Solid chemical dust suppression agent and preparation method thereof

A dust suppressant and chemical technology, applied in the field of environmental pollution control, can solve the problems of unpredictable effects, unseen, single function of the dust suppressant, etc., and achieve the effect of preventing dust from flying and facilitating transportation.

Active Publication Date: 2013-09-25
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The function of this type of dust suppressant is often single, only considering the hydrophobicity or hydrophilic physical properties of the dust surface, and often fails to achieve the expected effect
At the same time, these dus

Method used

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  • Solid chemical dust suppression agent and preparation method thereof
  • Solid chemical dust suppression agent and preparation method thereof
  • Solid chemical dust suppression agent and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0029] Prepare the preparation method of solid type chemical dust suppressant of the present invention, comprise the steps:

[0030] First prepare the solid chemical dust suppressant:

[0031] Add 2-5 parts by mass of polyvinyl alcohol and 100 parts of water into the reaction kettle equipped with a stirrer, thermometer and dropping funnel, raise the temperature to 90°C and start the stirrer to stir until the polyvinyl alcohol is completely dissolved Cool down to 60-70°C. Then add 3-10 parts of acrylic acid, 15-35 parts of vinyl acetate and 1 / 3 of 5-15 parts of butyl acrylate, and 0.5-2.5 parts of all emulsifiers to fully emulsify. After 20 minutes, add 0.5-5 parts of initiator for reaction, adjust the temperature to 70-85°C, add the remaining 2 / 3 monomers of acrylic acid, vinyl acetate and butyl acrylate dropwise from the dropping funnel for 2 hours. Then add 1.5-3.5 parts of cross-linking agent solution, 15-40 parts of starch and 10-20 parts of polyacrylamide, and stir to f...

Embodiment 1

[0038] Add 2 parts of polyvinyl alcohol and 100 parts of water into the reaction kettle equipped with a stirrer, thermometer, and dropping funnel, raise the temperature to 90°C and start the stirrer to stir, and cool down to 60°C after the polyvinyl alcohol is completely dissolved. Add 3 parts of acrylic acid, 15 parts of vinyl acetate and 1 / 3 of 15 parts of butyl acrylate, and 0.5 part of emulsifier sodium dodecylbenzenesulfonate to fully emulsify. After 20 minutes, add 0.5 parts of initiator ammonium persulfate to react, adjust the temperature to 85°C, add 2 parts of remaining 2 / 3 monomer acrylic acid, 10 parts of vinyl acetate and 10 parts of butyl acrylate dropwise from the dropping funnel, drop Add time 2h. Add 1.5 parts of cross-linking agent glycerol solution, 15 parts of starch and 20 parts of polyacrylamide, and stir to fully react for 1 hour. The pH of the reaction solution was adjusted to 7 with aqueous sodium hydroxide solution, and the reaction was stopped to obt...

Embodiment 2

[0041] Add 5 parts of polyvinyl alcohol and 100 parts of water into the reaction kettle equipped with a stirrer, thermometer, and dropping funnel, raise the temperature to 90°C and start the stirrer to stir, and cool down to 70°C after the polyvinyl alcohol is completely dissolved. Add 10 parts of acrylic acid, 25 parts of vinyl acetate and 1 / 3 of 5 parts of butyl acrylate, and 2 parts of emulsifier sodium lauryl sulfate to fully emulsify. After 20 minutes, add 1.5 parts of 30% hydrogen peroxide aqueous solution as the initiator to react, adjust the temperature to 70°C, add 6.67 parts of the remaining 2 / 3 monomer acrylic acid, 16.67 parts of vinyl acetate and butyl acrylate dropwise from the dropping funnel 3.34 parts, dropwise time 2h. Add 3.5 parts of cross-linking agent N,N-methylenebisacrylamide, 40 parts of starch and 10 parts of polyacrylamide, and stir to make it fully react for 2 hours. The pH of the reaction solution was adjusted to 7 with aqueous sodium hydroxide so...

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Abstract

The invention discloses a solid chemical dust suppression agent and a preparation method thereof. The method comprises the following preparation processes: mixing 2-5 parts by weight of polyving akohol with 100 parts by weight of water, fully emulsifying 1/3 of 3-10 parts of acrylic acid, 15-35 parts of vinyl acetate and 5-15 parts of butyl acrylate, and 0.5-2.5 parts of emulsifier; adding 0.5-5 parts of initiator; dropwise adding residual 2/3 of acrylic acid, vinyl acetate and butyl acrylate; adding 1.5-3.5 parts of crosslinking agent solution, 15-40 parts of starch and 10-20 parts of polyacrylamide; adjusting PH by sodium hydroxide to obtain milk white thick paste; filtering and drying the milk white thick paste, to obtain white powder of the solid chemical dust suppression agent disclosed by the invention. The solid chemical dust suppression agent disclosed by the invention is convenient to transport and convenient to use, has wetting property and bonding characteristic, and plays the effect of efficiently preventing dust from rising for a long period of time; and a solidified layer is formed on the surface of a powder heap after the solid chemical dust suppression agent as used.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a solid chemical dust suppressant and a preparation method thereof. The dust suppressant is mainly used for suppressing dust generated during mining, stacking and transportation of minerals. Background technique [0002] Dust pollution is one of the public hazards in the world, and the dust pollution of mines is particularly prominent. A large amount of dust will be generated in mining, stockpiling, transportation, processing and other links in mines. Dust poses serious hazards to the atmospheric environment and production safety, and also poses serious occupational disease hazards to workers. [0003] At present, the dust suppression methods developed at home and abroad generally use chemical dust suppressants, whose components mainly include moisturizing and water-retaining surfactants, viscous polymer organic compounds and hygroscopic inorganic salts. Th...

Claims

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Application Information

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IPC IPC(8): C09K3/22C08J3/24C08L3/02C08L33/26C08L31/04C08L33/08C08F218/08C08F220/18C08F220/06
Inventor 胡国和郑化安付东升李欣李应平
Owner SHAANXI COAL & CHEM TECH INST
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