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1. 发明授权

KR100584745B1 일반탄 및 분철광석을 이용한 용철제조공정에 있어서함철더스트 및 슬러지 재활용 장치 및 방법 有权
标题翻译：一种使用煤和精细矿石回收含铁和硫化铁冶炼工艺的装置和方法
公开(公告)号：KR100584745B1
公开(公告)日：2006-05-30
申请号：KR1020010082315
申请日：2001-12-21
申请人： 주식회사 포스코 , 재단법인 포항산업과학연구원
发明人： 김행구 , 강흥원 , 정선광 , 최낙준
IPC分类号： C21B13/00
CPC分类号： C21B13/002 , C21B13/0033 , C21B13/0073 , C21B13/023 , C21B13/14 , C21B2100/44 , C22B1/2406 , C22B5/16 , C22B19/30 , Y02P10/136 , Y02P10/214 , Y02P10/216 , Y02P10/232
摘要： 본 발명은 탈수, 건조 및 파쇄처리된 더스트/슬러지, 바인더, 미분광을 각각 저장하여 정량적출하는 복수개의 원료장입빈(110a)(110b)(110c);상기 원료 장입빈으로부터 공급되는 더스트/슬러지, 바인더, 미분광등을 일정량으로 혼합하고 교반하는 혼합교반기(100);상기 혼합교반기(100)로부터 혼합원료를 공급받아 일정입도의 펠렛으로 조립화하는 펠렛타이저(90);상기 펠렛타이저(90)로부터 제조된 펠렛을 건조하는 건조기(80);상기 건조기(80)에서 건조되어 장입되는 펠렛에 함유된 아연성분을 환원가스로서 기화시킬수 있도록 제5가스도관(44)을 매개로 상기 용융가스화로(40)와 연통되고, 기화된 아연성분을 배가스와 더불어 배기하는 제 6가스 도관 (71)을 상부에 갖추며, 환원가스에 의해 환원된 환원철 펠렛을 외부로 배출하도록 스크류피더(72)를 장착한 샤프트형 환원로(70);상기 스크류피더(72)에서 배출되는 환원철 펠렛을 소립과 대립으로 선별하여 상기 용융가스화로(40)와 분환원철 성형기(50)에 선택적으로 공급하도록 제 5,6광석도관(61)(62)을 갖는 고온밀페형 스크린(60)을 포함하여, 아연성분은 기화시켜 회수하고, 철성분은 환원시킨후 용선으로 회수하여 슬러지처리비용을 절감하고, 환경오염을 방지할수 있는 효과가 얻어진다.
원료장입빈, 혼합기, 펠렛타이저, 샤프트형 환원로, 스크린

2. 发明公开

KR1020040057183A 제강슬래그를 이용한 오폐수중 인 제거방법 有权
标题翻译：使用钢铁渣在废水中去除磷的方法
公开(公告)号：KR1020040057183A
公开(公告)日：2004-07-02
申请号：KR1020020083640
申请日：2002-12-24
申请人： 주식회사 포스코 , 재단법인 포항산업과학연구원
发明人： 정선광 , 김행구 , 최낙준 , 강흥원
IPC分类号： C02F1/52
摘要： PURPOSE: A method for removing phosphorous in wastewater using steelmaking slag is provided to remove phosphorous contained in wastewater by using steelmaking slag that is a byproduct generated from an ironworks. CONSTITUTION: The method comprises a step of obtaining yard slab by water cooling steelmaking slag; injecting 2 to 10 wt.% of yard slag having a basicity (CaO/SiO2) of 4.0 to 5.0 and containing 10 to 15 wt.% of FeO into wastewater containing phosphorous, thereby reacting the yard slag with wastewater at least for one hour; and a step of recovering the slag from the wastewater, wherein the yard slag is crushed so that it has an irregular grain shape, and wherein the yard slag is injected into the wastewater as a calcined slag by calcination treating the yard slag at an air atmosphere in the temperature range of 700 to 800 deg.C for at least one hour.
摘要翻译：目的：使用钢铁渣除去废水中的磷的方法，通过使用炼铁厂生产的副产品钢铁渣除去废水中含有的磷。构成：该方法包括通过水冷炼钢渣获得场地板的步骤; 将含有碱度（CaO / SiO 2）为4.0〜5.0，含有10〜15重量％的FeO的2〜10重量％的炉渣注入含磷的废水中，至少将炉渣与废水反应1小时。以及从废水回收炉渣的步骤，其中炉渣被粉碎，使其具有不规则的颗粒形状，并且其中炉渣通过在空气气氛下煅烧炉渣进行煅烧而作为煅烧炉渣注入废水中在700至800摄氏度的温度范围内至少1小时。

3. 发明公开

KR1020040056268A 환원로와 전기로를 이용한 복합형 제강장치 및 방법 有权
标题翻译：混合式炼钢装置和使用还原炉和电炉的方法
公开(公告)号：KR1020040056268A
公开(公告)日：2004-06-30
申请号：KR1020020082847
申请日：2002-12-23
申请人： 주식회사 포스코 , 재단법인 포항산업과학연구원
发明人： 김행구 , 정선광 , 최낙준
IPC分类号： C21B13/00 , C21B13/12
CPC分类号： Y02P10/212
摘要： PURPOSE: Hybrid steelmaking apparatus and method using reduction furnace and electric furnace are provided to stabilize quality of molten steel, additionally produce reduced iron in the high temperature state from the reduction furnace and produce molten steel by charging the reduced iron along with scrap into the electric furnace. CONSTITUTION: A hybrid steelmaking apparatus(1000) comprises a reduction furnace(100) into which iron ore is charged through ore charging hole(104), in which the charged iron ore is reduction reacted by flue gas supplied through main gas pipe(301) connected to a lower part of the reduction furnace, and on a lower part of which a reduced iron discharger(101) is mounted to discharge the reduced iron ore to the outside; a storage tank(200) which is extended from an exit end of the reduced iron discharger, to an upper part of which a lower end of reduced iron supply pipe(201) having high temperature sealing type upper valve(202) is connected, from which the reduced iron is discharged, to a lower part of which an upper end of reduced iron discharge pipe(203) having high temperature sealing type lower valve(204) is connected, and which is equipped with a load cell(205) for measuring weight of reduced iron stored in the storage tank so that the reduced iron is temporarily stored in the storage tank; a multi-directional ore valve(250) installed between the reduced iron discharge pipe and the ore pipes to distribute the reduced iron discharged to the outside through a reduced iron charger(206) mounted on the reduced iron discharge pipe to any one of at least two or more of ore pipes(251,252); and at least two or more of electric furnaces(300,300a) to which a lower end of the ore pipe is connected so that the reduced iron is charged into the electric furnaces, into which scrap is charged through scrap charging hole, wherein the electric furnaces comprise electrode rods(302,302a) for providing electric energy, injection nozzles(303,303a) for injecting oxygen as well as semi-soft coking coal for providing thermal power energy and subsidiary raw materials for forming slag, and gas pipes(304,304a) for discharging flue gas generated when burning semi-soft coking coal with oxygen to the main gas pipe.
摘要翻译：目的：提供使用还原炉和电炉的混合炼钢设备和方法，以稳定钢水质量，另外从还原炉中生产高温状态的还原铁，并通过将还原铁与废料一起装入电炉。构成：混合炼钢设备（1000）包括还原炉（100），铁矿石通过矿石填充孔（104）装入铁矿，其中通过主气管（301）供应的烟气还原反应的带电铁矿石，连接到还原炉的下部，并且在其下部安装有还原铁排放器（101）以将还原铁矿石排出到外部; 从所述还原铁放出器的出口端延伸到其上部的具有高温密封型上阀（202）的还原铁供给管（201）的下端连接的储罐（200）还原铁排出到其下部，连接有具有高温密封型下阀（204）的还原铁排放管（203）的上端，并且配备有用于测量的测力传感器（205）储存在储罐中的还原铁的重量使得还原铁暂时储存在储罐中; 安装在还原铁排出管和矿石管之间的多方向矿石阀（250），用于将安装在还原铁排放管上的还原铁充电器（206）排放到外部的还原铁分配至少至少两个或多个矿石管（251,252）; 以及至少两个或更多个电炉（300,300a），其中矿石管的下端连接到其上，以便将还原铁装入电炉中，通过废料装料孔向其中装入废料，其中电炉包括用于提供电能的电极杆（302,302a），用于注入氧气的注射喷嘴（303,303a）以及用于提供热能的半软焦煤和用于形成炉渣的辅助原料，以及用于在将主要燃气管道用氧气将半软焦煤燃烧时产生的烟气排放。

4. 发明公开

KR1020020049590A 미분을 재활용하는 분철광석의 유동층식 용융환원장치 및이를 이용한 용융환원방법 有权
标题翻译：用于回收精炼和减少硫化还原方法的铁粉末粉末流化减肥装置
公开(公告)号：KR1020020049590A
公开(公告)日：2002-06-26
申请号：KR1020000078780
申请日：2000-12-19
申请人： 주식회사 포스코 , 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원
发明人： 최낙준 , 김행구 , 강흥원 , 정선광
IPC分类号： C21B13/00
CPC分类号： Y02P10/212
摘要： PURPOSE: An apparatus is provided which improves a process actual yield and reduces production cost by recycling dust or reduced iron powder generated from the fluidized-bed smelting reduced iron making process in the process, thereby minimizing loss of raw materials, and a smelting reduction method using the apparatus is provided. CONSTITUTION: In a fluidized-bed smelting reduction apparatus of iron ore powder in which a melter gasifier cyclone(510) and a fluidized-bed reactor(200) are connected each other through a reduced gas supply pipe(511) while a melter gasifier(500) and the melter gasifier cyclone(510) are connected each other through a dust circulation pipe(502), the fluidized-bed smelting reduction apparatus of iron ore powder for recycling fines comprises a classifier(320) supplying lump reduced iron to the melter gasifier(500) by separating lump and powder from briquette supplied from an agglomerator(310); a pulverizer(330) pulverizing the material by receiving a powder material from the classifier(320); a fine powder storage hopper(400) storing pulverized raw material supplied from the pulverizer(330), and fine powder of iron ore and subsidiary raw materials supplied from a dust collector(110); and a charging hopper(410) supplying fine powder of raw materials supplied from the fine powder storage hopper(400) into the melter gasifier(500) through a fine powder charging pipe(421) connected to the dust circulation pipe(502).
摘要翻译：目的：提供一种提高工艺实际产量并降低生产成本的方法，通过回收流化床熔炼还原铁生产过程中产生的灰尘或还原铁粉，从而最大限度减少原料损失，并减少冶炼方法使用该装置。构成：在铁矿石粉末的流化床熔融还原装置中，其中熔融气化炉旋风分离器（510）和流化床反应器（200）通过还原气体供应管（511）彼此连接，同时熔化气化器 500）和熔化炉气化炉旋风分离器（510）通过粉尘循环管（502）彼此连接，用于回收细粉的铁矿石粉末的流化床熔融还原装置包括向熔化器供应块状还原铁的分级器（320）气化器（500）通过从凝聚器（310）提供的块状体中分离出块状物和粉末; 粉碎机（330），通过从分级机（320）接收粉末材料粉碎材料; 存储从粉碎机（330）供给的粉碎原料的细粉末储存料斗（400）和从集尘器（110）供给的铁矿石和辅助原料的细粉末; 以及通过与粉尘循环管道（502）连接的细粉末充填管（421）将从微粉末储存料斗（400）供给的原料的细粉末供给到熔炉气化器（500）的装料斗（410）。

5. 发明授权

KR100332926B1 유동환원로에서 분철광석 배출위치 제어장치 有权
标题翻译：用于控制流化床反应器中精细颗粒排放高度的装置
公开(公告)号：KR100332926B1
公开(公告)日：2002-04-20
申请号：KR1019990060748
申请日：1999-12-23
申请人： 주식회사 포스코 , 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원
发明人： 정선광 , 박석인 , 강흥원 , 최낙준
IPC分类号： C21B13/00
摘要： 본발명은유동환원로를이용하여용철을제조하는공정에서각 유동환원로내의광석이배출될때 유동층내에서의체류시간을조절할수있도록광석배출높이를조절하여광석의환원율을간편하게제어할수있도록개선된유동환원로의분철광석배출위치제어장치에관한것이다. 본발명은분철광석이장입되고, 배출되는광석장입,배출관(13)(15), 환원가스가도입, 배출되는가스도입, 배출관(11)(12) 및유동층을형성하도록도입된환원가스를고르게분산하는분산판(14)을갖추어용철을제조하는유동환원로(10)에있어서, 상기광석배출관(15)의입구단으로부터상기유동환원로(10)내로돌출되어일정높이수직연장되는수직관(21)을갖추고, 상기수직관(21)내에는상하이동가능하게일정길이의이동관(22)이조립되며, 상기이동관(22)의상부에는환원반응된광석의유입이이루어지는광석유입망(23)이장착되고, 상기광석유입망(23)의상부면과일단이연결된강선(24)을권취한드럼(26)을정방향또는역방향으로회전시켜상기이동관(22)의광석유입망(23)높이를조절하는모터부재(25)를갖추어구성하는유동환원로의분철광석배출위치제어장치를제공한다.

6. 发明授权

KR100332924B1 분철광석의 점착을 방지할 수 있는 3단 유동층식 환원장치및 이를 이용한 환원방법 失效
标题翻译： 3一种用于防止在用于还原细铁矿石的3步流化床型装置中粘着的装置及其方法
公开(公告)号：KR100332924B1
公开(公告)日：2002-04-20
申请号：KR1019990059509
申请日：1999-12-20
申请人： 주식회사 포스코 , 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원
发明人： 최낙준 , 정선광 , 김행구 , 강흥원 , 하우젠베거프란츠
IPC分类号： C21B13/00
CPC分类号： C21B13/002 , C21B13/0033 , C21B13/14 , C21B2100/44 , C22B5/14 , Y02P10/136 , Y02P10/216
摘要： 본발명은용융가스화로더스트를이용하여유동환원단계에서발생하는분환원철의점착등을방지할수 있는유동층식환원장치및 이를이용한환원방법에관한것이다. 본발명은, 입도분포가넓은분철광석을 1차환원시키는제 1유동층로, 제 1유동층로로부터배출된 1차환원된분철광석을 2차환원시키는제 2유동층로, 제 2유동층로에서배출된 2차환원된분철광석을 3차환원시키는제 3유동층로, 상기제유동층로의배가스중의미립광석을포집하여재순환시키는제1,2 및 3사이클론, 그리고최종환원된철광석을용융하여용선을제조하는용융가스화로를포함하여구성된유동층식환원장치에있어서, 상기용융가스화로로부터배출되는다량의탄소함유배가스중더스트를 1차적으로포집하는제 4사이클론; 상기제 4사이클론으로부터공급받은환원가스중극미립더스트를 2차적으로포집하는제 5사이클론; 상기제 5사이클론의극미립더스트를상기제 3유동층로로취입하기위한제 1,2 및 3 더스트저장빈과제 1, 2 질소취입장치;를포함하여구성된 3단유동층식환원장치, 및이를이용한환원방법에관한것을그 요지로한다.

7. 发明公开

KR1020010057420A 유동환원로의 백업가스 공급장치 有权
标题翻译：供应流量减少炉备用气体的设备
公开(公告)号：KR1020010057420A
公开(公告)日：2001-07-04
申请号：KR1019990060749
申请日：1999-12-23
申请人： 주식회사 포스코 , 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원
发明人： 정선광 , 최낙준 , 김행구 , 강흥원
IPC分类号： C21B13/00
CPC分类号： C21B13/0033
摘要： PURPOSE: A supplying apparatus for back-up gas of a flow type reduction furnace capable of solving defluidization simply and stably by detecting pressure difference and temperature change generated when a nozzle is clogged and back-up supplying nitrogen gas to the lower part of a reactor is provided, which can normalize operations quickly and makes it possible to stably perform long-term operations. CONSTITUTION: This supplying apparatus comprises: exhaust pipe differential pressure gauges(25)(35)(45) for detecting pressure difference and temperature gauges(26)(36)(46) for detecting reducing gas temperature placed at ore discharge pipes(23)(33)(43); furnace differential pressure gauges(27)(37)(47) for detecting pressure difference of the upper and lower part of distribution plates(24)(34)(44); and nitrogen gas lines(29)(39)(49) having on-off valves(28)(38)(48) to supply nitrogen gas to a preheating furnace(40), a preparatory reduction furnace(30) and a final reduction furnace.
摘要翻译：目的：一种流式还原炉的备用气体供给装置，其能够通过检测喷嘴堵塞而产生的压力差和温度变化，并且将氮气供给到反应器的下部，从而简单稳定地求解流体流动，能够快速地进行操作规范化，并且可以稳定地执行长期操作。构成：该供给装置包括：用于检测压力差的排气管差压计（25）（35）和用于检测排放管（23）上的还原气体温度的温度计（26）（36）（46）（33）（43）; 用于检测分配板（24）（34）（44）的上部和下部的压差的炉差压计（27）（37）（47）; 和具有用于向预热炉（40）供给氮气的开关阀（28）（38）（48）的氮气管线（29）（39）（49），预备还原炉（30）和最终还原炉。

8. 发明公开

KR1020010054550A 유동반응로에서 역혼합 방지장치 有权
标题翻译：用于防止流化床反应炉中反混合的装置
公开(公告)号：KR1020010054550A
公开(公告)日：2001-07-02
申请号：KR1019990055407
申请日：1999-12-07
申请人： 주식회사 포스코 , 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원
发明人： 김행구 , 정선광 , 이일옥 , 최낙준
IPC分类号： C21B13/00
CPC分类号： C21B13/0033 , Y02P10/136
摘要： PURPOSE: An apparatus for preventing back mixing in a fluidized bed reactor is provided which uniformly controls the retention time of powder ore and smoothly shifting flow of the powder ore along the partition by guiding the flow of the charged powder ore in a spiral form. CONSTITUTION: In a molten iron manufacturing facility in which a reduction gas is supplied from a gasifying melting furnace and the charged powder ore is reduction reacted inside a fluidized bed reactor (10), wherein a dispersion plate (9) is mounted in the inner space of the fluidized bed reactor (10) to which powder ore is supplied from a charging pipe (2), the apparatus comprises a charging pipe (2) installed so that the lower end of the charging pipe (2) is adjacent to the center upper surface of the dispersion plate (9) by penetrating the center upper surface of the fluidized bed reactor (10); a spiral roll type partition (3) installed on the upper surface of the dispersion plate (9) so that the flow of powder ore is spirally guided surrounding the center of the charging pipe (2); and a vertical partition wall (4) formed on the back end part of the partition (3) so that the reduction reacted powder ore is discharged toward a discharging tube (5).
摘要翻译：目的：提供一种在流化床反应器中防止回混的装置，其通过引导带电粉末矿石的螺旋形式的流动来均匀地控制粉矿的保留时间并平滑地沿着分隔件移动粉矿的流动。构成：在其中从气化熔炉供给还原气体并且在流化床反应器（10）内还原反应的带电粉末矿石的铁水制造设备中，其中分散板（9）安装在内部空间所述流化床反应器（10）从所述加料管（2）供入粉矿，所述装置包括装料管（2），所述加料管（2）安装成使得所述加料管（2）的下端邻近所述中心上部通过渗透流化床反应器（10）的中心上表面，分散板（9）的表面; 安装在分散板（9）的上表面上的螺旋辊型分隔件（3），使粉矿的流动围绕着充气管（2）的中心螺旋地引导; 以及形成在分隔件（3）的后端部上的垂直分隔壁（4），使得还原反应的粉矿被排出到排出管（5）。

9. 发明公开

KR1020000038829A 용융가스화로에공급되는미분의분급장치및이를이용한미분의분급방법 失效
标题翻译：分配精细粉末供应给气体燃料的装置和方法
公开(公告)号：KR1020000038829A
公开(公告)日：2000-07-05
申请号：KR1019980053957
申请日：1998-12-09
申请人： 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원 , 주식회사 포스코
发明人： 슈토킹어요셉 , 나클미첼 , 쉔크요하네스레오폴드 , 케플링어베르너레오폴드 , 강흥원 , 정선광 , 최낙준 , 김행구
IPC分类号： C21B13/00
CPC分类号： C21B13/143 , C21B13/0033 , C21B2100/44 , F27D2099/0093
摘要： PURPOSE: A device and a method are provided to distribute fine powder collected in hot cyclone of a Melter Gasifier before supplying to a melter gasifier in a cortex process. CONSTITUTION: Large particles flying due to an abnormal operation in a melter gasifier(100) are transferred to a hot cyclone(200) via a first exhaust gas discharge pipe(101) with fine particles sprayed to the exhaust gas, collected in the hot cyclone, divided from the exhaust gas, and injected to the lower part of a flowing layer passage(300) via a fine powder supply pipe(202). The exhaust gas separated from the fine powder is discharged from the hot cyclone via a second exhaust gas discharge pipe(201). Inactive gas or exhaust gas is supplied to the flowing layer passage via the first exhaust gas pipe and the second exhaust gas pipe. The fine powder supplied to the flowing layer passage is flowed or flow-reduced in the flowing layer passage, injected to the melter gasifier via a fine powder discharge hole(306) and a fine powder discharge pipe(307), and melted or reduced by a dust burner(309). The large particles having size over a certain degree fall on being supplied to the flowing layer passage, are discharged via a large particle discharge hole(304) and a large particle discharge pipe(307), and stored in a large particle storage tub(400).
摘要翻译：目的：提供一种装置和方法，用于在皮质过程中向熔化器气化器供应之前，将收集在Melter气化器的热旋风分离器中的细粉分散。构成：由熔化炉气化器（100）中的异常操作飞散的大颗粒通过第一废气排放管（101）被转移到热旋风分离器（200），细颗粒喷射到废气中，收集在热旋风分离器与排气分离，经由细粉供给管（202）喷射到流动层通路（300）的下部。从细粉末分离的排气通过第二排气排出管（201）从热旋风分离器排出。非活性气体或排气通过第一排气管和第二废气管供给流动层通道。供给到流动层通道的细粉末在流动层通道中流动或流动，经由细粉末排出孔（306）和细粉末排出管（307）注入熔融气化器中，并通过灰尘燃烧器（309）。通过大粒子排出孔（304）和大型排出管（307）排出经过一定程度的尺寸的大颗粒被供给到流动层通道，并储存在大颗粒储存桶（400）中）。

10. 发明公开

KR1020000038828A 낙광처리가가능한용선제조장치및이를이용한용선제조방법 失效
标题翻译：装置及其制造方法
公开(公告)号：KR1020000038828A
公开(公告)日：2000-07-05
申请号：KR1019980053956
申请日：1998-12-09
申请人： 뵈스트-알핀 인두스트리안라겐바우 게엠바하 , 재단법인 포항산업과학연구원 , 주식회사 포스코
发明人： 정선광 , 최낙준 , 정우창 , 김행구
IPC分类号： C21B13/00
CPC分类号： C21B13/146 , C21B13/0033 , C21B13/143
摘要： PURPOSE: A method of manufacturing a molten iron is provided to secure safety in working by processing falling ores and integral in manufacturing a molten iron. CONSTITUTION: In starting to work, third, sixth and ninth falling-light discharge valves(291,391,491) are closed and second, fifth and eighth ones(281,381,481) are opened to feed falling light to a molten gas furnace(10), a final pre-reduction furnace(30) and a pre-reduction furnace(20). The second, fifth and eighth discharge valves are closed and the other ones are opened to supply the falling light to a bin(50) if the flow rate of reduction gas reduced or stopped feeding from the molten gas furnace. In supplying the light to the bin, the residual light is emitted to the bin by purging nitrogen into a preheating furnace(40), the pre-reduction furnace and the final one.
摘要翻译：目的：提供一种制造铁水的方法，以通过处理落下的矿石来确保工作的安全性并且一体地制造铁水。构成：开始工作时，关闭第三，第六和第九降光排放阀（291,391,491），打开第二，第五和第八个（281,381,481）以将落下的光馈送到熔融炉（10），最后的预 - 还原炉（30）和预还原炉（20）。如果从熔融气体炉送出的还原气体的流量减少或停止，则第二，第五和第八排出阀关闭，另一个打开以将落下的光提供给箱（50）。在将光供应到垃圾箱时，通过将氮气吹扫到预还原炉（40），预还原炉和最终炉中，将残留的光排放到垃圾桶。

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