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Low-silicon inoculant and preparation method thereof

An inoculant and ferrosilicon technology, which is applied in the field of cast iron, can solve problems such as the inability to realize the reuse of recycled materials and iron filings, the inability to use a large amount of recycled materials and iron filings, and the inability to reduce costs, so as to ensure the inoculation effect and reduce silicon Content, the effect of increasing the amount of use

Inactive Publication Date: 2021-03-05
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Therefore, in the case of high silicon content in molten iron, it is impossible to use a large amount of returned charge and iron filings, and it is impossible to realize the reuse of returned charge and iron filings, and it is also impossible to reduce the cost

Method used

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  • Low-silicon inoculant and preparation method thereof
  • Low-silicon inoculant and preparation method thereof
  • Low-silicon inoculant and preparation method thereof

Examples

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preparation example Construction

[0025] The application also provides the preparation method of the low-silicon inoculant, comprising the following steps:

[0026] Melting pig iron and ferrosilicon to obtain a melt, adding one or more of calcium, aluminum, barium, strontium and zirconium to the melt for smelting, cooling and solidifying, and breaking to obtain a low-silicon inoculant.

[0027] The invention controls the silicon content of the inoculant at 30-60% and introduces other trace metal elements to be used as the inoculant for the inoculation treatment of molten iron. The inoculation effect is equivalent to that of the traditional inoculant. Appropriate increase means that a large amount of recycled materials and iron filings can be used. Compared with traditional inoculants, the inoculant of the present invention has the characteristics of low silicon, low melting point and easier melting, and is more suitable for the situation where the original molten iron has higher silicon and lower molten iron t...

Embodiment 1

[0032] Produce a kind of inoculant composition as above-mentioned method and be: Si 58.59wt%, Ba 1.15wt%, Ca 1.24wt%, Al 1.11wt%, surplus Fe; Particle size 0.2~0.8mm, try out in certain factory, inoculation effect is good ( Such as Figure 1 ~ Figure 4 shown), and the usage of returned material and iron filings increased by 15% in the production process.

[0033] figure 1 The inoculant prepared for this example is at the inoculation amount of 0.2%, 1429°C, the liquid level state and the corresponding graphite morphology after 19s after inoculation; figure 2 It is the liquid surface state and the corresponding graphite morphology of the traditional inoculant at the inoculation amount of 0.2%, 1419°C, 21s after inoculation; image 3 The inoculant prepared for this example is at the inoculation amount of 0.4%, 1418°C, the liquid level state and the corresponding graphite morphology after 22 seconds after inoculation; Figure 4 It is the state of the liquid level of the tradit...

Embodiment 2

[0035] Produce a kind of inoculant composition in the above-mentioned way and be: Si 42.62wt%, Sr 1.24wt%, Ca 1.15wt%, Al 1.07wt%, surplus Fe; Particle size 0.2~0.8mm, try out in certain factory, effect is good (as Table 1), and in the production process, the amount of recycled materials and iron filings increased by 20%.

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Abstract

The invention provides a low-silicon inoculant. The low-silicon inoculant comprises the following raw materials of pig iron, silicon iron and metal, wherein the silicon content of the pig iron and thesilicon iron is 30wt%-60wt%, the metal is selected from one or more of calcium, aluminum, barium, strontium and zirconium, the content of the metal is 0.2wt%-12wt%, and the balance is iron. Accordingto the low-silicon inoculant, the silicon content of the inoculant is controlled to be 30wt%-60wt%, and other trace metal elements are introduced to serve as the inoculant for molten iron inoculationtreatment, so that the inoculation effect is equivalent to that of a traditional inoculant, silicon in base molten iron can be properly improved due to the fact that silicon is low, and it means thata large amount of foundry returns and scrap iron can be used.

Description

technical field [0001] The invention relates to the technical field of casting cast iron, in particular to a low-silicon inoculant and a preparation method thereof. Background technique [0002] At present, the competition in the world economy is becoming increasingly fierce, and the pressure on cost reduction of foundries is increasing. On the one hand, the prices of high-quality pig iron and scrap steel in casting raw materials are rising day by day, and the use of inferior raw materials in order to reduce costs does not pay off. The composition of charge and iron filings has reached the requirements of castings, and the silicon content in the inoculant is about 70%, which may easily cause silicon to exceed the standard after inoculation. In order to ensure that the composition is qualified, the amount of returned charge and iron filings is limited, and the cost is not easy to reduce. [0003] Therefore, in the case of high silicon content in molten iron, it is impossible ...

Claims

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Application Information

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IPC IPC(8): B22D1/00C21C1/08C21C7/00C22C28/00C22C33/08C22C38/02C22C38/06
CPCB22D1/00C21C7/0006C22C28/00C22C38/02C22C38/002C22C38/06C22C33/08C21C1/08Y02P10/20
Inventor 郭进京邹悟会刘永锋
Owner ZYNP GRP
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