KR102502171B1 - Preparing Method for Functional grout and Functional grout of Prepare by the same, Reclamation Method thereof - Google Patents

Abstract

The present invention relates to a method for manufacturing functional grout which includes ferronickel slag fine powder to increase the functionality and durability of grout and facilitate work, functional grout manufactured thereby, and a reclamation method thereof. More specifically, the method comprises: a preparation step of preparing ferronickel slag; a distribution step of distributing a plurality of solid raw materials in quantitative quantities after the preparation step; an input step of adding an admixture to the solid raw material after the distribution step; a first stirring step of stirring the solid raw materials and the admixture after the input step; an addition step of adding additives to the solid raw material after the first stirring step; and a second stirring step of stirring the solid raw materials and additives after the addition step.

Description

Functional grout manufacturing method, functional grout produced thereby, and its embedding method {Preparing Method for Functional grout and Functional grout of Prepare by the same, Reclamation Method

The present invention relates to a method for manufacturing a functional grout that contains fine powder of ferronickel slag to improve the functionality and durability of the grout and to facilitate workability, a functional grout produced thereby, and a method for embedding the same.

Patent Document 001 contains 100 to 200 parts by weight of blast furnace slag fine powder and a hydrogen ion concentration (pH) of 12 or more and a calcium oxide content of 50% by weight or more and sulfate oxide based on 100 parts by weight of ferronickel slag fine powder. It contains 100 to 150 parts by weight of gypsum having a content of 15% by weight or more, and further includes cement to improve quick hardening and strength, wherein the cement is a group consisting of type 1 cement, type 3 cement, blast furnace slag cement and fly ash cement. Any one selected from or a technique formed from a mixture of two or more is proposed.

Patent Document 002 is a binder for concrete, which includes three components of ferronickel slag fine powder, blast furnace slag fine powder, and fly ash in addition to cement. At this time, the binder for concrete includes cement: ferronickel slag fine powder: blast furnace slag fine powder: fly ash, respectively. It is included in a weight ratio of 40~60 : 5~30 : 5~30 : 5~30, based on 100 parts by weight of cement, 1~10 parts by weight of ferronickel slag powder, 1~20 parts by weight of blast furnace slag powder, 0.1~10 parts by weight of gypsum 1 to 10 parts by weight of polymer, 0.1 to 10 parts by weight of fly ash, 0.1 to 8 parts by weight of silica fume, 0.5 to 5.0 parts by weight of fiber; 1 to 10 parts by weight of calcium alumina sulfite (CSA); Shrinkage reducing agent 0.5 ~ 2.0 parts by weight; 0.1 to 1.0 parts by weight of an antifoaming agent; Water reducing agent 0.1 ~ 0.5 parts by weight; and 1 to 5 parts by weight of porous aggregate processed with glass powder; and a technique of mixing the aggregate and water is proposed.

Patent Document 003 discloses a method for extracting useful resources from ferronickel slag, comprising the steps of preparing ferronickel slag; forming mixed slag by adding an additive containing CaO or MgO to the ferronickel slag; and melting the mixed slag to form a slag slurry, which is filtered and separated into a filtration solution and a filtration residue, wherein the slag slurry may be formed by dissolving the mixed slag using an acid, and having a pH of 0.5. The method of extracting useful resources from the ferronickel slag may include the steps of obtaining a magnesium chloride solution by removing impurities from the filtrate solution; and electrolyzing the magnesium chloride solution to obtain magnesium.

Patent Document 004 discloses a method for extracting useful resources from ferronickel slag, comprising the steps of preparing ferronickel slag; forming mixed slag by adding an additive containing CaO or MgO to the ferronickel slag; and melting the mixed slag to form a slag slurry, and filtering it to separate it into a filtration solution and a filtration residue.

KR 10-1638084 B1 (July 04, 2016) KR 10-2152603 B1 (September 01, 2020) KR 10-2012-0037305 A (April 19, 2012) KR 10-1162873 B1 (June 28, 2012)

The present invention relates to a method for manufacturing a functional grout that contains fine powder of ferronickel slag to improve the functionality and durability of the grout and to facilitate workability, a functional grout produced thereby, and a method for embedding the same.

In order to solve the problems of the prior invention, the present invention is a functional grout manufacturing method, a preparation step of preparing ferronickel slag 10 (S1100); After the preparation step (S1100), a distribution step (S1200) of quantitatively distributing a plurality of solid raw materials; After the dispensing step (S1200), an input step of injecting an admixture into the solid raw material (S1300); After the input step (S1300), a first stirring step (S1400) of stirring the solid raw material and the admixture; After the first stirring step (S1400), an addition step of adding an additive to the solid raw material (S1500); After the addition step (S1500), a second stirring step (S1600) of stirring the solid raw material and additives; It consists of a configuration that includes.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); Of the preparation step (S1100) in the invention consisting of, an extraction step (S1110) of extracting industrial by-products generated during nickel extraction; Before the crushing step (S1130), a first sorting step (S1120) of automatically sorting the iron 20 mixed with the industrial by-products; After the screening step, a crushing step (S1130) of crushing the ferronickel slag 10 separated from industrial by-products; is added.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); After the first sorting step (S1120), a recovery step (S1121) of recovering the sorted iron 20; After the recovery step (S1121), a collection step (S1122) of collecting iron 20 is added.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); After the crushing step (S1130) in the invention consisting of, a second sorting step (S1140) of magnetically sorting the iron 20 pulverized together with the ferronickel slag 10; After the second screening step (S1140), a filtration step (S1150) of filtering the ferronickel slag 10; is added.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); In the invention consisting of, the ferronickel slag 10 is formed with a powder degree of 3,000 ~ 4,000 cm2 / g; is added.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); In the invention consisting of, the solid raw material is formed of at least one of ferronickel slag 10, aggregate, silica sand, and lime; is added.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); In the invention consisting of, the admixture is formed of at least one of a swelling agent, an antifoaming agent, CSA (Calcium Sulfur Aluminate), a fluidizing agent, and a thickening agent; is added.

The present invention is an invention for a method for manufacturing a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); A second stirring step (S1600); In the invention consisting of, the additive is formed of one selected from general Portland cement, CAC (calcium aluminate composite), bentonite, and gypsum (CaSO 4 ); is added.

The present invention is an invention for a functional grout, and the preparation step (S1100) presented above; distribution step (S1200); Input step (S1300); A first stirring step (S1400); Addition step (S1500); The second stirring step (S1600); consists of a configuration comprising a functional grout manufactured by the manufacturing method of any one of claims 1 to 9 in the invention.

The present invention relates to a functional grout embedding method, and in the functional grout embedding method of claim 9, an excavation step of excavating the ground (S2100); After the excavation step (S2100), an insertion step (S2200) of inserting the wall reinforcement 40 into the excavation space 30; After the insertion step (S2200), a cover installation step (S2300) of installing a cover 920 on the top of the excavation space 30; After the cover installation step (S2300), a filling step (S2400) of penetrating the cover 920 and filling the functional grout (S2400).

The present invention can recycle industrial by-products by utilizing ferronickel slag, which is an industrial by-product.

The present invention is to reduce the contamination of the ground by mixing the environmentally friendly ferronickel slag.

The present invention is to improve workability by adding gypsum to ferronickel slag.

The present invention is capable of mixing ferronickel slag of good quality by magnetically separating iron mixed with ferronickel slag in industrial by-products.

The present invention can contribute to solidification and stabilization of the ground during grout filling as ferronickel slag is mixed.

1 is a flow chart of a functional grout manufacturing method of the present invention.
Figure 2 Figure 3 is a flow chart of the preparation step of the ferronickel slag of the present invention.
Figure 4 is an exemplary view of the magnetic device of the present invention.
5 is a cross-sectional view of a first magnetic separator of the present invention.
6 is a cross-sectional view showing a recovery device installed in the first magnetic separator of the present invention.
7 is a cross-sectional view of a second magnetic separator of the present invention.
8 is a cross-sectional view of the filtering device of the present invention.
Figure 9 is a cross-sectional view of the stirring device of the present invention.
10 to 11 are flow charts of the embedding method of the functional grout of the present invention.
12 is an exemplary view of the cover of the present invention.

Hereinafter, the most preferred embodiment of the present invention will be described in detail in order to explain the present invention in detail to the extent that those skilled in the art can easily practice the present invention.

Numbers cited in the examples below are not limited to the referenced subject and can be applied to all examples. An object that exhibits the same purpose and effect as the configuration presented in the embodiment corresponds to an equivalent replacement object. The high-level concept presented in the examples includes sub-concept objects that are not described.

(Example 1-1) According to the present invention, a functional grout manufacturing method includes a preparation step of preparing ferronickel slag 10 (S1100); After the preparation step (S1100), a distribution step (S1200) of quantitatively distributing a plurality of solid raw materials; After the dispensing step (S1200), an input step of injecting an admixture into the solid raw material (S1300); After the input step (S1300), a first stirring step (S1400) of stirring the solid raw material and the admixture; After the first stirring step (S1400), an addition step of adding an additive to the solid raw material (S1500); After the addition step (S1500), a second stirring step (S1600) of stirring the solid raw material and the additive; includes.

(Example 1-2) In the method for manufacturing a functional grout according to Example 1-1, the solid raw material is at least one of a type 1 cement binder, fine powder of ferronickel slag (10), aggregate, silica sand, and lime. What is formed; includes.

(Example 1-3) In Example 1-1, the functional grout manufacturing method of the present invention, wherein the admixture is formed of at least one of a swelling agent, an antifoaming agent, CSA (Calcium Sulfur Aluminate), a fluidizing agent, and a thickening agent; includes

(Example 1-4) In the method of manufacturing the functional grout of the present invention, in Example 1-1, the additive is formed of one selected from general Portland cement, CAC (calcium aluminate composite), bentonite, and gypsum (CaSO4); includes

The present invention relates to a method for manufacturing a functional grout, and specifically, the method for manufacturing a functional grout is formed of a grout in which ferronickel slag 10, an industrial by-product, is mixed, and has improved functionality and durability compared to general grout. Ferronickel slag (10) (Fe-Ni Slag) mixed in this functional grout manufacturing method is an alloy in which iron (20) (80%) and nickel (20%) are combined. 10) As an industrial by-product generated after extracting nickel from serpentine for production, about 30 tons of ferronickel slag 10 is normally generated when producing 1 ton of nickel. When such ferronickel slag 10 is mixed with grout, it contains environmentally friendly elements such as minimizing carbon dioxide emissions (about 1/17) and reducing impurity content in the production process, and can contribute to the promotion of solidification and stabilization of the ground. It is expected to play an important role in forming optimal mixing conditions. In addition, since it contains about 30% or more of MgO among the components, it is involved in long-term expansion, contributing to the long-term stability of the grout material for which non-shrinkage performance (adding an expansion agent to prevent shrinkage of the grout) is important. Accordingly, the grout of the present invention has improved functionality and durability compared to general cement.

Referring to FIG. 1, in the functional grout manufacturing method, a preparation step (S1100) of preparing the ferronickel slag 10 is formed, and the ferronickel slag 10 prepared in the preparation step (S1100) and a plurality of solid raw materials In the distribution step (S1200), it is distributed in a quantitative manner. At this time, the plurality of solid raw materials are formed of a type 1 cement binder, aggregate, silica sand, and lime and mixed with the ferronickel slag 10, and the silica sand is formed of No. 5 and No. 6, respectively. To explain this in detail, solid raw materials are based on 100% by weight of solid raw materials, 28 to 35% by weight of type 1 cement binder, 7 to 10% by weight of ferronickel slag (10) fine powder, 25 to 30% by weight of aggregate, 22 to 30% by weight of silica sand It is quantitatively distributed in the distribution step (S1200) to form 28% by weight and 10 to 15% by weight of lime. In this way, the plurality of solid raw materials quantitatively distributed in the distribution step (S1200) is an admixture added to the solid raw material in the input step (S1300), and the admixture is formed as a swelling agent, an antifoaming agent, CSA (Calcium Sulfur Aluminate), a fluidizing agent, and a thickener. . At this time, based on 100% by weight of grout, 90 to 98% by weight of solid raw material, 0.1 to 1% by weight of expanding agent, 0.03 to 0.10% by weight of antifoaming agent, 1.0 to 2.5% by weight of CSA (Calcium Sulfur Aluminate), and 0.1 to 0.5% by weight of glidant , It is formed with 0.1 to 0.5% by weight of a thickener. Then, mixed water is added to the solid raw material.

And after the admixture is added to the solid raw material, it is stirred in the first stirring step (S1400), and in the first stirring step (S1400), a plurality of solid raw materials are stirred by the stirring device 800 having blades. At this time, referring to FIG. 9, the stirring device 800 is formed in a double structure, and a through hole 921 is formed in the inner stirring box 810 to measure the powder degree of the solid raw material and the admixture passing through the through hole 921. can be adjusted

In addition, after the admixture is added to the solid raw material, additives formed of general Portland cement, CAC (calcium aluminate composite), bentonite, gypsum (CaSO4), etc. are added to increase the stabilization of the grout. At this time, gypsum can effectively increase workability and performance. In this way, the solid raw material to which the additive is added is formed by stirring in the second stirring step (S1600). After the additives are added to the solid raw material in the second stirring step (S1600), the stabilization of the grout can be increased by using the stirring device again.

Therefore, the functional grout manufacturing method of the present invention is characterized in that the ferronickel slag 10 is mixed to improve the functionality and durability of the grout.

(Example 2-1) The method for manufacturing a functional grout according to Example 1-1 includes, among the preparation steps (S1100), an extraction step (S1110) of extracting industrial by-products generated during nickel extraction; Before the crushing step (S1130), a first sorting step (S1120) of automatically sorting the iron 20 mixed with the industrial by-products; After the screening step, a crushing step (S1130) of crushing the ferronickel slag 10 separated from industrial by-products; includes.

(Example 2-2) In Example 2-1, the functional grout manufacturing method of the present invention includes that the ferronickel slag 10 is formed with a powder degree of 3,000 to 4,000 cm2/g.

(Example 2-3) The functional grout manufacturing method of the present invention, in Example 2-1, includes a moving rail 200 for moving industrial by-products during the first sorting step (S1120); A magnetic device 300 formed on the moving rail 200 and generating magnetic force by electric power; includes.

(Embodiment 2-4) The functional grout manufacturing method of the present invention, in Embodiment 2-3, is formed in the magnetic force device 300 and includes a control device 310 for controlling power.

(Example 2-5) The functional grout manufacturing method of the present invention is in Example 2-4, wherein the control device 310 cuts off power to the magnetic device 300 at the lower end of the moving rail 200. including;

The present invention relates to the preparation step (S1100), specifically, the preparation step (S1100) is to extract industrial by-products generated during nickel extraction and process them into fine powder. Referring to FIGS. 2 to 3, in this preparation step (S1100), as described above, ferronickel slag 10, which is an industrial by-product, is extracted from serpentine to produce ferronickel used in stainless steel production. An extraction step (S1110) is formed. And the ferronickel slag 10 extracted in the extraction step (S1110) is mixed with iron (20) and nickel, and a first screening step (S1120) of removing iron (20) is formed in order to utilize pure nickel. do. In the first screening step (S1120), iron 20 having a large size must be screened in order to screen iron 20 that has not been mixed with industrial by-products and pulverized, so magnetic force must be strong. Referring to FIG. 4, in the first sorting step (S1120), when the industrial by-products are moved as the moving rail 200 for moving the industrial by-products and the magnetic device 300 generating magnetic force on the moving rails 200 are formed. (20) is attached to the magnetic device (300) and the ferronickel slag (10) moves. In addition, the magnetic device 300 is an electromagnetic force generating device that generates magnetic force by electric power, and power supply is controlled by the control device 310. At this time, the control device 310 supplies power to the top of the moving rail 200, and as the iron 20 moves along with the ferronickel slag 10, the iron 20 is attached and the ferronickel slag 10 It moves to the grinder (100). In addition, the control device 310 cuts off power to the lower part of the moving rail 200 so that the iron 20 descends to the lower part and stores the iron 20 separately.

In addition, since the ferronickel slag 10 from which iron 20 is separated is formed in various sizes, it is difficult to use it as a raw material for grout. Accordingly, the ferronickel slag 10 extracted in the extraction step (S1110) is pulverized in the pulverization step (S1130) to form a powder of 3,000 to 4,000 cm2/g.

Therefore, the preparation step (S1100) of the present invention is characterized by extracting ferronickel industrial by-products and then pulverizing the ferronickel slag 10 into fine powder.

(Example 2-6) The functional grout manufacturing method of the present invention, in Example 2-1, includes a crusher 100 for crushing ferronickel slag 10 with pressure during the crushing step (S1130). .

(Example 2-7) In the method for manufacturing the functional grout of the present invention in Example 2-6, the grinder 100 includes a case 110 in which ferronickel slag 10 is accommodated; It is formed inside the case 110, and crushing device 120 for crushing the ferronickel slag 10 with pressure; includes.

(Example 2-8) In the method of manufacturing the functional grout of the present invention in Example 2-7, the crushing device 120 crushes ferronickel slag 10 as a plurality of rollers rotate. do.

The present invention relates to the crushing step (S1130). Referring to FIG. 5, in the crushing step (S1130), a crusher 100 is formed to crush the ferronickel slag 10 to form a fine powder, and the crusher 100 applies pressure to ferronickel industrial by-products as ferronickel slag (10) is crushed. In the crusher 100, a case 110 accommodating the ferronickel slag 10 is formed, and a crushing device 120 is formed inside the case 110 to crush the ferronickel slag 10 with pressure. . The crushing device 120 crushes the ferronickel slag 10 by means of a pressure-moving cylinder or pulverizes the ferronickel slag 10 as a plurality of rollers are formed to face each other and the rollers rotate.

Therefore, the preparation step (S1100) of the present invention is characterized by extracting ferronickel industrial by-products and then pulverizing the ferronickel slag 10 into fine powder.

(Example 3-1) The functional grout manufacturing method of the present invention is in Example 2-1, after the crushing step (S1130), magnetically sorting the iron 20 pulverized together with the ferronickel slag 10 a second screening step (S1140); After the second screening step (S1140), a filtration step (S1150) of filtering the ferronickel slag 10; includes.

(Example 3-2) The functional grout manufacturing method according to the present invention is in Example 3-1, in the second sorting step (S1140), the first magnetic separator 400 for magnetically sorting iron 20; It is formed at the end of the first magnetic separator 400, and the second magnetic separator 500 to which the descending iron 20 is attached; includes.

(Example 3-3) In Example 3-2, the functional grout manufacturing method of the present invention is formed in the first magnetic separator 400, and pulverized ferronickel slag 10 and iron 20 are introduced. an inflow chamber 410; It is formed in the inlet chamber 410, and the magnetic blade 420 rotates by equal force inside; includes.

(Example 3-4) The functional grout manufacturing method of the present invention, in Example 3-3, includes a magnetic plate 421 formed on the magnetic blade 420 and generating magnetic force by current.

(Example 3-5) The functional grout manufacturing method of the present invention includes, in Example 3-1, that the magnetic force plate 421 is formed in a spiral shape.

(Example 3-6) The functional grout manufacturing method of the present invention is the ferronickel slag formed in the second magnetic separator 500 and sorted in the first magnetic separator 400 in Example 3-2 ( 10) an input hopper 510 into which fine powder is input; It is formed on both sides of the input hopper 510 and includes a magnet member 520 to which the descending iron 20 is attached.

(Example 3-7) The functional grout manufacturing method of the present invention is in Example 3-6, which is formed at the top of the charging hopper 510, and vibrates the fine powder of ferronickel slag 10 and iron 20. Vibration device 530 to generate; includes.

The present invention relates to the second sorting step (S1140), and specifically, the second sorting step (S1140) is to magnetically sort iron 20 mixed with industrial by-products. In this second sorting step (S1140), iron 20 mixed with industrial by-products is sorted by magnetic force, and small units of iron 20 pulverized together with ferronickel slag 10 are magnetically sorted. At this time, the second sorting step (S1140) is to sort out the fine-sized iron 20 generated as the ferronickel slag 10 is pulverized into fine powder. At this time, the iron 20 is sorted by the first magnetic separator 400, and the first magnetic separator 400, referring to FIG. 5, ferronickel slag 10 pulverized in the crushing step (S1130) fine powder and an inlet chamber 410 into which iron 20 of a fine size is introduced, and the inlet chamber 410 is formed in a cylindrical shape to move fine powder of ferronickel slag 10. A magnetic blade 420 is formed inside the inflow chamber 410, and a magnetic plate 421 formed in a spiral shape is formed on the magnetic blade 420. In addition, the end of the magnetic blade 420 is connected, and the motor 540 formed outside the inlet chamber 410 is formed with a current supply device 550 to supply current to the magnetic blade 420. As a result, the magnetic blade 420 generates magnetic force, and the fine powder of ferronickel slag 10 is moved by the spiral magnetic plate 421, and the fine iron 20 is attached to the magnetic plate 421 and the magnetic blade 420. attached

In addition, the fine powder of ferronickel slag 10 discharged from the inlet chamber 410 is introduced to the top of the second magnetic separator 500, and the second magnetic separator 500, referring to FIG. 7, ferronickel slag ( 10) The input hopper 510 into which the fine powder and the iron 20 are input, and the magnet member formed inside the input hopper 510 and formed on both sides of the input hopper 510 so that the descending iron 20 is attached. (520) is formed. The magnet member 520 is formed of an electromagnet to which the iron 20 is attached when current is supplied, and a plurality of magnet members 520 are formed at predetermined intervals so that the descending iron 20 is effectively attached.

In addition, at the upper end of the input hopper 510, a vibration device 530 is formed of a mesh network to generate vibration, and the mesh network has various sizes so that the fine powder of ferronickel slag 10 and iron 20 pass through smoothly. is formed In this way, the vibrator 530 generates vibration so that the fine powder of ferronickel slag 10 and iron 20 do not descend in a lumped state, and inside the input hopper 510, the fine powder of ferronickel slag 10 and iron ( As the iron 20 is scattered and descends, the iron 20 is easily attached to the magnet member 520.

(Example 3-8) The functional grout manufacturing method of the present invention is in Example 3-1, in the filtering step (S1150), a filtering device 600 for filtering ferronickel slag 10 into various sizes; include

(Example 3-9) The functional grout manufacturing method of the present invention, in Example 3-8, includes a plurality of filter plates 610 formed inside the filtering device 600 and having different perforated holes; includes

The present invention relates to the filtration step (S1150), and specifically, the filtration step (S1150) is to filter the ferronickel slag 10 into a fine powder and remove foreign substances at the same time. In this filtration step (S1150), referring to FIG. 8, a filtering device 600 is formed to generate the ferronickel slag 10 into a uniform fine powder, and the filtering device 600 is formed with a plurality of filter plates 610 As a result, the ferronickel slag 10 is formed into a uniformly sized powder. At this time, the ferronickel slag 10 that has not been filtered by the filter plate 610 is pulverized and filtered again in the pulverization step (S1130), thereby improving the quality of the grout.

(Example 4-1) The functional grout manufacturing method of the present invention, in Example 1-1, includes a recovery step (S1121) of recovering the sorted iron 20 after the second sorting step (S1140); After the recovery step (S1121), a collection step (S1122) of collecting iron 20;

(Example 4-2) The functional grout manufacturing method of the present invention is in Example 4-1, during the recovery step (S1121), it is formed at the lower end of the first magnetic separator 400 to recover iron 20. It includes; a recovery device 700 that does.

(Example 4-3) The functional grout manufacturing method according to the present invention is in Example 4-2, wherein the recovery device 700 is formed of a rail that moves the iron 20 in one direction.

The present invention relates to the recovery step (S1121), and specifically, the recovery step (S1121) is to recover the iron 20 attached to the first magnetic separator 400 after the ferronickel slag 10 fine powder is moved. In this recovery step (S1121), the recovery device 700 formed at the lower end of the first magnetic separator 400 is formed, and the recovery device 700, referring to FIG. After cutting off the current to the magnetic blade 420, the descending iron 20 is recovered. In addition, in the inlet chamber 410, a supply device for supplying wind from the upper part of the inlet chamber 410 is formed to smoothly transfer the iron 20 to the lower end. Accordingly, the magnetic blade 420 rotates, the iron 20 attached to the magnetic plate 421 is separated, and the remaining iron 20 is supplied to the recovery device 700. The collecting device 700 is formed of a rail and moves the iron 20 in one direction, and the moved iron 20 is collected in the collecting case 110 in a collecting step S1122.

(Example 5-1) The functional grout of the present invention includes the functional grout in Example 5-1, prepared by any one of the manufacturing methods of Examples 1-1 to 4-1.

The present invention relates to a functional grout, and specifically, the functional grout has improved functionality and durability as the environmentally friendly ferronickel slag 10 is mixed. This functional grout is mixed with the ferronickel slag 10 to improve corrosion resistance by 30% or more compared to general cement, and also greatly improves durability when molding mortar and paste. And it contributes significantly to solidification and stabilization of the ground after grout molding.

As such, the functional grout prepared by mixing the ferronickel slag 10 was subjected to performance tests in various examples.

<Example 1>

The measurement of the flow time of functional grout is carried out according to KS F 4044, and it is to analyze the workable time by measuring the time until the flowing sample first breaks. As a result of the test, it was confirmed that as the ferronickel slag content increased, the condensation action by cement decreased, and the flow time involved in workability was appropriately lowered. However, it was confirmed that the efficiency was delayed when the slag content was 20% or more, and the effect according to the input amount was not shown. At this time, the test result of the fall time is shown as [Table 1].

<Example 2>

The flow test of functional grout is carried out according to KS F 4044 by measuring the flow chart of mixed materials to determine the workability difficulty of grout. As a result of the test, it was confirmed that as the mixing ratio of slag increased, the amount of cement decreased and the initial setting action was reduced, resulting in better flowability. However, when the slag content was 20% or more, it was confirmed that the flow increase rate was somewhat lowered. At this time, the flow test test results are shown in [Table 2].

<Example 3>

The compressive strength of the functional grout was tested to determine the degree of load that it could withstand without being destroyed per unit area. This is to analyze the mechanical properties to determine the stiffness support of the grout in the ground, and was conducted according to KS F 4044. As a result of the analysis after 28 days, which is the general standard age, the compressive strength generally increased due to the incorporation of slag, and showed a continuous upward curve up to a maximum content of 20%. Due to the latent hydraulic properties of ferronickel slag, it was found that the strength was lower than that of general strength at the initial age, but after 28 days, the hardening speed gradually progressed and it was confirmed that improved mechanical properties were expressed than those of general series. As the age increases, these characteristics become more evident. At this time, the compressive strength (28 days) test results are shown in [Table 3].

<Example 4>

The expansion height of the functional grout is a test to determine the expansibility of the grout in the ground, and it measures the ratio of the increased volume after 20 hours to the initial volume and was measured according to KS F 4044. As a result of the test, it was confirmed that the content of ferronickel slag took the form of a height lowering to 20%, and then stagnant. This is analyzed to be due to the effect of reducing the change in its volume due to the decrease in the initial chemical reaction. At this time, the test results of the expansion height are shown in [Table 4].

<Example 5>

The setting time of functional grout is measured by measuring the time when the binder of the grout reacts chemically with water, and it is indicated by measuring initial and final results using a lead meter, and follows the standard of KS F 4044. This means that if the initial setting time is short, the process required for the work cannot be performed, and if the closing time is long, it interferes with the recovery of stability of the ground. In the general series, it was confirmed that supersetting action appeared quickly due to the congealing chemical action of cement and water. In the series containing slag, it was confirmed that the initial setting time gradually appeared within a certain standard as the setting action gradually decreased due to the decrease in cement. At a slag content of 20% or more, it was confirmed that an appropriate distribution was formed within 6 hours or more for initial setting and 10 hours or less for termination. At this time, the test results of the setting time are shown in [Table 5].

<Example 6>

The bleeding rate of functional grout is a phenomenon in which the grouting material with a light specific gravity rises to the surface and separates the material. If the bleeding rate is high, the surface strength and adhesion are weakened, which hinders the expression of overall physical properties. In order to measure this resistance, the bleeding rate is measured, and the value is calculated by measuring the ratio of the bleeding volume to the total volume of the sample according to the KS F 2433 standard. As a result of the test, although not in direct proportion, it was found that the bleeding rate was greatly reduced by containing the slag, and it was confirmed that the most efficient mixing rate was 20%. At this time, the test results of the bleeding rate are shown in [Table 6].

<Example 7>

The water permeability of functional grout is a test conducted to evaluate the water permeability resistance of the grout in the ground. It is conducted in accordance with KS F 4926, and the weight is measured by applying water pressure to a specified test specimen. The weight of the general specimen before applying water pressure is subtracted. Calculations are made with values. As a result of the test, it was found that water permeability resistance increased by incorporating slag. This may have various causes such as particle size and long-term expansibility, and it is highly likely that the particle size structure has been formed more densely due to the long-term expansibility of ferronickel slag. The best water permeability was shown at the water content of 20 to 25%. At this time, the test results of the bleeding rate are shown in [Table 7].

<Example 8>

In general, the chloride-containing ground of functional grout has poor basic physical properties and has a high probability of corrosion when constructing a structure, so it is desirable to reduce chloride as much as possible. The chloride amount test conducted in accordance with KS F 4044 calculates the amount of chloride per unit area by pulverizing the collected sample, adding silver nitrate solution, and measuring the volume according to the prescribed procedure. As a result of the test, both the general series and the slag-containing series show stable amounts of chloride, indicating that there is no salt damage due to the slag containment. At this time, the test results of the chloride amount are shown in [Table 8].

<Example 9>

If the strength of functional grout is reduced by chemicals, the physical and mechanical properties of the foundation ground can be reduced at once. Therefore, the chemical resistance was confirmed by measuring the rate of decrease in compressive strength due to sulfate. It is measured according to ASTM C 1012, and the compressive strength construction body is immersed in a sulfuric acid solution and the strength is measured at the age of 28 days, and the ratio of the reduced compressive strength compared to the general specimen is measured. The chemical resistance was slightly improved due to the inclusion of slag, and a good strength relative ratio of 80% or more was shown at a slag content of 15% or more, indicating that the chemical resistance was enhanced due to the inclusion of slag. At this time, the test results of the compressive strength ratio are shown in [Table 9].

<Example 10>

The rate of change in the length of the grout material of the functional grout can cause sudden shrinkage during the initial curing period due to the influence of the binder. This is to confirm the resistance to this. The test was conducted according to As a result of the test, it can be confirmed that the drying shrinkage rate gradually decreased in the series containing ferronickel slag due to the reduction of the initial condensation action, and the reduction rate was gently flattened around the 20-25% content. At this time, the test results of the length change rate are shown in [Table 10].

(Example 6-1) In the embedding method of the functional grout of the present invention, in Example 5-1, in the embedding method of the functional grout of Example 5-1, the excavation step of excavating the ground (S2100); After the excavation step (S2100), an insertion step (S2200) of inserting the wall reinforcement 40 into the excavation space 30; After the insertion step (S2200), a cover installation step (S2300) of installing a cover 920 on the top of the excavation space 30; After the cover installation step (S2300), a filling step (S2400) of filling the functional grout through the cover 920;

(Example 6-2) In the present invention, the embedding method of the functional grout is in Example 6-1, and before the insertion step (S2200), the reinforcing bars 40 are placed so that the reinforcing bars are crossed vertically and horizontally. It includes; step (S2110).

(Example 6-3) In the embodiment 6-1, the functional grout embedding method of the present invention is a curing step of curing the functional grout by generating heat in the cover 920 after the filling step (S2400). (S2410);

(Example 6-4) The embedding method of the functional grout of the present invention includes, in Example 6-1, a replenishment step (S2420) of replenishing the functional grout with high pressure during the curing step (S2410).

(Embodiment 6-5) In the embodiment 6-1, the embedding method of the functional grout of the present invention includes, during the filling step (S2400), a spray nozzle 910 for injecting the functional grout; It is connected to the injection nozzle 910, and a pressure pump for adjusting the pressure; includes.

(Example 6-6) In the embodiment 6-5, the functional grout embedding method of the present invention includes a through hole 921 formed in the cover 920 and through which a spray nozzle 910 passes; A heating device 922 formed inside the cover 920 and generating heat by current.

(Example 6-7) In the embedding method of the functional grout of the present invention, in Example 6-6, the coupling protrusions protrude from both sides of the cover 920 in a stepped manner and are combined with the adjacent covers 920. (923);

The present invention relates to a functional grout embedding method, and specifically, the functional grout embedding method is constructed in the ground to fix reinforcing bars by excavating the ground. In the embedding method of this functional grout, after excavating the ground in the excavation step (S2100) to form an underground retaining wall at a construction site, the wall reinforcement 40 formed by crossing vertical and horizontal reinforcement bars is inserted (S2200 ) is formed. At this time, in the reinforcement step (S2110), the vertical reinforcement and the horizontal reinforcement are placed to cross, and the wall reinforcement 40 is assembled on the ground and then inserted into the excavation space 30 formed by excavating the ground.

In addition, a cover in which a cover 920 is installed on the top of the excavation space 30 in order to prevent foreign substances from entering the excavation space 30 into which the wall reinforcement 40 is inserted and to adjust the temperature of the excavation space 30. An installation step (S2300) is formed. The excavation space 30 is formed with a width at which the cover thickness is formed after the wall reinforcement 40 is inserted, and the width of the cover 920 is preferably formed larger than the excavation space 30. At this time, a plurality of the cover 920 is coupled to each other to be installed on the upper part of the excavation space 30, and the cover 920 is formed in plurality and coupled to each other to connect the upper part of the excavation space 30. The cover 920 is formed with coupling protrusions 923 protruding from both sides, and the coupling protrusion 923 has a step so that one side protrudes from the top and the other side protrudes from the bottom, so that the covers 920 adjacent to each other are seated. It can be. In addition, a through hole 921 through which a spray nozzle 910 for filling the functional grout passes is formed in the cover 920, and a plurality of through holes 921 are formed at equal intervals so that the entire excavation space 30 is functional. Allow the grout to fill. In addition, the cover 920 has a heating device 922 formed therein, and the heating device 922 generates heat by current as it is formed of a hot wire or the like. This is to prevent uneven curing of the grout due to the occurrence of a temperature difference between the lower part and the upper part of the excavation space 30 .

In this way, when the cover 920 is installed in the excavation space 30, the injection nozzle 910 is installed to penetrate the cover 920, and then the functional grout is filled with low pressure in the filling step (S2400). Then, when a certain amount of functional grout is filled, a curing step (S2410) of generating heat in the cover 920 is formed, and a replenishment step (S2420) of supplementing the functional grout is formed during the curing step (S2410). In the replenishment step (S2420), as the functional grout is filled with high pressure, voids such as bubbles are prevented from being generated in the functional grout, and the entire excavation space 30 is effectively filled with the functional grout. When the functional grout is filled, the cover 920 is removed.

S1100: Preparation step S1110: Extraction step
S1120: First screening step S1121: Recovery step
S1122: Collecting step S1130: Grinding step
S1140: Second screening step S1150: Filtering step
S1200: distribution step S1300: input step
S1400: First stirring step S1500: Addition step
S1600: Second stirring step
S2100: excavation step S2110: reinforcement step
S2200: Insertion step S2300: Cover installation step
S2400: Filling step S2410: Curing step
S2420: replenishment step
10: ferronickel slag 20: iron
30: excavation space 40: wall reinforcement
100: grinder 110: case
120: grinding device 200: moving rail
300: magnetic device 310: control device
400: first magnetic separator 410: inflow chamber
420: magnetic blade 421: magnetic plate
500: second magnetic separator 510: input hopper
520: magnet member 530: vibration device
540: motor 550: current supply
600: filter device 610: filter plate
700: recovery device 710: collection box
800: stirring device 810: first stirring box
910: injection nozzle 920: cover
921: through hole 922: heating device
923: coupling protrusion

Claims (10)

A preparation step of preparing ferronickel slag 10 (S1100);
After the preparation step (S1100), a distribution step (S1200) of quantitatively distributing a plurality of solid raw materials;
After the dispensing step (S1200), an input step of injecting an admixture into the solid raw material (S1300);
After the input step (S1300), a first stirring step (S1400) of stirring the solid raw material and the admixture;
After the first stirring step (S1400), an addition step of adding an additive to the solid raw material (S1500);
After the addition step (S1500), a second stirring step (S1600) of stirring the solid raw material and the additive;
Of the preparation step (S1100), an extraction step (S1110) of extracting industrial by-products generated during nickel extraction;
A first sorting step (S1120) of sorting iron 20 mixed with industrial by-products by itself;
After the first sorting step (S1120), a grinding step (S1130) of grinding the ferronickel slag 10 separated from industrial by-products; includes,
After the crushing step (S1130), a second sorting step (S1140) of sorting the pulverized iron 20 together with the ferronickel slag 10 by magnetic force;
After the second screening step (S1140), a filtration step (S1150) of filtering the ferronickel slag 10;
During the second sorting step (S1140), the first magnetic sorter 400 magnetically sorts the iron 20;
It is formed at the end of the first magnetic separator 400, and the second magnetic separator 500 to which the descending iron 20 is attached; includes,
an inlet chamber 410 formed in the first magnetic separator 400 and into which pulverized ferronickel slag 10 and iron 20 are introduced; A magnetic blade 420 formed in the inlet chamber 410 and rotated by power inside; includes,
A magnetic plate 421 formed on the magnetic blade 420 and generating magnetic force by current; includes,
The magnetic force plate 421 is formed in a spiral shape; includes,
an input hopper 510 formed in the second magnetic separator 500 and into which fine powder of ferronickel slag 10 selected in the first magnetic separator 400 is put; A magnet member 520 formed on both sides of the inside of the input hopper 510 and to which the descending iron 20 is attached,
Functional grout manufacturing method comprising: a vibration device 530 formed of a mesh network at the top of the input hopper 510 and generating vibrations in the fine powder of ferronickel slag 10 and iron 20.
delete The method of claim 1,
After the first sorting step (S1120), a recovering step (S1121) of recovering the sorted iron 20;
After the recovery step (S1121), a collecting step (S1122) of collecting iron 20; functional grout manufacturing method comprising a.
delete The method of claim 1,
The ferronickel slag 10 is formed in a powder degree of 3,000 ~ 4,000 cm2 / g; functional grout manufacturing method comprising a.
The method of claim 1,
The solid raw material is formed of at least one of ferronickel slag 10, aggregate, silica sand, and lime; functional grout manufacturing method comprising a.
The method of claim 1,
The functional grout manufacturing method comprising: forming the admixture with at least one of an expanding agent, an antifoaming agent, CSA (Calcium Sulfur Aluminate), a fluidizing agent, and a thickening agent.
The method of claim 1,
The additive is formed of one selected from general Portland cement, CAC (calcium aluminate composite), bentonite, and gypsum (CaSO4); functional grout manufacturing method comprising a.
In the functional grout,
Claims 1, 3, 5 to 8 functional grout produced by any one of manufacturing methods.
In the embedding method of the functional grout of claim 9,
An excavation step of excavating the ground (S2100);
After the excavation step (S2100), an insertion step (S2200) of inserting the wall reinforcement 40 into the excavation space 30;
After the insertion step (S2200), a cover installation step (S2300) of installing a cover 920 on the top of the excavation space 30;
After the cover installation step (S2300), a filling step (S2400) of penetrating the cover 920 and filling the functional grout;

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