CN103964407B - The special ammonium phosphate salt of ABC powder extinguishing agent and production method thereof - Google Patents

Abstract

The invention discloses the special ammonium phosphate salt of a kind of ABC powder extinguishing agent and production method thereof.It is with adding water filtration after adding vitriol oil extraction after adding water for ball milling after Rock Phosphate (72Min BPL) fragmentation, washing to obtain phosphoric acid by wet process; Add liquefied ammonia neutralization again, until when nitrogen content reaches 9% ~ 10%, pH value is 4 ~ 4.2 only; Obtain finally by concentrated spray drying; Its quality standard is: NH ₄h ₂pO ₄content 80% ~ 90%; Water ratio≤0.5%; Rate of moisture absorption <3%; Loose density >0.7; PH value 4 ~ 4.2; Mg content≤2%; Iron level≤0.03%; Ammonium sulfate 6% ~ 8%; Nitrogen content 9% ~ 10%; Granularity (order number)>=60 orders.Utilize its production ABC powder extinguishing agent to improve quality, reduce production cost.

Description

The special ammonium phosphate salt of ABC powder extinguishing agent and production method thereof

Technical field

The present invention relates to phosphoric acid salt, particularly powder extinguishing agent phosphoric acid salt and production method thereof.

Background technology

Monoammonium phosphate is the main raw material of ABC powder extinguishing agent.The applicant is manufacture level monoammonium phosphate from 1994.2003 start production ABC powder extinguishing agent, when at a time when country implement halon phaseout program, ABC powder extinguishing agent name is at that time called " ammonium phosphate salt " powder extinguishing agent, and its main raw material all uses industrial grade monoammonium phosphate or agriculture level monoammonium phosphate.Through observation analysis in using for a long time, find the main raw material all defectiveness of this two kind of ammonium as ABC dry powder.Impurity as own in agriculture monoammonium phosphate is various, and water-soluble phosphorus is low, only accounts for about 79% of available phosphorus; NH ₄h ₂pO ₄content low; And water content is up to 3-5%, rate of moisture absorption, substantially about 5%, thus drastically influence the quality of fire-fighting powder.After within 2012, Ministry of Public Security's fire product conformity assessment center declares off the regulation of determining ammonium biphosphate content " it is poor to pay " 3% of ABC dry powder, agriculture monoammonium phosphate all cannot use because determining ammonium biphosphate content is low.And industrial monoammonium phosphate is fine for ABC powder extinguishing agent, but it is expensive, there is the shortcoming that portioned product free acid content is high simultaneously, and because it eliminates the necessary sulfate radical of dry powder etc. aborning, dry powder production cost is caused significantly to raise (per ton about high about 1000 yuan), very large to the Influence of production of powder extinguishing agent.After internal relation in deep study and analysis between the technical indicator of first two monoammonium phosphate and the quality and technical index of ABC powder extinguishing agent, we determine to research and develop a kind of from technical grade one ammonium completely different with agriculture level one ammonium and and the special ammonium phosphate salt that mates completely of ABC powder extinguishing agent quality and technical index.Be successfully completed the flow processs such as lab scale, pilot scale and large-scale production, more than ten thousand ton products of production at present, be used in quality through tens powder extinguishing agent manufacturers and all obtain consistent affirming and favorable comment in price.

Summary of the invention

The object of the invention is to the deficiency for first two monoammonium phosphate technical scheme, develop a kind of steady quality and match with powder extinguishing agent quality and technical index, the special ammonium phosphate salt of cheap ABC powder extinguishing agent.

Technical scheme of the present invention is: the special ammonium phosphate salt of a kind of ABC powder extinguishing agent, is characterized in that, its quality standard is:

Produce a method for the special ammonium phosphate salt of ABC powder extinguishing agent, in turn include the following steps:

Water for ball milling is added after A, Rock Phosphate (72Min BPL) fragmentation;

B, A walk gained material and add after sulfuric acid extraction through washing, filtering, be concentrated to the phosphoric acid by wet process of concentration about 25%;

C, B walk gained material and add liquefied ammonia and carry out neutralization reaction, until reaction terminates when nitrogen content reaches 9% ~ 10%, pH value is 4 ~ 4.2;

D, C walk gained material through concentrated, and spraying dry, obtains the special ammonium phosphate salt of ABC powder extinguishing agent.

In the present invention: NH ₄h ₂pO ₄content adjustable 80% ~ 90%, fill a prescription consistent with 50+25 (primary ammonium phosphate+ammonium sulfate) ABC powder extinguishing agent completely, thus there will not be formula unmatched problem; Water ratio≤0.5% also meets the requirement that powder extinguishing agent is produced substantially; Rate of moisture absorption is less than 3% and also follows the technical indicator of dry powder consistent; Loose density is greater than 0.7 and also matches with the close rate 0.8 ~ 0.9 of dry powder pine; Because the larger addition material of a part of proportion also will be added in process of production, as talcum powder, silica flour etc., just in time consistent with the loose density of dry powder; PH value 4 ~ 4.2 can effectively prevent the existence (generally acknowledging in industry that free acid content is more low better) of free acid, is conducive to pulverizing and the oven dry of dry powder raw material, and avoids (NH ₄) ₂hPO ₄enter; Mg content is no more than the low rate of moisture absorption that 2% ensure that dry powder, dry powder is not absorbed water, does not lump; Ammonium sulfate reaches 6% ~ 8%, decreases the add-on of producing the ammonium sulfate that dry powder needs, reduces dry powder production cost; Nitrogen content is about 9% ~ 10%, avoids (NH ₄) ₂hPO ₄enter, be conducive to dry powder repellency can raising and the reduction of rate of moisture absorption, ensure that the long-term storage of dry powder is not lumpd; Iron level is no more than 0.03%, in addition mica powder add the electrical insulation capability that ensure that powder extinguishing agent; Granularity reaches 60 order ~ 80 orders, decreases pulverizing difficulty and the grinding time of dry powder production.Therefore, the various indexs of special ammonium phosphate salt all match with ABC powder extinguishing agent quality index, have important difference with other monoammonium phosphate.

Accompanying drawing explanation

Figure of description is the process flow sheet of production method of the present invention.

Embodiment

The special ammonium phosphate salt of a kind of ABC powder extinguishing agent, it is characterized in that, its quality standard is:

Produce a method for the special ammonium phosphate salt of ABC powder extinguishing agent, in turn include the following steps:

Water for ball milling is added after E, Rock Phosphate (72Min BPL) fragmentation;

F, A walk gained material and add after sulfuric acid extraction through washing, filtering, be concentrated to the phosphoric acid by wet process of concentration about 25%;

G, B walk gained material and add liquefied ammonia and carry out neutralization reaction, until reaction terminates when nitrogen content reaches 9% ~ 10%, pH value is 4 ~ 4.2;

H, C walk gained material through concentrated, and spraying dry, obtains the special ammonium phosphate salt of ABC powder extinguishing agent.

The percentage ratio related in the present invention, if be weight percentage without what refer in particular to.It is better with the vitriol oil of 98% that B walks the sulfuric acid added.

The major traits of product of the present invention and an existing industrial ammonium, an agriculture ammonium, ABC powder extinguishing agent contrasts to be shown

The technical indicator of the special ammonium phosphate salt of the above-mentioned fire-fighting of comprehensive analysis, can find its obviously and other general monoammonium phosphate be essentially different, therefore, the ABC powder extinguishing agent all technical using it to produce can realize smoothly, the quality of powder extinguishing agent is improved greatly, and then improves dry-chemical fire extinguishing effect.And due to moisture and the control of granularity, the deliberately retention of ammonium sulfate, stopped the phenomenon of doing over again in production process, make dry powder production power saving, economize coal, shorten the production cycle, greatly reduce the comprehensive production cost of dry powder.Goal of the invention is reached completely through on probation.Present method has broken the production method of traditional industry, agriculture monoammonium phosphate, is completely by the processing method that the needs of powder extinguishing agent technical indicator design, and is pioneering, significant in national ABC powder extinguishing agent raw material production industry.

Claims (3)

1. the special ammonium phosphate salt of ABC powder extinguishing agent, is characterized in that, its quality standard is:

A、NH ₄H ₂PO ₄ 80～90%；

B, water ratio≤0.5%;

C, rate of moisture absorption <3%;

D, loose density >0.7;

E, pH value 4 ~ 4.2;

F, Mg content≤2%;

G, iron level≤0.03%;

H, ammonium sulfate 6% ~ 8%;

I, nitrogen content 9% ~ 10%;

J, granularity order number >60 order.

2. produce a method for the special ammonium phosphate salt of ABC powder extinguishing agent as claimed in claim 1, in turn include the following steps:

Water for ball milling is added after A, Rock Phosphate (72Min BPL) fragmentation;

B, A walk gained material add sulfuric acid extraction after through washing, filter, the phosphoric acid by wet process of concentrated concentration 25%;

C, B walk gained material and add liquefied ammonia and carry out neutralization reaction, until reaction terminates when nitrogen content reaches 9% ~ 10%, pH value is 4 ~ 4.2;

D, C walk gained material through concentrated, and spraying dry, obtains the special ammonium phosphate salt of ABC powder extinguishing agent.

3. the method for the special ammonium phosphate salt of production ABC powder extinguishing agent according to claim 2, is characterized in that, the sulfuric acid described in B step is the vitriol oil.