Long-life steelmaking tundish dry material processing and using process

A processing technology and long-life technology, applied in the field of refractory materials, can solve the problems of the life-limiting link of slag corrosion resistance, the increase of the temperature of the tundish shell, and the thinning of the dry material of the working layer, so as to improve the service life and improve the Sintering resistance, the effect of solving safety hazards

Pending Publication Date: 2021-08-10
本溪市众信冶金炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry material working lining at the tundish slag line is eroded by the tundish covering agent and steel slag, and its slag erosion resistance becomes the limiting link of the tundish service life
[0004] However, the use time of the existing tundish dry material used for steelmaking generally does not exceed 50 hours. If th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] Steelmaking intermediate package processing process includes the following steps:

[0026] Step 1: Determine the formulation, laboratory test, proved to be tried to have good anti-erosion and anti-brush resistance due to silicon carbide, and the slag line dry material can increase its service life, and dry material is added to the blanket. Graphite can improve anti-sinteringness, thereby increasing service life.

[0027] Step 2: The raw material selection, the dry material uses high-grade electrical melt magnesium sand, silicon carbide, and places the appropriate amount of electric melt magnesium sand, silicon carbide and its excipients to stir, mix, knead, to obtain a slag Format, put the appropriate amount of electric melt magnesium sand, silicon carbide, and scaly graphic ink, stir it into the mixer, knead, to obtain a hair dry material;

[0028] Step 3: Safe production, indicate the production date and after the batch;

Example Embodiment

[0029] Example 2:

[0030] Steelmaking intermediate braking material use process includes the following steps:

[0031] S1: On-site arrangement technicians track construction, slag wires and pack walls use different dry materials, targeted to increase the anti-aggravation of the slag dry material and the anti-flavor of the hair dry material;

[0032] S2: Technical personnel track the pouring process, measure the temperature of the intermediate package shell at any time, and the dry material is shed during use;

[0033] S3: The intermediate package is used after the next line, the measured slag is measured and the sintering thickness of the wrap wall, tracking the package, observing the difficulty of turning bag;

[0034] S4: Summarize the test data and complete the test.

Example Embodiment

[0035] Example I. Embodiments of the preparation of the intermediate material can be added with an appropriate amount of flakes and sink iron red, preparing the raw material magnesium sand of the intermediate material is ultrafine powder, and the superfine powder is less than 2 μm, and the raw material electrical melt magnesium sand and silicon carbide. The weight ratio is 4: 6. The order in which the original material is added in the production step needs to be strictly followed. The agitation step is divided into premixed and further mixing, and the premix is ​​placed in the stirrer in the mixer to obtain a premixed material, premixed time Controlled in 20-25 minutes, further mixing is to place the sintering agent and the excipient and the premixed material in the mixer, the time is controlled to 15-20 minutes, and the mixing temperature is controlled at normal temperature.

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PUM

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Abstract

The invention discloses a long-life steelmaking tundish dry material processing and using process, which comprises a steelmaking tundish dry material processing process and a steelmaking tundish dry material using process, and the steelmaking tundish dry material processing process comprises formula determination, raw material selection, safe production, and delivery after production dates and batches are marked. The steelmaking tundish dry material using process comprises the steps that technicians are arranged on site to track construction; the technicians track the steel casting process and measure the temperature of the tundish shell at any time; the erosion thickness of a slag line and the sintering thickness of a tundish wall are measured after the tundish is used off line, the tundish is tracked and turned, and the difficulty of turning the tundish is observed; and test data is summarized. According to the dry material, the service time of the tundish can be greatly prolonged and can reach 50 hours or more, the erosion of an impact area and a slag line position is relatively shallow and is about 1/3 of the construction thickness, the tundish wall is basically not eroded, the temperature of a tundish shell is lower than 280 DEG C, the potential safety hazard of the tundish is solved, meanwhile, the cost of refractory materials per ton of steel is reduced, and the tundish runs safely.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a long-life steelmaking tundish dry material processing and its application process. Background technique [0002] Steelmaking refers to controlling the carbon content (generally less than 2%), eliminating harmful elements such as P, S, O, and N, retaining or increasing beneficial elements such as Si, Mn, Ni, and Cr, and adjusting the ratio of elements to obtain the best Performance, put the pig iron for steelmaking into the steelmaking furnace and smelt it according to a certain process to obtain steel. Steel products include steel ingots, continuous casting slabs and direct casting into various steel castings. Generally speaking, steel generally refers to steel rolled into various steel products. Steel belongs to ferrous metal but steel is not exactly equal to ferrous metal. [0003] The tundish is located between the ladle and the mold, and is used to receive molten stee...

Claims

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Application Information

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IPC IPC(8): C04B35/04
CPCC04B35/04C04B2235/3826C04B2235/9607
Inventor 余澍
Owner 本溪市众信冶金炉料有限公司
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