Steel slag energy-saving, environmental protection treatment and comprehensive utilization equipment

Abstract

An energy-saving and environmental protection treatment and comprehensive utilization equipment for steel slag, including a steel slag granulation box body, a hydraulic cylinder hinged to the side of the steel slag granulation box body, a slag inlet door driven by the hydraulic cylinder to open and close, a steam drum device, a steel slag automatic tipping mechanism for carrying a slag ladle and controlling the tipping and slag discharging of the slag ladle, which is installed on the steel slag granulation box body, a steel slag roller press crusher installed on the steel slag granulation box body, an arc-shaped mobile crushing bed installed below the steel slag roller press crusher, a slag chute installed at one end of the mobile crushing bed, a buffer slag hopper, a feeder located below the buffer slag hopper for storing steel slag and capable of uniformly discharging materials, and a scale bucket conveyor located below the discharge port of the feeder, provided with a fog cooling device, a head air extraction interface, and a discharge port. The invention operates safely and reliably, comprehensively utilizes steel slag materials, reduces the greenhouse effect, utilizes waste heat, cools efficiently, and saves energy and protects the environment. It can be widely applied to the field of molten high-temperature steel slag treatment in the metallurgical industry.

Description

Technical Field

[0001] The present invention relates to an energy-saving and environmental protection treatment and comprehensive utilization equipment for steel slag, which can be widely applied to the field of molten high-temperature steel slag treatment in the metallurgical industry. Background Art

[0002] Steel slag is one of the main wastes produced in the production process of iron and steel enterprises. During the iron and steel production process, the output of steel slag is huge. Moreover, the temperature of the produced steel slag is 1400 - 1600 °C, and the molten steel slag contains a large amount of heat energy.

[0003] Currently, for the treatment of steel slag, a thermal soaking process treatment equipment is usually adopted, and a large amount of water is used to cool the molten steel slag. This kind of treatment equipment has a long cycle, and the waste heat of the steel slag can only be recovered by converting it into steam. However, the converted steam has the disadvantages of low temperature and low pressure. If heat exchange is carried out during the treatment process, the efficiency of waste heat utilization will be even lower. Therefore, the traditional technology has problems such as slow cooling speed, low waste heat utilization efficiency, high energy consumption, and environmental pollution.

[0004] Existing steel slag treatment equipment also includes roll pressing and crushing and waste heat pressurized thermal soaking equipment. This kind of equipment is easily affected by high-temperature environments, and its performance drops sharply. Situations such as roll tooth deformation, wear, and fracture will occur, seriously affecting the safe operation of the equipment and production efficiency. The open heat dissipation method is adopted for treating molten steel slag, and the waste heat cannot be recovered. There are risks of pressure and water explosion during the pressure thermal soaking after the steel slag is crushed.

[0005] All of the above traditional steel slag treatment equipment requires a large amount of water resources. After the steel slag comes into contact with water, its activity and stability become poor, and the comprehensive utilization rate is low. A large amount of soot will be generated during the treatment process, causing environmental pollution. Summary of the Invention

[0006] The purpose of the present invention is to provide an energy-saving and environmental protection treatment and comprehensive utilization equipment for steel slag that is safe and reliable in operation, comprehensively utilizes steel slag materials, reduces the greenhouse effect, utilizes waste heat, has efficient cooling, and is energy-saving and environmental protection.

[0007] In order to achieve the above-mentioned purpose, the steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention comprises a steel slag granulation box with a steel slag inlet arranged on one side of the top, an air outlet arranged on the other side of the top, and air inlet pipes arranged on the bottom of both sides, a hydraulic cylinder hinged to the side of the steel slag granulation box, a slag inlet door installed at the steel slag inlet of the steel slag granulation box and driven to switch by the hydraulic cylinder, a steam drum device installed above one side of the steel slag granulation box, a steel slag automatic tilting mechanism installed on the steel slag granulation box, which is arranged below the steel slag inlet of the steel slag granulation box, carries a slag pot and controls the dumping and unloading of slag by the slag pot, a steel slag roller crusher installed on the steel slag granulation box, an arc-shaped mobile crushing bed installed below the steel slag roller crusher, a slag chute installed on one end of the mobile crushing bed, a buffer slag bucket located below the mobile crushing bed and having a prism-shaped box structure for containing high-temperature steel slag, and a steam drum device located below the buffer slag bucket for protecting A feeder that can store slag and discharge it evenly, a bucket conveyor located below the feeder discharge port and equipped with an atomizing cooling device, a head exhaust interface, and a discharge port; the arc-shaped mobile crushing bed includes a base, a plurality of concave guide wheels installed on the base and connected at the centers to form an arc as a whole, an arc-shaped guide rail installed in the concave groove of the concave guide wheel and reciprocating along the arc formed by the concave guide wheel, a mobile bed installed on the arc-shaped guide rail and reciprocating along the arc formed by the concave guide wheel through the arc-shaped guide rail, slag retaining plates arranged on both sides of the mobile bed, heat-insulating and wear-resistant castable material laid between the top surface of the mobile bed and the slag retaining plates on both sides, a bed motor reducer installed on both sides of the base, a bed drive gear connected to the output shaft of the bed motor reducer, and a rack meshing with the gear and installed on the side of the arc-shaped guide rail.

[0008] The steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention comprises a steam drum, a downcomer installed below one end of the steam drum, an upper header installed below the steam drum through a pipeline, a lower header installed on the downcomer, and a membrane water-cooled wall arranged inside a steel slag granulation box and connected to the upper header and the lower header.

[0009] The steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention, the steel slag automatic tilting mechanism comprises a tilting motor reducer installed on the steel slag granulation box, a tilting drive gear connected to the output shaft of the tilting motor reducer, a pin wheel meshing with the tilting drive gear and installed on the steel slag granulation box, two ear shaft seats installed on the steel slag granulation box, a slag pot installed on the ear shafts of the two ear shaft seats, and a lever connected to the pin wheel and driven to rotate by the pin wheel, used to support the slag pot and to flip the slag pot.

[0010] The equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention. For the steel slag roller press crusher, it includes a frame, a lifting oil cylinder vertically installed at the bottom of the frame, two sliding bearing seats hinged to the piston rod of the lifting oil cylinder through pin columns and driven by the lifting oil cylinder to move up and down, two sliding bearings installed on the sliding bearing seats, a crushing motor reducer installed on the frame, a solid shaft at the right end connected to the output shaft of the crushing motor reducer and installed on the sliding bearing, a through-hole shaft at the left end installed on the sliding bearing, a hollow shaft in the middle connected to the through-hole shaft at the left end and the solid shaft at the right end, a hollow roller installed on the hollow shaft in the middle, several crushing roller teeth installed on the outer wall of the hollow roller, and a water inlet and outlet rotary joint installed on the outer side of the through-hole shaft at the left end for water cooling of the hollow roller.

[0011] For the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention, the through-hole shaft at the left end, the hollow shaft in the middle and the solid shaft at the right end form the main shaft.

[0012] For the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention, the feeder includes a feeding box, feeding motor reducers installed on the front and rear side faces of the feeding box, a driving sprocket installed on the output shaft of the feeding motor reducer, a double-chain sprocket driven by the driving sprocket through chain drive, a driven sprocket driven by the double-chain sprocket through chain drive, feeding shafts respectively driven by the double-chain sprocket and the driven sprocket and installed on the feeding box, and feeding dial plates installed on the feeding shafts.

[0013] The working principle of the whole machine of the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention is as follows: During the process of dumping steel slag, the steel slag roller press crusher is started, and the rotation direction of the crushing roller faces the steel slag automatic tipping mechanism. After the slag inlet gate at the steel slag inlet is closed, the movable crushing bed is started to move along an arc towards the steel slag roller press crusher. The molten steel slag is driven by the movable crushing bed to contact the steel slag roller press crusher and is crushed and granulated under the rolling impact of the roller teeth. Through the reasonable matching of the rotation direction and speed of the crushing roller of the steel slag roller press crusher and the moving direction and speed of the movable crushing bed, the functions of rolling crushing and slag pushing and discharging can be realized. When the tangent direction of the bottom roller teeth of the crushing roller rotates to be the same as the moving direction of the crushing bed, it is in the crushing state; when the tangent direction of the bottom roller teeth of the crushing roller rotates to be opposite to the moving direction of the crushing bed, it is in the slag pushing state. At the same time, by lifting the crushing roller, adjusting the contact gap between the roller teeth and the steel slag can control the crushing strength and force, and is also beneficial to enhancing the crushing effect.

[0014] For the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention, for the slag inlet gate, its working principle is: The slag inlet is provided with a hydraulic cylinder to control the opening and closing of the slag inlet gate. The hydraulic cylinder is hinged and fixed on the side of the steel slag granulation box body. The piston rod of the hydraulic cylinder is hinged to the slag inlet gate. When the piston rod extends, the slag inlet gate can be opened, and when the piston rod retracts, the slag inlet gate can be closed.

[0015] The steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention, the steel slag automatic tilting mechanism, its working principle is: the molten steel slag is placed in the slag pot, lifted and moved to the steel slag entrance by the crane, and lowered to the steel slag automatic tilting mechanism through the entrance, and the ear axis and the bottom of the slag pot are respectively placed on the ear axis seat and the lever for support and fixation. The motor reducer is driven by variable frequency, the tilting motor reducer drives the gear to rotate, and the tilting drive gear is meshed with the pin wheel to drive the pin wheel to rotate, and the pin wheel drives the lever to move the bottom of the slag pot, driving the slag pot to flip, and the slag pot rotates and tilts around the center line of the ear axis, and the molten steel slag falls into the mobile crushing bed under the action of flipping and its own gravity. After the slag pot rotates 110°, the steel slag is dumped. The slag pot is restored to an upright position driven by the steel slag automatic tilting mechanism. The crane lifts the slag pot out and turns it away. At this time, the slag inlet door of the steel slag entrance is closed.

[0016] The steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention, the steel slag roller crusher, its working principle is: adopting the crushing motor reducer variable frequency drive, can rotate in both directions, the crushing motor reducer output shaft is directly connected to the main shaft, the main shaft adopts a hollow water-cooling structure, a rotating joint is arranged at one end to allow circulating cooling water to enter, frames and sliding bearing seats are arranged on both sides, the lifting cylinder is installed on the frame, through the lifting action of the piston rod of the lifting cylinder, the sliding bearing seat moves up and down along the frame to drive the main shaft to rise and fall, thereby driving the crushing roller teeth to rise and fall.

[0017] The energy-saving and environmentally friendly steel slag treatment and comprehensive utilization equipment of the present invention, the arc-shaped movable crushing bed, its working principle is: under the power of the double-sided variable frequency motor reducer, the bed driving gear is driven to rotate, the bed driving gear is engaged with the rack, the rack is driven to move, and the movable bed is driven to make an arc-shaped reciprocating motion on the guide wheel.

[0018] The steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention, the bucket conveyor can undertake the high-temperature steel slag discharged by the feeder; the atomizing cooling device atomizes the cooling water and sprays it on the high-temperature steel slag in the conveyance for further cooling. After the steel slag is cooled and conveyed to the head for unloading, it can be transported or stored for use. The large amount of steam generated by the atomizing cooling is led out through the exhaust interface to recover the waste heat or to be condensed and discharged for water removal and dust removal.

[0019] The steel slag energy-saving and environmentally friendly treatment and comprehensive utilization equipment of the present invention, the feeder, its working principle is: driven by a motor reducer, the reducer output sprocket drives the feeder sprocket through a chain to rotate and feed. When stopped, it can prevent the steel slag in the buffer slag bucket from falling; after operation, it can control the steel slag in the buffer slag bucket to be uniformly discharged.

[0020] The equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention is provided with an air inlet connecting pipe through which cooling air can be introduced; an air outlet interface is provided and can be connected to a fan to extract hot air, and after the hot air is dust-removed, it can be supplied to heat users; a maintenance slag cleaning door is provided for maintenance access and mechanical cleaning of large pieces of steel slag that cannot be broken.

[0021] The equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention produces high-temperature steel slag at 500 - 800 °C after the molten steel slag is broken and cooled. The high-temperature steel slag is pushed into a buffer slag hopper under the combined action of a crushing roll and a crushing bed, and then conveyed to a scale bucket conveyor through the action of a feeder. Water is sprayed for cooling through an atomizing cooling device inside the scale bucket conveyor. The steel slag is pulverized under the action of cooling shrinkage stress, phase change stress and chemical reaction expansion force, and is efficiently cooled to below 100 °C. Since the atomized water spray is vaporized by heat, there is no risk of water explosion and it does not affect the activity and stability of the steel slag. Therefore, the operation is safe and reliable, and the cooled steel slag can be comprehensively utilized as building materials. During the process of steel slag crushing, cooling and conveying, it is carried out in a closed manner, without dust pollution, and at the same time, the greenhouse effect is reduced. Therefore, the waste heat and solid waste of steel slag are comprehensively utilized, which is environmentally friendly.

[0022] The equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention: First, during the crushing process of the molten steel slag, radiant heat is released, heating the cold water of the membrane water wall. After the cold water absorbs the radiant heat of the steel slag, steam is generated, and the steam converges into a steam drum for recycling; Second, the cooling air from the air inlet connecting pipe blows directly on the steel slag to generate convective heat transfer, generating high-temperature hot air. The hot air is led out through the air outlet interface at the top and can be used to heat materials or generate steam for recycling; Third, a large amount of steam generated by the atomizing cooling device spraying on the steel slag in the scale bucket conveyor is led out through the head air extraction interface, dust-removed, and then can be supplied to heat users. Therefore, the waste heat of the steel slag is recovered through radiant heat transfer of the membrane water wall, convective heat transfer of the cooling air and heat conduction of the atomized water, and waste heat utilization and energy conservation can be realized.

[0023] In summary, the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in the present invention has the following beneficial effects: safe and reliable operation, comprehensive utilization of steel slag materials, reduction of the greenhouse effect, waste heat utilization, efficient cooling, energy conservation and environmental protection. Description of the Drawings

[0024] The following further describes the present invention in conjunction with the accompanying drawings and their embodiments.

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is Figure 1 a bottom view of

[0027] Figure 3 is Figure 2 a sectional view taken along line A - A in

[0028] Figure 4 is Figure 2 the schematic structural diagram of the steam drum device in

[0029] Figure 5 is Figure 4 the left view of

[0030] Figure 6 is Figure 2 the schematic structural diagram of the steel slag automatic tipping mechanism in

[0031] Figure 7 is Figure 2 the schematic structural diagram of the steel slag roller press crusher in

[0032] Figure 8 is Figure 2 the schematic structural diagram of the arc-shaped mobile crushing bed in

[0033] Figure 9 is Figure 3 the schematic structural diagram of the feeder in

[0034] Figure 10 is Figure 9 the top view of Embodiment

[0035] In Figures 1 to 10In this invention, the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag includes a steel slag granulation box body 1 with a steel slag inlet a arranged on one side of the top, an air outlet interface b arranged on the other side of the top, and air inlet pipes 12 arranged at the bottoms on both sides. There is a hydraulic cylinder 2 hinged to the side of the steel slag granulation box body. An inlet slag gate 3 is installed at the steel slag inlet of the steel slag granulation box body and is driven by the hydraulic cylinder to open and close. A steam drum device 4 is installed above one side of the steel slag granulation box body. A steel slag automatic tipping mechanism 5 is arranged below the steel slag inlet of the steel slag granulation box body, which bears the slag pot and controls the dumping of the slag pot to unload slag, and is installed on the steel slag granulation box body. A steel slag roll crusher 6 is installed on the steel slag granulation box body. An arc-shaped moving crushing bed 7 is installed below the steel slag roll crusher. A slag chute 8 is installed at one end of the moving crushing bed. A buffer slag hopper 9, which is located below the moving crushing bed and is used to hold the high-temperature steel slag and has a frustum-shaped box structure, is arranged below the buffer slag hopper. A feeder 10, which is located below the buffer slag hopper and is used to store the steel slag and can discharge the material evenly, is arranged below the feeder. A scale bucket conveyor 11, which is located below the discharge port of the feeder, is provided with an atomization cooling device 13, a head air extraction interface c, and a discharge port d; The arc-shaped moving crushing bed 7 includes a base 7-1, a number of concave guiding wheels 7-2 installed on the base, whose centers are connected together to form an arc shape as a whole, an arc-shaped guide rail 7-3 installed in the concave groove of the concave guiding wheels and reciprocating along the arc formed by the concave guiding wheels, a moving bed body 7-4 installed on the arc-shaped guide rail and reciprocating along the arc formed by the concave guiding wheels through the arc-shaped guide rail, slag retaining plates 7-5 arranged on both sides of the moving bed body, a heat-insulating and wear-resistant castable 7-6 laid between the top surface of the moving bed body and the slag retaining plates on both sides, a bed body motor reducer 7-7 installed on both sides of the base, a bed body driving gear 7-8 connected to the output shaft of the bed body motor reducer, and a rack 7-9 meshed with the gear and installed on the side of the arc-shaped guide rail.

[0036] For the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in this invention, the steam drum device 4 includes a steam drum 4-1, a downcomer 4-2 installed below one end of the steam drum, an upper header 4-3 installed below the steam drum through a pipeline, a lower header 4-4 installed on the downcomer, and a membrane water wall 4-5 arranged inside the steel slag granulation box body and connected to the upper header and the lower header.

[0037] For the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag in this invention, the steel slag automatic tipping mechanism 5 includes a tipping motor reducer 5-1 installed on the steel slag granulation box body, a tipping driving gear 5-2 connected to the output shaft of the tipping motor reducer, a pinion 5-3 meshed with the tipping driving gear and installed on the steel slag granulation box body, two trunnion seats 5-4 installed on the steel slag granulation box body, a slag pot 5-5 installed on the trunnions of the two trunnion seats, and a lever 5-6 connected to the pinion and driven by it to rotate, which is used to support the slag pot and flip the slag pot.

[0038] The equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag of the present invention. The roll crusher 6 for steel slag includes a frame 6-1, a lifting oil cylinder 6-2 vertically installed at the bottom of the frame, two sliding bearing seats 6-3 which are hinged to the piston rod 6-13 of the lifting oil cylinder through a pin 6-12 and move up and down driven by the lifting oil cylinder, two sliding bearings 6-4 installed on the sliding bearing seats, a crushing motor reducer 6-5 installed on the frame, a right solid shaft 6-6 connected to the output shaft of the crushing motor reducer and installed on the sliding bearing, a left through-hole shaft 6-7 installed on the sliding bearing, a middle hollow shaft 6-8 connected to the left through-hole shaft and the right solid shaft, a hollow roller 6-9 installed on the middle hollow shaft, a plurality of crushing roller teeth 6-10 installed on the outer wall of the hollow roller, and a water inlet and outlet rotary joint 6-11 installed on the outer side of the left through-hole shaft for water cooling of the hollow roller.

[0039] The equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag of the present invention. The left through-hole shaft 6-7, the middle hollow shaft 6-8 and the right solid shaft 6-5 constitute the main shaft.

[0040] The feeder 10 of the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag of the present invention includes a feeding box 10-1, feeding motor reducers 10-2 installed on the front and rear side surfaces of the feeding box, a driving sprocket 10-3 installed on the output shaft of the feeding motor reducer, a double-chain sprocket 10-4 driven by the driving sprocket through a chain 10-8, a driven sprocket 10-5 driven by the double-chain sprocket through a chain drive, feeding shafts 10-6 respectively driven by the double-chain sprocket and the driven sprocket and installed on the feeding box, and a feeding dial 10-7 installed on the feeding shaft.

[0041] Based on the equipment for energy-saving, environmental protection treatment and comprehensive utilization of steel slag of the present invention, the above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, within the scope of the technical solution of the present invention, can make some changes or modifications to form equivalent embodiments of equivalent changes by using the disclosed technical content. However, as long as it does not depart from the technical solution content of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement and improvement of the above embodiments within the spirit and principle of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An energy-saving and environmental protection treatment and comprehensive utilization equipment for steel slag, characterized in that The invention comprises a slag granulating box with a slag inlet on one side of the top, an air outlet on the other side of the top and air inlet pipes on the bottom of both sides, a hydraulic cylinder hinged to the side of the slag granulating box, a slag inlet door installed at the slag inlet of the slag granulating box and driven to open and close by the hydraulic cylinder, a steam drum device installed above one side of the slag granulating box, an automatic slag tipping mechanism installed on the slag granulating box, which is arranged below the slag inlet of the slag granulating box and carries a slag pot and controls the dumping and unloading of slag by the slag pot, a slag roller crusher installed on the slag granulating box, an arc-shaped mobile crushing bed installed below the slag roller crusher, a slag chute installed on one end of the mobile crushing bed, a buffer slag hopper with a prism-shaped box structure located below the mobile crushing bed and containing high-temperature slag, and a feeder located below the buffer slag hopper and capable of evenly discharging the slag. A feeder, a bucket conveyor located below the discharge port of the feeder, provided with an atomizing cooling device, a head exhaust interface, and a discharge port; the arc-shaped mobile crushing bed includes a base, a plurality of concave guide wheels installed on the base and connected at the centers to form an arc as a whole, an arc-shaped guide rail installed in the concave groove of the concave guide wheel and reciprocating along the arc formed by the concave guide wheel, a moving bed installed on the arc-shaped guide rail and reciprocating along the arc formed by the concave guide wheel through the arc-shaped guide rail, slag retaining plates arranged on both sides of the moving bed, a heat-insulating and wear-resistant castable material laid between the top surface of the moving bed and the slag retaining plates on both sides, a bed motor reducer installed on both sides of the base, a bed drive gear connected to the output shaft of the bed motor reducer, and a rack meshing with the gear and installed on the side of the arc-shaped guide rail.

2. The steel slag energy-saving and environmental protection treatment and comprehensive utilization equipment according to claim 1, characterized in that The steam drum device comprises a steam drum, a downcomer installed below one end of the steam drum, an upper header installed below the steam drum through a pipeline, a lower header installed on the downcomer, and a membrane water-cooled wall arranged inside a slag granulation box and connected to the upper header and the lower header.

3. The steel slag energy-saving and environmental protection treatment and comprehensive utilization equipment according to claim 1, characterized in that The automatic slag tilting mechanism comprises a tilting motor reducer installed on the slag granulation box, a tilting driving gear connected to the output shaft of the tilting motor reducer, a pin wheel meshing with the tilting driving gear and installed on the slag granulation box, two ear shaft seats installed on the slag granulation box, a slag pot installed on the ear shafts of the two ear shaft seats, and a lever connected to the pin wheel and driven to rotate by the pin wheel, used to support the slag pot and flip the slag pot.

4. The steel slag energy-saving and environmental protection treatment and comprehensive utilization equipment according to claim 1, characterized in that The described steel slag roller press crusher includes a frame, a lifting oil cylinder vertically installed at the bottom of the frame, two sliding bearing seats hinged to the piston rod of the lifting oil cylinder through pin columns and driven to move up and down by the lifting oil cylinder, two sliding bearings installed on the sliding bearing seats, a crushing motor reducer installed on the frame, a right-end solid rotating shaft connected to the output shaft of the crushing motor reducer and installed on the sliding bearing, a left-end through-hole rotating shaft installed on the sliding bearing, a middle hollow rotating shaft connected to the left-end through-hole rotating shaft and the right-end solid rotating shaft, a hollow roller installed on the middle hollow rotating shaft, a number of crushing roller teeth installed on the outer wall of the hollow roller, and an inlet and outlet water rotating joint installed on the outer side of the left-end through-hole rotating shaft for water cooling of the hollow roller.

5. The steel slag energy-saving and environmental protection treatment and comprehensive utilization equipment according to claim 4, characterized in that, The left-end through-hole rotating shaft, the middle hollow rotating shaft, and the right-end solid rotating shaft constitute the main shaft.

6. The steel slag energy-saving and environmental protection treatment and comprehensive utilization equipment according to claim 1, characterized in that The described feeder includes a feeding box, feeding motor reducers installed on the front and rear side faces of the feeding box, a driving sprocket installed on the output shaft of the feeding motor reducer, a double-chain sprocket driven by the driving sprocket through chain drive, a driven sprocket driven by the double-chain sprocket through chain drive, feeding shafts respectively driven by the double-chain sprocket and the driven sprocket and installed on the feeding box, and feeding dial plates installed on the feeding shafts.

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