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A test method for testing the cooling strength of blast furnace slag

A technology of cooling strength and testing method, which is applied in the direction of strength characteristics, measuring devices, instruments, etc., to achieve the effect of saving material and financial resources, simple operation, and reducing the number of pilot tests

Active Publication Date: 2018-04-24
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But regardless of the method, there is no relevant research on the cooling intensity required for the vitrification of blast furnace slag, so it is necessary to determine the cooling intensity required for the vitrification of liquid blast furnace slag to guide the efficient recovery of sensible heat of blast furnace slag and its resources utilization

Method used

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  • A test method for testing the cooling strength of blast furnace slag
  • A test method for testing the cooling strength of blast furnace slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Blast furnace slag is natural cooling slag, and its main components are CaO: 44.24%, SiO 2 : 40.24%, Al 2 O 3 : 6.95%, MgO: 6.17%, TFe: 0.59%.

[0032] Heat 18.7g of blast furnace slag to 1600℃, firstly open the regulating valve 7 to make the cooling water enter the upper water cooling box 1 and the lower water cooling box 10 from the water inlet main pipe 8 through the flow meter 6 and the lower water cooling box 10 respectively, and then melt it with a crucible The slag is poured into the blast furnace slag tank 3, and the upper water-cooled box 1 is quickly covered on the lower water-cooled box 10. The cooling water in the upper water-cooled box 1 and the lower water-cooled box 10 is exchanged with the high-temperature liquid blast furnace slag in the blast furnace slag tank 3 The heat is discharged from the outlet pipe 4 after the heat exchanged cooling water is heated up. At the same time, the gap between the upper water-cooled box 1 and the lower water-coo...

Embodiment 3

[0034] Example 3: Blast furnace slag is water quenched slag, and its main components are CaO: 41.64%, SiO 2 : 34.49%, Al 2 O 3 : 11.93%, MgO: 7.56%, TFe: 0.32%.

[0035] Heat 21.2g of blast furnace slag to 1600°C, firstly open the regulating valve 7 so that the cooling water enters the upper water-cooled box 1 and the lower water-cooled box 10 from the water inlet pipe 8 through the flow meter 6 and the water inlet pipe 5 respectively, and then melts with a crucible The slag is poured into the blast furnace slag tank 3, and the upper water-cooled box 1 is quickly covered on the lower water-cooled box 10. The cooling water in the upper water-cooled box 1 and the lower water-cooled box 10 is exchanged with the high-temperature liquid blast furnace slag in the blast furnace slag tank 3 The heat is discharged from the outlet pipe 4 after the heat exchanged cooling water is heated up. At the same time, the gap between the upper water-cooled box 1 and the lower water-cooled box 10 is f...

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Abstract

The invention discloses a device and a test method for testing the cooling strength of blast furnace slag. Its process system mainly adopts a heat exchange system and a data acquisition system. The water main pipe enters the upper water cooling box and the lower water cooling box respectively through the flow meter and the water inlet pipe. Covered on the lower water cooling box until it is fully coupled, the high-temperature slag in the blast furnace slag tank exchanges heat with the cooling water in the upper and lower water cooling boxes. When the molten blast furnace slag drops to 80°C to 120°C, the test stops. At the same time, the temperature drop of molten blast furnace slag ΔT slag, heat exchange time τ and vitrification rate ε were recorded. The invention can quickly test the cooling intensity required for the vitrification of blast furnace slag, provide data support for the recovery and utilization of waste heat of blast furnace slag, and effectively guide the recovery and reuse of waste heat of blast furnace slag.

Description

Technical field [0001] The invention belongs to the field of secondary energy recovery and utilization in the iron and steel metallurgical process, and specifically relates to a device and a testing method for testing the cooling strength of blast furnace slag required for vitrification of blast furnace slag. Background technique [0002] Blast furnace slag is a by-product discharged from the blast furnace during pig iron smelting. With the growth of my country's steel demand and the development of the iron and steel industry, the discharge of blast furnace slag is increasing. Liquid blast furnace slag contains high thermal energy. The heat per ton of blast furnace slag is about 64kg standard coal, which is a high-grade waste heat resource and has a high recycling value. At the same time, blast furnace slag is also a silicate material with good performance, which can be used as a raw material for the production of building materials, fertilizers and cement. The current utilizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/60C21B3/08
Inventor 李卫东刘常鹏马光宇谢国威张宇张天赋王东山贾振徐大勇
Owner ANGANG STEEL CO LTD