Isostatic pressing heat preservation furnace and isostatic pressing heat preservation method for horizontal continuous cast nodular cast iron sectional material

A ductile iron and horizontal continuous casting technology, applied in the field of static pressure holding furnace, can solve problems such as equipment failure and complicated operation, and achieve the effects of improving production efficiency, stable liquid level, and improving quality and quantity

Active Publication Date: 2019-07-26
HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this cooling device has the following disadvantages: the device continuously replenishes the molten iron through the heat preservation bag and the hydraulic rotary mechanism. Due to the frequent use of institutions, the equipment is prone to failure

Method used

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  • Isostatic pressing heat preservation furnace and isostatic pressing heat preservation method for horizontal continuous cast nodular cast iron sectional material
  • Isostatic pressing heat preservation furnace and isostatic pressing heat preservation method for horizontal continuous cast nodular cast iron sectional material
  • Isostatic pressing heat preservation furnace and isostatic pressing heat preservation method for horizontal continuous cast nodular cast iron sectional material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1 As shown, the isostatic holding furnace for horizontal continuous casting of ductile iron profiles includes a furnace body, the furnace body is composed of an upper furnace body 2 and a lower furnace body 3; the upper furnace body 2 is hinged with a furnace cover 1 , The side wall of the upper furnace body 2 is provided with an upper sprue 6, and the volume of the upper furnace body 2 is 1.2 times the amount of molten iron added each time.

[0037]A lower sprue 7 is arranged on the side wall of the lower furnace body 3 on the same side as the upper sprue 6 , and the gate area of ​​the lower sprue 7 is smaller than that of the upper sprue 6 . A crystallizer interface 4 and a crystallizer 5 installed on the crystallizer interface 4 are provided at the middle and lower part of the side wall of the lower furnace body 3 opposite to the lower sprue 7 .

[0038] The upper furnace body 2 and the lower furnace body 3 communicate through a bottom hole 8, one en...

Embodiment 2

[0042] The preparation method for producing large-section nodular cast iron using a holding furnace is realized through the following steps:

[0043] (1) Ingredients, analyze the chemical composition of cast iron Q10, scrap steel, scrap bar / iron filings, 95% recarburizer, ferromanganese, and ferrosilicon, and then weigh the above raw materials according to the following mass percentage: C: 3.6-3.7% , Si: 1.1-1.3%, Mn: 0.25-0.35%, S<0.05%, P<0.07%, the rest is Fe;

[0044] (2) Smelting. Put the weighed cast pig iron, scrap steel, scrap bar / iron filings, 95% recarburizer, ferromanganese, and ferrosilicon into an intermediate frequency induction furnace for melting. After the raw material melting temperature reaches 1520-1550°C, the molten iron The frequency induction furnace is transferred to another holding furnace, mixed evenly with the existing molten iron, cooled to 1430-1450°C and released;

[0045] (3) Hot metal spheroidization treatment, slag removal, nodulizer and inocu...

Embodiment 3-8

[0054] According to the production technique in the embodiment 2, the holding furnace is used to prepare large-section ductile iron profiles, and each element composition is shown in the following table:

[0055] Table 1

[0056]

[0057]

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PUM

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Abstract

The invention relates to an isostatic pressing heat preservation furnace and an isostatic pressing heat preservation method for horizontal continuous cast nodular cast iron sectional material. The heat preservation furnace comprises a furnace body composed of an upper furnace body and a lower furnace body, and a main pouring port, specifically, an upper pouring port of the heat preservation furnace is arranged on the side wall of the upper furnace body. An auxiliary pouring port, specifically, a lower pouring port is arranged on the side wall of the lower furnace body, and the lower pouring port has the functions of observing the height of the liquid level, measuring the temperature and applying the stable temperature of fire spraying equipment. The upper furnace body and the lower furnacebody are in communication through a bottom hole at the bottom of the upper furnace body. When the heat preservation furnace is used, a first ladle molten iron is poured into the lower furnace body from the lower pouring port, then the subsequent molten iron is poured from the upper pouring port to enter the upper furnace body every other than 10 minutes, and the molten iron continuously enters the lower furnace body through the bottom hole, and is pulled out from the outlet of a crystallizer. The high-quality nodular cast iron sectional material can be obtained by using the heat preservationfurnace without easily generating defects such as scabbling, furring, bulging, out-of-rounding and the like.

Description

technical field [0001] The invention relates to the technical field of horizontal continuous casting holding furnaces, in particular to an isostatic holding furnace and method for horizontal continuous casting ductile iron profiles. Background technique [0002] The holding furnace for horizontal continuous casting is one of the key equipment in continuous casting equipment. During the production of ductile iron profiles, the liquid level and pressure changes of the liquid iron formed in the holding furnace directly affect the solidification of the molten iron in the crystallizer. There is a direct relationship between forming and expansion after export. Solidified from a liquid state into a red-hot bar with a solid hard shell. According to the different cross-sections, after the profile is exported, the liquid core at the core will still stay for a period of time before it can completely condense into a solid state. After the exit, the crystallized shell thickness is Uneve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/10C22C37/10C22C37/04C22C33/08B22D11/045
CPCB22D11/045B22D11/10C22C33/08C22C37/04C22C37/10
Inventor 魏志勇王敬民孔令伟
Owner HANDAN HENGGONG METALLURGICAL MACHINERY CO LTD
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