CN105716989A - Device and method for determining water retention and permeation characteristics of porous packed bed layer - Google Patents
Device and method for determining water retention and permeation characteristics of porous packed bed layer Download PDFInfo
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- CN105716989A CN105716989A CN201610225619.1A CN201610225619A CN105716989A CN 105716989 A CN105716989 A CN 105716989A CN 201610225619 A CN201610225619 A CN 201610225619A CN 105716989 A CN105716989 A CN 105716989A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims description 55
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 29
- 229910052742 iron Inorganic materials 0.000 claims description 27
- 229920006395 saturated elastomer Polymers 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 10
- 238000003556 assay Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 5
- 230000000274 adsorptive effect Effects 0.000 claims description 4
- 229920005479 Lucite® Polymers 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 12
- 238000005469 granulation Methods 0.000 abstract description 7
- 230000003179 granulation Effects 0.000 abstract description 7
- 238000005245 sintering Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract 4
- 239000000523 sample Substances 0.000 description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005453 pelletization Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
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Abstract
The invention discloses a device and a method for determining water retention and permeation characteristics of a porous packed bed layer. The device comprises an outer frame, a computer, a second electronic balance, a water tank, a beaker, a first electronic balance, a suspension part, a suspension drum and a sample drum, wherein the computer, the second electronic balance and the water tank are located outside the outer frame; the beaker, the first electronic balance, the suspension part, the suspension drum and the sample drum are located in the outer frame. According to the method, the action that a sintering mixture is sprayed and wetted with water in granulating production can be really and reasonably reflected, and water-adding regulation in an actual granulation process is more facilitated according to determined parameters of the water retention and permeation characteristics.
Description
Technical field
The invention belongs to and porous filling bed material is made water retention characteristic and Permeable characteristic mensuration and analysis technical field, be specifically related to a kind of porous and pile up determinator and the assay method thereof of bed water holding and Permeable characteristic.
Background technology
The granulation of sinter mixture is one of key link providing High-quality Sinters to blast furnace, and the energy consumption of agglomeration for iron mine, yield and quality are had very significant impact.The pellet performances such as the intensity of granulation appropriate aqueous amount, quasi-granule of granulating in Iron Ore Powder pelletization are had a great impact by the water holding of material and Permeable characteristic.Regulation and control granulation amount of water, optimize granulate add water strategy become optimize granulating sinter mixture effect important measures.In steel enterprise sintering production practices, experienced operator by perusal or pinch the feel of touch judge technological parameter (water content of particularly granulating) whether rationally, evaluate the quality of mixture granulation result.Under complicated material condition, rely on the high level manipulation that artificial experience is implemented Iron Ore Powder is granulated very difficult often.Due to the rare and high cost of iron ore powder sintering process expertise, simultaneously in order to ensure that the stable of SINTERING PRODUCTION is with efficiently, intelligent production of sinter mixture dispensing with granulation has been carried out many probing into by production operator and researcher.In Iron Ore Powder pelletization, the Intelligentized regulating and controlling of quasi-granule water content is one of Intensified support, the important topic optimizing sintering.
Many existing patents are had to probe into water and solid particle interaction behavior, such as: number of patent application be 201220035769.3 a kind of can to the relatively low concrete of anti-permeability performance or the device having the non-fine concrete of relatively high permeability to carry out infiltration coefficient test, the device of this mensuration concrete impermeability, its principle is to insert in impervious test mould by test test specimen, determines the relative coefficient of permeability of test specimen with the height of test specimen water leaking-in under a certain pressure；Number of patent application is capillary water height and the isoparametric test device of speed that 201210183001.5 and 201220266310.4 proposition one can directly measure various porous media (including sand, sand, silt), what this device was investigated is that porous piles up bed capillary water absorption ability, it is possible to obtain the suction head of stacking material and the rate of water absorption based on height；In field of steel metallurgy, number of patent application is the device and method that the water absorbing properties of material is tested by 200920128074.8 and 201110396149.2 wicking abilities developing utilization accumulation bed material, distinguishing feature of this set test equipment is to ensure that material tension force at buoyancy suffered by test cylinder container and water-cylinder interface in water absorption course reaches dynamic equilibrium, in order to make the reading change of electronic balance can really reflect the mass change that material absorbs water；Number of patent application is 201010525686.8 to adhere to the content (X of powder in compounda), adhere to powder saturation moisture capacity (Waw), the endoporus water-holding capacity (W of nuclear particle (grain diameter > 0.25～1.0mm)cw) etc. predict suitable granulating moisture (W) as important parameter: W=(1-Xa)*Wcw+0.72Xa*Waw, this method determining mixture granulation adequate moisture needs to carry out multinomial detection content；Number of patent application is a kind of priming apparatus sintering iron charge on belt conveyer of 201220100340.8 propositions, it is possible to the fine iron breeze before entering sintered material link is added water-wet, in order to improves granulating efficiency, improve the breathability of sintering raw material layer；Number of patent application is 201110339783.2 improve the granulating efficiency of compound by part Iron Ore Powder pre-wetting is processed；Number of patent application is that 201210349537.X is intended to improve the moisture wettability to material particles by addition modified liquid, and then improves the pellet performance of material.These patents are not almost considered to be sprayed the actual features of moistening when sinter mixture interacts with moisture in pelletization.
Summary of the invention
The invention aims to overcome above-mentioned deficiency, it is provided that a kind of porous piles up determinator and the assay method thereof of bed water holding and Permeable characteristic.
A kind of porous piles up the determinator of bed water holding and Permeable characteristic, including outside framework 1, it is positioned at the computer 6 outside outside framework 1, second electronic balance 8 and water box 10, and it is positioned at the beaker 4 of outside framework 1, first electronic balance 5, suspender 7, hung drum 2 and test specimen tube 3, it is characterized in that: described first electronic balance 5 is positioned at bottom outside framework 1, described beaker 4 is positioned on the first electronic balance 5, described second electronic balance 8 is positioned at outside framework 1 top, one end of described suspender 7 is connected with the second electronic balance 8, the other end of described suspender 7 is connected with hung drum 2, described test specimen tube 3 is positioned at hung drum 2, the nozzle of described test specimen tube 3 is provided with spray thrower 11, described water box 10 is arranged on the lateral surface at outside framework 1 top, the water inlet of described spray thrower 11 is connected with the outlet of water box 10 by pipeline, described pipeline is provided with flow control valve 9, the signal output port of described second electronic balance 8 and the signal output port of the first electronic balance 5 are all connected with the signal input port of computer 6.
Further, the material of described outside framework 1, hung drum 2, water box 10 and test specimen tube 3 is lucite or resin.
Further, the bottom of described hung drum 2 is screen cloth.
Further, it is screen cloth bottom described test specimen tube 3, described screen cloth is covered with filter paper.
Further, two ends all bands hook of described suspender 7.
Further, the cup surface of described water box 10 is provided with volume markings.
A kind of determinator piling up bed water holding and Permeable characteristic such as above-mentioned porous, its assay method comprises the following steps:
Iron Ore Powder is carried out pretreatment by step 001.: it is that 115 ± 5 DEG C of drying in oven fall all of free moisture that Iron Ore Powder is put into temperature, gently press with Iron Ore Powder caked after crushing drying, take a part to be cooled to the Iron Ore Powder of room temperature and make quadruplicate sample to be detected by reduction device, be respectively charged into sample bag, perform sample marking after to put into drying baker standby；
Step 002. initializes the test condition of detecting device；
Step 003. piles up the water holding of bed sample and permeable procedural test；
Step 004. piles up solving of bed material water holding and Permeable characteristic parameter.
Wherein step 002 comprises the following steps:
Step 021, it is ensured that the data acquisition program of computer 6 can gather the reading change of the first electronic balance 5 and the second electronic balance 8 real-time dynamicly；
Step 022, carries out peeling operation to the first electronic balance 5 placing free beaker 4, the second electronic balance 8 of being hung with hung drum 2 and test specimen tube 3；
Step 023, loads total Water to be added in water box 10, keeps flow control valve 9 to be closed；
Step 024, loads appointment quality (m with the gradient of offset from perpendicular 45 degree in the test specimen tube 3 with filter paper0) dry sample, subsequently by rock so that pile up bed upper surface be smooth.
Wherein step 003 comprises the following steps:
Step 031, will be equipped with the test specimen tube 3 of sample and puts back in hung drum 2, the reading m of record now the first electronic balance 5(c5,0)Reading m with the second electronic balance 8(c8,0)；
Step 032, rapidly flow control valve 9 is opened to maximum opening, the water in water box 10 is allowed within a specified time to be sprayed onto the surface piling up bed by spray thrower 11, pile up bed material and start water suction and permeable process, the reading generation continuous print change of the first electronic balance 5 and the second electronic balance 8；
Step 033, after the reading of the first electronic balance 5 and the second electronic balance 8 no longer changes, stops the data acquisition program of computer 6 and preserves the data of collection, the now steady state readings value respectively m of the first electronic balance 5 and the second electronic balance 8(c5,T)And m(c8,T)；
Step 034, remove saturated water suction, stable state permeable after sample, cleaning dry test specimen tube 3, with the filter paper putting into tiling in backward test specimen tube 3.
Wherein step 004 comprises the following steps:
Step 041, the test process data according to step 003, draw the reading change curve piling up bed material water holding with permeable process the first electronic balance 5 and the second electronic balance 8, in this accumulation bed, the saturated water adsorptive value of Iron Ore Powder sample is: WSA(%)=(m(c8,T)-m(c8,0))/m0* 100%；Remember that the time period that the reading of the second electronic balance 8 begins to increase to start to reduce is the water holding time t piling up bed material0；
The saturated shedding quality m of breeze sampleSD=(m(c5,T)-m(c5,0)), in conjunction with saturated drainage time TDThe average permeation rate U of this sample knownPR=mSD/(m0*TD)(S-1)；
The shedding quality m of stacking bed interior breeze sampleSD(tD) with drainage time tDThe relation curve of change meets Lagergren first order rate equation:
mSD(tD)=mSD×(1-exp(-k×tD))
The m when sample is about to start drainage processSD(tD)=0, corresponding initial drainage time tD=0s；The m when shedding quality reaches capacity valueSD(tD)=mSD, corresponding drainage time tD=TD, wherein TDFor saturated drainage time；In drainage rate equation, parameter k reflects the drainage rate piling up bed sample, and the drainage rate of the more big then material of k is more fast, drainage saturation time TDMore short.
Present invention have the advantage that
1. method provided by the present invention can truly and reasonably reflect sinter mixture in production of granulating by the behavior of Water spray moistening, and the water retention characteristic measured and Permeable characteristic parameter are more beneficial for the regulation and control that add water of actual pelletization.
2. this method of testing verifies and accuracy controlling without the height that test specimen tube is hung, and has the features such as workable, testing process standardization is good.
3. outside framework used by, hung drum, test specimen tube and water box adopt transparent material to make, and facilitate direct observation experiment process and the material that adopts to ensure that lightweight and the miniaturization of package unit.
4. the method is obtained in that the test result of accuracy height, favorable reproducibility, and does not need manual record data in test process, decreases personal error and labor intensity.
Accompanying drawing explanation
Fig. 1 is the determinator schematic diagram that porous of the present invention piles up bed water holding and Permeable characteristic.
Fig. 2 is the curve chart that in test case, breeze water suction changes with permeable procedure quality.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated:
Porous of the present invention piles up the determinator of bed water holding and Permeable characteristic, including outside framework 1, it is positioned at the computer 6 outside outside framework 1, second electronic balance 8 and water box 10, and it is positioned at the beaker 4 of outside framework 1, first electronic balance 5, suspender 7, hung drum 2 and test specimen tube 3, described first electronic balance 5 is positioned at bottom outside framework 1, described beaker 4 is positioned on the first electronic balance 5, described second electronic balance 8 is positioned at outside framework 1 top, one end of described suspender 7 is connected with the second electronic balance 8, the other end of described suspender 7 is connected with hung drum 2, described test specimen tube 3 is positioned at hung drum 2, the nozzle of described test specimen tube 3 is provided with spray thrower 11, described water box 10 is arranged on the lateral surface at outside framework 1 top, the water inlet of described spray thrower 11 is connected with the outlet of water box 10 by pipeline, described pipeline is provided with flow control valve 9, the signal output port of described second electronic balance 8 and the signal output port of the first electronic balance 5 are all connected with the signal input port of computer 6.
The material of described outside framework 1, hung drum 2, water box 10 and test specimen tube 3 is lucite or resin, is so easy to observe and be conducive to lightweight and the miniaturization of device.The bottom of described hung drum 2 is screen cloth.It is screen cloth bottom described test specimen tube 3, described screen cloth is covered with filter paper.Two ends all bands hook of described suspender 7.The cup surface of described water box 10 is provided with volume markings.
Porous of the present invention piles up the assay method of bed water holding and Permeable characteristic, and its concrete steps include:
1, the pretreatment of Iron Ore Powder
First, it is that 115 ± 5 DEG C of drying in oven fall all of free moisture that the Iron Ore Powder (such as 2kg) of certain mass is put into temperature, gently presses with Iron Ore Powder caked after crushing drying.Take a part to be cooled to the Iron Ore Powder of room temperature and make quadruplicate sample to be detected (200g～500g/ part, m in this example by reduction device0=200g), be respectively charged into sample bag, perform sample marking after to put into drying baker standby.
2, the test condition of detecting device is initialized.
First, it is ensured that the data acquisition program of computer 6 can gather the reading change of the first electronic balance 5 and the second electronic balance 8 real-time dynamicly；Secondly, to placing the first electronic balance 5 of free beaker 4, it is hung with the second electronic balance 8 of hung drum 2 and test specimen tube 3 (being covered with filter paper on bottom screen) and removes the peel (reading clearings) and operate；Its three, total Water (60g) to be added is loaded in water box 10, keep flow control valve 9 be closed.Its four, specify quality (m with the gradient of offset from perpendicular 45 degree to loading in the test specimen tube 3 with filter paper0) dry sample, subsequently by slight rock or jolt ramming to make to pile up bed upper surface be smooth.
3, the water holding of bed sample and permeable procedural test are piled up.
(1) will be equipped with the test specimen tube 3 of sample and put back in hung drum 2, the reading (m of record now the first electronic balance 5 and the second electronic balance 8(c5,0)And m(c8,0)).(2) rapidly flow control valve 9 is opened to maximum opening, allows and be sprayed onto, by spray thrower 11, the surface piling up bed in the water at the appointed time (5s) in water box 10.Pile up bed material and start water suction and permeable process, the reading generation continuous print change of the first electronic balance 5 and the second electronic balance 8.(3) after the reading of the first electronic balance 5 and the second electronic balance 8 no longer changes, stop the data acquisition program of computer 6 and preserve the data of collection.Now, the steady state readings value respectively m of the first electronic balance 5 and the second electronic balance 8(c5,T)And m(c8,T).(4) remove saturated water suction, stable state permeable after sample, cleaning dry test specimen tube 3, with the filter paper putting into tiling in backward test specimen tube 3.
4, solving of bed material water holding and Permeable characteristic parameter is piled up.
By the test process data of the 3rd step, draw the reading change curve piling up bed material water holding with permeable process the first electronic balance 5 and the second electronic balance 8.In this accumulation bed, the saturated water adsorptive value (also referred to as wet volume capacity) of Iron Ore Powder sample is: WSA(%)=(m(c8,T)-m(c8,0))/m0* 100%；The saturated shedding quality m of breeze sampleSD=(m(c5,T)-m(c5,0)), in conjunction with saturated drainage time TDThe average permeation rate U of this sample knownPR=mSD/(m0*TD), (S-1)。
The shedding quality m of stacking bed interior breeze sampleSD(tD) with drainage time tDThe relation curve of change meets Lagergren first order rate equation:
mSD(tD)=mSD×(1-exp(-k×tD))
The m when sample is about to start drainage processSD(tD)=0, corresponding initial drainage time tD=0s；The m when shedding quality reaches capacity valueSD(tD)=mSD, corresponding drainage time tD=TD(saturated drainage time).In drainage rate equation, parameter k reflects the drainage rate piling up bed sample, and the drainage rate of the more big then material of k is more fast, drainage saturation time TDMore short.
Application example: with certain Iron Ore Powder for object of study, this invention will be described further below.
In test experiments, the granularmetric composition of all Iron Ore Powder OreA and chemical composition are respectively in Table 1 and table 2.
The granularmetric composition (%) of table 1 Iron Ore Powder OreA to be tested
| Sample | -0.125mm | ～0.125 | ～0.25 | ～0.5 | ～1.0 | ～2.0 | ～3.0 | ～5.0 | ～8.0 | +10.0 |
| OreA | 1.62 | 3.01 | 7.57 | 13.93 | 13.76 | 11.96 | 16.96 | 16.65 | 7.75 | 6.79 |
The chemical composition (%) of table 2 Iron Ore Powder OreA to be tested
| Sample | TFe | SiO2 | CaO | Al2O3 | MgO | FeO | TiO2 | P2O5 | S | LOI |
| OreA | 58.27 | 5.55 | 0.04 | 1.37 | 0.08 | 0.22 | 0.05 | 0.098 | 0.009 | 10.13 |
According to the experimental data drafting pattern that above-mentioned testing procedure will detect, it is possible to obtain breeze OreA as shown in Figure 2 and pile up the characteristic curve of bed water retention characteristic and Permeable characteristic.So saturated water adsorptive value (i.e. wet volume capacity) W of this breeze sampleSA(%)=28.6/200*100%=14.3%, water holding time t0=65s, saturated shedding quality mSD=31.2g, average permeation rate is UPR=31.2/ (200*86)=0.18*10-2(S-1).The dynamic drainage equation of stacking bed interior breeze sample is:
Claims (10)
1. the determinator of a porous accumulation bed water holding and Permeable characteristic, including outside framework (1), it is positioned at outside framework (1) computer (6) outward, second electronic balance (8) and water box (10), and it is positioned at the beaker (4) of outside framework (1), first electronic balance (5), suspender (7), hung drum (2) and test specimen tube (3), it is characterized in that: described first electronic balance (5) is positioned at outside framework (1) bottom, described beaker (4) is positioned on the first electronic balance (5), described second electronic balance (8) is positioned at outside framework (1) top, one end of described suspender (7) is connected with the second electronic balance (8), the other end of described suspender (7) is connected with hung drum (2), described test specimen tube (3) is positioned at hung drum (2), the nozzle of described test specimen tube (3) is provided with spray thrower (11), described water box (10) is arranged on the lateral surface at outside framework (1) top, the water inlet of described spray thrower (11) is connected with the outlet of water box (10) by pipeline, described pipeline is provided with flow control valve (9), the signal output port of described second electronic balance (8) and the signal output port of the first electronic balance (5) are all connected with the signal input port of computer (6).
2. porous according to claim 1 piles up the determinator of bed water holding and Permeable characteristic, it is characterised in that: the material of described outside framework (1), hung drum (2), water box (10) and test specimen tube (3) is lucite or resin.
3. porous according to claim 2 piles up the determinator of bed water holding and Permeable characteristic, it is characterised in that: the bottom of described hung drum (2) is screen cloth.
4. porous according to claim 3 piles up the determinator of bed water holding and Permeable characteristic, it is characterised in that: described test specimen tube (3) bottom is screen cloth, and described screen cloth is covered with filter paper.
5. porous according to claim 4 piles up the determinator of bed water holding and Permeable characteristic, it is characterised in that: two ends all bands hook of described suspender (7).
6. porous according to claim 5 piles up the determinator of bed water holding and Permeable characteristic, it is characterised in that: the cup surface of described water box (10) is provided with volume markings.
7. in claim 1-6, porous as described in any one piles up a determinator for bed water holding and Permeable characteristic, and its assay method comprises the following steps:
Iron Ore Powder is carried out pretreatment by step 001.: it is that 115 ± 5 DEG C of drying in oven fall all of free moisture that Iron Ore Powder is put into temperature, gently press with Iron Ore Powder caked after crushing drying, take a part to be cooled to the Iron Ore Powder of room temperature and make quadruplicate sample to be detected by reduction device, be respectively charged into sample bag, perform sample marking after to put into drying baker standby；
Step 002. initializes the test condition of detecting device；
Step 003. piles up the water holding of bed sample and permeable procedural test；
Step 004. piles up solving of bed material water holding and Permeable characteristic parameter.
8. porous according to claim 7 piles up the assay method of bed water holding and Permeable characteristic, and wherein step 002 comprises the following steps:
Step 021, it is ensured that the data acquisition program of computer (6) can gather the reading change of the first electronic balance (5) and the second electronic balance (8) real-time dynamicly；
Step 022, to placing first electronic balance (5) of free beaker (4), is hung with second electronic balance (8) of hung drum (2) and test specimen tube (3) and carries out peeling and operate；
Step 023, loads total Water to be added in water box (10), keeps flow control valve (9) to be closed；
Step 024, loads appointment quality (m with the gradient of offset from perpendicular 45 degree in the test specimen tube (3) with filter paper0) dry sample, subsequently by rock so that pile up bed upper surface be smooth.
9. porous according to claim 7 piles up the assay method of bed water holding and Permeable characteristic, and wherein step 003 comprises the following steps:
Step 031, will be equipped with the test specimen tube of sample (3) and puts back in hung drum (2), the reading m of record now the first electronic balance (5)(c5,0)Reading m with the second electronic balance (8)(c8,0)；
Step 032, rapidly flow control valve (9) is opened to maximum opening, the water in water box (10) is allowed within a specified time to be sprayed onto the surface piling up bed by spray thrower 11, pile up bed material and start water suction and permeable process, the reading generation continuous print change of the first electronic balance (5) and the second electronic balance (8)；
Step 033, after the reading of the first electronic balance (5) and the second electronic balance (8) no longer changes, stop the data acquisition program of computer (6) and preserve the data of collection, the now steady state readings value respectively m of the first electronic balance (5) and the second electronic balance (8)(c5,T)And m(c8,T)；
Step 034, remove saturated water suction, stable state permeable after sample, cleaning dry test specimen tube (3), with the filter paper putting into tiling in backward test specimen tube (3).
10. porous according to claim 7 piles up the assay method of bed water holding and Permeable characteristic, and wherein step 004 comprises the following steps:
Step 041, test process data according to step 003, drawing the reading change curve piling up bed material water holding with permeable process the first electronic balance (5) and the second electronic balance (8), in this accumulation bed, the saturated water adsorptive value of Iron Ore Powder sample is: WSA(%)=(m(c8,T)-m(c8,0))/m0* 100%；Remember that the time period that the reading of the second electronic balance (8) begins to increase to start to reduce is the water holding time t piling up bed material0；
The saturated shedding quality m of breeze sampleSD=(m(c5,T)-m(c5,0)), in conjunction with saturated drainage time TDThe average permeation rate U of this sample knownPR=mSD/(m0*TD)(S-1)；
The shedding quality m of stacking bed interior breeze sampleSD(tD) with drainage time tDThe relation curve of change meets Lagergren first order rate equation:
mSD(tD)=mSD×(1-exp(-k×tD))
The m when sample is about to start drainage processSD(tD)=0, corresponding initial drainage time tD=0s；The m when shedding quality reaches capacity valueSD(tD)=mSD, corresponding drainage time tD=TD, wherein TDFor saturated drainage time；In drainage rate equation, parameter k reflects the drainage rate piling up bed sample, and the drainage rate of the more big then material of k is more fast, drainage saturation time TDMore short.
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