CN106769661A - The evaluation method of iron ore powder Liquid phase flowability - Google Patents
The evaluation method of iron ore powder Liquid phase flowability Download PDFInfo
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- CN106769661A CN106769661A CN201611013108.XA CN201611013108A CN106769661A CN 106769661 A CN106769661 A CN 106769661A CN 201611013108 A CN201611013108 A CN 201611013108A CN 106769661 A CN106769661 A CN 106769661A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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Abstract
The present invention discloses a kind of evaluation method of iron ore powder Liquid phase flowability, and it includes：CaO reagents and Iron Ore Powder are made smaller than the powder of 100 mesh by milling apparatus respectively；CaO powder and Iron Ore Powder powder are mixed by proportioning in uniform mixing equipment according to default basicity；The powder of mixing is made cylindrical specimens little cake in pressure-like equipment；Sample little cake is placed in agglomerating plant and is sintered experiment；The area after temperature and the flowing of sample little cake when the minimum liquid phase for recording the sample little cake of same basicity flows；Determine area after the liquid phase flowing of different temperatures of the sample little cake of same basicity and record；Determine the area after the sample little cake liquid phase flowing of different basicity and record；Flow index is calculated by formula：The Liquid phase flowability of Iron Ore Powder is evaluated according to slamp value.The method can simultaneously determine Liquid phase flowability index of the different Iron Ore Powders under different temperatures and different basicity, and then Yield and quality to improving sintering deposit has great importance.
Description
Technical field
The present invention relates to sintering technology field, more particularly to a kind of evaluation method of iron ore powder Liquid phase flowability.
Background technology
Sintering deposit is the main materials of blast furnace, and the performance of sintering deposit, largely again by its main materials-iron ore
The performance of stone flour is determined.For a long time, research of the people to sintering iron ore self-characteristic used only reside within chemistry into
Point, granularmetric composition, granulation property etc. normal temperature aspect of performance.High temperature performance and its Effect study to it in sintering process is very few.
But in recent years, the high-temperature behavior of Iron Ore Powder is gradually taken seriously, because Iron Ore Powder high-temperature behavior can directly reflect it in sintering deposit
In behavior and performance.
What the consolidation of sintering deposit was mainly infiltrated to the non-fusant material of surrounding by the liquid phase for generating, and reacted, and bonded and complete.
Research shows:The structural strength of sintering deposit is not only decided by remain the self-strength of raw ore and Binder Phase, additionally depend on both it
Between exposure level.Suitable sintering Liquid phase flowability, it can be ensured that solid-liquid contact area, so as to be conducive to obtaining enough consolidations
Intensity.
Iron Ore Powder liquid phase refers to the energy of flow of the liquid phase in iron ore powder in sintering process and Cao reaction generations
Power, what it was characterized is Binder Phase " effectively bonding scope ".Different types of Iron Ore Powder is being sintered due to the difference of self-characteristic
During generate liquid phase flow behavior it is also different；The stream of the liquid phase that same class Iron Ore Powder is generated under different basicity
Dynamic characteristic is also different, therefore, it can the mobility by controlling sintering liquid phase with ore deposit design, grasps the liquid phase stream of each Iron Ore Powder
Dynamic characteristic has great importance to the Yield and quality for improving sintering deposit.
The content of the invention
In view of this, the present invention provides a kind of evaluation method of iron ore powder Liquid phase flowability.
The present invention provides a kind of evaluation method of iron ore powder Liquid phase flowability, and it is comprised the following steps：
Step a, the powder that CaO reagents and Iron Ore Powder are made smaller than 100 mesh by milling apparatus respectively；
The default basicity of step b, basis is mixed CaO powder and Iron Ore Powder powder by proportioning in uniform mixing equipment；
Step c, the powder of mixing is made cylindrical specimens little cake in pressure-like equipment, and records the sample little cake
Original area and diameter；
Step d, the sample little cake is placed in agglomerating plant it is sintered experiment；
The area after temperature and the flowing of sample little cake when the minimum liquid phase for recording the sample little cake of same basicity flows；
Area of the sample little cakes of same basicity after the liquid phase of different temperatures flows is determined with 10~20 DEG C of step-length and is remembered
Record；
Determine the area after the sample little cake liquid phase flowing of different basicity and record；
Step e, flow index is calculated by equation below：
Wherein, d0It is the green diameter of sample little cake, d1It is the diameter after the flowing of sample little cake liquid phase；
Step f, the slamp value calculated according to step e evaluate the Liquid phase flowability of Iron Ore Powder.
Further, in the step c, the height of sample little cake is 5 ± 0.1mm, a diameter of 0.8cm.
Further, in the step d：With in a sintering experiment, 10 groups of sample little cakes are carried out into corresponding sintering real
Test, average diameter is gone out according to the areal calculation after the flowing of each sample little cake liquid phase.
Further, the step f is specifically included：
Minimum liquid phase flowing temperature and different temperatures slamp value block diagram are drawn according to data；
The Liquid phase flowability of Iron Ore Powder is evaluated according to the block diagram.
The present invention provides a kind of evaluation method of iron ore powder Liquid phase flowability, and the evaluation method can simultaneously determine difference
Liquid phase flowability index of the Iron Ore Powder under different temperatures and different basicity, then evaluates Iron Ore Powder, and then to improving
The Yield and quality of sintering deposit has great importance.And above-mentioned evaluation method is easy to operate, it is easy to accomplish.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described.
Fig. 1 is the minimum liquid phase flowing temperature block diagram of different Iron Ore Powders；
Fig. 2 is the flow index block diagram under different Iron Ore Powder different temperatures.
Specific embodiment
The invention discloses a kind of evaluation method of iron ore powder Liquid phase flowability, those skilled in the art can use for reference this
Literary content, is suitably modified technological parameter realization.In particular, all similar replacements and change are to art technology
It is it will be apparent that they are considered as being included in the present invention for personnel.The method of the present invention and application have passed through preferably
Embodiment is described, and related personnel can be not substantially being departed from present invention, spirit and scope to side as herein described
Method and application are modified or suitably change is realized and apply the technology of the present invention with combining.
The present invention provides a kind of evaluation method of iron ore powder Liquid phase flowability, and it is comprised the following steps：
Step a, the powder that CaO reagents and Iron Ore Powder are made smaller than 100 mesh by milling apparatus respectively；
The default basicity of step b, basis is mixed CaO powder and Iron Ore Powder powder by proportioning in uniform mixing equipment；
Step c, the powder of mixing is made cylindrical specimens little cake in pressure-like equipment, and records the sample little cake
Original area and diameter；
Step d, the sample little cake is placed in agglomerating plant it is sintered experiment；
The area after temperature and the flowing of sample little cake when the minimum liquid phase for recording the sample little cake of same basicity flows；
Area of the sample little cakes of same basicity after the liquid phase of different temperatures flows is determined with 10~20 DEG C of step-length and is remembered
Record；
Determine the area after the sample little cake liquid phase flowing of different basicity and record；
Step e, flow index is calculated by equation below：
Wherein, d0It is the green diameter of sample little cake, d1It is the diameter after the flowing of sample little cake liquid phase；
Step f, the slamp value calculated according to step e evaluate the Liquid phase flowability of Iron Ore Powder.
The method that the present invention is provided can simultaneously determine liquid phase stream of the different Iron Ore Powders under different temperatures and different basicity
Dynamic sex index, then evaluates Iron Ore Powder.
Preferably, in the step c, the height of sample little cake is 5 ± 0.1mm, a diameter of 0.8cm.
Further, in the step d：With in a sintering experiment, 10 groups of sample little cakes are carried out into corresponding sintering real
Test, average diameter is gone out according to the areal calculation after the flowing of each sample little cake liquid phase.The average diameter is above-mentioned d1。
In order to more intuitively evaluate Iron Ore Powder Liquid phase flowability, the step f is specifically included：
Minimum liquid phase flowing temperature and different temperatures slamp value block diagram are drawn according to data；
The Liquid phase flowability of Iron Ore Powder is evaluated according to the block diagram.
With reference to embodiment, the present invention is expanded on further：
Embodiment
The 1st, CaO reagents and Iron Ore Powder are made smaller than the powder of 100 mesh by milling apparatus respectively；
2nd, CaO powder and Iron Ore Powder powder are mixed by proportioning in uniform mixing equipment according to default basicity；
3rd, the powder of mixing is made 10 cylindrical specimens little cakes in pressure-like equipment, the height of sample little cake for 5 ±
0.1mm, diameter d0It is 0.8cm；
Step d, the sample little cake is placed in agglomerating plant it is sintered experiment；
After temperature and the flowing of sample little cake when S1, the minimum liquid phase of 10 sample little cakes for recording same basicity flow
Area, average diameter is gone out according to above-mentioned areal calculation；
S2, the area with 20 DEG C of 10 sample little cakes of the same basicity of measure of step-length after the liquid phase of different temperatures flows simultaneously are remembered
Record, average diameter is gone out according to above-mentioned areal calculation；
S3, determine the area after sample little cake (each basicity sample little cake 10) liquid phase flowing of different basicity and remember
Record, average diameter is gone out according to above-mentioned areal calculation；
4th, flow index is calculated by equation below：
Wherein, d0It is the green diameter of sample little cake, d1It is the average diameter after the flowing of sample little cake liquid phase；
Above-mentioned Iron Ore Powder is followed successively by ore deposit A, ore deposit B, ore deposit C, ore deposit D, ore deposit E, ore deposit F；
Above-mentioned six kinds of Iron Ore Powders its chemical compositions is shown in Table 1：
1 above-mentioned six kind of chemical composition of Iron Ore Powder of table
| Iron Ore Powder | TFe | FeO | SiO2 | Al2O3 | CaO | MgO | P | S | Ig |
| Ore deposit A | 60.22 | ＜ 0.5 | 4.64 | 2.39 | ＜ 0.1 | 0.06 | 0.1 | 0.021 | 6.41 |
| Ore deposit B | 60.99 | ＜ 0.5 | 4.06 | 2.48 | ＜ 0.1 | 0.06 | 0.11 | 0.03 | 5.89 |
| Ore deposit C | 57.87 | 2.42 | 4.58 | 1.39 | 0.15 | 0.2 | 0.05 | 0.08 | 10.0 |
| Ore deposit D | 62.34 | ＜ 0.5 | 4.56 | 2.28 | ＜ 0.1 | 0.06 | 0.11 | 0.034 | 3.54 |
| Ore deposit E | 58.07 | ＜ 0.5 | 5.26 | 2.71 | 0.09 | 0.06 | 0.07 | 0.035 | 7.4 |
| Ore deposit F | 61.58 | ＜ 0.5 | 4.85 | 1.7 | 0.17 | 0.07 | 0.06 | 0.048 | 4.32 |
Test result is listed in table 2 to table 4
Minimum liquid phase flowing temperature and slamp value of the different Iron Ore Powders of table 2 in same basicity
| Iron Ore Powder | Dual alkalinity | Minimum liquid phase flowing temperature, DEG C | Average diameter, cm | Slamp value |
| Ore deposit A | 4.0 | 1240 | 1.08 | 0.83 |
| Ore deposit B | 4.0 | 1250 | 1.17 | 1.15 |
| Ore deposit C | 4.0 | 1230 | 1.11 | 0.93 |
| Ore deposit D | 4.0 | 1240 | 1.07 | 0.79 |
| Ore deposit E | 4.0 | 1220 | 1.1 | 0.9 |
The different Iron Ore Powders of table 2 slamp value at different temperatures
Slamp value of the Iron Ore Powder of table 4 under different basicity
According to table 2 to table 4, the different minimum liquid phase flowing temperature block diagrams of Iron Ore Powder are drawn, refer to Fig. 1；Draw different
Flow index block diagram under Iron Ore Powder different temperatures, refers to Fig. 2.
According to table 2 to 4, and Fig. 1 and Fig. 2, evaluation is made to Iron Ore Powder.
Show that evaluation is as follows according to Fig. 1：
Slamp value is in (0.6~1.2) in five kinds of Iron Ore Powders, and the minimum liquid phase flowing temperature of ore deposit E is minimum；
The liquid phase cold flow point of five kinds of Iron Ore Powders put in order for：Ore deposit E<Ore deposit C<Ore deposit A<Ore deposit D<Ore deposit B；
Show that evaluation is as follows according to Fig. 2：
The mobility size of 1250 DEG C of five kinds of Iron Ore Powders is arranged as：Ore deposit D<Ore deposit B<Ore deposit A<Ore deposit C<Ore deposit E；
The mobility size of 1260 DEG C of five kinds of Iron Ore Powders is arranged as：Ore deposit B<Ore deposit D<Ore deposit A<Ore deposit C<Ore deposit E；
The mobility size of 1280 DEG C of five kinds of Iron Ore Powders is arranged as：Ore deposit B<Ore deposit D<Ore deposit C<Ore deposit E<Ore deposit A；
Show that evaluation is as follows according to table 4：
Liquid phase flowing temperature of ore deposit F Iron Ore Powders when respectively in dual alkalinity 3.0,3.5,4.0,5.0 be 1260 DEG C, 1240
℃、1190℃、1150℃；
Ore deposit F Iron Ore Powders constantly decline with the increase liquid phase flowing temperature of basicity, and temperature is substantially aggravated after basicity is more than 4.0
Decline.
As shown in the above, the evaluation method that the present invention is provided can simultaneously determine different Iron Ore Powders in different temperatures and
Liquid phase flowability index under different basicity, then evaluates Iron Ore Powder, and then to improving the Yield and quality tool of sintering deposit
There is important meaning.And above-mentioned evaluation method is easy to operate, it is easy to accomplish.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of evaluation method of iron ore powder Liquid phase flowability, it is characterised in that comprise the following steps：
Step a, the powder that CaO reagents and Iron Ore Powder are made smaller than 100 mesh by milling apparatus respectively；
The default basicity of step b, basis is mixed CaO powder and Iron Ore Powder powder by proportioning in uniform mixing equipment；
Step c, the powder of mixing is made cylindrical specimens little cake in pressure-like equipment, and records the original of the sample little cake
Area and diameter；
Step d, the sample little cake is placed in agglomerating plant it is sintered experiment；
The area after temperature and the flowing of sample little cake when the minimum liquid phase for recording the sample little cake of same basicity flows；
Area of the sample little cakes of same basicity after the liquid phase of different temperatures flows is determined with 10~20 DEG C of step-length and is recorded；
Determine the area after the sample little cake liquid phase flowing of different basicity and record；
Step e, flow index is calculated by equation below：
Wherein, d0It is the green diameter of sample little cake, d1It is the diameter after the flowing of sample little cake liquid phase；
Step f, the slamp value calculated according to step e evaluate the Liquid phase flowability of Iron Ore Powder.
2. it is according to claim 1 evaluate iron ore powder Liquid phase flowability experimental technique, it is characterised in that the step
In c, the height of sample little cake is 5 ± 0.1mm, a diameter of 0.8cm.
3. according to the experimental technique of the evaluation iron ore powder Liquid phase flowability described in claim 1, it is characterised in that the step d
In：With in a sintering experiment, 10 groups of sample little cakes are carried out into corresponding sintering experiment, flowed according to each sample little cake liquid phase
Areal calculation afterwards goes out average diameter.
4. it is according to claim 1 evaluate iron ore powder Liquid phase flowability experimental technique, it is characterised in that the step
F is specifically included：
Minimum liquid phase flowing temperature and different temperatures slamp value block diagram are drawn according to data；
The Liquid phase flowability of Iron Ore Powder is evaluated according to the block diagram.
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Cited By (6)
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| CN107576757A (en) * | 2017-08-10 | 2018-01-12 | 包头钢铁（集团）有限责任公司 | A kind of sintering magnesian flux and the evaluation method of iron ore reactivity worth |
| CN107782596A (en) * | 2017-10-24 | 2018-03-09 | 武汉钢铁有限公司 | The making of Cavitated sample and method of testing after more than 5mm iron ore sinterings |
| CN107796734A (en) * | 2017-10-16 | 2018-03-13 | 首钢集团有限公司 | A kind of method of testing of Iron Ore Powder adhesive property |
| CN111579383A (en) * | 2020-04-22 | 2020-08-25 | 包头钢铁（集团）有限责任公司 | Evaluation method of iron ore powder continuous crystallization performance |
| CN112414898A (en) * | 2020-11-10 | 2021-02-26 | 中国农业科学院农产品加工研究所 | Method for evaluating mixing uniformity of composite powder |
| CN112694322A (en) * | 2021-01-28 | 2021-04-23 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
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| CN112414898A (en) * | 2020-11-10 | 2021-02-26 | 中国农业科学院农产品加工研究所 | Method for evaluating mixing uniformity of composite powder |
| CN112694322A (en) * | 2021-01-28 | 2021-04-23 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN112694322B (en) * | 2021-01-28 | 2023-11-10 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
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