CN216988058U - Dry-process coarse whiting grading and collecting device with narrow particle size - Google Patents

Abstract

The utility model provides a narrow particle size dry process heavy calcium grading collection device, includes feeding reamer (1), grinds machine (2), discharging pipe (3), one-level cyclone collector (4), one-level grader (5), first induced duct (6), one-time feed back (7), second grade cyclone collector (8), secondary feed back (9), second grade grader (10), second induced duct (11), sack collector (12), pulse oscillator (13), powder collector (14), draught fan (15), air exit (16) and packagine machine (17). The secondary cyclone grading arrangement is adopted, so that the grading effect is improved; and (3) removing larger particles during primary cyclone classification, and classifying the powder passing through the set primary classified particle fineness by a secondary cyclone classifier to further remove coarse particles in the calcium carbonate powder so as to greatly reduce the number of the coarse particles in the powder. The device has the advantages of high automation degree, high production efficiency and low energy consumption.

Description

Dry-process coarse whiting grading and collecting device with narrow particle size

Technical Field

The utility model relates to a dry-method heavy calcium grading and collecting device with narrow particle size, belonging to superfine mineral powder grading equipment.

Background

The dry production process flow of the heavy calcium carbonate comprises the following steps: firstly, manually selecting calcite, limestone, chalk, shells and the like transported from a quarry to remove gangue; and crushing the mine by using a crusher, crushing by using grinding equipment to obtain calcium carbonate powder, grading the powder by using a grading machine, packaging and warehousing the powder meeting the granularity requirement as a product, and otherwise, returning to the grinding machine for grinding again. The dry ground calcium carbonate grinding equipment is usually vertical roller mill, ball mill, ring roller mill and the like, and the product prepared by the dry grinding equipment has wide particle size distribution and usually has coarse particles. The existence of coarse particles in the product can influence the application of the product in the downstream field, so that the product has large abrasion on downstream processing equipment, has poor compatibility with downstream base materials, is easy to form holes and defects in downstream materials, and has poor mechanical properties.

The traditional dry-process heavy calcium separation is generally carried out by adopting a single cyclone collector for separation and collection, generally 2 or 4 classifiers are used for separation, and partial coarse particles can be separated by adopting the separation process. With the increasing market requirements, the demands of ground calcium carbonate with narrower particle size distribution are wider and wider, and the market demands cannot be met by adopting a traditional single cyclone collector.

Disclosure of Invention

The utility model aims to provide a dry-method coarse whiting grading and collecting device with a narrow particle size in order to improve various performance indexes of coarse whiting in the downstream application field.

The technical scheme includes that the dry-method coarse whiting grading and collecting device with the narrow particle size comprises a feeding reamer, a grinder, a cyclone collector, a draught fan, a packaging machine, a grader, a cloth bag collector, a pulse vibrator, an exhaust pipe, a powder collector, an induced draft pipe and a material return pipe.

The cyclone collector comprises a primary cyclone collector and a secondary cyclone collector; the grader comprises a primary grader and a secondary grader; the feed back pipe comprises a primary feed back pipe and a secondary feed back pipe; the induced draft tube comprises a first induced draft tube and a second induced draft tube.

The first-stage cyclone collector and the second-stage cyclone collector are parallel to each other and vertically arranged on the upper part of the feeding reamer at a certain distance; the output end of the feeding reamer is connected with a grinder; a discharge pipe at the upper part of the grinding machine is connected with a primary cyclone collector, a primary classifier is arranged in the upper part of the primary cyclone collector, and a primary feed back pipe at the lower part of the primary cyclone collector is connected with the upper right part of the feeding reamer; a first induced air pipe connected with the primary classifier is connected with a secondary cyclone collector, the secondary classifier is arranged in the upper part of the secondary cyclone collector, and a secondary material return pipe at the lower part of the secondary cyclone collector is connected with the upper left part of the feeding reamer; a pulse vibrator is arranged in the cloth bag collector, and a second induced draft pipe connected with the secondary classifier is connected with the cloth bag collector; the lower part of the cloth bag collector is provided with a powder collector, and the output port of the powder collector is connected with a packaging machine; the upper part of the cloth bag collector is connected with a draught fan through a pipeline, and an air outlet of the draught fan is connected with an exhaust pipe.

The cyclone collector is used for grading the fineness of the particles by setting the rotating speed of the grader, and the calcium carbonate powder particles which do not reach the set grading fineness return to the grinder for grinding from the feed back pipe after being graded by the grader.

The upper parts of the first cyclone collector and the second cyclone collector are of stainless iron cylinder structures, the middle parts of the first cyclone collector and the second cyclone collector are of inverted cone structures, and the lower return pipe is a circular pipe.

The first-stage grader and the second-stage grader are both composed of a plurality of graders.

And a discharge pipe at the upper part of the grinding machine is connected with an inverted cone part of the primary cyclone collector.

And the first induced air pipe is connected with the cylindrical part of the secondary cyclone collector.

The utility model has the beneficial effects that the secondary cyclone grading arrangement is adopted, so that the grading effect is improved; meanwhile, larger particles can be removed during primary cyclone classification, the powder passing through the set primary classified particle fineness enters a secondary cyclone classifier for classification, and coarse particles in the calcium carbonate powder are further removed, so that the number of the coarse particles in the powder is greatly reduced; the product after secondary grading not meeting the requirement of particle fineness returns to the grinding machine for grinding, so that the requirement of narrow particle size distribution of the calcium carbonate powder fineness is ensured. The device has high automation degree, high production efficiency and low energy consumption; compared with the traditional 2 classifiers or 4 classifiers, the cyclone collector provided by the utility model has the advantage that the classification effect is improved by more than 30%.

Drawings

FIG. 1 is a schematic structural view of a narrow-particle-size dry-method heavy calcium carbonate grading and collecting device of the present invention;

in the figure, 1 is a feeding reamer; 2, a grinder; 3 is a discharge pipe; 4 is a first-stage cyclone collector; 5 is a first-stage grader; 6 is a first induced draft tube; 7 is a primary feed back pipe; 8 is a secondary cyclone collector; 9 is a secondary feed back pipe; 10 is a secondary classifier; 11 is a second induced draft pipe; 12 is a cloth bag collector; 13 is a pulse vibrator; 14 is a powder collector; 15 is a draught fan; 16 is an exhaust pipe; and 17 is a packing machine.

Detailed Description

The upper embodiment of the present invention is shown in fig. 1.

The embodiment provides a narrow particle size dry-process coarse whiting grading and collecting device, which comprises a feeding reamer 1, a grinding machine 2, a discharging pipe 3, a primary cyclone collector 4, a primary classifier 5, a first induced air pipe 6, a primary return pipe 7, a secondary cyclone collector 8, a secondary return pipe 9, a secondary classifier 10, a secondary induced air pipe 11, a cloth bag collector 12, a pulse oscillator 13, a powder collector 14, an induced air fan 15, an air outlet 16 and a packing machine 17.

The device of the embodiment is distributed in a factory workshop in three sections and two layers. Wherein the feeding reamer 1 is connected with the grinder 2, and the calcium carbonate powder ground by the grinder 2 is connected with the primary cyclone collector 4 through the discharge pipe 3. The upper part of the primary cyclone collector 4 is a cylindrical barrel made of stainless iron, the diameter of the cylindrical barrel is 1.2m, the height of the cylindrical barrel is 3.6m, the middle part of the cylindrical barrel is an inverted cone, a discharge pipe at the lower part of the cylindrical barrel is a circular pipe, the diameter of the circular pipe is 40cm, and the inclined side length of the cone is 3 m; a primary classifier 5 is arranged in the cylinder of the cyclone collector 4 at a position 60cm away from the top, wherein the primary classifier 5 consists of 6 classifiers with the diameter of 325 mm. The bottom discharge port of the primary cyclone collector 4 is connected with the feeding reamer 1 through a primary material return pipe 7, and the top center of the primary cyclone collector 4 is provided with a fine powder discharge port which is connected with a secondary cyclone collector 8 through a section of induced draft pipe 6.

The structure of the secondary cyclone collector 8 of the embodiment is the same as that of the primary cyclone collector 4, a coarse powder discharge port at the bottom of the secondary cyclone collector 8 is connected with the feeding reamer 1 through a secondary material return pipe 9, and a secondary classifier 10 is arranged in the cylinder of the secondary cyclone collector 8 at a position 60cm away from the top, wherein the secondary classifier 10 consists of 6 classifiers with the diameter of 325 mm; a fine powder discharge port is arranged at the center of the top of the secondary cyclone collector 8 and is connected with a cloth bag collector 12 through a second induced draft tube 11.

The inside pulse vibrator 13 that sets up automatic frequency conversion control of sack collector 12 of this embodiment sets up powder collector 14 in its bottom, is connected with packagine machine 17 through spiral reamer conveying pipeline, is connected with draught fan 15 through the tuber pipe in the top left side of sack collector 12, connects exhaust opening 16 behind draught fan 15.

The cyclone collector of the present embodiment classifies the fineness of particles by setting the rotational speed of the classifier; after being classified by the classifier, the calcium carbonate powder particles which do not reach the set classification fineness return to the grinding mill from the feed back pipe for grinding. The device of the embodiment is environment-friendly and green: the device leakproofness is good, and the mode that the final product adopted pulse sack to collect has avoided the dust to splash, has guaranteed the workshop environment.

Claims (6)

1. A dry-method coarse whiting grading and collecting device with narrow particle size comprises a feeding reamer, a grinder, a cyclone collector, a draught fan and a packaging machine; the device is characterized by also comprising a classifier, a bag collector, a pulse vibrator, an induced draft tube, a powder collector, an induced draft tube and a material return tube; the cyclone collector comprises a primary cyclone collector and a secondary cyclone collector; the grader comprises a primary grader and a secondary grader;

the first-stage cyclone collector and the second-stage cyclone collector are parallel to each other and vertically arranged on the upper part of the feeding reamer at a certain distance; the output end of the feeding reamer is connected with a grinder; a discharge pipe at the upper part of the grinding machine is connected with a primary cyclone collector, a primary classifier is arranged in the upper part of the primary cyclone collector, and a primary feed back pipe at the lower part of the primary cyclone collector is connected with the upper right part of the feeding reamer; a first induced draft pipe connected with the primary classifier is connected with a secondary cyclone collector, the secondary classifier is arranged in the upper part of the secondary cyclone collector, and a secondary material return pipe at the lower part of the secondary cyclone collector is connected with the upper left part of the feeding reamer; a pulse vibrator is arranged in the cloth bag collector, and a second induced draft tube connected with the secondary classifier is connected with the cloth bag collector; the lower part of the cloth bag collector is provided with a powder collector, and the output port of the powder collector is connected with a packaging machine; the upper part of the cloth bag collector is connected with a draught fan through a pipeline, and an air outlet of the draught fan is connected with an exhaust pipe.

2. The dry-method coarse whiting classification and collection device for the narrow-particle-size particles as claimed in claim 1, wherein the cyclone collector is used for classifying the fineness of the particles by setting the rotating speed of the classifier, and after the particles are classified by the classifier, the calcium carbonate powder particles which do not reach the set classification fineness are returned to the grinding mill from the material return pipe for grinding.

3. The dry-method coarse whiting classification and collection device with the narrow particle size as claimed in claim 1, wherein the upper parts of the primary cyclone collector and the secondary cyclone collector are of stainless iron cylinder structures, the middle parts of the primary cyclone collector and the secondary cyclone collector are of inverted cone structures, and the lower return pipe is a round pipe.

4. The dry classification and collection device for the heavy calcium carbonate with narrow particle size as claimed in claim 1, wherein the primary classifier and the secondary classifier are composed of a plurality of classifiers.

5. The dry dense calcium grading and collecting device with narrow particle size according to claim 1, wherein the discharge pipe at the upper part of the grinder is connected with the inverted cone part of the primary cyclone collector.

6. The dry classification and collection device for the narrow-particle-size coarse whiting as claimed in claim 1, wherein the first induced draft pipe is connected with the cylinder part of the secondary cyclone collector.

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