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Method for preparing dust suppressing covering agent

A technology of covering agent and dust suppressant, applied in the field of preparation of dust suppressing covering agent, to achieve the effect of reducing transportation cost, wide sources, convenient storage and transportation

Inactive Publication Date: 2012-07-11
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, quite a lot of covering agents (dust sealing agents) do not consider the addition of surfactants in the formulation system, which will affect the covering protection effect during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of dust-suppressing covering agent, carry out according to the following steps:

[0031] (1) Prepare raw materials according to the weight ratio of each component, among them, cornstarch 8kg, water 40kg, acrylic acid 15Kg, 30% sodium hydroxide 35Kg, epichlorohydrin: 2kg, 30% hydrogen peroxide: 8kg;

[0032] (2) Mix 15kg of acrylic acid and 35kg of 30% sodium hydroxide to prepare a sodium acrylate solution, and put it into a sodium acrylate storage tank for later use;

[0033] (3) Put 8kg of cornstarch and 40kg of water into the reaction kettle and mix evenly, then put it into the starch slurry storage tank;

[0034] (4) The starch slurry is pumped into the stirring reactor by the starch slurry pump, heated to 75°C and gelatinized at constant temperature for 1 hour;

[0035] (5) Stop heating, let the temperature in the stirred reactor drop to 45°C, then keep the temperature constant, and replace the air in the reactor with nitrogen;

[0036...

Embodiment 2

[0041] A kind of preparation method of dust-suppressing covering agent, carry out according to the following steps:

[0042] (1) Prepare raw materials according to the weight ratio of each component, among them, potato starch 3kg, water 35 kg, acrylic acid 10Kg, 30% sodium hydroxide 30 Kg, glycerol: 1kg, 2% potassium persulfate aqueous solution: 5kg;

[0043] (2) Mix 10kg of acrylic acid and 30kg of 30% sodium hydroxide to prepare sodium acrylate solution;

[0044] (3) Put 3kg of potato starch and 35kg of water into the reaction kettle and mix evenly, then put it into the starch slurry storage tank;

[0045] (4) Pump the starch slurry into the stirring reactor by the starch slurry pump, heat it to 80°C and gelatinize at a constant temperature for 1 hour; heat it to 75°C and then gelatinize at a constant temperature for 1 hour;

[0046] (5) Stop heating, lower the temperature in the reactor to 45°C and then keep the temperature constant, and replace the air in the reactor with...

Embodiment 3

[0052] A kind of preparation method of dust-suppressing covering agent, carry out according to the following steps:

[0053] (1) Prepare raw materials according to the weight ratio of each component, including 10kg of wheat potato starch, 50kg of water, 20Kg of acrylic acid, 40Kg of 30% sodium hydroxide, and 1-3% N,N-methylenebisacrylamide aqueous solution : 5kg, 1%~3% sodium sulfite and 1%~3% ferrous ammonium sulfate mixed aqueous solution: 15kg;

[0054] (2) Mix 20kg of acrylic acid and 40kg of 30% sodium hydroxide to prepare sodium acrylate solution;

[0055] (3) Put 10kg of wheat potato starch and 50kg of water into the reaction kettle and mix evenly, then put it into the starch slurry storage tank;

[0056] (4) Pump the starch slurry into the stirring reactor by the starch slurry pump, heat it to 80°C and gelatinize at a constant temperature for 1 hour; heat it to 75°C and then gelatinize at a constant temperature for 1 hour;

[0057] (5) Stop heating, lower the tempera...

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Abstract

The invention relates to a method for preparing a dust suppressing covering agent, comprising the following steps: preparing raw materials including 3-10 parts of natural starch, 35-50 parts of water, 10-20 parts of acrylic acid, 30-40 parts of 30% sodium hydroxide, 1-5 parts of cross-linking agent and 5-15 parts of initiator; mixing the acrylic acid and the 30% sodium hydroxide to prepare sodium acrylate solution, and filling the sodium acrylate solution into a sodium acrylate solution storage tank for later use; fully mixing the natural starch and the water, and filling starch slurry into a starch slurry storage tank; pumping the starch slurry into a stirring reactor by using a starch slurry pump, heating for 75-80 DEG C by using a clamp sleeve of the stirring reactor, and gelatinizing for 1 hour at constant temperature; stopping heating, decreasing the temperature in the stirring reactor to 45-50 DEG C, keeping the temperature constant, and introducing nitrogen into the stirring reactor to replace the air inside the stirring reactor; adding the prepared sodium acrylate solution, the initiator and the cross-linking agent into the stirring reactor in sequence, introducing nitrogen into the stirring reactor continuously, and the stirring slowly for reaction of 3 hours at constant temperature.

Description

technical field [0001] The invention relates to a method for preparing a dust-suppressing covering agent, more specifically, the preparation of a dust-suppressing agent for controlling the flying of dust such as coal powder, mineral powder, slag transportation, municipal construction, open-pit mining, and bare ground. method. Background technique [0002] my country is a big country of coal production and consumption. Every year, a large amount of coal is transported from the place of production to the place of consumption by means of transportation such as trains and automobiles. During the transportation, a large amount of coal dust will be generated, which not only pollutes the environment, but also leads to a large amount of coal loss. In addition, due to the large volume of transportation and the high density of trains, the coal dust caused by the strong airflow caused by the train passing through the tunnel not only seriously pollutes the tunnel environment, but also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L51/02C08F251/00C09K3/22
Inventor 廖传华王重庆陈海军朱跃钊杨丽
Owner NANJING TECH UNIV
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