Device for measuring carbon content in zinc oxide enrichment

Abstract

The utility model relates to the technical field of the carbon content of zinc oxide enrichment, discloses a device for measuring the carbon content in the zinc oxide enrichment, and solves the problem that the accuracy of carbon and water content detection is poor due to the interference of external air and nitrogen and sulfur substances in the zinc oxide enrichment in the carbon and water content detection of the zinc oxide enrichment. Oxygen is introduced into the combustion tube, the zinc oxide enrichment in the combustion boat is fully combusted in the combustion tube to generate water vapor and carbon dioxide to be measured as well as sulfur and nitrogen oxides, the sulfur and the nitrogen oxides are removed through an oxide impurity removal agent, the water vapor is condensed into water to react with phosphorus pentoxide to generate metaphosphoric acid, then the metaphosphoric acid is electrolyzed, and the content of the phosphorus pentoxide is measured. The hydrogen content in the zinc oxide enrichment is obtained according to the electric quantity consumed by electrolysis, the carbon dioxide is absorbed by the carbon dioxide absorbent, and the carbon content in the zinc oxide enrichment is obtained by detecting the increment of the carbon dioxide absorbent, so that the carbon content and the water content in the zinc oxide enrichment are accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon content in zinc oxide enriched materials, in particular to a device for measuring the carbon content in zinc oxide enriched materials. Background Art

[0002] Zinc oxide concentrate is a zinc oxide product produced by pyrometallurgical volatilization and enrichment of zinc-containing materials such as zinc leaching slag, lead smelting slag, electric furnace steelmaking dust, and blast furnace gas ash (mud). It is commonly used in zinc refining processes. Zinc oxide concentrate is one of the important raw materials for zinc refining. Before use, it is often necessary to test its carbon content and water content to ensure that its content meets the process specifications.

[0003] Existing tests for zinc oxide enrichment are often conducted due to the small sample volume. During the test, carbon and water mixed in from the outside can easily affect the accuracy of the measurement results. Nitrogen, sulfur, and other substances are also commonly contained in the sample. The presence of these elements can also interfere with the carbon content analysis, leading to deviations in the measurement results and affecting the accuracy of the experimental results. Utility Model Content

[0004] The purpose of the utility model is to provide a device for determining the carbon content in zinc oxide enrichment, which solves the problem that the detection of carbon and water content in zinc oxide enrichment is interfered by external air and nitrogen and sulfur substances in the sample, resulting in poor accuracy of carbon and water content detection.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for determining the carbon content in a zinc oxide concentrate, comprising an oxygen cylinder; a combustion tube connected to the oxygen cylinder, a combustion boat for loading the zinc oxide concentrate being provided in the combustion tube, an oxide remover being provided on the inner side of the combustion tube away from the oxygen cylinder, and a combustion furnace for heating the combustion tube being provided on the outer side of the combustion tube; an electrolytic cell being connected to the end of the combustion tube away from the oxygen cylinder, an electric quantity integrator being connected to the electrolytic cell; a carbon dioxide removal U-shaped tube being connected to one side of the electrolytic cell, a carbon dioxide absorbent being provided in the carbon dioxide removal U-shaped tube; the inner wall of the electrolytic cell being coated with a phosphorus pentoxide coating, and the outer side of the electrolytic cell being sheathed with a cooling water jacket.

[0006] Preferably, a purification system for purifying oxygen is provided between the oxygen cylinder and the combustion tube, the purification system comprises a purification tube connected to the oxygen cylinder, a purification furnace is provided on the outside of the purification tube, and linear copper oxide is provided on the inside of the purification tube.

[0007] Preferably, the purification system further comprises a gas drying tube connected to the purification tube, wherein three gas drying tubes are provided and connected end to end in sequence, wherein the gas drying tube at the end is connected to the combustion tube, and color-changing silica gel, alkali asbestos and anhydrous magnesium perchlorate are respectively provided in the three gas drying tubes in the direction from the purification tube to the combustion tube.

[0008] Preferably, an oxygen flow meter is connected between the two gas drying tubes containing the alkali asbestos and anhydrous magnesium perchlorate.

[0009] Preferably, the combustion tube is a straight tube with a fixed length and inner diameter, one end of which is connected to an air outlet with an inner diameter smaller than its diameter, and the other end is a sample delivery port. The side surface of the combustion tube adjacent to the sample delivery port is differentially provided with an oxygen inlet, the oxygen inlet is connected to the last gas drying tube, the air outlet is connected to the electrolytic cell, the sample delivery assembly is installed at the position of the sample delivery port, the combustion boat is located between the oxygen inlet and the air outlet, the oxide remover is located on the side of the combustion tube close to the air outlet, and aluminum silicate wool is also provided in the combustion tube between the oxide remover and the air outlet.

[0010] Preferably, the sample delivery component includes a sealing plug at the sample delivery port position, a glass tube is penetrated and slidably provided on the inner side of the sealing plug, the glass tube is in sealing contact with the sealing plug, the end of the glass tube away from the combustion tube is connected to a flip rubber cap, a silicone tube is provided between the flip rubber cap and the glass tube, a nickel-chromium wire push rod is provided on the inner side of the glass tube, the two ends of the nickel-chromium wire push rod extending out of the glass tube have a length, a hook is provided on the end of the nickel-chromium wire push rod close to the inner side of the combustion tube, and the other end thereof penetrates the flip rubber cap to the outside, and the nickel-chromium wire push rod slides and is sealed in the flip rubber cap.

[0011] Preferably, an electrolysis electrode is provided on the outer surface of the electrolysis cell, and a plurality of electrode columns are provided in a ring shape on the inner wall of the electrolysis cell and are electrically connected to the electrolysis electrodes. A pair of electrolysis electrodes are provided, which are respectively connected to the positive and negative poles of the power supply, and the two groups of electrode columns connected to the positive and negative poles of the power supply are staggered.

[0012] Preferably, a nitrogen removal U-shaped tube and a water absorption U-shaped tube are further provided between the carbon dioxide removal U-shaped tube and the electrolytic cell. Two carbon dioxide removal U-shaped tubes are provided. The nitrogen removal U-shaped tube, the water absorption U-shaped tube and the two carbon dioxide removal U-shaped tubes are connected in series in sequence. A bubble meter is also connected in series on one side of the last carbon dioxide removal U-shaped tube.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The utility model provides a device for measuring the carbon content in a zinc oxide enriched product. By introducing sufficient oxygen into a combustion tube, the zinc oxide enriched product in a combustion boat is fully burned under high-temperature heating of a combustion furnace, generating water vapor and carbon dioxide to be measured, as well as sulfur oxides and nitrogen oxides. The sulfur oxides and nitrogen oxides are removed by an oxide impurity remover, and the water vapor condenses into water on the inner wall of an electrolytic cell. The water reacts with phosphorus pentoxide on the inner wall of the electrolytic cell to generate metaphosphoric acid. The metaphosphoric acid is then electrolyzed, and the electricity consumed by the electrolysis is measured by an electric quantity integrator to obtain the hydrogen content in the water, and further obtain the hydrogen content in the zinc oxide enriched product. The carbon dioxide is absorbed by a carbon dioxide absorbent, and then the carbon content in the zinc oxide enriched product is accurately calculated by detecting the increment of the carbon dioxide absorbent, thereby accurately measuring the carbon and hydrogen contents in the zinc oxide enriched product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the measurement process of the utility model;

[0016] Figure 2 This is a schematic diagram of the combustion tube structure of the present utility model;

[0017] Figure 3 This is a schematic structural diagram of an electrolytic cell of the present utility model;

[0018] Figure 4 This is a schematic diagram of the sample delivery component of the present utility model.

[0019] In the figure: 1. Oxygen cylinder; 2. Gas drying tube; 3. Purification furnace; 4. Linear copper oxide; 5. Purification tube; 6. Color-changing silica gel; 7. Alkali asbestos; 8. Oxygen flowmeter; 9. Anhydrous magnesium perchlorate; 10. Sample delivery assembly; 101. Nichrome wire push rod; 102. Flip-up rubber cap; 103. Glass tube; 104. Silicone tube; 105. Sealing plug; 106. Hook; 11. Combustion furnace; 12. Combustion boat; 13. Combustion tube; 131. Sample delivery port; 132. Oxygen inlet; 133. Gas outlet; 14. Oxide remover; 15. Aluminum silicate wool; 16. Electrolytic cell; 161. Electrolytic electrode; 162. Electrode column; 17. Cooling water jacket; 18. Nitrogen removal U-tube; 19. Water absorption U-tube; 20. Carbon dioxide removal U-tube; 21. Bubble meter; 22. Coulometric integrator. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0022] Please refer to Figure 3, which shows a device for determining the carbon content in a zinc oxide concentrate, comprising an oxygen cylinder; a combustion tube connected to the oxygen cylinder, wherein a combustion boat for loading the zinc oxide concentrate is provided in the combustion tube, an oxide remover is provided on the inner side of the combustion tube away from the oxygen cylinder, and a combustion furnace for heating the combustion tube is provided on the outer side of the combustion tube; an electrolytic cell is connected to the end of the combustion tube away from the oxygen cylinder, and an electric quantity integrator is connected to the electrolytic cell; a carbon dioxide removal U-shaped tube is connected to one side of the electrolytic cell, and a carbon dioxide absorbent is provided in the carbon dioxide removal U-shaped tube; the inner wall of the electrolytic cell is coated with a phosphorus pentoxide coating, and the outer side of the electrolytic cell is sheathed with a cooling water jacket.

[0023] The above working principle and technical effect are as follows: sufficient oxygen is introduced into the combustion tube from an oxygen cylinder, so that the zinc oxide enriched material in the combustion boat is fully burned under the high temperature heating of the combustion furnace, generating water vapor and carbon dioxide to be measured, as well as sulfur oxides and nitrogen oxides. Among them, the sulfur oxides and nitrogen oxides are removed by an oxide impurity remover to eliminate their interference with detection. When the above-mentioned water vapor passes through the electrolytic cell, under the cooling effect of the cooling water jacket, the water vapor condenses into water on the inner wall of the electrolytic cell. The water reacts with phosphorus pentoxide on the inner wall of the electrolytic cell to generate metaphosphoric acid, which is then electrolyzed. The electricity consumed by the electrolysis is measured by an electric integrator, and the hydrogen content in the water is obtained, thereby further obtaining the accurate hydrogen content in the zinc oxide enriched material. The generated carbon dioxide passes through the carbon dioxide removal U-shaped tube and is absorbed by the carbon dioxide absorbent. Then, by detecting the increase in the carbon dioxide absorbent, the carbon content in the zinc oxide enriched material is accurately calculated.

[0024] In the previous embodiment: a purification system for purifying oxygen is provided between the oxygen cylinder and the combustion tube, the purification system comprising a purification tube connected to the oxygen cylinder, a purification furnace provided on the outside of the purification tube, and linear copper oxide provided on the inside of the purification tube; the purification tube is heated by the purification furnace, and when the oxygen output from the oxygen cylinder passes through the purification tube, the linear copper oxide acts as a reduction catalyst to help remove impurities in the oxygen, mainly by reacting with carbon-containing impurities and converting them into carbon dioxide.

[0025] Furthermore, the purification system further includes a gas drying tube connected to the purification tube, wherein three gas drying tubes are provided and connected end to end in sequence, and the gas drying tube at the end is connected to the combustion tube, and color-changing silica gel, alkali asbestos and anhydrous magnesium perchlorate are respectively provided in the three gas drying tubes in the direction from the purification tube to the combustion tube;

[0026] After the oxygen output from the oxygen cylinder is purified by the purification tube, it is sequentially passed into three gas drying tubes. First, color-changing silica gel is used as a desiccant to further absorb moisture in the oxygen, ensuring the dryness of the oxygen and preventing this moisture from affecting subsequent water content detection. Subsequently, alkaline asbestos neutralizes and removes acidic impurities such as carbon dioxide through chemical adsorption, further improving the purity of the oxygen and preventing carbon dioxide from affecting subsequent carbon content detection. Finally, anhydrous magnesium perchlorate is used as a strong desiccant in the final stage of oxygen purification to ensure the complete removal of moisture from the oxygen.

[0027] Further, an oxygen flow meter is connected between the two gas drying tubes provided with the alkali asbestos and anhydrous magnesium perchlorate;

[0028] Furthermore, the oxygen flow meter is used to detect the output flow rate of oxygen to prevent the oxygen flow rate from being too fast.

[0029] In the previous embodiment: the combustion tube is a straight tube with a fixed length and inner diameter, one end of which is connected to an air outlet with an inner diameter smaller than its diameter, and the other end is a sample delivery port, the side surface of the combustion tube adjacent to the sample delivery port is differentially provided with an oxygen inlet, the oxygen inlet is connected to the last gas drying tube, the air outlet is connected to the electrolytic cell, the sample delivery assembly is installed at the position of the sample delivery port, the combustion boat is located between the oxygen inlet and the air outlet, the oxide impurity remover is located on one side of the combustion tube close to the air outlet, aluminum silicate wool is also provided in the combustion tube between the oxide impurity remover and the air outlet, and the combustion tube includes a thermal decomposition product of silver permanganate and granular manganese dioxide.

[0030] The above working principle and technical effect are: oxygen after impurities are removed by the purification system is injected into the inner side of the combustion tube through the oxygen inlet, so that the zinc oxide enriched material in the combustion boat can fully react in the oxygen flow; the sulfur oxides generated by the zinc oxide enriched material during combustion are removed by the pyrolysis products of silver permanganate, and the nitrogen oxides generated are removed by granular manganese dioxide to eliminate the interference of sulfur and nitrogen oxides on carbon determination; the setting of aluminum silicate wool is used for heat insulation and heat preservation of the combustion tube.

[0031] In the previous embodiment: the sample delivery component includes a sealing plug at the sample delivery port position, a glass tube is penetrated and slidably provided on the inner side of the sealing plug, the glass tube is in sealing contact with the sealing plug, the end of the glass tube away from the combustion tube is connected to a flip rubber cap, a silicone tube is provided between the flip rubber cap and the glass tube, a nickel-chromium wire push rod is provided on the inner side of the glass tube, the two ends of the nickel-chromium wire push rod extending out of the glass tube have a length, a hook is provided on the end of the nickel-chromium wire push rod close to the inner side of the combustion tube, and the other end thereof penetrates the flip rubber cap to the outside, and the nickel-chromium wire push rod slides and is sealed in the flip rubber cap.

[0032] The above working principle and technical effect are: the nickel-chromium wire push rod is moved by the flip rubber cap, and the glass tube slides left and right inside the sealing plug. The hook at one end of the nickel-chromium wire push rod is responsible for sending the combustion boat to the predetermined position inside the combustion tube, including taking it out from the inside of the combustion tube. The silicone tube is used to isolate the high temperature of the glass tube from being transmitted to the flip rubber cap. The nickel-chromium wire push rod slides and is sealed in the flip rubber cap, which makes it easy to adjust the length of the end of the nickel-chromium wire push rod with the hook extending from one end of the glass tube, so as to flexibly cope with the taking and placing of the combustion boat.

[0033] In the previous embodiment, an electrolytic electrode is provided on the outer surface of the electrolytic cell, and a plurality of electrode columns are provided in a ring shape on the inner wall of the electrolytic cell and are electrically connected to the electrolytic electrode. A pair of electrolytic electrodes are provided, which are respectively connected to the positive and negative poles of the power supply, and the two groups of electrode columns connected to the positive and negative poles of the power supply are staggered.

[0034] The above working principle and technical effect are: the electrolytic cell has a length, and when the water vapor generated by the combustion of the zinc oxide enrichment in the combustion tube passes through the electrolytic cell, it will condense into water droplets on the inner wall of the electrolytic cell under the cooling effect of the cooling water jacket. The water droplets react with the phosphorus pentoxide on the inner wall of the electrolytic cell to generate metaphosphoric acid, and then the metaphosphoric acid is electrolyzed by the electrode column, so that the electricity integrator can obtain the hydrogen content in the zinc oxide enrichment according to the electricity consumed by the electrolysis, and further obtain the water content.

[0035] In the previous embodiment: a nitrogen removal U-shaped tube and a water absorption U-shaped tube are further provided between the carbon dioxide removal U-shaped tube and the electrolytic cell, and two carbon dioxide removal U-shaped tubes are provided. The nitrogen removal U-shaped tube, the water absorption U-shaped tube and the two carbon dioxide removal U-shaped tubes are connected in series in sequence, and a bubble meter is also connected in series on one side of the last carbon dioxide removal U-shaped tube.

[0036] The above working principle and technical effect are: before the carbon dioxide is detected through the carbon dioxide removal U-shaped tube, the gas introduced is first tested for nitrogen and water content through the nitrogen removal U-shaped tube and the water absorption U-shaped tube respectively, which ensures that the water vapor is completely condensed in the electrolytic cell and that the nitrogen element is completely removed in the previous operation. Then, after entering the carbon dioxide removal U-shaped tube, the first carbon dioxide removal U-shaped tube absorbs carbon dioxide to measure the amount of carbon dioxide absorbed, and the last carbon dioxide removal U-shaped tube is used to detect whether the previous carbon dioxide removal U-shaped tube has completely absorbed carbon dioxide. The bubble meter is used to observe whether bubbles are discharged in order to understand the gas circulation situation in the device.

[0037] Workflow: First place the zinc oxide enriched material on the combustion boat, and then use the sample delivery assembly to deliver the combustion boat to the inside of the combustion tube at the sample delivery port, open the valve of the oxygen cylinder, and observe the output rate of oxygen through the oxygen flowmeter. First, pass oxygen into the combustion tube until bubbles are observed in the bubble meter, and continue to ventilate for a period of time, then turn on the combustion furnace to heat the combustion tube. During the process, the zinc oxide enriched material is fully burned to generate water vapor and carbon dioxide. The water vapor reacts with phosphorus pentoxide in the electrolytic cell to generate metaphosphoric acid, and then the metaphosphoric acid is electrolyzed to measure the amount of electricity consumed by the electrolysis, and the water content in the zinc oxide enriched material is calculated. The carbon dioxide is absorbed through the carbon dioxide removal U-tube, and then the carbon content in the zinc oxide enriched material is calculated by detecting the increase in the carbon dioxide absorbent, thereby measuring the carbon and water content in the zinc oxide enriched material.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring carbon content in zinc oxide enrichment, characterized in that: The invention comprises an oxygen cylinder (1); a combustion tube (13) connected to the oxygen cylinder (1); a combustion boat (12) for loading zinc oxide concentrate is provided in the combustion tube (13); an oxide impurity remover (14) is provided on the inner side of the combustion tube (13) away from the oxygen cylinder (1); a combustion furnace (11) for heating the combustion tube (13) is provided on the outer side of the combustion tube (13); an electrolytic cell (16) is connected to the end of the combustion tube (13) away from the oxygen cylinder (1); an electric quantity integrator (22) is connected to the electrolytic cell (16); a carbon dioxide removal U-shaped tube (20) is connected to one side of the electrolytic cell (16); a carbon dioxide absorbent is provided in the carbon dioxide removal U-shaped tube (20); the inner wall of the electrolytic cell (16) is coated with a phosphorus pentoxide coating, and the outer side of the electrolytic cell (16) is provided with a cooling water jacket (17).

2. The device for measuring carbon content in a zinc oxide enriched product according to claim 1, wherein: A purification system for purifying oxygen is provided between the oxygen cylinder (1) and the combustion tube (13), the purification system comprising a purification tube (5) connected to the oxygen cylinder (1), a purification furnace (3) provided on the outside of the purification tube (5), and linear copper oxide (4) provided on the inside of the purification tube (5).

3. The device for measuring carbon content in a zinc oxide enriched product according to claim 2, wherein: The purification system further comprises a gas drying tube (2) connected to the purification tube (5), wherein three gas drying tubes (2) are provided and are connected end to end in sequence, wherein the gas drying tube (2) at the end is connected to the combustion tube (13), and color-changing silica gel (6), alkali asbestos (7) and anhydrous magnesium perchlorate (9) are respectively provided in the three gas drying tubes (2) in the direction from the purification tube (5) to the combustion tube (13).

4. The device for measuring carbon content in zinc oxide enriched material according to claim 3, wherein: An oxygen flow meter (8) is also connected between the two gas drying tubes (2) containing the alkali asbestos (7) and the anhydrous magnesium perchlorate (9).

5. The device for measuring carbon content in zinc oxide enriched material according to claim 3, wherein: The combustion tube (13) is a straight tube with a fixed length and inner diameter, one end of which is connected to an air outlet (133) with an inner diameter smaller than the combustion tube's diameter, and the other end of which is a sample delivery port (131). An oxygen inlet (132) is differentially provided on the side surface of the combustion tube (13) adjacent to the sample delivery port (131), the oxygen inlet (132) is communicated with the last gas drying tube (2), the air outlet (133) is communicated with the electrolytic cell (16), a sample delivery assembly (10) is installed at the position of the sample delivery port (131), the combustion boat (12) is located between the oxygen inlet (132) and the air outlet (133), the oxide impurity remover (14) is located on one side of the combustion tube (13) close to the air outlet (133), and aluminum silicate wool (15) is also provided between the oxide impurity remover (14) and the air outlet (133) in the combustion tube (13).

6. The device for measuring carbon content in zinc oxide enriched material according to claim 5, characterized in that: The sample delivery component (10) includes a sealing plug (105) at the sample delivery port (131), a glass tube (103) is slidably provided on the inner side of the sealing plug (105), the glass tube (103) is in sealing contact with the sealing plug (105), the end of the glass tube (103) away from the combustion tube (13) is connected to a flip-up rubber cap (102), a silicone tube (104) is provided between the flip-up rubber cap (102) and the glass tube (103), a nickel-chromium wire push rod (101) is provided on the inner side of the glass tube (103), the two ends of the nickel-chromium wire push rod (101) extending out of the glass tube (103) have a length, the end of the nickel-chromium wire push rod (101) close to the inner side of the combustion tube (13) is provided with a curved hook (106), the other end of the nickel-chromium wire push rod (101) passes through the flip-up rubber cap (102) to the outside, and the nickel-chromium wire push rod (101) slides and is sealed in the flip-up rubber cap (102).

7. The device for measuring carbon content in zinc oxide enriched material according to claim 1, characterized in that: An electrolysis electrode (161) is provided on the outer surface of the electrolysis cell (16), and a plurality of electrode columns (162) are provided in a ring shape on the inner wall of the electrolysis cell (16) and are electrically connected to the electrolysis electrode (161). A pair of electrolysis electrodes (161) are provided, each of which is connected to the positive and negative poles of a power supply, respectively. The two groups of electrode columns (162) connected to the positive and negative poles of the power supply are staggered.

8. The device for measuring carbon content in zinc oxide enriched material according to claim 1, characterized in that: A nitrogen removal U-shaped tube (18) and a water absorption U-shaped tube (19) are further provided between the carbon dioxide removal U-shaped tube (20) and the electrolytic cell (16). Two carbon dioxide removal U-shaped tubes (20) are provided. The nitrogen removal U-shaped tube (18), the water absorption U-shaped tube (19) and the two carbon dioxide removal U-shaped tubes (20) are sequentially connected in series. A bubble meter (21) is further connected in series to one side of the last carbon dioxide removal U-shaped tube (20).

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