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Test method and device for simulating the circulating enrichment discipline of alkali metal in blast furnace

An alkali metal and alkali metal carbonate technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as inability to perform at will, lack of reliability, etc., and achieve high experimental reliability, simple methods, and high simulation reliability. Effect

Active Publication Date: 2010-10-27
SHOUGANG CORPORATION
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Problems solved by technology

At present, the research methods for the cyclic enrichment of alkali metals in the blast furnace are mainly through the methods of blast furnace anatomy and thermodynamic calculations. Of these two methods, although the former is reliable, it cannot be carried out at will; although the latter is simple in calculation, it lacks reliability.

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  • Test method and device for simulating the circulating enrichment discipline of alkali metal in blast furnace

Examples

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Embodiment Construction

[0018] Embodiment: determine alkali metal amount according to alkali metal load calculation and enrichment degree, this example is the K of 2g 2 CO 3 and 1g of Na 2 CO 3 . According to the needs of the test, add pellets: sintered ore = 3:7, a total of 1000g, add it to the stainless steel crucible, separate the different temperature zones with a mesh screen, and cover the crucible with a threaded buckle after installation .

[0019] Raise the temperature at a heating rate of 8°C / min, pass gas after the temperature reaches 500°C, and keep the reaction for 3 hours. After the reaction is over, start to turn off the power supply of the heating furnace, and with the cooling of the furnace, the temperature of each section is lowered to below 500°C, and the gas flow is stopped. When the temperature of the crucible drops to room temperature, take out the crucible, open the crucible cover and take out the charge.

[0020] Samples were sent for chemical composition and XRD physical...

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Abstract

The invention relates to a test method and a device for simulating the circulating enrichment discipline of alkali metal in a blast furnace, belonging to the technical field of blast furnace ironmaking. The device is designed to be a three-stage heating furnace with an alkali metal vapor generator and reducing gas protecting atmosphere. The method comprises the following steps: placing alkali metal source into the alkali metal vapor generator, feeding burden materials, separating the burden materials in different temperature zones by mesh sieves, heating after sealing is started, introducing gas when temperature reaching 300-500 DEGC and ensuring the reducing atmosphere; using alkali metal vapor generated by decomposing the alkali metal carbonate to carry out the simulation experiment after reaching the set temperature, the reaction time being 2-6h, lowering the temperature and stopping introducing gas after finishing the reaction, cooling to the room temperature, taking out the burden materials in different sections to analyze chemical compositions and XRD, and obtaining the enrichment amount and occurrence forms of the alkali metal in different temperature zones. The invention is simple and reliable to simulate the circulating enrichment discipline of the alkali metal in different temperature zones in the blast furnace.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular provides a test method and a device for simulating the circulation and enrichment law of alkali metals in a blast furnace. Background technique [0002] A certain amount of alkali metal compounds will be carried in the charge. In the middle and upper parts of the blast furnace, the alkali metals entering the blast furnace in the form of complex silicate are very stable. When they enter the high temperature zone, they will undergo a reduction reaction and be reduced As alkali metal vapor, the blast furnace gas carrying alkali metal vapor, alkali metal cyanide and alkali metal carbonate will be deposited on the lining and charge during the bottom-up movement of the blast furnace gas, while The alkali metal that has no time to react and deposit is discharged from the top of the furnace with the gas and dust, and most of the unreduced alkali metal silicate is discha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 张勇马泽军张雪松张殿伟
Owner SHOUGANG CORPORATION
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