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Process for preparing slurry with wide granularities distribution by parallel grinders

A technology of size distribution and slurry, which is applied in the field of preparing slurry with wide particle size distribution in parallel with mills, can solve the problem that there is no method to simultaneously solve high concentration and high stability of slurry, reduce contact points, and cannot solve slurry stability To achieve the effect of widening particle size distribution, convenient operation and improving pulping efficiency

Inactive Publication Date: 2002-07-03
SURFACE & INTERFACE CHEM ENG TECH RES CENT NANJING UNIV
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Problems solved by technology

Although this method has a certain effect on increasing the concentration of the slurry, it cannot solve the problem of the stability of the slurry due to the corresponding reduction in the contact points between the particles in the slurry due to the addition of additives.
[0003] Although the above technical solutions have made some progress in improving the concentration and stability of the slurry, there is no method to solve the high concentration and high stability of the slurry at the same time. How to overcome the problems of the existing technology has become the current One of the problems to be solved urgently in the field of slurry

Method used

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  • Process for preparing slurry with wide granularities distribution by parallel grinders

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Embodiment 1

[0011] Embodiment 1. prepares the method for Xinglongzhuang 2# clean coal water slurry of wide particle size distribution with mill parallel connection method.

[0012] The mass percentage of coal fed into the vibration mill and the ball mill is 10:90 to 50:50 to prepare the coal water slurry. Take the Xinglongzhuang 2# clean coal feeding mass percentage of vibratory mill and ball mill as 30:70 to prepare coal water slurry with a wide particle size distribution of 4.0kg / h as an example: the vibratory mill adopts 2MZG-38 type, and the load is 1.4kg / h, the amount of coal input is 0.83kg / h, the amount of dispersant NDF added is 0.02kg / h (25wt%), and the amount of water added is 0.55kg / h. 72.0 wt% filter cake. The ball mill adopts XMB-Ф240×330 type, with a volume of 13.57L, a load of 2.88kg / h, a coal input of 1.95kg / h, a dispersant NDF of 0.02kg / h (50wt%), and water of 0.90kg / h. The slurry made by the ball mill is mixed with the filter cake made by the vibrating mill after suc...

Embodiment 2

[0015] Example 2. A method for preparing Qilu petroleum coke water coke slurry with a wide particle size distribution by a mill parallel method.

[0016] The mass percentage of the coke feed in the vibratory mill and the ball mill is 15:85 to 35:65 to prepare water coke slurry. Take the Qilu petroleum coke feeding mass percentage of vibrating mill and ball mill as 25:75, and prepare water coke slurry with a wide particle size distribution of 4.0kg / h as an example: the vibrating mill adopts 2MZG-38 type, and the load is 1.24kg / h h, the amount of coke thrown is 0.74kg / h, the amount of dispersant NDF added is 0.01kg / h (50wt%), and the amount of water added is 0.49kg / h. The prepared slurry has a concentration of 72.0wt after suction filtration by a dehydrator % of filter cake. The ball mill adopts XMB-Ф240×330 type, with a volume of 13.57L, a load of 3.1kg / h, a coke casting amount of 2.23kg / h, a dispersant NDF of 0.03kg / h (50wt%), and water of 0.84 kg / h. The slurry made by the ...

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Abstract

A process for preparing slurry with wide range of granularities by parally grinders includes pre-crushing raw solid material, proportionally mixing it with water, adding disperser, respectively grinding in vibration grinder and ball grinder, filtering the slurry discharged from vibration grinder, and mixing it with the slurry discharged from ball grinder. Its advantages include wide granularity distribution, and high concentration and stability.

Description

1. Technical field [0001] The invention relates to a method for preparing slurry, in particular to a method for preparing slurry with wide particle size distribution in parallel with mills. 2. Background technology [0002] With the wide application of slurry in many fields, how to prepare slurry with high stability and high concentration has attracted more and more attention. Wet grinding is the most common and simple method for preparing slurry. In order to improve the concentration and stability of the slurry, it is usually necessary to adjust the length-to-diameter ratio of the mill, the barrel compartment of the mill, and adjust the grinding medium (such as adjusting the size and proportion of the steel ball size of the ball mill, using steel segments to replace some steel balls, etc. ) or adjust the feeding particle size of the mill to achieve it. However, these measures all have the problem of improving the concentration and stability of the slurry only by changing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/00B02C19/16C10L1/32
Inventor 沈健胡柏星何其慧
Owner SURFACE & INTERFACE CHEM ENG TECH RES CENT NANJING UNIV
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