CN104603294A - 用于从钢生产周期中产生的熔渣回收热量和烟雾的装置 - Google Patents
用于从钢生产周期中产生的熔渣回收热量和烟雾的装置 Download PDFInfo
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Abstract
本发明描述了一种用于从钢生产周期中产生的熔渣回收热量和烟雾的装置,该装置允许使用在冷却过程中由熔渣放出的热量,而无需将熔渣收集在矿车中,然后必须将这些矿车运送至冷却表面并倾卸,以便排出熔渣;同时,该装置允许传送并处理烟雾,并因此允许传送并处理在倾卸过程中和在处于冷却表面上的时间里由熔渣放出的热量和污染物。
Description
由于先前引入炉中的造渣剂(slagging agent)的添加,通过电炉或整体循环处理生产钢的炼钢厂和钢铁工业在钢液精炼阶段过程中会产生大量液体碱性熔渣(fluid basic slag)。由于较低比重的影响,该熔渣在钢水的熔池(bath)中分层,并且该熔渣通过在熔炼结束时进行的排渣操作被移除。排渣阶段包括将炉从相对侧倾斜到出渣(tapping)侧,以利于将熔渣倒入至矿车(tub)中。
收集铸件的熔渣的矿车定位在排渣孔处的地面上或手推车上。在铸造结束时,手推车由炉的操作人员人工操作,并在适当的轨道上滑动直至箱子附近(在此处,装载起重机的起重机操作人员可抬起矿车并将其排空),或者通过使用矿车倾卸车,从炉的下方抬起矿车,运载矿车并将矿车倾卸入冷却箱中。
在被收集并运载到存储区域之前,如果不是数天的话,熔渣也要保留在排渣箱中达数小时。
在每次铸造过程中,从炉中排出的熔渣的生产量在百分比上介于通过铸造过程处理的钢液的量的12%与16%之间:例如,每次铸造从250t钢的容量的炉中排出介于30与40公吨之间的熔渣的量。
熔渣被排出并被收集在矿车中,所述矿车通常被运载到炼钢厂外部的户外区域以用于在露天中冷却,并在某些情况下用水喷射来冷却。冷却的熔渣被运送到存储区域,然后进入后续处理阶段。
在所描述的过程中,包含在矿车中的熔渣具有约1100/1200℃的温度。因此,通过所描述的收集和冷却处理,大量的热量形式的能量被散布到空气中。
还必须考虑的是,在冷却过程中,熔渣释放不可忽略的量的污染物,且由本领域的专家进行的各种研究已经证明,熔渣的温度的快速降低可限制有害排放物。
多年来,已经开发出用于从钢处理过程中的熔渣回收热量的方法和装置,诸如,例如,在专利JP 55 132150 U、JP 53 14983和JP 54 139002 U中描述的那些。
一般情况下,通过以下方式在已知装置中回收熔渣的热量,即,将从炉中取出并容纳在矿车中的熔渣倾卸到一表面上,该表面进而将热量传递到其他装置,诸如,例如,水或空气在里面流动的管道,所述水或空气被加热并被重新使用。
用于从钢处理过程中的熔渣回收热量的已知系统具有限制扩散性和适应性的多个缺点,诸如,例如:
-通过矿车将高温熔渣从炉排放至冷却箱;该操作对于操作人员具有高度的风险,并且由于需要使用特定配备的装置来进行容器(pot)的运输和倾倒而具有相当大的成本。
-具有获得从矿车排放到冷却箱的熔渣的不太厚且足够均匀的表面的难度,其中冷却时间显著地增加且熔渣非均匀冷却;
-在转移到矿车中的过程中、当倒入冷却箱中时以及在与空气正常的热交换中,熔渣的相当大的量的热量分散;
-在冷却时间过程中,不可能或难以通过通道引导出由熔渣放出的烟雾(随后污染物质散布到空气中)。
本发明的第一个目的是回收由留在炉中的熔渣放出的热量以供后续使用,而不需要将熔渣收集在矿车中,然后必须将所述矿车运送到冷却表面并在那里倾倒以倾卸出熔渣;
本发明的第二个目的是传送和处理烟雾,并因此传送和处理在倾卸过程中和在处于冷却表面上的时间里由熔渣放出的热量和污染物;
本发明的第三个目的是提供一种用于回收生产钢的炉的熔渣的热量的系统,该系统允许处于排渣温度下的熔渣直接排到系统的冷却表面上;以这种方式,回收的热量处于最高温度下,并且熔渣在最高温度下以几乎液体状态被倾卸到冷却表面上并趋于以小的厚度均匀地沉积在整个表面上,从而保证了在非常短的时间内热量的快速冷却和最大回收。
根据本发明,这些目的通过由以下部件形成的装置来实现:
-熔渣平面,炽热熔渣落在该熔渣平面上,该熔渣平面相对于地面凸起,该熔渣平面包括基部,该基部通过壁在三个侧面上封闭,并通过倾斜前部元件联接至地面;基部和壁优选地由包括两个钢板的坚固钢板的夹层制成,两个钢板中的一个放置在另一个前面,这两个钢板由钢或其他类似材料制成,通过适当地成形元件隔开,以便在两个钢板之间的空间中形成一系列管道;两个钢板和/或由间隔件元件所产生的管道之间的空间允许流体(诸如,例如,由存在于基部上的炽热熔渣的热量加热的空气)的循环;
-两个隔离空气传送件,在存在于上述壁的侧面(位于内与外钢板之间)上的管道的出口处位于熔渣平面的右侧和左侧壁的上部边缘上方;管道中的一个是用于抽吸,而另一个是用于传递,且它们使用离心式风扇的推力协作以使管道中的空气或其他流体循环,从而增加对熔渣的热量的回收;
-抽吸罩,例如具有截棱锥形,位于熔渣平面的上方并邻近右、左和后壁,配备有能打开的前门和后部抽吸窗;罩的顶部配备有开口,该开口具有用于特定类型的炉的适当形状,并由顶板密封,以防止烟雾和热量的散布,通过所述开口,来自钢处理周期的熔渣被排放到熔渣平面的基部上;后部抽吸窗的出口与抽吸管连接,在所述抽吸管中,热烟雾被传送到下一个处理过程中,而不会散布到大气中,从而允许进一步的热回收;
-一个或多个水热交换器,位于罩的壁中(优选地位于侧壁上),通过所述水热交换器,由熔渣放出的热量以辐射的方式被回收,从而使水的温度突然升高并优化热量的回收。
根据本发明的装置(由上述部件形成)在排渣开口处以这样的方式定位在炼钢厂的炉的下方,该方式使得通过存在于罩的顶部中的开口使熔渣直接倒在熔渣平面的基部上;约1500℃温度的熔渣落在熔渣平面上并以均匀方式以基本上液体的形式分布在整个平面上。
由封闭的罩内部的熔渣放出的热量通过侧抽吸和传送管道来加热空气(在存在于熔渣平面的侧壁中的管道内循环),并加热水(在存在于罩的侧壁中的热交换器中循环)。烟雾抽吸管道防止分散到大气中,并允许进行具有减少污染和热量的明显优点的处理和冷却。
罩的能打开的前壁允许使用特定装置来移除冷却的熔渣。
在下文中参考附图,通过的实例的方式在非限制实施例中描述根据本发明的装置,在附图中:
-图1示出根据本发明的用于从钢生产周期中产生的熔渣回收热量的装置的轴测图;
-图2示出根据本发明的装置的平面图;
-图3示出根据本发明的装置的一些部分的截面的侧视图;
-图4示出根据本发明的装置的前视图;
-图5示出根据本发明的装置的示意侧视图。
参考上述附图,根据通过实例示出的非限制实施例的用于从钢生产周期中产生的熔渣回收热量的装置包括熔渣平面(1),熔渣(6)直接从炉中被放置在该熔渣平面上;熔渣平面(1)高于地平面并且在左侧和右侧上以及底部上通过壁(2、3、4)封闭,前侧通过倾斜平面(5)联接到地面,这允许机械装置移除冷熔渣;熔渣平面(1)包括两个钢板平面(7、8),这两个钢板平面中的一个位于另一个前面,彼此保持成整体且适当地间隔开约20cm,使用形成一系列管道的箱形元件或梁以用于通过由涡轮机(未示出)驱动的空气;右侧壁和左侧壁(2、3)采用熔渣平面(1)的相同构造技术,右侧壁和左侧壁由内钢板(9)和外钢板(10)制成,内钢板和外钢板通过形成一系列管道(11)的箱形元件或梁而保持约20cm的适当距离,所述管道与存在于熔渣平面(1)中的那些管道联接,并允许空气在熔渣平面(1)和壁(2、3)中循环。
右侧壁和左侧壁(2和3)的上表面(通气管道(11)在里面引出(leadout))与传送件(12和13)联接,一个传送件用于输送,优选地连接到未示出的涡轮机,且另一个传送件用于抽吸,加热的空气通过该传送件被传送以供后续使用。
熔渣平面(1)的钢板、侧壁(2、3、4)的钢板以及间隔件箱形元件或梁的钢板必须具有厚度和强度,以便承载倒在熔渣平面上的熔渣的重量以及将运送到熔渣平面上以用于在熔渣冷却时移除熔渣的装置的重量。
在熔渣平面(1)上方并在传送件(12和13)和通气管道(11)的出口的内部以及侧壁(2、3、4)内部的一侧上,具有封闭回路抽吸罩(14),该封闭回路抽吸罩(优选地具有截棱锥形)由轻量型钢结构制成且与外部绝热(insulate,绝缘)。
罩(14)配备有上部开口(18),该上部开口由顶板(ceiling)适当地密封,通过所述开口,约1500℃温度的熔渣(因此处于半液体状态)被直接从炉中排放到熔渣平面(1)上。
罩(14)配备有前门(15),该前门可打开以允许适于移除冷熔渣(6)的机械装置进入;在后侧的上部中,罩(14)配备有窗(16),该窗连接到管道(17),通过所述管道,由炽热的熔渣(6)放出的烟雾和热量被传送以便进行处理和冷却。
在罩的内壁上(优选地在侧壁上),具有一个或多个水热交换器(19和20),通过所述水热交换器,由熔渣(6)放出的热量以辐射的方式被回收,从而使水的温度快速升高,并因此优化热量回收,其可在以后使用。
如已经提到的,用于从钢生产周期中产生的熔渣回收热量的装置以这样的方式定位于炼钢厂的炉的正下方,该方式使得熔渣直接被排放在熔渣平面(1)上,约1500℃的热熔渣被均匀地放置在熔渣平面(1)上,从而避免产生厚层的熔渣,相反这会在倾卸到矿车中时发生,在所述矿车中,熔渣具有较低温度,其中冷却不均匀且也不快速,且热量的回收明显较差,从而使热量无法利用。
由封闭且绝热的罩(14)内部的熔渣(3)放出的热量加热在热交换器(19和20)中循环的水,并加热以被驱动的方式在管道(11)内部循环的空气,并且烟雾抽吸管道(17)防止热量和污染物散布到大气中。
罩的可自动打开的前壁(15)允许使用特定装置且在对操作人员不具有风险的情况下排出冷却熔渣(6),这不同于目前的情况,在该情况下,包含有约1000/1500℃温度的熔渣的矿车移动。
用于从钢生产周期中产生的熔渣回收热量的装置可被制成为尺寸适于必须使用该装置的炉,且平均尺寸可以是约12.5m的长度乘10.5m的宽度。
Claims (10)
1.一种用于从处理熔渣回收热量和烟雾的装置,其特征在于,所述装置能够与处理/生产系统相关联,所述装置从所述处理/生产系统接收炽热熔渣,所述装置包括:
-熔渣平面(1),所述炽热熔渣落在所述熔渣平面上,所述熔渣平面由侧壁界定,所述熔渣平面(1)和所述侧壁包括钢板(9和10),所述钢板以一个定位在另一个前面的方式定位,并且所述钢板通过间隔件元件彼此间隔开,所述间隔件元件能够在所述钢板(9和10)之间形成多个管道(11),空气通过所述多个管道循环;
-预定数量的空气隔离传送件(12和13),所述空气隔离传送件与至少一个侧壁在所述多个管道(11)的出口处相关联,所述空气隔离传送件中的至少一个将空气引入所述多个管道(11)中,并且至少一个所述空气隔离传送件从所述多个管道(11)抽吸空气,所述空气隔离传送件允许空气在所述多个管道(11)中循环,由存在于所述熔渣平面(1)上的所述炽热熔渣(6)放出的热量而对该空气进行加热,以及
-抽吸罩(14),所述抽吸罩位于所述熔渣平面(1)上方,所述抽吸罩(14)具有:前门(15),所述前门能打开;后部抽吸窗(16),与抽吸管道(17)连接;以及上部开口(18),所述炽热熔渣(6)通过所述上部开口被排放到所述熔渣平面(1)上。
2.根据权利要求1所述的装置,其特征在于,所述装置包括预定数量的水热交换器(19、20),所述水热交换器位于所述抽吸罩(14)的内壁上,以用于以辐射的方式回收由所述炽热熔渣(6)放出的热量。
3.根据权利要求2所述的装置,其特征在于,所述水热交换器(19、20)位于所述抽吸罩的内侧壁上。
4.根据权利要求1所述的装置,其特征在于,所述装置还包括用于热处理的装置,并且所述用于热处理的装置优选地用于冷却由所述炽热熔渣(6)产生且通过所述后部抽吸窗(16)从所述抽吸管道(17)吸入的烟雾。
5.根据权利要求1所述的装置,其特征在于,所述装置还包括用于处理和抑制包含在由所述炽热熔渣(6)产生的烟雾中的污染成分的装置。
6.根据权利要求1所述的装置,其特征在于,所述间隔件元件是箱形元件。
7.根据权利要求1所述的装置,其特征在于,所述间隔件元件是梁。
8.根据权利要求1所述的装置,其特征在于,所述间隔件元件是管状元件。
9.根据权利要求1所述的系统,其特征在于,所述抽吸罩(14)的壁是绝热的。
10.根据权利要求1所述的装置,其特征在于,所述抽吸罩(14)由轻量型钢结构制成。
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PCT/IB2013/054556 WO2013186664A1 (en) | 2012-06-15 | 2013-06-03 | Device for recovering heat and fumes from slag resulting from the steel production cycle |
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EA029360B1 (ru) | 2018-03-30 |
US20150159232A1 (en) | 2015-06-11 |
EA201492085A1 (ru) | 2015-04-30 |
JP2015528094A (ja) | 2015-09-24 |
BR112014031339A2 (pt) | 2017-06-27 |
US9663837B2 (en) | 2017-05-30 |
MA37652B1 (fr) | 2016-06-30 |
ITRM20120280A1 (it) | 2013-12-16 |
EP2861771B1 (en) | 2017-01-04 |
IN2014MN02510A (zh) | 2015-07-17 |
MX2014015299A (es) | 2015-07-06 |
SI2861771T1 (sl) | 2017-06-30 |
ES2621346T3 (es) | 2017-07-03 |
CN104603294B (zh) | 2016-08-24 |
JP6246801B2 (ja) | 2017-12-13 |
KR20150037817A (ko) | 2015-04-08 |
MX365535B (es) | 2019-06-06 |
MA20150359A1 (fr) | 2015-10-30 |
EP2861771A1 (en) | 2015-04-22 |
PL2861771T3 (pl) | 2017-07-31 |
WO2013186664A1 (en) | 2013-12-19 |
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