阅读说明：本技术 一种环保防水型煤粘结剂及其制备工艺 (Environment-friendly waterproof briquette binder and preparation process thereof ) 是由 鲁杰 邵水源 庞青涛 于 2020-04-30 设计创作，主要内容包括：本发明提出了一种环保防水型煤粘结剂及其制备工艺,该粘结剂包括淀粉、过氧化氢、硼砂、水,其中,按重量比计算,淀粉占原煤比例的0.5-0.7％,过氧化氢占原煤比例的0.03-0.05％,硼砂占原煤比例的0.03-0.05％,水占原煤比例的0.5-0.9％。利用该型煤粘接剂制备的型煤具有较高的冷、热强度,较好的热稳定性,其冷强度不小于1000/N,落下强度达85％,热稳定性达到86％以上,发热量达到5700卡以上,且灰粉不大于18％,挥发分不大于11.8％,固体碳不小于62％,全硫量不大于0.2/％,防水性在280/N以上,相对于现有技术来说起到了意想不到的技术效果,具有很好的实用性。(The invention provides an environment-friendly waterproof coal binder and a preparation process thereof, wherein the binder comprises starch, hydrogen peroxide, borax and water, wherein the starch accounts for 0.5-0.7% of the raw coal, the hydrogen peroxide accounts for 0.03-0.05% of the raw coal, the borax accounts for 0.03-0.05% of the raw coal and the water accounts for 0.5-0.9% of the raw coal in percentage by weight. The briquette prepared by the briquette adhesive has high cold strength and hot strength and good thermal stability, the cold strength is not less than 1000/N, the drop strength reaches 85%, the thermal stability reaches more than 86%, the heat productivity reaches more than 5700 cards, the ash powder is not more than 18%, the volatile component is not more than 11.8%, the solid carbon is not less than 62%, the total sulfur content is not more than 0.2/%, the waterproofness is more than 280/N, and the briquette adhesive has unexpected technical effects compared with the prior art and has good practicability.)

1. The environment-friendly waterproof briquette binder is characterized in that: comprises starch, hydrogen peroxide, borax and water, wherein the starch accounts for 0.5-0.7% of the raw coal, the hydrogen peroxide accounts for 0.03-0.05% of the raw coal, the borax accounts for 0.03-0.05% of the raw coal and the water accounts for 0.5-0.9% of the raw coal according to weight ratio.

2. The environmentally friendly waterproof briquette binder of claim 1, characterized in that: the coal-fired composite material also comprises bentonite and dextrin, wherein the bentonite accounts for 1.5-3.5% of the raw coal and the dextrin accounts for 0.3-0.5% of the raw coal according to the weight ratio.

3. The environmentally friendly waterproof briquette binder of claim 2, characterized in that: the coal-fired boiler also comprises sodium humate and hydrated lime, wherein the sodium humate accounts for 1-1.4% of the raw coal and the hydrated lime accounts for 0.1-0.5% of the raw coal in percentage by weight.

4. The environmentally friendly waterproof briquette binder of claim 3, characterized in that: the bentonite accounts for 2.5 percent of the raw coal, the dextrin accounts for 0.4 percent of the raw coal, the sodium humate accounts for 1.2 percent of the raw coal, and the hydrated lime accounts for 0.3 percent of the raw coal.

5. The environmentally friendly waterproof briquette binder of claim 3, characterized in that: the content of humic acid in the sodium humate is more than 50 percent.

6. The production process of the environment-friendly waterproof coal binder of claim 3, which is characterized by comprising the following steps: comprises the following sequential steps

S1, sequentially adding starch, hydrogen peroxide and borax into cold water according to a weight ratio, and uniformly stirring to obtain a mixed solution;

s2, heating the mixed solution obtained in the step S1 to 95 ℃, naturally cooling to 65-70 ℃, and preserving heat to obtain starch glue;

s3, adding the starch glue obtained in the step S2 into a stirrer according to the weight ratio of 3-5% of the raw coal, and then sequentially adding bentonite and dextrin into the stirrer according to the proportion to be fully stirred to obtain a finished adhesive.

7. The production process of the environment-friendly waterproof coal binder as claimed in claim 6, wherein the production process comprises the following steps: in step S3

S31, adding bentonite and dextrin into a stirrer, and then adding sodium humate and hydrated lime into the stirrer according to the weight ratio.

8. The production process of the environment-friendly waterproof briquette binder as claimed in claim 7, characterized in that: in step S3

S32, dissolving sodium humate and hydrated lime with a small amount of water in advance, and adding the solution into a stirrer.

Technical Field

The invention relates to the technical field of coal, in particular to an environment-friendly waterproof briquette adhesive and a preparation process thereof.

Background

China is not only the first large producing country of world coal but also the first large consuming country, and the coal accounts for 76% and 69% of the total amount of primary energy production and consumption in China. The characteristics of the energy structure in China determine that the energy structure in China is mainly based on coal in a long period of time in the future. More than 80% of coal consumption in China is used for direct combustion, but because the coal quality is not high on the whole, the specific gravity of high-sulfur and high-ash coal is large in China, a series of environmental problems can be generated inevitably due to the large use of coal, for example, sulfur dioxide which is a main component damaging acid rain of 30% of the total area of China, more than 90% of coal is from coal combustion, in order to fully utilize the existing coal resources and reduce the pollution of coal to the environment, the research and development of the coal briquette are paid attention to all countries in the world, the key of the wide application of the coal briquette technology is the adhesive, in order to produce high-quality coal briquettes, all countries in the world have researched hundreds of adhesives, and the developed coal briquette adhesives can be divided into three types, namely organic adhesives, inorganic adhesives and composite adhesives according to the chemical states.

Disclosure of Invention

Aiming at the problems and the defects in the prior art, the invention aims to provide an environment-friendly waterproof coal binder and a preparation process thereof.

The technical scheme of the invention is realized as follows: the environment-friendly waterproof briquette binder comprises starch, hydrogen peroxide, borax and water, wherein the starch accounts for 0.5-0.7% of the raw coal, the hydrogen peroxide accounts for 0.03-0.05% of the raw coal, the borax accounts for 0.03-0.05% of the raw coal, and the water accounts for 0.5-0.9% of the raw coal.

As a preferable embodiment, the coal-saving agent further comprises bentonite and dextrin, wherein the bentonite accounts for 1.5-3.5% of the raw coal, and the dextrin accounts for 0.3-0.5% of the raw coal in percentage by weight.

The coal mine further comprises sodium humate and hydrated lime, wherein the sodium humate accounts for 1-1.4% of the raw coal and the hydrated lime accounts for 0.1-0.5% of the raw coal in percentage by weight.

In a preferred embodiment, the bentonite accounts for 2.5% of the raw coal, the dextrin accounts for 0.4% of the raw coal, the sodium humate accounts for 1.2% of the raw coal, and the hydrated lime accounts for 0.3% of the raw coal.

As a preferred embodiment, the content of humic acid in the sodium humate is more than 50%.

The production process of the environment-friendly waterproof briquette adhesive is characterized by comprising the following steps: comprises the following sequential steps

S1, sequentially adding starch, hydrogen peroxide and borax into cold water according to a weight ratio, and uniformly stirring to obtain a mixed solution;

s2, heating the mixed solution obtained in the step S1 to 95 ℃, naturally cooling to 65-70 ℃, and preserving heat to obtain starch glue;

s3, adding the starch glue obtained in the step S2 into a stirrer according to the weight ratio of 3-5% of the raw coal, and then sequentially adding bentonite and dextrin into the stirrer according to the proportion to be fully stirred to obtain a finished adhesive.

As a preferred embodiment, in step S3

S31, adding bentonite and dextrin into a stirrer, and then adding sodium humate and hydrated lime into the stirrer according to the weight ratio.

As a preferred embodiment, in step S3

S32, dissolving sodium humate and hydrated lime with a small amount of water in advance, and adding the solution into a stirrer.

After the technical scheme is adopted, the invention has the beneficial effects that: the adhesive disclosed by the invention can simultaneously meet the requirements of high cold and hot strength, good waterproofness, low ash content and no secondary pollution through actual detection, various raw materials in the adhesive are low in price and wide in source, the production process is simple, and compared with the cost of lump coal, the cost of pulverized coal is not increased too much by using the adhesive with low price and high efficiency, the pulverized coal serving as 'waste' can be fully utilized, the waste of resources is reduced, and the pollution of dust caused by the pulverized coal to the environment is reduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention firstly provides a production process of an environment-friendly waterproof coal binder, which comprises the following sequential steps

S1, adding starch, hydrogen peroxide and borax to cold water in sequence according to a weight ratio, and uniformly stirring to obtain a mixed solution, wherein the starch accounts for 0.5-0.7% of the raw coal, the hydrogen peroxide accounts for 0.03-0.05% of the raw coal, the borax accounts for 0.03-0.05% of the raw coal, and the water accounts for 0.5-0.9% of the raw coal;

s2, heating the mixed solution obtained in the step S1 to 95 ℃, naturally cooling to 65-70 ℃, and preserving heat to obtain starch glue;

s3, adding the starch glue obtained in the step S2 into a stirrer according to the weight ratio of the raw coal being 3-5%, and then sequentially adding bentonite and dextrin into the stirrer according to the proportion to be fully stirred, wherein the bentonite accounts for 1.5-3.5% of the raw coal and the dextrin accounts for 0.3-0.5% of the raw coal according to the weight ratio.

S4, adding sodium humate and hydrated lime into the stirrer to be fully stirred in the step S3, wherein the sodium humate accounts for 1-1.4% of the raw coal, the hydrated lime accounts for 0.1-0.5% of the raw coal, the content of humic acid in the sodium humate is more than 50%, and the sodium humate and the hydrated lime can be dissolved in a small amount of water in advance to finally obtain the finished adhesive.

The compounding ratios of the various examples are shown below, wherein the components of the raw materials in examples 1, 2 and 3 are the weight ratios of the raw coal.

After actual measurement, the adhesive of the embodiment 2 has a good technical effect, and can effectively avoid the damage of clean coal in the transportation, loading and unloading processes caused by the strength reduction caused by the absorption of a small amount of moisture in the air; the pollution of dust caused by the pulverized coal to the environment is reduced. The briquette prepared by the briquette adhesive has high cold strength and hot strength and good thermal stability, the cold strength is not less than 1000/N, the drop strength reaches 85%, the thermal stability reaches more than 86%, the heat productivity reaches more than 5700 cards, the ash powder is not more than 18%, the volatile component is not more than 11.8%, the solid carbon is not less than 62%, the total sulfur content is not more than 0.2/%, the waterproofness is more than 280/N, and the briquette adhesive has unexpected technical effects compared with the prior art and has good practicability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.