Method for detecting total iron content of steel slag

A detection method and technology for iron content, which are applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problems of inaccurate detection of total iron content and high detection cost, and achieve The effect of reducing human and environmental hazards, low detection cost, and simple calculation process

Active Publication Date: 2013-11-27
宝武环科南京资源利用有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the inaccurate detection of total iron content in steel slag and the high detection cost, the present invention creatively proposes a detection method suitable for total iron content in steel slag, which includes the following steps:

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  • Method for detecting total iron content of steel slag
  • Method for detecting total iron content of steel slag
  • Method for detecting total iron content of steel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] ①Sampling and sample preparation: Take about 5kg of slag steel powder mixed sample (grain size 0-8mm) on site. The sample is wet, and the sample is dried at 105℃±2℃. Mix the dried sample thoroughly, and use a dividing device to divide into two parts, each about 100g, and mark them as M 1 Sample and M 2 Sample. The two samples were crushed several times by the crushing sample preparation machine, and all the samples passed through a 0.075mm standard sieve, and were bagged for use.

[0037] ②Weigh 0.5g sample accurately with analytical balance, accurate to 0.0001g, where M 1 Sample 0.5038g, M 2 The sample is 0.5011g. ③Analysis method: Put the samples in a 400ml beaker, add a little water to moisten, add 30ml of concentrated hydrochloric acid and then add 2ml of nitric acid dropwise, heat at high temperature until all the samples are dissolved, if there is a little undissolved sample, add 1g of fluorine Sodium sulfide, after the sample is completely dissolved, remove the run...

Embodiment 2

[0052] ①Sampling and sample preparation: Take about 1.5kg of slag steel powder mixed sample (grain size 0-8mm) on site, and the sample is wet, and the sample is dried at a temperature of 105℃±2℃. Mix the dried sample thoroughly,

[0053] ②Accurately weigh 0.5g sample with analytical balance, accurate to 0.0001g, M 1 The actual weight of the sample is 0.5085 g.

[0054] ③Analysis method: Put the samples in a 400ml beaker, add a little water to moisten, add 30ml of concentrated hydrochloric acid and then add 2ml of nitric acid dropwise, heat at high temperature until all the samples are dissolved, if there is a little undissolved sample, add 1g of fluorine Sodium sulfide, after the sample is completely dissolved, remove the running water and cool to room temperature, and dilute to a 250ml volumetric flask. Draw 25ml of the solution into a 300ml beaker, add water to dilute to about 100ml, adjust the pH of the solution between 1.8 and 2.0 with ammonia (1+1) and hydrochloric acid (1+1)...

Embodiment 3

[0066] ①Sampling and sample preparation: Take about 1.385kg of slag steel powder mixed sample (grain size 0-8mm) on site. The sample is wet, and the sample is dried at 105℃±2℃. The dried samples are mixed thoroughly, all crushed and passed through a 1.25mm sieve. The magnetic iron weighing 0.455kg is absorbed by a magnetic block of +1.25mm (the upper part of the 1.25mm sieve), and the magnetic iron is calculated to account for 32.85%.

[0067] ②Use the above method to obtain -1.25mm (1.25mm under the sieve) sample: use an analytical balance to accurately weigh 0.5g sample, accurate to 0.0001g, M 2 The actual weight of the sample is 0.5013g.

[0068] ③Analysis method: Put the samples in a 400ml beaker, add a little water to moisten, add 30ml of concentrated hydrochloric acid and then add 2ml of nitric acid dropwise, heat at high temperature until all the samples are dissolved, if there is a little undissolved sample, add 1g of fluorine Sodium sulfide, after the sample is completely ...

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Abstract

The invention relates to the field of detection, in particular to the field of steel slag detection and more particularly relates to a method for detecting the total iron content of steel slag. Aim at the problems of inaccurate detection to the content of total iron in steel slag and high detection cost at present, the invention innovatively provides the method for detecting the total iron content of the steel slag. The method comprises three main procedures of sample preparation by breaking, decomposition and element content measurement. Through the adoption of the method, the total iron content of the steel slag can be economically, quickly, effectively and accurately measured.

Description

Technical field [0001] The invention relates to the detection field, in particular to the detection field of steel slag, and more specifically to a detection method suitable for the total iron content in the steel slag. Background technique [0002] With the rapid development of the steel industry, a large amount of steel slag is produced in the steelmaking production process. With the recycling of resources, this steel slag is often returned to a certain link in the steel and used as an auxiliary material again, such as grinding steel slag into powder as a sintering additive Returning to production and use again, the key indicator of this product is the determination of the total iron content in the sample. [0003] At present, the detection methods for total iron content in natural iron ore, iron concentrate and lump ore, including sintered ore, and pellets are relatively mature, mainly including potassium dichromate titration and X-ray fluorescence spectrometry. The potassium d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 陈刚
Owner 宝武环科南京资源利用有限公司
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