KR20200034116A - Manufacturing Method and Apparatus for Powder Activator Admixture including Ferro-nickel Slag Fine Powder - Google Patents

Abstract

The present invention relates to a method and an apparatus for preparing a powder activation admixture including ferronickel slag fine powder. The method of the present invention comprises: a first grinding step of primarily grinding a raw material; a second grinding step of secondarily grinding fine powder ground and divided in the first grinding step; a third grinding step of thirdly grinding the fine powder ground and divided in the second grinding step; and a step of generating mixed fine powder of a third brain by mixing the fine powder of first and second brains divided by being completed with the second and second grinding steps. According to the present invention, specialized performance and differentiated specialized performance of a raw material are improved, and economic feasibility (cost-effectiveness) is enhanced in an aspect of developing an alternative cement admixture, and an aspect of verifying applicability for mass-utilization and distribution is excellent to maximize the utilization of ferronickel slag, thereby increasing a recycling rate of the ferronickel slag and minimizing disposal costs of the ferronickel slag.

Description

Manufacturing Method and Apparatus for Powder Activator Admixture including Ferro-nickel Slag Fine Powder

The present invention relates to a method and apparatus for manufacturing a powder-activated admixture comprising a fine powder of ferronickel slag, and more specifically, a ferronickel slag fine powder capable of reflecting the maximized characteristics of the ferronic slag in the powder-activated admixture produced finally. It relates to a method and apparatus for producing a powder-activated admixture comprising a.

The main raw material of stainless steel, ferronickel, is produced by smelting in an electric furnace or a rotary kiln, and the slag generated at this time is called ferronickel slag. It is generally known that about 30 tons of slag are generated per ton of nickel, and the domestic Busan production amount is about 1 million tons per year.

The ferronickel slag is observed as uneven granules with a slight blue color, and when the particles are large, the particle surface represents a porous surface, and is a crushed irregular particle having a size of 5 mm or more in diameter similar to sand. The main chemical components of ferronickel slag include silicon dioxide (SiO _2. ) And magnesium oxide (MgO). Among the chemical components of ferronickel slag, the component ratios of double silica (SiO ₂ ), alumina (Al ₂ O ₃ ), and iron oxide (Fe ₂ O ₃ ) are 45 to 54%, 28.8 to 35.0%, and 5.6 to 7.4%, respectively. It occupies the largest amount.

As a byproduct, ferronickel slag is recycled in a variety of ways, such as raw materials for cement production, materials for civil engineering, fine aggregates for concrete, aggregates for runways, and serpentine substitutes in developed countries such as Japan and Canada, but is still lacking in technology and lack of awareness in Korea. Because of this, it is being used incompletely.

On the other hand, the technology used in Korea has been approached from the macroscopic and conceptual aspect of simply mixing ferronickel slag with ordinary cement, so focusing on how to mix ratios in mixing cement and ferronickel slag. Is hitting.

In the case of cement mixed with ferronickel slag, it is possible to maximize one of the characteristics depending on the mixing ratio. On the other hand, despite the other characteristics falling or having a problem that it is difficult to bulk-up due to the caustic ratio, it solves the problem. In order to achieve this, it is currently only necessary to adjust the mixing ratio of cement and ferronickel slag.

Hereinafter, a method for maximizing the material properties of the ferronickel slag mixed with cement will be proposed.

The present invention proposes a strength expression mechanism using a different approach to the conventional ferronickel slag powder and a method for producing a powder-activated admixture containing ferronickel slag fine powder capable of improving mechanical performance, acid resistance, salt resistance and caustic ratio, and The purpose is to provide a device.

In addition, the specific performance (salt resistance, acid resistance, low heat generation performance, etc.) of the fine powder of ferronickel slag is compared with that of existing cement, and the specialized performance (reduction of heavy metals) and fine performance (slow problem of initial hydration) are quantitatively quantified. There is another purpose to increase its usefulness by presenting.

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

According to an aspect of the present invention for achieving the objects and other features of the present invention, the first crushing step of first crushing the raw material; A second grinding step of secondly grinding the fine powder classified by grinding in the first grinding step; A third crushing step of pulverizing finely divided fine powder crushed in the second crushing step; And mixing at least two or more fine powders of the first brain classified through the second grinding step and fine powders of the second brain classified through the third grinding step, to obtain a third brain different from the first and second brains. A method of making a powder activated admixture comprising ferronickel slag fine powder comprising the step of generating a mixed fine powder is provided.

In the present invention, it is preferable that each of the first to third grinding steps is characterized in that at least one grinding aid among Glycolic-based, Amine-based and SAS-based grinding aids is added.

In the present invention, it is preferable that the pulverization aid contains ferronickel slag fine powder, characterized in that 0.03 to 0.05% of the weight to be crushed is used.

In the present invention, the grinding aid added in the first grinding step is preferably characterized in that DEG: TIPA: PCE has a composition ratio of 35:45:20.

In the present invention, the grinding aid added in the second grinding step preferably includes ferronickel slag fine powder, characterized in that TDS: PCE has a composition ratio of 50:50.

In the present invention, the grinding aid added in the third grinding step has a composition ratio of EDF: PCE of 60:40 or EDF: PCE: PA of 55:35:10 or EDF: PCE: C1 of 55:35:10. It is preferable to feature.

In the present invention, the first grinding step is an impact friction method, it is preferable to drive at a rotor linear speed of 90 ~ 110m / sec or more to form a powder having a grinding particle size of 10㎛ or less.

In the present invention, a first classification step of classifying the fine powder generated after the first grinding step; And it is preferable to further include a first and second powder recovery step for recovering the fine powder of 5,000 brain and 10,000 brain, respectively, after the first classification step.

In the present invention, the second grinding step is a high-pressure collision method, it is preferable to have a high pressure of 6.5 ~ 7.5㎏ / ㎠ and characterized in that it has a nozzle speed of 1,100 ~ 1,500m / cec.

In the present invention, the second classification step of classifying the fine powder generated after the second grinding step; And a third and fourth powder recovery step for recovering 20,000 brains and fine powders of 20,000 brains or less after the second classification step, respectively.

In the present invention, the third grinding step is a high-pressure collision method, it is preferable to have a high pressure of 6.5 ~ 7.5㎏ / ㎠ and a nozzle speed of 1,100 ~ 1,500m / cec.

In the present invention, it is preferable to further include a fifth and sixth powder recovery steps for recovering 30,000 brains and 30,000 brains or less fine powders, respectively, after the third classification step.

In the present invention, the step of generating the mixed fine powder is preferably characterized by mixing the fine powder of 20,000 brains recovered in the third powder recovery step and the fine powder of 30,000 brains recovered in the fifth powder recovery step.

According to another aspect of the present invention for achieving the objects and other features of the present invention, the first crushing device for pulverizing the raw material first; A first classifying device for classifying fine powder discharged from the first grinding device; First and second powder recovery devices for recovering fine powder classified in the first classification device; A first discharge valve disposed under the first classification device and configured to discharge fine powder having a predetermined size or more; A second grinding device for secondly grinding the fine powder discharged from the first discharge valve; A second classification device for classifying fine powder discharged from the second crushing device; A third and fourth powder recovery apparatus for recovering fine powder classified in the second classification apparatus; A second discharge valve disposed under the second classification device and for discharging fine powder having a predetermined size or more; A third grinding device for pulverizing the fine powder discharged from the second discharge valve thirdly; A fifth and sixth powder recovery apparatus for recovering fine powder discharged from the third grinding apparatus; And a mixed powder recovery device for mixing the fine powder recovered from the third and fifth powder recovery devices to produce a mixed powder, and a powder activated admixture comprising a ferronickel slag fine powder.

In the present invention, the first grinding device is an impact friction method, and is driven at a rotor linear speed of 90 to 110 m / sec or more to form a powder having a grinding particle size of 10 μm or less, and the second and third grinding devices are high pressure. It is a collision method, and is preferably characterized by having a high pressure of 6.5 to 7.5 kg / cm 2 and a nozzle speed of 1,100 to 1,500 m / sec.

In the present invention, it is preferable that the third powder recovery device recovers 20,000 brain fine powders, and the fifth powder recovery device recovers 30,000 brain fine powders.

In the present invention, the first to third pulverizing apparatus is preferably characterized in that at least one pulverization aid is added from among the pulverization aids of Glycolic, Amine and SAS based during the pulverization operation.

In the present invention, it is preferable to produce by mixing the mixed fine powder and cement at 10:90.

The method and apparatus for manufacturing a powder-activated admixture comprising a fine powder of ferronickel slag according to the present invention have the following effects.

Since the present invention is excellent in terms of applicability for dispersal replacement admixtures, specialization of raw materials, specialization of differentiation, improvement of economic efficiency (cost ratio), and distribution of mass utilization, utilization of ferronickel slag By maximizing, it is possible to increase the recycling rate of ferronickel slag and at the same time minimize the waste disposal cost of ferronickel slag.

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

1 is a schematic diagram for explaining a system for manufacturing a powder-activated admixture comprising a fine powder of ferronickel slag according to an embodiment of the present invention.
Figure 2a to 2d is a graph for explaining the powder level according to the addition of a pulverization aid of Glycolic.
Figure 3a to 3d is a graph for explaining the powder according to the addition of the amine-based grinding aid.
Figures 4a to 4d is a graph for explaining the powder according to the addition of the SAS grinding aid.

Since the description of the present invention is only an example for structural or functional description, the scope of the present invention should not be interpreted as being limited by the examples described in the text. That is, since the embodiments can be variously changed and have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing technical ideas. In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such an effect, and the scope of the present invention should not be understood as being limited thereby.

Meanwhile, the meaning of terms described in the present application should be understood as follows.

Terms such as "first" and "second" are for distinguishing one component from other components, and the scope of rights should not be limited by these terms. For example, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" to another component, it may be understood that other components may exist directly in the middle, although other components may be directly connected. On the other hand, when a component is said to be "directly connected" to another component, it should be understood that no other component exists in the middle. On the other hand, other expressions describing the relationship between the components, that is, "between" and "immediately between" or "adjacent to" and "directly neighboring to" should be interpreted similarly.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as “comprises” or “have” are used features, numbers, steps, actions, components, parts or the like. It is to be understood that a combination is intended to be present, and should not be understood as pre-excluding the existence or addition possibilities of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

In each step, the identification code (for example, a, b, c, etc.) is used for convenience of explanation. The identification code does not describe the order of each step, and each step clearly identifies a specific order in context. Unless stated, it may occur in a different order than specified. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

All terms used herein have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains, unless otherwise defined. The terms defined in the commonly used dictionary should be interpreted as being consistent with the meanings in the context of related technologies, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present application.

1 is a schematic view for explaining a system for manufacturing a powder-activated admixture comprising ferronickel slag fine powder according to an embodiment of the present invention.

Referring to FIG. 1, a system for manufacturing a powder-activated admixture containing fine ferronickel slag powder includes a raw material supply device 1, a primary grinding device 2, a first classification device 3, and a first powder recovery device 4 ), Second powder recovery device (5), exhaust device (6), first discharge valve (7), transfer device (8), second grinding device (9), second classification device (10), third powder Recovery device 11, fourth powder recovery device 12, second discharge valve 13, third grinding device 14, fifth powder recovery device 15, sixth powder recovery device 16, metering It includes an input device 17, a mixed powder recovery device 18, a control device 19, and an air supply device 20.

Hereinafter, each configuration will be briefly described.

The raw material supply device 1 is configured to store raw materials and to supply a predetermined amount required to the first grinding device 2.

The first grinding device 2 is configured to primarily crush a raw material in a crushing method by an impact and friction method. The rotor provided in the first grinding device 2 is preferably designed to be driven at a linear speed of 90 to 110 m / sec or more, and the most ideal result can be obtained at 100 m / sec. The first grinding device 2 can obtain a powder having a crushing particle size of 10 µm or less through this configuration, and the generated fine powder may have a specific surface area of 5,000 brains or more.

The first classification device 3 includes an air-type classification rotor, and is configured to classify fine powder flowing from the first grinding device 2 by continuously discharging while blocking air to the lower side. In other words, the first classification device 3 is capable of discharging 5,000 brain particles of the fine powder flowing into the first grinding device 2 upward.

The first powder recovery device 4 has a vortex structure and is a configuration for recovering fine powder of 5,000 brains classified in the first classification device 3. A rotary airlock valve (4-1) is installed at the bottom of the first powder recovery device (4) to allow continuous discharge and to design a recovery rate of 90% or more by setting the inlet speed to be 18m / sce or more. It is preferred.

The second powder recovery device 5 has an air pulse jet type structure, and is a structure for recovering fine powder of 10,000 brains classified in the first powder recovery device 4. It is possible to install a rotary air lock valve 5-1 at the bottom of the second powder recovery device 5 to enable continuous automatic discharge, and to maintain a constant differential pressure by activating a solenoid valve and a diaphragm valve by a timer. desirable. This valve configuration of the second powder recovery device 5 is to enable continuous periodic automatic cleaning as well.

The exhaust device 6 is of a turbo type and is designed to ensure that pulverization, classification, and transfer performed in the previous stage are performed at a smooth speed, and is designed in consideration of sufficient wind direction and differential pressure loss.

The first discharge valve (7) is composed of a rotary airlock valve and is disposed under the first classification device (3), and it is preferable to design by maintaining sufficient vacuum to continuously discharge fine powder of 5,000 brains or more continuously.

The conveying device 8 is a configuration for conveying the fine powder discharged from the first discharge valve 7 in a horizontal conveying method to the next process, adopting a screw type to increase the quantitative discharging property, and the discharge port is cut in a triple structure ( Vane) is preferably designed as a structure.

The second crushing device 9 is configured to pulverize finely divided fine powder in a second manner by a pulverization method using a high pressure and a collision method. The second grinding device 9 crushes the fine powder transferred through the conveying device 8 again through an injection method. At this time, the grinding nozzle has a high pressure of 6.5 to 7.5 kg / cm 2 and a nozzle speed of 1,100 to 1,500 m / sec. It is desirable to design to have the most ideal results at high pressure of 7.0㎏ / ㎠ and nozzle speed of 1,300m / sec.

The second classification device 10 includes an air-type classification rotor, and is configured to classify fine powder flowing from the second grinding device 9 by continuously discharging while blocking air to the lower side. In other words, the second classifying device 10 can discharge particles of 20,000 brains from the fine powder flowing into the second grinding device 9 to the upper part.

The third powder recovery device 11 has a vortex structure and is a structure for recovering fine powder of 20,000 brains classified in the second classification device 10. It is preferable to design a rotary airlock valve 11-1 at the lower portion of the third powder recovery device 11 so that continuous discharge is possible and the inlet speed is 18 m / sce or more, so that the recovery rate is 90% or more.

The fourth powder recovery device 12 has an air pulse jet type structure and is configured to recover fine powders of 20,000 brains or less classified by the third powder recovery device 11. It is possible to install a rotary airlock valve 12-1 at the bottom of the fourth powder recovery device 12 to enable continuous automatic discharge and to maintain a constant differential pressure by operating the solenoid valve and the diaphragm valve by a timer. desirable. This valve configuration of the fourth powder recovery device 12 is to enable continuous and automatic cleaning continuously.

The second discharge valve 13 is composed of a rotary air lock valve and is disposed under the second classification device 10, and it is preferable to design by maintaining sufficient vacuum to continuously discharge fine powder of 20,000 brains or more continuously.

The third pulverizing apparatus 14 is configured to crush the classified fine powder into a third order by pulverizing by a high pressure and collision method. The third pulverizing device 14 crushes the fine powder transferred through the conveying device disposed under the second valving valve 13 again through an injection method. At this time, the pulverizing nozzle has a high pressure of 6.5 to 7.5 ㎏ / ㎠ and 1,100. It is desirable to design to have a nozzle speed of ~ 1,500m / sec, and the most ideal results can be obtained at a high pressure of 7.0㎏ / ㎠ and a nozzle speed of 1,300m / sec.

The fifth powder recovery device 15 has a vortex structure and is a structure for recovering fine powder of 30,000 brains crushed third in the third grinding device 14. It is preferable to design the rotary airlock valve 15-1 at the lower portion of the fifth powder recovery device 15 so that continuous discharge is possible and the inlet speed is 18 m / sce or more, so that the recovery rate is 90% or more.

The sixth powder recovery device 16 has an air pulse jet type structure and is configured to recover fine powders of 30,000 brains or less classified by the fifth powder recovery device 15. It is possible to install a rotary air lock valve 16-1 at the bottom of the sixth powder recovery device 16 to enable continuous automatic discharge and to maintain a constant differential pressure by operating the solenoid valve and diaphragm valve by a timer. desirable. This valve configuration of the sixth powder recovery device 16 is to enable continuous periodic automatic cleaning.

Quantitative input device 17 is a configuration for transferring the fine powder classified through the second and third pulverization steps to a mixing device in the rear stage, and the 20,000 brain fine powder and the third pulverization step that have been classified and recovered through the second pulverization step It consists of a hopper for storing each of the fine powders of the 30,000 brains sorted and recovered through, and a screw type transfer device for transmitting each of them to the mixed powder recovery device 18.

The mixed powder recovery device 18 is a configuration for generating a mixed fine powder by mixing at least two or more fine powders classified through a second and third pulverization step, and a third powder recovery device 11 through a second pulverization step It is possible to mix the fine powder of 30,000 brains recovered from the fifth powder recovery device 15 through the third grinding step with the fine powder of 30,000 brains recovered from to produce a mixed fine powder having a specific surface area of 50,000 brains.

Here, the mixed powder recovery device 18 is designed in a ribbon type to mix a fine powder of 20,000 brains and a fine powder of 20,000 brains at a predetermined ratio, and it is preferable to install a load cell.

Next, the control device 19 is a configuration for controlling the above-described configuration, and is capable of automatic manual operation as necessary, and has an emergency notification function or an automatic stop function.

Finally, the air supply device 20 may be configured as an oilless type with an air compressor system, and serves to supply compressed air to the device, such as a classification device and a discharge valve described above.

The method and apparatus for preparing a powder-activated admixture containing fine powder of ferronickel slag according to an embodiment of the present invention are mixed with fine powder of a specific brain obtained through primary, secondary and tertiary grinding and pulverization to obtain a specific surface area of 50,000 brains. It is possible to produce eggplant mixed fine powder.

On the other hand, as described in Figure 1, the method for preparing a powder-activated admixture containing a fine powder of ferronickel slag according to an embodiment of the present invention includes primary, secondary, and tertiary grinding steps, wherein Glycolic, Amine, SAS-based grinding aid is added corresponding to the grinding step. The description thereof will be described again below, and first, for convenience of description, a pulverization aid to be used in the present invention will be described.

[Table 1] below is the amount of raw material used for the pulverization aid to satisfy the target powder degree of 4,000 cm 2 / g, and the amount of usage was calculated according to [Equation 1] below.

Here, Sav means the specific surface area (4,000 cm 2 / g) of the powder, and Na (Avogadro's number) means 6.022 * 10 ²³ .

Grinding aid raw material Molecular weight (M) Molecular surface area (S) Usage (C) Glycolic series
Grinding aid DEG 106.12 2.123E-15 0.033 LS 215.36 4.475E-15 0.032 LGA 168.54 3.459E-15 0.032 HEA2 114.72 1.27E-15 0.060 Amine series
Grinding aid TIPA 93.55 2.431E-15 0.026 Daragrind 762.14 2.376E-15 0.213 TEA 858.29 2.264E-15 0.252 SI 1078.36 6.61E-15 0.108 SAS system
Grinding aid PCE 203.65 6.972E-15 0.019 PA 221.32 3.232E-15 0.045 TDS 106.2 4.247E-15 0.017 EDF 401.78 4.516E-15 0.059

As can be seen in Table 1, Glycolic grinding aids include DEG, LS, LGA, HEA2, Amine grinding aids include TIPA, Daragrind, TEA, SI, SAS grinding aids PCE, PA, TDS, EDF.

Figures 2a to 2d is a graph for explaining the degree of powder according to the addition of a pulverization aid of Glycolic, Figures 3a to 3d is a graph for explaining the degree of powder according to the addition of an amine-based grinding aid, Figure 4a to 4d is SAS-based grinding It is a graph for explaining the powder level according to the addition of the preparation.

Compared to the case in which the grinding aid was not added for each graph, when the grinding aid was added, the grinding ability was increased 1.8 times, the coarse powder was increased, and the particle size distribution was narrowed. Here, an increase in the crushing capacity of 1.8 times means that the pulverization is performed as well as the addition of the pulverization aid, and the increase in the coarse degree means that fine particles are well generated, and the narrower particle size distribution means that the fine particle size is reduced. It means that it is crushed constantly.

According to the results of the experiment, it is preferable to add 0.03 to 0.05% by weight of a grinding aid relative to the weight to be milled, and in particular, the best results can be obtained in a state where 0.04% of grinding aid is added.

On the other hand, the method for preparing a powder-activated admixture comprising a fine powder of ferronickel slag according to an embodiment of the present invention includes primary, secondary, and tertiary grinding steps as described in FIG. 1, and in Table 2 below, 1 A grinding aid added to each of the first grinding device 2 in which the secondary grinding step is performed, the second grinding device 9 in which the secondary grinding step is performed, and the third grinding device 14 in which the second grinding step is performed The types and composition ratios of the products and the unit price of the products are disclosed.

type Composition ratio of raw material for crushing aid (%) four
for
Quantity
(%) Product unit price
(Won / kg) FNS  When producing 1ton
Grinding aid price (KRW) DEG TIPA TDS EDF PCE PA C1 Unit price (won) 3,100 2,450 6,500 12,000 7,800 9,300 7,500 - - - 1st grinding FeNi-GA 35 45 - - 20 - - 0.04 3,747.5 1.499 2nd grinding FeNi-GA-1 - - 50 - 50 - - 0.04 7,150 2.860 Tertiary grinding FeNi-GB - - - 60 40 - - 0.04 10,320 4.128 FeNi-GB-1 - - - 55 35 10 - 0.05 10,260 5.130 FeNi-GB-2 - - - 55 35 - 10 0.05 10,080 5.040

As shown in Table 2, in the case of the present invention, the first grinding aid added in the first grinding step has a composition ratio of DEG: TIPA: PCE of 35:45:20, and the second grinding aid added in the second grinding step. The grinding aid has a composition ratio of TDS: PCE of 50:50, and the third grinding aid added in the third grinding stage has a composition ratio of EDF: PCE of 60:40.

For reference, the third pulverization aid may have a composition ratio of EDF: PCE: PA of 55:35:10 or EDF: PCE: C1 of 55:35:10, but FeNi-GB type is suitable when considering crushability and hardness It can be said.

On the other hand, when using the mixed fine powder produced through the method of manufacturing a powder-activated admixture containing fine powder of ferronickel slag according to an embodiment of the present invention, it is possible to increase the shear strength by 15% compared to general cement through experiments, It was found that the maximum hydration heat can be lowered to 36.0 ° C at a lower cost compared to the existing low heat cement, and the porosity of ordinary concrete can be reduced to 20.5% from 21.68% to 20.5% compared to the 27.23% porosity. In addition, the amount of hexavalent chromium corresponding to the heavy metal was 0.37, resulting in a 59% decrease compared to the previous one. This means that the performance of the cement mixed with it is also dramatically improved by maximizing the properties of the mixed fine powder through the embodiment of the present invention.

Particularly, in the case of the ferronickel slag multi-slag cement in which the ferronickel slag fine powder was substituted by 10%, the activity of 8% or more was improved at the 28th time point.

As a result, the method and apparatus for manufacturing a powder-activated admixture containing fine powder of ferronickel slag according to an embodiment of the present invention can maximize the properties of ferronickel slug as a raw material at a low cost, which is thus produced ferronickel slug In using the powder-activated admixture for fine powder, it means that an environment that can be used universally can be created even if economical efficiency or practicality is considered.

The embodiments described in the present specification and the accompanying drawings are merely illustrative of some of the technical spirit included in the present invention. Therefore, the embodiments disclosed in the present specification are not intended to limit the technical spirit of the present invention, but to explain the present invention, it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Within the scope of the technical spirit included in the specification and drawings of the present invention, modifications and specific embodiments that can be easily inferred by those skilled in the art should be interpreted as being included in the scope of the present invention.

1: Raw material supply device 2: Primary grinding device (2)
3: First classification device 4: First powder recovery device
5: second powder recovery device 6: exhaust device
7: First discharge valve 8: Transfer device
9: 2nd grinding device 10: 2nd classification device
11: third powder recovery device 12: fourth powder recovery device
13: second discharge valve 14: third grinding device
15: fifth powder recovery device 16: sixth powder recovery device
17: quantitative input device 18: mixed powder recovery device
19: control device 20: air supply

Claims (18)

A first grinding step of pulverizing the raw material first;
A second grinding step of secondly grinding the fine powder classified by grinding in the first grinding step;
A third crushing step of pulverizing finely divided fine powder crushed in the second crushing step; And
Mixing at least two or more of the fine powder of the first brain classified through the second grinding step and the fine powder of the second brain classified through the third grinding step to mix the first and second brains with another third brain Comprising the step of generating a fine powder
Method for producing powder-activated admixture comprising ferronickel slag fine powder.
According to claim 1,
Each of the first to third grinding steps is a method for producing a powder-activated admixture comprising a fine powder of ferronickel slag, characterized in that at least one grinding aid among Glycolic-based, Amine-based and SAS-based grinding aids is added.
According to claim 2,
The pulverization aid is a method for producing a powder-activated admixture comprising a fine powder of ferronickel slag, characterized in that 0.03 to 0.05% by weight compared to the crushing target weight.
According to claim 3,
The grinding aid added in the first grinding step is a method for producing a powder-activated admixture comprising ferronickel slag fine powder, characterized in that DEG: TIPA: PCE has a composition ratio of 35:45:20.
According to claim 3,
The grinding aid added in the second grinding step is a method of manufacturing a powder activated admixture comprising a fine powder of ferronickel slag, characterized in that TDS: PCE has a composition ratio of 50:50.
According to claim 3,
The grinding aid added in the third grinding step is characterized in that the composition ratio of EDF: PCE is 60:40 or EDF: PCE: PA is 55:35:10 or EDF: PCE: C1 is 55:35:10. Method for producing powder-activated admixture comprising ferronickel slag fine powder.
According to claim 1,
The first pulverization step of the powder-activated admixture comprising a fine powder of ferronickel slag, characterized in that it is an impact friction method and is driven at a rotor linear speed of 90 to 110 m / sec or more to form a powder having a crushing particle size of 10 µm or less. Manufacturing method.
According to claim 1,
A first classification step of classifying the fine powder generated after the first grinding step; And
After the first classification step further comprises a first and second powder recovery step for recovering the fine powder of 5,000 brain and 10,000 brain, respectively
Method for producing powder-activated admixture comprising ferronickel slag fine powder.
According to claim 1,
The second grinding step is a high pressure collision method, a method of manufacturing a powder-activated admixture comprising ferronickel slag fine powder, characterized in that it has a high pressure of 6.5 to 7.5 kg / cm 2 and a nozzle speed of 1,100 to 1,500 m / cec.
According to claim 1,
A second classification step of classifying the fine powder generated after the second grinding step; And
After the second classification step further comprises a third and fourth powder recovery step for recovering 20,000 brain and 20,000 brain or less fine powder, respectively
Method for producing powder-activated admixture comprising ferronickel slag fine powder.
According to claim 1,
The third pulverization step is a high pressure collision method, a method of manufacturing a powder-activated admixture comprising ferronickel slag fine powder, characterized in that it has a high pressure of 6.5 to 7.5 kg / cm 2 and a nozzle speed of 1,100 to 1,500 m / cec.
The method of claim 10,
After the third classification step further comprises a fifth and sixth powder recovery step for recovering 30,000 brain and fine powder of 30,000 brain or less, respectively
Method for producing powder-activated admixture comprising ferronickel slag fine powder.
The method of claim 12,
In the step of generating the mixed fine powder, a powder comprising ferronickel slag fine powder comprising mixing 20,000 brain fine powder recovered in the third powder recovery step and 30,000 brain fine powder recovered in the fifth powder recovery step. Method for producing activated admixture.
A first pulverizing apparatus for pulverizing the raw materials first;
A first classifying device for classifying fine powder discharged from the first grinding device;
First and second powder recovery devices for recovering fine powder classified in the first classification device;
A first discharge valve disposed under the first classification device and configured to discharge fine powder having a predetermined size or more;
A second grinding device for secondly grinding the fine powder discharged from the first discharge valve;
A second classification device for classifying fine powder discharged from the second crushing device;
A third and fourth powder recovery apparatus for recovering fine powder classified in the second classification apparatus;
A second discharge valve disposed under the second classification device and for discharging fine powder having a predetermined size or more;
A third grinding device for pulverizing the fine powder discharged from the second discharge valve thirdly;
A fifth and sixth powder recovery apparatus for recovering fine powder discharged from the third grinding apparatus; And
It includes a mixed powder recovery device for mixing the fine powder recovered from the third and fifth powder recovery device to produce a mixed fine powder
A device for manufacturing a powder-activated admixture comprising ferronickel slag fine powder.
The method of claim 14,
The first grinding device is an impact friction method, and is driven at a rotor linear speed of 90 to 110 m / sec or more to form a powder having a grinding particle size of 10 µm or less,
The second and third pulverization apparatus is a high pressure collision method, the production of a powder activated admixture containing ferronickel slag fine powder, characterized in that it has a high pressure of 6.5 to 7.5 kg / cm 2 and a nozzle speed of 1,100 to 1,500 m / cec. Device.
The method of claim 14,
The third powder recovery device recovers fine powder of 20,000 brains, and the fifth powder recovery device recovers fine powder of 30,000 brains, thereby manufacturing a powder activated admixture comprising ferronickel slag fine powder.
The method of claim 14,
The first to third pulverizing apparatus is a pulverized nickel powder manufacturing apparatus comprising a fine powder of ferronickel slag, characterized in that at least one pulverization aid is added to the pulverization agent of a glycerol-based, amine-based, or SAS-based pulverizing operation.
Ferronickel slag fine powder mixed multi-slag cement produced by mixing the mixed fine powder of any one of claims 1 to 17 and cement at 10:90.

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