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A method for detecting whether the pH value of ammonium nitrate solution in emulsion explosives is qualified

A technology of ammonium nitrate solution and emulsified explosives, which is applied in the fields of testing pH value and using chemical indicators for analysis, etc. It can solve the problems of high cost and high unit price of instruments, and achieve the effects of low cost, fast color development speed and convenient transportation

Active Publication Date: 2020-09-29
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the electrodes are consumables and the unit price of the instrument is high, the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The ammonium nitrate solution A configured on a certain job site is divided into three parts, the test temperature is: 30°C, and the method of the present invention is used to test:

[0042] 1. Add 2-3 drops of dimethyl yellow indicator to the first ammonium nitrate solution A. After shaking well, the color of ammonium nitrate solution A gradually turns orange, and it is judged that the pH value of the solution to be tested is less than 4.0;

[0043] 2. Add 2-3 drops of bromocresol green indicator to the second part of ammonium nitrate solution A. After shaking well, the color of ammonium nitrate solution A turns yellow-green, indicating that the pH value of the solution to be tested is greater than 3.8; thus , it can be judged through the above two steps that the ammonium nitrate solution A is a qualified ammonium nitrate solution, suitable for making emulsion explosives;

[0044] 3. In order to further narrow the pH range of the solution to be tested, add 2-3 drops of...

Embodiment 2

[0047] The ammonium nitrate solution B configured on a job site is divided into three parts, the test temperature is: 33°C, and the method of the present invention is used to test:

[0048] 1. Add 2-3 drops of dimethyl yellow indicator to the first ammonium nitrate solution B, and after shaking well, the color of ammonium nitrate solution B gradually turns orange, judging that the pH value of the solution to be tested is less than 4.0;

[0049] 2. Add 2-3 drops of bromocresol green indicator to the second part of ammonium nitrate solution B. After shaking well, the color of ammonium nitrate solution B turns yellow-green, indicating that the pH value of the solution to be tested is greater than 3.8; thus , it can be judged by the above two steps that the ammonium nitrate solution B is a qualified ammonium nitrate solution, suitable for making emulsion explosives;

[0050] 3. In order to further narrow the pH value range of the solution to be tested, add 2-3 drops of bromocresol...

Embodiment 3

[0053] The ammonium nitrate solution C configured on a certain job site is divided into three parts, the test temperature is: 35°C, and the method of the present invention is used to test:

[0054] 1. Add 2-3 drops of dimethyl yellow indicator to the first ammonium nitrate solution C. After shaking well, the color of ammonium nitrate solution C turns red, indicating that the pH value of the solution is less than 2.9, and judge the ammonium nitrate solution C is an unqualified ammonium nitrate solution, which is not suitable for emulsion explosives.

[0055] 2. Add 0.5ml of NaHCO to ammonium nitrate solution C 3 Solution and the solution after adjusting the pH value is divided into two parts; add 2-3 drops of dimethyl yellow indicator to one of them, and after shaking well, the color of ammonium nitrate solution C turns orange, indicating that after adjusting the pH value The pH value of ammonium nitrate solution C is less than 4.0;

[0056] 3. In order to further narrow the ...

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Abstract

The invention discloses a method for rapidly detecting whether pH value of an ammonium nitrate solution in the preparation of emulsion explosive is qualified, and belongs to the technical field of explosive manufacturing. The method of the invention comprises the following steps: (1) an ammonium nitrate solution to be measured is fetched and divided into several parts, a dimethyl yellow indicatoris added into a first part, and a bromocresol green indicator is added into a second part; and (b) whether pH value of the ammonium nitrate solution to be measured is qualified is judged according todiscoloration situation of the solution to be measured; when the first part of solution to be measured turns orange and the second part of solution to be measured turns yellow-green, it shows that thesolution to be measured is qualified; otherwise, the solution to be measured is unqualified. According to the invention, whether pH value of the solution is within a reasonable range is convenientlyjudged. By the method, cost is reduced, work efficiency is further raised, and new thinking is provided for on-line monitoring of pH value.

Description

technical field [0001] The invention relates to a method for detecting the specific pH value range of ammonium nitrate solution, and belongs to the technical field of blasting equipment manufacturing. Background technique [0002] At present, the crushing of rock and coal mainly relies on blasting methods, and the blasting methods mainly include throwing blasting, pre-splitting blasting and loose blasting. [0003] Since 2007, Zhuneng Explosives Factory has introduced the advanced technology formula of Orica Company in Australia. Its core technology is: latex matrix preparation adopts low temperature, normal pressure, low speed and large gap emulsification technology, leading the development direction of industry technology. The main characteristics of this process are: Combining automation technology and explosives production technology closely, realize DCS in control; realize automatic chain protection in safety; advanced latex matrix preparation technology and matching hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/22
CPCG01N31/221
Inventor 赵瑞玺郭占江李福平张继东王建英张润和刘俊梅
Owner CHINA SHENHUA ENERGY CO LTD
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