General pellet rotary kiln body

Abstract

The utility model relates to the technical field of pellet rotary kilns, and discloses a general pellet rotary kiln body which comprises an outer shell, a first refractory brick is arranged at the bottom end in the outer shell, and a second refractory brick is arranged at the top end of the first refractory brick. The mass of each second refractory brick and each first refractory brick in the general pellet rotary kiln body is 10-25 kg, the second refractory bricks and the first refractory bricks are pressed and sintered at high temperature through a large-tonnage press machine, and the second refractory bricks and the first refractory bricks can be interlocked in the circumferential direction and the height direction through groove snap fastener structures according to the working environment characteristics and process requirements of an annular cooler. Hot air is prevented from escaping, the second refractory bricks, the first refractory bricks and the heat preservation layer are coated with the impermeable layers, heat loss can be reduced, energy is saved, consumption is reduced, deformation of the steel shell is delayed, the service life of the shell is prolonged, and the problems that the construction period of a rotary kiln body and an annular cooler structure is long, construction procedures are tedious, and potential safety hazards of replacement and maintenance are large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pelletizing rotary kilns, in particular to a universal pelletizing rotary kiln body. Background Art

[0002] The pelletizing rotary kiln is divided into chain grate, rotary kiln body, ring cooler, and supporting air ducts, etc. It is an indispensable and important equipment for iron and steel metallurgy. The refractory materials used in the general pelletizing rotary kiln body are heat-resistant anchors, refractory castables and refractory prefabricated parts, which will have the following problems:

[0003] First, the construction period of the rotary kiln structure is long, and there are many uncontrollable factors. Different regions, different seasons, different storage locations and storage time of castables. The setting time of castables produced in the same batch needs to be adjusted with the above factors. The error of water addition by different / even the same personnel in the construction process is 0.5-1%, resulting in uneven construction quality of castables from the same manufacturer and the same batch;

[0004] Second, the construction process is cumbersome, firmly welding heat-resistant anchors - applying asphalt paint - supporting formwork - pouring (welding prefabricated parts) - rotating the kiln body, reciprocating until the end of the cycle, but the installation of prefabricated parts in the ring cooler requires additional positioning drilling and secondary correction of the hole position, and the bolts are twisted (locally twisted and broken) and the steel shell structure is damaged due to the hole position deviation;

[0005] Third, during the use of the furnace, the temperature is slowly raised and kept at intervals to discharge the free and combined water of the castable, which takes 10-15 days;

[0006] Fourth, the replacement, maintenance and dismantling of the kiln body cannot be predicted, the safety hazards are great, the removal measures are difficult and the removal period is long.

[0007] Now, a new type of universal pelletizing rotary kiln body is proposed to solve the above-mentioned shortcomings. Utility Model Content

[0008] The utility model aims to provide a universal pelletizing rotary kiln body to solve the problems of long construction period, complicated construction procedures and great potential safety hazards in replacement and maintenance of rotary kiln body structure proposed in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a universal pelletizing rotary kiln body, comprising an outer shell, a first refractory brick is arranged at the bottom end of the inner part of the outer shell, and a second refractory brick is arranged at the top of the first refractory brick, a groove is opened inside the bottom end of the second refractory brick, an insulation layer is fixed on the inner side of the outer shell, and an anti-seepage layer is arranged between the inner side of the insulation layer and the outer sides of the second refractory brick and the first refractory brick.

[0010] Furthermore, convex rings are fixed to the tops of the second refractory brick and the first refractory brick respectively, and the first refractory brick and the second refractory brick are buckled with each other via grooves.

[0011] Furthermore, a plurality of groups of the second refractory bricks are arranged at equal intervals, and the second refractory bricks are interlocked with each other via grooves.

[0012] Preferably, a lower connecting ring is provided at the rear end of the outer shell, an upper connecting ring is provided at the front end of the outer shell, and holes are respectively provided inside on both sides of the rear end of the upper connecting ring and inside on both sides of the front end of the lower connecting ring, connecting bolts are provided at the rear ends of both sides of the upper connecting ring, and connecting nuts are provided at the front ends of both sides of the lower connecting ring.

[0013] Furthermore, the insertion holes penetrate the interior of the lower connecting ring and the upper connecting ring respectively, the rear ends of the connecting bolts penetrate the interior of the upper connecting ring and the lower connecting ring respectively, and the connecting nut is threadedly connected to the outside of the connecting bolt.

[0014] Furthermore, the lower connecting rings and the upper connecting rings are respectively provided in multiple groups on the outside of the outer shell.

[0015] Preferably, a second side cover is provided on the left side of the outer shell, and a first side cover is provided on the right side of the outer shell, fixing bolts are respectively provided on the left side of the second side cover and the right side of the first side cover, a second fixing block is welded and fixed on the left side of the outer shell, and three groups of second fixing blocks are arranged in a circular shape at equal intervals on the left side of the outer shell, a first fixing block is welded and fixed on the right side of the outer shell, and three groups of first fixing blocks are arranged in a circular shape at equal intervals on the right side of the outer shell, threaded holes for fitting with fixing bolts are respectively provided inside the left side of the second fixing block and inside the right side of the first fixing block, and the first side cover and the second side cover are symmetrically arranged about the vertical center line of the outer shell.

[0016] Furthermore, the fixing bolts penetrate through the second side cover and the first side cover respectively, and three groups of the fixing bolts are arranged in a circular manner at equal intervals on the right side of the first side cover and the left side of the second side cover respectively.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the kiln body of the universal pelletizing rotary kiln not only realizes that the adjacent refractory bricks in the axial direction and radial direction have concave-convex structure sealing, which can reduce the penetration and intrusion of hot air and minimize the heat loss, but also saves energy and reduces consumption and prolongs the service life of the steel shell of the rotary kiln, realizes the convenience of external reinforcement of the kiln body structure of the rotary kiln, and realizes the convenience of external anti-collision protection of the kiln body structure;

[0018] (1) The second refractory brick and the first refractory brick are provided with an insulation layer, an outer shell, an anti-seepage layer, a second refractory brick, a first refractory brick and a groove. The mass of the second refractory brick and the first refractory brick is 10-25kg. The bricks are pressed by a large-tonnage press and sintered at high temperature. According to the working environment characteristics and process requirements of the ring cooler, the second refractory brick and the first refractory brick can use the groove snap-on structure in the circumference and height direction, which are interlocked and interlocked layer by layer to prevent hot air from escaping. The second refractory brick and the first refractory brick are coated with an anti-seepage layer together with the insulation layer, which can reduce heat loss, save energy and reduce Consumption, delaying the deformation of the steel shell, thereby extending the service life of the shell. At the same time, the rotary kiln body can be constructed with a bricklaying machine, which is safe and efficient, reduces construction procedures, shortens the construction period, is safe during replacement and maintenance construction, and has a short construction period. The bottom surface of the kiln body has a local axial rupture, personnel evacuate, rotate the kiln body, and complete the removal of old materials by gravity collapse. The ring cooler has an artificial pneumatic pick rupture and then a pry bar is used for removal. The refractory bricks contain almost no moisture, and the furnace only takes 3-5 days to dry. It can be put into (restored) production, shortening the furnace drying time, saving energy consumption, and generating good social and economic benefits;

[0019] (2) By providing an outer shell, a lower connecting ring, a jack, a connecting nut, a connecting bolt and an upper connecting ring, when the rotary kiln body is in use, the lower connecting ring and the upper connecting ring can be fixed to the outer side of the outer shell by connecting bolts and connecting nuts at both ends of the outer shell, respectively. The multiple sets of lower connecting rings and upper connecting rings can be provided to assist in fixing and strengthening the structure outside the outer shell, thereby reducing deformation and damage of the outer shell body due to heat.

[0020] (3) By providing an outer shell, a first side cover, a second side cover, a threaded hole, a second fixing block, a first fixing block and fixing bolts, when the rotary kiln body is in use, the first side cover and the second side cover can be respectively installed and fixed on the first fixing block and the second fixing block on both sides of the outer shell using fixing bolts, and then the second side cover and the first side cover can be used to cover and protect the outside of the rotary kiln body structure from collision, thereby reducing and avoiding damage to the rotary kiln body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0022] Figure 2 For this utility model Figure 1 A is an enlarged structural diagram;

[0023] Figure 3 This is a schematic diagram of the enlarged structure of the lower connecting ring of the utility model when viewed from above;

[0024] Figure 4 It is a schematic diagram of the structure of the first side cover of the utility model when viewed from above.

[0025] In the figure: 1, insulation layer; 2, outer shell; 3, anti-seepage layer; 4, lower connecting ring; 5, jack; 6, second refractory brick; 7, first refractory brick; 8, first side cover; 9, groove; 10, connecting nut; 11, connecting bolt; 12, upper connecting ring; 13, second side cover; 14, threaded hole; 15, second fixing block; 16, first fixing block; 17, fixing bolt. DETAILED DESCRIPTION

[0026] 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.

[0027] Example 1: Please refer to Figure 1-4 A general pelletizing rotary kiln body comprises an outer shell 2, a first refractory brick 7 is arranged at the bottom of the inner part of the outer shell 2, a second refractory brick 6 is arranged at the top of the first refractory brick 7, a groove 9 is opened inside the bottom of the second refractory brick 6, a heat-insulating layer 1 is fixed on the inner side of the outer shell 2, and an impermeable layer 3 is arranged between the inner side of the heat-insulating layer 1 and the outer sides of the second refractory brick 6 and the first refractory brick 7;

[0028] The tops of the second refractory bricks 6 and the first refractory bricks 7 are respectively fixed with convex rings, the first refractory bricks 7 and the second refractory bricks 6 are buckled with each other through grooves 9, and the second refractory bricks 6 are arranged in multiple groups at equal intervals, and the second refractory bricks 6 are buckled with each other through grooves 9;

[0029] Specifically, Figure 1 and Figure 2As shown, the second refractory brick 6 and the first refractory brick 7 are provided, the mass of a single block is 10-25kg, and they are pressed by a large-tonnage press and sintered at high temperature. According to the working environment characteristics and process requirements of the ring cooler, the second refractory brick 6 and the first refractory brick 7 can be used in the circumference and height direction of the groove 9, which are interlocked and interlocked layer by layer to prevent hot air from escaping. The second refractory brick 6 and the first refractory brick 7 are coated with an anti-seepage layer 3 with the insulation layer 1, which can reduce heat loss, save energy and reduce consumption, delay the deformation of the steel shell, and thus extend the service life of the shell. At the same time, the rotary kiln body can be constructed by a bricklaying machine, which is safe and efficient, reduces construction procedures, shortens the construction period, is safe during replacement and maintenance construction, and has a short construction period. , the bottom of the kiln body has a local axial rupture, personnel evacuate, rotate the kiln body, and complete the removal of old materials by gravity collapse. The ring cooler uses an artificial pneumatic pick to break the hole and then removes it with a pry bar. The refractory bricks contain almost no moisture and only take 3-5 days to dry the furnace. They can be put into (restored) production, shorten the drying time, save energy, and produce good social and economic benefits. The structure is stable, avoiding irreversible thermal damage to the steel shell caused by repeated welding and multiple welding points. At the same time, repair the mechanical damage to the steel shell caused by welding point grinding. In the production process, a high-pressure water gun can be used to treat the ring. According to the location, process requirements, and environmental characteristics, the physical and chemical indicators of refractory bricks can be optimized. Mullite, andalusite, zircon, slaked bauxite, micropowder, etc. are used for high-pressure molding and high-temperature firing.

[0030] Embodiment 2: A lower connecting ring 4 is provided at the rear end of the outer shell 2, an upper connecting ring 12 is provided at the front end of the outer shell 2, and holes 5 are respectively provided inside the two sides of the rear end of the upper connecting ring 12 and inside the two sides of the front end of the lower connecting ring 4, and connecting bolts 11 are provided at the rear ends of both sides of the upper connecting ring 12, and connecting nuts 10 are provided at the front ends of both sides of the lower connecting ring 4. The holes 5 penetrate the interiors of the lower connecting ring 4 and the upper connecting ring 12 respectively, and the rear ends of the connecting bolts 11 penetrate the interiors of the upper connecting ring 12 and the lower connecting ring 4 respectively. The connecting nuts 10 are threadedly connected to the outside of the connecting bolts 11, and the lower connecting ring 4 and the upper connecting ring 12 are respectively provided with multiple groups on the outside of the outer shell 2;

[0031] Specifically, Figure 1 and Figure 3 As shown, the lower connecting ring 4 and the upper connecting ring 12 can be fixedly installed on the outside of the outer shell 2 at both ends of the outside of the outer shell 2 by using connecting bolts 11 and connecting nuts 10. By setting up multiple groups of lower connecting rings 4 and upper connecting rings 12, the structure outside the outer shell 2 can be auxiliary fixed and strengthened to reduce deformation and damage of the main body of the outer shell 2 caused by heat.

[0032] Embodiment 3: A second side cover 13 is provided on the left side of the outer shell 2, a first side cover 8 is provided on the right side of the outer shell 2, fixing bolts 17 are provided on the left side of the second side cover 13 and on the right side of the first side cover 8, a second fixing block 15 is welded and fixed on the left side of the outer shell 2, and three groups of the second fixing blocks 15 are arranged in a circular manner at equal intervals on the left side of the outer shell 2, a first fixing block 16 is welded and fixed on the right side of the outer shell 2, and three groups of the first fixing blocks 16 are arranged in a circular manner at equal intervals on the right side of the outer shell 2, threaded holes 14 for fitting with the fixing bolts 17 are respectively provided in the inside of the left side of the second fixing block 15 and the inside of the right side of the first fixing block 16, and the first side cover 8 and the second side cover 13 are symmetrically arranged about the vertical center line of the outer shell 2;

[0033] The fixing bolts 17 penetrate through the second side cover 13 and the first side cover 8 respectively, and three groups of the fixing bolts 17 are arranged in a circular manner at equal intervals on the right side of the first side cover 8 and the left side of the second side cover 13;

[0034] Specifically, Figure 1 and Figure 4 As shown, the first side cover 8 and the second side cover 13 can be respectively installed and fixed on the first fixing block 16 and the second fixing block 15 by using fixing bolts 17 on both sides of the outside of the outer shell 2, and then the second side cover 13 and the first side cover 8 can be used to cover and protect the outside of the rotary kiln body structure from collision. The first side cover 8 and the second side cover 13 can be provided with multiple groups of split protection components on the outside of the outer shell 2, which can avoid the installation of the rotary rotating component and provide anti-collision protection for the rotary kiln body.

[0035] Working principle: When the utility model is in use, the second refractory brick 6 and the first refractory brick 7 can be connected in circumference and height direction by using the groove 9, and the second refractory brick 6 and the first refractory brick 7 can be connected in layers to prevent the hot air from escaping. The second refractory brick 6 and the first refractory brick 7 are coated with the insulation layer 1. The anti-seepage layer 3 can reduce heat loss, save energy and reduce consumption, and delay the deformation of the steel shell, thereby extending the service life of the shell. When the rotary kiln body is used, the lower connecting ring 4 and the upper connecting ring 12 can be fixed on the outer shell 2 at both ends by using the connecting bolts 11 and the connecting nuts 10. After the outer side of the shell 2 is secured, multiple sets of lower connecting rings 4 and upper connecting rings 12 can be used to assist in fixing and strengthening the structure outside the outer shell 2, thereby reducing deformation and damage to the main body of the outer shell 2 caused by heat. When the rotary kiln body is in use, the first side cover 8 and the second side cover 13 can be respectively installed and fixed on the first fixing block 16 and the second fixing block 15 on both sides of the outer side of the outer shell 2 using fixing bolts 17, and the second side cover 13 and the first side cover 8 can be used to cover and protect the outside of the rotary kiln body structure from collision.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A general pelletizing rotary kiln body, comprising an outer shell (2), characterized in that: A first refractory brick (7) is arranged at the bottom end of the outer shell (2), and a second refractory brick (6) is arranged at the top end of the first refractory brick (7), a groove (9) is opened inside the bottom end of the second refractory brick (6), a thermal insulation layer (1) is fixed on the inner side of the outer shell (2), and an anti-seepage layer (3) is arranged between the inner side of the thermal insulation layer (1) and the outer sides of the second refractory brick (6) and the first refractory brick (7).

2. The universal pelletizing rotary kiln body according to claim 1, characterized in that: The top ends of the second refractory brick (6) and the first refractory brick (7) are respectively fixed with convex rings, and the first refractory brick (7) and the second refractory brick (6) are buckled with each other via a groove (9).

3. The universal pelletizing rotary kiln body according to claim 1, characterized in that: The second refractory bricks (6) are arranged in multiple groups at equal intervals, and the second refractory bricks (6) are interlocked with each other via grooves (9).

4. The universal pelletizing rotary kiln body according to claim 1, characterized in that: A lower connecting ring (4) is provided at the rear end of the outer shell (2), and an upper connecting ring (12) is provided at the front end of the outer shell (2). Insertion holes (5) are respectively provided inside the two sides of the rear end of the upper connecting ring (12) and inside the two sides of the front end of the lower connecting ring (4). Connecting bolts (11) are provided at the rear ends of the two sides of the upper connecting ring (12), and connecting nuts (10) are provided at the front ends of the two sides of the lower connecting ring (4).

5. The universal pelletizing rotary kiln body according to claim 4, characterized in that: The insertion holes (5) penetrate the interior of the lower connecting ring (4) and the upper connecting ring (12) respectively, the rear ends of the connecting bolts (11) penetrate the interior of the upper connecting ring (12) and the lower connecting ring (4) respectively, and the connecting nut (10) is threadedly connected to the outside of the connecting bolt (11).

6. The universal pelletizing rotary kiln body according to claim 4, characterized in that: The lower connecting ring (4) and the upper connecting ring (12) are respectively arranged in multiple groups on the outside of the outer shell (2).

7. The universal pelletizing rotary kiln body according to claim 1, characterized in that: A second side cover (13) is arranged on the left side of the outer shell (2), a first side cover (8) is arranged on the right side of the outer shell (2), fixing bolts (17) are arranged on the left side of the second side cover (13) and the right side of the first side cover (8), respectively; a second fixing block (15) is welded and fixed on the left side of the outer shell (2), and three groups of the second fixing blocks (15) are arranged in an annular manner at equal intervals on the left side of the outer shell (2); a first fixing block (16) is welded and fixed on the right side of the outer shell (2), and three groups of the first fixing blocks (16) are arranged in an annular manner at equal intervals on the right side of the outer shell (2); threaded holes (14) for fitting with the fixing bolts (17) are respectively provided in the interior of the left side of the second fixing block (15) and the interior of the right side of the first fixing block (16), and the first side cover (8) and the second side cover (13) are symmetrically arranged with respect to the vertical center line of the outer shell (2).

8. The universal pelletizing rotary kiln body according to claim 7, characterized in that: The fixing bolts (17) respectively penetrate the interior of the second side cover (13) and the first side cover (8), and three groups of the fixing bolts (17) are respectively arranged in an annular manner at equal intervals on the right side of the first side cover (8) and the left side of the second side cover (13).

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