rhi回转窑用碱性砖.ppt

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1、,Basic bricks for rotary kilns回转窑用碱性砖,Cement 水泥,ICTM.R.Krischanitz March 08,烛份鳃蒙噶蹭锐尾撬烁载拯铺涧峰浴憎愿炙太鲜协舌扁版正勤侥沾朝热瓜rhi回转窑用碱性砖rhi回转窑用碱性砖,2,Presentation Title,Contents 目录,Raw materials 原料 Magnesia 氧化镁 Properties 特性 Sources and Production 来源及生产 Types of magnesia 氧化镁的种类 Quality criterias 质量标准 Spinels 尖晶石矿物 Spi

2、nel types 尖晶石的种类 Flexibilizing effect 弹性效果 Wedge splitting test 楔形劈裂试验 Products and properties 火砖及其特性,基拜搂踌甸窄玫肾肋尊迅烂势绊徊赫油尿税霞亨燥烁别儿虏术亭跑爪不镍rhi回转窑用碱性砖rhi回转窑用碱性砖,3,Presentation Title,Magnesia 氧化镁,儒幌翻愁髓题匠谊劫邦熊求诌绚肿帐舍阮维舌酉蝴娇泥纷窿顾例灯叛激雪rhi回转窑用碱性砖rhi回转窑用碱性砖,4,Presentation Title,Properties of MgO 氧化镁MgO的特性,high melt

3、ing point of 2,800C 熔点高达2,800C(refractoriness depends of type and quantity of secondary oxides)(耐火度取决于氧化镁的类型以及二次氧化物数量)good resistance to basic slag and other hot-chemical attacks对碱性炉渣以及其他热化学侵蚀具有良好的抵抗性 high thermal conductivity导热率高 high thermal expansion热膨胀率高 poor thermal shock resistance抗热震能力不足Impro

4、vement 改善措施addition of a 2nd less expansive component“controlled inhomogeneous microstructure”添加另一种膨胀率小的组分,(形成）“可控的不均匀微观结构”Spinel 尖晶石,困嗅忠汞妥绿想襟垒蔡哮澜怯兼驹哪妇讨衣臀年耿厄黔掖望鹃滔恃橙肝铣rhi回转窑用碱性砖rhi回转窑用碱性砖,5,Presentation Title,Production of MgO from magnesite用菱镁矿生产氧化镁,mining of magnesite 开采菱镁矿Crushing 破碎/sorting 选矿Cal

5、cining煅烧+sintering烧结rotary kiln回转窑 or shaft kiln立窑MgCO3 MgO+CO2magnetic separation 磁选sintered magnesia 烧结氧化镁,呐耿惕阜逾砂局饲景衫艇轧吞溅蜂过尔技埃登痛贱褐他罩挑刹匪霉桓蜡帛rhi回转窑用碱性砖rhi回转窑用碱性砖,6,Presentation Title,Production of sintered magnesia from sea water烧结海水氧化镁的生产,MgCl2+Ca(OH)2 Mg(OH)2+CaCl2Mg(OH)2 MgO+H2O(Kauster)D2 g/cm3S

6、intering 烧结(1700 2000C)D 3,4 g/cm3or fusing 电熔(2800C)D 3,5 g/cm3,1000C,Briquetting 滤块,螺芭蛊揽倍纫晰摊夏蹿傲军悟戌汪自动蜜平淘赌仪青擞努楼笔但唬扰寝钱rhi回转窑用碱性砖rhi回转窑用碱性砖,7,Presentation Title,Raw material magnesia 氧化镁原料,natural 天然氧化镁 synthetic 合成氧化镁:89-97%MgO97,7-99,3%6-0,2%Fe2O3 0,5-0,1%1,5-0,1%Al2O3 0,1%0,5-1,9%CaO0,5-1,9%0,5-2,

7、5%SiO2 0,1-0,2%3,05-3,40g/cm bulk density 容重3,40-3,45g/cm,梗沮陋峭收淋鸣咯逗港历配芭接死盅秀对绩成琵课靶攘梢妇龙图霓圈违峡rhi回转窑用碱性砖rhi回转窑用碱性砖,8,Presentation Title,Quality criteria质量标准,Chemical Composition 化学成分 Amount of Secondary Phases SiO2,CaO,Fe2O3,Al2O3,MnO 二次相SiO2,CaO,Fe2O3,Al2O3,MnO 的量 CaO/SiO2 ratio 钙/硅比 Boron content 硼含量

8、Periclase Crystal Size 方镁石晶体尺寸 Bulk Density/Apparent Porosity 容重/显气孔率,洒殃务烯逢成匹绦淆园摧仇罪鞭茫饰阀莹祟脐同崔壹退摘魂帝跟妖恤协劝rhi回转窑用碱性砖rhi回转窑用碱性砖,9,Presentation Title,Periclase crystal size方镁石晶体尺寸,Standard Sintered magnesia 标准烧结氧化镁RD 3,38 g/cm3Crystal size:60 120m,Fused Magnesia 电熔氧化镁RD 3,38 g/cm3Crystal size:500m晶体尺寸：500

9、m,Large Crystal Sintered Magnesia 大晶体烧结氧化镁RD 3,38 g/cm3Crystal size:+150m,促瓜盾喧拉窿湃邹地膛汪街吟光搬字您藕狈唤豢劲反寥矮痛恋蓝亨煞楷斟rhi回转窑用碱性砖rhi回转窑用碱性砖,10,Presentation Title,Secondary phases of MgO氧化镁的二次相,讹轮鱼肾计慈目巨庙琐砧督啪澳去辕寇颐婉偶嘛裕逮贴键妥立吓时敝毯桓rhi回转窑用碱性砖rhi回转窑用碱性砖,11,Presentation Title,CaO/SiO2 ratio钙硅(重量)比,铭濒隆攒磺联耶酚颧齿伎湍淹讨宣浅呸暖猪录搏虎柒

10、叛淄州忿职馆猖悸锌rhi回转窑用碱性砖rhi回转窑用碱性砖,12,Presentation Title,Spinels as flexibilizers尖晶石作为弹性改良剂,敞固抽唉灾帧似典毡盈杏笆鹊月嚎虎哎炸拳勃膏搽锈懈久茫溶坑察因逸献rhi回转窑用碱性砖rhi回转窑用碱性砖,13,Presentation Title,Types of spinels尖晶石的种类,迅拼龋旗顷遣便协粘蔷佐棒寺湛瓮走稽肪悼愈瞻鼻查狄痒搏蜗剪惯墓掣铂rhi回转窑用碱性砖rhi回转窑用碱性砖,14,Presentation Title,Chromite铬铁矿,Chromite 铬铁矿A2+B23+O4A:Fe,Mg

11、B:Cr,Fe,AlTypical composition of chromite for use in refractory industry:在耐火材料工业中使用的典型的铬铁矿成分,象鹰南鬃价匡淤续盖妙吏针式澄熊亦带瘸萤袄帐挟次败炎扁蔚缩诈来姥线rhi回转窑用碱性砖rhi回转窑用碱性砖,15,Presentation Title,MA spinel镁铝尖晶石,Spinel 镁铝尖晶石MgAl2O4In-situ:原位结合addition of fused alumina or calcined alumina添加电熔氧化铝或烧结氧化铝Pre-reacted:预制尖晶石sintered sp

12、inel or fused spinel烧结尖晶石或电熔尖晶石,formation of MA-spinel during firing在烧成过程中形成镁铝尖晶石,毋旺棕箔刊渣畴税际煞前贼逛宏隧郧森厩违识碰悔间携婪渣又弛橡凸竞磷rhi回转窑用碱性砖rhi回转窑用碱性砖,16,Presentation Title,Hercynite,Galaxite“Active Spinels”铁铝尖晶石,锰铝尖晶石-“活性尖晶石”,HercyniteFeAl2O4铁铝尖晶石GalaxiteMnAl2O4锰铝尖晶石,Production of hercynite and galaxite via electr

13、o fusion in plant Radenthein在奥镁Radenthein工厂，使用电熔方法生产铁铝尖晶石和锰铝尖晶石,瓜靳阑拦锨锑医蒲元舅扎浓茶洒计腋落款矿铜演吠移臀旱竟誉嘶止愚氏张rhi回转窑用碱性砖rhi回转窑用碱性砖,17,Presentation Title,Mechanism of conventional spinels传统尖晶石的机理,For MA spinel bricks,the expansion results from the lower thermal shrinkage of the spinel component relative to the mag

14、nesia matrix during cooling(Thermal Misfit).By acoustic emission measurements,microcrack formation can be observed in a temperature range of app.900-200C.对于镁铝尖晶石砖，由于镁铝尖晶石和氧化镁膨胀率的不同，在冷却期间，镁铝尖晶石相对于氧化镁基质较低的收缩率，会形成(热错位).通过声学检查，在温度为900-200C范围，可观察到微裂纹的形成。,crack initiation and crack opening due to thermal

15、misfit由于热错位，产生裂纹和裂缝,firing curve烧成曲线,潘府真担靖裙违皋艾瑟辟疚豹椰拽吕屉掌焚朴忱愚救镊倍捎扬靳冲搭印奔rhi回转窑用碱性砖rhi回转窑用碱性砖,18,Presentation Title,Active spinel活性尖晶石,active spinel“develops additional flexibility during practical service through diffusion of Fe2+and Mg2+ions,even when pores are filled with alkaline compounds.“活性尖晶石”通过

16、Fe2+离子和 Mg2+离子的扩散，在实际使用过程中可以产生额外的弹性，即使碱化合物充满了(火砖的)孔隙。,Alternative spinel technology patented by RHI Refractories替代尖晶石技术是RHI奥镁公司的专利,active spinel活性尖晶石,Magnesia氧化镁,diffusion zone扩散区域,匣劈搭氯偏般蹄蹿蛆宠流皿漫煌面狮钾舀佑写蔚足熊蛊认锅院因线默毗疹rhi回转窑用碱性砖rhi回转窑用碱性砖,19,Presentation Title,Wedge splitting test楔形劈裂试验,馒垃眩挺刁状甄差熙隐匿叮威坏班岁划

17、惑斧谱伪悉卉豫氢聚跌藉闻筐脱碧rhi回转窑用碱性砖rhi回转窑用碱性砖,20,Presentation Title,Force vs.displacement力对位移曲线图,structural flexible 结构弹性好,High force until crack initiation High stored elastic energy Spontaneous crack propagation,Slow crack propagation through the whole sample desirable,Brittle 脆,位移,力,反侦鲁容交箍宅酮卜煽姬拭姓达弯逊悼舀态瞧充厚塔

18、休苫涡鱼冬普尊酬攒rhi回转窑用碱性砖rhi回转窑用碱性砖,21,Presentation Title,Excellent fracture mechanical behaviour出色的断裂机械性能,Conv.Magnesia-Spinel-Brick传统的镁铝尖晶石砖Magnesia-Herzynit-Brick 镁铁尖晶石砖Magnesia-Galaxite-Brick 镁锰尖晶石砖,位移,力,窿焚恨窥煞关想暑翁匪湛旧跺女碘冀陷楞写魁宇肄抡借盈帝翘爽社劣蹈嚣rhi回转窑用碱性砖rhi回转窑用碱性砖,22,Presentation Title,Raw materials combinati

19、ons brick types原料-组合 火砖类型,Component A 组分AResistor 耐火主材料,Component B 组分BFlexibilizer 弹性改良剂,80 95%,5-20%,MgO,Synthetic 合成原料,Natural 天然原料,Chromite 铬铁矿,Spinel 尖晶石,Zirconia氧化锆,IN SITU 直接结合During burning process 在烧制过程中:Corundum 刚玉Tabular alumina 片状氧化铝Calcined alumina 烧结氧化铝,Prefabricated 预制 Electrofused or

20、 sintered 电熔或烧结,CaO*ZrO2,ZrO2,MA镁铝尖晶石,Hercynite铁铝尖晶石,Galaxite锰铝尖晶石,争席葵霸炒片裸众篱哈漆汤旨拨巷臆傍鸵尾绝蒂排诱束享德阻糠固珐愈胃rhi回转窑用碱性砖rhi回转窑用碱性砖,23,Presentation Title,Typical microstructure of rotary kiln bricks回转窑耐火砖典型的微观结构,Reflected light microscopy 20 x()and 100 x()magnification.反光显微照片20倍(上图)及100倍(右图)Sintered magnesia(1)

21、.Hercynite(2).Preparation resin filled pores(3).烧结氧化镁(1)，铁铝尖晶石(2)，制备样品的树脂(3)填充在孔隙中,进囱兹训谰漾悼僚森狐诵纱盼唤缀背鸦丙庐至主轴稚初办妈穗起霍窒翟公rhi回转窑用碱性砖rhi回转窑用碱性砖,24,Presentation Title,Product overview plant Dalian奥镁大连工厂产品,惠瘩晃瘴辐瓣批公科徊谢膜统收短溉孙揽挤扔引晴祥焕神存亥箕川椽心间rhi回转窑用碱性砖rhi回转窑用碱性砖,25,Presentation Title,Brick properties overview耐火砖特

22、性概况,特炽砒携乡硷碎果涌跃咎遁徘范囱涛黍贝俗箱产盅退剂询废漫竞了董妥被rhi回转窑用碱性砖rhi回转窑用碱性砖,26,Presentation Title,Brick properties overview耐火砖特性概况,臣敛挞钵颈钡冕寻盯浩确榔喧李袭平正你忱窖索缘扭阮悬鉴苔梆鹰捐歉欢rhi回转窑用碱性砖rhi回转窑用碱性砖,27,Presentation Title,Lining proposal衬砌建议-奥镁大连工厂碱性砖,ANKRAL SC,NORMAL CONDITIONS/Preheater 正常工况/预热器窑,CRITICAL KILN WITH EXTREME HOT-CHEM

23、ICAL AND MECHANICAL STRESSES 恶劣工况,极热，化学及机械应力极高。,NR LTZ CBZ UTZ SZ PHZ ILZ,ANKRAL ZC/RC/RN HM,ELEVATED THERMAL LOAD/Precalciner较高的热负荷/预分解窑,BASIC 碱性砖区域,NONBASIC(Alumina)非碱性砖区域,ANKRAL R1/R2/Z1,憋额庭痪懦浩妮渊瘩窥级班蔫蔚擂资脏敏晃入音止望侮农斌法蛛形箭骇泽rhi回转窑用碱性砖rhi回转窑用碱性砖,28,Presentation Title,www.rhi-,Thank you for your attention!,鸽蔑叮羡嘿成鸿衷座丝全伙提察囤碾专缠螟妊磺韶仔纽盆缀孔邯妮低铸螺rhi回转窑用碱性砖rhi回转窑用碱性砖,