CN113960244A - Method for measuring content of montmorillonite in metallurgical pellets - Google Patents
Method for measuring content of montmorillonite in metallurgical pellets Download PDFInfo
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- CN113960244A CN113960244A CN202111176897.XA CN202111176897A CN113960244A CN 113960244 A CN113960244 A CN 113960244A CN 202111176897 A CN202111176897 A CN 202111176897A CN 113960244 A CN113960244 A CN 113960244A
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- 239000008188 pellet Substances 0.000 title claims abstract description 41
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052901 montmorillonite Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910052742 iron Inorganic materials 0.000 claims abstract description 36
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229960000907 methylthioninium chloride Drugs 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 29
- 230000005291 magnetic effect Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000000696 magnetic material Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000003302 ferromagnetic material Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 12
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 238000004448 titration Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 9
- 238000002441 X-ray diffraction Methods 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 4
- 235000012216 bentonite Nutrition 0.000 description 3
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000002734 clay mineral Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- VMGAPWLDMVPYIA-HIDZBRGKSA-N n'-amino-n-iminomethanimidamide Chemical compound N\N=C\N=N VMGAPWLDMVPYIA-HIDZBRGKSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- BOLDJAUMGUJJKM-LSDHHAIUSA-N renifolin D Natural products CC(=C)[C@@H]1Cc2c(O)c(O)ccc2[C@H]1CC(=O)c3ccc(O)cc3O BOLDJAUMGUJJKM-LSDHHAIUSA-N 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- GXGJIOMUZAGVEH-UHFFFAOYSA-N Chamazulene Chemical group CCC1=CC=C(C)C2=CC=C(C)C2=C1 GXGJIOMUZAGVEH-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
- G01N31/162—Determining the equivalent point by means of a discontinuity
- G01N31/164—Determining the equivalent point by means of a discontinuity by electrical or electrochemical means
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a method for measuring the content of montmorillonite in metallurgical pellets. The method comprises the following steps: (1) taking 10.0g of iron materials at different parts in the metallurgical pellet iron material respectively; (2) adding 100ml of water respectively; (3) heating to 100 deg.C in a heating device and maintaining the temperature for 10 min; (4) cooling the heated metallurgical pellet iron material water solution to room temperature, and sucking out iron in the solution by using a magnetic material; (5) and (3) dropwise adding methylene blue with the mass fraction of 0.2% into the solution obtained in the step (4) by using a burette, measuring the electric conductivity after stirring by using a magnetic stirrer until the third obvious increase of the electric conductivity caused by each unit amount of the methylene blue is achieved, and recording the total addition amount Tforma of the methylene blue. The method relies on data support, so that the titration end point is convenient to judge; the required reagent and equipment are less, and the cost is relatively low; the method is simple to operate and can be used for rapid and effective measurement.
Description
Technical Field
The invention relates to the technical field of metallurgical pellet binders, in particular to a method for determining the content of montmorillonite in metallurgical pellets.
Background
Montmorillonite is used as the main component of the bentonite pellet binder, and has the main function of pelletizing the mineral powder, so that the mineral powder with low utilization rate can be better and fully utilized.
In order to ensure that the metallurgical pellets have the same properties, the binder in the pellets needs to be uniformly distributed.
The existing main methods for measuring the content of montmorillonite in metallurgical pellets comprise the following steps:
first, X-ray diffraction spectroscopy can be used;
second, after dispersing the sample with sodium phosphate, the sample was titrated with methylene blue and visually observed for the presence of a light green halo around the dark blue spot in the center of the titration.
However, the existing technology for measuring the content of montmorillonite in metallurgical pellets has the following great defects:
firstly, the operation is complex, and the rapid and effective measurement is difficult;
secondly, in the measurement, more reagents and equipment are needed, and the cost is relatively high;
thirdly, when the end point is measured, the color difference is difficult to distinguish; it is difficult to judge that the end point is reached.
Disclosure of Invention
The invention provides a method for measuring the montmorillonite content in metallurgical pellets aiming at the defects in the existing method for measuring the montmorillonite content in metallurgical pellets.
In order to achieve the purpose, the technical scheme adopted by the invention is a method for measuring the content of montmorillonite in metallurgical pellets, and the method comprises the following steps:
(1) taking 10.0g of iron materials at different parts in the metallurgical pellet iron material containing the montmorillonite adhesive;
(2) adding 100ml of water into the iron materials at different positions respectively;
(3) heating to 100 deg.C in a heating device and maintaining the temperature for 10 min;
(4) cooling the heated metallurgical pellet iron material water solution to room temperature, and sucking out iron in the solution by using a magnetic material;
(5) dropwise adding methylene blue with the mass fraction of 0.2% into the solution obtained in the step (4) by using a burette, measuring the conductance after stirring for a certain time by using a magnetic stirrer at a certain rotating speed until the third time of the conductance increase caused by each unit amount of the methylene blue is obviously increased, and recording the total addition amount Tjia of the methylene blue; the montmorillonite content of the metallurgical pellet iron material containing the montmorillonite adhesive is reflected by the finally measured total addition amount Tforma of methylene blue.
According to an embodiment of the invention, the magnetic material is a material of a ferromagnetic element comprising iron, cobalt, nickel.
According to the embodiment of the invention, the increase of the conductance in the step (5) refers to the increase of the conductance after and before the dropwise addition of every 0.5ml of methylene blue.
According to the embodiment of the invention, the unit amount of the methylene blue solution in the step (5) is 1ml, 0.5ml and 0.1ml according to the requirement of experimental precision.
According to the embodiment of the invention, in the step (5), the rotation speed of the magnetic stirrer is 500rpm, 800rpm, 1000rpm, 1200rpm and 1500rpm, and the stirring time is 1min, 2min and 5 min.
The working principle of the method for measuring the content of the montmorillonite in the metallurgical pellet is as follows:
(1) the main component bentonite of the montmorillonite binder is a clay mineral which takes montmorillonite as a main component, and the clay mineral has the capability of adsorbing methylene blue;
(2) the main components of the metallurgical pellets are iron powder and a binder; the iron powder has magnetic properties, while the binder does not. The magnetic substance can completely separate the iron powder from the binder; analyzing the concentration of iron ions in the water by using an iron ion analyzer, and if the concentration is lower than 1ppm, the iron powder and the binder can be considered to be completely separated;
(3) the temperature is raised, and the heat preservation is beneficial to separating the metallurgical pellets in pure water;
(4) the electrical conductance of the binder and methylene blue in water is greatly different.
The total addition amount Tforma of methylene blue measured at different parts can also reflect the uniform distribution degree of montmorillonite in the metallurgical pellets.
The montmorillonite adhesive refers to various bentonites.
When the magnetism of the metallurgical pellet iron material is stronger, a material with weaker magnetism can be used; when the magnetism of the iron material of the metallurgical pellet is weaker, a material with stronger magnetism can be used.
The magnetic strength standard of the metallurgical pellet iron material is that the iron grade is 60 percent, and the magnetic strength distinguishing standard of the magnetic material is 60 mT.
The method for determining the montmorillonite content in the metallurgical pellets has the following advantages:
(1) compared with the prior art which relies on the naked eye to observe chromatic aberration, the method relies on data support, and is convenient for judging the titration end point;
(2) the required reagent and equipment are less, and the cost is relatively low;
(3) the method is simple to operate and can be used for rapid and effective measurement.
Drawings
FIG. 1 shows the total amount Tformazan of methylene blue added at measurement point 1 of example.
FIG. 2 shows the total amount Tformazan of methylene blue added at measurement point 2 in example one.
FIG. 3 shows the average content of total addition Tformazan of methylene blue in the examples.
FIG. 4 shows X-ray diffraction spectroscopy measurements of one embodiment.
FIG. 5 shows the total amount of methylene blue added Tforma at measurement point 1 in example two.
FIG. 6 shows the total amount of methylene blue added Tforma at measurement point 2 in example two.
FIG. 7 shows the average content of total added amount Tformazan of dimethylene blue in example.
FIG. 8 shows the X-ray diffraction spectroscopy measurement values of the second example.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The first embodiment is as follows: a method for measuring the montmorillonite content in metallurgical pellets comprises the following steps:
(1) taking 10.0g of iron materials at different parts in the metallurgical pellet iron material containing the montmorillonite adhesive;
(2) adding the iron material obtained in the step (1) into a 250ml beaker, and adding 100ml of water;
(3) adding the product obtained in the step (2) into an phase heating device, heating to 100 ℃, and preserving heat for 10 min;
(4) cooling the metallurgical pellet iron material aqueous solution containing the montmorillonite adhesive obtained in the step (3) to room temperature, and then completely removing iron in the solution by using a magnetic material;
(5) and (3) dropwise adding methylene blue with the mass fraction of 0.2% into the solution obtained in the step (4) by using a burette, measuring the conductance after stirring the solution for 2min at the rotating speed of 1000rpm by using a magnetic stirrer until the third obvious increase of the conductance caused by each unit amount of the methylene blue is achieved, and recording the total addition amount Tjia of the methylene blue.
The measuring range of the conductivity meter is 0-2000 mu s/cm.
The montmorillonite content of the metallurgical pellet iron material containing the montmorillonite adhesive is reflected by the finally measured total addition amount Tforma of methylene blue.
May also be reflected in the content M formazan.
The results of the examples are shown in FIGS. 1, 2 and 3, where T nails were 20 ml. + -. 2 at different sites and were considered to be uniformly distributed.
M nail =77.2% was calculated according to the formula.
The detection result of the X-ray diffraction spectrum method is 77.44 percent, which is similar to the measurement result of the invention.
1. Example two: a method for measuring the montmorillonite content in metallurgical pellets comprises the following steps:
(1) taking 10.0g of iron materials at different parts in the metallurgical pellet iron material containing the montmorillonite adhesive;
(2) adding the iron material obtained in the step 1 into a 250ml beaker, and adding 100ml of water;
(3) adding the product obtained in the step 2 into a phase heating device, heating to 100 ℃, and preserving heat for 10 min;
(4) cooling the metallurgical pellet iron material aqueous solution containing the montmorillonite adhesive obtained in the step 3 to room temperature, and then completely removing iron in the solution by using a magnetic material;
(5) and (3) dropwise adding methylene blue into the solution obtained in the step (4) by using a burette, measuring the electric conductivity after stirring for 5min at the rotating speed of 800rpm by a magnetic stirrer until the third obvious increase of the electric conductivity caused by every 1ml of methylene blue is achieved, and recording the total addition amount Tforma of the methylene blue.
The measuring range of the conductivity meter is 0-2000 mu s/cm.
The montmorillonite content of the metallurgical pellet iron material containing the montmorillonite adhesive is reflected by the finally measured total addition amount Tforma of methylene blue.
May also be reflected in the content M formazan.
The results of the second example are shown in FIGS. 4, 5 and 6, and T nails at different sites were 18 ml. + -. 1, and the distribution was considered to be uniform.
M nail =69.70% was calculated according to the formula.
The detection result of the X-ray diffraction spectrum method is 69.24 percent, which is similar to the measurement result of the invention.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A method for measuring the montmorillonite content in metallurgical pellets is characterized by comprising the following steps:
(1) taking 10.0g of iron materials at different parts in the metallurgical pellet iron material containing the montmorillonite adhesive;
(2) adding 100ml of water into the iron materials at different positions respectively;
(3) heating to 100 deg.C in a heating device and maintaining the temperature for 10 min;
(4) cooling the heated metallurgical pellet iron material water solution to room temperature, and sucking out iron in the solution by using a magnetic material;
(5) dropwise adding methylene blue with the mass fraction of 0.2% into the solution obtained in the step (4) by using a burette, measuring the conductance after stirring for a certain time by using a magnetic stirrer at a certain rotating speed until the third time of the conductance increase caused by each unit amount of the methylene blue is obviously increased, and recording the total addition amount Tjia of the methylene blue; the montmorillonite content of the metallurgical pellet iron material containing the montmorillonite adhesive is reflected by the finally measured total addition amount Tforma of methylene blue.
2. The method of claim 1, wherein the magnetic material is a ferromagnetic material containing iron, cobalt, and nickel.
3. The method for determining the montmorillonite content in the metallurgical pellet as claimed in claim 1, wherein the conductivity increase in step (5) is the conductivity increase after and before every 0.5ml of methylene blue is added.
4. The method for determining the montmorillonite content in the metallurgical pellets according to claim 1, wherein the unit amount of the methylene blue solution in the step (5) is 1ml, 0.5ml or 0.1ml according to the experimental precision requirement.
5. The method for determining the montmorillonite content in the metallurgical pellet as claimed in claim 1, wherein the rotation speed of the magnetic stirrer in the step (5) is 500rpm, 800rpm, 1000rpm, 1200rpm, 1500rpm, and the stirring time is 1min, 2min, 5 min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114924028A (en) * | 2022-04-29 | 2022-08-19 | 马鞍山钢铁股份有限公司 | Method for determining binder distribution uniformity in iron ore concentrate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114924028A (en) * | 2022-04-29 | 2022-08-19 | 马鞍山钢铁股份有限公司 | Method for determining binder distribution uniformity in iron ore concentrate |
| CN114924028B (en) * | 2022-04-29 | 2024-04-26 | 马鞍山钢铁股份有限公司 | Method for measuring binder distribution uniformity in iron ore concentrate |
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