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Molten iron smelting additive and preparation method thereof

A technology for smelting additives and molten iron, applied in the field of molten iron smelting additives and their preparation, can solve the problems of difficult to control the chemical composition of molten iron, poor smelting sufficiency, slow molten iron smelting speed, etc., and achieves easy control of the process and improves the molten iron smelting speed. , The effect of molten iron smelting is sufficient

Inactive Publication Date: 2021-01-05
南京辉腾机械铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the melting speed of molten iron is slow, the adequacy of melting is not good, and the chemical composition of molten iron is difficult to control, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A molten iron smelting additive, the molten iron smelting additive contains nano silicon dioxide, the particle size distribution of the nano silicon dioxide powder is 30-100 nanometers, and the molten iron smelting additive also contains silicon carbide powder and aluminum oxide powder, wherein The silicon carbide powder has a particle size of at least 20% by mass and is less than or equal to 80 nanometers, and the aluminum oxide powder has a particle size of at least 15% by mass and is less than or equal to 80 nanometers; the nano-silicon dioxide and silicon carbide powder , The mass ratio of aluminum oxide powder is 5:0.12:0.03.

[0018] The preparation method of molten iron smelting additive, the steps are as follows:

[0019] (1) Configure a methanol aqueous solution with a mass fraction of 1.5%, add nano-silica to the methanol aqueous solution, the amount of the methanol aqueous solution should be able to fully integrate the nano-silica, stir to make the nano-silic...

Embodiment 2

[0023] An additive for molten iron smelting. The additive for molten iron smelting contains nano-silicon dioxide. The particles of the nano-silicon dioxide powder have a hollow structure, and the volume ratio of the pores is more than 15%. The particle size of the nano-silicon dioxide powder is distributed between 30-100 Nano, molten iron smelting additives also include silicon carbide powder and aluminum oxide powder, wherein the silicon carbide powder has at least 20% by mass and the particle size is less than or equal to 80 nanometers, and the aluminum oxide powder has at least 15% by mass The above particle size is less than or equal to 80 nanometers; the mass ratio of the nano silicon dioxide, silicon carbide powder and aluminum oxide powder is 5:0.12:0.03.

[0024] The preparation method of molten iron smelting additive, the steps are as follows:

[0025] (1) Configure a methanol aqueous solution with a mass fraction of 1.5%, add nano-silica to the methanol aqueous solut...

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Abstract

The invention provides a molten iron smelting additive and a preparation method thereof, and relates to the technical field of molten iron smelting. The molten iron smelting additive comprises nano-silica, silicon carbide powder and aluminum sesquioxide powder, wherein the particle size distribution of nano-silica powder is 30-100 nanometers; the particle size of at least 20 percent by mass or more of the silicon carbide powder is smaller than or equal to 80 nanometers; the particle size of at least 15 percent by mass or more of the aluminum sesquioxide powder is smaller than or equal to 80 nanometers; and the mass ratio of the nano-silica to the silicon carbide powder to the aluminum sesquioxide powder is 5 to 0.12 to 0.03. According to the molten iron smelting additive and the preparation method thereof provided by the invention, the additive is directly added into a smelting furnace for use, is gradually fused with molten iron into a whole in the smelting process, and is simple in practical method, the technological process is easy to control, the molten iron smelting speed can be effectively increased, and molten iron smelting is more sufficient.

Description

technical field [0001] The invention relates to the technical field of molten iron smelting, in particular to an additive for molten iron smelting and a preparation method thereof. Background technique [0002] The reason why cast iron is different from steel is because of the existence of graphite, and the control of graphite form is one of the keys to the control of cast iron smelting process; at the same time, it is necessary to ensure that the composition requirements of various matrix structures are obtained during the smelting process, that is, the chemical composition The control of the fluctuation range of the machine also needs to ensure that good processing performance is obtained under the premise of satisfying the mechanical properties. [0003] At present, the commonly used method for molten iron smelting is: the condensed blast furnace pig iron ingot is matched with an appropriate amount of scrap steel, melted into molten iron in a cupola furnace, and then po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C1/08
CPCC21C1/08C21C7/0037Y02P10/143
Inventor 陈叶辉夏强国张小春火高红头张锁头
Owner 南京辉腾机械铸造有限公司
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