KR20160111092A - Composition of silicone carbide-iron powder and silicone-silicone carbide-iron powder based heating agent for iron melt and the manufacturing methods thereof - Google Patents

Abstract

The present invention relates to a silicon carbide-iron based heating agent composite and a silicone-silicon carbide-iron based heating agent composite for molten steel and a manufacturing method thereof and, more specifically, to a molten steel heating agent composite used for increasing a temperature of the molten steel in an iron making process. The silicon carbide-iron based heating agent composite for molten iron includes 70-90 parts by weight of silicon carbide (SiC) and 10-30 parts by weight of iron (Fe). The silicone-silicon carbide-iron based heating agent composite for molten steel includes: 10-40 parts by weight of silicon (Si), 30-90 parts by weight of silicon carbide (SiC), and 10-30 parts by weight of iron (Fe). Especially, the present invention relates to a silicon carbide-iron based heating agent composite and a silicone-silicon carbide-iron based heating agent composite for molten steel using silicon, silicon carbide, and iron containing byproducts obtained by collecting, drying, and separating waste silicon sludge massively generated in processes of manufacturing and processing a photovoltaic material or a semiconductor to be able to recycle and a manufacturing method thereof.

Description

Technical Field [0001] The present invention relates to a silicon carbide-iron system and a silicon-silicon carbide-iron system molten metal tear activator composition and a method of manufacturing the same. BACKGROUND ART [0002]

The present invention relates to a composition of a silicon carbide-iron powder system and a silicon-silicon carbide-iron system molten metal transition agent and a method of manufacturing the same, and more particularly, to a silicon carbide The iron-based molten iron detergent composition comprises 70 to 90 parts by weight of silicon carbide (SiC) and 10 to 30 parts by weight of iron (Fe), and the silicon-silicon carbide- 30 to 90 parts by weight of silicon carbide (SiC) and 10 to 30 parts by weight of iron powder (Fe). Particularly, waste silicon sludge generated in a large amount in the process of manufacturing and processing a solar cell or semiconductor is recycled , Silicon carbide-iron system and silicon-silicon carbide-iron system using molten silicon, silicon carbide, and iron-containing byproducts The present invention relates to an emulsion composition and a method for producing the same.

The purity of silicon used to manufacture and process solar materials and semiconductors is high purity (over 99.9999%). Particularly, a high purity silicon (Si) sludge is discharged in a large amount during processing.

Even when the high-purity silicon sludge generated at this time is dried, silicon (Si) is converted into sludge and is oxidized with oxygen in the air to decrease its purity. In addition, (Si), silicon carbide (SiC), metal impurities (Fe), and cutting oil.

Therefore, in the past, waste silicon sludge has been landfilled by a waste treatment company. Recently, researches have been conducted to recover economic value by recovering and refining materials such as silicon and silicon carbide.

On the other hand, ferrosilicon (FeSi) molded articles having a silicon content of 60% or more are commonly used as a heat generating agent for raising the temperature of molten steel in steelmaking. When the specific gravity is lower than the molten metal, the molten metal floats on the molten metal, And it escapes to the flue gas of the converter and electric furnace without contributing to the temperature rise of the flue gas. In addition, Korean Patent No. 10-1123494 discloses a composition of a silicon-carbon-iron-based molten metal heating substance which is equal to or higher than the specific gravity of a slag in a molten metal and can prevent a reduction in heat generation efficiency.

Korean Patent Publication No. 10-2002-0089080 (published on Nov. 29, 2002, Patent No. 10-0554732) Korean Patent Publication No. 10-2011-0004093 (published on Jan. 13, 2011, Patent No. 10-1123494) Korean Patent Publication No. 10-2002-0079262 (published on October 19, 2002, Patent No. 10-0406920) Korean Patent Publication No. 10-2011-0004093 (published on Jan. 13, 2011, Patent No. 10-1126494)

Disclosure of the Invention The present invention has been conceived to solve the problems of the conventional art as described above, and it is an object of the present invention to provide a silicon carbide-iron-based molten metal transition tent agent composition containing 70 to 90 parts by weight of silicon carbide (SiC) and 10 to 30 parts by weight of iron There is provided a silicon-silicon carbide-iron system molten metal transition taster composition comprising 10 to 40 parts by weight of silicon (Si), 30 to 90 parts by weight of silicon carbide (SiC) and 10 to 30 parts by weight of iron (Fe) For the purpose of the invention.

In addition, the present invention relates to a method for recovering waste silicon sludge, which recovers a large amount in a process of manufacturing or processing a solar photovoltaic material or a semiconductor, by recycling, drying and separating the silicon sludge, It is another object of the present invention to provide a silicon carbide-iron system system and a silicon-silicon carbide-iron system molten metal system heat exchanger composition using the byproduct containing silicon and iron-containing byproducts.

In addition, the present invention provides an economical method for reusing waste silicon sludge, which is being buried in waste, as an economical effective resource by recycling a large amount of waste silicon sludge generated in the process of manufacturing and processing a solar material or semiconductor It is another purpose of the invention to do.

The problems to be solved by the present invention are not limited to those mentioned above, and other problems to be solved can be clearly understood by those skilled in the art from the following description.

In order to accomplish the above object, the present invention provides a composition for a molten metal transition agent used for raising the temperature of a molten metal in a steelmaking process, comprising silicon carbide (SiC) and iron (Fe ). ≪ / RTI >

Also, the silicon carbide-iron-based molten metal transition agent composition according to the present invention is characterized by being 70 to 90 parts by weight of the silicon carbide (SiC) and 10 to 30 parts by weight of the iron (Fe).

The silicon carbide (SiC) composition according to the present invention is characterized in that the silicon carbide (SiC) is a silicon carbide (SiC) contained in the waste silicon sludge generated in the process of manufacturing or processing a solar photovoltaic material or a semiconductor .

Meanwhile, the composition of the silicon-silicon carbide-iron molten metal transition agent composition according to the present invention is a composition of a molten metal transition metal that is used for increasing the temperature of the molten metal in the steelmaking process. The molar ratio of silicon (Si), silicon carbide (SiC) Fe).

The composition of the silicon-silicon carbide-iron system molten metal transition tent agent according to the present invention comprises 10 to 40 parts by weight of the silicon (Si), 30 to 90 parts by weight of the silicon carbide (SiC) and 10 to 30 parts by weight of the iron (Fe) By weight.

The composition of the silicon-silicon carbide-iron system molten metal transition tent agent according to the present invention is such that the silicon (Si), silicon carbide (SiC) and iron (Fe) (Si), silicon carbide (SiC) and iron (Fe) contained in the waste silicon sludge are used.

Meanwhile, a method for producing a composition of a silicon carbide-iron-based molten metal transition agent according to the present invention is a method for manufacturing a molten metal transition agent composition used for raising the temperature of a molten metal in a steelmaking process, SiC) and iron (Fe).

In the method for manufacturing a silicon carbide-iron-based molten metal transition agent composition according to the present invention, the silicon carbide (SiC) is 70 to 90 parts by weight and the iron (Fe) is 10 to 30 parts by weight.

The present invention also provides a process for producing a silicon carbide-iron-based molten metal tannate composition according to the present invention, wherein the silicon carbide (SiC) and iron (Fe) (SiC) and iron (Fe) are contained in the waste sludge, and the silicon carbide alone sludge containing silicon carbide (SiC) but not containing silicon (Si) and iron (Fe) is used as the waste silicon sludge .

In addition, the method for preparing a silicon carbide-iron-based molten metal tannate composition according to the present invention comprises the steps of: analyzing the content of silicon carbide (SiC) in the silicon carbide alone sludge as the waste silicon sludge; And setting the silicon carbide (SiC) to 70 to 90 parts by weight and the iron (Fe) to 10 to 30 parts by weight using the silicon carbide alone sludge and the separate iron (Fe). .

Meanwhile, the method for preparing a silicon-silicon carbide-iron system molten metal transition agent composition according to the present invention is a method for manufacturing a molten metal transition agent composition used for raising the temperature of a molten metal in a steelmaking process, (Si), silicon carbide (SiC), and iron (Fe).

The method for manufacturing a silicon-silicon carbide-iron-based molten metal transition agent composition according to the present invention is characterized in that the silicon (Si) is 10 to 40 parts by weight, the silicon carbide (SiC) is 30 to 90 parts by weight, Fe) is 10 to 30 parts by weight.

The present invention also provides a process for producing a silicon-silicon carbide-iron-based molten metal transition agent composition, wherein the silicon (Si), silicon carbide (SiC) and iron (Fe) (Si), silicon carbide (SiC), and iron (Fe), which are contained in the waste silicon sludge generated in the waste silicon sludge, And iron (Fe), silicon-free sludge containing silicon (Si) but not containing silicon carbide (SiC) and iron (Fe), and silicon carbide (SiC) (Fe) -containing silicon carbide alone sludge is used.

Also, the method for producing a silicon-silicon carbide-iron molten iron bath tanning composition according to the present invention is characterized in that the mixed sludge as the waste silicon sludge, silicon alone sludge, silicon (Si), silicon carbide (SiC) and silicon carbide Analyzing the content of iron (Fe); And 10 to 40 parts by weight of the silicon (Si), 30 to 90 parts by weight of the silicon carbide (SiC), and 10 to 90 parts by weight of the iron (Fe), respectively, using the mixed sludge, the silicon single sludge and the single sludge of silicon carbide. 30 parts by weight per 100 parts by weight of the composition.

According to the composition of the silicon carbide-iron system and silicon-silicon carbide-iron system molten metal transition taster of the present invention having the above-described structure and the method of manufacturing the same, 70 to 90 parts by weight of silicon carbide (SiC) 30 to 90 parts by weight of silicon carbide (SiC) and 10 to 30 parts by weight of iron (Fe), and 10 to 40 parts by weight of silicon (Si) - a composition of a molten iron bath tanning agent and a method for producing the same.

In addition, according to the silicon carbide-iron system and silicon-silicon carbide-iron system molten metal transition agent composition and the manufacturing method thereof according to the present invention, the waste silicon sludge, which is generated in large quantities in the process of manufacturing and processing a solar- (Si), silicon carbide (SiC), and iron (Fe) -containing by-products can be recovered, recycled, and recycled.

In addition, according to the silicon carbide-iron system and silicon-silicon carbide-iron system molten metal transition agent composition and the manufacturing method thereof according to the present invention, a large amount of waste silicon sludge generated in the process of manufacturing and processing a solar cell or a semiconductor, It is possible to provide an economical solution for reusing waste silicon sludge, which is being recycled as waste by recycling, as an economical effective resource.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process flow diagram of a silicon carbide-iron system system and a silicon-silicon carbide-iron system molten bath system initiator composition according to the present invention and a manufacturing method thereof.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the following description. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.

FIG. 1 is a process flow diagram of a composition of a silicon carbide-iron system and a silicon-silicon carbide-iron system molten metal transition agent according to the present invention and a method of manufacturing the same.

The silicon carbide-iron system molten metal transition agent composition according to the present invention can be composed of silicon carbide (SiC) and iron (Fe) in a molten metal transition composition used for raising the temperature of molten metal in a steelmaking process .

The silicon carbide-iron-based molten iron remover composition according to the present invention may comprise 70 to 90 parts by weight of the silicon carbide (SiC) and 10 to 30 parts by weight of the iron (Fe).

Here, the composition of the silicon carbide-iron-based molten metal transition tent agent according to the present invention is characterized in that the silicon carbide (SiC) contained in the waste silicon sludge generated in the process of manufacturing or processing a solar photovoltaic material or a semiconductor And the like.

That is, as described above, the silicon carbide (SiC) and the iron (Fe) may be composed of 70 to 90 parts by weight and 10 to 30 parts by weight, respectively. In actual waste silicon sludge, silicon carbide (SiC) Iron (Fe) is used as the iron (Fe), silicon carbide (SiC) is used as the waste silicon sludge, and silicon carbide (SiC) is contained However, it is more preferable to analyze the content of silicon carbide (SiC) of the silicon carbide alone sludge not containing silicon (Si) and iron (Fe) and set the content thereof. This is because it is not easy to separate and recover silicon carbide (SiC) and iron powder (Fe), respectively, and the recovery cost is also considerably large.

Meanwhile, the composition of the silicon-silicon carbide-iron molten metal transition agent composition according to the present invention is a composition of a molten metal transition metal that is used for increasing the temperature of the molten metal in the steelmaking process. The molar ratio of silicon (Si), silicon carbide (SiC) Fe).

The composition of the silicon-silicon carbide-iron system molten metal transition tent agent according to the present invention comprises 10 to 40 parts by weight of the silicon (Si), 30 to 90 parts by weight of the silicon carbide (SiC) and 10 to 30 parts by weight of the iron (Fe) Weight part.

Here, the composition of the silicon-silicon carbide-iron system molten metal transition tent agent according to the present invention is such that the silicon (Si) and the silicon carbide (SiC) are contained in the waste silicon sludge generated in the process of manufacturing and processing a solar material or a semiconductor (Si), silicon carbide (SiC), and iron (Fe).

That is, it may be configured to include 10 to 40 parts by weight, 30 to 90 parts by weight and 10 to 30 parts by weight of silicon (Si), silicon carbide (SiC) and iron (Fe) (Si), silicon carbide (SiC) and iron (Fe) in the waste silicon sludge as described later can also be used. It is more preferable to analyze the contents and set them according to their contents. This is because it is not easy to separate and recover silicon (Si), silicon carbide (SiC) and iron (Fe), respectively, and the recovery cost is also considerably large.

Silicon sludge or waste generated in large quantities in the process of manufacturing or processing the above-described photovoltaic material or semiconductor is largely divided into (1) by-products generated in the process of manufacturing a single crystal ingot, (2) , And (3) wastes from wafers.

Typically, mixed sludge wastes containing silicon, silicon carbide and iron generated in the ingot growth or pulling process and wafer sawing process by the single crystal growth (Si) process are generated. .

Ingot Processing and Wafer Manufacturing Waste discharged from the processing process is mixed with the cutting-abrasive solution applied for lubrication and cooling in the cutting-grinding process. In the lapping process, the slurry is discharged in the form of a slurry or turbid liquid. At this time, the high purity silicon carbide (SiC) abrasive material and iron (Fe) as well as the kerf of the high purity silicon material are mixed with the cutting solution and discharged.

This discarded silicon (Si) is mixed with silicon carbide (SiC) particles and slurries and is discarded and contains metal impurities from the wire saw and glass from the ingot mounting stage.

Ingot Processing and Wafer Manufacturing Waste discharged from the processing process is mixed with cutting-abrasive solution used for lubrication and cooling in the cutting-polishing process, and the virgin silicon carbide (SiC) (About 99%) of silicon (Si) is 99.99% or more, and a metal wire used for a cutting wire capable of cutting at the same time with a plurality of wafers is generally an iron wire having Fe as a main component (about 98%).

In fact, the waste generated when cutting a single crystal silicon ingot for solar cell in Korea is ~ 50 wt% silicon carbide (SiC), ~ 20 wt% lubricating oil, ~ 10 wt% cutting wire and ~ 20% (Si), and the waste sludge is not always discharged as a constant component.

Table 1 below shows the result of analyzing the components of the product after separating the oil from the waste silicon sludge generated when cutting the silicon ingot and separating and recovering the iron powder, silicon and silicon carbide.

     Product  wt% Oil and Additives  24 Fe  10 Si  18 SiC  48 Total 100

The centrifuged sludge includes oil, silicon (Si), silicon carbide (SiC), iron (Fe) and the like. Oils and silicon (Si), silicon carbide (SiC) and iron (Fe) are derived from the cutting base material during the cutting process and the oil is usually ethylene glycol (EG), poly ethylene glycol (PEG), diethylene glycol And the like.

Silicon content of waste generated from pot scrap, wafer processing, grinding, sawing, and lapping processes during ingot growth or pulling by single crystal growth (Si) As shown in Table 1, the silicon carbide (SiC) content is high in the wastewater treatment plant sludge after the silicon solid content is separated.

As shown in Table 2, in the case of pot scrap and wastes generated during wafer processing, grinding, sawing, and lapping processes during ingot growth or pulling by single crystal growth of silicon (Si) Silicon carbide (SiC) content is high in the sludge of the wastewater treatment plant which is discarded after silicon solid content is separated, as shown in Table 1 above. [Table 2] shows the results of analysis of waste samples generated in the grinding, sawing, and lapping processes. In Table 2, 'Si' as a main component does not denote an element representing the result of the component analysis but refers to silicon (Si) of high purity basically referred to in the present invention.

                                                     Unit: wt% main
ingredient Sample name No1 No2 No3 No4 No5 No6 No7 No8 Al 3.0 1.9 0.2 0.1 0.1 0.0 0.02 2.8 Si 90.8 86.7 97.7 97.2 95.7 97.2 97.4 76.5 Fe 0.0 0.0 0.6 1.2 0.0 0.0 0.02 0.04 C 2.0 1.1 0.5 0.3 0.4 0.3 0.08 1.94 O 3.4 8.7 0.4 0.6 3.4 2.1 1.67 18.1 N 0.1 0.3 0.0 0.0 0.0 0.0 0.02 0.30 H 0.2 0.6 0.1 0.0 0.1 0.1 - -

Silicone Carbide is a nonfusible covalent compound with SiC, molecular weight of 40.1 and specific gravity of 3.21, which is used as an abrasive and used as a refractory. [Table 3] is an analysis table of the composition of wastes generated in the process of manufacturing a silicon carbide (SiC) abrasive.

                                                           Unit: wt%

SiC

water

Chemical composition (%)
SiC F.C SiO ₂ Fe ₂ O ₃ 95% 95 ± 1 ≤1 ? 3.0 ≤1 90% 90 ± 1 ≤1.2 ≤4 ≤1 85% 85 ± 1 ≤2 ≤7 1.5 80% 80 ± 1 ≤ 5 ≤10 ≤3.5 70% 70 ± 1 ≤15 ≤10.6 ≤3.5 60% 60 ± 1 ≤ 22 ≤ 11.2 ≤3.5 50% 50 ± 1 ≤25 ≤12 ≤3.5

As described above, when silicon carbide (SiC) and iron (Fe) are not present at all in addition to silicon (Si) and silicon carbide (SiC) mixed sludge containing both silicon (Si), silicon carbide (Si) and iron (Fe) as a sludge generated in a silicon carbide (SiC) abrasive production process or the like are present or not present at all in a silicon carbide single sludge [Table 3]) and various kinds of waste silicon sludge are generated.

In the process of ingot growth or pulling by the single crystal growth method, the silicon content in the pot scrap, wafer processing, grinding, sawing, and lapping processes is high (see Table 2 ]) Alone or in combination with sludge in a wastewater treatment plant with high silicon carbide (SiC) content, can be used for adjusting the composition of the steel industry, as an alloying element, a de-oxidizing agent and a slagging agent Can be utilized.

Ingot processing and wafer manufacturing Waste discharged from the processing process is mixed with the cutting-abrasive solution applied for lubrication and cooling in the cutting-polishing process and discharged to the wastewater treatment plant, where the silicon carbide (SiC) content (Fe) and relatively low silicon (Si) content but contains oil-soluble or water-soluble oil. This waste sludge is not always discharged as a constant component. However, when the waste sludge waste is recovered and purified, silicon carbide (SiC), silicon (Si) and iron (Fe) having the contents as shown in Table 4 can be recovered.

  Product             wt% Best   lowest SiC 64 60.3 Si 25 21.5 Fe 10 5.2

Meanwhile, a method for producing a composition of a silicon carbide-iron-based molten metal transition agent according to the present invention is a method for manufacturing a molten metal transition agent composition used for raising the temperature of a molten metal in a steelmaking process, SiC) and iron (Fe).

In the method for manufacturing a silicon carbide-iron-based molten metal transition agent composition according to the present invention, the silicon carbide (SiC) may be 70 to 90 parts by weight and the iron (Fe) may be 10 to 30 parts by weight.

The present invention also provides a process for producing a silicon carbide-iron-based molten metal tannate composition according to the present invention, wherein the silicon carbide (SiC) and iron (Fe) (SiC) and iron (Fe) are contained in the waste sludge, and the silicon sludge containing silicon carbide (SiC) but not containing silicon (Si) and iron (Fe) [Table 3]) can be used.

More specifically, as shown in FIG. 1, the method for preparing a silicon carbide-iron-based molten metal bath tanning composition according to the present invention is characterized in that the content of silicon carbide (SiC) in the silicon carbide alone sludge in the waste silicon sludge is analyzed step; And setting the silicon carbide (SiC) to 70 to 90 parts by weight and the iron (Fe) to 10 to 30 parts by weight using the silicon carbide alone sludge and the separate iron (Fe) .

Meanwhile, the method for preparing a silicon-silicon carbide-iron system molten metal transition agent composition according to the present invention is a method for manufacturing a molten metal transition agent composition used for raising the temperature of a molten metal in a steelmaking process, (Si), silicon carbide (SiC), and iron (Fe).

The method for manufacturing a silicon-silicon carbide-iron-based molten metal transition agent composition according to the present invention is characterized in that the silicon (Si) is 10 to 40 parts by weight, the silicon carbide (SiC) is 30 to 90 parts by weight, Fe) may be 10 to 30 parts by weight.

The present invention also provides a process for producing a silicon-silicon carbide-iron-based molten metal transition agent composition, wherein the silicon (Si), silicon carbide (SiC) and iron (Fe) (Si), silicon carbide (SiC), and iron (Fe), which are contained in the waste silicon sludge generated in the waste silicon sludge, (Table 2) containing silicon (Si) but not silicon carbide (SiC) and iron (Fe) (Table 2) and mixed sludge containing iron (Fe) (Table 3) containing silicon carbide (SiC) but not containing silicon (Si) and iron (Fe).

More specifically, the method for producing a silicon-silicon carbide-iron-based molten-bath heat transfer agent composition according to the present invention comprises mixing sludge as a waste silicon sludge, silicon-exclusive sludge, and silicon Si), silicon carbide (SiC), and iron (Fe), respectively; And 10 to 40 parts by weight of the silicon (Si), 30 to 90 parts by weight of the silicon carbide (SiC), and 10 to 90 parts by weight of the iron (Fe), respectively, using the mixed sludge, the silicon single sludge and the single sludge of silicon carbide. 30 parts by weight per 100 parts by weight of the total weight of the composition.

That is, silicon (Si), silicon carbide (SiC) and iron (Fe) of the mixed sludge are mixed with silicon (Si) of silicon alone sludge and silicon carbide (SiC) 10 to 40 parts by weight of silicon carbide (SiC), 30 to 90 parts by weight of silicon carbide (SiC) and 10 to 30 parts by weight of iron powder (Fe). In some cases, the mixed sludge may satisfy the above- At least one sludge of silicon-exclusive sludge and silicon-carbide-exclusive sludge, and a separate iron (Fe), so that the above-mentioned conditions can be satisfied.

In the present invention, by setting the particle diameter of iron (Fe) separately used in addition to the iron powder contained in the mixed sludge within the range of 0.5 to 10 mm, the dissolution rate of the silicon, silicon carbide, and iron powder can be increased and the heat generation efficiency can be increased .

Hereinafter, the silicon carbide-iron powder system and the silicon-silicon carbide-iron system molten salt heat exchanger composition according to the present invention will be described in more detail with reference to the examples prepared by adding the binder to the bricket. However, these examples are for illustrating the present invention, and the present invention is not limited by these examples.

[ Comparative Example  ]

First, comparative examples of the examples according to the present invention are the compositions disclosed in Korean Patent No. 10-0554732 (Comparative Example 1) and Korean Patent No. 10-1123494 (Comparative Example 2), respectively, ] And [Table 6].

division matter weight% Size (mm) Remarks Composition (1)
Carbon 5 ~ 40
Molded product Ferrosilicon (FeSi) 60 ~ 95 1 to 10 Composition (2)
Carbon 5 to 30 Silicon carbide (SiC) 70 ~ 95 1 to 10

division matter weight% Size (mm) Remarks Composition (1) Carbon 55 ~ 70
Molded product Ferrosilicon (FeSi) 5-20 Iron-containing byproduct 10 to 40 0.5 to 10 Composition (2) Carbon 55 ~ 70 Silicon carbide (SiC) 5-20 Iron-containing byproduct 10 to 40 0.5 to 10

Next, an embodiment according to the present invention is configured as shown in Table 7 below.

division matter weight% Size (mm) Remarks Composition (1) silicon 10 to 40
Molded product Silicon carbide (SiC) 30 to 90 iron content 10 to 30 0.5 to 10 Composition (2) Silicon carbide (SiC) 70 to 90
Molded product iron content 10 to 30 0.5 to 10

(1) a mixed sludge containing silicon (Si) and silicon carbide (SiC) generated in a large amount in the process of manufacturing and processing a photovoltaic material or a semiconductor, (2) ) In the process of ingot growth or pulling by Si single crystal growth method, the waste sludge which separated silicon (Si) solid from waste generated from pot scrap, wafer processing, grinding, sawing and lapping process (3) Silicon carbide (SiC) Silicon carbide (SiC) does not exist at all or is present in a very small amount, and (3) Silicon carbide (SiC) The contents of silicon (Si) and silicon carbide (SiC) were analyzed after drying the silicon carbide single sludge.

First, the composition of the silicon-silicon carbide-iron-based molten metal transition taster composition according to the present invention as the first embodiment is determined based on the content analysis value of the above-described sludges, based on the compounding ratio of silicon, silicon carbide, To 1 2, and the mixture was kneaded for about 15 minutes by adding a binder of 7% by weight of the combined weight.

Next, a total weight of 1 ton was matured for 1 hour or more, and then a plurality of elliptical briquettes were molded by applying an oil pressure of 40,000 psi in a hydraulic roll molding machine. The resultant was further dried in a dryer preheated to 100 ° C for 1 hour And the mixture was slowly cooled in air to prepare a silicon-silicon carbide-iron molten metal transition agent according to the present invention.

Next, as a second embodiment, the composition of the silicon carbide-iron system molten metal transition taster according to the present invention is characterized in that, based on the analyzed value of the silicon carbide content of the silicon carbide alone sludge in the sludges, Were mixed so as to have the blending ratios as shown in Examples 2-1 to 2-3 of Table 8, and the resulting mixture was kneaded for about 15 minutes by adding a binder of 7% by weight of the combined weights.

Next, a total weight of 1 ton was matured for 1 hour or more, and then a plurality of elliptical briquettes were molded by applying an oil pressure of 40,000 psi in a hydraulic roll molding machine. The resultant was further dried in a dryer preheated to 100 ° C for 1 hour And the mixture was slowly cooled in air to prepare a silicon-silicon carbide-iron molten metal transition agent according to the present invention.

[ Test Example  ]

The specific gravity and calorific value were measured in order to evaluate the heating efficiency of the molten metal transition agent used to increase the temperature of the molten steel in the steelmaking process. Comparative Examples 1 (1-1 to 1-6) and Comparative Examples 2 (2-1 to 2-12) and Examples 1 (1-1 to 1-12) according to the present invention and Comparative Examples 1 The results of Example 2 (2-1 to 2-3) are shown.

division Weight% importance
(g /) Calorific value
(cal / g) Ferro silicon silicon
carbide silicon Carbon iron content FeSi SiC Si C Fe Comparative Example 1-1 50 50 2.6 3,900 Comparative Example 1-2 60 40 2.9 4,040 Comparative Example 1-3 70 30 3.1 4,070 Comparative Example 1-4 50 50 2.2 3,230 Comparative Example 1-5 60 40 2.25 3,900 Comparative Example 1-6 70 30 2.3 4,060 Comparative Example 2-1 5 70 25 2.5 5,320 Comparative Example 2-2 10 60 30 2.8 4,610 Comparative Example 2-3 5 55 40 3.2 4,220 Comparative Example 2-4 20 70 10 2.5 4,450 Comparative Example 2-5 20 60 20 2.7 4,290 Comparative Example 2-6 20 55 25 2.9 4,200 Comparative Example 2-7 5 70 25 2.4 4,740 Comparative Example 2-8 10 60 30 2.7 4,700 Comparative Example 2-9 5 55 40 3.0 4,210 Comparative Example 2-10 20 70 10 2.5 4,520 Comparative Example 2-11 20 60 20 2.7 4,420 Comparative Examples 2-12 20 55 25 2.8 4,170 Example 1-1 70 20 10 2.45 5,546 Examples 1-2 60 20 20 2.6 4,869 Example 1-3 50 20 30 2.75 4,344 Examples 1-4 60 30 10 2.4 5,613 Examples 1-5 50 30 20 2.55 5,011 Examples 1-6 40 30 30 2.7 4,409 Examples 1-7 50 40 10 2.4 5,678 Examples 1-8 40 40 20 2.5 5,075 Examples 1-9 30 40 30 2.7 4,473 Example 1-10 80 10 10 2.5 5,481 Example 1-11 70 10 20 2.6    4,880 Examples 1-12 60 10 30 2.8 4,275 Example 2-1 90 10 2.4 5,419 Example 2-2 80 20 2.6 4,817 Example 2-3 70 30 2.8 4,214

The specific gravity of the slag in the molten metal is in the range of 2.4 to 2.7. In Table 8, the comparative examples 1-1 to 1-6 and the comparative examples 2-1 to 2-12 are in the range of 2.25 to 3.2, Examples 1-1 to 1-12 as a molten-metal heat-activating agent according to the composition of a silicon-silicon carbide-iron-based molten-metal tantalizing agent according to the present invention and Examples of the molten metal transition agent of the silicon carbide- 2-1 to 2-3 are almost equal to each other in the range of 2.4 to 2.8. Thus, it can be seen that the molten metal transition temperature of the silicon-silicon carbide-iron system and the silicon carbide- Can be more stably penetrated into the molten slag without being floated on the molten metal, so that it can be predicted that the heat generation efficiency with respect to the molten metal can be prevented from being significantly lowered.

In addition, the calorific values of Comparative Examples 1-1 to 1-6 and Comparative Examples 2-1 to 2-12 were calculated to be in the range of 3,230 to 5,320 cal / g. As a result, the silicon-silicon carbide-iron system and Examples 1-1 to 1-12 and Examples 2-1 to 2-3 of the molten metal transition agent by the composition of the silicon carbide-iron system molten transition metal initiator exhibited a higher calorific value in the range of 4,214 to 5,678 cal / g can confirm.

As described above, according to the silicon-silicon carbide-iron system system and the silicon carbide-iron system molten steel transition system using the silicon-silicon carbide-iron system and silicon carbide-iron system molten metal transition agent composition according to the present invention, It can be confirmed that the heating efficiency for the molten metal as the exothermic agent is very excellent.

As a result, the present invention utilizes waste silicon sludge that is discharged from the waste, thereby making use of silicon (Si), silicon carbide (SiC), and iron (Fe) It is a very economical manufacturing method in terms of value stock.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (14)

A composition for a molten metal transition metal used for raising the temperature of a molten metal in a steelmaking process,
Wherein the composition contains silicon carbide (SiC) and iron (Fe).
The method according to claim 1,
Wherein the silicon carbide (SiC) is 70 to 90 parts by weight and the iron (Fe) is 10 to 30 parts by weight.
3. The method according to claim 1 or 2,
Wherein the silicon carbide (SiC) comprises silicon carbide (SiC) contained in the waste silicon sludge generated in the process of manufacturing or processing a solar material or a semiconductor.
A composition for a molten metal transition metal used for raising the temperature of a molten metal in a steelmaking process,
A silicon-silicon carbide-iron type molten metal transition tent agent composition characterized by comprising silicon (Si), silicon carbide (SiC), and iron (Fe).
5. The method of claim 4,
Wherein the composition is 10 to 40 parts by weight of the silicon (Si), 30 to 90 parts by weight of the silicon carbide (SiC), and 10 to 30 parts by weight of the iron (Fe).
The method according to claim 4 or 5,
The silicon (Si), silicon carbide (SiC), and iron (Fe) may be silicon (Si), silicon carbide (SiC), and iron (Fe) contained in the waste silicon sludge Fe). ≪ / RTI >
A method for manufacturing a molten metal transition agent composition used for increasing the temperature of a molten metal in a steelmaking process,
Wherein the composition of the molten metal transition agent contains silicon carbide (SiC) and iron (Fe).
8. The method of claim 7,
Wherein the silicon carbide (SiC) is 70 to 90 parts by weight and the iron (Fe) is 10 to 30 parts by weight.
9. The method of claim 8,
The silicon carbide (SiC) and the iron powder (Fe) may be prepared by using silicon carbide (SiC) and separate iron (Fe) contained in the waste silicon sludge generated in the process of manufacturing or processing a solar material or a semiconductor,
Wherein the waste silicon sludge is made of silicon carbide alone sludge containing silicon carbide (SiC) but not containing silicon (Si) and iron (Fe).
10. The method of claim 9,
Analyzing the content of silicon carbide (SiC) in the silicon carbide alone sludge as the waste silicon sludge; And
Setting 70 to 90 parts by weight of the silicon carbide (SiC) and 10 to 30 parts by weight of the iron (Fe) using the silicon carbide alone sludge and the separate iron (Fe);
Iron-based molten metal transition agent composition.
A method for manufacturing a molten metal transition agent composition used for increasing the temperature of a molten metal in a steelmaking process,
Wherein the composition of the molten metal transition agent contains silicon (Si), silicon carbide (SiC), and iron (Fe).
12. The method of claim 11,
Wherein the silicon (Si) is 10 to 40 parts by weight, the silicon carbide (SiC) is 30 to 90 parts by weight, and the iron (Fe) is 10 to 30 parts by weight. ≪ / RTI >
13. The method of claim 12,
The silicon (Si), silicon carbide (SiC), and iron (Fe) may be silicon (Si), silicon carbide (SiC), and iron (Fe) contained in the waste silicon sludge Fe) and a separate iron (Fe)
A mixed sludge containing silicon (Si), silicon carbide (SiC) and iron (Fe) as the waste silicon sludge, a mixed sludge containing silicon (Si) and no silicon carbide (SiC) And a silicon carbide single sludge containing silicon carbide (SiC) but not containing silicon (Si) and iron (Fe) is used.
14. The method of claim 13,
Analyzing contents of silicon (Si), silicon carbide (SiC) and iron (Fe) in the mixed sludge, the silicon single sludge and the silicon carbide single sludge as the waste silicon sludge; And
(Si) and 30 to 90 parts by weight of the silicon (Si) and 10 to 30 parts by weight of the iron (Fe), respectively, using the mixed sludge, the silicon single sludge and the single sludge of silicon carbide. Setting a weight to be added;
Silicon carbide-iron system molten metal transition agent composition.

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