Device for crushing and screening ferronickel slag

Abstract

The utility model discloses a device for crushing and screening ferronickel slag, and belongs to the field of slag processing devices. Comprising a hopper, a primary vibrating screen unit receives ferronickel slag aggregate output from a primary crushing unit and screens out ferronickel slag aggregate meeting the specification or exceeding the specification size from the ferronickel slag aggregate, and a distribution unit receives the ferronickel slag aggregate exceeding the specification size screened out from the primary vibrating screen unit and distributes the ferronickel slag aggregate. One part of the distributed ferronickel slag aggregate is conveyed back to the primary crushing unit for further crushing, and the other part of the distributed ferronickel slag aggregate is conveyed to the secondary crushing unit for secondary crushing; and the secondary vibrating screen unit is used for receiving the secondarily crushed ferronickel slag aggregate output from the secondary crushing unit and screening out the ferronickel slag aggregate meeting the specification size from the ferronickel slag aggregate. According to the utility model, the by-product ferronickel slag of the steel plant can be continuously and massively crushed and processed to below the specification size, so that the ferronickel slag can be used as a substitute material of aggregate for concrete, and the consumption of resources is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of slag processing devices, in particular to a device for crushing and screening nickel-iron slag. Background Art

[0002] As we all know, ferronickel slag is a byproduct of alloy steel production, and most of it is discarded. During the ferronickel smelting process, due to the low quality of the raw materials, approximately 30 times the amount of ferronickel slag produced as a byproduct is produced. This ferronickel slag is mainly composed of approximately 55% to 60% silicon dioxide (SiO2) and approximately 32% to 37% magnesium oxide, and also contains small amounts of calcium oxide, iron oxide, and aluminum oxide.

[0003] This by-product, ferronickel slag, can be recycled and used as a raw material for cement manufacturing, civil engineering materials, fine aggregate for concrete, aggregate for runways, etc. However, existing ferronickel slag, a by-product of existing steel mills, cannot be continuously and massively crushed to sizes below standard using existing crushing equipment, making it unusable as a substitute for concrete aggregate. Utility Model Content

[0004] In view of this, the purpose of the present invention is to solve the shortcomings and problems existing in the above-mentioned prior art and to provide a device for crushing and screening nickel-iron slag, which can continuously and in large quantities crush nickel-iron slag, a by-product of steel mills, to a size below the standard so as to be used as an alternative material for concrete aggregate.

[0005] An embodiment of the utility model provides a device for crushing and screening nickel-iron slag, comprising: a hopper, receiving nickel-iron slag aggregate from a steel plant; a primary crushing unit, receiving the nickel-iron slag aggregate from the hopper and crushing it once; a primary vibrating screen unit, receiving the nickel-iron slag aggregate output from the primary crushing unit and screening out nickel-iron slag aggregate that meets or exceeds the specification size; a distribution unit, receiving the nickel-iron slag aggregate that exceeds the specification size screened out from the primary vibrating screen unit and distributing it, a part of the distributed nickel-iron slag aggregate is sent back to the primary crushing unit for further crushing, and the other part of the distributed nickel-iron slag aggregate is sent to the secondary crushing unit for secondary crushing; a secondary vibrating screen unit, receiving the secondary crushed nickel-iron slag aggregate output from the secondary crushing unit and screening out nickel-iron slag aggregate that meets the specification size.

[0006] Furthermore, a vibrating screen is provided at the entrance of the hopper for screening out nickel-ferronickel slag aggregates or impurities larger than 25 mm.

[0007] Furthermore, the primary crushing unit is any one of a cone crusher, an impact crusher or a rotor crusher.

[0008] Furthermore, a first magnetic separation unit is installed between the primary crushing unit and the subsequent primary vibrating screen unit for removing iron from the nickel-ferro slag aggregate.

[0009] Furthermore, the through holes of the screens installed on the primary vibrating screen unit and the secondary vibrating screen unit are set to 3 mm to 5 mm.

[0010] Furthermore, the distribution unit distributes the nickel-iron slag aggregate exceeding the specification size transmitted from the primary vibrating screen unit in a ratio of 7:3, with 7 parts supplied to the secondary crushing unit and 3 parts supplied to the primary crushing unit.

[0011] Furthermore, the secondary crushing unit is any one of a cone crusher, an impact crusher or a rotor crusher.

[0012] Furthermore, a second magnetic separation unit is installed between the distribution unit and the secondary crushing unit for removing iron from the nickel-ferro slag aggregate supplied by the distribution unit.

[0013] Furthermore, the nickel-ferro slag aggregate that meets the specifications and is screened out from the primary vibrating screen unit and the secondary vibrating screen unit is supplied to the tertiary crushing unit for further crushing.

[0014] Furthermore, the tertiary crushing unit is any one of a cone crusher, an impact crusher or a rotor crusher.

[0015] The technical solution provided by the embodiments of the present utility model has the following beneficial effects:

[0016] (1) The utility model sets a hopper to receive nickel-iron slag aggregate from a steel plant, a primary crushing unit receives the nickel-iron slag aggregate from the hopper and crushes it once, a primary vibrating screen unit receives the nickel-iron slag aggregate output from the primary crushing unit and screens out nickel-iron slag aggregate that meets or exceeds the specification size, a distribution unit receives the nickel-iron slag aggregate that exceeds the specification size screened out from the primary vibrating screen unit and distributes it, a part of the distributed nickel-iron slag aggregate is sent back to the primary crushing unit for further crushing, and the other part of the distributed nickel-iron slag aggregate is sent to the secondary crushing unit for secondary crushing, a secondary vibrating screen unit receives the secondary crushed nickel-iron slag aggregate output from the secondary crushing unit and screens out nickel-iron slag aggregate that meets the specification size, and can continuously and massively crush the nickel-iron slag, a by-product of the steel plant, to a size below the specification size, so that the nickel-iron slag can be used as a substitute material for concrete aggregate, thereby reducing resource consumption.

[0017] (2) By setting up a distribution unit to distribute the nickel-iron slag aggregate that exceeds the specification size transmitted from the primary vibrating screen unit in a certain proportion, one part is supplied to the secondary crushing unit, and the other part is supplied to the primary crushing unit. The amount of nickel-iron slag aggregate supplied to the secondary crushing unit can be adjusted, the crushing efficiency of the secondary crushing unit can be improved, and the problem that the secondary crushing unit cannot work normally due to excessive supply of nickel-iron slag aggregate from the primary vibrating screen unit can be overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic structural diagram of a device for crushing and screening nickel-iron slag in an embodiment.

[0019] Figure 2 It is a schematic diagram of the structural position of the primary vibrating screen unit, the secondary vibrating screen unit and part of the conveyor belt in an embodiment of the present utility model.

[0020] Figure 3 It is a schematic diagram of the structural position of the primary vibrating screen unit, the secondary vibrating screen unit and part of the conveyor belt in an embodiment of the present utility model.

[0021] Figure 4 It is a schematic diagram of the screen mesh of the primary vibrating screen unit and the secondary vibrating screen unit according to an embodiment of the present invention.

[0022] Among them, 10-hopper; 10a-vibrating screen; 11-inlet; 20-primary crushing unit; 30-primary vibrating screen unit; 40-distribution unit; 50-secondary crushing unit; 60-secondary vibrating screen unit; 70a-first magnetic separation unit; 70b-second magnetic separation unit; 80-tertiary crushing unit; 110-first conveyor belt; 120-ninth conveyor belt; 130-second conveyor belt; 140-tenth conveyor belt; 150-sixth conveyor belt; 160-seventh conveyor belt; 170-eighth conveyor belt; 180-screen; 190-through hole; 200-third conveyor belt; 210-twelfth conveyor belt; 220-eleventh conveyor belt; 230-fourth conveyor belt; 240-fifth conveyor belt. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will further describe the embodiments of the present invention with reference to the accompanying drawings. The following describes a preferred embodiment of the present invention among multiple possible embodiments, which is intended to provide a basic understanding of the present invention, but is not intended to identify the key or decisive elements of the present invention or to limit the scope of protection to be provided.

[0024] refer to Figures 1 to 4As shown, the utility model provides a device for crushing and screening nickel-iron slag, including a hopper 10 , a primary crushing unit 20 , a primary vibrating screen unit 30 , a distribution unit 40 , a secondary crushing unit 50 and a secondary vibrating screen unit 60 .

[0025] The hopper portion 10 is used to receive the nickel-iron slag aggregates produced as a by-product during the steelmaking process. The nickel-iron slag aggregates are typically 8 mm to 13 mm in size, but may also contain sizes larger than 25 mm or impurities. A first conveyor belt 110 is provided in the hopper portion 10, with a ninth conveyor belt 120 horizontally connected to its upper portion and a second conveyor belt 130 horizontally connected to its lower portion. A vibrating screen 10a is provided at the inlet 11 of the hopper 10 for screening out nickel-iron slag aggregates or impurities larger than 25 mm. The hopper 10 supplies nickel-iron slag aggregates of 8 mm to 13 mm in size to the ninth conveyor belt 120 through the vibrating screen 10a, and the ninth conveyor belt 120 supplies these aggregates to the primary crushing unit 20 on the right.

[0026] The primary crushing unit 20 receives ferronickel slag aggregate from the hopper 10 and performs a primary crushing operation. The primary crushing unit 20 receives ferronickel slag aggregate sized between 8 mm and 13 mm from the ninth conveyor belt 120 and crushes it. The primary crushing unit 20 can be any one of a cone crusher, an impact crusher, or a rotor crusher to improve the crushing efficiency of the ferronickel slag aggregate. Cone crushers, impact crushers, or rotor crushers are well-established technologies and will not be described in detail here.

[0027] A tenth conveyor belt 140 is diagonally mounted at the bottom center of the primary crushing unit 20. A second conveyor belt 130 is horizontally connected to the lower portion of the tenth conveyor belt 140. A first magnetic separation unit 70a is mounted on the second conveyor belt 130 to screen iron from the ferronickel slag aggregate. Specifically, the first magnetic separation unit 70a is mounted between the primary crushing unit 20 and the subsequent primary vibrating screen unit 30 to remove iron from the ferronickel slag aggregate. Magnetic separation units are known in the art. For details, see CN111804433A, CN221288242U, and other publications, and will not be further described here.

[0028] The primary vibrating screen unit 30 is used to screen out ferronickel slag aggregate that meets or exceeds the specifications from the ferronickel slag aggregate crushed by the primary crushing unit 20. The primary vibrating screen unit 30 is installed on the right side of the second conveyor belt 130. The primary vibrating screen unit 30 receives the ferronickel slag aggregate crushed by the primary crushing unit 20 and the ferronickel slag aggregate after iron is screened out by the first magnetic separation unit 70a.

[0029] The ferronickel slag aggregate that meets the specifications after screening from the primary vibrating screen unit 30 is supplied to a sixth conveyor belt 150 connected to the primary vibrating screen unit 30. The sixth conveyor belt 150 is connected to the seventh conveyor belt 160 and the eighth conveyor belt 170 in the subsequent secondary vibrating screen unit 60, and supplies the ferronickel slag aggregate that meets the specifications after screening from the primary vibrating screen unit 30 to the seventh conveyor belt 160 and the eighth conveyor belt 170. In addition, the ferronickel slag aggregate that meets the specifications after screening from the primary vibrating screen unit 30 can be further crushed by the further installed tertiary crushing unit 80 and output as a finished product. The resulting ferronickel slag aggregate is smaller in size and can be used as an alternative material for concrete aggregate, resulting in higher quality concrete. It should be understood that the ferronickel slag aggregate that meets the specifications after screening from the primary vibrating screen unit 30 can be directly output as a processed finished product and used as an alternative material for concrete aggregate.

[0030] The specification is to screen out nickel-iron slag aggregate with a size of 3mm to 5mm or less, so the through holes 190 of the screen 180 installed on the primary vibrating screen unit 30 are preferably set to be 3mm to 5mm or less. The vibrating screen is a mature existing technology and will not be described in detail here.

[0031] The tertiary crushing unit 80 can be any one of a cone crusher, an impact crusher or a rotor crusher to improve the crushing efficiency of the nickel-iron slag aggregate. Cone crushers, impact crushers or rotor crushers are mature existing technologies and will not be described in detail here.

[0032] The oversized ferronickel slag aggregate screened from the primary vibrating screen unit 30 is conveyed via the third conveyor belt 200. The distribution unit 40 receives and distributes the oversized ferronickel slag aggregate screened from the primary vibrating screen unit 30. The distribution unit 40 is mounted on the left side of the third conveyor belt 200. It receives the oversized ferronickel slag aggregate screened from the primary vibrating screen unit 30 and distributes it in a 7:3 ratio, supplying 3 parts of the ferronickel slag aggregate to the twelfth conveyor belt 210 connected to the upper portion of the third conveyor belt 200. The twelfth conveyor belt 210 then resupplies the 3 parts of the ferronickel slag aggregate to the primary crushing unit 20 for re-crushing. Furthermore, the 7 parts of ferronickel slag aggregate distributed by the distribution unit 40 are conveyed to the subsequent secondary crushing unit 50 via the eleventh conveyor belt 220 connected to the third conveyor belt 200.

[0033] In this way, the distribution unit 40 distributes the nickel-iron slag aggregate that exceeds the specification size transmitted from the primary vibrating screen unit in a ratio of 7:3, with 7 parts supplied to the secondary crushing unit 50 and 3 parts supplied to the primary crushing unit 20, so as to adjust the amount of nickel-iron slag aggregate supplied to the secondary crushing unit 50, improve the crushing efficiency of the secondary crushing unit 50, and overcome the problem that the secondary crushing unit 50 cannot work normally due to excessive supply of nickel-iron slag aggregate from the primary vibrating screen unit 30.

[0034] In a preferred embodiment, the distribution unit 40 is an inclined pipe, the pipe inlet of which is connected to the end of the third conveyor belt 200. The pipe outlet is divided by a partition according to the pipe area into a first outlet and a second outlet in a ratio of 7:3. The first outlet is connected to the front end of the eleventh conveyor belt 220 located below, and the second outlet is connected to the front end of the twelfth conveyor belt 210 located below. It should be understood that in other embodiments, the distribution unit 40 can also supply the oversized ferronickel slag aggregate conveyed from the primary vibrating screen unit to the secondary crushing unit 50 and the primary crushing unit 20 in other ratios, such as 6:4 or 5:5.

[0035] The secondary crushing unit 50 is installed on the left side of the eleventh conveyor belt 220 connected to the distribution unit 40. The secondary crushing unit 50 can be any one of a cone crusher, an impact crusher, or a rotor crusher to improve the crushing efficiency of the nickel-iron slag aggregate. Cone crushers, impact crushers, or rotor crushers are mature existing technologies and will not be described in detail here.

[0036] The eleventh conveyor belt 220 is mounted with a second magnetic separation unit 70b for screening iron from the ferronickel slag aggregate supplied by the distribution unit 40. Specifically, the second magnetic separation unit 70b is mounted between the distribution unit 40 and the secondary crushing unit 50 for removing iron from the ferronickel slag aggregate supplied by the distribution unit 40. Magnetic separation units are known in the art, and their configurations can be found in CN111804433A, CN221288242U, and are not described in detail here.

[0037] The secondary vibrating screen unit 60 is used to screen out the ferronickel slag aggregate that meets or exceeds the specification size from the secondary crushed ferronickel slag aggregate supplied by the secondary crushing unit 50. The secondary vibrating screen unit 60 is connected to the fourth conveyor belt 230 installed on the secondary crushing unit 50 and the sixth conveyor belt 150 installed horizontally below the fourth conveyor belt 230. In addition, the secondary vibrating screen unit 60 is installed with a fifth conveyor belt 240, a seventh conveyor belt 160 and an eighth conveyor belt 170. The secondary vibrating screen unit 60 is used to screen out the ferronickel slag aggregate that meets or exceeds the specification size from the secondary crushed ferronickel slag aggregate supplied by the secondary crushing unit 50. The secondary vibrating screen unit 60 is installed at the bottom of the secondary crushing unit 50 and is connected to the right side of the fourth conveyor belt 230 and the fifth conveyor belt 240 installed horizontally below the fourth conveyor belt 230. The lower portion of the secondary vibrating screen unit 60 is equipped with a seventh conveyor belt 160 and an eighth conveyor belt 170. The nickel-iron slag aggregate that meets the specifications and is screened out from the secondary vibrating screen unit 60 is transported by the seventh conveyor belt 160 and the eighth conveyor belt 170 connected to the lower portion of the secondary vibrating screen unit 60. In addition, the nickel-iron slag aggregate that meets the specifications and is transported on the seventh conveyor belt 160 and the eighth conveyor belt 170 can be further crushed by the further installed tertiary crushing unit 80 and then output as a finished product. The obtained nickel-iron slag aggregate is smaller in size and can be used as an alternative material for concrete aggregate, thereby producing better quality concrete. It should be understood that the nickel-iron slag aggregate that meets the specifications and is screened out from the secondary vibrating screen unit 60 can be directly output as a processed finished product and used as an alternative material for concrete aggregate.

[0038] The specification is to screen out nickel-iron slag aggregate with a size of 3mm to 5mm or less. Therefore, the through holes 190 of the screen 180 installed on the secondary vibrating screen unit 60 are preferably set to be 3mm to 5mm or less. Vibrating screens are mature existing technology and will not be described in detail here.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for crushing and screening nickel iron slag, comprising: hopper, which receives ferronickel slag aggregate from the steel mill; The primary crushing unit receives the nickel-iron slag aggregate from the hopper and performs the primary crushing; The primary vibrating screen unit receives the nickel-iron slag aggregate output from the primary crushing unit and screens out the nickel-iron slag aggregate that meets or exceeds the specification size; It is characterized by further comprising: The distribution unit receives the nickel-iron slag aggregate that exceeds the specification size screened by the primary vibrating screen unit and distributes it. A part of the distributed nickel-iron slag aggregate is sent back to the primary crushing unit for further crushing, and the other part of the distributed nickel-iron slag aggregate is sent to the secondary crushing unit for secondary crushing; The secondary vibrating screen unit receives the secondary crushed ferronickel slag aggregate output from the secondary crushing unit and screens out ferronickel slag aggregate that meets the specification size.

2. The device for crushing and screening ferronickel slag as claimed in claim 1, characterized in that: A vibrating screen is provided at the inlet of the hopper for screening out nickel-ferronickel slag aggregates or impurities larger than 25 mm.

3. The device for crushing and screening ferronickel slag as claimed in claim 1, characterized in that: The primary crushing unit is any one of a cone crusher, an impact crusher or a rotor crusher.

4. The device for crushing and screening ferronickel slag as claimed in claim 1, characterized in that: A first magnetic separation unit is installed between the primary crushing unit and the subsequent primary vibrating screen unit for removing iron from the nickel-ferro slag aggregate.

5. The device for crushing and screening ferronickel slag according to claim 1, wherein: The passing holes of the screens installed on the primary vibrating screen unit and the secondary vibrating screen unit are set to 3 mm to 5 mm.

6. The device for crushing and screening ferronickel slag according to claim 1, characterized in that: The distribution unit distributes the nickel-iron slag aggregate exceeding the specification size transmitted from the primary vibrating screen unit in a ratio of 7:3, with 7 parts supplied to the secondary crushing unit and 3 parts supplied to the primary crushing unit.

7. The device for crushing and screening ferronickel slag according to claim 1, wherein: The secondary crushing unit is any one of a cone crusher, an impact crusher or a rotor crusher.

8. The device for crushing and screening ferronickel slag according to claim 1, wherein: A second magnetic separation unit is installed between the distribution unit and the secondary crushing unit, and is used to remove iron from the nickel-ferro slag aggregate supplied by the distribution unit.

9. The device for crushing and screening ferronickel slag according to claim 1, wherein: The nickel-iron slag aggregate that meets the specifications and is screened out from the primary vibrating screen unit and the secondary vibrating screen unit is supplied to the tertiary crushing unit for further crushing.

10. The device for crushing and screening ferronickel slag according to claim 9, characterized in that: The tertiary crushing unit is any one of a cone crusher, an impact crusher or a rotor crusher.

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