CN102206126B - Method for safely preparing fireworks chemical by boiling granulating process - Google Patents

Abstract

The invention relates to a method for safely preparing fireworks chemical by a boiling granulating process and belongs to the field of fireworks. The method disclosed by the invention comprises: placing raw materials weighed in a firework chemical mixing ratio in a closed container, adding potassium bichromate with a particle size of less than 80 meshes in an amount which is 1 to 3 percent based on the total mass of the chemical; mixing by an air flow at a rate of 1 to 2m/s till uniformness; atomizing and spraying aqueous solution of cooked sticky rice powder into the closed container, and preparing the atomized solution of adhesive and the chemical in the closed container into granular chemicals by using an air flow at a rate of 1 to 2m/s and at a temperature ranging from room temperature to 60 DEG C, and drying to obtain the firework product. In the invention, the dose of the additive is small, the addition and granulation processes are simple, and the blast accidents caused by heat accumulation is avoided. Meanwhile, the prepared chemical particles are uniform, the free running property is high, dust is prevented, and the explosion stability of the firework products made by the chemical particles is higher.

Description

A kind ofly use the method that the fluidized granulating process safety prepares firework medicament

Technical field

The present invention relates to a kind of method that the fluidized granulating process safety prepares firework medicament of using, belong to the fireworks and firecrackers field.

Background technology

In order to improve the free-running property of firework medicament, reduce the dust in sieve medicine, the powder charge process, need carry out granulation to the finely powdered medicament.Traditional method is mixed the manual sieve of finely powdered raw material; Forcing screen method to accomplish granulation after adding sticker, is main with manual work mainly, and technology is outmoded; Be simply equipped; Inefficiency, and the direct tactiosensible firework medicament of producers usually cause blast accident because of the people for factors such as mishandle and static.Fluidized granulating is a kind of as wet granulation; Be that spray drying technology and fluidization are effectively combined and a kind of drying-granulating technology of obtaining; Cry a fluidisation mist projection granulating and a step granulation again, make processes such as traditional mixing, granulation and drying in same encloses container, once accomplish.This method can be enhanced productivity, and keeps constant product quality, reduces pollution and effectively realizes man-machine separation, significantly reduces the potential safety hazard that human factor causes.Along with the demand for development of science and technology with safety, energetic material fluidized granulating technology expands to the fireworks and firecrackers industry from military project research and development and production unit gradually, and the fireworks and firecrackers medicament is compared with the military project medicament; Mostly be inorganics, and complicated component, simultaneously; In granulation process, flammable and explosive substances such as the aluminium powder that firework medicament contains, aluminium-magnesium alloy powder and sulphur powder can with water in the binder solution or alcohol equal solvent generation chemical reaction, emit heat; When liberated heat exceeds the heat that firework medicament distributes gradually; Heat can slowly gather, and temperature rises gradually, and the rising of temperature has aggravated the carrying out of reaction again; So circulation reaches the spontaneous ignition temperature of medicament, can cause blast accident.Therefore, select the additive of the gentle cohesive action of suitable landing, and the fluidized granulating technology of research safety, can control the temperature rise of medicament, avoid taking place blast accident, guarantee the safety of responsive firework medicament fluidized granulating technology.

Summary of the invention

It is main the objective of the invention is in order to solve in the conventional smoke powder composition granulation process with manual operation; Inefficiency; Be prone to take place problems such as blast accident, the fluidized granulating method be applied to responsive firework medicament production, and select suitable additive and sticker; To reduce the medicament temperature in the granulation process, realize the firework medicament fluidized granulating technology of safety.

The objective of the invention is to realize through following technical scheme:

A kind of method that the fluidized granulating process safety prepares firework medicament of using of the present invention, its concrete preparation process is following:

1) will put into encloses container by the raw material of firework medicament proportioning weighing, and adding accounts for medicament total mass 1%～3%, particle diameter less than 80 purpose SRM 935as; With speed is to even more than 1～2m/s air-flow mixing 5min;

It is 3%～8% the aqueous solution that the ripe sticky rice flour that 2) will account for firework medicament total mass 1%～4% is made into mass concentration;

3) with step 2) in join the ripe sticky rice flour aqueous solution and atomize under the pressure of 0.2～0.6MPa with the speed of 100～200ml/min and spray in the encloses container of step 1); Using speed simultaneously is that binder solution and the medicament in the encloses container after 1～2m/s, temperature will atomize as room temperature～60 ℃ air-flow is prepared into the particulate state medicament, after the drying the firework medicament product.

Beneficial effect

The additive therefor consumption is few among the present invention, and interpolation and granulation process are simple, have avoided causing blast accident because of thermal accumlation.Simultaneously, the pharmacy particle of preparation is even, and free-running property is good, no dust, and it is better that the fireworks and firecrackers product of this pharmacy particle production of usefulness is seted off stability.

Embodiment

Below in conjunction with embodiment content of the present invention is further specified.

Embodiment 1

The prescription of used firework medicament is:

(1) sulphur powder, aluminium powder, magnesium aluminum-alloy powder, saltpetre, nitrate of baryta, SRM 935a and the ripe sticky rice flour of finely powdered are distinguished weighing 3.32kg, 0.676kg, 1.576kg, 0.732kg, 1.688kg; 0.12kg and 0.2kg; And ripe sticky rice flour is made into massfraction is 5% the aqueous solution, reduces to room temperature after the heated and boiled;

(2) with 1) in the medicament ultimate constituent and the SRM 935a of weighing in the fluidized granulating machine, use speed to mix as the air-flow of 1m/s;

(3) with 1) in institute join solution with 100ml/min speed, under 0.2MPa pressure atomizing and spirt 2) in tablets press, using speed simultaneously is that 40 ℃ of air-flows are prepared into the particulate state medicament with atomized soln and finely powdered medicament as 1m/s, temperature, gets target product after the drying.

The appearance temperature phenomenon that rises sharply not in this granulation process, the firework medicament uniform particles of preparation, free-running property is good, no dust.Reach requirement (this medicament firing altitude＞20m) of GB with the fireworks and firecrackers product firework display effect of particle medicament production of preparation.

Embodiment 2

The prescription of used firework medicament is:

(1) sulphur powder, aluminium powder, magnesium aluminum-alloy powder, saltpetre, nitrate of baryta, SRM 935a and the ripe sticky rice flour of finely powdered are distinguished weighing 3.32kg, 0.676kg, 1.576kg, 0.732kg, 1.688kg; 0.16kg and 0.24kg; And ripe sticky rice flour is made into massfraction is 6% the aqueous solution, reduces to room temperature after the heated and boiled;

(2) with 1) in the medicament ultimate constituent and the SRM 935a of weighing in the fluidized granulating machine, use speed to mix as the air-flow of 1.5m/s;

(3) with 1) in institute join solution with 150ml/min speed, under 0.4MPa pressure atomizing spirt 2 also) in tablets press; Using speed simultaneously is that 50 ℃ of air-flows are prepared into the particulate state medicament with atomized soln and finely powdered medicament as 1.5m/s, temperature, gets target product after the drying.

The appearance temperature phenomenon that rises sharply not in this granulation process, the firework medicament uniform particles of preparation, free-running property is good, no dust.Reach requirement (this medicament firing altitude＞20m) of GB with the fireworks and firecrackers product firework display effect of particle medicament production of preparation.

Embodiment 3

The prescription of used firework medicament is:

(1) sulphur powder, aluminium powder, magnesium aluminum-alloy powder, potassium perchlorate, nitrate of baryta, SRM 935a and the ripe sticky rice flour of finely powdered are distinguished weighing 1kg, 1kg, 1kg, 2.5kg, 2.5kg, 0.24kg and 0.32kg; And ripe sticky rice flour is made into massfraction is 7% the aqueous solution, reduces to room temperature after the heated and boiled;

(2) with 1) in the medicament ultimate constituent and the SRM 935a of weighing in the fluidized granulating machine, use speed to mix as the air-flow of 2m/s;

(3) with 1) in institute join solution with 200ml/min speed, under 0.6MPa pressure atomizing and spirt 2) in tablets press, using speed simultaneously is that 60 ℃ of air-flows are prepared into the particulate state medicament with atomized soln and finely powdered medicament as 2m/s, temperature, gets target product after the drying.

The appearance temperature phenomenon that rises sharply not in this granulation process, the firework medicament uniform particles of preparation, free-running property is good, no dust.Quick-fried sound is clear and melodious and paper web blown the requirement (this medicament is an explosive, blows paper web and gets final product) that reaches GB when setting off with the fireworks and firecrackers product of particle medicament production of preparation.

Claims (1)

1. use the method that the fluidized granulating process safety prepares firework medicament for one kind, it is characterized in that concrete preparation process is following:

1) will put into encloses container by the raw material of firework medicament proportioning weighing, and adding accounts for medicament total mass 1%～3%, particle diameter less than 80 purpose SRM 935as; With speed is to even more than 1～2m/s air-flow mixing 5min;

It is 3%～8% the aqueous solution that the ripe sticky rice flour that 2) will account for firework medicament total mass 1%～4% is made into mass concentration;

3) with step 2) in join the ripe sticky rice flour aqueous solution and atomize under the pressure of 0.2～0.6MPa with the speed of 100～200ml/min and spray in the encloses container of step 1); Using speed simultaneously is that binder solution and the medicament in the encloses container after 1～2m/s, temperature will atomize as room temperature～60 ℃ air-flow is prepared into the particulate state medicament, after the drying the firework medicament product.