KR100645082B1 - A method synthesize again waste matters and using an aduit form device - Google Patents

Abstract

A recycling method for industrial waste and a Briquetting machine therefor are provided to recycle ladle slag as subsidiary raw materials for secondary refining or blowing work according to the type thereof and scales and EAF(Electric Arc Furnace) powder as by-products by adding a reducing agent. In a recycling method for industrial waste, oxides recovered by a steel manufacturing plant are introduced into a vibration screen without passing through a primary pulverization step so that the oxides are separated to powder type particles having a diameter of 5mm or less and small lumps having a diameter larger than 5mm in a secondary separation step. In a third separation step, the lumps are pulverized and lumps having a diameter larger than 5mm are separated again. In storing step, powder type ladle slag, powder type scales, and various powder obtained from steel manufacturing and refining plants are stored. The ladle slag, the scales, and the powder are sorted for a Briquetting machine and a Pelletizer by automatic particle measuring step. In a binder supply step, an origin binder solution is stored, diluted by a predetermined concentration and measured in amount. In drying step, molds formed by the Briquetting machine are separated from damaged ones and moisture is removed therefrom. In cooling step, a reducing agent is added to particles formed by the Pelletizer in a reducing furnace of a temperature in the range from 1200 to 1300‹C and the reduced particles are cooled.

Description

A method synthesize again waste matters and using an aduit form device

1 is a schematic configuration diagram for explaining the industrial waste recycling method according to the present invention.

Figure 2 is a schematic configuration diagram installed by a stepwise arrangement of the metering equipment and mixer, the storage facility of the compound, the pressure feeder and the pressure molding machine and the conveyor below that is installed in the industrial waste recycling method of the present invention.

Figure 3 is a schematic installed by the stepwise arrangement of the rotary chiller, metering equipment and mixer, granulator (Pelletizer) and rotary reduction furnace of the structure for granulation is installed in the industrial waste recycling method of the present invention. Diagram.

Figure 4 is a schematic structural diagram of a pressure molding machine installed in the industrial waste recycling method of the present invention.

* Description of Signs of Major Parts of Drawings

Scale Chunks 13,15 Scale Initial Storage Facility

14 ... 1st grinding facility 18 ... 1st vibrating screen

21 ... 2nd vibration screen 25 ... 2nd grinding facility

27. 3rd vibration screen (Separation of 2nd stage)

33,37,49,54,59,64,68,70,72,86,89,92 ... Vertical Conveyor

34,50,55,60,65 ... Storage facilities 40,42,100. Dust collector

47 ... Steel Dust 52 ... Other By-Products

57.Reducing agent 62 ... Laddle slag

103. Binder

38,69,71,73,87,90,93 ... weighing equipment

104 Storage facilities 105,106,107 Concentration regulators

108,109,110 ... Weighing equipment 74,75,94 ... Mixers

78 ... Briquetting M / C 81 ... Slant screen

97.Pelletizer 98 ... Reduction Furnace

99 ... Product Cooler

The present invention can be recycled to steel mills and other industrial sites by processing the waste treated as waste, thereby reducing the production costs and improving the quality of the product, to solve the environmental problems, and collected slag And grasping the physical properties of coke, which can make steelmaking dust and scales into raw materials, and in particular, ladle slag is agglomerated so that it can be used to replace secondary raw materials such as quicklime and fluorspar, and powdered ladle slag contains iron oxide content. The low desulfurization ability and the ability to collect the contents make it possible to use it as a secondary raw material for secondary refining, and to make it possible to use the slag in the form of agglomerate as a secondary raw material in the converter blasting work without reprocessing. Industrial waste that can be used as by-product by reducing and cooling in high-temperature reducing furnace by adding silver reducing agent It relates to a recycling method and a molding apparatus used therein.

Generally, steel waste such as slag generated in steel production facilities and steel production facilities of steelmaking and steel mills, scales, steelmaking dust, etc. are agglomerated into bricks or embedded in landfills as they are generated. Most of them are.

As described above, when steel waste such as slag and scale, steel dust, etc. are buried in the landfill, it causes environmental pollution problems, as well as the steel waste and scale, such as steelmaking dust can not be recycled, There were many problems, such as increasing the production cost of the steel mill.

The present invention has been made in order to improve the conventional problems as described above, the object is to process the waste to be treated as waste can be recycled to steel mills and other industrial sites, etc., thereby reducing the production cost and product quality To solve environmental problems, and to understand the physical properties of the collected slag, steel dust, and coke that can be used to make scales, and in particular, the ladle slag is agglomerated to remove secondary raw materials such as quicklime and fluorspar. Powdered ladle slag has low iron oxide content, so it can be used as secondary raw material for secondary refining as it has excellent desulfurization ability and trapping ability. Also, it does not need to be reprocessed. The scale and EAF dust, etc. can be used as a secondary raw material during the converter drilling, A reduction in the reducing furnace. Cooling is to provide the recycling of industrial wastes that can be used as a by-product and molding the molding apparatus used therein.

As a technical means for achieving the above object, the present invention, ladle slag and oxides generated in steel mills and rolling mills, such as oxides, collected FAF dust and other industrial wastes such as steelmaking dust, scale, etc. The primary pulverization process and the primary pulverized industrial waste are separated into three stages with a relatively large lump shape and a very large lump having a particle diameter of about 5 mm or less and a particle diameter of 5 mm or more, and having a particle size of 5 mm or more separated in the primary separation process. Secondary crushing process for performing the second crushing of the small lump, the separation process for separating the pulverized industrial waste through a vibrating screen, and the industrial waste separated through the vibrating screen to convey through a belt conveyor A storage process for storing and adding a binder (Binder) to have a cohesive force when molding the stored industrial waste particles Mixing step of mixing through a mixer, and mixture mixing step of discharging the mixture blended with the binder by the mixing step to the lower side of the mixer, temporarily storing the mixture and discharging a certain amount and mechanical pressure to install the mixture below In the industrial waste recycling method comprising a molding process for pressing molding to a predetermined size through a molding machine,
Oxide recovered from the steel mill is a secondary separation process in which powdery particles are introduced into a vibrating screen and separated into powdery particles having a particle diameter of 5 mm or less, and lumps having a small particle size of 5 mm or more, without going through a first grinding process. ;
Agglomerates of 5 mm or more in diameter selected from the vibrating screen of the secondary separation process are pulverized through a secondary grinding process, and the pulverized product is separated into a powder form and a relatively small mass of 5 mm or more in the vibrating screen. A third separation process for storing each;
Transfer chute and vertical Kenvey to various steelmaking dusts generated in steel mills such as ladle slag separated into powder form of 5mm or less in steelmaking plant, scale scale separated from other processes, steelmaking and smelting, etc. A storage step of storing the ladle slag, scale, steelmaking dust, etc., vertically conveyed through the chute and the vertical conveyor;
In order to manufacture the stored ladle slag, scale, steelmaking dust, etc. according to the intended use, it is transported through a belt conveyor horizontally and vertically to divide into a briquettier and a pelletizer, and conveys the powdered particles to be transported. Particle automatic weighing process for measuring a certain amount through a log cell which is an automatic meter;
A binder supplying step of storing a stock solution of the binder in a blending step of adding and blending the binder, diluting and transporting the binder to a predetermined concentration, and measuring the amount of the binder;
The molded article press-molded by the pressing process falls to the buffer conveyor at the bottom of the pressure molding machine, wherein the buffer conveyor separates the molded product and the broken molded product by separating the molded product and the broken molded product at the rear end thereof, and separates the inside of the separated molded product. A drying step of drying to remove moisture; And

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Condensed granules formed in pelletizer by reducing the reducing agent in a high temperature reduction furnace of 1200 ~ 1300 degrees or more according to the use of recycled products, the cooling step of cooling the high temperature granules reduced in the reduction furnace; By providing an industrial waste recycling method characterized in that.

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In addition, the present invention is characterized in that the molding process is divided into a mechanical compression molding (Briquetter) and a granulator (Pelletizer) to be processed into small particles, each characterized by having a separate process.

In addition, the steelmaking dust generated in each process is characterized in that at least two or more dust collectors are installed separately, to collect the steelmaking dust and to transfer the collected steelmaking dust to the storage process.

In addition, the present invention is the raw material inlet flowing from the pressure feeder, and the lower portion is provided with an upper frame and a lower frame for supporting the entire molding machine, between the rotating shaft and the rotating pocket roll are respectively installed on both sides, Two bearing blocks are installed at both ends of the rotating shaft and the rotating pocket roll through upper and lower guide grooves, and both ends of the bearing block are pressurized to install a hydraulic cylinder to pressurize while preventing the back of the molding during press molding. In the molding machine,
At the rear of the hydraulic cylinder is provided by a pressure forming machine, characterized in that the side support frame is installed to be fixed to the upper frame and the lower frame is supported by the upper pin and the lower pin.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram for explaining the industrial waste recycling method according to the present invention, Figure 2 is a metering and mixer, installed in the storage facility of the industrial waste recycling method of the present invention, pressure supply and pressure molding machine and its Figure 3 is a schematic configuration diagram installed by a cascade arrangement of the lower conveyor, Figure 3 is a granulation system for the granulation is installed in the industrial waste recycling method of the present invention, the mixing facility, the storage facility of the compound, pelletizer and rotary It is a schematic configuration diagram provided by a stepwise arrangement of a rotary cooler, in which a scale generated in a rolling mill is divided into a powder form 12 and a ragged mass 11, It is to be classified by the separation facility, in which the powder-scale scale having a particle diameter of 5 mm or less is discharged in a predetermined amount through the outlet of the lower part of the initial storage facility (15). It is to be conveyed to the secondary vibrating screen 21 through the belt conveyor 16, and the secondary vibrating screen 21 is separated into a powder shape of 5 mm or less in particle size and a lump shape of 5 mm or more in particle size.

The powder scale passing through the secondary vibrating screen 21 (mesh 5mm) falls to the belt conveyor 24 which is connected to the lower portion of the secondary vibrating screen 21, and at this time, the primary grinder 14 The powder pulverized in the) is joined to the belt conveyor 23 and transferred to the cyclo 34, which is a primary storage facility, through a vertical conveyor.

In the secondary vibrating screen 21, the mass of the mass that does not pass through the screen is pulverized again in the secondary grinder 25, wherein the pulverized crushed material is passed through the belt conveyor 26 to the third vibrating screen Transported to (27), the third vibration screen (mesh 5mm) to be sorted again to the powder-scale scale and pulverized agglomeration, the powder shape passing through the screen (mesh 5mm) of the tertiary vibration screen (27) The scale is transferred through the belt conveyor 28 installed in the lower portion of the third vibrating screen 27, and then conveyed through the vertical conveyor 33, the particle diameter did not pass through the screen of the third vibrating screen 27 The mass of 5 mm or more is conveyed to the secondary grinder 25 again through the belt conveyor 29 to perform the grinding operation.

In addition, the scale of the initial lump shape is mechanically introduced into the storage facility 13, and after performing the grinding operation in the first crusher 14 installed below the storage facility, the pulverized crushed material is the first crusher 14 ) Is input to the primary vibrating screen 18 by the belt conveyor 17 installed in the lower part, and the primary vibrating screen 18 is provided with two kinds of screens of 15-25 mm and 5 mm or less, and the mesh 5 mm The powder scale passing through the screen below is joined with the powder scale coming out of the lower portion of the secondary vibrating screen through the belt conveyor 23 installed at the lower portion, and is conveyed through the belt conveyor 31.

In addition, a mass of 25 mm or less of the particle size that does not pass through the screen of 5 mm or less of the mesh is separated into an intermediate layer and supplied to the secondary grinder 25 through the belt conveyor 20 installed at the bottom thereof, and then again. The grinding operation is performed, and the pulverized product as described above is separated into a scale of 5 mm or less in the form of a powder and a scale of agglomerates in the tertiary vibrating screen 27.

In addition, the mass that does not pass through the screen of the mesh 25mm in the primary vibrating screen 18 is conveyed to the yard or storage facility 13 through the belt conveyor 19 installed in the upper portion of the separation network.

At this time, the pulverizer 14, 15 and the vibrating screen (18, 21, 27) as described above, ladle differentiation slag generated in the steel mill can also share the equipment, or operate with a new equipment, usually As such, when the crushing facility is provided in the steel mill, only the powder ladle slag 62 may be transported and directly injected into the storage facility 63.

Subsequently, the powder-like scale having a diameter of 5 mm or less, which is transferred through the vertical conveyor 33 as described above, is introduced into the cyclo 34 which is the main storage facility installed indoors, and the cyclo 34 which is the storage facility. A discharge hopper equipped with a vibration motor is attached to the lower part, and an electric gate and a control gate that can control the discharge amount are attached to the lower part to adjust the amount of scale to be used in the post-treatment process and discharge the scale. A hood is attached to collect steelmaking dust generated at the time, and a sensor for measuring a storage amount is installed at an upper end of the storage facility 34.

The powder ladle slag is classified in a steelmaking factory, and is transported by the ceiling hoist 115 installed outside the workplace and introduced into the initial storage facility 63, and the final storage facility 65 through the vertical conveyor 64. ) And then discharged when needed in later processes.

In addition, even in the case of EAF dust generated in the steelmaking plant, if it is transported by the ceiling hoist 115 installed outside the workplace and introduced into the initial storage facility 48, the final storage facility 50 through the vertical conveyor (49). ) And then discharge when needed in later processes.

In order to produce moldings for recycling the ladle slag 62, the scales 11 and 12, and the steelmaking dust 47, an additive reducing agent 57 is added, and the reducing agent 57 is a final storage facility ( 60, the initial storage facility 58 is transported by the ceiling hoist 115 installed outside the workplace as described above and stored in the final storage facility 60 through the vertical conveyor 59, and then in a later process. Let it out when needed.

In addition, other types of sub-raw materials determined by the use of by-products of the steelmaking plant are introduced into the initial storage facility 53 as described above, and are carried by the ceiling hoist 115 installed outside the workshop. After being stored in the final storage facility 55 through the vertical conveyor 54, it is discharged when needed in later processes.

On the other hand, as described above, a little more dust is generated in the grinder (14, 25) and vibrating screens (18, 21, 27), dust is generated in the belt conveyor, vertical conveyor, initial storage facilities, etc., which transport them. Therefore, a blower is installed at the upper end of each dust generating portion, or sealed to be forcibly discharged by the blower. At this time, the dust passes through the dust collectors 40 and 42, and only the dust is collected inside the dust collectors 40 and 42. Only the remaining clean air is discharged to the outside, and the steelmaking dust dropped inside the steelmaking dust collector is forcibly discharged by a conveyor and a rotary valve at the bottom, and the steelmaking dust collected by the steelmaking dust collector is installed at the lower portion. The belt conveyors 43, 44, and 45 are transported to the scale storage facility 34 or the initial storage facility 48 and transferred to the final storage facility 50.

In the lower part of the storage facility 34 of the scale, the scale required for the use of the recycled goods described later is transferred through the belt conveyor 35, which is a carrier, and the belt conveyor 35 is installed on site. It can be installed in combination of two or more according to the size of the plant and the factory, and the scale conveyed by the belt conveyor 35 can be installed at the top of the integrated structure 113 which has a metering, compounding and molding process by the vertical conveyor 37. The weighing equipment 38 is conveyed to the upper weighing equipment 38. When the weighing equipment reaches a predetermined amount previously designated by an automatic weighing device LOAD CELL installed in the main body, the vertical conveyor 37 and the belt conveyor are set by the metering device and the inverter. (35) By varying the speed of the group to precise weighing, it is possible to prevent the overflow of a large amount of scale from the lower part of the vertical conveyor 37 in advance, and the weighing is completed. It is discharged to the mixer 74, 75 which is the lower process by the automatic discharge | emission gate of the lower part of the surface measuring apparatus 38. As shown in FIG.

In the lower part of the storage facilities (50, 55) of the steelmaking dust (47) and the other 52, using the belt conveyor (51,56) of the amount of steelmaking dust and other additives required for the use of recycled products as a carrier At this time, the belt conveyor (51,56) is installed in combination of two or more according to the installation conditions of the site and the size of the factory, the belt conveyor (51,56) is a mechanical pressure forming process (Briquetting Line) And, it is composed of a process body that must be transported to each pelletizer line (Pelletizer Line). In other words, steelmaking dust must be sent in two manufacturing processes. Therefore, steelmaking dust and other additives carried in the belt conveyors 51 and 56 are primarily weighed, blended, and mechanically press-molded by the vertical conveyor 68. Line) is transferred to the uppermost weighing equipment 69 in the one-piece structure 113, and when the weighing equipment 69 reaches a predetermined amount predetermined by a load cell, By virtue of varying the speed of the vertical conveyor 68 and the belt conveyor (51,67) group by precise weighing to prevent in advance of the large amount of steelmaking dust and other additives in the lower portion of the vertical conveyor (68).

As described above, when the weighing is completed, it is discharged to the mixer (74, 75) of the lower process by the automatic discharge gate installed under the metering equipment (69).

In addition, when the conversion operation is carried out to the belt conveyor 85 which is a transport chain in another process, a pelletizer line, steelmaking dust is metered, compounded, and mechanically formed by a vertical conveyor 86. Of the integrated structure 114, which is transported to the uppermost weighing equipment 87, the weighing equipment 87 reaches a predetermined amount previously specified by the load cell, and the vertical conveyor is set by the inverter and the set value of the weighing apparatus. (86) and belt conveyor (85,67,56) group of variable speed to precise weighing to prevent the overflow of large amount of steelmaking dust in the bottom of the vertical conveyor (86) in advance, and the metering equipment ( 87) It is discharged to the mixer 94 which is a lower process by the automatic discharge gate installed at the lower part.

In the lower portion of the storage facility 60 of the reducing agent 57, which is an additive, the amount of reducing agent required for the use of the recycled product is transferred through the belt conveyor 61, which is a carrier, and the belt conveyor 61 is installed on site. According to the conditions and the size of the factory, two or more units are installed in combination, and the belt conveyor 61, which is a carrier of this part, is transported by a pressing process and a pelletizer line, respectively, as described above. It consists of a process body that must

That is, since the reducing agent has to be sent in two manufacturing processes, the reducing agent conveyed in the belt conveyor 61 or the like is primarily integrated with the vertical conveyor 70 by metering, blending, and mechanical pressure molding process. It is conveyed to the uppermost weighing equipment 71 in the structure 113. When the weighing equipment 71 reaches a predetermined amount predetermined by a load cell, the vertical conveyor 70 is set by the setting value of the weighing device and the inverter. And, by varying the speed of the belt conveyor 61 group by precise metering to prevent in advance the overflow of the reducing agent in a large amount of inflow below the vertical conveyor (70).

As described above, when the weighing is completed, it is discharged to the mixer 74, 75 which is the lower process by the automatic discharge gate installed under the metering equipment 71.

In addition, when the conversion operation is carried out to the belt conveyor 88 which is the transport chain by another granulator process (Pelletizer Line), the reducing agent is metered, compounded, and mechanically formed by the vertical conveyor (Pelletizer Line). It is transported to the uppermost weighing facility 90 in the integrated structure 114, and the weighing facility 90 reaches a predetermined value predetermined by the load cell LOAD CELL, and the vertical conveyor ( 89) and the belt conveyor (61,88) group by varying the speed of precise measurement to prevent the overflow of a large amount of reducing agent in the lower vertical conveyor (89) in advance, and when the measurement is completed in the lower part of the metering facility (90) It is discharged to the mixer 94 which is a lower process by the installed automatic discharge gate.

In addition, the amount of ladle slag required for the use of recycled products under the storage facility 65 of the ladle slag 62 is transferred using a belt conveyor 66, which is a carrier, and the belt conveyor 66 is transported on site. Depending on the installation conditions and the size of the factory, two or more units are installed in combination, and the belt conveyor 66, which is the carrier of this part, must be transported separately by the pressure forming process and the pelletizer line. It consists of a process body.

That is, the ladle slag should be sent to two manufacturing processes, and the ladle slag conveyed from the belt conveyor 66 is first weighed, compounded, and mechanically molded by a vertical conveyor 72. It is transferred to the uppermost weighing equipment 73 in the formula structure 113. When the weighing equipment reaches a predetermined amount predetermined by a load cell, the vertical conveyor 72 and By varying the speed of the group of belt conveyors 66, precise weighing is prevented to prevent the ladle slag from overflowing with a large amount of inflow under the vertical conveyor 72.

As described above, when the weighing is completed, it is discharged to the mixer (74, 75) of the lower process by the automatic discharge gate installed under the metering equipment (73).

In addition, when the conversion operation is carried out to the belt conveyor 91 which is the transport chain by another process, the pelletizer line, the ladle slag is metered, compounded, and mechanically formed by the vertical conveyor 92. It is transported to the uppermost weighing equipment 93 in the integrated structure 114, which reaches the predetermined amount predetermined by the load cell LOAD CELL, and the vertical conveyor by the inverter and the set value of the weighing device. By varying the speed of the 92 and the belt conveyor (66,91) group and precisely weighing to prevent the overflow of the ladle slag in the lower portion of the vertical conveyor (92) in advance, the metering equipment (93) It is discharged to the mixer 94 which is a lower process by the automatic discharge | emission gate installed in the lower part.

Since the main raw material is dried or has a small amount of moisture, and the raw material itself has no compressibility and cohesive force, it is impossible to mechanically compress or mold into granules, so that a small amount of the binder 103 is added to increase the cohesive force of the dried raw material. At this time, the type of binder 103 to be used is used a little injection amount depending on the shape of the molding and the workpiece.

Since the stock solution of the binder 103 has a high viscosity and has a disadvantage in that it solidifies at room temperature, the storage facility 104 of the stock solution is finished with a heat insulating material on the outside, and a heating steam coil or a heat pipe is attached to the inside of the stock solution. By maintaining the proper temperature at all times to lower the viscosity to facilitate the transfer to the concentration controller (105, 106, 107), the concentration controller (105, 106, 107) is attached to the mechanical stirrer, heating steam pipe or heating tube, the concentration regulator ( 105,106,107) The outer surface is finished with heat insulation, and a temperature control device and a liquid level detection device are attached.

In addition, the concentration controller (105, 106, 107) is operated in the amount to transfer the amount available for one or several times of the binder measuring equipment (108, 109, 110) used in the mixer (74, 75, 94) of the mixing process, the measuring equipment (108,109,110) and all transfer pipes are equipped with a heating heat pipe or a heat pipe, and around it is a heat insulating finish, the metering equipment (108, 109, 110) is attached to a measuring device that can set and adjust a certain amount of binder, Easy to draw in and out (mixer).

When the above process is completed, the raw materials and sub-materials which have passed through the respective weighing facilities in the mixers 74, 75 and 94, which are the following processes, are appropriately formulated mechanically in the powder mixers 74, 75 and 94. The process can be installed continuously and batchwise, and the choice of equipment used depends on the amount of moldings and the production time. However, when the mixing process is a batch type, two mixers (74, 75) or a plurality of mixers are installed. The mixing blades are attached to the inside of the mixer in a vertical or horizontal manner, and powders and binders introduced in the above process are most appropriate. Attach multiple agitator blades to one or two axles that can be agitated, and replace the protective liner with a cylinder, bottom, and agitator blades if they are damaged by abrasion inside the cylinder of the mixer (74, 75, 94). It is attached to a fixed shaft and used. And the raw material after stirring attaches the automatic gate which can be discharged to the lower part of the mixer 74,75,94.

When the above compounding process is completed and discharged to the lower portion, it is stored and introduced by the natural drop into the storage facility (76,95).

In the storage facility 76 installed on the mechanical pressure line (Briquetting Line) side, a screw conveyor capable of discharging a certain amount is attached, and the lower part thereof has a compound in the space of two forming rolls that rotate during the operation of the mechanical molding machine 78. In order to fill this up, a pressure supply 77, which is a necessary mechanical pressure device, is installed. Inside the pressure supply 77 is composed of a screw conveyor consisting of a vertical or inclined one axis or two or more axes to maximize the consolidation force during the molding operation of the molding.

At this time, the mechanical molding machine 78 (Briquetting Machine) is, as shown in Figure 4, the raw material inlet 201 introduced from the pressure supply 77, and the lower frame and the upper frame 206 for supporting the entire molding machine Lower frame 207 is installed, and between the rotating shaft and the rotating pocket rolls 203, 202 are respectively installed on both sides, and two bearing blocks 204 at both ends of the two rotating shafts and the rotating pocket rolls 202, 203. 205 is installed through the upper and lower movement guide grooves, both ends of the bearing block (204, 205) is provided with a hydraulic cylinder (212) for pressurizing the pressure while preventing the rearward molding during molding of the molding, At the rear of the hydraulic cylinder 212, side support frames 208 and 209 are supported by the upper pin 210 and the lower pin 211 on the upper frame 206 and the lower frame 207, such as a rotating shaft and a rotating pocket. Back part by pressure of molding when rotating roll To avoid being pushed ever developing into.

In addition, the bearing replacement due to the disassembly, assembly or failure of the molding machine, the rotating pocket roll is not available due to wear, and when replacing, it is easy to disassemble, combine or replace the side support frame 208 (209) (209) When the upper pin 210 is removed, the side support frames 208 and 209 are rotated 90 degrees to the rear so that they are placed horizontally with the lower support frame 207, and thus between the upper and lower support frames 206 and 207. Bearing blocks 204 and 205. The bearing and the rotating shaft and the rotating pocket rolls 202 and 203 fixed and rotated thereon are also easily exited to the rear to facilitate repair and replacement, thereby reducing maintenance costs and replacing time.

The molded article press-molded by the molding machine 78 is compression molded into the rotating roll in which the two axes rotate, and then the product is drawn out to the lower portion of the rotating roll and made of a rubber block or conveyor 79 at the lower portion thereof. The molded product is prevented from being damaged due to the withdrawal acceleration of the rotary roll, and is also raised along the inclined surface and transported to the inclined screen 81 for separating the broken product and the unfinished powder from the complete product line. The inclined screen 81 Select only products of a certain size or more of the molded products in the sorted products are conveyed to the packaging storage facility 84 through the conveyor (83) is packaged as recycled materials to be used in the steel mill.

The incomplete product and powder powder falling down from the inclined screen 81 are transferred to the secondary grinder 25 installed in the grinding process along the conveyor 82, and then crushed again by the vibrating screen 27 again. Subsequently, the raw material is replaced as a raw material, and a part of the product selected by the inclined screen 81 is transferred to a reduction furnace 98, which is a reduction process of iron oxide, for reduction.

Meanwhile, the compound blended in the mixer 94 is temporarily stored in a storage facility installed below the mixer and transferred to the granulator 97 through a belt conveyor 96 by a screw conveyor installed in the storage facility 95. , It is made of granulated granules, not mechanically pressurized molding. At this time, the granulator 97 is connected to one or two granulators 97 due to the capability of the production equipment and is operated. When the pressure molding (Briquetter) also needs to be reduced, it is immediately transferred to the reduction furnace 98, and the scale 12 and the reducing agent 57 are mixed in the reduction furnace 98 having a high temperature of 1200 to 1300 degrees. The granule-shaped molded product is reduced from iron oxide to reduced iron, and a heat source for maintaining a high temperature is directly fired, and the exhaust gas of the reduction furnace can collect a high temperature exhaust gas using a dry heat exchanger. Was cooled to 200 to 250 are also discharged to the dust collector 100.

Steelmaking dust collected by the filter cloth inside the dust collector, the high temperature volatilized crude Zn is recovered, and the air forced into the dry heat exchanger is in the range of about 400 to 700 degrees by heat exchange in the heat exchanger. 98) circulating inside so as to save energy supplied from the outside, and the molded product in the high temperature state passing through the reduction furnace 98 to the product cooler 99 installed in a stepped manner below the outlet of the reduction furnace. After the high temperature granular shaped product is rapidly cooled by the cooling air that is supplied and is forcibly supplied from the outside, the packaging storage facility of the molded product is passed through the belt conveyor 101 installed at the outlet of the cooler 99. It is transferred to 102 and is packed in a packaging container.

In the above process, the metering equipment, mixer, storage facility, molding facility, and reduction furnace and cooler facilities are composed of steps, and two lines are assembled and installed inside the factory for each purpose to make automation for ease of operation. .

On the other hand, as the mechanical pressure molding machine 78, the metering equipment 108, 109 of the binder and the metering equipment 38 of the scale 12, the metering equipment 69 of the steelmaking dust 47, other (52) preliminary weighing equipment (69), the metering equipment 71 of the reducing agent and the metering equipment 73 of the ladle slag are provided on the uppermost layer of the integrated structure 113, and the mixers 74 and 75 are respectively installed on the lower and lower sides thereof. In the lower part of the mixer, the storage facility 76 of the blended raw material, and the screw conveyor at the lower part of the mixer, and a pressure supply 77 and a mechanical pressure molding machine 78 are integrally installed at the lower part of the mixer. Block hull conveyor (79) is installed inside the cascade of integral structure 113 from the uppermost floor to the lower floor, the production of recycled goods can proceed sequentially without clogging stepwise.

As the equipment of the granulator 97 line, which is another molding machine producing equipment, the measuring equipment 110 of the binder, the other 52 of the steelmaking dust 12, the measuring equipment 87 of the preliminary tank, the measuring equipment of the reducing agent 90 ), The ladle slag measuring equipment 93 is installed on the uppermost floor of the integrated structure 114, the mixer 94 is installed below the mixer slag, and the storage material 95 of the mixed raw material is installed below the mixer 94. ), And a screw conveyor is connected to the lower part, and the lower part is provided with one or two horizontal granulators in a horizontal arrangement, and the lower part of the granulator is reduced with iron oxide. Reduction furnace (98) for the lower, the rotary product cooler (99) starting at the lower end of the product outlet of the reduction furnace is installed as one component, the belt conveyor 101 is a carrier of the reduction product at the bottom Terraced work from top to bottom In is installed inside the structure 114, to which the production of the recyclable material be carried out sequentially without clogging in a stepwise manner.

As described above, according to the industrial waste recycling method according to the present invention and the molding apparatus used therein, it is possible to process the waste treated as waste and recycle it to steel mills and other industrial sites, thereby reducing production costs and Enhance the quality of the product, solve environmental problems, and grasp the physical properties of the collected slag, steel dust, and coke, which can be used to make scales. Especially, the ladle slag is agglomerated to prevent parts such as quicklime and fluorspar. It can be used as a substitute for raw materials, and the powdered ladle slag has a low iron oxide content, so it can be used as a secondary raw material for secondary refining as it has excellent desulfurization ability and trapping ability of the contents. The scale and EAF dust, etc., can be used as secondary raw materials for the converter drilling without the need for Was added to the reduction in a high-temperature reduction. There are excellent effects that can be cooled and used as a by-product.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the following claims. Those of ordinary skill will want to know easily.

Claims (5)

The primary grinding process of grinding industrial wastes such as oxides, collected FAF dust and other steelmaking dusts, scales, ladle slag, etc. generated in steel mills and rolling mills, and the primary crushed industrial wastes Secondary crushing process that separates the small lumps having a particle size of 5 mm or more separated in the first separation process into three stages with a relatively large lump shape of about 5 mm or less and a particle diameter of 5 mm or more and a very large lump. And, a separation process of separating the pulverized industrial waste through a vibrating screen, a storage process of transferring and storing the industrial waste separated through the vibrating screen through a belt conveyor, and a cohesive force in forming the stored industrial waste particles. Addition of a binder (Binder) so as to mix through a mixer to mix, and the binder by the above mixing step Industrial waste including a mixture storage step of discharging the blended mixture to the lower side of the mixer, temporarily storing and discharging a certain amount of the mixture, and compression molding the mixture to a predetermined size through a mechanical pressure molding machine installed at the lower side. In the recycling method, Oxide recovered from the steel mill is a secondary separation process in which powdery particles are introduced into a vibrating screen and separated into powdery particles having a particle diameter of 5 mm or less, and lumps having a small particle size of 5 mm or more, without going through a first grinding process. ; Agglomerates of 5 mm or more in diameter selected from the vibrating screen of the secondary separation process are pulverized through a secondary grinding process, and the pulverized product is separated into a powder form and a relatively small mass of 5 mm or more in the vibrating screen. A third separation process for storing each; Transfer chute and vertical Kenvey to various steelmaking dusts generated in steel mills such as ladle slag separated into powder form of 5mm or less in steelmaking plant, scale scale separated from other processes, steelmaking and smelting, etc. A storage step of storing the ladle slag, scale, steelmaking dust, etc., vertically conveyed through the chute and the vertical conveyor; In order to manufacture the stored ladle slag, scale, steelmaking dust, etc. according to the intended use, it is transported through a belt conveyor horizontally and vertically to divide into a briquettier and a pelletizer, and conveys the powdered particles to be transported. Particle automatic weighing process for measuring a certain amount through a log cell which is an automatic meter; A binder supplying step of storing a stock solution of the binder in a blending step of adding and blending the binder, diluting and transporting the binder to a predetermined concentration, and measuring the amount of the binder; The molded article press-molded by the pressing process falls to the buffer conveyor at the bottom of the pressure molding machine, wherein the buffer conveyor separates the molded product and the broken molded product by separating the molded product and the broken molded product at the rear end thereof, and separates the inside of the separated molded product. A drying step of drying to remove moisture; And Condensed granules formed in pelletizer by reducing the reducing agent in a high temperature reduction furnace of 1200 ~ 1300 degrees or more according to the use of recycled products, the cooling step of cooling the high temperature granules reduced in the reduction furnace; Industrial waste recycling method characterized in that. The method of claim 1, wherein the molding process is divided into a mechanical compression molding (Briquetter) and a granulator (Pelletizer) for processing into small particles, each of the industrial waste recycling method characterized in that it has a separate process. The industrial waste recycling method according to claim 1, wherein the metering facility, the mixer, the storage facility, the molding facility, the reduction furnace, and the cooler are configured in a downward step during the above process. The method of claim 1, wherein the automatic weighing step and the compounding step, the mixture storage step after the completion of the compounding step, the granulation step, the reduction step of granules and moldings, the cooling step of cooling the reduced product, etc. Industrial waste recycling method characterized in that disposed downward. The raw material inlet 201 flowing from the pressure supply 77 and the lower frame are provided with an upper frame 206 and a lower frame 207 for supporting the entire molding machine, between which the rotating shaft and the rotating pocket roll 203 ( 202 are installed at both sides, and two bearing blocks 204 and 205 are installed at both ends of the two rotating shafts and the rotating pocket rolls 202 and 203 via upper and lower guide grooves for movement. In the pressure molding machine is provided at both ends of the 204, 205, the hydraulic cylinder 212 is provided to press the pressure while preventing the molding to be pushed backwards, At the rear of the hydraulic cylinder 212, side support frames 208 and 209 are supported to be fixed to the upper frame 206 and the lower frame 207 by the upper pin 210 and the lower pin 211 to be fixed. Press molding machine, characterized in that.

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