Abstract:
Die Erfindung betrifft eine Vorrichtung zur Positionierung eines auslenkbaren Materialkorbs an einer Beschickungsöffnung eines Schmelzofens, einen Schmelzofen mit einer solchen Vorrichtung, ein Verfahren zur Positionierung eines Materialkorbs sowie ein Verfahren zur Beschickung eines Schmelzofens. Die Vorrichtung verhindert zuverlässig ein Schwingen oder Pendeln eines mittels eines Krans bewegten, auslenkbaren Materialkorbs beim Anfahren an den Schmelzofen und beim Entleeren.
Abstract:
The present invention proposes a method for feeding a burden to a blast furnace (32), wherein the method comprises providing a charging device (38) having at least one material hopper (40), the material hopper (40) comprising a hopper chamber (42), a material inlet aperture for feeding a burden into the hopper chamber (40), and a material discharge aperture for feeding a burden from the hopper chamber (40) to the blast furnace (32); the material inlet aperture having an associated inlet seal valve 44) for opening and closing the material inlet aperture and the material discharge aperture having an associated material discharge valve (46) for opening and closing the material discharge aperture. The method further comprises opening the material inlet aperture and closing the material discharge aperture; feeding a burden into the hopper chamber (40) through the material inlet aperture; closing the inlet seal valve (44); pressurizing the hopper chamber (40) by feeding pressurizing gas into the hopper chamber (40); and opening the material discharge valve (46) and feeding the burden from the hopper chamber (40) to the blast furnace (32). According to an important aspect of the invention, the method comprises feeding a predetermined amount of pressurized flushing gas through the hopper chamber (42) before pressurizing the hopper chamber (42), wherein the flushing gas comprises at least 75% carbon dioxide.
Abstract:
In a charging process of a shaft furnace, in particular of a blast furnace, batches of charge material are typically discharged in cyclical sequence into the furnace from a top hopper using a flow control valve. A method and system is proposed for adjusting the flow rate of charge material in such a process. Pre-determined valve characteristics for certain types of material are provided, each indicating the relation between flow rate and valve setting for one type of material. According to the invention, a specific valve characteristic is stored for each batch of charge material, each specific valve characteristic being bijectively associated to one batch and indicating the relation between flow rate and valve setting of the flow control valve specifically for the associated batch. In relation to discharging a given batch of the sequence the invention proposes: using the stored specific valve characteristic associated to the given batch for determining a requested valve setting corresponding to a flow rate setpoint and using the requested valve setting to operate the flow control valve; determining an actual average flow rate for the discharge of the given batch; correcting the stored specific valve characteristic associated to the given batch in case of a stipulated deviation between the flow rate setpoint and the actual average flow rate.
Abstract:
The invention relates to computer-implemented charging of a blast furnace equipped with an automated top-charging installation and stockhouse for batchwise charging. It proposes: obtaining a nominal charge dataset reflecting a nominal blast furnace charge and comprising plural charge material records, each charge material record comprising a material type and an associated nominal charge quantity; generating a graphical user interface comprising batch data fields for entering and displaying plural batch datasets for pre-configuring batches, each batch dataset comprising at least one batching record, each batching record comprising a material type and an associated batching proportion. According to the invention, the batching proportion associated to a material type in a batching record is used for predefining a ratio between the material quantity that is to be contained in a batch and the nominal charge quantity. Further according to the invention, the method comprises computing, for the respective material type of each batching record, based on the batching proportion and the nominal charge quantity associated to the respective material type, an associated batching quantity which the stockhouse is to provide in a batch as pre-configured by the batch dataset.
Abstract:
A charging device for a shaft furnace, which comprises at least one charging hopper having a discharge orifice arranged in a position off-centre with respect to the central axis of the shaft furnace, and a material distribution device arranged below this hopper. The material distribution device comprises a feed channel coaxial with the central axis of the furnace and a rotatable, pivotable chute, which is arranged below the feed channel for distributing a charge in the shaft furnace. The charging device also comprises a connecting box in the shape of a funnel, arranged between the material distribution device and the charging hopper. The connecting box possesses a lower central outlet communicating with the charging hopper and at least one upper inlet which is arranged off-centre with respect to the central axis of the furnace and communicates with the discharge orifice of the hopper. According to the invention, the charging device comprises at least one spreader situated upstream of the distribution device, on the trajectory of the material discharged from the discharge orifice. The spreader enables a flow of material to be dispersed to both sides of the feed channel.
Abstract:
Изобретение относится к черной металлургии и может быть использовано в процессах прямого легирования стали в сталеплавильных агрегатах, сталеразливочных ковшах или установках для внепечной обработки. Установка для подачи материалов в металлургический агрегат содержит распределительный механизм, выполненный в виде воронки и поворотного желоба с приводом, и промежуточные бункеры, взаимосвязанные с труботечкой, при этом установка снабжена корпусом с крышкой и средствами крепления к конструкциям цеха, при этом воронка установлена в крышке, поворотный желоб – под крышкой, а промежуточные бункеры расположены радиально в корпусе с образованием обращенными в сторону продольной оси установки поверхностями бункеров полости, отделенной от внутреннего пространства бункеров, при этом бункеры связаны с труботечкой посредством выполненных в них разгрузочных отверстий и установленных с возможностью перемещения относительно продольной оси бункера задвижек. Предлагаемая установка обеспечивает быстроту при подаче материалов в металлургический агрегат, ее использование при прямом легировании стали обеспечивает синхронизацию процессов плавления исходных материалов и восстановления легирующих элементов.
Abstract:
Charging material needs to be distributed evenly in an enclosure 30 in form of a furnace or reactor to ensure its best operation. To this end a charging material distribution inside the enclosure 30 of the furnace is used which has a movable charging means 4 in form of a spout through which the charging material is fed into the enclosure 30. The distribution device according the present invention is small in size and light in weight and has a moveable charging means 4 in form of a spout which is suspended on a gimbal suspension 2 on a fixed charging means in form of a chute 3 inside the enclosure 30.
Abstract:
The invention relates to a shaft furnace-loading device comprising: two parallel transfer tanks (16, 16'), a device (20) which is used to distribute the material and which comprises a rotary, swinging chute (24), and a connecting casing (30). The inventive device also comprises a third transfer tank (60) having a substantially lower loading capacity than the first two transfer tanks (16, 16'). The third transfer tank (60) comprises a lower part (62) which is disposed in the extension of the axis (15) of the supply channel (22) of the material-distribution device (20) between the lower funnel-shaped ends (18, 18') of the other two transfer tanks (16, 16'). The invention can be used precisely to direct small quantities of material into the furnace.
Abstract:
A plurality of fluxing agent inlets (320) are provided at the lower part of a waste processing chamber (10) to enable the direct application of fluxing agents to deposited "unprocessed solids" and/or to liquid products of high viscosity therein. Means (46, 330, 600) are provided for sensing the presence of such blockages in the lower part of the chamber and for providing the fluxing agents thereto to remove the blockage.
Abstract:
The invention relates to an apparatus for feeding finely divided solids, containing at least sulphidic metal concentrate, and oxygenous oxidizing gas into a suspension smelting furnace, said apparatus comprising elements for conducting solids and oxidizing gas into the suspension smelting furnace. According to the invention, in the feed office (7) of the suspension smelting furnace through which solids (2) and oxidizing gas (3) are fed into the action chamber (1) of the suspension smelting furnace, there is installed a suspension creation chamber (5, 11) for a suspension containing solids (2) and at least part of the oxidizing gas (3) can be mixed to form a suspension before they flow into the reaction chamber (1) of the suspension smelting furnace.