Method for measuring contents of silicon, magnesium and aluminum in coal combustion-supporting agent

A technology of coal combustion enhancer and determination method, which is applied in the field of chemical detection, can solve the problems of difficult content, etc., and achieve the effects of convenient operation, shortened detection cycle, and good stability

Active Publication Date: 2014-04-02
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using inductively coupled plasma atomic emission spectrometry to directly measure the content of silicon, magnesium, and aluminum in the combustion aid of coal catalytic combustion for blast furnace injection is relatively difficult, and there is no effective method at present

Method used

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  • Method for measuring contents of silicon, magnesium and aluminum in coal combustion-supporting agent
  • Method for measuring contents of silicon, magnesium and aluminum in coal combustion-supporting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare the following standard solutions as usual:

[0045] 1. Silicon standard solution:

[0046] 1A. Calcinate silicon dioxide with a purity of more than 99.9% at 1000°C for 1 hour, place it in a desiccator and cool it to room temperature;

[0047] 1B, according to the amount of 5g / g sample, place 1.0696g of silicon dioxide in step 3A in a platinum crucible containing 3g of mixed flux of anhydrous sodium carbonate and boric acid that is ground and mixed, and then cover with 2g of ground Fine and uniform mixed flux of anhydrous sodium carbonate and boric acid, heating the crucible at a low temperature of 400°C, and then heating at a high temperature of 950°C for 40 minutes, cooling, wherein the mixed flux is the following mass ratio: anhydrous sodium carbonate:boric acid=2 :1;

[0048] 1C. Put the platinum crucible in step 3B into a beaker filled with 100mL of cold water to leach the frit until completely dissolved, then take out the crucible, and cool the solution t...

Embodiment 2

[0077] 1. Preparation of silicon, magnesium and aluminum sample liquids in the catalytic combustion combustion aid of coal for blast furnace injection:

[0078] 1A. According to the amount of 20g / g sample, put 0.1000g of the sample to be tested in a nickel crucible with 2g of anhydrous sodium carbonate and sodium peroxide mixed flux mixed in advance, and mix well, wherein the mixed flux is as follows Mass ratio: anhydrous sodium carbonate: sodium peroxide=1:4;

[0079] 1B. Melt the nickel crucible in step 1A at 700°C for 5 minutes, take it out, and cool it down:

[0080] 1C, leaching the nickel crucible in step 1B with warm water, washing out the crucible to obtain a mixed solution;

[0081] 1D. In the mixed solution obtained in step 1C, use 5 mL / g of mixed flux, add 10 mL of hydrochloric acid to acidify, heat to dissolve salts, cool, and filter to obtain a solution;

[0082] 1E. According to the amount of 25L / g sample, add distilled water to the solution obtained in step 1D...

Embodiment 3

[0087] 1. Preparation of silicon, magnesium and aluminum sample liquids in the catalytic combustion combustion aid of coal for blast furnace injection:

[0088] 1A. According to the amount of 25g / g sample, place 0.1000g of the sample to be tested in a nickel crucible with 2.5g of mixed flux of anhydrous sodium carbonate and sodium peroxide added in advance, and mix well, wherein the mixed flux is Following mass ratio: anhydrous sodium carbonate: sodium peroxide=1:4;

[0089] 1B. Melt the nickel crucible in step 1A at 720°C for 6 minutes, take it out, and cool it down:

[0090] 1C, leaching the nickel crucible in step 1B with warm water, washing out the crucible to obtain a mixed solution;

[0091] 1D. In the mixed solution obtained in step 1C, use 3 mL / g of mixed flux, add 8 mL of hydrochloric acid to acidify, heat to dissolve salts, cool and filter to obtain a solution;

[0092] 1E. According to the amount of 25L / g sample, add distilled water to the solution obtained in ste...

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Abstract

The invention discloses a method for measuring contents of silicon, magnesium and aluminum in a coal combustion-supporting agent. The method comprises a pretreatment step and a measurement step and specifically comprises the following steps: adding a basic flux into a sample to be measured, placing the sample to be detected into a crucible to be uniformly mixed, heating and fusing, cooling, leaching the crucible by using 40-60 DEG C hot water, and cleaning the crucible to obtain a mixed solution a; acidifying, heating and dissolving, cooling and filtering to obtain a filtrate b; transferring the filtrate b to a volumetric flask, and setting the constant volume to obtain a sample solution; measuring the sample solution by using an emission spectroscopy; and obtaining the corresponding contents of the silicon, the magnesium and the aluminum in standard work curves of the silicon, the magnesium and the aluminum according to spectral line intensity. The method disclosed by the invention is convenient to operate and can be used for greatly shortening the detection period and reducing the labor intensity of detecting personnel; a measured result is favorable in stability, repeatability and accuracy; and the requirement for measuring the contents of the silicon, the magnesium and the aluminum in a coal catalytic combustion-supporting agent for daily injection of a blast furnace can be met.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and in particular relates to a method for determining the content of silicon, magnesium and aluminum in a coal combustion enhancer. Background technique [0002] It is an important technical means to reduce the production cost of pig iron, reduce environmental pollution and optimize the process structure to greatly increase the coal injection rate of blast furnace. The combustion performance of pulverized coal is the restrictive link to increase the coal injection ratio of blast furnace. In order to improve the combustion performance of the pulverized coal itself, the combustion rate of the pulverized coal injected into the blast furnace can be improved by adding an appropriate amount of combustion accelerant into the pulverized coal injected into the blast furnace. Moreover, a large number of industrial furnaces have been used in the field to prove that after the addition of combustio...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
Inventor 曾海梅陈涛孙肖媛赵绥李宏萍高玲高丽萍
Owner WUKUN STEEL
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