使用寿命， 也增加了整个回转窑的使用寿命， 经济效益得到提高。
附图说明
图 1为本发明的横向剖视图；
图 2为图 1的 A— A剖视图；
图 3为耐火砖的正视图；
图 4为耐火砖的左视图；
图 5为锚固件的主视图；
图 6为锚固体的左视图；
图 7为锚固件的俯视图。
具体实施方式
如图 1、 2所示， 本发明的回转窑， 包括筒体 1、 隔热层 2和炉衬， 炉衬由耐火砖 3 通过锚固件 4固定于筒体 1上，在耐火砖 3上安装位置与回转窑筒体轴线方向一致的二 个结合面上分别开有挂钩孔 31和挂钩凹面 32 (见图 3)。 参见图 5、 6、 7， 锚固件 4一 端设有二个挂钩 41， 分别钩入前述相邻两耐火砖的挂钩孔 31内， 锚固件 4的另一端为 焊接体 42， 焊在筒体 1上， 在一圆周内耐火砖 3的接口处用浇注料 5连接。 浇注料 5 内设有焊固于筒体 1上的锚固钉 6。
如图 3、 4所示， 耐火砖 3上四个结合面上， 相邻二个面上设有供砖与砖之间凹凸 啮合的楔形凹槽 33， 另二面设有楔形凸缘 34。耐火砖 3为横断面为等腰梯形的长方体， 也可为等腰梯形的正方体。 隔热层 2为耐火纤维毡。

Claims

权 利 要 求
1、 一种回转窑， 包括筒体（1 )、 隔热层（2)和炉衬， 其特征在于所述炉衬由耐火 砖（3)通过锚固件（4) 固定于筒体（1)上， 在耐火砖（3)上安装位置与回转窑筒体 轴线方向一致的二个结合面上分别开有挂钩孔（31)和挂钩凹面（32); 锚固件（4)一 端设有二个挂钩（41 )， 分别钩入前述相邻两耐火砖的挂钩孔（31 ) 内， 锚固件（4) 的 另一端为焊接体（42)， 焊在筒体 （1)上， 在一圆周内耐火砖 （3) 的接口处用浇注料
(5)或接口砖密封。
2、 根据权利要求 1所述的回转窑， 其特征在于所述绕注料（5) 内设有焊固于筒体 ( 1)上的锚固钉 （6)。
3、 根据权利要求 1或 2所述的回转窑， 其特征在于所述耐火砖（3)上四个结合面 上， 相邻二个面上设有供砖与砖之间凹凸啮合的楔形凹槽 （33)， 另二面设有楔形凸缘
(34)。
4、 根据权利要求 3所述的回转窑， 其特征在于所述耐火砖（3)为横断面为等腰梯 形的长方体或正方体。
5、 根据权利要求 4所述的回转窑， 其特征在于所述隔热层 （2) 为耐火纤维毡。
PCT/CN2007/000326 2006-02-22 2007-01-29 A rotary kiln WO2007095831A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0707020A BRPI0707020B1 (pt) 2006-02-22 2007-01-29 forno rotatório
AU2007218923A AU2007218923B2 (en) 2006-02-22 2007-01-29 A rotary kiln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2006100312579A CN100427867C (zh) 2006-02-22 2006-02-22 回转窑
CN200610031257.9 2006-02-22

Publications (1)

Publication Number Publication Date
WO2007095831A1 true WO2007095831A1 (en) 2007-08-30

Family

ID=36844367

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/000326 WO2007095831A1 (en) 2006-02-22 2007-01-29 A rotary kiln

Country Status (5)

Country Link
CN (1) CN100427867C (zh)
AU (1) AU2007218923B2 (zh)
BR (1) BRPI0707020B1 (zh)
UA (1) UA90051C2 (zh)
WO (1) WO2007095831A1 (zh)

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CN101666147B (zh) * 2008-09-05 2011-09-21 贵阳铝镁设计研究院有限公司 一种混砌炉墙的建筑方法
CN102313451A (zh) * 2010-07-07 2012-01-11 江苏省方通新型不锈钢制品股份有限公司 一种新型的电磁感应炉内衬结构
TWM414569U (en) * 2011-06-10 2011-10-21 Tai Wei Machine Co Ltd Flame retardant structure of inner wall of melting furnace
CN102840761B (zh) * 2012-09-21 2015-03-25 江苏朝阳液压机械集团有限公司 一种炉体耐火砌筑挂钩系统及悬挂方法
EP2784421B1 (de) * 2013-03-27 2016-02-03 Refractory Intellectual Property GmbH & Co. KG Wölbstein zylinderförmiger inneren Auskleidung eines Drehrohrofens und Drehrohrofen
CN103308019B (zh) * 2013-06-26 2016-08-17 中冶长天国际工程有限责任公司 一种回转窑炉衬剥落厚度检测方法及装置
CN103615884B (zh) * 2013-11-22 2016-02-03 中国五冶集团有限公司 回转窑砌筑方法
CN105716417B (zh) * 2014-12-01 2018-03-02 偏关县晋电化工有限责任公司 回转窑
RU169153U1 (ru) * 2015-12-22 2017-03-07 Евгений Вадимович Кравцов Реторта вращающейся печи
CN107576199A (zh) * 2017-10-01 2018-01-12 安徽芜湖海螺建筑安装工程有限责任公司 水泥回转窑系统中使用的筒体锚固件
CN107560424B (zh) * 2017-10-11 2024-01-30 上海宝冶冶金工程有限公司 一种石灰竖窑耐火内衬组合砖

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JPH09280738A (ja) * 1996-04-16 1997-10-31 Nippon Steel Corp ロータリーキルンの内張り耐火物施工方法
JPH11130485A (ja) * 1997-10-23 1999-05-18 Toshiba Ceramics Co Ltd セメントキルン用パネル及びその施工方法

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JPH09280738A (ja) * 1996-04-16 1997-10-31 Nippon Steel Corp ロータリーキルンの内張り耐火物施工方法
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Also Published As

Publication number Publication date
BRPI0707020A2 (pt) 2011-04-12
AU2007218923A1 (en) 2007-08-30
AU2007218923B2 (en) 2010-06-17
CN100427867C (zh) 2008-10-22
UA90051C2 (ru) 2010-03-25
BRPI0707020B1 (pt) 2017-05-09
CN1811312A (zh) 2006-08-02

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