CN1174808C - Process for preparing slurry with wide granularities distribution by parallel grinders - Google Patents
Process for preparing slurry with wide granularities distribution by parallel grinders Download PDFInfo
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- CN1174808C CN1174808C CNB011380632A CN01138063A CN1174808C CN 1174808 C CN1174808 C CN 1174808C CN B011380632 A CNB011380632 A CN B011380632A CN 01138063 A CN01138063 A CN 01138063A CN 1174808 C CN1174808 C CN 1174808C
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Abstract
The present invention relates to a preparation method for slurry, particularly to a method for preparing slurry distributed with wide granularity by parallel connection grinding mills. According to the mass quality percentage of 10:90 to 50:50, precrushed solid raw materials, water and a dispersing agent are respectively placed in a vibrating mill and a ball mill for ore milling. The slurry prepared by the vibrating mill is processed by the suction filtration of a dewaterer and is mixed with the slurry prepared by the ball mill in a mixing tank, and then the slurry distributed with wide granularity is prepared. The present invention widens the distribution width of the granularity in the slurry so as to simultaneously increase the concentration and the stability of the slurry. The present invention has wide popularization and application value.
Description
One, affiliated technical field
The present invention relates to a kind of preparation method of slurry, particularly a kind of method with the wide size distribution solid-liquid slurry of grinding machine preparation in parallel.
Two, background technology
Along with slurry extensive use in a lot of fields, how to prepare the attention that high stability, high density slurry have more and more caused people.Wet milling is to prepare the commonly used and simple and direct method of slurry.For concentration and the stability that improves slurry, draw ratio, grinding mill barrel compartment, the adjustment mill of taking to adjust grinding machine usually is situated between (substituting part steel ball etc. as size and ratio, the use steel section of adjusting the ball mill ball size) or the methods such as feeding granularity of adjustment grinding machine realize.But the concentration that these measures all exist one or several technological parameter that has only changed grinding machine still can not fundamentally solve improves slurry and the problem of stability.Chinese patent application 87101684 has proposed a kind of method for preparing the stabilisation water-coal-slurry.This method is to add the alkali silicate or the carbonate that can generate water insoluble compound with calcium, magnesium ion in the readymade coal water slurry, the concentration that is dissolved in calcium, magnesium ion in the liquid of slurry upper strata by continuous or interrupted detection is controlled its addition, guarantee that its addition is enough to these ions are changed into water-fast compound, thereby make coal slurry stable and never degenerate in storage period.Though this method has certain effect to improving stability of coal slurry, because the grating situation not radical change as yet of solids in the slurry, so can not improve slurry concentration simultaneously.Chinese patent application 85100543, propose to use humate or its sulfonate derivatives that the peat composed of rotten mosses, weathered coal or brown coal produced, can be used as the preparation solids content is the above high-concentration water-coal slurry additive of 55wt%, uses or mix use with other additives all to obtain certain reduction viscosity and stablizing effect.Though this method has certain effect to improving slurry concentration, because the adding of additive causes the corresponding minimizing of contact point between the particle in the slurry, so can't solve the problem of the stability of slurry.
Though above technical scheme respectively the concentration that improves slurry and stable aspect obtained some progress, but still there are not at present the high concentration that solves slurry simultaneously and the method for high stability, how to overcome the problem that prior art exists, become one of difficult problem that needs to be resolved hurrily in the current slurry field.
Three, summary of the invention
The object of the present invention is to provide a kind of method, by widening particle size distribution width in the solid-liquid slurry, reach concentration and the stable effect that improves the solid-liquid slurry simultaneously with the wide size distribution solid-liquid slurry of grinding machine preparation in parallel.
Propose with the grinding machine method for preparing wide size distribution solid-liquid slurry in parallel according to the present invention, it is characterized in that at first the solid material behind the precrushing is placed vibrating mill and ball mill ore grinding by 10: 90 to 35: 65 mass percent example respectively with water and dispersant, the solid-liquid slurry that the solid-liquid slurry that vibrating mill makes makes with ball mill behind the dehydrator suction filtration mixes and makes the solid-liquid slurry of wide size distribution through blending tank.The present invention utilizes two kinds of granule sizes to mix with all different solid-liquid slurry that distributes to realize its purpose.This is because vibrating mill and ball mill are the dissimilar grinding attachments of two classes, ore grinding mechanism has certain difference: vibrating mill mainly reaches crushing effect by the high frequency oscillation of steel ball in the mill pipe, grinding efficiency is higher, can make the less powder of particle mean size, but it is narrow that the particle diameter of its particle distributes, deposition efficiency is very low, and the stability of the solid-liquid slurry of preparation and sticking surely concentration are not high; The ore grinding of ball mill early stage of fragmentation based on volumetric fracture, after particle reached certain particle size, broken grinding efficiency was lower based on surface failure of rock, the diameter of particle that makes usually is bigger.Select for use vibrating mill and ball mill preparation in parallel solid-liquid slurry to help advantage in conjunction with two kinds of equipment grinding modes, overcome the problem that vibrating mill is difficult to prepare high concentration and high stability solid-liquid slurry, by mixing the product that the two makes, the solid-liquid slurry that the wide particle diameter of preparation distributes, deposition efficiency is high, thus reach concentration and the stable purpose that improves the solid-liquid slurry simultaneously.The width of particle size distribution can calculate according to following formula in the solid-liquid slurry of the present invention:
In the formula, δ is the width of particle size distribution; D
nIt is the particle diameter of n grade; D
vVolume average particle size for particle; C
nIt is the percentage composition of n particle.The δ value is big more, and the bulk density of particle is just high more in the solid-liquid slurry, and the bulk density of particle is high more, has improved the deposition efficiency of powder in the solid-liquid slurry on the one hand; Increased interaction force and contact point between powder particle on the other hand, the concentration of solid-liquid slurry and stability are just high more.
The present invention compared with prior art beneficial effect is: the particle diameter that (1) has widened terminal solid-liquid slurry distributes, and has increased the deposition efficiency of particle, realizes the high concentration and the high stability of solid-liquid slurry; (2) utilize vibrating mill advantage efficiently, overcome the shortcoming that can not prepare high concentration solid-liquid slurry separately, improved slurrying efficient; (3) technology is simple, and is easy to operate, has application value widely.
Four. embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment 1. prepares the method for the prosperous village 2# cleaned coal water-coal-slurry of wide size distribution with the grinding machine multiple process.
The coal of vibrating mill and ball mill feed intake mass percent be 10: 90 to 35: 65 the preparation water-coal-slurry.With the prosperous village 2# cleaned coal of vibrating mill and the ball mill mass percent example that feeds intake is that the water-coal-slurry that 30: 70 preparation output is the wide size distribution of 4.0kg/h is an example: vibrating mill adopts the 2MZG-38 type, load is 1.4kg/h, coal feeding amount is 0.83kg/h, dispersant NDF addition is 0.02kg/h (25wt%), adding entry is 0.55kg/h, and the solid-liquid slurry that makes gets concentration behind the dehydrator suction filtration be the filter cake of 72.0wt%.Ball mill adopts XMB-Φ 240 * 330 types, and volume is 13.57L, loads to be that 2.88kg/h, coal feeding amount are 1.95kg/h, and dispersant NDF addition is 0.03kg/h (50wt%), and adding entry is 0.90kg/h.The filter cake that solid-liquid slurry that ball mill is made and vibrating mill make behind the dehydrator suction filtration mixes, and makes the water-coal-slurry of the high concentration high stability of wide size distribution.The coal that changes two grinding machines mass percent that feeds intake, respectively by 10: 90,20: 80 with 35: 65 and repeat above-mentioned experiment with identical slurrying output, make the water-coal-slurry of the high concentration high stability of 3 kinds of wide size distribution.
Measure separate unit ball mill (load is 2.0kg/h), separate unit vibrating mill (load is 2.0kg/h) respectively and be respectively 10: 90,20: 80,30: 70 and 35: 65 in two grinding machine coals mass percent that feeds intake by enterprise mark Q/3201NBJ02-1999 by the present invention, and coal concentration, viscosity and the dynamic stability of 6 kinds of water-coal-slurry that under identical slurrying output condition, make, and the coal particle diameter that uses laser particle analyzer to measure water-coal-slurry distributes, by formula calculate the dispersion of distribution of particle, the results are shown in Table 1.From table 1 as seen, the dispersion of distribution of using the present invention to make the particle of water-coal-slurry all has raising in various degree, concentration and dynamic stability also improve with the increase of the dispersion of distribution, when the coal of vibrating mill and the ball mill mass percent best results when being 20: 80 that feeds intake.
The water-coal-slurry performance table of table 1 different process method preparation
| The preparation method | Coal concentration (wt%) | Apparent viscosity (mPaS) | The distribution of particles width | Average grain diameter (μ m) | 24 hours dynamic settling speed (wt%/h) | |
| The separate unit ball mill | 67.5 | 1020 | 147.5 | 26.0 | 0.30 | |
| The separate unit vibrating mill | 58.5 | 1000 | 73.9 | 7.6 | 0.66 | |
| The solid material of vibrating mill and the ball mill mass percent that feeds intake | 10∶90 | 68.5 | 1020 | 177.3 | 24.0 | 0.14 |
| 20∶80 | 69.3 | 1010 | 209.0 | 22.1 | 0.07 | |
| 30∶70 | 68.8 | 1060 | 195.4 | 19.6 | 0.08 | |
| 35∶65 | 68.3 | 980 | 169.2 | 18.6 | 0.15 | |
Embodiment 2. prepares the method for the burnt slurry of Shandong petroleum coke water of wide size distribution with the grinding machine multiple process.
Jiao of vibrating mill and ball mill mass percent that feeds intake is 15: 85 to 35: the 65 burnt slurries of preparation water.With the Shandong petroleum coke of vibrating mill and the ball mill mass percent that feeds intake is 25: 75, preparation output is that the burnt slurry of water of the wide size distribution of 4.0kg/h is example: vibrating mill adopts the 2MZG-38 type, load is 1.24kg/h, throw burnt amount and be 0.74kg/h, dispersant NDF addition is 0.01kg/h (50wt%), adding entry is 0.49kg/h, and the solid-liquid slurry that makes gets concentration behind the dehydrator suction filtration be the filter cake of 82.0wt%.Ball mill adopts XMB-Φ 240 * 330 types, and volume is 13.57L, and load is 3.1kg/h, throws burnt amount and is 2.23kg/h, and dispersant NDF addition is 0.03kg/h (50wt%), and adding entry is 0.84kg/h.The filter cake that solid-liquid slurry that ball mill is made and vibrating mill make behind the dehydrator suction filtration mixes, and makes the burnt slurry of water of the high concentration high stability of wide size distribution.The petroleum coke that changes two grinding machines mass percent that feeds intake, respectively by 15: 85 with 35: 65 and repeat above-mentioned experiment with identical slurrying output, make burnt slurry of water of the high concentration high stability of 2 kinds of wide size distribution.
Measure separate unit ball mill (load is 2.0kg/h), separate unit vibrating mill (load is 2.0kg/h) respectively and be respectively 15: 85,25: 75 and 35: 65 in two grinding machine Jiao mass percent that feeds intake with reference to enterprise mark Q/3201NBJ02-1999 by the present invention, and burnt concentration, viscosity and the dynamic stability of the burnt slurry of 5 kinds of water that under identical slurrying output condition, makes, and the size distribution of mensuration particle, the results are shown in Table 2.From table 2 as seen, the dispersion of distribution of using the present invention to make the particle of the burnt slurry of water all has raising in various degree, the concentration and the dynamic stability of the burnt slurry of water also improve with the increase of the dispersion of distribution, when the petroleum coke of vibrating mill and the ball mill mass percent best results when being 25: 75 that feeds intake.
The burnt slurry of the water performance table of table 2 different process method preparation
| The preparation method | Coal concentration (wt%) | Apparent viscosity (mPaS) | The distribution of particles width | Average grain diameter (μ m) | 24 hours dynamic settling speed (wt%/h) | |
| The separate unit ball mill | 72.0 | 1010 | 153.7 | 31.0 | 0.30 | |
| The separate unit vibrating mill | 60.0 | 1000 | 58.3 | 11.3 | 0.76 | |
| The solid material of vibrating mill and the ball mill mass percent that feeds intake | 15∶85 | 72.8 | 950 | 187.2 | 28.0 | 0.14 |
| 25∶75 | 74.2 | 1030 | 219.1 | 26.1 | 0.08 | |
| 35∶65 | 73.1 | 1060 | 190.3 | 24.1 | 0.11 | |
Claims (2)
1, a kind of method with the wide size distribution solid-liquid slurry of grinding machine preparation in parallel, it is characterized in that at first the solid material behind the precrushing is placed vibrating mill and ball mill ore grinding by 10: 90 to 35: 65 mass percent example respectively with water and dispersant, the solid-liquid slurry that the solid-liquid slurry that vibrating mill makes makes with ball mill behind the dehydrator suction filtration mixes and makes the solid-liquid slurry of wide size distribution through blending tank.
2, the method with the wide size distribution solid-liquid slurry of grinding machine preparation in parallel according to claim 1 is characterized in that the solid material behind the precrushing places vibrating mill and ball mill ore grinding by 20: 80 mass percent examples respectively with water and dispersant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011380632A CN1174808C (en) | 2001-12-30 | 2001-12-30 | Process for preparing slurry with wide granularities distribution by parallel grinders |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011380632A CN1174808C (en) | 2001-12-30 | 2001-12-30 | Process for preparing slurry with wide granularities distribution by parallel grinders |
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| CN1356175A CN1356175A (en) | 2002-07-03 |
| CN1174808C true CN1174808C (en) | 2004-11-10 |
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| CNB011380632A Expired - Fee Related CN1174808C (en) | 2001-12-30 | 2001-12-30 | Process for preparing slurry with wide granularities distribution by parallel grinders |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102310011A (en) * | 2010-07-08 | 2012-01-11 | 藤原酿造机械株式会社 | Soy sauce is with the size distribution method of adjustment of chopping wheat |
| CN109795998A (en) * | 2018-12-29 | 2019-05-24 | 合肥融捷能源材料有限公司 | A kind of preparation method and lithium iron phosphate positive material promoting lithium iron phosphate positive material compacted density |
| CN111594763B (en) * | 2020-06-03 | 2021-02-05 | 北煤化(北京)科技有限公司 | Method for improving fluidity and concentration of ore pulp |
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