Novel high-pressure roller grinding device for alkaline pellet production

Abstract

The utility model relates to the technical field of roller mills, in particular to a novel high-pressure roller milling device for alkaline pellet production. According to the technical scheme, the device comprises a wet mill, a lifting barrel, a high-pressure roller mill and a base, the wet mill is installed on one side of the upper surface of the base, the lifting barrel is installed in the middle of the base, the high-pressure roller mill is installed on the side, away from the wet mill, of the upper surface of the base, an auger is installed in the lifting barrel, and the outer surface of the lifting barrel is sleeved with a sleeve. An air inlet pipe is installed at the position, close to the lower surface, of the outer surface of the sleeve, and an air outlet pipe is installed at the position, close to the upper surface, of the outer surface of the sleeve. According to the utility model, the conventional ore can be subjected to fine grinding and surface optimization in a wet grinding and high-pressure roller grinding manner, so that the conventional resources are utilized, the purpose of producing the alkaline pellets is achieved, the limitation that only magnetite can be used for producing the alkaline pellets in the past is changed, the variety of the ore for producing the alkaline pellets is widened, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of roller mills, in particular to a novel high-pressure roller mill device for alkaline pellet production. Background Art

[0002] The original purpose of sintering pellets was to prepare high-quality metallurgical charge (for blast furnaces, etc.). Now it has gradually evolved into a way of resource utilization. The original subject direction has also expanded from simple sintering pellets to comprehensive utilization of complex ores, direct reduction electric furnace short process and sintering pellet expert system. Through the agglomeration method of sintering pellets, combined with the process of high-temperature metallurgy, many raw materials with unstable chemical composition and metallurgical properties can be used to produce blast furnace metallurgical charge with a certain particle size composition and strength, stable chemical composition and good metallurgical properties through a series of measures.

[0003] After extensive searching, it was found that a typical new high-pressure roller mill device for alkaline pellet production in the prior art is a high-pressure roller mill disclosed in publication number CN209680199U. This utility model has good rolling effect, significantly improved performance, and reduced manufacturing cost.

[0004] The only ore used for the production of alkaline pellets is magnetite. However, the existing ore used to produce alkaline pellets can easily lead to problems such as low compressive strength of the finished pellets, ring formation in the rotary kiln, and red balls formed on the plates of the ring cooler. Therefore, we propose a new high-pressure roller grinding device for the production of alkaline pellets. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of high-pressure roller grinding device for the production of alkaline pellets, which is capable of finely grinding and surface optimizing existing ores by wet grinding and high-pressure roller grinding, thereby utilizing existing resources and achieving the purpose of producing alkaline pellets, thereby changing the previous limitation that only magnetite can be used for the production of alkaline pellets, broadening the variety of ores for the production of alkaline pellets, and reducing the production cost. It solves the problem that only magnetite can be used as the ore for the production of alkaline pellets, and the existing ore production of alkaline pellets will easily cause low compressive strength of the finished pellets, ring formation in the rotary kiln, and red balls formed on the ring cooler plate.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A new type of high-pressure roller mill device for the production of alkaline pellets includes a wet grinder, a lifting cylinder, a high-pressure roller mill and a base, a wet grinder is installed on one side of the upper surface of the base, a lifting cylinder is installed at the middle position of the base, a high-pressure roller mill is installed on the side of the upper surface of the base away from the wet grinder, an auger is installed inside the lifting cylinder, a sleeve is sleeved on the outer surface of the lifting cylinder, an air inlet pipe is installed on the outer surface of the sleeve near the lower surface, an air outlet pipe is installed on the outer surface of the sleeve near the upper surface, a discharge pipe is installed on the upper surface of the lifting cylinder, a humidity probe is installed on the side of the upper surface of the discharge pipe near the high-pressure roller mill, and a bend is installed at the end of the discharge pipe.

[0007] Preferably, a rotating motor is installed on the lower surface of the lifting cylinder, and the output end of the rotating motor is connected to the end of the auger.

[0008] Preferably, a feed hopper is installed on the outside of the wet grinder, a pulp outlet pipe is installed on the inside of the wet grinder, and the end of the pulp outlet pipe is connected to the outer surface of the lifting cylinder.

[0009] Preferably, a one-way valve is installed on the side of the upper surface of the discharge pipe away from the humidity probe, an exhaust pipe is installed at the end of the one-way valve, and the end of the exhaust pipe is connected to the outer surface of the outlet pipe. After the slurry inside the lifting cylinder is heated, the moisture inside it evaporates and is discharged through the exhaust pipe.

[0010] Preferably, a cylinder is installed on the upper surface of the discharge pipe near the inner side of the humidity probe, a fixed rod is installed at the output end of the cylinder, a ring is installed at the end of the fixed rod, and the ring is sleeved on the outer surface of the humidity probe. When the cylinder works, it drives the ring to move up and down through the fixed rod to scrape off the mineral material adhered to the surface of the humidity probe.

[0011] Preferably, a heat-insulating layer is installed on the outer surface of the sleeve, and the heat-insulating layer plays a role in heat-insulating the sleeve.

[0012] Preferably, an installation groove is provided on the outer surface of the lifting cylinder near the lower surface, a filter is installed inside the installation groove, a baffle is installed on the outer surface of the lifting cylinder near the lower surface, a drain pipe is installed on the outer surface of the baffle, and a collecting tank is installed on the upper surface of the base below the drain pipe. The slurry discharged from the wet grinder enters the interior of the lifting cylinder, and the moisture in the slurry is discharged through the filter.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model achieves the goal of fine grinding and surface optimization of existing ore by wet grinding and high-pressure roller grinding by arranging a wet grinder, a lifting drum and a high-pressure roller grinding machine, thereby utilizing existing resources and achieving the purpose of producing alkaline pellets, thereby changing the limitation that only magnetite can be used to produce alkaline pellets in the past, broadening the variety of ores for producing alkaline pellets, and reducing production costs. The slurry formed after the existing ore enters the wet grinder from the feed hopper enters the lifting drum from the slurry discharge pipe, and the moisture in the slurry is discharged from the filter and falls into the collection tank. The hot exhaust gas from the kiln tail enters the chamber formed by the lifting drum and the sleeve from the air inlet pipe and increases the temperature inside the lifting drum so that the moisture in the slurry inside is evaporated. At the same time, the water vapor inside the lifting drum is discharged from the exhaust pipe, and the humidity of the ore at the position of the discharge pipe is detected by a humidity probe. The ore inside the discharge pipe enters the high-pressure roller grinding machine to complete fine grinding.

[0015] 2. The utility model achieves the effect of scraping off the mineral material adhering to the surface of the humidity probe by setting the cylinder and the ring, thereby ensuring the accuracy of the humidity probe in detecting the humidity of the mineral material. The cylinder works and drives the ring to move up and down through the fixed rod to scrape off the mineral material adhering to the surface of the humidity probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a partial main structural diagram of the lifting cylinder of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure of A;

[0019] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of B.

[0020] Figure numerals: 1. feed hopper; 2. wet grinding mill; 3. slurry discharge pipe; 4. lifting cylinder; 5. high-pressure roller grinding mill; 6. base; 7. collecting tank; 8. air outlet pipe; 9. exhaust pipe; 10. one-way valve; 11. discharge pipe; 12. elbow; 13. auger; 14. casing; 15. insulation layer; 16. air inlet pipe; 17. drain pipe; 18. rotating motor; 19. cylinder; 20. humidity probe; 21. ring; 22. fixing rod; 23. mounting groove; 24. filter; 25. shield. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figures 1 to 4 As shown, the utility model proposes a new type of high-pressure roller mill device for alkaline pellet production, including a wet mill 2, a lifting cylinder 4, a high-pressure roller mill 5 and a base 6. The wet mill 2 is installed on one side of the upper surface of the base 6, and a feed hopper 1 is installed on the outside of the wet mill 2. A slurry pipe 3 is installed on the inside of the wet mill 2, and the end of the slurry pipe 3 is connected to the outer surface of the lifting cylinder 4. The lifting cylinder 4 is installed at the middle position of the base 6. A mounting groove 23 is provided on the outer surface of the lifting cylinder 4 near the lower surface. A filter screen 24 is installed inside the mounting groove 23. A baffle 25 is installed on the outer surface of the lifting cylinder 4 near the lower surface. A drain pipe 17 is installed on the outer surface of the baffle 25. A collecting tank 7 is installed on the upper surface of the base 6 below the drain pipe 17. The upper surface of the base 6 faces away from the wet mill 2 is installed on one side of the lifting cylinder 4, an auger 13 is installed inside the lifting cylinder 4, a rotating motor 18 is installed on the lower surface of the lifting cylinder 4, the output end of the rotating motor 18 is connected to the end of the auger 13, a sleeve 14 is sleeved on the outer surface of the lifting cylinder 4, an air inlet pipe 16 is installed on the outer surface of the sleeve 14 near the lower surface, an air outlet pipe 8 is installed on the outer surface of the sleeve 14 near the upper surface, a discharge pipe 11 is installed on the upper surface of the lifting cylinder 4, a one-way valve 10 is installed on the side of the upper surface of the discharge pipe 11 away from the humidity probe 20, an exhaust pipe 9 is installed at the end of the one-way valve 10, and the end of the exhaust pipe 9 is connected to the outer surface of the outlet pipe 8, a humidity probe 20 is installed on the upper surface of the discharge pipe 11 near the high-pressure roller grinding roller 5, and a bend pipe 12 is installed at the end of the discharge pipe 11.

[0024] The working principle of a new high-pressure roller mill device for alkaline pellet production based on Example 1 is: the existing mineral material enters the wet grinder 2 from the feed hopper 1 to form a slurry that enters the lifting cylinder 4 from the slurry discharge pipe 3, and the moisture in the slurry is discharged from the filter 24 and falls into the collection tank 7. The hot exhaust gas from the kiln tail enters the chamber formed by the lifting cylinder 4 and the sleeve 14 from the air inlet pipe 16 and increases the temperature inside the lifting cylinder 4 so that the moisture in the slurry inside is evaporated. At the same time, the water vapor inside the lifting cylinder 4 is discharged from the exhaust pipe 9, and the humidity of the mineral material at the position of the discharge pipe 11 is detected by the humidity probe 20. The mineral material inside the discharge pipe 11 enters the high-pressure roller mill 5 to complete fine grinding.

[0025] Example 2

[0026] like Figures 1 to 3 As shown, the utility model proposes a new type of high-pressure roller mill device for alkaline pellet production. Compared with Example 1, this embodiment also includes a cylinder 19 installed on the upper surface of the discharge pipe 11 near the inner side of the humidity probe 20, a fixed rod 22 is installed at the output end of the cylinder 19, a ring 21 is installed at the end of the fixed rod 22, and the ring 21 is sleeved on the outer surface of the humidity probe 20, and an insulation layer 15 is installed on the outer surface of the sleeve 14, and the insulation layer 15 plays a role in keeping the sleeve 14 and the lifting cylinder 4 warm.

[0027] In this embodiment, the cylinder 19 works and drives the ring 21 to move up and down through the fixed rod 22 to scrape off the mineral material adhered to the surface of the humidity probe 20, thereby ensuring the accuracy of the humidity probe 20 in detecting the humidity of the mineral material.

[0028] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A novel high-pressure roller mill for producing alkaline pellets, comprising a wet mill (2), a lifting cylinder (4), a high-pressure roller mill (5) and a base (6), characterized in that: A wet grinder (2) is installed on one side of the upper surface of the base (6), a lifting cylinder (4) is installed at the middle position of the base (6), a high-pressure roller mill (5) is installed on the side of the upper surface of the base (6) away from the wet grinder (2), an auger (13) is installed inside the lifting cylinder (4), a sleeve (14) is sleeved on the outer surface of the lifting cylinder (4), an air inlet pipe (16) is installed on the outer surface of the sleeve (14) near the lower surface, an air outlet pipe (8) is installed on the outer surface of the sleeve (14) near the upper surface, a discharge pipe (11) is installed on the upper surface of the lifting cylinder (4), a humidity probe (20) is installed on the side of the upper surface of the discharge pipe (11) near the high-pressure roller mill (5), and a bend pipe (12) is installed at the end of the discharge pipe (11).

2. The novel high pressure roller mill for alkaline pellet production according to claim 1, characterized in that: A rotating motor (18) is installed on the lower surface of the lifting cylinder (4), and the output end of the rotating motor (18) is connected to the end of the auger (13).

3. The novel high pressure roller mill for alkaline pellet production according to claim 1, characterized in that: A feed hopper (1) is installed on the outside of the wet grinder (2), a pulp outlet pipe (3) is installed on the inside of the wet grinder (2), and the end of the pulp outlet pipe (3) is connected to the outer surface of the lifting cylinder (4).

4. The novel high pressure roller mill for alkaline pellet production according to claim 1, characterized in that: A one-way valve (10) is installed on the side of the upper surface of the discharge pipe (11) facing away from the humidity probe (20), an exhaust pipe (9) is installed at the end of the one-way valve (10), and the end of the exhaust pipe (9) is connected to the outer surface of the air outlet pipe (8).

5. The novel high pressure roller mill for alkaline pellet production according to claim 1, characterized in that: A cylinder (19) is installed on the upper surface of the discharge pipe (11) near the inner side of the humidity probe (20), a fixing rod (22) is installed at the output end of the cylinder (19), a circular ring (21) is installed at the end of the fixing rod (22), and the circular ring (21) is sleeved on the outer surface of the humidity probe (20).

6. The novel high pressure roller mill for alkaline pellet production according to claim 1, characterized in that: The outer surface of the sleeve (14) is provided with a heat-insulating layer (15).

7. The novel high pressure roller mill for alkaline pellet production according to claim 1, characterized in that: The outer surface of the lifting cylinder (4) is provided with a mounting groove (23) near the lower surface, a filter screen (24) is installed inside the mounting groove (23), the outer surface of the lifting cylinder (4) is provided with a shield (25) near the lower surface, the outer surface of the shield (25) is provided with a drain pipe (17), and the upper surface of the base (6) is provided with a collecting tank (7) below the drain pipe (17).

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