1.1 Design and function of the slag grinding plant 矿渣研磨厂的设计和功能
Details of the design and functioning of the individual machines or plant components of the slag grinding plant are given below.
以下是矿渣粉磨系统内各单个设备或部件的设计和功能。
1.1.1 Raw material feeding 原料进料
The raw material which consists of slag and gypsum is conveyed via the speed-controlled weighbelts, item no. 5D1.WE01, 5D1.WE02 and 5D1.WE03 and is guided in a
controlled flow rate in the troughed belt conveyor 5D1.BC01 in accordance with the set mix-ture.
原料包括矿渣和石膏，经过调速皮带称(项目号5D1.WE01，5D1.WE02)流量控制，按照设定的混合比用槽形皮带机(5D1.BC01)输送。
To protect the roller mill from metallic foreign bodies a suspended magnetic separator, item 5D1.MS01.MSJ01 and a metal detector, item 5D1.MT01.MTJ01 are installed above the common conveyor belt 5D1.BC02 of the raw material components. The suspended mag-netic separator basically consists of a permanent magnet, which is enclosed by a belt con-veyor provided with transverse galleries. During operation the iron parts attracted by the magnet are brought with this belt conveyor out of the area of the magnetic field and are dis-charged in a collecting container.
为保护辊磨，清除金属异物，原料输送皮带机(5D1.BC02)上装有悬挂式电磁除铁器和金属探测器(项目号5D1.MS01.MSJ01和5D1.MT01.MTJ01)。悬挂式电磁除铁器主要包括一个永磁铁，配有一条横向的回转皮带。在操作中铁块物被磁铁吸起，当回转皮带超出磁力范围后铁块物掉落至收集箱内。
We know from experience that the suspended magnetic separator alone does not remove all iron parts. Thick material layers on the troughed belt conveyor, coarse grain size ranges or sticky and moist material can make removal of the iron more difficult. Non-magnetic tramp metal also is no collected. Therefore, an additional metal detector (item 5D1.MT01.MTJ01) also is installed.
根据经验，我们知道仅仅使用悬挂式电磁除铁器是不能除去所有铁颗粒的。皮带机上较厚的料层，较粗的进料粒径以及粘稠潮湿的物料都使除铁变得更加困难。另外，也无法除去无磁性的夹杂金属物，因此，需增加安装金属探测器。
The metal detector contains transmitting and receiving coils with an alternating magnetic field of high frequency between them which is generated by an oscillator in the controller. When a metal part passes the field, eddy currents form as a result of induction and take away energy from the oscillator. A signal is formed from this which is relayed to the control system of the change-over flap, item 5D1.CF01.CFJ01. The change-over flap removes the metal con-taining new feed material and discharges it in a container. To avoid frequent removals, it is necessary not to detect tramp metal which is not greater than a minimum size. The small tramp metal passes in the raw mill and is collected for the most part in the collecting device for light section steel of the bucket elevator.
金属探测器包括转换器和在控制器中由振荡器产生高频的交变磁场的接收组件。当金属物通过 磁场时会产生涡流，结果形成感应并从振荡器中带走能量。从这里产生一个信号并延时传给转向阀(项目号5D1.CF01.CFJ01)的控制系统。转向阀将夹杂金属物的物料排放至收集箱中。为避免频繁的除去，不需要探测小于最小尺寸的夹杂金属。小的夹杂金属通过磨机进入提升机，大部分细铁颗粒在提升机装置内的收集器被收集。
The rotary airlock feeder, item 5F1.CV01.CVJ01 is used as airlock for the roller mill. To avoid caking of the slag the rotary airlock feeder is heated by a gas stream. The material is guided onto the grinding table via a chute which is also heated.
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锁风转饲机(项目号5F1.CV01.CVJ01)为辊磨密封空气用。为避免矿渣结块旋转喂料机通有热气加热。物料导入磨盘经过的料槽也被加热。
1.1.2 Roller mill RMC 51/26 立式辊磨
The general design of the roller mill is explained with Figure 1. 立磨总图设计见图 1。
The essential component of the roller mill is the grinding table with two concave grinding tracks (on the inside and outside) and the two roller pair units (designation 3) which run on the bed of material. The grinding table is driven by the motor (2), the grinding rollers are fixed in their position. The raw material is fed to the mill via a chute and falls directly onto the centre of the grinding table. The material is then carried under the rollers by the rotation of the table. The ground material is flung outwards over the edge of the grinding table and en-trained in the stream of gas from the nozzle ring (9). All of the material ejected from the grinding table, or a certain proportion of it is carried in the gas stream to the separator (10). 辊式磨主要是由有2道凹形磨辊轨迹(内轨和外轨)的磨盘和运转在料床上的2组磨辊对(每组一对磨辊，标示3)组成。磨盘由马达(标示2)驱动，磨辊被固定在原位置。原料通过一个喂料槽直接落在磨盘的中心。然后料被转动的磨盘带动进入磨辊。被碾磨过的料向外甩出越过磨盘的边界进入从喷嘴环(标示9)来的气流中。被磨盘甩出的物料，全部或者一部分被气流带至选粉机(标示10)。
The grinding force of the rollers is hydraulically applied on the material via the tie rods (5). The confining air system (7) protects the grinding roller bearings from entering dust. The bed of material can be stabilised with the water injection system (11).
磨辊的碾磨压力来自液压系统，通过拉杆(标示5)加载在碾磨物料上。空气密封系统(标示7)保护磨辊轴承防止灰尘进入。喷水(标示11)可以稳定料床。
The separator (10) classifies the ground material into finished product and oversize. The oversize material falls back onto the centre of the grinding table (4), while the finished prod-uct is carried to the downstream filter by the stream of gas.
选粉机(标示10)将研磨过的料分离成成品和过粗料。粗粉料落回磨盘(标示4)中心，成品则被气流带入下一步的收尘机中。
The gas velocity in the nozzle ring (9) of the roller mill can be adapted to the grinding plant requirements by adjusting the nozzle segments. Material lumps which cannot be carried to the separator in the hot gas stream fall through the nozzle ring and are returned to the mill via the recirculating bucket elevator.
磨机内喷嘴环(标示9)处的气流速度可以通过调整喷嘴截面来满足粉磨系统要求。粗物料无法被热气带至选粉机而掉落入喷嘴环内，通过外循环提升机送回到磨中。
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圖1：立磨总图設計
Housing (1)壳体
Drive Unit (2)驱动装置 Roller pair units (3)辊轮组 Grinding table (4)磨盘 Tie rods (5)拉杆
Hydraulic system (6)液压系统 Confining air system (7)空气密封系统 Dismounting device (8)拆解装置 Nozzle ring (9)喷嘴环 Seperator (10)选粉机 Water injection (11)喷水
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1.1.2.1 Mill housing 磨机外壳
Doors for inspection, maintenance, assembly and installation purposes are installed in the upper housing section of the roller mill. In sections particularly exposed to wear, the housing is provided with replaceable wear protection. The nozzle ring consists of Hard Faced Com-pound Steel Plate (VAUTID, EURODUR; or similar). Above the nozzle ring, DENSIT cas-settes(Ceramic Mortar) are installed at the lower end, and above them a scaled wear lining made of a special AR-plate (CREUSABRO 4000).
安装在磨机上部外壳上的门是为了检查、维护保养、组装及安装的目的。尤其在易受磨损的部位，磨机外壳提供了可更换的磨损保护件。喷嘴环是由表面硬化的复合耐磨钢板(VAUTID, EURODUR;或类似的)构成。在喷嘴环上面，较低部位安装的是DENSIT盒(陶磁砂浆)，上面部位是由特别的AR板(CREUSABRO 4000)制成的片状耐磨衬板。
Hot gas is supplied to the roller mill housing via two hot gas pipe sockets. The seal between the casing and the grinding table is a sliding contact seal. Dust cannot deposit, as always small quantities of false air enter through this seal.
热风通过2个热风进口管接口进入磨机。在磨机外壳和磨盘间的密封是滑动接触式密封。因为密封间总是存在少量漏风，粉尘不能附着。
To control the hot gas supply in the mill interior, the nozzle ring is installed above the hot gas pipe socket. The nozzle ring consists of several adjusting segments for varying the gas ve-locity by altering the cross-sections. The hot gas stream emerges at high velocity, entrains the material from the grinding table and carries it upwards to the SEPOL separator. The gas velocity in the nozzle ring is a crucial parameter for the grinding process. The cross-section of the nozzle ring can be altered from outside.
为控制磨机内的热风量，喷嘴环位于热风管接口之上。喷嘴环由数个可调节阀块组成，通过改变喷嘴截面可以调整气流速度。热风以高速流入，夹带着从磨盘甩出的物料，并将其向上带入SEPOL选粉机。在粉磨工艺操作中喷嘴环的气体流速是极重要的参数。喷嘴环的截面可以从磨机外面调整。
進 料
盒 子
復合式耐磨鋼板
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