Treatment device for chromium slag solidification

Abstract

The treatment device comprises a material mixing box, a box cover is installed on the upper portion of the material mixing box, a material mixing assembly is arranged in the material mixing box, one side of the material mixing box is connected with a crushing box used for crushing chromium slag, slag and metakaolin, crushing rollers are arranged in the crushing box, and a feeding hopper is arranged on the upper portion of the crushing box. The other side of the mixing box is connected with a feeding assembly, and a feeding port of the feeding assembly is connected with a fly ash tank. Chromium slag, metakaolin and coal ash and / or slag are mixed through a mixing box to prepare composite geopolymer solidified / stabilized chromium slag, a crushing box and a coal ash tank are arranged at the feeding end of the mixing box, the crushing box can crush the chromium slag, the metakaolin and the slag, the chromium slag, the metakaolin and the slag can be mixed in the mixing box conveniently, caking in the mixing process is avoided, and the mixing efficiency is improved. And the fly ash tank is matched with the feeding assembly for independent feeding, so that fly ash flying dust is avoided, and large dust on the periphery of the mixing box is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chromium slag solidification treatment, in particular to a treatment device for chromium slag solidification. Background Art

[0002] Chromium slag is a heavy metal hazardous waste. The hexavalent chromium (Cr6+) contained in it is easily soluble and unstable, has strong oxidative toxicity, and can cause damage to human body and crop organisms. The calcium chromate (hexavalent chromium) contained in chromium slag also has strong carcinogenic and mutagenic properties. Chromium slag is mainly produced in the chromium salt industry and the sodium dichromate production process of a few metal chromium enterprises, especially in chromium salt production enterprises using calcium roasting production process. Chromium compounds are one of the main series of inorganic chemical products and are widely used in chemical, light industry, metallurgy, textile, machinery and other industries. The treatment of chromium slag, such as dry reduction, wet reduction, and comprehensive utilization of chromium slag in brick making, calcium magnesium phosphate fertilizer, cast stone, cement additive, glass colorant, sintered ore ironmaking, etc., has achieved certain results. However, these chromium slag treatment technologies all have certain limitations. Some of them are not completely detoxified and have secondary pollution; some of them use less chromium slag, have a long disposal cycle, and are slow in progress; some comprehensive utilization products, such as using chromium slag as cement mineralizer, have unclear impacts on the environment. In addition, the high cost of processing and disposal is also an important factor restricting the management of chromium slag.

[0003] The existing technology also uses slag, fly ash and metakaolin to prepare composite geopolymers to solidify / stabilize chromium slag, which can not only reduce the environmental problems caused by the storage of industrial waste slag, but also effectively prevent the leaching of heavy metal chromium in chromium slag, so as to achieve the purpose of "waste treatment with waste", which is of great significance to environmental protection, effectively control the secondary pollution in the harmless treatment of chromium slag, and make it resource-based and comprehensively utilized in more industries, thereby bringing good social benefits and indirect economic benefits. However, the existing chromium slag treatment mostly uses leaching equipment, which not only consumes leaching liquid, has high cost, and has low recycling rate, but also the leaching equipment is essentially different from the preparation of composite geopolymers. Therefore, there is a need for a device that can be used to solidify chromium slag and metakaolin with slag and / or fly ash. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a treatment device for chromium slag solidification, which solves the problem that the chromium slag treatment device in the prior art requires a leaching liquid, has high cost, and has a low recycling rate and cannot be used for chromium slag solidification treatment.

[0005] The technical solution of the utility model is achieved as follows: a processing device for chromium slag solidification comprises a mixing box, a box cover is installed on the upper part of the mixing box, a mixing assembly is arranged in the mixing box, a crushing box for crushing chromium slag, slag and kaolin is connected to one side of the mixing box, a crushing roller is arranged in the crushing box, and a feeding hopper is arranged on the upper part of the crushing box; a feeding assembly is connected to the other side of the mixing box, and a fly ash tank is connected to the feeding port of the feeding assembly.

[0006] Furthermore, a cover plate is installed on the upper part of the fly ash tank, and a feed pipe is connected to the lower part of the fly ash tank.

[0007] Furthermore, the feeding assembly includes a feed pipe and a feed shaft. The feed pipe is connected to the lower feeding pipe. The upper part of the feed pipe is connected to feed pipe 1, which is connected to the mixing box. The feed shaft is connected to the feed motor, and the feed shaft passes through the feed pipe and is connected to the spiral conveying blade.

[0008] Furthermore, the feed pipe 1 is connected obliquely between the feed pipe member and the mixing box, and a cut-off plate is detachably connected to one side of the feed pipe 1 close to the mixing box.

[0009] Furthermore, an arc-shaped screen plate cooperating with a crushing roller is provided in the crushing box, an inclined drop plate is provided at the bottom of the crushing box, and a second feed pipe corresponding to the drop plate is provided at the lower part of the crushing box, and the second feed pipe is connected to the mixing box.

[0010] Furthermore, the lower part of the crushing box is slidably connected with a connecting rod, one end of which is provided with a pushing plate that cooperates with the blanking plate and the feed pipe, and the other end of the connecting rod extends out of the crushing box and is connected to a limit block, which cooperates with a support plate arranged on the crushing box.

[0011] Furthermore, the crushing roller comprises a roller shaft and an outer shell, the roller shaft is connected to a plurality of evenly distributed support plates, the roller shaft is connected to the outer box through the support plates, and a plurality of crushing roller cutters are connected to the outer wall of the outer shell.

[0012] Furthermore, the mixing assembly includes a stirring shaft, the upper part of which is rotatably connected to the box cover, the stirring shaft extends out of the box cover and is connected to a stirring motor installed on the box cover, and a plurality of stirring blades are provided on the stirring shaft, and the stirring blades are located in the mixing box.

[0013] Furthermore, a glass plate is provided on the box cover, the glass plate is slidably engaged with a limiting plate provided on the box cover, and the glass plate is located on the sampling port of the box cover.

[0014] Furthermore, a material drop pipe is provided at the lower part of the mixing box, and a detachable blocking cover is provided at the lower part of the material drop pipe.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model adopts a mixing box to mix chromium slag, metakaolin with fly ash and / or slag to prepare composite geopolymer solidified / stabilized chromium slag. The feeding end of the mixing box is a crushing box and a fly ash tank. The crushing box can crush the chromium slag, metakaolin and slag to facilitate mixing in the mixing box and avoid agglomeration during mixing. The fly ash tank cooperates with the feeding component to feed separately to avoid fly ash dust and cause large dust around the mixing box.

[0017] 2. A cover plate is provided on the upper part of the fly ash tank to facilitate the addition of fly ash. At the same time, during the feeding process, covering the cover plate can prevent the fly ash tank from flying during the feeding process. The spiral conveying blades transport the fly ash from the bottom to the upper part of the mixing box, further preventing the dust from floating up quickly during the transmission of fly ash. A cut-off plate is provided at the outlet of the feed pipe 1 to prevent the continuous entry of fly ash during the mixing process, and also to prevent the mixed material from entering the feed pipe from the feed pipe 1.

[0018] 3. An arc-shaped screen plate is set in the crushing box to screen the materials and ensure the uniformity of the materials. A push plate is set at the bottom of the crushing box to assist the materials in the crushing box to enter the mixing box. At the same time, the push plate cooperates with the feed pipe 2 to prevent the mixed materials from entering the crushing box from the feed pipe 2 during the mixing process, which affects the mixing effect. Several crushing roller knives are set on the outer wall of the crushing roller to assist in crushing chrome slag, metakaolin and slag, ensure the uniformity of the mixed materials, and prevent larger particles from entering the mixing box, affecting the mixing effect, and then affecting the solidification treatment of the chrome slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a cross-sectional schematic diagram of the crushing roller of the utility model.

[0022] In the figure: 1, discharge pipe, 2, fly ash tank, 3, cover plate, 4, feed pipe fittings, 5, spiral conveying blades, 6, feed shaft, 7, feed motor, 8, feed pipe one, 9, cut-off plate, 10, stirring motor, 11, box cover, 12, glass plate, 13, sampling port, 14, limit plate, 15, feed hopper, 16, crushing box, 17, crushing roller, 17-1, shell, 17-2, roller shaft, 17-3, support plate, 18, crushing roller knife, 19, arc sieve plate, 20, limit block, 21, support plate, 22, connecting rod, 23, discharge plate, 24, feed pipe two, 25, push plate, 26, stirring blades, 27, stirring shaft, 28, mixing box, 29, discharge pipe, 30, blocking cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown, Example 1, a processing device for chromium slag solidification, includes a mixing box 28, a box cover 11 is installed on the upper part of the mixing box 28, a mixing assembly is arranged in the mixing box 28, one side of the mixing box 28 is connected to a crushing box 16 for crushing chromium slag, slag and kaolin, a crushing roller 17 is arranged in the crushing box 16, and a feeding hopper 15 is arranged on the upper part of the crushing box 16; the other side of the mixing box 28 is connected to a feeding assembly, and the feeding port of the feeding assembly is connected to a fly ash tank 2. The utility model adopts a mixing box 28 to mix chromium slag, metakaolin with fly ash and / or frame to prepare composite geopolymer solidified / stabilized chromium slag. The feeding end of the mixing box 28 is a crushing box 16 and a fly ash tank 2. The crushing box 16 can crush the chromium slag, metakaolin and slag to facilitate mixing in the mixing box 28 and avoid agglomeration during mixing. The fly ash tank 2 cooperates with a feeding component to feed separately to avoid fly ash dust and cause large dust around the mixing box 28.

[0025] like Figure 1 As shown, in Example 2, a treatment device for solidifying chromium slag, a cover plate 3 is installed on the upper part of the fly ash tank 2, and a discharge pipe 1 is connected to the lower part of the fly ash tank 2. The cover plate 3 is arranged on the upper part of the fly ash tank 2 to facilitate the addition of fly ash. At the same time, during the feeding process, covering the cover plate 3 can prevent the fly ash tank 2 from raising ash during the feeding process. The bottom plate of the fly ash tank 2 is an inclined plate, and the inclination of the bottom plate is toward the discharge pipe 1, which is convenient for the discharge of the fly ash in the fly ash tank 2. The upper part of the fly ash tank 2 is provided with an inclined feed port, which can facilitate the replenishment of fly ash.

[0026] In this embodiment, the feeding assembly includes a feed pipe 4 and a feed shaft 6. The feed pipe 4 is connected to the lower pipe 1. The feed pipe 4 can be placed vertically or tilted according to the work site. The connection angle between the feed pipe 4 and the lower pipe 1 and the feed pipe 8 is adjusted according to different placement methods. The upper part of the feed pipe is connected with a feed pipe 8, which is connected to the mixing box 28. The feed shaft 6 is connected to the feed motor 7. The feed shaft 6 passes through the feed pipe 4 and is connected to the spiral conveying blade 5. The bolt conveying blade fits the tube wall of the feed pipe 4, and the feed shaft 6 and the feed pipe 4 are connected to form an Archimedean screw through the spiral conveying blade 5. The feed pipe 8 is tiltedly connected between the feed pipe 4 and the mixing box 28, and a baffle is detachably connected to the side of the feed pipe 8 close to the mixing box 28. The spiral conveying blades 5 transport the fly ash from the bottom to the upper part of the mixing box 28, further preventing the dust from floating up quickly during the fly ash transportation process. A cut-off plate 9 is provided at the discharge port of the feed pipe 8 to prevent the continuous entry of fly ash during the mixing process, and also to prevent the mixed material from entering the feed pipe 4 from the feed pipe 8.

[0027] The other structures are the same as those in Example 1.

[0028] like Figure 1 and Figure 2 As shown, embodiment 3 is a treatment device for solidification of chrome slag, wherein the crushing box 16 is provided with an arc-shaped screen plate 19 matched with a crushing roller 17, the bottom of the crushing box 16 is provided with an inclined blanking plate 23, and the lower part of the crushing box 16 is provided with a second feed pipe 24 corresponding to the blanking plate 23, and the second feed pipe 24 is an inclined pipe fitting, and the second feed pipe 24 is connected with a mixing box 28. The lower part of the crushing box 16 is slidably connected with a connecting rod 22, one end of the connecting rod 22 is provided with a push plate 25 matched with the blanking plate 23 and the feed pipe, and the other end of the connecting rod 22 extends out of the crushing box 16 and is connected to a limit block 20, and the limit block 20 is matched with a support plate 21 provided on the crushing box 16, and the limit block 20 is fixed to the support plate 21 by screws. When the push plate 25 is used to push the material, the screws are removed to push the connecting rod 22 to slide back and forth on the hole on the side plate of the crushing box 16. An arc-shaped screen plate 19 is provided in the crushing box 16 to screen the materials and ensure the uniformity of the materials. A push plate 25 is provided at the lower part of the crushing box 16 to assist the materials in the crushing box 16 to enter the mixing box 28. At the same time, the push plate 25 cooperates with the second feed pipe 24 to prevent the mixed materials from entering the crushing box 16 from the second feed pipe 24 during the mixing process, thereby affecting the mixing effect.

[0029] In this embodiment, the crushing roller 17 includes a roller shaft 17-2 and a shell 17-1. The roller shaft 17-2 is connected to a plurality of evenly distributed support plates 17-3. The roller shaft 17-2 is connected to the outer box through the support plates 17-3. The outer wall of the shell 17-1 is connected to a plurality of crushing roller knives 18. The crushing roller knives are two kinds of crushing knives arranged at intervals. The crushing knives and the wall of the crushing box 16 are squeezed to crush the materials. A plurality of crushing roller knives 18 are arranged on the outer wall of the crushing roller 17 to assist in crushing the chrome slag, metakaolin and slag, ensure the uniformity of the mixed materials, and prevent larger particles from entering the mixing box 28, which affects the mixing effect and further affects the solidification treatment of the chrome slag. The crushing roller can also use two parallel roller shafts, both of which are provided with corresponding shells and crushing knives. When two roller shafts are used, the crushing knives on the two roller shafts are used to crush the materials. The crushing roller is connected to a crushing motor, and the crushing motor provides power for the crushing roller.

[0030] The other structures are the same as those in Example 2.

[0031] like Figure 1 As shown in Example 4, a treatment device for chromium slag solidification, the mixing assembly includes a stirring shaft 27, a plurality of stirring blades 26 are arranged on the stirring shaft 27, the stirring blades 26 are located in a mixing box 28, the stirring blades 26 can be selected as fan-shaped plates, and spiral blades can also be used, the fan-shaped plates can be installed vertically or tilted with the stirring shaft 27 according to specific circumstances, and its function is to mix the materials in the mixing box 28, the upper part of the stirring shaft 27 is rotatably connected to the box cover 11, the stirring shaft 27 extends out of the box cover 11 and is connected to the stirring motor 10 installed on the box cover 11. The stirring motor 10 is connected to the stirring shaft 27 through a bevel gear set, and the stirring shaft 27 cooperates with the stirring blades 26 to mix the materials in the mixing box 28, ensure the uniformity of the mixing, and avoid the leaching of heavy metal chromium after mixing.

[0032] In this embodiment, a glass plate 12 is provided on the box cover 11, and the glass plate 12 is slidably engaged with a limit plate 14 provided on the box cover 11, and the glass plate 12 is located on the sampling port 13 of the box cover 11. The sampling port 13 is used for personnel sampling and testing, and a glass is provided at the sampling port 13 to facilitate the staff to observe the mixing state of the materials. A drop pipe 29 is provided at the lower part of the mixing box 28, and a detachable blocking cover 30 is provided at the lower part of the drop pipe 29. The lower part of the mixing box 28 is a conical structure, and the drop pipe 29 is transitionally connected to the conical structure, and the mixed material is discharged from the drop pipe 29. The rotation of the mixing assembly can also be used to assist the mixed material to fall.

[0033] The other structures are the same as those in Example 3.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A treatment device for chromium slag solidification, characterized in that: The invention comprises a mixing box (28), a box cover (11) is installed on the upper part of the mixing box (28), a mixing assembly is arranged in the mixing box (28), one side of the mixing box (28) is connected to a crushing box (16) for crushing chrome slag, slag and metakaolin, a crushing roller (17) is arranged in the crushing box (16), and a feed hopper (15) is arranged on the upper part of the crushing box (16); the other side of the mixing box (28) is connected to a feeding assembly, and the feeding port of the feeding assembly is connected to a fly ash tank (2).

2. The device for treating chromium slag solidification according to claim 1, characterized in that: A cover plate (3) is installed on the upper part of the fly ash tank (2), and a feed pipe (1) is connected to the lower part of the fly ash tank (2).

3. The device for treating chromium slag solidification according to claim 2, characterized in that: The feeding assembly comprises a feeding pipe (4) and a feeding shaft (6); the feeding pipe (4) is connected to the feeding pipe (1); the upper part of the feeding pipe is connected to a feeding pipe 1 (8); the feeding pipe 1 (8) is connected to a mixing box (28); the feeding shaft (6) is connected to a feeding motor (7); and the feeding shaft (6) passes through the feeding pipe (4) and is connected to a spiral conveying blade (5).

4. The device for treating chromium slag solidification according to claim 3, characterized in that: The feed pipe one (8) is connected obliquely between the feed pipe member (4) and the mixing box (28), and a cut-off plate (9) is detachably connected to one side of the feed pipe one (8) close to the mixing box (28).

5. The device for treating chromium slag solidification according to any one of claims 1 to 4, characterized in that: The crushing box (16) is provided with an arc-shaped screen plate (19) cooperating with the crushing roller (17), the bottom of the crushing box (16) is provided with an inclined drop plate (23), the lower part of the crushing box (16) is provided with a second feed pipe (24) corresponding to the drop plate (23), and the second feed pipe (24) is connected to the mixing box (28).

6. The device for treating chromium slag solidification according to claim 5, characterized in that: A connecting rod (22) is slidably connected to the lower part of the crushing box (16); one end of the connecting rod (22) is provided with a pushing plate (25) that cooperates with a blanking plate (23) and a feeding pipe; the other end of the connecting rod (22) extends out of the crushing box (16) and is connected to a limit block (20); the limit block (20) cooperates with a supporting plate (21) provided on the crushing box (16).

7. The device for treating chromium slag solidification according to any one of claims 1 to 4 and 6, characterized in that: The crushing roller (17) comprises a roller shaft (17-2) and an outer shell (17-1); a plurality of evenly distributed support plates (17-3) are connected to the roller shaft (17-2); the roller shaft (17-2) is connected to an outer box via the support plates (17-3); and a plurality of crushing roller cutters (18) are connected to an outer wall of the outer shell (17-1).

8. The device for treating chromium slag solidification according to claim 7, characterized in that: The mixing assembly comprises a stirring shaft (27), the upper portion of which is rotatably connected to the box cover (11), the stirring shaft (27) extending out of the box cover (11) and connected to a stirring motor (10) mounted on the box cover (11), a plurality of stirring blades (26) being provided on the stirring shaft (27), and the stirring blades (26) being located in a mixing box (28).

9. The device for treating chromium slag solidification according to claim 1, characterized in that: A glass plate (12) is provided on the box cover (11), the glass plate (12) is slidably engaged with a limit plate (14) provided on the box cover (11), and the glass plate (12) is located on the sampling port (13) of the box cover (11).

10. The device for treating chromium slag solidification according to claim 1, characterized in that: A material dropping pipe (29) is provided at the lower part of the mixing box (28), and a detachable blocking cover (30) is provided at the lower part of the material dropping pipe (29).

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