钛矿护炉机理

tsgt001
tsgt001
一级 试用期

状态:未解决
查看次数:3131
类目:  炼铁问吧 >
悬赏: 15
发布时间:2015-08-19 14:33
离问题结束还有: -1461天-20小时-54分

含钛原料在高炉内的反应过程,如何形成防护层来降低炉缸侧壁温度高的

信息编号:583 ? 查看次数:3131 ?2015-08-19 14:33 发布人:tsgt001 一级 试用期 ?IP:222.134.216.50 ?
其它回答(5)
[Ti]与高炉炉缸
1、 TiO2还原的热力学条件
????????SiO2的还原是从高炉软熔带以下开始,经过滴下带到炉缸完成的。比较SiO2与的分解反应自由能变化
?????????????????????????????????????????????????△G°SiO2??=216500?–?42.0T???????????????????????????????????????????????????①
?????????????????????????????????????????????????△G°TiO2??=225500?–?42.8T???????????????????????????????????????????????????②
????????可以看出两个分解反应的熵几乎相等,只是TiO2分解所需的热要大一些,故TiO2较之SiO2更难还原。
????????根据钛氧化物还原的各级反应自由能计算,还原性气体(CO、H2)不能承担钛氧化物还原的任务。因此,钛氧化物的还原过程主要是在高温条件下有固体碳来实现的
???????????????????????????????????????????????TiO2+?3C===?TiC+?2CO??????????△G°??=120460?–?80.52T???????????③
???????????????????????????????????????????????TiO2+?2C+1/2N2===?TiN+?2CO???△G°??=84160?–?60.95T?????????④
????????两者反应的温度都在1100℃以上,当温度超过1581℃时,TiC的还原势能大。
????????综合以上,不难发现滴下带存在着TiO2还原的较为完备的热力学和动力学条件,接近风口燃烧温度的高温,炽热的焦炭粒提供了强还原性气氛,加之冶炼炼钢生铁过程中铁水的碳量在滴下过程中迅速增加,[C]达4%以上,也为钛氧化物的还原提供了还原剂,为还原产物的扩散提供了良好的条件。
高炉高度上的TiC、?TiN变化
高炉部位 TiC??% TiN??%
炉腹?????????1.03?? 0.56
风口平面 1.23 ????????0.80

2、 [Ti]与炉缸工作
????????不管TiC、?TiN的生成部位在何处,其最终都将随炉渣与铁液聚集到炉缸,对炉缸的工作产生影响。由于铁水中的钛大多是以TiC、?TiN的形式存在,它们的熔点分别是3150℃和2950℃,在铁水中以固体颗粒形式悬浮于铁液中,增加铁液粘稠度,降低铁水流动性,起到护炉作用。
???????[Ti]不仅半身起到使铁水粘稠的作用,还促进碳的石墨化,造成铁水粘稠更甚。[S]则相反,在高炉中起着阻止碳的石墨化的作用。
3、 风口喂钛精粉
????????当高炉炉缸局部出现水温差升高、耐火材料测点热电偶温度上升超过操作规程规定的要求时,我们必须高度重视。
3.1?加强水温差测量,增加测量频次;
3.2?对水温差高度部位冷却壁进行热流强度检测,热流强度大于30000kJ/(h?m2)就要高度重视,适当控制冶炼强度、增加该区域冷却壁的冷却强度(常压水该高压水)、热流强度大于40000kJ/(h?m2)高炉休风缩小该区域上方风口进风面积或堵风口操作;同时可以采用钛矿冶炼或钛精粉喂线护炉。经验是:当铁水中[Ti]大于0.150%以上时,铁水粘稠度增加,铁水中[Ti]大于0.200%以上时,可以起到保护炉缸的作用;当热流强度大于50000?kJ/(h?m2)时,高炉要密切关注该区域的变化,防止出现炉缸局部烧穿的事故发生。

???????????????????????????????????????????????????????????????????????????????????????????????????2015年8月20日

回复时间:2015-08-20 09:57 回答者:马铁人 马铁人 一级 试用期

钛能阻止碳的石墨化

回复时间:2015-12-07 15:45 回答者:钱多多 钱多多 一级 试用期

难熔,沉积于炉底

回复时间:2016-03-15 10:52 回答者:山丘 山丘 一级 试用期

[b][url=http://www.brightreplicawatches.com/es/]relojes?Hublot[/url][/b]
[b][url=http://www.brightreplicawatches.com/es/]?relojes?rolex?[/url][/b]
[b]relojes?Breitling[/b]

Rolex?Day-Date?118.209?Hombres?Blue?Automatic?Swiss?ETA?2836-2?-?€181.35?:?r茅plicas?de?relojes,?brightreplicawatches.com
??US?Dollar
??Euro
??GB?Pound
??Canadian?Dollar
??Australian?Dollar
??Jappen?Yen
??Norske?Krone
??Swedish?Krone
??Danish?Krone
??CNY
Productos
Hublot
[url=http://www.brightreplicawatches.com/es/tag-heuer-c-13.html]Tag?Heuer[/url]
Breitling
[url=http://www.brightreplicawatches.com/es/rolex-c-1.html]Rolex[/url]
[url=http://www.brightreplicawatches.com/es/rolex-aguas-profundas-c-1_7.html]Aguas?Profundas[/url]
[url=http://www.brightreplicawatches.com/es/rolex-daytona-c-1_3.html]Daytona[/url]
[url=http://www.brightreplicawatches.com/es/rolex-gmt-master-ii-c-1_6.html]GMT?-Master?II[/url]
[url=http://www.brightreplicawatches.com/es/rolex-milgauss-c-1_2.html]Milgauss[/url]
[url=http://www.brightreplicawatches.com/es/rolex-perpetua-c-1_4.html]Perpetua[/url]
[url=http://www.brightreplicawatches.com/es/rolex-submariner-c-1_5.html]Submariner[/url]
Destacado?-?[url=http://www.brightreplicawatches.com/es/featured_products.html]??[todos][/url]
[url=http://www.brightreplicawatches.com/es/tag-heuer-formula-1-cah1112ba0850-cuarzo-del-mens-roja-suiza-eta-cuarzo-p-443.html]Tag?Heuer?Formula?1?CAH1112.BA0850?cuarzo?del?Mens?Roja?Suiza?ETA?cuarzo[/url]€234.36??€178.56Ahorre:?24%?descuento[url=http://www.brightreplicawatches.com/es/rolex-daydate-118239-mens-negro-autom%C3%A1tico-suizo-eta-28362-p-71.html][img]http://www.brightreplicawatches.com/es/images/_small//replicawatches8201_/Rolex/Rolex-118239-Day-Date-Mens-Automatic-Black-Swiss.jpg[/img]Rolex?Day-Date?118.239?Mens?Negro?autom谩tico?suizo?ETA?2836-2[/url]
[url=http://www.brightreplicawatches.com/es/rolex-daydate-118239-mens-negro-autom%C3%A1tico-suizo-eta-28362-p-71.html]Rolex?Day-Date?118.239?Mens?Negro?autom谩tico?suizo?ETA?2836-2[/url]€254.82??€190.65Ahorre:?25%?descuento[url=http://www.brightreplicawatches.com/es/breitling-1884-suiza-7750-mens-autom%C3%A1tico-negro-dial-de-oro-rosa-p-202.html][img]http://www.brightreplicawatches.com/es/images/_small//replicawatches8201_/Breitling/Breitling-1884-Swiss-7750-Mens-Automatic-Black-91.jpg[/img]Breitling?1884?Suiza?7750?Mens?autom谩tico?Negro?Dial?de?oro?rosa[/url]Breitling?1884?Suiza?7750?Mens?autom谩tico?Negro?Dial?de?oro?rosa€263.19??€186.00Ahorre:?29%?descuento
????
??????[url=http://www.brightreplicawatches.com/es/]orte[/url]?::?
??[url=http://www.brightreplicawatches.com/es/rolex-c-1.html]Rolex[/url]?::?
Rolex?Day-Date?118.209?Hombres?Blue?Automatic?Swiss?ETA?2836-2
.jqzoom{
float:left;
position:relative;
padding:0px;
cursor:pointer;
width:301px;
height:300px;
}
?[url=http://www.brightreplicawatches.com/es/rolex-daydate-118209-hombres-blue-automatic-swiss-eta-28362-p-67.html][img]http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss.jpg[/img]Rolex?Day-Date?118.209?Hombres?Blue?Automatic?Swiss?ETA?2836-2[/url]
Rolex?Day-Date?118.209?Hombres?Blue?Automatic?Swiss?ETA?2836-2
€268.77??€181.35Ahorre:?33%?descuento
??????????????????
????A帽adir?al?carro:???????????
??
?
????????Description[/b]?
Marca:?Rolex
Serie:?Rolex?Day-Date
G茅nero:?Hombres
N煤mero?de?modelo?:?118209
Movimiento:?Autom谩tico
Material?de?la?Caja?:?acero?inoxidable?316L
Di谩metro:?36?mm
Pulsera?Material:?acero?inoxidable?316L
Dial?de?color?:?Azul
Cristal:?Cristal?de?zafiro
Valoraci贸n?:?1?:?1?AAA?Relojes?de?Calidad
[url=http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss.jpg][img]http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss.jpg[/img]/replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss.jpg[/url]
[url=http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss-1.jpg][img]http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss-1.jpg[/img]/replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss-1.jpg[/url]
[url=http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss-1.jpg][img]http://www.brightreplicawatches.com/es/images//replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss-1.jpg[/img]/replicawatches8201_/Rolex/Rolex-118209-Day-Date-Mens-Automatic-Blue-Swiss-1.jpg[/url]
Related?Products
[url=http://www.brightreplicawatches.com/es/rolex-218238-a-83218-datejust-autom%C3%A1tico-blanco-suizo-eta-2824-p-110.html][img]http://www.brightreplicawatches.com/es/images/_small//replicawatches8201_/Rolex/Rolex-218238-83218-Datejust-Mens-Automatic-White.jpg[/img]Rolex?218.238?a?83.218?Datejust?Autom谩tico?Blanco?Suizo?ETA?2824[/url]
[url=http://www.brightreplicawatches.com/es/rolex-218238-a-83218-datejust-autom%C3%A1tico-blanco-suizo-eta-2824-p-110.html]Rolex?218.238?a?83.218?Datejust?Autom谩tico?Blanco?Suizo?ETA?2824[/url]
[url=http://www.brightreplicawatches.com/es/rolex-yachtmaster-116622-mens-autom%C3%A1tico-del-acero-inoxidable-azul-suizo-eta-2824-p-169.html][img]http://www.brightreplicawatches.com/es/images/_small//replicawatches8201_/Rolex/Rolex-Yacht-Master-116622-Mens-Automatic.jpg[/img]Rolex?Yacht-Master?116622?Mens?autom谩tico?del?acero?inoxidable?Azul?suizo?ETA?2824[/url]
[url=http://www.brightreplicawatches.com/es/rolex-yachtmaster-116622-mens-autom%C3%A1tico-del-acero-inoxidable-azul-suizo-eta-2824-p-169.html]Rolex?Yacht-Master?116622?Mens?autom谩tico?del?acero?inoxidable?Azul?suizo?ETA?2824[/url]
[url=http://www.brightreplicawatches.com/es/rolex-submariner-suiza-2824-autom%C3%A1tico-negro-dial-palo-dot-marcadores-p-159.html][img]http://www.brightreplicawatches.com/es/images/_small//replicawatches8201_/Rolex/Rolex-Submariner-Swiss-2824-Automatic-Black-Dial.jpg[/img]Rolex?Submariner?Suiza?2824?Autom谩tico?Negro?Dial?Palo?Dot?Marcadores[/url]
[url=http://www.brightreplicawatches.com/es/rolex-submariner-suiza-2824-autom%C3%A1tico-negro-dial-palo-dot-marcadores-p-159.html]Rolex?Submariner?Suiza?2824?Autom谩tico?Negro?Dial?Palo?Dot?Marcadores[/url]
[url=http://www.brightreplicawatches.com/es/rolex-daydate-218238-a-83218-eta-mens-automatic-gold-swiss-28362-p-109.html]Rolex?Day-Date?218.238?a?83.218?ETA?Mens?Automatic?Gold?Swiss?2836-2[/url]
?
[url=http://www.brightreplicawatches.com/es/index.php?main_page=product_reviews_write&products_id=67][img]http://www.brightreplicawatches.com/es/includes/templates/polo/buttons/spanish/button_write_review.gif[/img]Escribir?comentario[/url]
??
?
????????
????????[url=http://www.brightreplicawatches.com/es/index.php]Home[/url]
????????[url=http://www.brightreplicawatches.com/es/index.php?main_page=shippinginfo]Shipping[/url]
????????[url=http://www.brightreplicawatches.com/es/index.php?main_page=Payment_Methods]Wholesale[/url]
????????[url=http://www.brightreplicawatches.com/es/index.php?main_page=shippinginfo]Order?Tracking[/url]
????????[url=http://www.brightreplicawatches.com/es/index.php?main_page=Coupons]Coupons[/url]
????????[url=http://www.brightreplicawatches.com/es/index.php?main_page=Payment_Methods]Payment?Methods[/url]
????????[url=http://www.brightreplicawatches.com/es/index.php?main_page=contact_us]Contact?Us[/url]??????


?
????????[url=http://www.topperfectwatches.com/]REPLICA?OMEGA[/url]
????????[url=http://www.topperfectwatches.com/]REPLICA?PATEK?PHILIPPE?[/url]
????????[url=http://www.topperfectwatches.com/]REPLICA?ROLEX[/url]
????????REPLICA?CARTIER
????????[url=http://www.topperfectwatches.com/]REPLICA?BREITLING?[/url]

?[url=http://www.brightreplicawatches.com/es/rolex-daydate-118209-hombres-blue-automatic-swiss-eta-28362-p-67.html][/url]?
Copyright?漏?2012-2014?All?Rights?Reserved.?
[b][url=http://www.brightreplicawatches.com/es/]Hublot?r茅plica?relojes[/url][/b]
[b][url=http://www.brightreplicawatches.com/es/]?r茅plica?relojes?cartier?[/url][/b]


[url=http://FakeCartierMensWatches7732.webs.com]??Blue??blog?[/url]

[url=http://Monsterbeatsbydrdreoutletonline6.webs.com]?Heuer??[/url]

[url=http://thenorthfaceoutlet770.webs.com]?About?brightreplicawatches.com?blog?[/url]

回复时间:2018-03-14 12:48 匿名回复

[b][url=http://es.columbiaoutdooronlinesale.top/]Columbia?Sportswear[/url][/b]?|?[b][url=http://es.columbiaoutdooronlinesale.top/]Columbia?Sportswear[/url][/b]?|?[b][url=http://www.columbiaoutdooronlinesale.top/es/]Columbia?Sportswear[/url][/b]
[b][url=http://es.columbiaoutdooronlinesale.top/]Columbia?Sportswear[/url][/b]?|?[b][url=http://es.columbiaoutdooronlinesale.top/]Columbia?Sportswear[/url][/b]?|?[b][url=http://www.columbiaoutdooronlinesale.top/es/]Columbia?Sportswear[/url][/b]
[b][url=http://es.columbiaoutdooronlinesale.top/]chaquetas?columbia[/url][/b]
[b][url=http://www.columbiaoutdooronlinesale.top/es/]chaquetas?columbia[/url][/b]


[url=http://cheapwatchessale3.webs.com]??Sportswear??blog?[/url]

[url=http://northfacejackets10.webs.com]?Sportswear??[/url]

[url=http://monclerbootsformen61.webs.com]?About?christianlouboutinshoeoutlet.top?blog?[/url]

回复时间:2018-04-04 08:14 匿名回复

我要回答 (回答字数请控制在10000字以内)

回答即可得2分,回答被采纳则获得悬赏分以及奖励10分,回答字数在10000字以内。
匿名设定: 剩余字数: