CN106546591B - Method for detecting uniformity of sinter - Google Patents
Method for detecting uniformity of sinter Download PDFInfo
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- CN106546591B CN106546591B CN201610978739.9A CN201610978739A CN106546591B CN 106546591 B CN106546591 B CN 106546591B CN 201610978739 A CN201610978739 A CN 201610978739A CN 106546591 B CN106546591 B CN 106546591B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
Abstract
The invention discloses a method for detecting uniformity of a sinter, which comprises the steps of observing and recording positions of different minerals in the sinter by using an optical microscope, further drawing a mineral distribution diagram in the sinter, calculating the uniformity of the distribution of each main mineral in the sinter according to the distribution condition of each main mineral in different areas in the distribution diagram, calculating the uniformity quantification of the sinter according to the uniformity of the distribution of the main mineral in the sinter, and then quantitatively evaluating the uniformity of the sinter by using the uniformity of the sinter. According to the invention, the uniformity quantification of the sinter is gradually calculated by drawing the mineral distribution map in the sinter, the uniformity index of the sinter is accurately quantified by using the uniformity of the sinter, and the uniformity of the sinter can be visually represented.
Description
Technical Field
The application relates to the technical field of mineral exploration, in particular to a method for detecting uniformity of sinter.
Background
As a heterogeneous iron-containing artificial iron ore, the sintering ore is pre-mixed in a raw material field in the production process of the sintering ore, and the primary mixing and the secondary mixing of sintering ingredients and the adoption of various segregation material distribution technologies aim to improve the stability and the uniformity of the sintering ore as much as possible.
The uniform and stable sintered ore can improve the strength of the sintered ore and the metallurgical performance of the sintered ore, and is important for ensuring the smooth running stability of the blast furnace.
However, at present, there is no specific evaluation index for the uniformity of the sintered ore, and the method for detecting the uniformity of the sintered ore is not referred to, so that it is necessary to find a method for detecting the uniformity of the sintered ore to objectively and quantitatively provide the uniformity index of the sintered ore.
Disclosure of Invention
The invention provides a method for detecting the uniformity of a sinter, which aims to solve the technical problem that the uniformity of the sinter cannot be evaluated by detecting at present.
In order to solve the technical problem, the invention provides a method for detecting the uniformity of a sinter, which comprises the following steps:
analyzing the positions of different minerals in the sintered ore by using an optical microscope to obtain a mineral distribution map in the sintered ore;
calculating the distribution uniformity of each main mineral in the sintered ore according to the distribution condition of each main mineral in different areas in the mineral distribution map;
calculating to obtain the uniformity quantification of the sintered ore according to the distribution uniformity of each main mineral in the sintered ore;
quantitatively determining the uniformity of the sintered ore based on the uniformity of the sintered ore.
Preferably, the analyzing the positions of different minerals in the sintered ore by using an optical microscope to obtain a mineral profile in the sintered ore comprises:
preparing a sintered ore sample into a crystal phase sample according with the observation of the optical microscope;
putting the crystal phase sample under the optical microscope, and obtaining the mineral composition of a total L x L point region with equal length, width and point number by using a point counting method; wherein L is the number of long points or the number of wide points of the mineral distribution map in the sintered ore; l is a positive integer and is more than or equal to 10;
and marking the minerals of each point region at the corresponding positions of the L-L matrix in different colors, and obtaining the mineral distribution map in the sintered ore after marking.
Preferably, the calculating the uniformity of the distribution of each main mineral in the sintered ore according to the distribution of each main mineral in different areas in the mineral distribution map includes:
alternately selecting N blocks of areas in the mineral distribution map, wherein N is a positive integer and is more than or equal to 9;
respectively counting the content of each main mineral in the N regions, wherein each main mineral comprises composite calcium ferrite SFCA, magnetite M and hematite H, and the content of each main mineral is respectively marked as x _ SFCAi，x_Mi，x_Hi，i＝1，…N；
Separately calculating the homogeneity RSD of SFCA, M and H in the sinterSFCA、RSDMAnd RSDH。
Preferably, the separately calculating the homogeneity RSD of SFCA, M and H within the sinterSFCA、RSDMAnd RSDHThe method comprises the following steps: RSD was calculated using the following formulaSFCA：
RSDSFCA: uniformity of distribution of SFCA within the sinter;
n: the number of selected areas in the sintered ore;
x_SFCAi: the SFCA content in block i, i 1, … N.
Preferably, the separately calculating the homogeneity RSD of SFCA, M and H within the sinterSFCA、RSDMAnd RSDHThe method comprises the following steps:
RSD is obtained by the following formulaM：
RSDM: the uniformity of the distribution of M within the sinter;
n: the number of selected areas in the sintered ore;
x_Mi: the content of M in the i blocks, i is 1, … N.
Preferably, the separately calculating the homogeneity RSD of SFCA, M and H within the sinterSFCA、RSDMAnd RSDHThe method comprises the following steps:
RSD is obtained by the following formulaH：
RSDH: h is distributed in the sintered ore uniformly;
n: the number of selected areas in the sintered ore;
x_Hi: the content of H in block i, i ═ 1, … N.
Preferably, the calculating the sintered ore uniformity quantification according to the uniformity of the distribution of each main mineral in the sintered ore comprises:
the sintered ore uniformity quantitative UC is calculated by the following formulasinter：
UCsinter: uniformity of the sinter;
XSFCA: the overall content of SFCA in the sinter;
XM: the overall content of M in the sinter;
XH: the overall content of H in the sinter.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
drawings
FIG. 1 is a schematic diagram of a method for detecting uniformity of sintered ore according to an embodiment of the present invention;
FIG. 2 is a mineral profile of a sintered ore according to an embodiment of the present invention.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
The implementation principle of the invention is that the uniformity index of the sinter is comprehensively evaluated by measuring the distribution of different minerals in the sinter and the uniformity of each main mineral component in the sinter and detecting the uniformity of the obtained sinter.
The method comprises the steps of observing and recording positions of different minerals in a sinter by using an optical microscope, further drawing a mineral distribution diagram in the sinter, calculating the distribution uniformity of each main mineral in the sinter according to the distribution condition of each main mineral in different areas in the distribution diagram, calculating the uniformity quantification of the sinter according to the distribution uniformity of the main mineral in the sinter, and then quantitatively evaluating the uniformity of the sinter by using the uniformity of the sinter. The invention gradually calculates the uniformity UC of the sinter by drawing a mineral distribution map in the sintersinterAccurately utilizes the uniformity index of the sinter to the uniformity UC of the sintersinterQuantification can visually represent the uniformity of the sintered ore.
The main difficulties of the invention are a method for drawing a mineral distribution map in the sinter, a method for calculating the uniformity of the distribution of each main mineral in the sinter and a method for calculating the uniformity of the sinter.
In the following examples, referring to fig. 1, a method of detecting homogeneity of sintered ore is disclosed.
And S11, analyzing the positions of different minerals in the sintered ore by using an optical microscope to obtain a mineral distribution map in the sintered ore.
In a specific implementation, the implementation of mapping the minerals within the sinter is as follows:
firstly, preparing a sintered ore sample into a crystalline phase sample according with the observation of the optical microscope; then, the crystalline phase sample is placed under the optical microscope, and the mineral composition of a total L x L point region with equal length, width and point number is obtained by a point counting method; wherein L is the number of long points or the number of wide points of the mineral distribution map in the sintered ore; l is a positive integer and is more than or equal to 10; and secondly, marking the minerals in each point area at the corresponding positions of the L-L matrix in different colors, and obtaining a mineral distribution map in the sintered ore after marking.
For example, a sintered ore sample is prepared into a crystalline phase sample suitable for being observed by an optical microscope, the sample is placed under an optical microscope with the magnification of 500 times for observation, the mineral composition of 900 point areas with the length of 30 points and the width of 30 points is observed by a point counting method, as shown in figure 2, each point area has mineral, and the uniformity of the sintered ore can be visually observed through the mineral distribution diagram.
Of course, the minerals in each point area can be marked at the corresponding positions in fig. 2 in different colors, such as the cyan color of the composite calcium ferrite (SFCA), the yellow color of the magnetite (M), the white color of the hematite (H), the dark gray color of the glass phase (G), the black color of other minerals (O), and the like, and after the marking is completed, the mineral distribution map in the sintered ore can be obtained, so that the uniformity of the sintered ore can be observed more visually.
And S12, calculating the distribution uniformity of the main minerals in the sintered ore according to the distribution situation of the main minerals in different areas in the mineral distribution diagram.
In a specific implementation process, N blocks of areas can be alternately selected from the mineral distribution map, wherein N is a positive integer and is more than or equal to 9; a region may be formed by several dot regions or may be a single dot region (for example, in fig. 1, 18 dot regions are grouped together, and each dot region is 20 dot regions are grouped together). Then respectively counting the content of each main mineral in the N areas, wherein each main mineral comprises composite calcium ferrite SFCA, magnetite M and hematite H, and the content of each main mineral is respectively marked as x _ SFCAi，x_Mi，x_HiI is 1, … N; then, the uniformity RSD of SFCA, M and H in the sinter is calculated by using a formulaSFCA、RSDMAnd RSDH。
Obtaining RSD is described belowSFCA、RSDMAnd RSDHThe specific implementation process of (1).
Calculation of RSD Using equation 1SFCA：
RSDSFCA: uniformity of distribution of SFCA within the sinter;
n: the number of selected areas in the sintered ore;
x_SFCAi: the SFCA content in block i, i 1, … N.
RSD obtained by equation 2M：
RSDM: the uniformity of the distribution of M within the sinter;
n: the number of selected areas in the sintered ore;
x_Mi: the content of M in the i blocks, i is 1, … N.
RSD obtained using equation 3H：
RSDH: h is distributed in the sintered ore uniformly;
n: the number of selected areas in the sintered ore;
x_Hi: the content of H in block i, i ═ 1, … N.
For example, 18 regions (gray part in fig. 2, and N is 18) are alternately selected from the mineral distribution map, and the contents of main minerals in the 18 regions, including SFCA, M, and H, are counted respectively and are denoted as x _ SFCAi，x_Mi，x_Hi(i ═ 1, 2, … 18), and the homogeneity RSD of SFCA, M, and H in the sintered ore was calculated using formula 1 to formula 3SFCA、RSDMAnd RSDHFinally, the formula 4 is used to calculate the uniformity UC of the sintersinter。
And S13, calculating to obtain the uniformity quantification of the sintered ore according to the uniformity of the distribution of each main mineral in the sintered ore.
The sintered ore uniformity quantitative UC is calculated by the following formula 4sinter：
UCsinter: quantifying the uniformity of the sinter;
XSFCA: the overall content of SFCA in the sinter;
XM: the overall content of M in the sinter;
XH: the overall content of H in the sinter.
S14, quantitatively determining the uniformity of the sintered ore based on the uniformity of the sintered ore.
The uniformity of the sintered ore is quantitatively expressed by the uniformity of the sintered ore, and the uniformity of the sintered ore can be obtained by determining the uniformity of the sintered ore quantitatively.
Through one or more embodiments of the present invention, the present invention has the following advantageous effects or advantages:
the invention discloses a method for detecting uniformity of a sinter, which comprises the steps of observing and recording positions of different minerals in the sinter by using an optical microscope, further drawing a mineral distribution diagram in the sinter, calculating the uniformity of the distribution of each main mineral in the sinter according to the distribution condition of each main mineral in different areas in the distribution diagram, calculating the uniformity quantification of the sinter according to the uniformity of the distribution of the main mineral in the sinter, and then quantitatively evaluating the uniformity of the sinter by using the uniformity of the sinter. According to the invention, the uniformity quantification of the sinter is gradually calculated by drawing the mineral distribution map in the sinter, the uniformity index of the sinter is accurately quantified by using the uniformity of the sinter, and the uniformity of the sinter can be visually represented.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (4)
1. A method for detecting uniformity of sintered ore, which is characterized by comprising the following steps:
analyzing the positions of different minerals in the sintered ore by using an optical microscope to obtain a mineral distribution map in the sintered ore, wherein the mineral distribution map comprises the following steps: preparing a sintered ore sample into a crystal phase sample according with the observation of the optical microscope; putting the crystal phase sample under the optical microscope, and obtaining the mineral composition of a total L x L point region with equal length, width and point number by using a point counting method; wherein L is the number of long points or the number of wide points of the mineral distribution map in the sintered ore; l is a positive integer and is more than or equal to 10; marking the minerals of each point region at the corresponding positions of the L-L matrix in different colors, and obtaining a mineral distribution map in the sintered ore after marking is finished;
calculating the distribution uniformity of each main mineral in the sintered ore according to the distribution condition of each main mineral in different areas in the mineral distribution map, wherein the calculation method comprises the following steps: alternately selecting N blocks of areas in the mineral distribution map, wherein N is a positive integer and is more than or equal to 9; respectively counting the content of each main mineral in the N regions, wherein each main mineral comprises composite calcium ferrite SFCA, magnetite M and hematite H, and the content of each main mineral is respectively marked as x _ SFCAi，x_Mi，x_HiI is 1, … N; separately calculating the homogeneity RSD of SFCA, M and H in the sinterSFCA、RSDMAnd RSDH；
According to the distribution uniformity of each main mineral in the sinter, calculating the uniformity quantification of the sinter, which comprises the following steps: the sintered ore uniformity quantitative UC is calculated by the following formulasinter：UCsinter: uniformity of the sinter; xSFCA: the overall content of SFCA in the sinter; xM: the overall content of M in the sinter; xH: the overall content of H in the sinter;
quantitatively determining the uniformity of the sintered ore based on the uniformity of the sintered ore.
2. The method of claim 1, wherein the separately calculating RSD for uniformity of SFCA, M, and H within the sinter oreSFCA、RSDMAnd RSDHThe method comprises the following steps:
RSD was calculated using the following formulaSFCA：
RSDSFCA: uniformity of distribution of SFCA within the sinter;
n: the number of selected areas in the sintered ore;
x_SFCAi: the SFCA content in block i, i 1, … N.
3. The method of claim 1, wherein the separately calculating RSD for uniformity of SFCA, M, and H within the sinter oreSFCA、RSDMAnd RSDHThe method comprises the following steps:
RSD is obtained by the following formulaM：
RSDM: the uniformity of the distribution of M within the sinter;
n: the number of selected areas in the sintered ore;
x_Mi: the content of M in the i blocks, i is 1, … N.
4. The method of claim 1, wherein the separately calculating RSD for uniformity of SFCA, M, and H within the sinter oreSFCA、RSDMAnd RSDHThe method comprises the following steps:
RSD is obtained by the following formulaH：
RSDH: h is distributed in the sintered ore uniformly;
n: the number of selected areas in the sintered ore;
x_Hi: the content of H in block i, i ═ 1, … N.
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