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Voltage-transformation type softening dripping performance testing method and equipment

A test method and test equipment technology, applied in the direction of measuring device, flow characteristics, investigation stage/state change, etc., can solve the problems that the actual situation inside the blast furnace cannot be objectively displayed, the production situation of the blast furnace does not match, etc., and achieve accurate program control and data collection , the effect of improving accuracy and reliability

Active Publication Date: 2019-07-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above experimental devices, the load and pressure applied to the charge are all fixed values, and the load of the reflow zone in the actual blast furnace smelting state will change continuously with the material level and furnace top pressure, which is inconsistent with the actual production situation of the blast furnace. Therefore, it is impossible to objectively display the actual situation inside the blast furnace

Method used

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  • Voltage-transformation type softening dripping performance testing method and equipment
  • Voltage-transformation type softening dripping performance testing method and equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Embodiment 1: a kind of variable pressure type reflow dripping performance test method, comprises the following steps:

[0059] S100: sample preparation: take the experimental samples iron-containing charge and coke required for the experiment respectively, and place the iron-containing charge and the coke in a drying oven to dry;

[0060] As an improvement, the particle size of the iron-containing charge and coke weighed in the S100 is 10-12.5mm, the mass of the iron charge and the coke are 500g respectively, and the drying temperature of the drying oven is 100±10°C. The mass of coke is 500g, and the error is ±1 grain.

[0061] S200: sample loading: add dried coke to the pre-prepared graphite crucible, and apply pressure evenly, the coke layer is the lower coke layer, test the thickness of the lower coke layer; Add the dried iron-containing charge, and apply pressure evenly to test the thickness of the iron-containing charge; then add some coke to the surface of the i...

Embodiment 2

[0076] Embodiment 2: as figure 1 As shown, a pressure-variable reflow dripping performance testing equipment, the pressure-variable reflow dripping performance testing equipment includes a support frame 20, a pressurizing device 9, a melting furnace body 14, a collecting device 22, a gas supply system 21 and control system 19;

[0077] Support frame 20: the section of the support frame 20 is an L-shaped structure;

[0078] Droplet furnace body 14: the droplet furnace body 14 is arranged on one side of the support frame 20;

[0079]The top of the droplet furnace body 14 is provided with an exhaust hood 10, and at the top of the droplet furnace body 14 and inside the exhaust hood 10, a heat insulating collar 11 is arranged. The 14 furnace chambers of the drop furnace body are coaxially arranged;

[0080] Specifically, the diameter of the furnace body 14 of the droplet furnace is 100 mm.

[0081] The furnace body 14 of the droplet furnace is provided with a graphite branch pi...

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Abstract

The invention discloses a voltage-transformation type softening dripping performance testing method and equipment. The voltage-transformation type softening dripping performance testing method comprises the following steps of test specimen preparation, sample loading, program temperature rise control, gas ingredient control, pressure control and data collection. The voltage-transformation type softening dripping performance testing equipment comprises a pressurization device, a molten drop furnace body, a control system, a supporting frame, a gas supply system and a collection device, whereinone side of the supporting frame is provided with the molten drop furnace body; the bottom end of the molten drop furnace body is provided with the collection device connected with the bottom of the supporting frame; and the control system and the gas supply system are connected through a pipeline. By use of the equipment, load pressure applied to furnace charges can be changed, and in an experiment process, the load pressure applied to the furnace charges gradually changes along with the rise of the temperature. Blast furnace charge softening dripping performance parameters obtained by the method and the equipment can more objectively reflect the internal practical situation of the blast furnace.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a pressure-variable reflow dripping performance testing method and equipment. Background technique [0002] Since the blast furnace charge (including sinter, pellet ore and lump ore) is not a crystal of pure material, they do not have a uniform melting point, but have a certain range of soft melting range. During the falling process of the blast furnace charge, as the temperature rises, the charge will first expand due to heat, and then begin to soften. After softening, the charge will start to melt as the temperature further rises and is reduced. Before the slag and metal gather into droplets, the air permeability of the reflow zone will gradually become poor, blocking the flow of reducing gas, so a large pressure difference will appear. After the slag and metal gather into droplets, the liquid drips from the reflow zone into the furnace hearth. In this process, the dr...

Claims

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Application Information

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IPC IPC(8): G01N11/00G01N25/04
CPCG01N11/00G01N25/04
Inventor 白晨光宋家齐游志雄周凯刘勇杰吕学伟邱贵宝张生富扈玫珑徐健余文轴邓青宇
Owner CHONGQING UNIV
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