![]() Installation for discharging metallurgical slag
专利摘要:
Molten slag is granulated with water to produce a granulated-slag/water slurry that is fed into the bottom of a horizontally extending foraminous drum. This drum has radially inwardly extending vanes and is rotated to lift up the granulated slag and separate it from the water, discharging the slag onto a conveyor belt for storage or further use. The water running out of the slag slurry is recirculated for use in the initial granulation step for the molten slag stream. 公开号:SU1181530A3 申请号:SU792754655 申请日:1979-04-18 公开日:1985-09-23 发明作者:Монтейн Гидо 申请人:Сидмар Сидерюржи Маритим С.А.(Фирма); IPC主号:
专利说明:
2. Installation under item 1, characterized in that the filtering surface of the drum is made of superimposed one on the other grids, moreover, the internal mesh is made with smaller cells than the outer 3, the apparatus according to claim 1, characterized in that it is provided with a device mounted above the drum for supplying compressed air to the filtering surface of the drum. This invention relates to a plant for unloading a metallurgical shpak of blast furnaces subjected to granulation by means of water. The aim of the invention is to ensure the continuity of the process, the proposed plant, water separated from granulated slag, is returned to the network of granulation water without cooling or after cooling in a known plant. The smallest solids that still pass through the rotating filter are collected by settling and re-enter the granulation process, from where they re-enter the filter. The water entering the cooling unit, due to the pre-sedimentation, is of good quality, which is necessary for just a closed network. If it is necessary to repeat the purification of water that re-enters the network, it is carried out as indicated. The purification of water during its separation from the granulated spit is very effective, because during the drinking of the pulp, i.e., the mixture of granulated slag — water, into the rotating drum and during the pulp path partially flowing along the wall rotating from the cylinder, most the granulation water passes through the underlying slag layer so that the water is double-filtered with slag and a filtering wall. In FIG. 1 shows the installation of dp unloading of metallurgical slag; Fig. 2 shows a rotating drum for separating solid grains and granular water, cross section; Fig, 3 - fixed tray; FIG. 4 is a section A-A in FIG. 3, The installation includes an outlet chute 1, a device 2 for water granulation, an expansion manifold 3, an outlet 4 equipped with a throttle 5 automatically adjustable and a rotating drum 6, the latter limited to the outside by a filter cylindrical wall 7. The filter surface is formed by sets two superimposed convex gratings with cells, the first grating 8 located inside, has frequent cells to filter, and the second grating 9 has rare cells limited by very strong wires lock to form a rigid support for the filtration cells. Inside the wall has transverse blades 10, which capture the granulated slag entering through the fixed tray 11. Part of the base of the blades, for example internal, can be filtering. Holes are provided in the side walls 12 of the rotating drum 6: on both sides for passage of the removal device made in the form of a belt conveyor 13, and on one side of the cylinder of the fixed tray 11. The drum 6 is driven by a motor controlled by the speed. (Not shown) . The conveyor belt, onto which the granules released from granular water fall through the funnel 14, is formed by an endless conveyor belt moving in the direction of the arrow at a required speed around the drums 15, of which at least one is connected with a motor with an adjustable rotation speed. The removal of the granulated slag can be effected with the aid of a second belt 16 into the hopper 17. 3 Under the drum 6 there is a catchment basin 18 which collects granulation water separated from the granulated slag. In the lower part 19 of the sump 18, the smallest solids passing through the rotating drum are transferred by pump 20 to a device 2 for water granulation. The purified water from the sump 18 is pumped through pump 21 to the granulation water tank 22 in the cooling tower 23. The latter is serviced during the process by the pump 21, and during idle running - by the circulation pump 24. The water is pumped through the valve 25 through . It is only during the granulation period of pump 26. The rotating drum 6 and the collector 3 are completely surrounded by a closed casing 27 with a chimney 28, and a blow-down ramp 29 is installed at the top of the drum, The installation works as follows. The slag in the liquid state flows either from the blast furnace or from the slag box through the discharge chute 1 to the device 2 for water granulation. Making contact of the water supplied under pressure with the liquid slag serves to cool the latter sharply and cause it to separate into grains that harden. Pulp, i.e. the slag grain mixture — water, flows out and is discharged — into the expanding reservoir 3. The cross section of the outlet channel 4 of this collector is of such dimensions that for any possible consumption of the mixture granulated slag - water this section is always filled with this mixture during the process. The outlet channel 4 is equipped with a throttle 5 automatically adjustable depending on the expansion manifold, in order to optimize the data for the process phase, i.e. soothe a powerful stream of pulp. The same regulation can obviously be carried out by other means, for example a flap. The throttle 5 is regulated on the one hand by the pressure acting on the part of the moving wall expanding right of the collector 3, ac the other hand, the pressure acting on the throttling diaphragm. Thanks to these measures, everything that passes through this section is submerged in water; gases and steam generated at the time of granulation do not enter the rotating drum, they are sucked through a casing located above the collector, 10 serving to collect a mixture of water granules; the powerful pulp stream is calmed by leveling; mechanical wear is minimal. The exit from expanding collector of torus 3, pulp is guided into rotating drum 6 for separation and removal. The pulp flows through the exhaust. Channel 4 under its own weight. After adding 20 of the auxiliary water, it may also be pumped by pumping through the ascending channels into the drum 6. However, the latter is not advisable due to pressure losses and a large amount. 5 wa of fine particles formed in this operation. At the entrance to the rotating drum the granular slag-water mixture 0 is distributed along the bottom of the cylindrical wall 7 of the drum 6 through the fixed tray 11, which allows to obtain a low speed and an even distribution, while water 5 flows out through the filter wall, the solid granules are moved by the blades around the circumference of the cylindrical wall upwards. After reaching the upper half of the cylinder, the granules released from the granulation water gradually begin to fall down through the funnel 14 to be collected on a belt conveyor 13, which removes them from the rotating drum. 5 During the removal by the belt conveyor, the internal heat contained in the slag is dried. Funnel 14 with a longitudinal drain hole oriented 0 along the belt conveyor provides for a uniform output of the granule mixture at low speed - water at the largest part of the drum bottom width, the flow area of the end part of the input tray is adjustable, as well as the concentration of granules falling at the end of their path to the middle part of the conveyor belt. In order to improve the water's weeping, especially with very fine filter cells, the rotating drum can be vibrated. To facilitate the flow of water, randomly carried along with the granulated slag as it moves to the blade, as along the drum wall, the transport vanes can be provided at least partially with a filtering surface. Since small particles of slag can clog the filtration cells, there is a branch on the top of the drum on a ramp that extends across the entire width of the drum and allows the jets of compressed air to be directed against its outer surface. The speed of the rotating drum 6 can be adjusted depending on the water level or the weight load of the cylinder to make the filtration optimal. The granulated slag, after rotating the drum by means of the belt 16, enters the hopper 17. The removal of the granulated slag can be carried out in an open storage area or directly onto vehicles such as trucks or railway cars. h t The smallest solids passing through the rotating filter drum are deposited in the lower part 19 of the sump 18 and immediately transferred by pump 20 to the granulation device 2. Exit from the collector 18, the purified water is supplied by means of a pump 21 to the granulation water tank 22, located in the cooling tower 23. From this reservoir, the water is directed by a pump 26 to a granulation device. Water is pumped only during the granulation period by pump 26. A controlled flow of fresh water is included in the process at the right time and place. The vapor and soot generated during the granulation process is removed through the casing 27 and the exhaust pipe 28. The leatherette can be equipped with devices for separating solid constituents as well as treating gaseous constituents. Solid waste can be recycled to the process. Considering that the slag-water mixture is removed as it is formed from the collector 3, the dimensions of this collector may be significantly smaller than the dimensions of the known sump. The dimensions of the drum 6 are also greatly reduced, so that the placement of such an installation near the blast furnace does not require excessive space. Processing the pulp without intermediate pumping maintains a minimum degree of particle size reduction. The slag thus obtained is of good quality, since the grains are not crushed by the wheels of the pumps and the friction in the pipes. The separated granulated slag is continuously removed from the treatment zone. Thus, it is not necessary to provide means of attaining and to stop treatment for periodic removal. In addition, the resulting slag has a very low humidity, which is necessary for most consumers. The advantage of the proposed facility is the recirculation of granulated water separated from solids in the casing, from where it can flow into a known granulation water system with a tank and a cooling cycle: as well as with possible purification. The result of processing in the proposed device does not depend on the amount of water contained in the pulp. This means that it is possible to equally successfully process the pulp obtained as a result of granulation and the pulp to which auxiliary water is added and, especially, for pumping. The water-granular slag ratio can be reduced to a minimum, which is advantageously reflected in energy costs.
权利要求:
Claims (3) [1] 1. INSTALLATION FOR UNLOADING METALLURGICAL SLAG, mainly slag from blast furnaces, subjected to water granulation, containing a drum with a filter surface, made with protruding transverse vanes for transporting granules and a removing device located along its axis, a stationary tray for feeding slag into a drum and a water tank connected by a pipe to a granulation device, characterized in that, in order to ensure the continuity of the process, it is equipped with an additional pipe, with unifying the water tank to the apparatus for granulation, performed with a cooling system and means for feeding fresh water. 1 118 1530 [2] 2. Installation according to π. 1, characterized in that the filtering surface of the drum is made of superimposed nets on one another, moreover, the inner mesh is made with smaller cells than the outer " [3] 3. Installation according to claim 1, characterized in that it is equipped with a device installed above the drum. For supplying compressed air to the filter surface of the drum.
类似技术:
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同族专利:
公开号 | 公开日 PL116505B1|1981-06-30| US4204855A|1980-05-27| DE2913524A1|1979-10-31| FR2423543A1|1979-11-16| FR2423543B1|1980-10-24| MX151843A|1985-04-03| GB2018612B|1982-09-02| CA1112876A|1981-11-24| ES479655A1|1980-07-16| GB2018612A|1979-10-24| US4289519A|1981-09-15| LU79466A1|1979-05-25| ATA274279A|1982-05-15| JPS6410455B2|1989-02-21| SE439628B|1985-06-24| JPS54145393A|1979-11-13| NL189606C|1993-06-01| AT369427B|1982-12-27| IT1112406B|1986-01-13| UA8426A|1996-06-28| PL214952A1|1980-03-10| NL7903039A|1979-10-22| IT7921722D0|1979-04-10| CS222162B2|1983-05-27| DE2913524C2|1987-02-05| SE7903173L|1979-10-19| BE875527A|1979-07-31| BR7902352A|1979-10-23| NL189606B|1993-01-04|
引用文献:
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申请号 | 申请日 | 专利标题 LU79466A|LU79466A1|1978-04-18|1978-04-18|PROCESS AND PLANT FOR TREATMENT AND HANDLING OF METALLURGIC DAIRY| 相关专利
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