CN103464266A

CN103464266A - High-concentration dry-method pulping process of grinding machine

Info

Publication number: CN103464266A
Application number: CN2013104317694A
Authority: CN
Inventors: 朱回军
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-17
Filing date: 2013-09-17
Publication date: 2013-12-25

Abstract

The invention discloses a high-concentration dry-method pulping process of a grinding machine. The high-concentration dry-method pulping process comprises the following steps: (1) grinding porcelain balls into a ball mill; and (2) measuring a coal slurry parameter. The high-concentration dry-method pulping process of the grinding machine provided by the invention has the advantages that coal samples required for each experiment are few in pulping under an existing experiment condition, a stirrer is easier and more time-saving to clean compared with a ball mill and different sizes of porcelain balls, a slurry body is uniform, and the applicable requirement is met.

Description

A kind of grinding machine high-concentration dry method pulping process

Technical field

The present invention relates to the application of meal mill in water-coal-slurry, especially about a kind of grinding machine high concentration wet method pulping process.

Background technology

Fragmentation and ore grinding all belong to the coal charge fragmentation of slurrying, due to these two broken stages, process the particle size range difference of coal charge, and the form difference of active force, cause them the efficiency of fragmentation also to differ widely.Break process be the coal of bulk, coal cinder is held in crusher chamber broken in disintegrating machine, crushing efficiency is high, crushing efficiency is greater than 50%～100%; What ore grinding was processed is the coal grain that granularity is less, and therefore the coal grain in grinding machine is subject to while being broken is with crusher machine,, in grinding process, the probability of coal grain fragmentation is very low, research shows, in grinding machine, broken probability is lower than 10%, and in grinding process, crushing efficiency is very low.Since broken efficiency is high, and the efficiency of ore grinding is low, so, coal charge fragmentation as slurrying, increase broken broken task and reduce the broken task of ore grinding, for fragmentation be totally favourable, this is also that " how broken few mill " reach the technical spirit of " grinding with broken generation ".From broken energy consumption laws analysis, the energy consumption of coarse crushing only is directly proportional to the logarithm of the ratio of reduction again, and the energy consumption of fine grinding subtracts one to the ratio of reduction and is directly proportional, and both almost differ an order of magnitude.So, from broken energy consumption laws analysis, the broken task that strengthens broken broken task and minimizing ore grinding also has theoretical foundation.

" how broken few mill " reach the best-of-breed technology scheme of " grinding with broken generation " in order to realize, the method that can adopt has several as follows: (1) changes open circuit crushing is closed circuit crushing, further reduces broken final size; (2) increase broken hop count, two sections change three sections into; (3) with the rod mill corase grind, replace fine crusher in small, broken bits; (4) adopt the fine crusher of better effects if in small, broken bits, fine granularity is down to lower; (5) adjust the ratio of reduction of each section disintegrating machine.

Summary of the invention

The object of the present invention is to provide a kind of grinding machine high-concentration dry method pulping process, is to adopt the dry method pulping process by the coal charge quick crashing.

2), measure the coal slurry parameter 1), the porcelain ball is put into grinding in ball grinder technical scheme of the present invention is achieved in the following ways: a kind of grinding machine high-concentration dry method pulping process comprises the following steps::; It is characterized in that:

1), ball milling, screening: the feed coal that will be less than 3mm is put into the ball mill ball milling regular hour, and the coal dust with standard screen after to ball milling is sieved, the coal sample that obtains being less than 74um He be greater than two kinds of particle size ranges of 74um;

Described screening is should be according to principle from small to large in the process of screening coal, first with the sieve of aperture minimum, sieve out the coal dust of granularity minimum, sieve out with aperture time little sieve the coal dust that particle diameter is slightly large again, the sieve screening of last aperture maximum, what sieve stayed above is exactly the coal dust of particle diameter maximum.

2), add additive to stir: the raw coal of two kinds of particle size range is mixed according to certain grating, the additive that takes certain content joins in the distilled water of certain mass, utilize agitator that dispersant solution is stirred, again the coal sample mixed is joined in the additive aqueous solution of continuous stirring, under the 1000r/min condition, constant speed stirs 5～10 minutes, obtains the product water coal slurry.

The present invention, under existing experiment condition, coal sample required while at every turn testing during slurrying is few, and Xian's agitator easily operates, saves time than rotating wash bowl grinding machine and big and small porcelain ball clearly, and slurry is even, can meet the requirement of application.

The specific embodiment

A kind of grinding machine high-concentration dry method pulping process comprises the following steps:

1, ball milling, screening: the feed coal that will be less than 3mm is put into the ball mill ball milling regular hour, and the coal dust with standard screen after to ball milling is sieved, the coal sample that obtains being less than 74um He be greater than two kinds of particle size ranges of 74um; Screening is should be according to principle from small to large in the process of screening coal, first with the sieve of aperture minimum, sieve out the coal dust of granularity minimum, sieve out with aperture time little sieve the coal dust that particle diameter is slightly large again, the sieve screening of last aperture maximum, what sieve stayed above is exactly the coal dust of particle diameter maximum.

2, add additive to stir: the raw coal of two kinds of particle size range is mixed according to certain grating, the additive that takes certain content joins in the distilled water of certain mass, utilize agitator that dispersant solution is stirred, again the coal sample mixed is joined in the additive aqueous solution of continuous stirring, under the 1000r/min condition, constant speed stirs 5～10 minutes, obtains the product water coal slurry.

Claims

2), measure the coal slurry parameter 1), the porcelain ball is put into grinding in ball grinder 1. a grinding machine high-concentration dry method pulping process comprises the following steps::; It is characterized in that:

1), ball milling, screening: the feed coal that will be less than 3mm is put into the ball mill ball milling regular hour, and the coal dust with standard screen after to ball milling is sieved, the coal sample that obtains being less than 74um He be greater than two kinds of particle size ranges of 74um;

2), add additive to stir: the raw coal of two kinds of particle size range is mixed according to certain grating, the additive that takes certain content joins in the distilled water of certain mass, utilize agitator that dispersant solution is stirred, again the coal sample mixed is joined in the additive aqueous solution of continuous stirring, under the 1000r/min condition, constant speed stirs 5～10 minutes, obtains the product water coal slurry.
2. a kind of grinding machine high-concentration dry method pulping process according to claim 1, it is characterized in that: the screening described step 1) is should be according to principle from small to large in the process of screening coal, first with the sieve of aperture minimum, sieve out the coal dust of granularity minimum, sieve out with aperture time little sieve the coal dust that particle diameter is slightly large again, the sieve screening of last aperture maximum, what sieve stayed above is exactly the coal dust of particle diameter maximum.