CN110937959A

CN110937959A - Core for firework bright bead granulation

Info

Publication number: CN110937959A
Application number: CN201911210504.5A
Authority: CN
Inventors: 徐本湘
Original assignee: Liuyang Jiaxiang Chemical Business Department
Current assignee: Liuyang Jiaxiang Chemical Business Department
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-03-31

Abstract

The invention discloses a core for granulating bright fireworks beads, which consists of the following components in parts by weight: 6-11 parts of a binder; 15-25 parts of porcelain clay; 25-35 parts of cement; 45-55 parts of calcium carbonate; moistening with water, mixing, granulating, and sieving. The surface characteristics and the texture of the core are suitable for the granulation of the bright beads, and the burning and setting-off effects of the bright beads are not influenced; compared with the existing core, the preparation of the bright bead granulation can be completed with relatively smaller particle size; potential safety hazards in the core lifting process are avoided, and the safety of bright bead preparation is greatly improved; the core does not mildew, break and sandwich, so as to ensure the storage and burning-off performance of the bright bead; the production cost is greatly reduced; greatly improving the production efficiency.

Description

Core for firework bright bead granulation

Technical Field

The invention relates to a preparation method of firework bright beads.

Background

In the prior art, the process steps of the firework bright bead are as follows: 1) core pulling: pouring the powdery pyrotechnic composition powder into a drum granulator, spraying alcohol while rotating a drum, agglomerating the powder into small particles, and screening to obtain cores with uniform particle size, wherein the particle size of the cores is about 2-3 mm; 2) and (3) pelletizing bright beads: and pouring the core into a drum-type granulator, then pouring the powdery firework powder, rotating the drum, forming bright bead particles by the core in the drum which is in a rotary rolling adhesion effect and the firework powder which is larger and larger, stopping the drum, pouring the bright bead particles out, and screening to obtain the qualified firework bright bead finished product.

It is known in the art that coring is a very dangerous link in the preparation process of the bright beads, and the main danger of the bright bead preparation is caused by the coring.

In the traditional process of fireworks, rice is used as a core to avoid the danger of the core-lifting process. Publication No.: the CN103822544A Chinese invention patent document discloses a firework bright bead and a preparation method thereof, which also adopts a similar idea. However, plant seed particles existing in a natural form are easy to mildew and break, and the mildew of the core can cause the bright beads to mildew to different degrees, so that the combustion effect of the bright beads is seriously influenced; cracking of the core significantly affects the burning time of the bright beads. The bright bead burning effect can not meet the expected design requirement, and the whole burning fails in serious cases. The conventional process of using rice as a core has been abandoned in production practice.

Meanwhile, the existing core cores have the phenomenon of 'sandwich' in different degrees in the bright bead granulation, namely two core cores are stuck and overlapped and then the pyrotechnic composition is stuck, so that the bright bead particles have two core cores, and particularly the bright beads with the red light effect are more serious. The bright beads cannot be re-melted and reproduced, and can only be discarded and destroyed as waste materials.

Disclosure of Invention

In order to solve the defects, the invention aims to provide a core suitable for granulating bright beads of fireworks, improve the safety of bright bead preparation and avoid mildew, fragmentation and sandwich phenomena. In order to solve the technical problems, the invention adopts the technical scheme that the core for granulating the bright firework beads is characterized by comprising the following components in parts by weight: 6-11 parts of a binder; 15-25 parts of porcelain clay; 25-35 parts of cement; 45-55 parts of calcium carbonate; moistening with water, mixing, granulating, and sieving.

In the above technical scheme, the adhesive can be various adhesives in the firework industry, such as resins like polyvinyl alcohol glue, varnish, nitrocotton (solution), glutinous rice flour, starch, dextrin, glue of grass, organic solvents like acetone, moisture-proof agents, and the like. The petuntse is also called china clay, pottery clay, argil, terra cotta powder, dolomitic terra kwan-yin soil and the like.

Preferably, the core consists of the following components in parts by weight: 10 parts of an adhesive; 20 parts of porcelain clay; 30 parts of cement; 50 parts of calcium carbonate.

Preferably, the wetting with water is carried out by arranging a sprayer in the granulation roller and spraying water mist during the rotation of the roller.

Preferably, the mesh number of the sieved screen is 40-10 meshes. Preferably 20 mesh.

The core provided by the invention has the beneficial effects that the surface characteristics and the texture of the core are suitable for the granulation of the bright beads, and the burning and setting-off effects of the bright beads are not influenced; compared with the existing core, the preparation of the bright bead granulation can be completed with relatively smaller particle size; potential safety hazards in the core lifting process are avoided, and the safety of bright bead preparation is greatly improved; the core does not mildew, break and sandwich, so as to ensure the storage and burning-off performance of the bright bead; the production cost is greatly reduced; greatly improving the production efficiency.

The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Detailed Description

Example 1: the core for granulating the bright firework beads comprises the following components in parts by weight: 10 parts of an adhesive; 20 parts of porcelain clay; 30 parts of cement; 50 parts of calcium carbonate. Weighing the components according to the proportion, putting the components into a roller for granulation, arranging a sprayer in the roller, uniformly mixing the components in the rotation process of the roller, spraying water mist to moisten the composition, and sieving the granulated composition by a 40-mesh sieve to obtain undersize products, namely the cores. The preparation process of the core has no potential safety hazard. The undersize core of the 40-mesh standard sieve is round particles with the particle size of 0.4-0.5 mm. Uniform quality and uniform shape. When the core is adopted for preparing the bright beads, the core is added into a roller, alcohol is sprayed in the rotating process of the roller, and pyrotechnic medicaments are added for granulation as required. And (4) finishing. The bright beads with certain color-changing effects can be added into the firework drug in different levels.

Examples 2 to 7: the difference from the example 1 is that the core has different weight portions, as shown in the following table:

examples	Adhesive agent	Petuntse	Cement	Calcium carbonate
					2	6 portions of	15 portions of	25 portions of	45 portions of
3	7 portions of	17 portions of	27 portions of	48 portions of
					4	8 portions of	22 portions of	33 portions of	52 portions of
5	9 portions of	25 portions of	35 portions of	55 portions of
					6	10 portions of	15 portions of	28 portions of	46 portions of
7	6 portions of	24 portions of	34 portions of	54 portions of

Meanwhile, the mesh number of the screen mesh is adjusted according to the particle size of the bright beads, such as 20 meshes, 18 meshes, 16 meshes, 14 meshes, 12 meshes and 10 meshes. The grain size of the core with larger grain size is correspondingly increased, and the grain size range of the core manufactured and molded by the composition is about 0.4-2 mm, so that the preparation requirements of all general bright beads of the current firework product can be met.

So far, the bright bead prepared by the core of the invention has experimentally produced 98 tons of finished bright beads, and compared with the existing bright bead granulation mode adopting the pyrotechnic composition core, according to statistical data: the granulation efficiency of the bright beads per kilogram is improved by 28.5 percent on average (the preparation amount per roller work is about 25 kilograms); the average cost of each kilogram of core is only about 30 percent of the core of the existing pyrotechnic composition; the rejection rate is reduced by 95 percent, and basically no waste product appears; the pyrotechnic composition is uniformly adhered to the core, the quality and the shape of the bright beads are high in consistency, and no sandwich phenomenon is found. The cooperation of the trial manufacturers all reacted well.

The above-mentioned implementation is only for clearly illustrating the technical solutions of the present invention, and is not to be construed as limiting the present invention in any way. The present invention has many known alternatives and modifications in the art, which fall within the scope of the present invention without departing from the spirit of the present invention.

Claims

1. The core for granulating the bright firework beads is characterized by comprising the following components in parts by weight: 6-11 parts of a binder; 15-25 parts of porcelain clay; 25-35 parts of cement; 45-55 parts of calcium carbonate; moistening with water, mixing, granulating, and sieving.

2. The core according to claim 1, wherein said core is comprised of the following components in parts by weight: 10 parts of an adhesive; 20 parts of porcelain clay; 30 parts of cement; 50 parts of calcium carbonate.

3. Core according to claim 1 or 2, characterized in that said moistening with water is carried out by providing a nebuliser in the granulation drum, which sprays a water mist during the rotation of the drum.

4. The core according to claim 1 or 2 wherein the mesh size of the screened mesh is 40 to 10 mesh.

5. The core according to claim 3 wherein said screened mesh has a mesh size of 40 to 10 mesh.

6. The core according to claim 1 or 2, wherein said screened mesh has a mesh size of 20 mesh.

7. The core according to claim 3 wherein said screened mesh size is 20 mesh.