Method for testing stability of steel slag particles

A testing method and stability technology, which is applied in the direction of testing metals, measuring devices, instruments, etc., can solve the problems of difficulty in grinding and the inability to compare the stability of steel slag, and achieve the effect of easy operation

Inactive Publication Date: 2005-12-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of steel slag can be roughly judged qualitatively by using the test cake method, but it is impossible to compare the stability of various steel slags, and when the iron content of steel slag is high, it is difficult to grind finely

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Sieve out the steel slag particle drying that particle diameter is 5mm-10mm; Get M 0 = 400g, weigh 400g of dried steel slag particles, put them in a cooking box, heat to boil, and then boil continuously for 6 hours. When cooking, the water surface should not cover the steel slag. , take out the steel slag and dry it. At this time, cracks will appear on the surface of the steel slag block, and fine powder will fall off. The dried steel slag particles will be placed in a screen whose aperture is 1.5mm. Net, after sifting out the fine powder, weigh the mass M of the remaining steel slag 1 =382g, use the mass M of the remaining steel slag 1 Divided by the total steel slag mass M 0 , Calculate the stability rate (R) of steel slag to be 95.5%.

Embodiment 2

[0016] Embodiment 2: Sieve out the steel slag particle drying that particle diameter is 4.75mm-9.5mm; Take M 0 = 400g, take 400g of dried steel slag particles and place them in a stainless steel wire mesh container. Pass through the steel slag, heat to boiling and then boil continuously for 4 hours, cool for 18 hours and then heat to boil and continue boiling for 4 hours, after 3 cycles, release the water, take out the stainless steel wire mesh container and dry it together with the steel slag, then Cracks will be produced on the surface of steel slag granules, and fine powder will fall off. Shake the stainless steel wire mesh container, sieve out the fine powder, and weigh the quality of the remaining steel slag as M 1 =385g, use the mass M of the remaining steel slag 1 Divided by the total steel slag mass M 0 , Calculate the stability rate (R) of steel slag to be 96.25%.

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Abstract

The steel slag particle stability measuring process includes the following steps: sieving steel slag particle of certain granularity, stoving, weighing the weight M0, steaming, stoving, sieving out fine powder with granularity smaller than certain size, weighing the residual steel slag M1, and dividing M1 by M0 to obtain the steel slag particle stability R in the said granularity range. The present invention has simple operation, and can analyze steel slag quantitatively for grading steel slag and reasonable utilization.

Description

technical field [0001] The invention belongs to the technical field of utilization of metallurgical waste slag, and in particular relates to a method for testing the stability of steel slag. Background technique [0002] A certain amount of steel slag will be produced in the whole process of steelmaking production. Due to the type of smelting steel, the smelting method, the stage of slag formation and the different post-processing methods of slag, the composition and properties of slag are obviously different. Usually because the steel slag contains more overburned free CaO and MgO, and a certain amount of metallic iron, in the presence of water, although after a long time, there will still be considerable volume expansion due to chemical reactions and Cracking is the so-called poor stability, so the utilization of steel slag is greatly restricted. my country's annual steel output has exceeded 200 million tons, that is, more than 30 million tons of steel slag is discharged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/20
Inventor 陈志山刘选举廖欣
Owner TONGJI UNIV
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