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Measurement of steel slag age

A technology for rapid determination of steel slag, applied in measuring devices, chemical method analysis, instruments, etc., can solve problems such as lack of steel slag stability, and achieve the effect of increasing added value

Inactive Publication Date: 2008-01-30
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of technological transformation of my country's iron and steel enterprises, my country's iron and steel enterprises have basically realized the transition of "flat to transformation", but at the same time we lack an indicator to measure the stability of steel slag

Method used

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  • Measurement of steel slag age

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Accurately weigh 0.2g of the steel slag to be tested in a dry 50mL beaker, add 20mL of ethylene glycol, put in a constant temperature water bath at a super constant temperature of 90°C for 5min, insert an electrode to measure the conductivity, and determine the content of free calcium oxide by the calculation formula 2.019 %. The age of the steel slag is 15 months from the relationship diagram of the free calcium oxide content of the steel slag and the storage period of the steel slag in saturated water vapor at a temperature greater than 100°C.

Embodiment 2

[0043] Example 2 Accurately weigh 0.2g of the steel slag to be tested in a dry 50mL beaker, add 20mL of ethylene glycol, put in a constant temperature water bath at a super constant temperature of 90°C for 5min, insert an electrode to measure the conductivity, and determine the content of free calcium oxide by calculation formula 2.0514 %. The age of the steel slag is 11 months obtained from the relationship diagram between the free calcium oxide content of the steel slag and the storage period of the steel slag in saturated water vapor at a temperature greater than 100°C.

Embodiment 3

[0044] Example 3 Accurately weigh 0.2g of the steel slag to be tested in a dry 50mL beaker, add 20mL of ethylene glycol, put in a constant temperature water bath at a super constant temperature of 90°C for 5min, insert an electrode to measure the conductivity, and use the calculation formula to determine the content of free calcium oxide 2.0313 %. The age of the steel slag is 12 months obtained from the relationship diagram between the free calcium oxide content of the steel slag and the storage period of the steel slag in saturated water vapor at a temperature greater than 100°C.

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Abstract

A method for determining age of slag analyzes out content of free calcium oxide in tested sample by utilizing fast determining method and obtains age of slag by checking relation chart of free calcium oxide in slag to storing period of slag in saturated steam at temperature of greater than 100 degree according to free calcium oxide content analyzed out from tested sample.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a method for measuring the age of steel slag by measuring the content of free calcium oxide (f-CaO) in steel slag. Background technique [0002] Steel slag is a solid waste discharged during the steelmaking process, which has characteristics different from those of general ferrous inorganic non-metallic materials, calcareous inorganic non-metallic materials and siliceous inorganic non-metallic materials, as follows: [0003] 1. Chemical composition of steel slag [0004] Since my country's steel slag is mainly produced from converters, the chemical composition of steel slag is roughly shown in Table 1. [0005] Chemical composition of converter steel slag Table 1 [0006] Element CaO SiO 2 al 2 o 3 FeO Fe 2 o 3 MgO P 2 o 6 MnO f-CaO Content (%) 40-60 10-20 1-5 7-10 5-10 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/06G01N31/00
Inventor 朱跃刚程勇甘万贵李灿华
Owner 武钢集团有限公司
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