Emulsion explosive water-phase unqualified product adjusting method

Abstract

The invention relates to a method for adjusting water-phase unqualified products of emulsion explosives. The method comprises the following steps: testing water-phase crystallization points of the unqualified products; when the crystallization point is higher than the standard crystallization point, the water adding amount is equal to crystallization point temperature difference * water phase mass * (0.28-0.32)%; when the devitrification point is lower than the standard devitrification point, the reinforcing material amount is equal to devitrification point temperature difference * water phase mass * (2.48-2.52)%; the solid material comprises ammonium nitrate and sodium nitrate in a mass ratio of 82: (6-7), preferably 82: 6.5. According to the method, an adjusting empirical formula of the emulsion explosive water-phase unqualified product is summarized, the method is suitable for emulsion explosives using ammonium nitrate as a main raw material, the crystallization point of the water-phase solution can be accurately adjusted, the water-phase quality is guaranteed, waste is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of emulsion explosive production, and in particular to a method for regulating unqualified water phase emulsion explosives. Background Art

[0002] The water phase of emulsion explosives is generally prepared by dissolving ammonium nitrate and sodium nitrate in water to prepare an aqueous solution. In addition, a small amount of additives can be added to adjust the water phase crystallization point, pH and other indicators. Since the water phase is produced by tons in industrial production and has a large volume, the crystallization point of the water phase solution may not be within the required range due to feeding errors during the preparation process, making the batch of water phase solution a defective product. Subsequent adjustments can be made to return the crystallization point of the defective products to the required range, but adding too much or too little material during the adjustment will significantly affect the crystallization point. This ratio should be as accurate as possible, and it is also necessary to ensure that the adjustment of the crystallization point has little effect on other indicators of the water phase. Summary of the invention

[0003] In order to achieve accurate regulation of unqualified products in the water phase of emulsion explosives, improve production efficiency and reduce waste, the present invention provides a regulation method.

[0004] The specific technical solution adopted is: a method for adjusting unqualified products of emulsion explosive water phase, comprising:

[0005] Test the crystallization point of water phase of unqualified products;

[0006] When the crystallization point is higher than the standard crystallization point, the amount of water added = crystallization point temperature difference × water phase mass × (0.28-0.32)%;

[0007] When the crystallization point is lower than the standard crystallization point, the amount of reinforcement material = crystallization point temperature difference × water phase mass × (2.48-2.52)%;

[0008] The solid material includes ammonium nitrate and sodium nitrate, and the mass ratio of the two is 82: (6-7), and the preferred ratio is 82: 6.5.

[0009] Furthermore, the standard crystallization point is 80°C-82°C. The crystallization point temperature difference is the temperature difference between the crystallization point obtained by the test and the standard crystallization point. A small crystallization point will affect the detonation velocity and other properties of the emulsion explosive, and may even cause the emulsion explosive to fail to detonate. A high crystallization point will cause the explosive to be unstable, so the crystallization point needs to be controlled within the standard range.

[0010] Furthermore, after the adjustment is completed, the pH value of the aqueous solution is tested. The standard pH value is 4.0-5.0. If it is not within the standard range, a weak acid or weak alkaline substance is added for adjustment. The molar amount of hydrogen ions that need to be consumed or supplemented is calculated based on the current pH difference, thereby determining the amount of weak acid or weak alkaline substance that needs to be added.

[0011] Further, after the adjustment is completed, the density of the aqueous solution is tested, and the standard density is 1.43-1.45 g / cm 3 If it is not within the standard range, add water or solid material to adjust. Generally, if the crystallization point is within the standard range, the solution density will not exceed the standard density and generally no adjustment is required.

[0012] Furthermore, the temperature of the aqueous solution is 90°C-100°C.

[0013] Furthermore, the unqualified aqueous solution is continuously kept warm by steam.

[0014] Furthermore, after adding water or reinforcing material, the rotation speed is maintained at 55-65r / min for stirring.

[0015] Furthermore, the weakly acidic substance includes any one or more of acetic acid, oxalic acid, propionic acid or carbonic acid.

[0016] Furthermore, the weakly alkaline substance includes any one or two of sodium acetate, sodium carbonate or sodium bicarbonate.

[0017] The invention summarizes an empirical formula for adjusting unqualified products of the water phase of emulsion explosives, which is applicable to emulsion explosives using ammonium nitrate as a main raw material, can achieve precise adjustment of the crystallization point of the water phase solution, ensure the quality of the water phase, reduce waste and improve production efficiency. DETAILED DESCRIPTION

[0018] The following examples are provided for a better understanding of the present invention, and are not intended to limit the best embodiment, nor to limit the content and scope of the present invention. It is not necessary and impossible to list all embodiments here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

[0019] Example 1

[0020] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 10t of water phase, comprising:

[0021] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0022] The crystallization point is 84°C, which is 82°C higher. Water is added to the water phase. The amount of water added = crystallization point temperature difference × water phase mass × 0.3% = 2 × 10 × 0.3% = 0.06t = 60kg;

[0023] After adding water, the speed was kept at 55r / min for stirring for 10 minutes, and samples were taken. The solution was shaken manually and the crystallization point was measured to be 82°C. The pH was tested by precision pH test paper and the pH was 4.5. The density was tested by the density meter in the flow meter and the density was 1.43g / cm 3 .

[0024] Example 2

[0025] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 10t of water phase, comprising:

[0026] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0027] The crystallization point is 79°C, which is lower than 80°C. The solid material is added to the water phase. The amount of solid material = crystallization point temperature difference × water phase mass × 2.5% = 1 × 10 × 2.5% = 0.25t = 250kg. The solid material includes ammonium nitrate and sodium nitrate, and the mass ratio of the two is 82:6.5.

[0028] After reinforcing the material, the speed was maintained at 60r / min for stirring for 10 minutes, sampling was performed, and the solution was manually shaken. The crystallization point was measured to be 81°C, the pH was tested by precision pH test paper to be 4, and the density was tested by the density meter in the flow meter to be 1.45g / cm 3 .

[0029] Example 3

[0030] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 1 t of water phase, comprising:

[0031] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0032] The crystallization point is 79°C, which is lower than 80°C. The solid material is added to the water phase. The amount of solid material = crystallization point temperature difference × water phase mass × 2.51% = 1 × 1 × 2.51% = 0.0251t = 25.1kg. The solid material includes ammonium nitrate and sodium nitrate, and the mass ratio of the two is 82:6.

[0033] After reinforcing the material, keep the speed at 60r / min and stir for 10min, take samples, shake the solution manually, and measure the crystallization point to be 81℃. The pH value is 3.8 as measured by precision pH test paper. Add 4.24g sodium carbonate to adjust the pH value to 4. The density is 1.44g / cm3 as measured by the density meter in the flow meter. 3 .

[0034] Example 4

[0035] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 1 t of water phase, comprising:

[0036] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0037] The crystallization point is 83°C, which is higher than 82°C. Water is added to the water phase. The amount of water added = crystallization point temperature difference × water phase mass × 0.28% = 1 × 1 × 0.28% = 0.0028t = 2.8kg;

[0038] After reinforcing the material, the speed was maintained at 65r / min for stirring for 10 minutes, sampling was performed, and the solution was manually shaken. The crystallization point was measured to be 81°C, the pH was tested by precision pH test paper to be 4.6, and the density was tested by the density meter in the flow meter to be 1.44g / cm 3 .

[0039] Example 5

[0040] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 1 t of water phase, comprising:

[0041] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0042] The crystallization point is 78°C, which is lower than 80°C. The solid material is added to the water phase. The amount of solid material = crystallization point temperature difference × water phase mass × 2.51% = 2 × 1 × 2.51% = 0.0502t = 50.2kg; the solid material includes ammonium nitrate: sodium nitrate, and the mass ratio of the two is 82:6.2.

[0043] After reinforcing the material, the speed was maintained at 65r / min for stirring for 10 minutes, sampling was performed, and the solution was manually shaken. The crystallization point was measured to be 81°C, the pH was tested by precision pH test paper to be 4.6, and the density was tested by the density meter in the flow meter to be 1.44g / cm 3 .

[0044] Comparative Example 1

[0045] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 1 t of water phase, comprising:

[0046] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0047] The crystallization point is 79°C, which is lower than 80°C. The solid material is added to the water phase. The amount of solid material = crystallization point temperature difference × water phase mass × 2.46% = 1 × 1 × 2.46% = 0.0246t = 24.6kg. The solid material includes ammonium nitrate and sodium nitrate, and the mass ratio of the two is 82:6.

[0048] After reinforcing the material, the speed was kept at 60r / min for stirring for 10 minutes, sampling was performed, and the solution was manually shaken. The crystallization point was measured to be 79°C, which was not adjusted to the standard crystallization point. The pH was tested by precision pH test paper and the pH was 4.1. The density was tested by the density meter in the flow meter and the density was 1.44g / cm 3 .

[0049] Comparative Example 2

[0050] A method for regulating unqualified emulsion explosive water phase products, with a total amount of 1 t of water phase, comprising:

[0051] Steam is introduced through the steam control device to keep the water phase warm and maintain the water phase temperature at 95°C. Test the crystallization point of the water phase of unqualified products: take samples, shake the water phase solution manually, and observe the temperature when the crystals precipitate. The standard crystallization point is 80°C-82°C.

[0052] The crystallization point is 83°C. Water is added to the water phase. The amount of water added = crystallization point temperature difference × water phase mass × 0.34% = 1 × 1 × 0.34% = 0.0034t = 3.4kg;

[0053] After reinforcing the material, the speed was kept at 60r / min for stirring for 10 minutes, sampling was performed, and the solution was manually shaken. The crystallization point was measured to be 79°C, which was not adjusted to the standard crystallization point. The pH was tested by precision pH test paper and the pH was 4.9. The density was tested by the density meter in the flow meter and the density was 1.43g / cm 3 .

Claims

1. A method for regulating unqualified products of emulsion explosive water phase, characterized in that: include: Test the crystallization point of water phase of unqualified products; When the crystallization point is higher than the standard crystallization point, the amount of water added = crystallization point temperature difference × water phase mass × (0.28-0.32)%; When the crystallization point is lower than the standard crystallization point, the amount of reinforcement material = crystallization point temperature difference × water phase mass × (2.48-2.52)%; The solid material includes ammonium nitrate and sodium nitrate, and the mass ratio of the two is 82: (6-7).

2. A method for adjusting unqualified emulsion explosive water phase products according to claim 1, characterized in that: The standard crystallization point is 80°C-82°C.

3. A method for adjusting unqualified emulsion explosive water phase products according to claim 1, characterized in that: After the adjustment is completed, the pH value of the aqueous phase solution is tested. The standard pH value is 4.0-5.

0. If it is not within the standard range, a weak acid or weak alkaline substance is added for adjustment.

4. A method for adjusting unqualified emulsion explosive water phase products according to claim 1, characterized in that: After the adjustment is completed, the density of the aqueous solution is tested, and the standard density is 1.43-1.45 g / cm 3 If it is not within the standard range, add water or solid material for adjustment.

5. The method for adjusting unqualified emulsion explosive water phase products according to claim 1, characterized in that: The temperature of the aqueous phase solution is 90°C-100°C.

6. A method for adjusting unqualified emulsion explosive water phase products according to claim 1, characterized in that: The aqueous phase solution of the unqualified product is continuously kept warm by steam.

7. A method for adjusting unqualified emulsion explosive water phase products according to claim 1, characterized in that: After adding water or reinforcing material, the rotation speed is maintained at 55-65r / min for stirring.

8. A method for adjusting unqualified emulsion explosive water phase products according to claim 3, characterized in that: The weakly acidic substance includes any one or more of acetic acid, oxalic acid, propionic acid or carbonic acid.

9. A method for regulating unqualified emulsion explosive water phase products according to claim 3, characterized in that: The weakly alkaline substance includes any one or two of sodium acetate, sodium carbonate or sodium bicarbonate.