High-frequency smelting furnace for XRF detection of bauxite calcium oxide

Abstract

The utility model discloses a high frequency smelter for bauxite calcium oxide XRF detection, which is characterized in that the high frequency smelter comprises a smelter body and a high frequency induction heater, a hearth is arranged in the smelter body, a crucible bearing platform is arranged in the hearth, the crucible bearing platform is placed on the ground of the hearth, N induction heating coils with the same winding are arranged in the hearth, the induction heating coils are wound by copper pipes, the N induction heating coils are located on the crucible bearing platform, the N induction heating coils are regularly arranged above the crucible bearing platform, and the N induction heating coils penetrate through the smelting furnace body and then are connected with a high-frequency induction heating machine. The smelting furnace body is provided with a breather pipe and an air outlet hole which are communicated with the hearth, and the breather pipe is connected with an air supply device. According to the utility model, a plurality of crucibles can be smelted at a time, and a plurality of sample glass sheets can be prepared through one-time melting, so that the melting efficiency is greatly improved, uncertain factors are reduced, and the accuracy of an XRF detection result is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric furnace equipment for bauxite detection, and in particular to a high-frequency furnace for XRF detection of bauxite calcium oxide. Background Art

[0002] Bauxite is a major raw material for the production of refractories, abrasives, chemicals, high-alumina cement, and aluminum smelting, playing a vital role in national production. Bauxite has a complex composition. Calcium oxide, an impurity found in bauxite, is typically present at relatively high levels, directly impacting its industrial applications. Currently, calcium oxide concentrations in bauxite are typically determined using ICP atomic emission spectrometry and atomic absorption spectrometry (AAS). Trace element determination is performed using traditional chemical titration. This not only complicates sample preparation and results, but also requires a long analysis cycle. Furthermore, the results are significantly affected by the analyst and various reagents.

[0003] X-ray fluorescence spectrometry (XRF) is a fast, simple and reliable testing technology that is widely used to determine calcium oxide in bauxite. When using X-ray fluorescence spectrometry (XRF) to test bauxite, the sample needs to be prepared into a glass sheet through glass melting before testing.

[0004] The melting process of the glass sheets is carried out in a high-frequency furnace. However, the current high-frequency furnace can only melt one platinum crucible at a time. Testing the same sample requires three or even more glass sheets, which requires multiple melting processes to complete the preparation. Unexpected situations may occur during the multiple melting processes, resulting in large differences in the melted glass sheets and large errors in the test results. Utility Model Content

[0005] The present application provides a high-frequency melting furnace for XRF detection of bauxite calcium oxide, which can melt multiple crucibles at a time and prepare multiple sample glass sheets at a time, greatly improving the melting efficiency, reducing uncertainties, and improving the accuracy of XRF detection results.

[0006] According to one aspect of the present application, an embodiment provides a high-frequency furnace for XRF detection of bauxite calcium oxide, including a furnace body and a high-frequency induction heating machine, the furnace body is provided with a furnace chamber and a furnace door, a crucible support is provided in the furnace chamber, the crucible support is placed on the furnace chamber floor, N induction heating coils with the same winding are provided in the furnace chamber, the induction heating coils are wound with copper tubes, the N induction heating coils are located above the crucible support, the melting crucible is placed in the induction heating coil and supported by the crucible support, the N induction heating coils are regularly arranged above the crucible support, the N induction heating coils pass through the furnace body and are connected to the high-frequency induction heating machine, the furnace body is provided with a vent pipe and an air outlet connected to the furnace chamber, the vent pipe is connected to the gas supply device, so that the furnace chamber is in a certain atmosphere during the heating process, and the function of the air outlet is to balance the air pressure inside and outside the furnace chamber.

[0007] Furthermore, the crucible support is provided with a boss at the position where the crucible is placed, and the upper surface of the boss is located in the induction heating coil, ensuring that the sample at the bottom of the crucible is heated quickly and evenly, reducing the heating time, and the number of the bosses is equal to the number of induction heating coils.

[0008] Furthermore, the number of induction heating coils in the furnace is 2≤N≤16.

[0009] Furthermore, the N induction heating coils are connected to the high-frequency induction heating machine in a manner of being all connected in series, all connected in parallel, or connected in series in groups and then in parallel.

[0010] Furthermore, a cooling water pumping device is provided in the high-frequency induction heating machine and is connected to the copper pipe. Cooling water flows through the copper pipe to prevent the induction heating coil from overheating during the heating process.

[0011] Furthermore, the surface of the induction heating coil in the furnace is coated with a zirconium oxide ceramic coating for insulation to prevent the crucible from contacting the induction heating coil and causing the induction heating coil to short-circuit, thereby losing the induction heating effect. Bauxite sample glass sheets are usually melted in a platinum crucible. The platinum crucible is a metal that can conduct electricity and is in an oxidizing environment in the furnace to protect the copper tube from oxidation.

[0012] Furthermore, a nozzle is provided in the furnace, and the nozzle is connected to the ventilation pipe.

[0013] Furthermore, the nozzle is arranged above and around the induction heating coil, and the nozzle faces the induction heating coil.

[0014] Furthermore, a nozzle is provided above each of the induction heating coils.

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

[0016] 1. The utility model discloses a high-frequency furnace for XRF detection of bauxite calcium oxide, which has N built-in induction heating coils and can heat and melt no more than N platinum crucibles at the same time, so that the bauxite samples in these N platinum crucibles are melted under the same conditions, avoiding unexpected situations and ensuring that the prepared samples are under the same conditions.

[0017] 2. The utility model provides a high-frequency furnace for XRF detection of bauxite calcium oxide, which can be introduced into the furnace during sample preparation to achieve atmosphere melting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 The figure is a top view of an induction heating coil and a crucible support according to an embodiment.

[0020] In the figure, 1. furnace body; 11. furnace chamber; 12. crucible support; 13. boss; 14. induction heating coil; 15. vent pipe; 16. air outlet; 2. high-frequency induction heating machine. DETAILED DESCRIPTION

[0021] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0022] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0023] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0024] Example 1:

[0025] Please refer to Figure 1 and Figure 2 In one embodiment, a high-frequency furnace for XRF detection of bauxite calcium oxide is provided, including a furnace body 1 and a high-frequency induction heater 2.

[0026] The furnace body 1 is provided with a furnace chamber 11 and a furnace door. A crucible support 12 is provided in the furnace chamber 11. The crucible support 12 is made of 99% alumina ceramic and is rectangular. Nine circular bosses 13 are provided on the upper surface in a 3×3 manner. The crucible support 12 is placed on the floor of the furnace chamber 11. Nine induction heating coils 14 with the same winding are provided in the furnace chamber 11. The induction heating coils 14 are wound with copper tubes. The nine induction heating coils 14 are located above the crucible support 12. The nine induction heating coils 14 are also arranged in a 3×3 manner above the crucible support 12, so that each boss 13 on the crucible support 12 is inserted into an induction heating coil 14. The melting crucible is placed in the induction heating coil 14 and supported by the boss 13 of the crucible support 12.

[0027] The surface of the induction heating coil 14 in the furnace 11 is coated with a zirconium oxide ceramic coating for insulation to prevent the crucible from contacting the induction heating coil 14 and causing the induction heating coil to short-circuit, thereby losing the induction heating effect. Bauxite sample glass sheets are usually melted in a platinum crucible. The platinum crucible is a metal that can conduct electricity and is in an oxidizing environment in the furnace 11 to protect the copper tube from oxidation.

[0028] The nine induction heating coils 14 pass through the furnace body 1 and are connected to the high-frequency induction heating machine 2 in parallel. The high-frequency induction heating machine 2 is equipped with a cooling water pumping device, which is connected to each induction heating coil 14. Cooling water flows through the copper tube to prevent the induction heating coil 14 from overheating during the heating process.

[0029] The furnace body 1 is provided with a vent pipe 15 and an air outlet 16 connected to the furnace 11. The vent pipe 15 is connected to the air supply device to keep the furnace 11 in a certain atmosphere during the heating process. The function of the air outlet is to balance the air pressure inside and outside the furnace 11.

[0030] Example 2:

[0031] In one embodiment, a high-frequency furnace for XRF detection of bauxite calcium oxide is provided, which includes a furnace body 1 and a high-frequency induction heater 2 .

[0032] The furnace body 1 is provided with a furnace chamber 11 and a furnace door. A crucible support 12 is provided in the furnace chamber 11. The crucible support 12 is made of silicon carbide ceramics and is circular. On the upper surface, there are one in the center and seven evenly distributed around the center circumference, with a total of eight circular bosses 13. The crucible support 12 is placed on the floor of the furnace chamber 11. Eight induction heating coils 14 with the same windings are provided in the furnace chamber 11. The induction heating coils 14 are wound with copper tubes. The eight induction heating coils 14 are located above the crucible support 12. The nine induction heating coils 14 are also arranged above the crucible support 12 in the same manner, with one in the center and seven evenly distributed around the center circumference, so that each boss 13 on the crucible support 12 is inserted into an induction heating coil 14. The melting crucible is placed in the induction heating coil 14 and supported by the boss 13 of the crucible support 12.

[0033] The surface of the induction heating coil 14 in the furnace 11 is coated with a zirconium oxide ceramic coating for insulation to prevent the crucible from contacting the induction heating coil 14 and causing a short circuit in the induction heating coil, thereby losing the induction heating effect. Bauxite sample glass sheets are usually melted in a platinum crucible. The platinum crucible is a metal that can conduct electricity and is in an oxidizing environment in the furnace to protect the copper tube from oxidation.

[0034] After the eight induction heating coils 14 are connected in series head to tail inside the furnace 11, they pass through the furnace body 1 and are connected to the high-frequency induction heating machine 2. A cooling water pumping device is provided in the high-frequency induction heating machine 2, and cooling water is passed through the copper pipe to prevent the induction heating coils 14 from overheating during the heating process.

[0035] The furnace body 1 is provided with a vent pipe 15 and an air outlet 16 connected to the furnace chamber. The vent pipe 15 is connected to the gas supply device. A nozzle is provided inside the furnace chamber 11 of the furnace body 1. The nozzle is connected to the vent pipe 15. The nozzle is made of zirconia ceramic and is arranged above the furnace chamber 11. The nozzle faces the induction heating coil 14. During the heating process, the furnace chamber 11 is placed in a certain atmosphere environment. The function of the air outlet 16 is to balance the air pressure inside and outside the furnace chamber 11.

[0036] Example 3:

[0037] In one embodiment, a high-frequency furnace for XRF detection of bauxite calcium oxide is provided, which includes a furnace body 1 and a high-frequency induction heater 2 .

[0038] The furnace body 1 is provided with a furnace chamber 11 and a furnace door. A crucible support 12 is provided in the furnace chamber 11. The crucible support 12 is made of 99% alumina ceramic and is rectangular. 16 circular bosses 13 are provided on the upper surface in a 4×4 manner. The crucible support 12 is placed on the floor of the furnace chamber 11. 16 induction heating coils 14 with the same winding are provided in the furnace chamber 11. The induction heating coils 14 are wound with copper tubes. The 16 induction heating coils 14 are located above the crucible support 12. The 16 induction heating coils 14 are also arranged in a 4×4 manner above the crucible support 12, so that each boss 13 on the crucible support 12 is inserted into an induction heating coil 4. The melting crucible is placed in the induction heating coil 14 and supported by the boss 13 of the crucible support 12.

[0039] The surface of the induction heating coil 14 in the furnace 11 is coated with a zirconium oxide ceramic coating for insulation to prevent the crucible from contacting the induction heating coil 14 and causing the induction heating coil 14 to short-circuit, thereby losing the induction heating effect. Bauxite sample glass sheets are usually melted in a platinum crucible. The platinum crucible is a metal that can conduct electricity and is in an oxidizing environment in the furnace to protect the copper tube from oxidation.

[0040] The 16 induction heating coils 14 are grouped into 4 adjacent groups, which are divided into 4 groups in total. The induction heating coils 14 in each group are connected in series with copper tubes, and then pass through the furnace body 1 and are connected to the high-frequency induction heating machine 2 in parallel. A cooling water pumping device is provided in the high-frequency induction heating machine 2, and cooling water is passed through the copper tube to prevent the induction heating coils 14 from overheating during the heating process.

[0041] The furnace body 1 is provided with a vent pipe 15 and an air outlet 16 connected to the furnace chamber. The vent pipe 15 is connected to the gas supply device. A nozzle is provided inside the furnace chamber of the furnace body 1. The nozzle is connected to the vent pipe 15. The nozzle is made of zirconia ceramic. A nozzle is provided above each induction heating coil 14. At the same time, four nozzles facing the induction heating coil 14 are provided around the crucible base 12. The nozzles face the induction heating coil 14. During the heating process, the furnace chamber 11 is placed in a certain atmosphere. The air outlet 16 is used to balance the air pressure inside and outside the furnace chamber 11.

[0042] In the process of preparing glass slice samples for XRF detection of bauxite calcium oxide, the amount of sample is very small. The usual practice is to take 1.4g of bauxite sample and put it into a platinum crucible, add 7g of mixed solvent, and then add 1.0-1.1g of oxidant. After mixing, 0.8g of NH4Br solution is dropped into it. After mixing, it is placed in a high-frequency furnace and oxidized at 950℃ for 120s. Then the temperature is raised to 1200℃ and maintained for 150s. Then it is cooled within 120s to form a sample glass slice for XRF detection.

[0043] The utility model discloses a high-frequency melting furnace for XRF detection of bauxite calcium oxide. A plurality of platinum crucibles can be placed at the same time, and a vent pipe can be connected to an oxygen device. During the heating process, the furnace is kept in an oxygen-rich environment, which can reduce the amount of oxidant used in the sample preparation process and ensure that calcium oxide in the sample is not lost. In addition, oxygen can be passed through the vent pipe in the later stage to accelerate cooling, so that cooling to a state of forming a glass sheet can be achieved within 120 seconds.

[0044] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A high-frequency furnace for XRF detection of bauxite calcium oxide, characterized by: The invention comprises a furnace body and a high-frequency induction heating machine, wherein the furnace body is provided with a furnace chamber and a furnace door, the furnace chamber is provided with a crucible support, the crucible support is placed on the furnace chamber floor, N induction heating coils with the same winding are provided in the furnace chamber, the induction heating coils are wound with copper tubes, the N induction heating coils are located above the crucible support, the N induction heating coils are regularly arranged above the crucible support, the N induction heating coils pass through the furnace body and are connected to the high-frequency induction heating machine, the furnace body is provided with a vent pipe and an air outlet connected to the furnace chamber, and the vent pipe is connected to the gas supply device.

2. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 1, characterized in that: The crucible support is provided as a boss at the position where the crucible is placed, the upper surface of the boss is located in the induction heating coil, and the number of the bosses is equal to the number of the induction heating coils.

3. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 1, characterized in that: The number of induction heating coils in the furnace is 2≤N≤16.

4. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 1, characterized in that: The N induction heating coils are connected to the high-frequency induction heating machine in a manner of all being connected in series, all being connected in parallel, or being connected in groups in series and then in parallel.

5. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 1, characterized in that: A cooling water pumping device is provided in the high-frequency induction heating machine and is connected to the copper pipe.

6. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 1, characterized in that: The surface of the induction heating coil in the furnace is coated with a zirconium oxide ceramic coating.

7. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 1, characterized in that: A nozzle is provided in the furnace, and the nozzle is connected to the ventilation pipe.

8. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 7, characterized in that: The nozzle is arranged above and around the induction heating coil, and the nozzle faces the induction heating coil.

9. The high-frequency furnace for XRF detection of bauxite calcium oxide according to claim 7, characterized in that: A nozzle is arranged above each of the induction heating coils.

Images