CN105716989B - The measurement device and its assay method of porous accumulation bed water holding and Permeable characteristic - Google Patents
The measurement device and its assay method of porous accumulation bed water holding and Permeable characteristic Download PDFInfo
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- CN105716989B CN105716989B CN201610225619.1A CN201610225619A CN105716989B CN 105716989 B CN105716989 B CN 105716989B CN 201610225619 A CN201610225619 A CN 201610225619A CN 105716989 B CN105716989 B CN 105716989B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000009825 accumulation Methods 0.000 title claims abstract description 34
- 238000005259 measurement Methods 0.000 title claims abstract description 11
- 238000003556 assay Methods 0.000 title claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 31
- 229910052742 iron Inorganic materials 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000000274 adsorptive effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 12
- 238000005469 granulation Methods 0.000 abstract description 9
- 230000003179 granulation Effects 0.000 abstract description 9
- 238000005453 pelletization Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 30
- 239000002245 particle Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000009736 wetting Methods 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
- 239000008188 pellet Substances 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
- 238000010521 absorption reaction Methods 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
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method 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
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- 239000000725 suspension Substances 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
- 238000012795 verification Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of measurement devices and its assay method of porous accumulation bed water holding and Permeable characteristic, including outer framework, computer, the second electronic balance outside outer framework and water box, and beaker, the first electronic balance, suspender, hung drum and test specimen tube in outer framework.Method provided by the present invention can really and reasonably reflect the behavior that sinter mixture is soaked in granulation production by water spray, the water retention characteristic measured and Permeable characteristic parameter are more advantageous to practical pelletization plus water regulation and control.
Description
Technical field
The invention belongs to make water retention characteristic and Permeable characteristic measurement and analysis technical field, tool to porous filling bed material
Body is related to a kind of measurement device and its assay method of porous accumulation bed water holding and Permeable characteristic.
Background technology
The granulation of sinter mixture is that one of the key link of High-quality Sinters is provided to blast furnace, to the energy of agglomeration for iron mine
Consumption, yield and quality have very significant impact.The water holding of material is suitable to pelletizing in Iron Ore Powder pelletization with Permeable characteristic
The pellet performances such as water content, the intensity of the quasi- particle of granulation have a great impact.Regulation and control granulation amount of water, optimization granulation plus water strategy
As the important measures of optimization granulating sinter mixture effect.In steel enterprise sintering production practices, experienced operator
The feel of touch is observed by the naked eye or pinched to judge whether technological parameter (water content of especially pelletizing) is reasonable, evaluation is mixed
Close the quality of material granulation result.Under complicated material condition, implement the high level pelletized to Iron Ore Powder by artificial experience
Manipulation is often very difficult.It is burnt due to the rare and high cost of iron ore powder sintering process expertise, while in order to ensure
Tie the stabilization of production with efficiently, production operator and researcher to the intelligence of sinter mixture dispensing and granulation produce into
Many of having gone is probed into.The Intelligentized regulating and controlling of quasi- particle water content is Intensified support, optimization sintering in Iron Ore Powder pelletization
One of important topic.
There are many existing patents to probe into water and solid particle interaction behavior, such as：Number of patent application is
201220035769.3 it is a kind of can to the lower concrete of anti-permeability performance or have compared with high permeability non-fine concrete progress
The device of infiltration coefficient test, this device for measuring concrete impermeability, principle are will to test test specimen to be placed in impervious examination
In mould, the relative coefficient of permeability of test specimen is determined with the height of test specimen water leaking-in under a certain pressure；Number of patent application is
201210183001.5 and 201220266310.4 proposition one kind can directly measure various porous medias (including sand, sand, powder
Soil) the parameters such as capillary water height and rate test device, what this device was investigated is porous accumulation bed capillary suction
Outlet capacity can obtain the suction head of stacking material and the rate of water absorption based on height；In field of steel metallurgy, patent
Application No. is 200920128074.8 and 201110396149.2 to develop the wicking ability using accumulation bed material
Come the device and method tested the water absorbing properties of material, the distinguishing feature of this set test equipment is to ensure that material is being inhaled
Buoyancy and the tension at water-cylinder interface during water suffered by test cylinder container reach dynamic equilibrium, so that electronics day
Flat reading variation can really reflect the mass change of material water suction；Number of patent application is 201010525686.8 in mixture
Adhere to the content (X of powdera), adherency powder saturation moisture capacity (Waw), nuclear particle (grain diameter>0.25~1.0mm) endoporus hold
Water (Wcw) etc. predict suitable for granulating moisture (W) as important parameter：W=(1-Xa)*Wcw+0.72Xa*Waw, this determination is mixed
The method for closing material granulation adequate moisture needs to carry out multinomial detection content；Number of patent application is that 201220100340.8 propositions are a kind of
It is sintered the priming apparatus of iron charge on belt conveyer, the fine iron breeze before entering sintered material link can be added
Water soaks, so as to the gas permeability for improving granulating efficiency, improving sintering raw material layer；Number of patent application passes through for 201110339783.2
The granulating efficiency of mixture is improved to the processing of part Iron Ore Powder pre-wetting；Number of patent application is intended to for 201210349537.X
Improve wetability of the moisture to material particles by the way that modified liquid is added, and then improves the pellet performance of material.These patents
Almost do not consider when sinter mixture interacts in pelletization with moisture by the actual features of spray wetting.
Invention content
The purpose of the invention is to overcome above-mentioned deficiency, a kind of survey of porous accumulation bed water holding and Permeable characteristic is provided
Determine device and its assay method.
A kind of measurement device of porous accumulation bed water holding and Permeable characteristic, including outer framework 1, are located at outside outer framework 1
Computer 6, the second electronic balance 8 and water box 10, and beaker 4, the first electronic balance 5, suspender in outer framework 1
7, hung drum 2 and test specimen tube 3, it is characterised in that：First electronic balance 5 is located at 1 bottom of outer framework, and the beaker 4 is located at
On first electronic balance 5, second electronic balance 8 is located at 1 top of outer framework, one end of the suspender 7 and the second electronics
Balance 8 is connected, and the other end of the suspender 7 is connected with hung drum 2, and the test specimen tube 3 is located in hung drum 2, the sample
The nozzle of cylinder 3 is equipped with spray thrower 11, and the water box 10 is mounted on the lateral surface at the top of outer framework 1, the spray thrower 11 into
The mouth of a river is connected by pipeline with the water outlet of water box 10, and the pipeline is equipped with flow control valve 9, second electronics day
Flat 8 signal output port and the signal output port of the first electronic balance 5 are connected with the signal input port of computer 6.
Further, the material of the outer framework 1, hung drum 2, water box 10 and test specimen tube 3 is organic glass or resin.
Further, the bottom of the hung drum 2 is sieve.
Further, 3 bottom of the test specimen tube is sieve, and filter paper is covered on the sieve.
Further, the both ends of the suspender 7 band hook.
Further, the cup surface of the water box 10 is equipped with volume markings.
A kind of measurement device of such as above-mentioned porous accumulation bed water holding and Permeable characteristic, assay method includes following step
Suddenly：
Step 001. pre-processes Iron Ore Powder：By Iron Ore Powder be put into temperature be 115 ± 5 DEG C of drying in oven fall it is all
Free moisture, light pressure takes the Iron Ore Powder that a part is cooled to room temperature to pass through contracting to be crushed caked Iron Ore Powder after drying
Quadruplicate test specimens to be checked are made in point device, be respectively charged into sample bag, perform sample marking after be put into it is spare in drying box；
Step 002. initializes the test condition of detection device；
Step 003. accumulates the water holding of bed sample and permeable procedural test；
Step 004. accumulates the solution of bed material water holding and Permeable characteristic parameter.
Wherein step 002 includes the following steps：
Step 021, it is ensured that the data acquisition program of computer 6 can real-time dynamicly acquire the first electronic balance 5 and
The reading of two electronic balances 8 changes；
Step 022, to placing the first electronic balance 5 of free beaker 4, being hung with the second of hung drum 2 and test specimen tube 3
Electronic balance 8 carries out peeling operation；
Step 023, total Water to be added is packed into water box 10, flow control valve 9 is kept to be closed；
Step 024, specified quality (m is packed into the test specimen tube 3 with filter paper with the gradient of 45 degree of offset from perpendicular0)
Drying sample, then by shaking so that accumulation bed upper surface is smooth.
Wherein step 003 includes the following steps：
Step 031, the test specimen tube 3 equipped with sample is put back in hung drum 2, records the reading of the first electronic balance 5 at this time
m(c5,0)With the reading m of the second electronic balance 8(c8,0)；
Step 032, flow control valve 9 is opened to maximum opening rapidly, allow water in water box 10 within a specified time
The surface of accumulation bed is sprayed onto by spray thrower 11, accumulation bed material starts water suction and permeable process, the first electronic balance 5
Continuous variation occurs with the reading of 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 computer 6
Data acquisition program and the data for preserving acquisition, at this time the steady state readings value of the first electronic balance 5 and the second electronic balance 8 distinguish
For m(c5,T)And m(c8,T)；
Step 034, the sample after saturation absorbs water, stable state is permeable, cleaning and dry test specimen tube 3 are removed, then to test specimen tube 3
Inside it is put into the filter paper of tiling.
Wherein step 004 includes the following steps：
Step 041, according to the test process data of step 003, accumulation bed material water holding and permeable process first are drawn
The reading change curve of electronic balance 5 and the second electronic balance 8, the saturated water adsorptive value of Iron Ore Powder sample is in the accumulation bed：
WSA(%)=(m(c8,T)-m(c8,0))/m0* 100%；Remember that the reading of the second electronic balance 8 begins to increase to the time for starting to reduce
Section is the water holding time t of accumulation bed material0；
The saturation shedding quality m of miberal powder sampleSD=(m(c5,T)-m(c5,0)), in conjunction with saturation drainage time TDUnderstand the sample
Average permeation rate UPR=mSD/(m0*TD)(S-1)；
The shedding quality m of stacking bed interior miberal powder sampleSD(tD) with drainage time tDThe relation curve of variation meets
Lagergren first order rate equations：
mSD(tD)=mSD×(1-exp(-k×tD))
The m when sample will start drainage processSD(tD)=0, corresponding initial drainage time tD=0s；Work as shedding quality
M when reaching saturation valueSD(tD)=mSD, corresponding drainage time tD=TD, wherein TDTo be saturated drainage time；Drainage rate equation
Middle parameter k reflects the drainage rate of accumulation bed sample, and the drainage rates of the more big then materials of k is faster, drainage saturation time TD
It is shorter.
The invention has the advantages that：
1. method provided by the present invention can really and reasonably reflect sinter mixture in granulation production by water
Spray the behavior of wetting, the water retention characteristic measured and Permeable characteristic parameter are more advantageous to practical pelletization plus water regulation and control.
2. the test method is not necessarily to carry out verification and accuracy controlling to the height that test specimen tube is hung, strong with operability,
The features such as testing process is normative good.
Outer framework, hung drum, test specimen tube and water box used in 3. are conveniently directly seen using made of transparent material
It examines experimentation and used material ensure that the lightweight and miniaturization of package unit.
4. this method can obtain, accuracy is high, test result of favorable reproducibility, and is not required to very important person during the test
Work records data, reduces human error and labor intensity.
Description of the drawings
Fig. 1 is the measurement device schematic diagram of the porous accumulation bed water holding and Permeable characteristic of the present invention.
Fig. 2 is the curve graph of miberal powder water suction and the variation of permeable procedure quality in test case.
Specific implementation mode
Below in conjunction with specific embodiment, the present invention is further illustrated：
The measurement device of the porous accumulation bed water holding and Permeable characteristic of the present invention, including outer framework 1, are located at outside outer framework 1
Computer 6, the second electronic balance 8 and water box 10, and beaker 4 in outer framework 1, the first electronic balance 5, suspension
Part 7, hung drum 2 and test specimen tube 3, first electronic balance 5 are located at 1 bottom of outer framework, and the beaker 4 is located at the first electronics day
On flat 5, second electronic balance 8 is located at 1 top of outer framework, and one end of the suspender 7 is connected with the second electronic balance 8,
The other end of the suspender 7 is connected with hung drum 2, and the test specimen tube 3 is located in hung drum 2, and the nozzle of the test specimen tube 3 is set
There are spray thrower 11, the water box 10 to be mounted on the lateral surface at 1 top of outer framework, the water inlet of the spray thrower 11 passes through pipeline
It is connected with the water outlet of water box 10, the pipeline is equipped with flow control valve 9, and the signal of second electronic balance 8 exports
The signal output port of port and the first electronic balance 5 is connected with the signal input port of computer 6.
The outer framework 1, hung drum 2, water box 10 and test specimen tube 3 material be organic glass or resin, so just
In the lightweight and miniaturization of observing and be conducive to device.The bottom of the hung drum 2 is sieve.3 bottom of the test specimen tube is
Sieve is covered with filter paper on the sieve.The both ends of the suspender 7 band hook.The cup surface of the water box 10 is equipped with
Volume markings.
The assay method of the porous accumulation bed water holding and Permeable characteristic of the present invention, specific steps include：
1, the pretreatment of Iron Ore Powder
First, by the Iron Ore Powder of certain mass (such as 2kg) be put into temperature be 115 ± 5 DEG C of drying in oven fall it is all from
By moisture, light pressure is to be crushed caked Iron Ore Powder after drying.The Iron Ore Powder that a part is cooled to room temperature is taken to pass through reduction device
Be made quadruplicate test specimens to be checked (200g~500g/ parts, m in this example0=200g), it is respectively charged into sample bag, performs
It is put into after sample marking spare in drying box.
2, the test condition of detection device is initialized.
First, it is ensured that the data acquisition program of computer 6 can real-time dynamicly acquire the first electronic balance 5 and the second electricity
The reading of sub- balance 8 changes；Secondly, to placing the first electronic balance 5 of free beaker 4, being hung with hung drum 2 and test specimen tube
Second electronic balance 8 of 3 (filter paper is covered on bottom screen) is removed the peel (reading is reset) operation；Third, by be added total
Water (60g) is packed into water box 10, and flow control valve 9 is kept to be closed.Fourth, with 45 degree of offset from perpendicular
Gradient is packed into specified quality (m into the test specimen tube 3 with filter paper0) drying sample, then pass through slight shaking or jolt ramming
So that accumulation bed upper surface is smooth.
3, the water holding of accumulation bed sample and permeable procedural test.
(1) test specimen tube 3 equipped with sample is put back in hung drum 2, records the first electronic balance 5 and the second electronics day at this time
Flat 8 reading (m(c5,0)And m(c8,0)).(2) flow control valve 9 is opened to maximum opening rapidly, the water in water box 10 is allowed to exist
The surface of accumulation bed is sprayed onto in specified time (5s) by spray thrower 11.Accumulation bed material starts water suction and permeable mistake
Continuous variation occurs for the reading of journey, the first electronic balance 5 and the second electronic balance 8.(3) when the first electronic balance 5 and second
After the reading of electronic balance 8 no longer changes, stops the data acquisition program of computer 6 and preserve the data of acquisition.At this point, first
The steady state readings value of electronic balance 5 and the second electronic balance 8 is respectively m(c5,T)And m(c8,T).(4) water suction of removing saturation, stable state are saturating
Sample after water, cleaning and dry test specimen tube 3, then to the filter paper for being put into tiling in test specimen tube 3.
4, the solution of bed material water holding and Permeable characteristic parameter is accumulated.
By the test process data of the 3rd step, accumulation bed material water holding and the first electronic balance of permeable process 5 and the are drawn
The reading change curve of two electronic balances 8.The saturated water adsorptive value of Iron Ore Powder sample in the accumulation bed (also referred to as wet volume capacity)
For：WSA(%)=(m(c8,T)-m(c8,0))/m0* 100%；The saturation shedding quality m of miberal powder sampleSD=(m(c5,T)-m(c5,0)), knot
Close saturation drainage time TDUnderstand the average permeation rate U of the samplePR=mSD/(m0*TD), (S-1)。
The shedding quality m of stacking bed interior miberal powder sampleSD(tD) with drainage time tDThe relation curve of variation meets
Lagergren first order rate equations：
mSD(tD)=mSD×(1-exp(-k×tD))
The m when sample will start drainage processSD(tD)=0, corresponding initial drainage time tD=0s；When shedding quality reaches
To m when saturation valueSD(tD)=mSD, corresponding drainage time tD=TD(saturation drainage time).Parameter k is anti-in drainage rate equation
The drainage rate of accumulation bed sample is reflected, the drainage rates of the more big then materials of k is faster, drainage saturation time TDIt is shorter.
Application example：The invention will be described further using certain Iron Ore Powder as research object below.
The granularmetric composition of all Iron Ore Powder OreA and chemical composition are shown in Tables 1 and 2 respectively in test experiments.
The granularmetric composition (%) of 1 Iron Ore Powder Ore A to be tested of table
| 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 2 Iron Ore Powder Ore A to be tested of table
| 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 above-mentioned testing procedure by the experimental data drafting pattern of detection, miberal powder Ore as shown in Figure 2 can be obtained
A accumulates the indicatrix of bed water retention characteristic and Permeable characteristic.So saturated water adsorptive value (i.e. wet volume capacity) W of the miberal powder sampleSA
(%)=28.6/200*100%=14.3%, water holding time t0=65s, saturation shedding quality mSD=31.2g, average permeable speed
Rate is UPR=31.2/ (200*86)=0.18*10-2(S-1).The dynamic drainage equation of stacking bed interior miberal powder sample is：
Claims (2)
1. a kind of assay method of the measurement device of porous accumulation bed water holding and Permeable characteristic, including outer framework (1), are located at outer
Computer (6), the second electronic balance (8) and the water box (10) of frame (1) outside, and the beaker in outer framework (1)
(4), the first electronic balance (5), suspender (7), hung drum (2) and test specimen tube (3), it is characterised in that：First electronics day
Flat (5) are located at outer framework (1) bottom, and the beaker (4) is located on the first electronic balance (5), the second electronic balance (8) position
At the top of the outer framework (1), one end of the suspender (7) is connected with the second electronic balance (8), the suspender (7) it is another
End is connected with hung drum (2), and the test specimen tube (3) is located in hung drum (2), and the nozzle of the test specimen tube (3) is equipped with spray thrower
(11), the water box (10) is mounted on the lateral surface at the top of outer framework (1), and the water inlet of the spray thrower (11) passes through pipeline
It is connected with the water outlet of water box (10), the pipeline is equipped with flow control valve (9), the letter of second electronic balance (8)
The signal output port of number output port and the first electronic balance (5) is connected with the signal input port of computer (6)；It is described
Outer framework (1), hung drum (2), water box (10) and test specimen tube (3) material be organic glass or resin；The hung drum
(2) bottom is sieve；Test specimen tube (3) bottom is sieve, and filter paper is covered on the sieve；The two of the suspender (7)
End band hook；The cup surface of the water box (10) is equipped with volume markings；Its assay method includes the following steps：
Step 001. pre-processes Iron Ore Powder：By Iron Ore Powder be put into temperature be 115 ± 5 DEG C of drying in oven fall it is all from
By moisture, light pressure takes the Iron Ore Powder that a part is cooled to room temperature to pass through reduction device to be crushed caked Iron Ore Powder after drying
Quadruplicate test specimens to be checked are made, be respectively charged into sample bag, perform sample marking after be put into it is spare in drying box；
Step 002. initializes the test condition of detection device；
Step 003. accumulates the water holding of bed sample and permeable procedural test；
Step 004. accumulates the solution of bed material water holding and Permeable characteristic parameter；Step 002 includes the following steps：
Step 021, it is ensured that the data acquisition program of computer (6) can real-time dynamicly acquire the first electronic balance (5) and
The reading of two electronic balances (8) changes；
Step 022, to placing the first electronic balance (5) of free beaker (4), being hung with hung drum (2) and test specimen tube (3)
Second electronic balance (8) carries out peeling operation；
Step 023, total Water to be added is packed into water box (10), flow control valve (9) is kept to be closed；
Step 024, it is packed into the test specimen tube (3) with filter paper with the gradient of 45 degree of offset from perpendicular and specifies quality m0It is dry
Dry sample, then by shaking so that accumulation bed upper surface is smooth；Step 003 includes the following steps：
Step 031, the test specimen tube (3) equipped with sample is put back in hung drum (2), records the reading of the first electronic balance (5) at this time
Number m(c5,0)With the reading m of the second electronic balance (8)(c8,0)；
Step 032, flow control valve (9) is opened to maximum opening rapidly, allow water in water box (10) within a specified time
The surface of accumulation bed is sprayed onto by spray thrower (11), accumulation bed material starts water suction and permeable process, the first electronics day
Continuous variation occurs for the reading of flat (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 computer (6)
Data acquisition program and preserve the data of acquisition, steady state readings of the first electronic balance (5) and the second electronic balance (8) at this time
Value is respectively m(c5,T)And m(c8,T)；
Step 034, the sample after saturation absorbs water, stable state is permeable, cleaning and dry test specimen tube (3) are removed, then to test specimen tube (3)
Inside it is put into the filter paper of tiling.
2. the assay method of the measurement device of a kind of porous accumulation bed water holding according to claim 1 and Permeable characteristic,
Wherein step 004 includes the following steps：
Step 041, according to the test process data of step 003, accumulation bed material water holding and the first electronics of permeable process are drawn
The reading change curve of balance (5) and the second electronic balance (8), the saturated water adsorptive value of Iron Ore Powder sample is in the accumulation bed：
WSA(%)=(m(c8,T)-m(c8,0))/m0* 100%；Remember the reading of the second electronic balance (8) begin to increase to start reduce when
Between section be accumulate bed material water holding time t0；
The saturation shedding quality m of miberal powder sampleSD=(m(c5,T)-m(c5,0)), in conjunction with saturation drainage time TDUnderstand the flat of the sample
Equal permeation rate UPR=mSD/(m0*TD)(S-1)；
The shedding quality m of stacking bed interior miberal powder sampleSD(tD) with drainage time tDThe relation curve of variation meets Lagergren mono-
Stage speed equation：
mSD(tD)=mSD×(1-exp(-k×tD))
The m when sample will start drainage processSD(tD)=0, corresponding initial drainage time tD=0s；When shedding quality reaches
M when saturation valueSD(tD)=mSD, corresponding drainage time tD=TD, wherein TDTo be saturated drainage time；Join in drainage rate equation
Number k reflect the drainage rate of accumulation bed sample, and the drainage rates of the more big then materials of k is faster, saturation drainage time TDIt is shorter.
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| CN108469394A (en) * | 2018-03-07 | 2018-08-31 | 安徽亚美羽绒有限公司 | A kind of natural feather water absorption rate detection device and detection method |
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