CN217764413U - Crucible pot - Google Patents

Abstract

The utility model relates to a melt processing equipment technical field, concretely relates to crucible. The pot comprises a pot body, wherein a first boss is arranged at the center of the bottom of the pot body, a plurality of second bosses are also arranged at the bottom of the pot body, and the second bosses are circumferentially arranged between the first bosses and the inner wall of the pot body in an array manner; the height of the second boss is 45% -55% of the height of the first boss. To the not good technical problem of traditional crucible result of use, the utility model provides a crucible, it utilizes first boss and the second boss of pot body bottom setting for the crucible has better impact resistance, and sets up the silicon nitride coating in the crucible inside and outside wall, plays better result of use.

Description

Crucible pot

Technical Field

The utility model relates to a melt processing equipment technical field, concretely relates to crucible.

Background

Crucibles are commonly used for heating molten materials, such as are commonly used in nonferrous metal melting in medium frequency electric furnaces, and are generally classified into graphite crucibles and corundum crucibles.

The graphite crucible used in the intermediate frequency electric furnace can accelerate the melting of the heated metal, but the graphite crucible is easy to generate cracks, burning loss and the like due to thermal change. When non-ferrous metals with lower melting points are melted and are produced discontinuously, the low-melting-point melt has good fluidity, is easy to drill into cracks, and causes crack expansion under the action of thermal expansion and cold contraction, so the service life of the graphite crucible is generally shorter; meanwhile, in the process of melting metal in the medium-frequency electric furnace, when the material is loaded into the graphite crucible, the bottom of the crucible is easily impacted, so that the bottom of the crucible is damaged and cracked or leaks. The bottom of part of the traditional graphite crucible adopts a goose egg-shaped structure, so that although the damage of impact on the bottom is reduced, the melt capacity is reduced, the energy conservation is not facilitated, and the production efficiency is improved; the heating temperature of the graphite crucible is higher in the heating process, and in order to preserve heat, the heat insulation distance between the graphite crucible and the heating coil is increased, so that the capacity of the graphite crucible is further reduced.

The industry usually will use the corundum crucible to replace graphite crucible, and the corundum crucible is generally the cylinder shape, though can increase single-furnace capacity, and hardness is higher than graphite crucible, but when the bottom of a boiler receives the material impact, easily forms the infundibulate pit, and then causes crucible bottom defect sunken fracture or blow-out. If whole increase crucible bottom thickness, the risk of fracture blow-out that reducible material brought to the bottom impact, nevertheless can be in pot wall and pot bottom handing-over department, increase by a wide margin because of the poor crackle that produces the shrinkage that rises with heat of both thicknesses, consequently can not prolong the life of crucible. When the corundum crucible is prepared, microcracks or fine holes penetrating into the furnace body exist, when nonferrous metals with the melting point lower than 600 ℃ are melted, melts with better fluidity easily enter the cracks or the holes, and the cracks or the holes are expanded under the condition of alternating cold and heat, so that furnace leakage is caused, and the service life of the crucible is shortened.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by the utility model

To the not good technical problem of traditional crucible result of use, the utility model provides a crucible, it utilizes first boss and the second boss of pot body bottom setting for the crucible has better impact resistance, and sets up the silicon nitride coating at the crucible inside and outside wall, plays better result of use.

Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a crucible comprises a pot body, wherein a first boss is arranged at the center of the bottom of the pot body, a plurality of second bosses are further arranged at the bottom of the pot body, and the second bosses are circumferentially arranged between the first bosses and the inner wall of the pot body in an array manner; the height of the second boss is 45% -55% of that of the first boss; and silicon nitride coatings are arranged on the surface of the pot body and the outer surfaces of the first boss and the second boss.

Optionally, the height of the first boss is 5% -8% of the height of the interior of the pot body.

Optionally, the second boss height is 50% of the first boss height.

Optionally, the first boss is a circular truncated cone, the diameter of the upper bottom surface of the first boss is 30% -35% of the inner diameter of the pot body, and the diameter of the lower bottom surface of the first boss is 45% -55% of the inner diameter of the pot body.

Optionally, the second boss is a cylinder, and the diameter of the cylinder is 45% -55% of the distance between the bottom edge of the first boss and the inner wall of the pot body.

Optionally, the spacing between the second bosses is one third to one half of the diameter of the cylinder.

Optionally, the thickness difference between the thickness of the side wall of the pot body and the thickness of the bottom of the pot body is 0-15mm.

Optionally, the silicon nitride coating thickness is 0.7-1.3mm.

Optionally, the pot body, the first boss and the second boss are all made of corundum materials.

Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

to the not good technical problem of traditional crucible result of use, the utility model provides a crucible, it utilizes first boss and the second boss of pot body bottom setting for the crucible has better impact resistance, and in the crucible pot, the surface sets up the silicon nitride coating, plays better result of use.

Drawings

Fig. 1 is a schematic structural diagram of a crucible according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. A plurality of technical schemes in the same embodiment and a plurality of technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is all in the scope of the utility model.

Example 1

With reference to fig. 1, the present embodiment provides a crucible, which includes a pot body 100, a first boss 101 is disposed at the center of the bottom of the pot body 100, a plurality of second bosses 102 are further disposed at the bottom of the pot body 100, and the second bosses 102 are circumferentially arranged between the first bosses 101 and the inner wall of the pot body 100; the height of the second boss 102 is 45-55% of the height of the first boss 101; the surface of the pot body 100, and the outer surfaces of the first boss 101 and the second boss 102 are provided with silicon nitride coatings.

According to the crucible of the embodiment, the first boss 101 and the second boss 102 arranged at the bottom of the pot body 100 form an impact-resistant structure, so that the bottom of the pot body 100 of the crucible is prevented from being thinned or even cracked and leaking due to long-term impact of materials, and the service life of the crucible is further prolonged.

Based on a large amount of research and observation on the crucible, the scrapped main reason of the conventional crucible furnace leakage is that the bottom of the pot body 100 is continuously impacted in the material loading process, so that the bottom of the pot body 100 is damaged to generate funnel-shaped depression, and the depression is deeper toward the center. Therefore, the crucible of this embodiment is provided with first boss 101 in the bottom center of pot body 100, as shock-resistant structure to the bottom of pot body 100 can deal with the impact of material loading in-process, and then the life of extension crucible.

Conceivably, the first boss 101 prolongs the service life of the crucible, so that the number of times of crucible use is increased, the number of times of crucible use subjected to material loading impact is increased, and as the number of times of crucible use is increased, the number of times of material impact on the bottom surface of the pot body 100 between the first boss 101 and the inner wall of the pot body 100 is further increased, and the impact damage is increased. Therefore, in order to further protect the bottom surface of the pot body 100 between the first boss 101 and the inner wall of the pot body 100, in this embodiment, a plurality of second bosses 102 are further disposed at the bottom of the pot body 100, and the second bosses 102 are circumferentially arranged between the first boss 101 and the inner wall of the pot body 100. Through the arrangement of the second boss 102, the impact damage of the bottom surface of the pot body 100 between the first boss 101 and the inner wall of the pot body 100 caused by the prolonged service life is compensated.

Based on further observation, in practical use of the crucible, after the bottom surface of the pot body 100 between the first boss 101 and the inner wall of the pot body 100 is damaged by impact, the sunken depth is generally only about half of the damaged sunken depth at the bottom center of the pot body 100. Therefore, the height of the second boss 102 in this embodiment can be set to 45% -55% of the height of the first boss 101, and can be selected according to the crucible size requirement, damage depth prediction situation, and processing conditions, for example, the height of the second boss 102 can be selected to be 45%, 47.5%, 50%, 52.5%, 55% of the height of the first boss 101, and the like.

In the optional embodiment of this embodiment, the first boss 101 and the second boss 102 disposed at the bottom of the pot body 100 are used as impact-resistant structures, which prolongs the service life of the crucible, but the inner wall of the pot body 100 has microcracks and holes, which restricts the synchronous extension of the service life of the crucible, so that silicon nitride coatings are disposed on the inner surface and the outer surface of the pot body 100, and the outer surfaces of the first boss 101 and the second boss 102, and the silicon nitride coatings are disposed on the inner surface and the outer surface of the pot body 100, so that the silicon nitride permeates into the deep microcracks and holes of the crucible, and the microcracks or holes on the inner surface of the pot body 100 are completely sealed, thereby prolonging the service life of the crucible; the silicon nitride coating on the outer surface forms a glaze layer under high-temperature sintering, so that the service life of the crucible can be properly prolonged.

In a preferred manner, the height of the second boss 102 is 50% of the height of the first boss 101. On the premise of meeting the use requirement, the size of the second boss 102 is reduced, the material consumption is reduced, the bottom of the pot body 100 is protected, and the capacity of the pot body 100 cannot be excessively occupied.

As an optional implementation manner of this embodiment, the height of the first boss 101 is 5% -8% of the height of the interior of the pan body 100. The embodiment is an arrangement mode of the first boss 101, the height of the first boss 101 is 5% -8% of the inner height of the pot body 100, and the purpose is to occupy the inner capacity of the pot body 100 as little as possible on the basis of meeting the impact-resistant effect of the first boss 101.

Taking a crucible with a capacity of 0.0961 cubic meter as an example, when the height inside the pot body 100 is 650mm, the height of the first boss 101 can be set to 40mm, that is, the height of the first boss 101 accounts for 6% of the height inside the pot body 100.

In a similar way, based on different crucible sizes and models, when the inside height of the pot body 100 is different, the height of the first boss 101 can be set to 5%, 5.5%, 6%, 6.5%, 7%, 7.5% or 8% of the inside height of the pot body 100 according to actual requirements, the height of the first boss 101 is too low to influence the effect of protecting the bottom of the pot body 100, and the height is too high to occupy the capacity inside the crucible. In a common crucible size type, the crucible capacity is generally below 1 cubic meter, and the height of the first boss 101 is 40-50mm.

As an alternative embodiment of this embodiment, the height of the second boss 102 is 50% of the height of the first boss 101. On the basis of the above embodiments, the present embodiment is a preferable arrangement of the height of the second boss 102 based on the definition of the height of the first boss 101, i.e. keeping the height of the second boss 102 to be 50% of the height of the first boss 101. Based on the above embodiment, in practical use of the crucible, after the bottom surface of the pot body 100 between the first boss 101 and the inner wall of the pot body 100 is damaged by impact, the sinking depth of the bottom surface is generally only about half of the damaged sinking depth of the bottom center of the pot body 100. Therefore, in this embodiment, the height of the second boss 102 is set to be 50% of the height of the first boss 101, so that the volume of the second boss 102 is reduced, the material consumption is reduced, and the bottom of the pot body 100 is protected.

In combination with the limitation of the height of the first boss 101, the height of the second boss 102 is 50% of the height of the first boss 101 in this embodiment, so as to further ensure that the first boss 101 and the second boss 102 do not occupy the volume of the pot body 100 too much.

As an optional implementation manner of this embodiment, the first boss 101 is a circular truncated cone, the diameter of the upper bottom surface of the first boss 101 is 30% -35% of the inner diameter of the pot body 100, and the diameter of the lower bottom surface of the first boss 101 is 45% -55% of the inner diameter of the pot body 100. In this embodiment, the first boss 101 is preferably a circular truncated cone in shape, so that a structural shape with a small top and a large bottom is utilized to achieve a better impact resistance effect.

In the practical use of the crucible, the bottom of the pot body 100 is damaged due to impact of materials to generate funnel-shaped depression, the depression is deeper towards the center, generally, the center range with the most serious damage is 0.45-0.55 times of the inner diameter of the crucible, so that the diameter of the lower bottom surface of the first boss 101 is 45% -55% of the inner diameter of the crucible, and the diameter of the lower bottom surface of the first boss 101 can be 45%, 47.5%, 50%, 52.5% or 55% of the inner diameter of the crucible according to the use frequency of the crucible, the service life requirement of the crucible and the size requirement of the crucible. According to practical use, the diameter of the lower bottom surface of the first boss 101 is generally 50% of the inner diameter of the crucible, and if the diameter is too large, heat cracks are easily generated and develop to the deep part of the bottom of the pot body 100.

The diameter of the upper bottom surface of the circular truncated cone is 30% -35% of the inner diameter of the pot body 100, and the purpose is to enable the diameter of the upper bottom surface of the first boss 101 to be smaller than that of the lower bottom surface of the pot body 100, so that the thickness mutation of the bottom of the first boss 101 and the bottom of the pot body 100 is relieved, cracks caused by expansion with heat and contraction with cold are avoided, and the impact resistance of the bottom of the pot body 100 is affected by too small thickness. The diameter of the upper bottom surface of the first boss 101 is set to 30%, 31.5%, 33%, 34.5%, 35%, etc. of the inner diameter of the crucible, depending on the frequency of use of the crucible, the life requirement of the crucible, and the size requirement of the crucible. According to practical use, the diameter of the upper bottom surface of the first boss 101 is preferably 30% of the inner diameter of the bottom of the crucible.

As an optional implementation manner of this embodiment, the second boss 102 is a cylinder, and the diameter of the cylinder is 45% to 55% of the distance between the bottom edge of the first boss 101 and the inner wall of the pot body 100. In this embodiment, the second boss 102 is preferably cylindrical in shape. Observation shows that the diameter of the second boss 102 is too small to be easily broken under the impact of materials, and the effect of protecting the bottom of the pot body 100 is not synchronously increased and occupies the space of the materials when the diameter is too large.

Therefore, the diameter of the second boss 102 can be 45% -55% of the distance between the bottom edge of the first boss 101 and the inner wall of the pot body 100, and the diameter of the second boss 102 can be 45%, 47.5%, 50%, 52.5% or 55% of the distance between the bottom edge of the first boss 101 and the inner wall of the pot body 100 according to the use frequency of the crucible, the service life requirement of the crucible and the size requirement of the crucible. Meanwhile, the diameter of the second boss 102 is smaller than that of the bottom of the pot body 100, so that heat cracks are not easy to generate, and even if the heat cracks are generated, the heat cracks surround the periphery of the bottom of the second boss 102 and cannot develop to the deep part of the bottom of the pot body 100.

In the common crucible size type, the crucible capacity is generally less than 1 cubic meter, in one case, the inner diameter of the pot body 100 of the crucible is 435-440mm, preferably 436mm, when the diameter of the bottom of the first boss 101 is 210mm, the diameter of the lower bottom surface of the first boss 101 is 48% of the inner diameter of the pot body 100, and the diameter of the second boss 102 is preferably 60mm.

Example 2

This example proposes a crucible, which can be modified based on example 1 as follows: the distance between the second bosses 102 is one third to one half of the diameter of the cylinder.

The embodiment is an optional arrangement mode of the distance between the second bosses 102, the distance between the second bosses 102 is generally one third to one half of the diameter of the cylinder of the second bosses 102, if the distance between the second bosses 102 is too large, the effect of protecting the bottom of the pot body 100 is not obvious, if the distance is too small, the effect of protecting the bottom of the pot body 100 is not synchronously increased, and the space occupied by materials is squeezed. The spacing between the second bosses 102 can be selected according to actual use and processing requirements.

In one embodiment, the crucible capacity is less than 1 cubic meter, the inner diameter of the pot body 100 of the crucible is 435-440mm, preferably 436mm, when the diameter of the bottom of the first boss 101 is 210mm, the diameter of the lower bottom surface of the first boss 101 is 48% of the inner diameter of the pot body 100, at this time, the diameter of the second boss 102 is preferably 60mm, and the distance between the second bosses 102 can be 23.5mm.

As an optional implementation mode of the embodiment, the thickness difference between the thickness of the side wall of the pot body 100 and the thickness of the bottom of the pot body 100 is 0-15mm. First boss 101 and the second boss 102 that the pot body 100 bottom set up can reduce pot body 100 bottom thickness as shock-resistant structure, and then promote the capacity of crucible, nevertheless if there is obvious thickness difference in pot body 100 bottom and the thickness of pot wall, under the condition of cold and hot alternation, the pot wall is under the intermediate frequency heating coil cooling of logical cooling water, and the cooling rate is obviously faster than the bottom of the pot body 100, and expend with heat and contract with cold easily leads to thickness sudden change department to split and scrap in advance. Therefore, in this embodiment, the thickness difference between the thickness of the sidewall of the pot body 100 and the thickness of the bottom of the pot body 100 needs to be controlled below 15mm, so as to prevent cracks caused by thermal expansion and cold contraction when the difference is too large.

As an alternative embodiment of this example, the silicon nitride coating thickness is 0.7-1.3mm. Based on actual use conditions, the thickness of the silicon nitride should be controlled to be 0.7-1.3mm, namely the thickness of the silicon nitride coating can be 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm and the like, and the thickness of the silicon nitride coating can be selected according to the use frequency of the crucible, the service life requirement of the crucible and the capacity requirement of the crucible. The silicon nitride coating is too thin to completely seal microcracks or holes on the inner surface of the crucible body 100; if the thickness of the silicon nitride coating is too large, the coating is not easy to adhere to the surface of the pan body 100, and the risk of falling off or cracking in the sintering process exists.

In the common crucible size type, the capacity of the crucible is generally less than 1 cubic meter, and the preferable thickness of the silicon nitride coating is 0.9mm, so that microcracks or holes on the inner surface of the crucible can be completely closed, and an enamel layer is formed on the outer surface of the crucible, and the silicon nitride is not wasted, so that the cost is controlled.

As an optional implementation manner of this embodiment, the pot body 100, the first boss 101, and the second boss 102 are all made of corundum. As an optional implementation manner of this embodiment, the crucible of this embodiment may be used in a non-ferrous metal melting furnace with a melting point lower than 600 ℃, and when a corundum material is used, the crucible may replace a common graphite crucible to greatly improve the service life and reduce the energy consumption. Compared with a graphite crucible, the graphite crucible has the advantages of better heat insulation effect, lower energy consumption, larger single-furnace capacity and higher production efficiency; compared with the conventional corundum crucible, the corundum crucible has the advantage of longer service life.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (9)

1. A crucible is characterized by comprising a pot body, wherein a first boss is arranged at the center of the bottom of the pot body, a plurality of second bosses are further arranged at the bottom of the pot body, and the second bosses are circumferentially arranged between the first bosses and the inner wall of the pot body in an array manner; the height of the second boss is 45% -55% of that of the first boss; and silicon nitride coatings are arranged on the surface of the pot body and the outer surfaces of the first boss and the second boss.

2. The crucible as recited in claim 1, wherein the height of the first boss is 5% -8% of the height of the interior of the pot body.

3. The crucible as recited in claim 2, wherein said second boss height is 50% of the first boss height.

4. The crucible as claimed in claim 1, wherein the first boss is a circular truncated cone, the diameter of the upper bottom surface of the first boss is 30% -35% of the inner diameter of the pot body, and the diameter of the lower bottom surface of the first boss is 45% -55% of the inner diameter of the pot body.

5. The crucible as claimed in claim 1, wherein the second boss is a cylinder, and the diameter of the cylinder is 45% -55% of the distance between the bottom edge of the first boss and the inner wall of the pot body.

6. A crucible as claimed in claim 5, wherein the spacing between the second bosses is from one third to one half of the diameter of the cylinder.

7. The crucible as claimed in claim 1, wherein the difference between the thickness of the sidewall of the pot body and the thickness of the bottom of the pot body is 0-15mm.

8. A crucible as claimed in claim 1, wherein the silicon nitride coating has a thickness of 0.7 to 1.3mm.

9. A crucible as claimed in any one of claims 1 to 8, wherein the body, the first boss and the second boss are of corundum.

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