Treatment device for reducing harmful elements in fine iron powder

Abstract

The utility model provides a treatment device for reducing harmful elements in fine iron powder, which relates to the technical field of purification of iron powder in machine head ash and comprises a treatment pond with one open side, a baffle plate matched with the open side of the treatment pond, a fixing component for stably limiting the baffle plate on the treatment pond and a hollow air blowing cylinder, a lifting lug connected with a crown block and a plurality of air blowing pipes communicated with the interior of the air blowing cylinder are arranged on the air blowing cylinder; according to the device, air is sequentially blown into fine iron powder in different areas in the treatment pond through multi-point-position movement of the air blowing cylinder, so that water in the fine iron powder can be squeezed out and overflows upwards, and when the water level is higher than the height of the overflow port, the fine iron powder can be separated from the water; in this way, the content of chlorine, potassium and zinc elements contained in the purified fine iron powder can be greatly reduced, then the corrosion probability of a blast furnace body in the subsequent smelting process is effectively reduced, meanwhile, the quality of a smelted product is improved, the purification effect of the fine iron powder is good, and recycling of metal is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of iron powder purification in machine head ash, in particular to a processing device for reducing harmful elements in iron concentrate. Background Art

[0002] Sintering machine head ash: refers to the dust captured by the electrostatic precipitator when the sintering flue gas passes through the large flue during the sintering process.

[0003] Currently, the machine head ash after flotation processing contains 50% iron elements (the machine head ash is in a muddy state and has a moisture content of about 20%). The iron powder in the machine head ash can be recycled for a second time and then returned to the blast furnace of the ironmaking plant for re-smelting. This can reduce costs while realizing the recycling and reuse of iron elements.

[0004] However, the iron powder in the head ash will be discharged into the treatment pool after flotation. The iron powder contains a large amount of chlorine, potassium, zinc and other elements. At this time, chlorine, potassium, zinc and other elements will dissolve in the water and cannot be separated from the iron powder. If these elements are not separated, the blast furnace body will be corroded during the subsequent smelting process. At the same time, the quality of the product after smelting will decline. Therefore, how to effectively reduce the content of chlorine, potassium and zinc in iron powder is an urgent problem to be solved. Utility Model Content

[0005] The purpose of the present invention is to solve the problems raised in the above background technology, and then propose a processing device for reducing harmful elements in iron ore concentrate.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A treatment device for reducing harmful elements in iron ore concentrate includes a treatment pool with an open side, a baffle matched with the open side of the treatment pool, a fixing component for stably limiting the baffle on the treatment pool, and an internal hollow air cylinder. The air cylinder is provided with a lifting lug for connecting to a crown crane and a plurality of air pipes connected to the interior of the air cylinder. The baffle is provided with a plurality of rows of overflow holes at different heights and the overflow holes are matched with sealing members. The air cylinder is connected to an air supply device through a hose.

[0008] This device moves the air blower at multiple points and blows air into the iron ore concentrate in different areas of the treatment pool in succession, so that the water in the iron ore concentrate will be squeezed out and surge upward. When the water level is higher than the height of the overflow port, the iron ore concentrate and the water can be separated. In this way, the content of chlorine, potassium and zinc elements in the purified iron ore concentrate will be greatly reduced, thereby effectively reducing the probability of rusting of the blast furnace body in the subsequent smelting process. At the same time, the quality of the product after smelting is improved, the purification effect of the iron ore concentrate is good, and the recovery and reuse of metals is achieved.

[0009] Furthermore, the blocking member is a magnet, and the baffle is made of metal material.

[0010] The above solution uses magnets to block all overflow outlets below the liquid level of the current batch of iron ore concentrate to prevent the iron ore concentrate from overflowing when no air is blown.

[0011] Furthermore, the fixing assembly includes a fixing plate, a cylinder and a limit block. The fixing plates are symmetrically arranged on both sides of the processing box. Two cylinders are arranged opposite each other on the fixing plates. The cylinders are connected to limit blocks that are in contact with and fit the baffle.

[0012] The above solution achieves positional limitation of the baffle on the treatment tank through a fixing assembly, and facilitates subsequent disassembly.

[0013] Furthermore, the treatment pool is arranged at an inclination.

[0014] The above scheme tilts the treatment pool so that the water that surges upward after the local blowing of the iron ore concentrate is completed will immediately flow to the side of the baffle. When the accumulated water level on one side of the baffle is higher than the overflow port, the iron ore concentrate and water can be separated.

[0015] Furthermore, a mounting plate is provided on the treatment tank, and a non-contact material level sensor is provided on the mounting plate.

[0016] Furthermore, the non-contact material level sensor adopts one of a microwave material level sensor and an ultrasonic material level sensor.

[0017] The above solution can automatically measure the total volume of the iron ore concentrate introduced into the treatment tank through a non-contact material level sensor and feed the results back to the controller. No manual measurement is required. It is only necessary to block the overflow port below the iron ore concentrate liquid level based on the results.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] Compared with the existing technology, the device moves the air blower at multiple points and blows air into the iron ore concentrate in different areas of the treatment pool in succession, so that the water in the iron ore concentrate can be squeezed out and surged upward. When the water level is higher than the height of the overflow port, the iron ore concentrate and the water can be separated. In this way, the content of chlorine, potassium and zinc elements in the purified iron ore concentrate will be greatly reduced, thereby effectively reducing the probability of rusting of the blast furnace body in the subsequent smelting process. At the same time, the quality of the product after smelting is improved, the purification effect of the iron ore concentrate is good, and the metal recovery and reuse is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2For Figure 1 Partial enlarged view of label A in the figure;

[0022] Reference numerals:

[0023] 1. Treatment tank; 2. Blowing cylinder; 21. Lifting lug; 22. Blowing pipe; 23. Hose; 3. Baffle; 31. Overflow hole; 32. Magnet; 4. Fixed plate; 41. Cylinder; 42. Limit block; 51. Mounting plate; 52. Non-contact level sensor. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The present invention will be further described in conjunction with the drawings and embodiments:

[0025] As Figure 1 and Figure 2 shown, a treatment device for reducing harmful elements in iron ore concentrate includes a treatment tank 1 with one side open, a baffle 3 that cooperates with the open side of the treatment tank 1, a fixing component for stably limiting the baffle 3 in the treatment tank 1, and a hollow blowing cylinder 2. The blowing cylinder 2 is provided with a lifting lug 21 connected to a crane and a plurality of blowing pipes 22 communicating with the inside of the blowing cylinder 2. The crane is not shown in the figure. The baffle 3 is provided with a plurality of rows of overflow holes 31 at different heights and a plugging member is fitted on the overflow holes 31. The blowing cylinder 2 is connected to a gas supply device through a hose 23. The gas supply device is not shown in the figure. Specifically, the gas supply device is an air pump. The blowing cylinder 2 is made of corrosion-resistant metal material. The significance of such a design is to reduce the probability of the blowing cylinder 2 shaking during the process of the blowing pipe 22 being immersed in the iron ore concentrate. Its heavier weight enhances the stability.

[0026] Specifically, the plugging member is a magnet 32, and the baffle 3 is made of corrosion-resistant metal material.

[0027] For further refinement of the solution of the embodiment of the present invention, as Figure 1 shown, the fixing component includes a fixed plate 4, a cylinder 41, and a limit block 42. The fixing plates 4 are symmetrically arranged on both sides of the treatment tank 1. Two cylinders 41 are arranged on the fixing plates 4 in a facing manner, and the cylinders 41 are connected with limit blocks 42 that contact and fit the baffle 3.

[0028] It should be noted that both the cylinder 41 and the gas supply device are electrically connected to a controller, and the controller is not shown in the figure.

[0029] The working process of the present invention:

[0030] First, the iron concentrate after flotation is batch-introduced into the treatment tank 1. Before introduction, the stacking height of this batch of iron concentrate in the treatment tank 1 is pre-calculated, and the overflow ports above the iron concentrate liquid level are left unblocked, and the other overflow ports below the iron concentrate liquid level are all blocked by the magnet 32 to avoid the overflow of iron concentrate when not blowing air;

[0031] Immediately, the air blowing cylinder 2 is hoisted and transferred above the treatment tank 1 by the overhead crane, and then the air blowing cylinder 2 is driven to descend so that the air blowing pipe 22 is immersed in the iron concentrate. At this time, an air pressure of 0.8 - 1 MPA is applied through the air supply equipment to blow air into the iron concentrate. Then, due to the action of the air pressure, the water in the iron concentrate will be extruded and surge upward. When the air blowing of a local area in the treatment tank 1 is completed, the overhead crane immediately drives the air blowing cylinder 2 to move to different positions and then blows air into other areas. As the multi-point air blowing process is carried out in sequence, the water level in the treatment tank 1 will gradually rise. When the water level is higher than the height of the overflow port, the separation of the iron concentrate from the water can be achieved immediately. At this time, the dissolved potassium zinc chloride elements in the water can effectively separate from the iron concentrate to achieve the purification of the iron concentrate. During the whole air blowing treatment, the position of the baffle 3 on the treatment tank 1 is limited by the fixing component, that is, the baffle 3 always abuts against the treatment tank 1. When the separation of water is completed, the fixing component automatically releases the position limitation on the baffle 3, and then the baffle 3 can be taken away and the iron concentrate can be transferred by the transfer machine to start the subsequent blast furnace smelting process. The transfer machine is not shown in the figure and belongs to the prior art, and its principle will not be described;

[0032] Compared with the prior art, in this device, the air blowing cylinder moves to multiple positions and then blows air into the iron concentrate in different areas of the treatment tank successively, so that the water in the iron concentrate will be extruded and surge upward. When the water level is higher than the height of the overflow port, the separation of the iron concentrate from the water can be achieved immediately. In this way, the content of potassium zinc chloride elements in the purified iron concentrate will be greatly reduced, thereby effectively reducing the corrosion probability of the blast furnace body during the subsequent smelting process. At the same time, the quality of the product after smelting is improved, the purification effect of the iron concentrate is good, and the recycling of metals is realized.

[0033] In some embodiments, as Figure 1 shown, the treatment tank 1 is inclined; in this embodiment, by setting the treatment tank 1 inclined, the water surging upward after the local air blowing of the iron concentrate will immediately flow toward the side of the baffle 3. When the accumulated water level on the side of the baffle 3 is higher than the overflow port, the separation of the iron concentrate from the water can be achieved. It should be noted that the inclination angle can facilitate the flow of water but will not cause the flow of the iron concentrate, as the iron concentrate itself is relatively heavy.

[0034] In other embodiments, as Figure 1As shown, an installation plate 51 is provided on the treatment tank 1, and a non-contact level sensor 52 is provided on the installation plate 51;

[0035] For further refinement of the above embodiment solution, the non-contact level sensor 52 adopts one of a microwave level sensor or an ultrasonic level sensor; through the non-contact level sensor 52 in this embodiment, the total volume of iron ore concentrate introduced into the treatment tank 1 can be automatically measured and the result can be fed back to the controller, without the need for manual measurement. It only needs to block the overflow port below the iron ore concentrate liquid level according to the result.

[0036] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A treatment device for reducing harmful elements in iron concentrate powder, characterized in that, It includes a treatment tank (1) with one side open, a baffle (3) that mates with the open side of the treatment tank (1), a fixing component for stably limiting the position of the baffle (3) on the treatment tank (1), and a hollow air blowing cylinder (2). The air blowing cylinder (2) is provided with a lifting lug (21) connected to the overhead crane and a number of air blowing pipes (22) communicating with the inside of the air blowing cylinder (2). The baffle (3) is provided with a number of rows of overflow holes (31) of different heights, and the overflow holes (31) are fitted with plugging members. The air blowing cylinder (2) is connected to a gas supply device through a hose (23).

2. The processing device for reducing harmful elements in iron concentrate powder according to claim 1, wherein The plugging member is a magnet (32), and the baffle (3) is made of a metal material.

3. The processing device for reducing harmful elements in iron concentrate powder according to claim 1, characterized in that, The fixing component includes a fixing plate (4), a cylinder (41), and a limiting block (42). Fixing plates (4) are symmetrically arranged on both sides of the treatment tank (1). Two cylinders (41) are arranged opposite to each other on the fixing plate (4), and the cylinders (41) are connected to a limiting block (42) that contacts and fits with the baffle (3).

4. A treatment device for reducing harmful elements in iron concentrate powder according to claim 1, characterized in that, The treatment tank (1) is inclined.

5. The processing device for reducing harmful elements in iron concentrate powder according to claim 1, wherein, An installation plate (51) is provided on the treatment tank (1), and a non-contact level sensor (52) is provided on the installation plate (51).

6. The treatment device for reducing harmful elements in iron concentrate powder according to claim 5, characterized in that, The non-contact level sensor (52) is one of a microwave level sensor or an ultrasonic level sensor.

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