CN1033581A

CN1033581A - Produce the method that grinds of perlite abrasive material

Info

Publication number: CN1033581A
Application number: CN 87108397
Authority: CN
Inventors: 范昌海
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-18
Filing date: 1987-12-18
Publication date: 1989-07-05

Abstract

A kind of method that grinds of producing the perlite abrasive material, employing has between pre-classification or screening, check screening and above-mentioned two operations or the method that grinds of the closed circuit ball-milling technology production of the wet type perlite abrasive material of control size consist is arranged, not only avoided coarse-grained material in screening operation, dusting cover to be worn and torn, and its finished product has also satisfied the strict demand of abrasive material to grain size distribution.

Description

Produce the method that grinds of perlite abrasive material

The present invention is a kind of method that grinds of producing the perlite abrasive material.

As everyone knows, the great kinescope glass bulb of optical glass abrasive material, particularly consumption abrasive material is always made with float stone both at home and abroad.The abrasive material that utilized China's natural resources-perlite to make in recent years has that grinding rate is fast, good, the percentage of A-class goods advantages of higher of mill part fineness, is replacing pumice grinding at present.

Zhejiang Metallurgy Inst. had once developed with rod milling for balcony 743 factories in 1984 and had been classified into grinding process closed circuit, that one section closed circuit rod milling of wet type of cyclone desliming is used in its classification overflow, balcony 743 factories find that when industrial production rod milling efficient is low and in increase ball mill in 1987, change that rod milling adds ball milling and become two section one closed-circuit grinding method of once screening closed circuit, its undersize material cyclone desliming with garden shape vibrating fine screen into, this still exists technically: the screening feeding granularity is thick, load remakes into dusting cover screen cloth frequent wear; Grind the serious abrasion of iron in the operation and make finished product yield very low; Once sieve closed-circuit grinding technology and will optionally regulate disadvantages such as finished product grain size distribution amplitude is little.

Task of the present invention is to propose a kind of method that grinds that can reduce the dusting cover wearing and tearing, improve finished product yield and selectivity adjusting finished product grade.

The method of grinding that embodies the production perlite abrasive material of the present invention's proposition is the method that grinds that the closed circuit ball-milling technology of the wet type production perlite abrasive material that gives between first classification or screening, check screening and above-mentioned two operations or the control size consist is arranged is arranged.Wherein giving first classification or screening can be spiral classifier, cyclone, garden awl grader or sieve bend, and its effect is to screen out coarse grain to reduce dusting cover wearing and tearing and preliminary control grade; Wherein the control screening is cyclo fine screen or vertical garden shaft screen, and its effect is that the control grade is to obtain preliminary qualified grade material; Wherein check screening is a garden shape vibrating fine screen, and its effect is to remove upper limit coarse grain and adjust grain size distribution to obtain qualified ground material.

In the attrition process of said method, the corrasion that grinds medium is caused the iron pollution of product owing to the perlite slip, this can increase the loss in the magnetic concentration working of product after grinding, therefore grind operation except that adopting wear-resisting steel ball and liner plate, also must add alkalinity additive to reduce corrasion to iron.

In addition, as knowing well present technique on record, the desliming of abrasive material is finished with staging after can or grinding the loop in grinding the loop; Magnetic thing in the abrasive material can be removed with magnetic method; Proportion can be removed with gravity separation method greater than 2.5 objectionable impurities.

Said method can be illustrated with Fig. 1 most preferred embodiment.

With reference to Fig. 1, broken back material is through 3 one-tenth closed-circuit grindings of ball mill 2 and spiral classifier, the overflow of spiral classifier 3 is delivered to cyclo fine screen 5 screening-deslimings through pump 4, remove thin mud 6, its coarse grain sand setting and go into that former ball mill 2 is regrinded, its undersize material is gone into 7 screenings of garden shape vibrating fine screen, the sand return that its oversize material is gone into former ball mill 2 or gone into spiral classifier 3 follows also regrinds, the undersize material of garden shape vibrating fine screen 7 is got rid of harmful magnetic thing 9 through magnetic separator 8, and nonmagnetic qualified product 10 obtains final perlite abrasive material again after dehydration.

Produce 100 to handle 50 tons of perlites day below ^#Abrasive material is an example, narrates optimum implementation of the present invention.

With reference to Fig. 1, the broken back material that lumpiness is 0～20 millimeter feeds 1500 * 1500 millimeters ball mills of φ and grinds, the discharge of control ball milling concentration about 70% is gone into 750 millimeters spiral classifier classifications of φ, its coarse grain sand return is gone into former ball mill and is regrinded, control concentration is about 35%, the spiral classifier overflow of fineness 50～60%-0.074 millimeter with the ZPNJA sand pump with 0.3～0.6 kilograms per centimeter ²Pressure pumps into 150 millimeters cyclo fine screen screening-deslimings of φ, remove that thin mud (thin mud can be used as " detergent " is comprehensive to be reclaimed), about 60～65% sand settings of its concentration go into that former ball mill is regrinded after dehydration, granularity is controlled at-0.15 millimeter undersize material and goes into the shape vibrating fine screen check screening of 800 millimeters gardens of φ, the eliminating epimere leaks sieve+0.15 mm granules, its undersize material is through the magnetic separation of CTB-66 type permanent-magnet drum type magnetic separator, and the qualified product of removing behind the magnetic thing becomes final 100 after dewatering ^#The perlite abrasive material.

This example is only represented optimum implementation, just is used for illustrating the present invention, and must not regard the restriction to range of application of the present invention as.

Claims

1, a kind of wet type of producing the perlite abrasive material grinds method, it is characterized in that having the method that grinds of giving between first classification or screening, check screening and above-mentioned two operations or the closed circuit ball-milling technology production of the wet type perlite abrasive material of control size consist being arranged.

2, method according to claim 1, it is characterized in that wherein give first classification or screening can be spiral classifier, cyclone, garden awl grader or sieve bend.

3, method according to claim 1, it is characterized in that wherein controlling screening is cyclo fine screen or vertical garden shaft screen.

4, method according to claim 1 is characterized in that check screening wherein is a garden shape vibrating fine screen.

5, method according to claim 1 is characterized in that wherein ball milling operation adds the alkalinity additive that prevents iron rot.