CN101899283A

CN101899283A - Method for preparing dust suppressant for coal dust transportation, loading and unloading

Info

Publication number: CN101899283A
Application number: CN2009101434488A
Authority: CN
Inventors: 李汉江; 孟庆铨
Original assignee: CENTURY HANYUAN (BEIJING) SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: CENTURY HANYUAN (BEIJING) SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2009-05-26
Filing date: 2009-05-26
Publication date: 2010-12-01

Abstract

The invention discloses a dust suppressant for suppressing coal dust by spraying operation in high-speed transportation, loading and unloading. The dust suppressant comprises the following components in percentage by weight: 40 to 60 percent of powdery instant polyving akohol, 10 to 20 percent of starch ether, 0.5 to 5 percent of K12, 10 to 30 percent of high molecular weight polyacrylamide and 0.1 to 1 percent of UV resistant agent. When used, the dust suppressant is diluted by cold water in a ratio of 1 to 200-400.

Description

A kind of manufacture method that is used for the dust-inhibitor of coal dust transportation and loading and unloading

The invention belongs to the tamanori class, specifically relate to a kind ofly in loading and unloading and transportation coal dust process, be a kind of dust suppression membrane-forming agent that prevents that the coal dust dusting polluting environment is developed in the process of running at high speed.

Along with the generally enhancing of environmental consciousness, people more and more pay attention to dust pollution.Especially show stirring up a cloud of dust of causing in the process such as transportation, loading and unloading of demolishing buildings and building waste and building sandstone, people abhor invariably.The current method that generally adopts is a water spray, and this effect can only be of short duration effect.Along with the very fast evaporation of water, dust fills the air again.So not only wasted precious water resource, effect is also undesirable.And in a large amount of Coal Transport links, coal dust is blown to such an extent that dance in the air with car on the transport trolley of running at high speed especially, makes the railway both sides be filled with coal ash, causes the waste of environmental pollution and coal dust resource very surprising.

Develop a kind of dust-inhibitor that can on the transport trolley of running at high speed, spray, must possess following five conditions:

1, under minimum 30 kilometers speed, spray and be not blown away;

2, anti-freezing should be able to be sprayed under subzero-10 ℃ of conditions;

3, dust-inhibitor requires transportation and uses all to make things convenient for, and direct water can spray towards rare during use;

4, neutral, environmental protection can not have acid-basicity or organic volatile, human body skin and breathing are not had corrosion, damage;

5, there is not any influence the spray back to ature of coal, to the not influence of Coal Transport safety.

The coal dust dust-inhibitor kind of selling on market is many, also has from external import.Usually be divided into two big classes, a class is a latex, is to be placed on the transport trolley with the barreled form, and water is towards rare direct spray during use; A kind of is pulverous, water is towards rare during use, or 100 times or 200 times do not waited, the said products mostly is the emulsion of high molecular polymer, as pure-acrylic emulsion, organosilicon crylic acid latex, vinyl acetate emulsion etc., adding film coalescence aid, tensio-active agent etc., in fact is exactly a kind of expansion utilization of coating.And pulverous dust-inhibitor also is to belong to dry-mix series products or starch based product, Chinese patent application number is that 200710063294 and 200710063293 to disclose two pieces of patents " a kind of coal surface solidifying agent and preparation method thereof " " a kind of environment protecting type coal surface solidifying agent and preparation method thereof " be exactly a kind of milk sap, adopt polyvinyl alcohol as membrane-forming agent, Sumstar 190 is that tackiness agent is prepared from, and these methods do not reach above-mentioned requirement of generally acknowledging dust-inhibitor; It is that the coal dust dust-inhibitor of main body preparation can play moisture-keeping function with magnesium chloride and calcium chloride that Chinese patent discloses another kind of, and CN1381594A can be antifreeze, but can not film forming, and the time spent will spill a lot, just can play humidity-holding effect.In addition, they all are milk sap, use and carry equal inconvenience.

The present invention tightly centers on above-mentioned 5 basic demands, the powdery dust-inhibitor that produces antifreeze, the anti-strong illumination of a kind of neutrality, the corrosion of pollution-free nothing and be convenient for carrying.

Design philosophy of the present invention realizes by following design:

With instant polyvinyl alcohol as 1788,2488 grades as the tackiness membrane-forming agent, this rubber powder can be dissolved into transparent thick liquid in cold water; Suitable viscosity was just arranged at 1～5% o'clock; Starch ethers easily is dissolved in water and sizable viscosity is arranged as a kind of film coalescence aid; Here can not adopt starch or dextrin, their viscosity little and when the water yield is excessive viscosity reduce on the contrary; Adopt cats product K12 (sodium lauryl sulphate) or AE0-9 as frostproofer, effect is very good, has increased wetting infiltration function again, as long as water does not freeze dust-inhibitor is used under-10 ℃ of situations.With the concentration that the high molecular absorbent material is regulated the dust-inhibitor after rare as: polyacrylamide (molecular weight is about 40000) as water-holding agent or thickening material, make its can on the transport trolley per hour to spray under 30 kilometers the speed; By the design of above-mentioned prescription, can assert that product is neutral, human body or respiratory system there are not injury, be a kind of ideal coal dust transportation dust-inhibitor.Characteristics of the present invention are to replace with quick-dissolving polyvinyl alcohol and polymer water-holding agent the polyvinyl alcohol of traditional indissoluble, add water-holding agent and can make the rete can very fast drying, and increased antifreeze and anti-ultraviolet function, thereby reached the basic demand that dust-inhibitor is made.

Proportioning of the present invention is (by weight ratio) that carries out as follows:

The instant polyvinyl alcohol 40～60% of powdery;

Starch ethers 10～20%;

K12 (sodium lauryl sulphate) 0.5～5%; (or AE0-9)

High molecular weight polyacrylamide 10～30%;

Anti UV agent UV-9, UV-12 0.1～1%

Should be when specifically using by above-mentioned prescription towards rare 200～400 water.

Specific embodiments of the invention are:

1, be the instant polyvinyl alcohol 44% of powdery by proportioning;

Starch ethers 20%;

Polyacrylamide 30%;

K12 (trade(brand)name) 5%;

UV-9 (trade(brand)name) 1%.

2, be the instant polyvinyl alcohol 60% of powdery by proportioning;

Starch ethers 10%

Polyacrylamide 25%;

AEO-9 (trade(brand)name) 4%;

UV-12 (trade(brand)name) 1%.

Get final product by the thorough mixing pack in mixing machine of above-mentioned prescription, but guard against damp, rainproof; The dust-inhibitor performance index of making by the present invention are as follows:

Project	Performance index	Conformance with standard
			Outward appearance	White powder has no irritating odor
25 ℃/mPa.s of viscosity	≥5	GB-/T10247
			PH value	6～8	GB/T14518
Solid content	≤1％	GB/T2793
			To steel, aluminium, lacquer, rubber corrosiveness	≤1×10 ^-4mg，cm ²/h	GB/T7901，1690，0084
To skin irritation	/	GB/T21604
			Incendivity	Do not burn	GB/T261
Heavy metal content	≤0.1	GB/T7415，7466

Dust-inhibitor organic volatile assay of the present invention is as follows:

Total phenol≤0.5 meets GB/T7485

Formaldehyde≤5 meet 13197-1991

The present invention is to the influence of Coal Quality:

Heating value of coal≤0.1%;

Ash content of coal≤4%.

As seen coal dust depressor of the present invention meets the environmental requirement of country to the transportation coal of the Ministry of Railways fully.

The present invention can also be used to remove waste and old buildings and transport the site operation and the transportation of building waste, loading and unloading sandstone material, and its anti-dust effect is obvious, and moisture preserving time is not less than 36 hours, and odorlessness, pollution-free; Thereby greatly reduced the harm of dust to environment and human body.Extend its effect and can also be used for the exploitation in ore deposit, silica field, reduce the soakage of human body, the generation that alleviates silicosis the silicon ore in sand form.

Claims

1. one kind is used for the dust-inhibitor that coal dust transports and loads and unloads, and it is characterized in that:

Be by weight ratio:

The instant polyvinyl alcohol 40～60% of powdery;

Starch ethers 10～20%;

K12 (sodium lauryl sulphate) 0.5～5%;

High molecular weight polyacrylamide 10～30%;

Anti UV agent 0.1～1%.

2. dust-inhibitor according to claim 1 is characterized in that described anti UV agent can be UV-9 or UV--12;

3. dust-inhibitor according to claim 1, during use with cold water doubly towards rare 200-400.