A kind of preparation method of silicon-strontium alloy modifier

A modifier and alloy technology, applied in the field of alloy metal materials, can solve the problems of high cost and difficult process, and achieve the effects of reducing production cost, reducing process difficulty and promoting inoculation.

Active Publication Date: 2022-06-28
SANXIANG ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned method is the current mainstream technology for the production of silicon-strontium. Using the above-mentioned process to obtain a low-alumina and low-calcium silicon-strontium alloy has problems such as high cost and difficult process.

Method used

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  • A kind of preparation method of silicon-strontium alloy modifier
  • A kind of preparation method of silicon-strontium alloy modifier
  • A kind of preparation method of silicon-strontium alloy modifier

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preparation example Construction

[0021] The preparation method of the silicon-strontium alloy modifier provided by the present invention comprises the following steps:

[0022] (1) Dry the monocrystalline silicon cutting material or polycrystalline silicon cutting material until the moisture content is below 1%;

[0023] (2) Mix 80-100 parts by weight of the dried monocrystalline silicon cutting material or polycrystalline silicon cutting material with 20-30 parts by weight of scrap steel, and conduct electric heating smelting at 1300-1450 ℃ to obtain alloy liquid;

[0024] (3) adding the obtained alloy liquid to 1-4 parts by weight of metal strontium, to carry out a strontium alloying reaction, and then casting and molding to obtain a silicon-strontium alloy modifier. As can be seen from the above description, the beneficial effects of the present invention are:

[0025] The present invention adopts the electric heating smelting technology through the design of the above-mentioned preparation process. The s...

Embodiment 1

[0035] The preparation method of the silicon-strontium alloy modifier of the present embodiment comprises the following steps:

[0036] The high-purity water-containing silicon fume scraps produced in the slicing process of solar-grade mono / polycrystalline silicon plates are used as raw materials, and the extruded granulation is carried out in the extruder to obtain the granulated material, and the obtained granulated material is put into the rotary drying kiln , dry at 80℃ until moisture ≤1.0%, 3-12mm material in the granulation material accounts for more than 90%, put the weighed metal strontium on the bottom of the secondary heating furnace to avoid the pouring point and cover it with a covering agent it is good. The above raw material formula is 80 parts by weight of dried mono / polycrystalline silicon wafer cutting powder granules, 20 parts by weight of clean scrap steel, and 1 part by weight of metal strontium, and the temperature of the melting furnace is controlled with...

Embodiment 2

[0039] The preparation method of the silicon-strontium alloy modifier of the present embodiment comprises the following steps:

[0040]The high-purity water-containing silicon fume scraps produced in the slicing process of solar-grade mono / polycrystalline silicon plates are used as raw materials, and the extruded granulation is carried out in the extruder to obtain the granulated material, and the obtained granulated material is put into the rotary drying kiln , dried at 150 °C until moisture ≤ 1.0%, 3-12mm material accounted for more than 90% of the granulated material, put the weighed metal strontium on the bottom of the secondary heating furnace to avoid the pouring point and cover it with a covering agent it is good. The above raw material formula is 100 parts by weight of dried mono / polycrystalline silicon wafer cutting powder granules, 30 parts by weight of clean scrap steel, and 4 parts by weight of metal strontium, and the temperature of the melting furnace is controll...

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Abstract

The invention relates to a silicon-strontium alloy modifier and a preparation method thereof. The preparation method of the silicon-strontium alloy modifier comprises the following steps: (1) drying a single crystal silicon cutting material or a polycrystalline silicon cutting material until the moisture content is 1% The following; (2) Mix 80-100 parts by weight of dried monocrystalline silicon cutting material or polysilicon cutting material with 20-30 parts by weight of scrap steel, and conduct electric heating and melting at 1300-1450 ° C to obtain alloy liquid (3) adding the obtained alloy liquid into 1-4 parts by weight of metal strontium, carrying out the strontium alloying reaction, and then casting and molding to obtain the silicon-strontium alloy modifier. The silicon-strontium alloy modifier and the preparation method thereof provided by the invention can reduce process difficulty and cost, and control the content of aluminum-calcium elements at a relatively low level.

Description

technical field [0001] The invention relates to alloy metal material technology, in particular to a silicon-strontium alloy modifier and a preparation method thereof. Background technique [0002] The main elements of the silicon-strontium alloy modifier are Si and Sr, and the balance is Fe. It is mainly used as a casting inoculant. Since Sr is the most effective inoculant in ferrosilicon inoculants, when the degree of supercooling is large, it has the special effect of reducing the eutectic group, which can reduce the shrinkage cavity and shrinkage defects of the casting. . Compared with ferrosilicon, the silicon-strontium alloy is used as an inoculant, and its ability to reduce white mouth is more than 50% higher than that of ferrosilicon, and it does not significantly increase the number of eutectic groups. Therefore, it is often used for thin-walled or quenched high-sulfur and low-sulfur gray iron parts and ductile iron parts that need to increase the number of ductile...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/08C21C1/10C22C35/00
CPCC21C1/08C21C1/105C22C35/00Y02P10/20
Inventor 包晓刚魏爽史鑫李有成卢建华
Owner SANXIANG ADVANCED MATERIALS
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