阅读说明：本技术 一种用于立磨的生料助磨剂及制备方法 (Raw material grinding aid for vertical mill and preparation method thereof ) 是由 李兴 谭贝 李�权 于 2019-09-03 设计创作，主要内容包括：本发明实施例提供了一种用于立磨的生料助磨剂及制备方法。本发明实施例提供的生料助磨剂,助磨效果好,45μm方孔筛筛余百分数低至11.3％,相同电耗下,台时产量增加达到155t/h,熟料28d强度达到近50MPa,本发明实施例提供的生料助磨剂的制备方法,工艺简单,仅需提前制备聚合多元醇胺,制备条件不苛刻,易于产业化推广。(the embodiment of the invention provides a raw material grinding aid for vertical grinding and a preparation method thereof. The raw material grinding aid provided by the embodiment of the invention has a good grinding aid effect, the screen residue percentage of a 45-micron square-hole screen is as low as 11.3%, the hourly output is increased to 155t/h under the same power consumption, the 28d strength of clinker is nearly 50MPa, and the preparation method of the raw material grinding aid provided by the embodiment of the invention has the advantages of simple process, only need of preparing polymeric polyalcohol amine in advance, mild preparation conditions and easiness in industrial popularization.)

1. A raw material grinding aid for a vertical mill is characterized by comprising the following components in percentage by mass

5 to 30 percent of polymerized polyalcohol amine,

2 to 20 percent of diethylene glycol,

5 to 30 percent of glycerin,

2 to 15 percent of molasses,

The balance being water.

2. The raw grinding aid of claim 1, comprising the following components in percentage by mass

8 to 25 percent of polymerized polyalcohol amine,

6 to 15 percent of diethylene glycol,

5 to 30 percent of glycerin,

2 to 10 percent of molasses,

The balance being water.

3. the raw grinding aid as claimed in claim 2, which comprises 5-10% by mass of sodium phosphate.

4. A raw grinding aid as claimed in claim 1 or 2, wherein the polymeric polyalcohol amine is prepared by polymerization reaction of itaconic acid, acrylonitrile and diethanolamine.

5. The raw grinding aid as claimed in claim 4, wherein the mass ratio of itaconic acid, acrylonitrile and diethanolamine is 3:2: 1.

6. the raw grinding aid as claimed in claim 4, wherein the polymerization temperature is 50-70 ℃.

7. The raw grinding aid as claimed in claim 4, wherein the polymerization reaction time is 1.5-2.5 h.

8. The preparation method of the raw material grinding aid as claimed in any one of claims 1 to 7, which is characterized in that the preparation method comprises the following steps: weighing the polymeric polyalcohol amine, the diethylene glycol, the glycerol, the molasses and the water according to the proportion, and sequentially adding the polymeric polyalcohol amine, the diethylene glycol, the glycerol and the molasses into the water for uniformly mixing.

Technical Field

The invention belongs to the technical field of concrete, and particularly relates to a raw material grinding aid for a vertical mill and a preparation method thereof.

Background

in the cement production process, raw materials need to be powdered. The raw material grinding is a process of changing bulk materials into fine powder by overcoming the stress and cohesion between particles when the materials are deformed through impact, extrusion, grinding and the like under the action of external force.

the raw meal powder is a basic link in the cement production process, and has great influence on the subsequent links. For example, in the subsequent clinker firing process, the quality of raw meal grinding can affect the coal consumption, the power consumption, the quality and the pollutant emission of the clinker, which are large items of the cost of the clinker, and the superposition benefit can be greatly improved. Therefore, the promotion of the raw grinding aid is fundamentally the multi-functionalization of the raw grinding aid to the next process.

With the development of grinding machinery technology, the vertical mill gradually becomes the first choice equipment for grinding powder in the cement industry. However, because the vertical mill uses the batch grinding principle to grind the materials, and the materials are conveyed by hot air, the existing raw material grinding aid can be vaporized in the process of high-temperature gas and dispersion circulation, and is difficult to achieve the grinding-aid effect, so a new raw material grinding aid still needs to be developed to ensure the grinding-aid performance of the raw material grinding aid in the process of preparing raw materials by the vertical mill, reduce the coal consumption, the power consumption and the pollutant emission of clinker, and finally improve the quality of clinker.

Disclosure of Invention

in order to solve the problem that the grinding aid is difficult to grind due to vaporization of the raw grinding aid in the process of high-temperature gas and dispersion circulation in the prior art, one of the purposes of the embodiment of the invention is to provide the raw grinding aid for vertical grinding. The second purpose of the embodiment of the invention is to provide a preparation method of the raw grinding aid.

In order to achieve the purpose, the embodiment of the invention adopts the following technical scheme:

a raw material grinding aid for a vertical mill comprises the following components in percentage by mass

5 to 30 percent of polymerized polyalcohol amine,

2 to 20 percent of diethylene glycol,

5 to 30 percent of glycerin,

2 to 15 percent of molasses,

The balance being water.

In the formula, the polymerized polyalcohol amine and the diethylene glycol have the function of improving the grinding efficiency; the glycerol has excellent grinding-aiding effect and participates in the polymerization reaction; the molasses has the functions of toning and changing the grading distribution of the ground particles.

preferably, the composition comprises the following components in percentage by mass

8 to 25 percent of polymerized polyalcohol amine,

6 to 15 percent of diethylene glycol,

5 to 30 percent of glycerin,

2 to 10 percent of molasses,

The balance being water.

Further preferably, the sodium phosphate accounts for 5-10% by mass.

On one hand, the sodium phosphate has excellent grinding aid effect, and on the other hand, the sodium phosphate can be used as a stabilizer to improve the boiling point of the raw material grinding aid and prevent vaporization.

Preferably, the polymeric polyalcohol amine is prepared by polymerization reaction of itaconic acid, acrylonitrile and diethanolamine.

The molecular interior of the itaconic acid contains two active carboxyl groups and a double bond, the double bond and the carboxyl group are in a conjugated relation, so that the itaconic acid has very active property, can be polymerized with other monomers with different numbers to form a polymer, and can be widely applied to the chemical synthesis industry. Various addition reactions, esterification reactions and polymerization reactions can be carried out. The propylene cyanide has active chemical properties, is easy to polymerize and can generate copolymerization reaction with the itaconic acid. Diethanolamine is a raw material for synthesizing polymeric polyalcohol amine monomers and surfactants.

further preferably, the mass ratio of the itaconic acid to the acrylonitrile to the diethanolamine is 3:2: 1.

further preferably, the temperature of the polymerization reaction is 50 to 70 ℃.

Even more preferably, the temperature of the polymerization reaction is 60 ℃.

Further preferably, the time of the polymerization reaction is 1.5-2.5 h.

Even more preferably, the polymerization time is 2 h.

The preparation method of the raw material grinding aid comprises the following steps: weighing the polymeric polyalcohol amine, the diethylene glycol, the glycerol, the molasses and the water according to the proportion, and sequentially adding the polymeric polyalcohol amine, the diethylene glycol, the glycerol and the molasses into the water for uniformly mixing.

The embodiment of the invention has the beneficial effects

1. the raw material grinding aid provided by the embodiment of the invention has good grinding aid effect, the percent of the residue on a 45-micron square-hole sieve is as low as 11.3 percent, the hourly output is increased to 155t/h under the same power consumption, and the 28d strength of clinker is close to 50 MPa;

2. The preparation method of the raw material grinding aid provided by the embodiment of the invention has simple process, only needs to prepare the polymeric polyalcohol amine in advance, has non-harsh preparation conditions and is easy for industrial popularization.

Detailed Description

the embodiment of the invention provides a raw material grinding aid for vertical grinding and a preparation method thereof.

In order to better understand the above technical solutions, the above technical solutions will be described in detail with reference to specific embodiments.