Flue deironing system of rotary hearth furnace

Abstract

The utility model provides an iron removal system for a flue of a rotary hearth furnace. The iron removal system comprises the flue, a first electromagnet, a second electromagnet, a first baffle and a second baffle, the first electromagnet is fixedly connected with the second electromagnet, a first through hole and a second through hole are formed in the flue, the first electromagnet is arranged in the first through hole in a sliding mode, the second electromagnet is arranged in the second through hole in a sliding mode, and the length of the first electromagnet and the length of the second electromagnet are both larger than the distance between the first through hole and the second through hole. The first baffle is detachably installed outside the flue corresponding to the first through hole, and the second baffle is detachably installed outside the flue corresponding to the second through hole. According to the utility model, magnetic small iron particles are removed before flue gas enters a dust removal system, so that the grade of recovered zinc oxide is increased, the small iron particles can be recovered, and the device is more environment-friendly.

Description

Technical Field

[0001] The utility model relates to the field of rotary hearth furnace solid waste treatment, in particular to an iron removal system for the flue of a rotary hearth furnace. Background Technique

[0002] The main purpose of the rotary hearth furnace solid waste treatment process is to produce metallized pellets and recover zinc oxide, realizing the circular and efficient utilization of solid waste in steel plants. However, there are some small magnetic iron particles in the flue gas of the rotary hearth furnace. These small particles will eventually be captured by the dust removal system and enter the zinc oxide powder, affecting the quality of zinc oxide recovered by the rotary hearth furnace. At the same time, this part of the magnetic iron is not well reused. Content of the Utility Model

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides an iron removal system for the flue of a rotary hearth furnace, which includes a flue, a first electromagnet, a second electromagnet, a first baffle and a second baffle.

[0004] The first electromagnet is fixedly connected to the second electromagnet. There are a first through hole and a second through hole on the flue. The first electromagnet is slidably arranged in the first through hole, and the inner contour of the first through hole is larger than the outer contour of the first electromagnet. The second electromagnet is slidably arranged in the second through hole, and the inner contour of the second through hole is larger than the outer contour of the second electromagnet. The lengths of the first electromagnet and the second electromagnet are both greater than the distance between the first through hole and the second through hole.

[0005] The inner contour of the first baffle is adapted to the outer contour of the first electromagnet. The outer contour of the first baffle is larger than the inner contour of the first through hole. The first baffle is detachably installed at the position corresponding to the first through hole outside the flue for closing the gap between the first electromagnet and the first through hole. The inner contour of the second baffle is adapted to the outer contour of the second electromagnet. The outer contour of the second baffle is larger than the inner contour of the second through hole. The second baffle is detachably installed at the position corresponding to the second through hole outside the flue for closing the gap between the second electromagnet and the second through hole.

[0006] By pushing one of the electromagnets into the flue, the two ends are respectively sealed by the first baffle and the second baffle. Start the electromagnet, so that the small iron particles in the flue gas are adsorbed on the electromagnet. When a certain amount is reached, remove the baffle corresponding to the electromagnet, push the electromagnet out of the flue, push the other electromagnet into the flue, then clean the electromagnet and install the baffle, and continue to adsorb the iron small particles in the flue gas.

[0007] Furthermore, the cross-section of the flue is circular or rectangular, and the first through hole and the second through hole are symmetrically arranged on both sides of the geometric center of the cross-section of the flue, so that the electromagnet is arranged at the center position of the flue during use, increasing the adsorption effect.

[0008] Furthermore, the cross-sectional shapes of the first electromagnet and the second electromagnet are the same.

[0009] Further, the cross-sections of the first electromagnet and the second electromagnet are rectangular or oval. The rectangular electromagnet is convenient to manufacture, and the oval electromagnet has a better adsorption effect.

[0010] Further, the first through hole and the second through hole have the same shape.

[0011] Further, the first electromagnet and the second electromagnet have the same length.

[0012] Further, the cross-section of the flue is circular, and the ratio of the length L of the first electromagnet and the second electromagnet to the radius r of the flue is L / r = 2.4 - 2.8.

[0013] Further, the ratio of the thickness h of the first electromagnet and the second electromagnet to the radius r of the flue is h / r = 0.15 - 0.25.

[0014] Further, the first baffle and the second baffle are made of wear-resistant ceramics.

[0015] Further, the first baffle and the second baffle are in contact with the side surface of the flue and are adapted to the outer contour of the flue, increasing the sealing effect.

[0016] Before the flue gas enters the dust removal system, the present utility model removes the small magnetic iron particles. On the one hand, it increases the grade of the recovered zinc oxide, and on the other hand, it can also recover the small iron particles, which is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the first electromagnet of the present utility model located in the flue;

[0019] Figure 2 It is a schematic diagram of the second electromagnet of the present utility model located in the flue;

[0020] Figure 3 It is a schematic diagram of the oval electromagnet in the present utility model;

[0021] In the figure: 1, flue; 2, first electromagnet; 3, second electromagnet; 4, first baffle; 5, second baffle; 6, first through hole; 7, second through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] See Figure 1 、 Figure 2 For the iron removal system of this embodiment, it includes a flue 1, a first electromagnet 2, a second electromagnet 3, a first baffle 4 and a second baffle 5. The first baffle 4 and the second baffle 5 are made of wear-resistant ceramics.

[0024] The first electromagnet 2 is fixedly connected to the second electromagnet 3. The flue 1 is provided with a first through hole 6 and a second through hole 7. The first electromagnet 2 is slidably arranged in the first through hole 6, and the inner contour of the first through hole 6 is larger than the outer contour of the first electromagnet 2. The second electromagnet 3 is slidably arranged in the second through hole 7, and the inner contour of the second through hole 7 is larger than the outer contour of the second electromagnet 3. The lengths of the first electromagnet 2 and the second electromagnet 3 are both greater than the distance between the first through hole 6 and the second through hole 7.

[0025] The inner contour of the first baffle 4 is adapted to the outer contour of the first electromagnet 2, and the outer contour of the first baffle 4 is larger than the inner contour of the first through hole 6. The first baffle 4 is detachably installed outside the flue 1 at the position corresponding to the first through hole 6 for closing the gap between the first electromagnet 2 and the first through hole 6. The inner contour of the second baffle 5 is adapted to the outer contour of the second electromagnet 3, and the outer contour of the second baffle 5 is larger than the inner contour of the second through hole 7. The second baffle 5 is detachably installed outside the flue 1 at the position corresponding to the second through hole 7 for closing the gap between the second electromagnet 3 and the second through hole 7. Preferably, the sides of the first baffle 4 and the second baffle 5 in contact with the flue 1 are adapted to the outer contour of the flue 1 to increase the sealing effect.

[0026] The cross-section of the flue 1 in this embodiment is circular, and the first through hole 6 and the second through hole 7 are symmetrically arranged on both sides of the geometric center of the cross-section of the flue 1, so that the electromagnets are arranged at the center position of the flue 1 during use to increase the adsorption effect.

[0027] For the convenience of installation, the cross-sectional shapes and lengths of the first electromagnet 2 and the second electromagnet 3 in this embodiment are the same, that is, the external dimensions are the same. Correspondingly, the shapes of the first through hole 6 and the second through hole 7 are the same. Specifically, the ratio of the length L of the first electromagnet 2 and the second electromagnet 3 to the radius r of the flue 1 is L / r = 2.4 - 2.8, and the ratio of the thickness h to the radius r of the flue 1 is h / r = 0.15 - 0.25. The cross-sections of the first electromagnet 2 and the second electromagnet 3 are rectangular or elliptical. The rectangular electromagnet is convenient to manufacture. See Figure 3 and the elliptical electromagnet has a better adsorption effect.

[0028] By pushing one of the electromagnets into the flue 1, both ends are sealed by the first baffle 4 and the second baffle 5 respectively. Start the electromagnet to adsorb the small iron particles in the flue gas of the flue 1 onto the electromagnet. When a certain amount is reached, remove the baffle corresponding to the electromagnet, push the electromagnet out of the flue 1, push the other electromagnet into the flue 1, then cut off the power to clean the electromagnet and install the baffle, and switch to the other electromagnet to continue adsorbing the small iron particles in the flue gas.

[0029] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. A rotary hearth furnace flue iron removal system, characterized in that: It includes a flue, a first electromagnet, a second electromagnet, a first baffle and a second baffle; the first electromagnet is fixedly connected to the second electromagnet, the flue is provided with a first through hole and a second through hole, the first electromagnet can be slidably arranged in the first through hole, the inner contour of the first through hole is larger than the outer contour of the first electromagnet, the second electromagnet can be slidably arranged in the second through hole, the inner contour of the second through hole is larger than the outer contour of the second electromagnet, and the lengths of the first electromagnet and the second electromagnet are both larger than the distance between the first through hole and the second through hole; the inner contour of the first baffle is adapted to the outer contour of the first electromagnet, the outer contour of the first baffle is larger than the inner contour of the first through hole, the first baffle can be detachably installed at a position corresponding to the first through hole outside the flue, and is used to close the gap between the first electromagnet and the first through hole; the inner contour of the second baffle is adapted to the outer contour of the second electromagnet, the outer contour of the second baffle is larger than the inner contour of the second through hole, and the second baffle can be detachably installed at a position corresponding to the second through hole outside the flue, and is used to close the gap between the second electromagnet and the second through hole.

2. The rotary hearth furnace flue iron removal system according to claim 1, characterized in that: The cross section of the flue is circular or rectangular, and the first through hole and the second through hole are symmetrically arranged on both sides of the geometric center of the cross section of the flue.

3. The rotary hearth furnace flue iron removal system according to claim 2, characterized in that: The first electromagnet and the second electromagnet have the same cross-sectional shape.

4. The rotary hearth furnace flue iron removal system according to claim 3, characterized in that: The cross-sections of the first electromagnet and the second electromagnet are rectangular or elliptical.

5. The rotary hearth furnace flue iron removal system according to claim 4, characterized in that: The first through hole and the second through hole have the same shape.

6. The rotary hearth furnace flue iron removal system according to claim 5, characterized in that: The first electromagnet and the second electromagnet have the same length.

7. The rotary hearth furnace flue iron removal system according to claim 6, characterized in that: The cross section of the flue is circular, and the ratio of the length L of the first electromagnet and the second electromagnet to the radius r of the flue is L / r=2.4~2.

8.

8. The rotary hearth furnace flue iron removal system according to claim 7, characterized in that: The ratio of the thickness h of the first electromagnet and the second electromagnet to the radius r of the flue is h / r=0.15~0.

25.

9. The rotary hearth furnace flue iron removal system according to claim 1, characterized in that: The first baffle plate and the second baffle plate are made of wear-resistant ceramics.

10. The rotary hearth furnace flue iron removal system according to claim 1, characterized in that: The first baffle plate and the second baffle plate contact the side surface of the flue and are adapted to the outer contour of the flue.

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