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A Melting Method for the Production of Large Castings

A technology for large-scale castings and ladles, applied in the direction of casting melt containers, furnace types, casting equipment, etc., can solve problems such as technical inability to complete, improve economic and social benefits, scientific and reasonable process methods, and reduce production costs. Effect

Active Publication Date: 2021-06-11
齐齐哈尔重型铸造有限责任公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there are only two 20-ton medium-frequency induction furnaces, one 75-ton overhead crane and one 30-ton overhead crane in our unit’s existing equipment. In this state of equipment, we want to produce 80-ton castings. Existing technology cannot complete

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  • A Melting Method for the Production of Large Castings
  • A Melting Method for the Production of Large Castings

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Below we take the production of 80 tons of castings as an example to describe its specific implementation process. We use two 30-ton ladles and three 20-ton ladles and two 20-ton medium-frequency induction furnaces to complete the process.

[0018] (1) Build ladles for storing molten iron:

[0019] Ladle is casting and pouring equipment, which is used for pouring operations in foundry workshops. It receives molten iron in front of the furnace, and then transports it to the mold for pouring. Since the molten iron has a large impact on the bottom of the ladle when it is poured into the ladle, the first step is to lay a layer of mica board (1000°C), a high-temperature-resistant material, in the ladle. The mica board has excellent high-temperature resistance and insulation properties. Excellent electrical insulation performance and excelle...

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Abstract

The invention discloses a smelting method for producing large-scale castings, which belongs to the technical field of casting. Taking the 80-ton casting as an example, we use two 30-ton ladles, three 20-ton ladles and two 20-ton medium-frequency induction furnaces to complete the process. It includes the following steps: (1) Build a ladle for storing molten iron; (2) Control the holding time after tapping, control the temperature of the molten iron above 1200°C, and control the chemical composition at point C of the iron-carbon alloy phase diagram at about 4.3 to ensure that the molten iron Without solidification, the bag is guided, inoculated in a timely manner, and the pouring is completed. The production of large-tonnage castings is realized with simple equipment, the production cost is reduced, the process method is scientific and reasonable, and the reliability is high, which improves the economic and social benefits of the enterprise.

Description

technical field [0001] The invention relates to a smelting method for producing large-scale castings, belonging to the technical field of casting production. Background technique [0002] Smelting is a pyrometallurgical process in which metal materials and other auxiliary materials are put into a heating furnace to be melted and prepared, and the material undergoes certain physical and chemical changes in the high-temperature furnace to produce crude metal or metal enrichment and slag. The basic purpose of smelting is to produce an alloy with a chemical composition that meets the requirements and a high purity of the melt, so as to create favorable conditions for casting ingots of various shapes. The medium frequency induction furnace is mainly used for smelting steel, iron, copper, aluminum and alloys, etc. It has the characteristics of high melting efficiency, good power saving effect, uniform metal composition, less burning loss, fast temperature rise, and easy temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52B22D41/02
CPCB22D41/02C21C5/5241C21C5/5252
Inventor 李志博赵志成李丹徐小光周桂梅袁洪志赵红霞
Owner 齐齐哈尔重型铸造有限责任公司
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