KR102558949B1 - Binder for briquette and use of the same - Google Patents

Abstract

An example of the present invention is 65 to 92% by weight of glucose, 2 to 20% by weight of a disaccharide having a degree of polymerization of 2 based on glucose, 1 to 15% by weight of a trisaccharide having a degree of polymerization of 3 based on glucose and an oligosaccharide having a degree of polymerization of 4 to 12 based on glucose based on the weight of saccharide solid content Provides a binder for metal-containing dust-based briquettes containing 1 to 12% by weight of The binder for metal-containing dust-based briquettes according to an example of the present invention is composed of a mixture of various sugars, so it is harmless to the human body and does not generate odor during briquette manufacturing, so workability can be improved. In addition, the metal-containing dust-based binder for briquettes according to an example of the present invention can improve the formability and strength of briquettes compared to molasses used as a conventional binder for briquettes, and has excellent economic efficiency due to a reduced amount of addition, and potassium in briquettes. It is possible to minimize the content of impurities such as sodium and phosphorus.

Description

Binder for briquette and use thereof {Binder for briquette and use of the same}

The present invention relates to a binder for briquettes and its use, and more particularly, to a binder that can be added as one component of briquettes used in the metal smelting field to improve the formability or strength of briquettes, briquettes comprising the same, and a method for producing briquettes using the same.

By-products such as dust or metal-containing materials in a fine particle state generated in the steelmaking or steelmaking field, metal processing treatment, or ferroalloy manufacturing process are collected in a fine powder state by a dust collector or the like. By-products such as dust or metal-containing materials in the form of fine particles recovered in this way can be effective resources as metal raw materials.

However, by-products containing such metal powders are very inconvenient to handle, such as transportation, storage, and storage, because scattering occurs even with a small movement. For example, when metal-containing dust is introduced into a blast furnace during alloy manufacturing, the metal-containing dust is scattered and lost due to the heat emitted from the blast furnace and the supply of acid, impairing the working environment, and making it impossible to constantly adjust the composition ratio of the special steel to be produced during steelmaking in the furnace. Therefore, by-products including these metal powders are reused as raw materials for steelmaking and ironmaking after being transformed into a state in which they are easily handled by briquetting.

When metal-containing dust is produced in the form of briquettes, various binders are used to facilitate molding and secure a certain strength. For example, Korean Patent Registration No. 10-2258892 uses water glass as a binder to prepare microscopic briquettes. In addition, Korean Patent Registration No. 10-2231654 uses starch as a binder to manufacture iron-containing briquettes. In addition, Korean Patent Registration No. 10-2175833 uses a cellulose ether compound as a binder to manufacture iron-containing briquettes. In addition, Korean Patent Registration No. 10-1887113 uses a mixture of various ingredients such as polyvinyl alcohol, carrageenan, locust bean gum, hydroxyethyl cellulose, borax, boric acid, and sodium metaborate as a binder to prepare metal by-product briquettes. In addition, Korean Patent Registration No. 10-1768048 uses molasses, starch, bentonite or water glass as a binder to prepare copper sludge briquettes.

The present invention was derived under the conventional technical background, and an object of the present invention is to provide a binder that can be added as one component of briquettes to improve the moldability or strength of briquettes when manufacturing briquettes based on metal-containing dust. It is to provide. In addition, an object of the present invention is to provide a method for producing briquettes using the binder.

In order to solve the above object, an example of the present invention is 65 to 92% by weight of glucose, 2 to 20% by weight of a disaccharide having a degree of polymerization of 2 based on glucose, 1 to 15% by weight of a trisaccharide having a degree of polymerization of 3 based on glucose and a degree of polymerization of 4 based on glucose based on the weight of the saccharide solid content It provides a binder for metal-containing dust-based briquettes containing 1 to 12% by weight of oligosaccharides of 12 to 12.

In order to solve the above object, one example of the present invention provides a metal-containing dust-based briquette comprising metal-containing dust and a binder for the briquettes and having the form of a composition.

In order to solve the above object, one example of the present invention comprises preparing a mixture for briquette molding by mixing metal-containing dust, the binder for briquettes and water; And it provides a method for producing metal-containing dust-based briquettes, comprising the step of producing a molding by compression molding the briquette molding mixture.

The binder for metal-containing dust-based briquettes according to an example of the present invention is composed of a mixture of various sugars, so it is harmless to the human body and does not generate odor during briquette manufacturing, so workability can be improved. In addition, the metal-containing dust-based binder for briquettes according to an example of the present invention can improve the formability and strength of briquettes compared to molasses used as a conventional binder for briquettes, and has excellent economic efficiency due to a reduced amount of addition, and potassium in briquettes. It is possible to minimize the content of impurities such as sodium and phosphorus. Therefore, it is possible to improve the purity of the metal extracted during metal smelting using the metal-containing dust-based briquette according to an example of the present invention.

Hereinafter, the present invention will be described in detail.

One aspect of the present invention relates to a binder used in the manufacture of metal-containing dust-based briquettes.

The binder for metal-containing dust-based briquettes according to an example of the present invention contains 65 to 92% by weight of glucose, 2 to 20% by weight of a disaccharide having a degree of polymerization of 2 based on glucose, 1 to 15% by weight of a trisaccharide having a degree of polymerization of 3 based on glucose and polymerization based on glucose It contains 1 to 12% by weight of oligosaccharides having a degree of 4 to 12. In addition, the binder for metal-containing dust-based briquettes according to an example of the present invention is preferably 70 to 90% by weight of glucose, 3 to 18% by weight of a disaccharide having a degree of polymerization of 2 based on glucose, 1.5 to 12% by weight of a trisaccharide having a degree of polymerization of 3 based on glucose and glucose ( Glucose)-based oligosaccharides having a degree of polymerization of 4 to 12 are included at 1.5 to 10% by weight. In addition, the metal-containing dust-based binder for briquettes according to an example of the present invention is more preferably 75 to 90% by weight of glucose based on the weight of the sugar solid content, 3 to 15% by weight of a glucose-based disaccharide having a degree of polymerization of 2, 1.5 to 10% by weight of a glucose-based trisaccharide having a degree of polymerization of 3, and glucose (Glucose)-based oligosaccharides having a degree of polymerization of 4 to 10 are included at 1.5 to 10% by weight.

Among the sugars constituting the binder for metal-containing dust-based briquettes according to an example of the present invention, the disaccharide is not particularly limited as long as it has glucose as a unit structure, and is preferably maltose or isomaltose. The trisaccharide is not particularly limited as long as it has glucose as a unit structure, and is preferably selected from maltotriose, panose, or isomaltotriose. In addition, the oligosaccharide is not particularly limited as long as it has glucose as a unit structure, and is preferably selected from malto-oligosaccharide or isomalto-oligosaccharide. Examples of the maltooligosaccharide include maltotetraose, maltopentaose, maltohexaose, maltoheptaose, maltooctaose, maltononaose, maltodecaose, and the like. In addition, the isomalto-oligosaccharide includes isomaltotetraose, isomaltopentaose, isomaltohexaose, isomaltoheptaose, isomaltooctaose, isomaltononaose, isomaltodecaose, and the like.

The binder for metal-containing dust-based briquettes according to an example of the present invention preferably has a liquid form in consideration of economic feasibility. When the binder for metal-containing dust-based briquettes according to an example of the present invention is in liquid form, the solid content concentration is preferably 50 to 80 Brix and 55 to 70 Brix when considering economic feasibility, briquette moldability, etc. It is more preferable.

One aspect of the present invention relates to a metal-containing dust-based briquette having excellent formability, strength, and the like, and a manufacturing method thereof.

Metal-containing dust-based briquettes according to an example of the present invention include metal-containing dust and the above-mentioned binder for briquettes, and have the form of a composition.

In the metal-containing dust-based briquettes according to an example of the present invention, the content relationship between the metal-containing dust and the binder for briquettes is not significantly limited. The metal-containing dust-based briquettes according to an example of the present invention preferably include 2 to 10 parts by weight of a binder for briquettes based on 100 parts by weight of metal-containing dust based on dry weight when considering formability, strength, economy, etc., and metal-containing dust. It is more preferable to include 3 to 8 parts by weight of a binder for briquettes based on 100 parts by weight.

Metal-containing dust, which is one component of the metal-containing dust-based briquettes according to an example of the present invention, means metal dust having a particle diameter of about 8 mm or less, preferably 5 mm or less. The metal content in the metal-containing dust is preferably 50 to 99.99% by weight and more preferably 80 to 99% by weight when considering the moldability of briquettes and the economics of the smelting process using briquettes. The type of metal constituting the metal-containing dust is not significantly limited, and includes iron, carbon steel, alloy, zinc, titanium, aluminum, silver, gold, platinum, palladium, copper, manganese, tin, molybdenum oxide, titanium oxide, and the like. In addition, the particle size of the metal-containing dust used in the present invention is preferably 0.01 to 5 mm, more preferably 0.05 to 2.5 mm, when considering the compatibility with the binder for briquettes and the quality of briquettes.

Method for producing metal-containing dust-based briquettes according to an example of the present invention comprises the steps of preparing a mixture for briquette molding by mixing metal-containing dust, the above-described binder for briquettes, and water; And producing a molded article by compression molding the briquette molding mixture. In addition, the method for manufacturing metal-containing dust-based briquettes according to an example of the present invention may preferably further include drying the briquette molding mixture.

In the method for producing metal-containing dust-based briquettes according to an example of the present invention, the briquette molding mixture preferably includes 2 to 10 parts by weight of a binder based on 100 parts by weight of metal-containing dust based on dry weight, and more preferably based on dry weight. It contains 3-8 parts by weight of binder based on 100 parts by weight of metal-containing dust. In addition, the water content of the briquette molding mixture is not significantly limited as long as it ensures smooth compression molding, and may be selected, for example, in the range of 5 to 20% by weight (w / w), and 6 to 15% by weight (w / w). It is preferable to select in the range. In addition, in the step of preparing the briquette molding mixture in the method for manufacturing metal-containing dust-based briquettes according to an example of the present invention, the amount of water added may be adjusted according to the moisture content of the previously set briquette molding mixture.

In the method for manufacturing metal-containing dust-based briquettes according to an example of the present invention, the pressure applied during compression molding is not significantly limited as long as the molding is secured, and may be, for example, 50 to 400 kgf, and 80 to 300 kgf.

In the method for producing metal-containing dust-based briquettes according to an example of the present invention, the drying temperature is not significantly limited, and may be selected from, for example, 50 to 200 ° C and 60 to 190 ° C. In addition, the drying time in the method for producing metal-containing dust-based briquettes according to an example of the present invention is not significantly limited, and may be selected from, for example, 0.5 to 48 hr and 1 to 24 hr.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are only for clearly illustrating the technical features of the present invention, but do not limit the protection scope of the present invention.

1. Preparation of Binder for Forming Metal-Containing Dust-Based Briquettes

A liquid binder for briquettes having a solid content concentration of about 60 Brix and various saccharide compositions was prepared by combining various saccharide products from Daesang Co., Ltd. The sugar component and content of the prepared liquid binder for briquettes were analyzed by HPLC, and the results are summarized in Table 1 below.

Binder Classification Sugar composition and content (wt%, based on total weight of sugar solids by HPLC peak area) DP1 DP2 DP3 DP4+ binder 1 100 binder 2 16.8 22.7 22.9 30.1 binder 3 2.3 56.6 19.3 21.8 binder 4 81.5 5.3 3.5 5.7 binder 5 87.1 4.5 2.32 6.02 binder 6 81 10.1 6.7 2.2 binder 7 72 15.5 8.1 4.4

* DP1: Glucose

* DP2: Glucose-based disaccharide with a degree of polymerization of 2

* DP3: Glucose-based trisaccharide with a degree of polymerization of 3

* DP4+: Glucose-based oligosaccharides with a degree of polymerization of 4 to 12

2. Manufacture of metal-containing dust-based briquettes

Preparation Example 1.

To 470 g of zinc dust (moisture content: 2.0 wt%), 38.38 g of binder 1 prepared above and a predetermined amount of water were added and uniformly mixed at room temperature for about 5 minutes to prepare a mixture having a moisture content of about 7 wt%. Thereafter, the mixture was compression molded with a hydraulic press molding machine (pressure: 90 kgf) to prepare briquettes having a thickness of about 4 cm.

Preparation Example 2.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 1, except that Binder 2 prepared above was used as a binder for briquettes.

Preparation Example 3.

Briquettes were prepared in the same conditions and in the same manner as in Preparation Example 1, except that Binder 3 prepared above was used as a binder for briquettes.

Preparation Example 4.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 1, except that Binder 4 prepared above was used as a binder for briquettes.

Preparation Example 5.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 1, except that Binder 5 prepared above was used as a binder for briquettes.

Preparation Example 6.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 1, except that Binder 6 prepared above was used as a binder for briquettes.

Preparation Example 7.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 1, except that Binder 7 prepared above was used as a binder for briquettes.

Preparation Example 8.

53.74 g of binder 4 prepared above and a predetermined amount of water were added to 470 g of zinc dust (moisture content: 2.0% by weight) and uniformly mixed at room temperature for about 5 minutes to prepare a mixture having a water content of about 7% by weight. Thereafter, the mixture was compression molded with a hydraulic press molding machine (pressure: 90 kgf) to prepare briquettes having a thickness of about 4 cm.

Preparation Example 9.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 8, except that Binder 5 prepared above was used as a binder for briquettes.

Preparation Example 10.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 8, except that Binder 6 prepared above was used as a binder for briquettes.

Preparation Example 11.

Briquettes were prepared under the same conditions and in the same manner as in Preparation Example 8, except that Binder 7 prepared above was used as a binder for briquettes.

Comparative Preparation Example 1.

28.79 g of molasses having a solid content of about 80 Brix and a predetermined amount of water as a binder were added to 470 g of zinc dust (moisture content: 2.0% by weight) and mixed uniformly at room temperature for about 5 minutes to prepare a mixture having a water content of about 7% by weight. Thereafter, the mixture was compression molded with a hydraulic press molding machine (pressure: 90 kgf) to prepare briquettes having a thickness of about 4 cm.

Comparative Preparation Example 2.

40.30 g of molasses having a solid content of about 80 Brix as a binder and a predetermined amount of water were added to 470 g of zinc dust (moisture content: 2.0% by weight) and mixed uniformly at room temperature for about 5 minutes. A mixture having a water content of about 7% by weight was prepared. Thereafter, the mixture was compression molded with a hydraulic press molding machine (pressure: 90 kgf) to prepare briquettes having a thickness of about 4 cm.

3. Measurement of physical properties of metal-containing dust-based briquettes

(1) Measurement of drop strength

Immediately after preparing the briquettes in Preparation Examples 1 to 11, Comparative Preparation Example 1 and Comparative Preparation Example 2, the prepared briquettes were repeatedly dropped from a height of 1.5 m from the ground and the number of falls when the briquettes were broken was measured.

(2) Measurement of initial compressive strength

Immediately after preparing the briquettes in Preparation Examples 1 to 11, Comparative Preparation Example 1 and Comparative Preparation Example 2, a load was applied by pressing the upper part of the prepared briquettes at a constant speed, and the maximum load when the briquettes were destroyed was measured.

(3) Measurement of late compressive strength

After drying the briquettes prepared in Preparation Examples 1 to 11, Comparative Preparation Example 1 and Comparative Preparation Example 2 at about 190 ° C. for 1 hr, a load was applied by pressing the top of the dried briquettes at a constant speed, and the maximum load when the briquettes were destroyed was measured.

(4) Result of measuring briquette properties

Table 2 below summarizes the results of measuring the physical properties of the briquettes.

briquette division Binder Classification Binder added amount (%) drop strength
(number) initial compressive strength
(kgf) Late Compressive Strength
(kgf) Preparation Example 1 binder 1 5 One 29.9 218 Preparation Example 2 binder 2 5 6 48.5 370 Preparation Example 3 binder 3 5 4 29.5 265 Production Example 4 binder 4 5 6 46.1 264 Preparation Example 5 binder 5 5 6 44.6 288 Preparation Example 6 binder 6 5 6 44.5 450 Preparation Example 7 binder 7 5 4 45.3 264 Preparation Example 8 binder 4 7 6 52.2 460 Preparation Example 9 binder 5 7 6 53.5 460 Preparation Example 10 binder 6 7 6 51.8 390 Preparation Example 11 binder 7 7 6 51.4 401 Comparative Preparation Example 1 molasses 5 4 31.5 133 Comparative Preparation Example 2 molasses 7 5 50.1 400

* Amount of binder added: Amount of binder solid content compared to dry weight of zinc dust

As shown in Table 2, in the case of using binder 4, binder 5, binder 6, and binder 7 having a predetermined sugar component composition as a binder when manufacturing metal-containing dust-based briquettes, compared to the case of using molasses as a binder, it was confirmed that at least two or more physical properties of briquettes, initial compressive strength, and late compressive strength were superior.

As described above, the present invention has been described through examples, but the present invention is not necessarily limited thereto, and various modifications are possible without departing from the scope and spirit of the present invention. Accordingly, the protection scope of the present invention should be construed to include all embodiments falling within the scope of the claims appended hereto.

Claims (10)

Based on the weight of saccharide solid content, glucose 72-87.1% by weight, glucose-based disaccharide having a polymerization degree of 2 4.5-15.5% by weight, glucose-based trisaccharide having a polymerization degree of 3 2.3-8.1% by weight and glucose-based polymerization degree 4-12 A binder for metal-containing dust-based briquettes containing 2.2 to 6.1% by weight of phosphorus oligosaccharides.
The method of claim 1, wherein the disaccharide is selected from maltose or isomaltose, the trisaccharide is selected from maltotriose, pannose or isomaltotriose, and the oligosaccharide is selected from malto-oligosaccharide or isomalto-oligosaccharide. Binder for jacket.
The binder for metal-containing dust-based briquettes according to claim 1, characterized in that the solids concentration is in the liquid phase of 50 to 80 Brix.
delete Metal-containing dust-based briquettes comprising metal-containing dust and a binder according to any one of claims 1 to 3 and having the form of a composition.
The metal-containing dust-based briquette according to claim 5, characterized in that it comprises 2 to 10 parts by weight of a binder based on 100 parts by weight of the metal-containing dust on a dry weight basis.
The metal-containing dust-based briquettes according to claim 5, characterized in that the metal content in the metal-containing dust is 50 to 99.99% by weight.
Preparing a mixture for briquette molding by mixing metal-containing dust, the binder of any one of claims 1 to 3, and water; and
A method for producing metal-containing dust-based briquettes comprising the step of producing a molding by compression molding the briquette molding mixture.
The method of claim 8, wherein the briquette molding mixture comprises 2 to 10 parts by weight of a binder based on 100 parts by weight of metal-containing dust based on dry weight.
The method of claim 8, wherein the moisture content of the briquette molding mixture is 5 to 20% by weight.