CN111289320A - Iron ore concentrate standard sample and preparation method thereof - Google Patents
Iron ore concentrate standard sample and preparation method thereof Download PDFInfo
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- CN111289320A CN111289320A CN202010095545.0A CN202010095545A CN111289320A CN 111289320 A CN111289320 A CN 111289320A CN 202010095545 A CN202010095545 A CN 202010095545A CN 111289320 A CN111289320 A CN 111289320A
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- concentrate
- standard sample
- iron ore
- sample
- ore
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000012141 concentrate Substances 0.000 title claims abstract description 100
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 28
- 238000012216 screening Methods 0.000 claims abstract description 21
- 238000007885 magnetic separation Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000018044 dehydration Effects 0.000 claims abstract description 7
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 7
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 8
- 208000005156 Dehydration Diseases 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 18
- 239000010959 steel Substances 0.000 abstract description 18
- 239000000843 powder Substances 0.000 abstract description 6
- 230000003245 working effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000012372 quality testing Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000012430 stability testing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
Abstract
The invention discloses an iron ore concentrate standard sample and a preparation method thereof. In the preparation method of the iron ore concentrate standard sample, the granularity of the reselected ore powder is more uniform and finer through a secondary ore grinding process, and the working effect and quality of magnetic separation work are ensured. Through adopting gravity concentration, magnetic separation and dehydration tank screening in proper order, and then obtain the more even concentrate of granularity to when guaranteeing that the sample of making carries out a lot of samples, the composition content deviation of each standard sample is minimum, more is favorable to steel quality testing work, and the result is true more accurate. In addition, after the dried concentrate is mixed for many times, the uniformity of the concentrate is better, and the standard sample has the advantages of good uniformity, good stability, high accuracy and the like.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to an iron ore concentrate standard sample and a preparation method thereof.
Background
In daily life and work of people, steel products are visible everywhere and have wide application, and the steel products become one of the important articles indispensable in work and life of people. With the progress of society and the development of science and technology, the requirements of people on higher steel products, such as higher quality, longer service life and the like, are met. In the process of steel smelting and preparation, steel mills pay more attention to process control and parameter control, and strictly inspect the quality of the produced steel so as to meet the manufacturing requirements of related steel products and equipment.
The steel yield of China is huge, but the quality detection of steel still has problems. At present, the quality inspection of steel after being produced in China needs to adopt a standard sample for comparison besides a relevant inspection instrument, and whether the quality of steel is qualified or not is judged by comparing the standard sample with the cost ratio in the standard sample. However, the existing standard sample is not uniform, so that the deviation of the inspection result of multiple sampling is large, the result of steel quality detection is influenced, and the accuracy is low.
Therefore, how to solve the problems of poor uniformity, low stability, low accuracy and the like of the existing iron ore concentrate standard sample from two aspects of components and preparation methods becomes a problem to be solved urgently.
Disclosure of Invention
In view of this, the invention provides an iron ore concentrate standard sample and a preparation method thereof, which can improve the uniformity of the iron ore concentrate standard sample and ensure the stability of the iron ore concentrate standard sample.
The invention provides an iron ore concentrate standard sample, which comprises 25.0-30.0% of FeO and SiO in percentage by weight23.0-7.0％，Al2O30.05-0.2％，CaO 0.1-0.5％，MgO 0.1-0.5％， MnO 0.03-0.08％，TiO20.01-0.05%, P0.005-0.02%, S0.01-0.2%, and the rest is TFe.
The invention also provides a preparation method of the iron ore concentrate standard sample, which comprises the following steps:
raw ore screening: screening raw ores to meet the design requirements of iron ore concentrate components;
crushing: crushing the screened raw ore;
grinding: putting the crushed raw ore into a mill for grinding;
and (3) reselection: coarse dressing the ground raw ore by adopting a gravity separation method;
secondary grinding: placing the reselected raw ore into a mill for secondary grinding;
magnetic separation: selecting the raw ore subjected to secondary grinding by adopting a magnetic separation method to obtain concentrate;
and (3) dehydration treatment: placing the concentrate subjected to magnetic separation into a dewatering tank to finish concentration work, and performing primary dewatering treatment on the concentrate;
and (3) filtering: filtering the concentrated concentrate to further remove water in the concentrate;
drying: drying the filtered concentrate;
screening: screening the dried concentrate, and selecting the concentrate with the granularity of more than or equal to 180 meshes;
preparing a sample: and (4) uniformly mixing the screened qualified concentrate for multiple times, and then filling the mixture into a bottle.
Preferably, in the crushing step, a three-stage crushing method is adopted.
Further preferably, in the drying step, the drying temperature is 105 ℃ and the drying time is 8 hours.
More preferably, in the step of preparing a sample, the sample prepared at one time has a weight of 100kg, and is contained in 1000 bottles of 100g per bottle.
The standard sample of the iron ore concentrate provided by the invention controls FeO and SiO in the standard sample of the iron ore concentrate2，Al2O3，CaO，MgO，MnO，TiO2And the contents of P and S ensure that the iron ore concentrate standard sample has good stability while meeting related requirements and standards.
According to the preparation method of the iron ore concentrate standard sample, secondary grinding is carried out after reselection, so that the granularity of the reselected raw ore particles is more uniform and finer, the size deviation is not large, and the subsequent magnetic separation work is ensured to be smoothly carried out. By selecting the concentrate with the granularity of more than or equal to 180 meshes, the fineness of the standard sample of the iron concentrate is ensured to meet the use requirement and relevant regulations. The raw ore is screened by adopting the gravity separation, magnetic separation and dehydration tank screening modes in sequence, so that the granularity of the finally obtained concentrate is more uniform and consistent when the component content meets the requirements and standards, the uniformity of the finally prepared iron ore concentrate standard sample is ensured to meet the requirements and standards, the cost content deviation of the iron ore concentrate standard sample is small, the iron and steel quality detection is facilitated, and the result is real and reliable. And the uniformity of the finally prepared iron ore concentrate standard sample is further ensured by mixing the dried ore concentrate for multiple times.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Detailed Description
Exemplary embodiments will be described in detail herein.
In order to solve the problem that the composition ratio of the existing iron ore concentrate standard sample influences the comprehensive performance of the existing iron ore concentrate standard sample, the embodiment provides the iron ore concentrate standard sample, and specifically, the iron ore concentrate standard sample contains 25.0 to 30.0 weight percent of FeO and 25.0 to 30.0 weight percent of SiO23.0-7.0％，Al2O30.05-0.2％，CaO 0.1-0.5％，MgO 0.1-0.5％，MnO 0.03-0.08％，TiO20.01-0.05%, P0.005-0.02%, S0.01-0.2%, and the rest is TFe.
By controlling the component proportion in the iron ore concentrate standard sample, the iron ore concentrate standard sample not only meets the relevant requirements and standards, but also ensures that the iron ore concentrate standard sample has good stability, so that the iron ore concentrate standard sample has stronger standard and is more reliable and accurate in quality detection of steel.
In order to solve the problem of poor uniformity of the existing iron ore concentrate standard sample, the embodiment provides a preparation method of the iron ore concentrate standard sample, which specifically comprises the following steps:
1) raw ore screening: screening raw ores to meet the design requirements of iron ore concentrate components;
2) crushing: crushing the screened raw ore;
3) grinding: putting the crushed raw ore into a mill for grinding;
4) and (3) reselection: coarse dressing the ground raw ore by adopting a gravity separation method;
5) secondary grinding: placing the reselected raw ore into a mill for secondary grinding;
6) magnetic separation: selecting the raw ore subjected to secondary grinding by adopting a magnetic separation method to obtain concentrate;
7) and (3) dehydration treatment: placing the concentrate subjected to magnetic separation into a dewatering tank to finish concentration work, and performing primary dewatering treatment on the concentrate;
8) and (3) filtering: filtering the concentrated concentrate to further remove water in the concentrate;
9) drying: drying the filtered concentrate;
10) screening: screening the dried concentrate, and selecting the concentrate with the granularity of more than or equal to 180 meshes;
11) preparing a sample: and (4) uniformly mixing the screened qualified concentrate for multiple times, and then filling the mixture into a bottle.
According to the preparation method of the iron ore concentrate standard sample, after the crushed raw ore is reselected, the reselected ore powder is subjected to secondary ore grinding, so that the granularity of the reselected ore powder is more uniform and fine, the subsequent magnetic separation work is ensured to be smoothly carried out, and the working effect and quality of the magnetic separation work are ensured. The preparation method of the iron ore concentrate standard sample selects ore concentrate with the granularity of more than or equal to 180 meshes, and ensures that the iron ore concentrate standard sample has fine granularity so as to meet the use requirements and relevant regulations.
According to the preparation method of the iron ore concentrate standard sample, the ore powder ground by the grinding machine is subjected to reselection, magnetic separation and dehydration tank screening in sequence, and the granularity of the ore powder is effectively screened, so that the finally obtained ore concentrate has more uniform and consistent granularity when the component content meets the requirements and standards, the uniformity of the finally prepared iron ore concentrate standard sample meets the requirements and standards, the component content deviation of each iron ore concentrate standard sample is small when multiple sampling is carried out, the iron and steel quality detection work is further facilitated, and the result is more real and accurate. In addition, after the dried concentrate is mixed for many times, the uniformity of the concentrate is better, the uniformity of the finally prepared iron concentrate standard sample is further ensured, and the accuracy of the detection result is ensured.
Wherein, in the crushing step, a three-stage crushing method is adopted. Compared with the first-stage crushing mode and the second-stage crushing mode, the three-stage crushing method has the advantages that the raw ore is crushed more sufficiently, the crushed ore powder is more uniform and fine, the size uniformity of the crushed raw ore particles is guaranteed, the size deviation is small, the subsequent ore grinding work is favorably and smoothly carried out, and the condition that the grinding efficiency of a grinding machine is reduced and the ore grinding effect is influenced due to the fact that the size difference of the raw ore particles is large is avoided.
In the drying step, the drying temperature is 105 ℃ and the drying time is 8 hours. By adopting proper drying temperature and drying time, the concentrate can be fully dried, and the moisture content in the dried concentrate can meet the relevant standards and use requirements.
In the above sample preparation step, the sample prepared at one time has a weight of 100kg, and is stored in 1000 bottles of 100g per bottle. The standard iron ore concentrate samples are respectively filled into 1000 bottles, so that the randomness of selecting the standard iron ore concentrate samples is guaranteed, the result after detection is guaranteed to be more fair and accurate, and the quality detection work of steel is facilitated.
The invention will now be further illustrated with reference to specific examples, which are not intended to limit the scope of the invention.
Example 1
The preparation method comprises the following steps: 1) raw ore screening: and screening the raw ore to meet the design requirement of the iron ore concentrate components. 2) Crushing: and (4) crushing the screened raw ore by adopting a three-stage crushing method. 3) Grinding: and putting the crushed raw ore into a mill for grinding. 4) And (3) reselection: and (4) adopting a gravity separation method to carry out rough separation on the ground raw ore. 5) Secondary grinding: and (4) placing the reselected raw ore into a mill for secondary grinding. 6) Magnetic separation: and (4) selecting the raw ore subjected to secondary grinding by adopting a magnetic separation method to obtain the concentrate. 7) And (3) dehydration treatment: and (4) putting the concentrate subjected to magnetic separation into a dewatering tank to finish concentration, and performing primary dewatering treatment on the concentrate. 8) And (3) filtering: and filtering the concentrated concentrate to further remove water in the concentrate. 9) Drying: and drying the filtered concentrate, wherein the drying temperature is 105 ℃, and the drying time is 8 hours. 10) Screening: and screening the dried concentrate, and selecting the concentrate with the granularity of more than or equal to 180 meshes. 11) Preparing a sample: and (3) uniformly mixing the screened qualified concentrate for multiple times, and filling the mixture into bottles, wherein the weight of the sample prepared at one time is 100kg, the sample is contained in 1000 bottles, and each bottle contains 100g of the sample, so that a finished product is obtained.
The specific component ratio of the detection is shown in table 1.
Table 1:
example 2
The iron ore concentrate standard sample in the example 1 is subjected to a particle size segregation test, the sample in the example 1 is divided into three screening sections, and the three screening sections are respectively analyzed, wherein specific analysis data are shown in table 2.
Table 2: analytical data sheet of example 1
As can be seen from the above table, the three screen sections in example 1 have slightly segregated contents of components with different particle sizes, and the standard sample of the iron ore concentrate has good uniformity. And by detecting the metallic iron in the iron concentrate standard sample,
fe0.31%, which indicates that the content of metallic iron in the sample is low, and the uniformity and the stability of the standard sample cannot be influenced.
The standard iron ore concentrate sample is detected by eight qualified laboratories by adopting different methods, and data are subjected to mathematical statistics and fixed values by a Grabbs criterion, a Cocker criterion and a Chariro-Wilson method, so that the uniformity is good.
Example 3
The iron concentrate standard sample of example 1 was subjected to stability testing, see table 5.
Table 5: stability review Table for example 1
As can be seen from the above table, the differences between the detected value and the recommended value of example 1 are each less than or equal to the extended uncertainty of the standard value, i.e. | xCRM-xmeanAnd the stability is considered to be good if | < U.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (5)
1. The iron ore concentrate standard sample is characterized by comprising 25.0 to 30.0 weight percent of FeO and SiO23.0-7.0％，Al2O30.05-0.2％，CaO 0.1-0.5％，MgO 0.1-0.5％，MnO0.03-0.08％，TiO20.01-0.05%, P0.005-0.02%, S0.01-0.2%, and the rest is TFe.
2. The method for preparing the standard sample of the iron ore concentrate as set forth in claim 1, which is characterized by comprising the following steps:
raw ore screening: screening raw ores to meet the design requirements of iron ore concentrate components;
crushing: crushing the screened raw ore;
grinding: putting the crushed raw ore into a mill for grinding;
and (3) reselection: coarse dressing the ground raw ore by adopting a gravity separation method;
secondary grinding: placing the reselected raw ore into a mill for secondary grinding;
magnetic separation: selecting the raw ore subjected to secondary grinding by adopting a magnetic separation method to obtain concentrate;
and (3) dehydration treatment: placing the concentrate subjected to magnetic separation into a dewatering tank to finish concentration work, and performing primary dewatering treatment on the concentrate;
and (3) filtering: filtering the concentrated concentrate to further remove water in the concentrate;
drying: drying the filtered concentrate;
screening: screening the dried concentrate, and selecting the concentrate with the granularity of more than or equal to 180 meshes;
preparing a sample: and (4) uniformly mixing the screened qualified concentrate for multiple times, and then filling the mixture into a bottle.
3. The method for preparing the standard sample of the iron ore concentrate according to claim 2, wherein the crushing step adopts a three-stage crushing method.
4. The method for preparing the standard sample of the iron ore concentrate according to claim 2, wherein in the drying step, the drying temperature is 105 ℃ and the drying time is 8 hours.
5. The method for preparing the standard sample of the iron ore concentrate according to claim 2, wherein in the step of preparing the sample, the sample prepared at one time has a weight of 100kg and is divided into 1000 bottles of 100g per bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010095545.0A CN111289320A (en) | 2020-02-17 | 2020-02-17 | Iron ore concentrate standard sample and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010095545.0A CN111289320A (en) | 2020-02-17 | 2020-02-17 | Iron ore concentrate standard sample and preparation method thereof |
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Citations (6)
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|---|---|---|---|---|
| US20040081603A1 (en) * | 2001-01-24 | 2004-04-29 | Bittencourt Julio Cesar | Beneficiation process for concentration/calcination of zinc silicate ores minerales |
| AU2008100427A4 (en) * | 2008-03-05 | 2008-07-03 | Central South Univeristy | Efficient separation method for low grade complex iron ore |
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2020
- 2020-02-17 CN CN202010095545.0A patent/CN111289320A/en active Pending
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| Title |
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Application publication date: 20200616 |