KR102175844B1 - Estimating method of quality of iron ore for manufacturing sintered ore - Google Patents

Abstract

Taking an image in which the contrast of the iron ore passing through the transfer line appears for the production of sintered ore; Obtaining information on the content and porosity of constituents contained in the iron ore from the image; And deriving the quality of the iron ore through the content of the constituent components and the porosity. A method for evaluating the quality of iron ore for manufacturing sintered ore is introduced.

Description

Quality evaluation method of iron ore for manufacturing sintered ore{ESTIMATING METHOD OF QUALITY OF IRON ORE FOR MANUFACTURING SINTERED ORE}

The present invention relates to a method for evaluating the quality of iron ore for manufacturing sintered ore. More specifically, it relates to a method for evaluating the quality of iron ore for manufacturing sintered ore, which can improve the predictive consistency of the quality of iron ore by measuring the content and porosity of the constituents of the iron ore for the manufacture of the sintered ore.

In the recent sintering powdered iron ore used in the sintering process, as the iron content of high-quality iron ore with high iron content and good particle size decreases, deterioration and pulverization are in progress, and the need for new low-grade iron ore due to the depletion of such high-quality ore This is emerging.

When using a new sintered ore, it is necessary to predict the quality impact and the conditions of low-grade ore use, and for this purpose, a sintered ore quality prediction equation using the physicochemical properties of iron ore has been previously studied.

The predicted quality is three aspects of sintered ore strength, product recovery, and productivity, and each of the factors used are the porosity measured in the nuclear particle assimilation reaction experiment, the fluidity measured in the adhesion particle melt fluidity experiment, the air permeability, the average particle size, and the number of crystals. Through this, when a new ore is introduced, it is possible to quantitatively predict whether it is possible to maintain a similar level compared to the quality of the existing sintered ore when used as a raw material for sintering.

It is necessary to apply on-site by improving the consistency of the previously studied sintered ore quality prediction model. In other words, it is necessary to combine the data for the organizational quantification of iron ore as one factor to improve the consistency.

However, when the existing sintered ore structure quantification technology is applied, the quality of the sintered ore is predicted based on the result that has already been discharged into the sintered ore, so there is a problem that the field applicability is poor. The limitations are clear when considering the time it takes for the production and analysis of tissue specimens to be taken to quantify a single tissue.

Therefore, as shown in FIG. 1, there is a need for a technology capable of improving prediction consistency by predicting (B) the quality of iron ore for manufacturing the sintered ore rather than predicting (A) the quality of the sintered ore based on the result already discharged to the sintered ore. to be.

Provides a method for evaluating the quality of iron ore for sintering ore manufacturing that can improve the predictive consistency of the quality of iron ore by measuring the content and porosity of the constituents of iron ore for the manufacture of sintered ore and measuring the assimilation rate, density, and content of harmful elements of iron ore. do.

A method for evaluating the quality of iron ore for manufacturing sintered ore according to an embodiment of the present invention includes: photographing an image in which the contrast of the iron ore for manufacturing sintered ore appears; Obtaining information on the content and porosity of constituents contained in the iron ore from the image; And deriving the quality of the iron ore through the content of the constituents and the porosity.

In the step of photographing the image, the iron ore may be irradiated with light using an optical camera, and an image in which the contrast of the iron ore appears according to the luminance value of the light reflected from the iron ore may be generated.

The obtaining of the information may include dividing constituent components and voids included in the iron ore according to light and dark in the image; And obtaining information on the content and porosity of constituents contained in the iron ore by calculating the area of the image divided by the light and dark.

In the step of separating the constituents and voids, magnetite, hematite, goethite, kaolinite, gibbstite, quartz, and voids contained in the iron ore Can be distinguished.

In the step of obtaining the information, among the constituents of the iron ore from the image, magnetite, hematite, goethite, kaolinite, gibbstite, and quartz It is possible to obtain information on the content and porosity of.

In the deriving step, the assimilation rate of the iron ore may be measured through the content and the porosity of the Kaolinite, Gibbstite, and Quartz.

In the deriving step, through the content of the magnetite, hematite, goethite, kaolinite, gibbstite, and quartz, and the porosity of the iron ore. Density can be measured.

In the deriving step, through the content of the magnetite, hematite, goethite, kaolinite, gibbstite, and quartz, and the porosity of the iron ore. The content of harmful elements can be measured.

According to the method for evaluating the quality of iron ore for manufacturing sintered ore according to an embodiment of the present invention, by measuring the content of constituents and porosity of the iron ore transferred for the manufacture of the sintered ore, the assimilation rate, density and content of harmful elements of the iron ore are measured. It can improve predictive consistency for quality.

1 is a position in which the quality of the sintered ore is predicted (A) based on the result of the sintering ore discharged as before in the sintering process, and, as in an embodiment of the present invention, the quality of the iron ore for manufacturing the sintered ore is predicted ( B) is a diagram showing the location.
2 is a graph showing a state in which the assimilation rate of iron ore changes according to the content of each component of iron ore.

Terms such as first, second and third are used to describe various parts, components, regions, layers, and/or sections, but are not limited thereto. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, a first part, component, region, layer or section described below may be referred to as a second part, component, region, layer or section without departing from the scope of the present invention.

The terminology used herein is for referring only to specific embodiments and is not intended to limit the present invention. Singular forms as used herein also include plural forms unless the phrases clearly indicate the opposite. As used in the specification, the meaning of “comprising” specifies a specific characteristic, region, integer, step, action, element and/or component, and the presence of another characteristic, region, integer, step, action, element and/or component It does not exclude additions.

When a part is referred to as being "on" or "on" another part, it may be directly on or on another part, or other parts may be involved in between. In contrast, when a part is referred to as being “directly above” another part, no other part is intervened.

Although not defined differently, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms defined in a commonly used dictionary are additionally interpreted as having a meaning consistent with the related technical literature and the presently disclosed content, and are not interpreted in an ideal or very formal meaning unless defined.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

Sintered ore Quality evaluation method of manufacturing iron ore

The method for evaluating the quality of iron ore for manufacturing sintered ore according to an embodiment of the present invention includes taking an image showing the contrast of the iron ore for manufacturing the sintered ore, obtaining information on the content and porosity of the constituents contained in the iron ore from the image. It includes the step of deriving the quality of the iron ore through the step and the content and porosity of the constituents.

First, in the step of photographing an image, an image showing the contrast of the iron ore is obtained by photographing the iron ore for the manufacture of the sintered ore. The iron ore may be an iron ore that is transferred to a sintered ore manufacturing process for manufacturing a sintered ore.

Specifically, it is possible to irradiate light to the iron ore using an optical camera, and generate an image in which the contrast of the iron ore appears according to the luminance value of light reflected from the iron ore. The amount of reflected light that is reflected after being irradiated with iron ore, that is, luminance, can be detected, and converted into an image image so that the contrast according to each luminance value is displayed through the luminance data. In this case, the image may be imaged to have different contrast according to the luminance value.

Next, in the step of obtaining information, information on the content and porosity of constituents contained in the iron ore is obtained from the image.

Specifically, the step of obtaining the information includes the steps of dividing the constituents and voids contained in the iron ore by contrast in the image, and calculating the area of the image divided by contrast to provide information on the content and porosity of the constituents contained in the iron ore. It may include the step of obtaining.

At this time, in the step of classifying the components and voids, magnetite, hematite, Goethite, Kaolinite, Gibbstite, quartz, and voids contained in the iron ore are Can be distinguished. Contrast values for magnetite, hematite, Goethite, Kaolinite, Gibbstite, quartz, and voids are preset and constituents according to the contrast value. And voids can be distinguished.

When the division is finished, the area of the divided image can be calculated to obtain information on the content and porosity of constituents contained in the iron ore.

The information at this time may be the content and porosity of magnetite, hematite, goethite, kaolinite, gibbstite, and quartz.

Next, in the deriving step, the quality of iron ore is derived through the content of the constituents and the porosity. It can be evaluated by predicting the quality of iron ore by measuring the assimilation rate, density, and content of harmful elements of the iron ore from the content and porosity of the constituent components.

Specifically, the assimilation rate of iron ore can be measured through the content and porosity of Kaolinite, Gibbstite, and Quartz.

The assimilation rate is a factor that influences the strength and productivity of the sintered ore due to the difference in the formation of the melt due to the difference in reactivity between the nuclear particles and the attached particles for each type of light. After assimilation, the porosity has a positive correlation with the reducibility of the sintered ore. Kaolinite is Al ₂ O ₃ -SiO _{2 in} which alumina and silica coexist as its main component, Gibbstite is Al ₂ O ₃ as its main component, and Quartz has SiO ₂ as its main component. do.

Accordingly, according to FIG. 2, the higher the content and porosity of Kaolinite, the higher the assimilation rate of iron ore, and the higher the content of Gibbstite and Quartz, the lower the assimilation rate of iron ore.

Specifically, the density of iron ore can be measured through the contents and porosity of magnetite, hematite, Goethite, kaolinite, Gibbstite, and quartz. .

Density is an important factor in granulation design because it is related to mineral structure and water content, and it affects charging density control and high temperature reaction in the sintering process. Magnetite may be Keno-magnetite, and may have Fe ₃ O ₄ as a main component. Hematite may be Hematite and hydro-hematite, and may have Fe ₂ O ₃ as a main component. Goethite may be Vitreous goethite and Ochreous goethite, and has HFeO ₂ as a main component.

Specifically, through the content and porosity of magnetite, hematite, Goethite, kaolinite, Gibbstite, and quartz, the content of harmful elements in iron ore can be measured. I can.

Compared to iron ores hematite, magnetite, and goetite, if there are more gangue minerals such as kaolinite, gibbtite, and quartz, it may mean that there are many impurities.

Hereinafter, specific examples of the present invention will be described. However, the following examples are only specific examples of the present invention, and the present invention is not limited to the following examples.

Example

An image showing the contrast of iron ore for the manufacture of sintered ore was taken. The iron ore was irradiated with light using an optical camera, and an image in which the contrast of the iron ore was displayed according to the luminance value of light reflected from the iron ore was generated.

Information on the content and porosity of constituents contained in iron ore was obtained from the image. In the image, the constituent components and voids contained in the iron ore were classified by contrast, and the area of the image divided by contrast was calculated to obtain information on the content and porosity of the constituent components contained in the iron ore.

The content and porosity of the constituents of the iron ore are shown in Table 1 below.

division
(weight%) Keno-magnetite Hematite Hydro-hematite Vitreous goethite Ochreous goethite Kaolinite Quartz Pores
(%) Psalm 1 0.0876 1.83 0 5.31 9.65 80.12 2.99 23.08 Psalm 2 0.0970 97.92 0.0569 1.26 0.49 0.3 0.0405 18.11 Psalm 3 1.57 97.02 0.15 0.85 0.36 0.0493 0.0033 5.27 Psalm 4 0.053 1.39 0.0408 75.65 21.3 1.53 0.0262 17.56 Psalm 5 0.93 84.88 0.59 11.65 1.86 0.0573 0.026 6.24 Psalm 6 0.58 79.19 0.19 15.86 3.94 0.22 0.0265 14.84 Psalm 7 0.37 34.07 0.18 45.94 18 1.41 0.040 21.28 Psalm 8 1.18 38.97 0.61 53.08 5.97 0.13 0.0493 10.9

The assimilation rate, density, and content of harmful elements of iron ore were measured through the content and porosity of the constituent components measured according to Table 1 above.

The measured assimilation rate, density, and content of harmful elements of each specimen are shown in Table 2 below.

division Assimilation rate (%) Density (g/mm ³ ) Content of harmful elements 1 Noxious element content2 Psalm 1 98.47 3.82 5.82 1.59 Psalm 2 98.11 3.91 4.56 1.86 Psalm 3 87.14 4.23 4.92 2.72 Psalm 4 91.00 4.79 1.52 1.54 Psalm 5 79.80 4.75 6.16 0.55 Psalm 6 83.54 4.83 4.59 1.54 Psalm 7 94.32 3.84 5.74 1.88 Psalm 8 91.68 4.31 4.75 2.24

* In Table 2, the harmful element content 1 and the harmful element content 2 mean the weight% of SiO ₂ and Al ₂ O ₃ , respectively.

The present invention is not limited to the above embodiments and/or embodiments, but may be manufactured in various different forms, and those of ordinary skill in the art to which the present invention pertains change the technical spirit or essential features of the present invention. It will be appreciated that it can be implemented in other specific forms without doing so. Therefore, it should be understood that the embodiments and/or embodiments described above are illustrative and non-limiting in all respects.

Claims (8)

Photographing an image in which the contrast of iron ore for the production of sintered ore appears;
Obtaining information on the content and porosity of constituents contained in the iron ore from the image; And
Deriving the quality of the iron ore through the content of the constituents and the porosity; including,
In the step of obtaining the information, among the constituents of the iron ore from the image, magnetite, hematite, goethite, kaolinite, gibbstite, and quartz To obtain information on the content and porosity of,
In the deriving step, the quality evaluation method of iron ore for producing sintered ore by measuring the assimilation rate of the iron ore through the content and the porosity of the kaolinite, gibbstite, and quartz. The method of claim 1,
In the step of taking the image,
A method for evaluating the quality of iron ore for producing sintered ore in which light is irradiated to the iron ore using an optical camera, and an image in which the contrast of the iron ore appears according to the luminance value of light reflected from the iron ore is generated. The method of claim 1,
The step of obtaining the information,
Dividing constituent components and voids included in the iron ore according to contrast in the image; And
A method for evaluating the quality of iron ore for producing sintered ore comprising; calculating the area of the image divided by light and dark to obtain information on the content and porosity of constituents contained in the iron ore. The method of claim 3,
In the step of separating the constituent components and voids,
A method for evaluating the quality of iron ore for manufacturing sintered ore to distinguish between magnetite, hematite, goethite, kaolinite, gibbstite, quartz and voids contained in the iron ore. delete delete The method of claim 1,
In the deriving step,
For the production of sintered ore measuring the density of the iron ore through the contents and the porosity of the magnetite, hematite, Goethite, Kaolinite, Gibbstite, and quartz Method for evaluating the quality of iron ore. The method of claim 1,
In the deriving step,
The content of the magnetite, hematite, goethite, kaolinite, gibbstite, and quartz, and the porosity, to measure the content of harmful elements in the iron ore Method for evaluating the quality of iron ore for sintering ore manufacturing

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