A method for verifying the spraying state of the gunning material along the molten iron tank

Abstract

The present invention provides a method for verifying the spraying state of the gunning material along the edge of a molten iron tank, which specifically includes the following steps: preparing a hard plastic bottle with a smooth inner wall; first dry-mixing the gunning material along the edge of the experimental molten iron tank, and then adding water for wet mixing; putting the mixed material into the hard plastic bottle, placing it on a vibration table, adding material while vibrating until it is full, and stopping the vibration; inverting the hard plastic bottle filled with the gunning material and fixing it on the bracket of a jumping table, starting the jumping table, recording the number of vibrations of the jumping table, and observing the discharge state: if the gunning material falls out in a continuous column at one time, and the number of vibrations of the jumping table is ≤8 times, then the spraying state of the gunning material is qualified, otherwise it is unqualified. The present invention can effectively select the gunning material along the edge of the molten iron tank whose spraying state meets the requirements of the gunning construction, and avoid gunning material blocking, panting and uneven discharge.

Description

Technical Field

[0001] The invention relates to the technical field of refractory gunning materials, and in particular to a method for verifying the spraying state of gunning materials along a molten iron tank. Background Art

[0002] The gunning machine for large iron ladle is generally a pneumatic semi-dry gunning machine. Since the temperature of the iron ladle is high and the construction workers cannot get close to the iron ladle, the gunning machine's spray gun is relatively long, more than 8 meters in length. Because the slender gun often causes problems such as gun blocking, panting, and uneven discharge of the gunning material, it seriously affects the efficiency and quality of the gunning construction. Therefore, the requirements for the spraying state of the gunning material on the edge of the iron ladle are relatively strict. However, the existing test equipment and test methods do not have specific test standards and test methods for the spraying state of the gunning material on the edge of the iron ladle, making it difficult to verify whether the gunning material product meets the requirements of the gunning construction. Summary of the invention

[0003] The purpose of the present invention is to provide a method for verifying the spraying state of gunning material along the molten iron ladle, which can select gunning material along the molten iron ladle whose spraying state meets the requirements of gunning construction, and avoid gunning material blocking, gasping and uneven discharge.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for verifying the spraying state of a molten iron tank along a gunning material includes the following steps:

[0006] 1) Prepare a hard plastic bottle with a smooth inner wall and fix a handle on the outside of the hard plastic bottle;

[0007] 2) Dry mix the gunning material in the experimental molten iron tank first, then add water for wet mixing;

[0008] 3) Put the mixed material in step 2) into a hard plastic bottle, place it on a vibration table, add material while vibrating until it is full, and stop vibrating;

[0009] 4) Install a bracket on the jumping table, invert the hard plastic bottle filled with gunning material and fix the handle on the bracket, start the jumping table, record the number of vibrations of the jumping table, and observe the discharge status: if the gunning material falls out in a continuous column at one time, and the number of vibrations of the jumping table is ≤8 times, the spraying status of the gunning material is qualified, otherwise it is unqualified.

[0010] In the above step 2), the dry mixing time is 1 to 2 minutes, the amount of water added is 13% to 18% of the mass of the gunning material, and the wet mixing time is 3 to 5 minutes.

[0011] The hard plastic bottle is an open transparent hard plastic bottle with a diameter of 40 mm to 50 mm, a height of 180 mm to 250 mm and a handle at one end.

[0012] In the above step 4), the vibration frequency of the jumping table is 1 Hz to 2 Hz, and the up and down vibration stroke is 10 mm ± 0.2 mm.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) The test is carried out using the conventional equipment in the refractory enterprise laboratory, such as the vibration table for concrete testing and the jumping table method flow value detection equipment, without the need for additional equipment.

[0015] 2) This method has accurate counting and is convenient for comparison and judgment.

[0016] 3) This method is simple to operate, fast and effective.

[0017] 4) The present invention can effectively select the gunning material for the molten iron tank edge whose spraying state meets the construction requirements, thereby avoiding gun blocking, gasping and uneven discharge of the gunning material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the hard plastic bottle of the present invention.

[0019] Figure 2 for Figure 1 AA view.

[0020] Figure 3 Schematic diagram of a plastic bottle on a vibration table.

[0021] Figure 4 A diagram showing a plastic bottle placed upside down on a jumping table.

[0022] Figure 5 Schematic diagram of the spraying material in the plastic bottle falling onto the jumping table.

[0023] In the figure: 1-hard plastic bottle, 2-handle, 3-gunning material, 4-vibrating table, 5-bracket, 6-jump table. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention are further described below:

[0025] A method for verifying the spraying state of a molten iron tank along a gunning material includes the following steps:

[0026] 1) Prepare a hard plastic bottle 1 with a smooth inner wall, and fix a handle 2 on the outer side of the hard plastic bottle 1;

[0027] 2) Dry mix the gunning material in the experimental molten iron tank first, then add water for wet mixing;

[0028] 3) Put the mixed material in step 2) into a hard plastic bottle 1, place it on a vibration table 4, add material while vibrating, until it is full, and stop vibrating;

[0029] 4) Install a bracket 5 on the jumping table 6, invert the hard plastic bottle 1 filled with gunning material and fix the handle 2 on the bracket 5, start the jumping table 6, record the number of vibrations of the jumping table 6, and observe the discharge status: if the gunning material falls out in a continuous column at one time, and the number of vibrations of the jumping table 6 is ≤8 times, the spraying status of the gunning material is qualified, otherwise it is unqualified.

[0030] In the above step 2), the dry mixing time is 1 to 2 minutes, the amount of water added is 13% to 18% of the mass of the gunning material, and the wet mixing time is 3 to 5 minutes.

[0031] The hard plastic bottle is an open transparent hard plastic bottle with a diameter of 40 mm to 50 mm, a height of 180 mm to 250 mm and a handle at one end.

[0032] In the above step 4), the vibration frequency of the jumping table is 1 Hz to 2 Hz, and the up and down vibration stroke is 10 mm ± 0.2 mm.

[0033] Embodiment 1:

[0034] Weigh 650g of waste clay brick particles, 150g of alumina fine powder, 60g of ball clay, 100g of alumina cement, 10g of high-temperature asphalt powder, 25g of silica powder, and 5g of sodium carboxymethyl cellulose. Weigh the above raw materials and add them into a cement mortar mixer, dry mix for 1 minute, add 150ml of pure water, and wet mix for 3 minutes.

[0035] The mixed gunning material is put into a transparent hard plastic bottle 1, and the transparent hard plastic bottle 1 is placed on a vibration table 4. The gunning material is added into the transparent hard plastic bottle 1 while vibrating until no more gunning material can be added, and then the vibration is stopped.

[0036] Mount the bracket 5 on the jumping table 6, invert the transparent hard plastic bottle 1 filled with gunning material and fix the handle 2 on the bracket 5 of the jumping table 6, start the jumping table 6, and the jumping table 6 vibrates up and down with a stroke of 10mm±0.2mm and a vibration frequency of 1Hz. When vibrating 6 times, the gunning material falls out all at once and presents a continuous column.

[0037] When the gunning material is used for gunning construction on the edge of a molten iron tank, the gunning material is sprayed continuously, and the discharge is smooth and even. There are no problems such as gun blockage, gasping, and uneven discharge, which meets the construction requirements.

[0038] Embodiment 2:

[0039] Weigh 600g of waste clay brick particles, 200g of waste clay brick fine powder, 90g of Guangxi white clay, 100g of alumina cement, and 10g of sodium carboxymethyl cellulose. Weigh the above raw materials and add them into a cement mortar mixer, dry mix for 1 minute, add 150ml of pure water, and wet mix for 3 minutes.

[0040] The mixed gunning material is put into a transparent hard plastic bottle 1, and the transparent hard plastic bottle 1 is placed on a vibration table 4. The gunning material is added into the transparent hard plastic bottle 1 while vibrating until no more gunning material can be added, and then the vibration is stopped.

[0041] Mount the bracket 5 on the jumping table 6, invert the transparent hard plastic bottle 1 filled with gunning material and fix the handle 2 on the bracket 5 of the jumping table 6, start the jumping table 6, and the jumping table 6 vibrates up and down with a stroke of 10mm±0.2mm and a vibration frequency of 1Hz. When vibrating 10 times, one third of the gunning material falls out; when vibrating 18 times, one quarter of the gunning material falls out; when vibrating 20 times, all the remaining gunning material falls out.

[0042] This gunning material cannot be used for gunning the edge of a molten iron ladle. Problems such as gun blockage, gasping, and uneven material discharge may easily occur, seriously affecting construction operations.

[0043] Embodiment 3:

[0044] Weigh 660g of waste high-alumina brick particles, 90g of waste high-alumina brick fine powder, 60g of Shanxi soft clay, 100g of alumina cement, 60g of waste torpedo tank brick powder, 25g of silica powder, and 5g of sodium carboxymethyl cellulose. Weigh the above raw materials and add them into a cement mortar mixer, dry mix for 1 minute, add 160ml of pure water, and wet mix for 4 minutes.

[0045] The mixed gunning material is put into a transparent hard plastic bottle 1, and the transparent hard plastic bottle 1 is placed on a vibration table 4. The gunning material is added into the transparent hard plastic bottle 1 while vibrating until no more gunning material can be added, and then the vibration is stopped.

[0046] Mount the bracket 5 on the jumping table 6, invert the transparent hard plastic bottle 1 filled with gunning material and fix the handle 2 on the bracket 5 of the jumping table 6, start the jumping table 6, and the jumping table 6 vibrates up and down with a stroke of 10mm±0.2mm and a vibration frequency of 1Hz. When vibrating 6 times, the gunning material falls out all at once and presents a continuous column.

[0047] When the gunning material is used for gunning construction on the edge of a molten iron tank, the gunning material is sprayed continuously, and the discharge is smooth and even. There are no problems such as gun blockage, gasping, and uneven discharge, which meets the construction requirements.

[0048] Embodiment 4:

[0049] Weigh 640g of waste skateboard brick particles, 150g of waste skateboard brick fine powder, 80g of ball clay, 100g of alumina cement, 25g of silica powder, and 5g of sodium carboxymethyl cellulose. Weigh the above raw materials and add them into a cement mortar mixer, dry mix for 1 minute, add 170ml of pure water, and wet mix for 4 minutes.

[0050] The mixed gunning material is put into a transparent hard plastic bottle 1, and the transparent hard plastic bottle 1 is placed on a vibration table 4. The gunning material is added into the transparent hard plastic bottle 1 while vibrating until no more gunning material can be added, and then the vibration is stopped.

[0051] Mount the bracket 5 on the jumping table 6, invert the transparent hard plastic bottle 1 filled with gunning material and fix the handle 2 on the bracket 5 of the jumping table 6, start the jumping table 6, and the jumping table 6 vibrates up and down with a stroke of 10mm±0.2mm and a vibration frequency of 1Hz. When vibrating 5 times, the gunning material falls out all at once and presents a continuous column.

[0052] When the gunning material is used for gunning construction on the edge of a molten iron tank, the gunning material is sprayed continuously, and the discharge is smooth and even. There are no problems such as gun blockage, gasping, and uneven discharge, which meets the construction requirements.

[0053] Embodiment 5:

[0054] Weigh 635g of waste aluminum silicon carbide carbon brick particles, 155g of waste aluminum silicon carbide carbon brick fine powder, 80g of ball clay, 100g of alumina cement, 25g of silica powder, and 5g of sodium carboxymethyl cellulose. Weigh the above raw materials and add them into a cement mortar mixer, dry mix for 1 minute, add 175ml of pure water, and wet mix for 4 minutes.

[0055] The mixed gunning material is put into a transparent hard plastic bottle 1, and the transparent hard plastic bottle 1 is placed on a vibration table 4. The gunning material is added into the transparent hard plastic bottle 1 while vibrating until no more gunning material can be added, and then the vibration is stopped.

[0056] Mount the bracket 5 on the jumping table 6, invert the transparent hard plastic bottle 1 filled with gunning material and fix the handle 2 on the bracket 5 of the jumping table 6, start the jumping table 6, and the jumping table 6 vibrates up and down with a stroke of 10mm±0.2mm and a vibration frequency of 1Hz. When vibrating 4 times, the gunning material falls out all at once and presents a continuous column.

[0057] When the gunning material is used for gunning construction on the edge of a molten iron tank, the gunning material is sprayed continuously, and the discharge is smooth and even. There are no problems such as gun blockage, gasping, and uneven discharge, which meets the construction requirements.

Claims

1. A method for verifying the spraying state of the gunning material along the molten iron tank, characterized in that: The specific steps include: 1) Prepare a hard plastic bottle with a smooth inner wall and fix a handle on the outside of the hard plastic bottle; 2) Dry mix the gunning material in the experimental molten iron tank first, then add water for wet mixing; 3) Put the mixed material in step 2) into a hard plastic bottle, place it on a vibration table, add material while vibrating until it is full, and stop vibrating; 4) Install a bracket on the jumping table, invert the hard plastic bottle filled with gunning material and fix the handle on the bracket, start the jumping table, record the number of vibrations of the jumping table, and observe the discharge status: if the gunning material falls out all at once in a continuous column, and the number of vibrations of the jumping table is ≤8 times, the spraying status of the gunning material is qualified, otherwise it is unqualified.

2. A method for verifying the spraying state of the molten iron tank along the gunning material according to claim 1, characterized in that: In the above step 2), the dry mixing time is 1 to 2 minutes, the amount of water added is 13% to 18% of the mass of the gunning material, and the wet mixing time is 3 to 5 minutes.

3. The method for verifying the spraying state of the molten iron tank along the gunning material according to claim 1 is characterized in that: The hard plastic bottle is an open transparent hard plastic bottle with a diameter of 40 mm to 50 mm, a height of 180 mm to 250 mm and a handle at one end.

4. The method for verifying the spraying state of the molten iron tank along the gunning material according to claim 1 is characterized in that: In the above step 4), the vibration frequency of the jumping table is 1 Hz to 2 Hz, and the up and down vibration stroke is 10 mm ± 0.2 mm.

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