Anti-re-ignition dry powder fire extinguishing agent and preparation method thereof

Abstract

The invention discloses an anti-afterburning dry powder extinguishing agent which is prepared from the following materials in parts by weight: 130-152 parts of caustic sludge, 45-66 parts of sodium bicarbonate, 65-80 parts of zinc borate, 15-20 parts of marlstone, 18-24 parts of magnesium carbonate powder, 10-15 parts of silicone oil, 16-21 parts of gypsum, 2-5 parts of potassium iodate, 12-18 parts of tin oxide, 8-10 parts of silicon nitride, and 9-12 parts of glass fiber. The excellent effects are also shown in the following aspects: the extinguishing agent prepared according to the invention has ultrafine particle size, is hydrophobic and oleophobic, is good in mobility and injection performance, can float on a combustion liquid level in a dispersed way, can isolate air and can prevent afterburning.

Description

technical field

[0001] The invention belongs to the field of dry powder fire extinguishing agents, in particular to a recombustion-resistant dry powder fire extinguishing agent and a preparation method thereof. Background technique

[0002] Dry powder fire extinguishing agent is a kind of fine solid powder with dry and good fluidity, mainly composed of one or more fine inorganic powders with fire extinguishing ability and various additives, such as moisture-proof agent, anti-caking agent, flow accelerator, dyeing agent And so on. Dry powder fire extinguishing agents do not extinguish fires by cooling the material below the ignition point like water, or by creating a compartment between fuel and space like foam, nor do they inhibit combustion by diluting the oxygen concentration near the ignition point like some inert gases. Its unique fire extinguishing mechanism is due to the production of certain chemical substances when dry powder is used on the fire site, which destroys...

Examples

Embodiment 1

[0027] Example 1 The anti-resurgence dry powder fire extinguishing agent is prepared from the following raw materials, all in parts by weight (900g / part): 130 parts of alkali slag, 45 parts of sodium bicarbonate, 65 parts of zinc borate, 15 parts of marl, carbonic acid 18 parts of magnesium powder, 10 parts of silicone oil, 16 parts of gypsum, 2 parts of potassium iodate, 12 parts of tin oxide, 8 parts of silicon nitride, and 9 parts of glass fiber.

[0028] The preparation method of anti-recombustion dry powder fire extinguishing agent is:

[0029] (1) Mix alkali slag, sodium bicarbonate and gypsum, vacuum dehydrate at 100°C for 1 hour, and set aside;

[0030] (2) Add magnesium carbonate powder, marl, silicon nitride and glass fiber to the raw materials treated in step (1), grind for 20 minutes, heat up to 70°C and stir for 0.8 hours, and then pulverize with a superfine pulverizer , through a 80-mesh sieve to obtain the mixed material, and set aside;

[0031] (3) Add 0.2 ti...

Embodiment 2

[0033] Example 2 The anti-resurgence dry powder fire extinguishing agent is prepared from the following raw materials, all in parts by weight (500g / part): 152 parts of alkali slag, 66 parts of sodium bicarbonate, 80 parts of zinc borate, 20 parts of marl, carbonic acid 24 parts of magnesium powder, 15 parts of silicone oil, 21 parts of gypsum, 5 parts of potassium iodate, 18 parts of tin oxide, 10 parts of silicon nitride, and 12 parts of glass fiber.

[0034] The preparation method of anti-recombustion dry powder fire extinguishing agent is:

[0035] (1) Mix alkali slag, sodium bicarbonate and gypsum, vacuum dehydrate at 120°C for 3 hours, and set aside;

[0036] (2) Add magnesium carbonate powder, marl, silicon nitride and glass fiber to the raw materials treated in step (1), grind for 40 minutes, heat up to 90°C and stir for 1.4 hours, and then pulverize with a superfine pulverizer , passed through a 200-mesh sieve to obtain the mixed material, and set aside;

[0037] (3)...

Embodiment 3

[0039] Example 3 The anti-resurgence dry powder fire extinguishing agent is prepared from the following raw materials, all in parts by weight (800g / part): 134 parts of alkali slag, 50 parts of sodium bicarbonate, 70 parts of zinc borate, 16 parts of marl, carbonic acid 20 parts of magnesium powder, 12 parts of silicone oil, 17 parts of gypsum, 3 parts of potassium iodate, 14 parts of tin oxide, 8.5 parts of silicon nitride, and 10 parts of glass fiber.

[0040]The preparation method of anti-recombustion dry powder fire extinguishing agent is:

[0041] (1) Mix alkali slag, sodium bicarbonate and gypsum, vacuum dehydrate at 105°C for 1.5 hours, and set aside;

[0042] (2) Add magnesium carbonate powder, marl, silicon nitride and glass fiber to the raw materials treated in step (1), grind for 25 minutes, heat up to 75°C and stir for 1.0 hour, and then pulverize with a superfine pulverizer , passed through a 120-mesh sieve to obtain the mixed material, and set aside;

[0043] (3...

technical field

[0001] The invention belongs to the field of dry powder fire extinguishing agents, in particular to a recombustion-resistant dry powder fire extinguishing agent and a preparation method thereof. Background technique

[0002] Dry powder fire extinguishing agent is a kind of fine solid powder with dry and good fluidity, mainly composed of one or more fine inorganic powders with fire extinguishing ability and various additives, such as moisture-proof agent, anti-caking agent, flow accelerator, dyeing agent And so on. Dry powder fire extinguishing agents do not extinguish fires by cooling the material below the ignition point like water, or by creating a compartment between fuel and space like foam, nor do they inhibit combustion by diluting the oxygen concentration near the ignition point like some inert gases. Its unique fire extinguishing mechanism is due to the production of certain chemical substances when dry powder is used on the fire site, which destroys...

Examples

Embodiment 1

[0027] Example 1 The anti-resurgence dry powder fire extinguishing agent is prepared from the following raw materials, all in parts by weight (900g / part): 130 parts of alkali slag, 45 parts of sodium bicarbonate, 65 parts of zinc borate, 15 parts of marl, carbonic acid 18 parts of magnesium powder, 10 parts of silicone oil, 16 parts of gypsum, 2 parts of potassium iodate, 12 parts of tin oxide, 8 parts of silicon nitride, and 9 parts of glass fiber.

[0028] The preparation method of anti-recombustion dry powder fire extinguishing agent is:

[0029] (1) Mix alkali slag, sodium bicarbonate and gypsum, vacuum dehydrate at 100°C for 1 hour, and set aside;

[0030] (2) Add magnesium carbonate powder, marl, silicon nitride and glass fiber to the raw materials treated in step (1), grind for 20 minutes, heat up to 70°C and stir for 0.8 hours, and then pulverize with a superfine pulverizer , through a 80-mesh sieve to obtain the mixed material, and set aside;

[0031] (3) Add 0.2 ti...

Embodiment 2

[0033] Example 2 The anti-resurgence dry powder fire extinguishing agent is prepared from the following raw materials, all in parts by weight (500g / part): 152 parts of alkali slag, 66 parts of sodium bicarbonate, 80 parts of zinc borate, 20 parts of marl, carbonic acid 24 parts of magnesium powder, 15 parts of silicone oil, 21 parts of gypsum, 5 parts of potassium iodate, 18 parts of tin oxide, 10 parts of silicon nitride, and 12 parts of glass fiber.

[0034] The preparation method of anti-recombustion dry powder fire extinguishing agent is:

[0035] (1) Mix alkali slag, sodium bicarbonate and gypsum, vacuum dehydrate at 120°C for 3 hours, and set aside;

[0036] (2) Add magnesium carbonate powder, marl, silicon nitride and glass fiber to the raw materials treated in step (1), grind for 40 minutes, heat up to 90°C and stir for 1.4 hours, and then pulverize with a superfine pulverizer , passed through a 200-mesh sieve to obtain the mixed material, and set aside;

[0037] (3)...

Embodiment 3

[0039] Example 3 The anti-resurgence dry powder fire extinguishing agent is prepared from the following raw materials, all in parts by weight (800g / part): 134 parts of alkali slag, 50 parts of sodium bicarbonate, 70 parts of zinc borate, 16 parts of marl, carbonic acid 20 parts of magnesium powder, 12 parts of silicone oil, 17 parts of gypsum, 3 parts of potassium iodate, 14 parts of tin oxide, 8.5 parts of silicon nitride, and 10 parts of glass fiber.

[0040]The preparation method of anti-recombustion dry powder fire extinguishing agent is:

[0041] (1) Mix alkali slag, sodium bicarbonate and gypsum, vacuum dehydrate at 105°C for 1.5 hours, and set aside;

[0042] (2) Add magnesium carbonate powder, marl, silicon nitride and glass fiber to the raw materials treated in step (1), grind for 25 minutes, heat up to 75°C and stir for 1.0 hour, and then pulverize with a superfine pulverizer , passed through a 120-mesh sieve to obtain the mixed material, and set aside;

[0043] (3...

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