阅读说明：本技术 一种改善型助磨剂 (Improved grinding aid ) 是由 余明成 杨冰凌 崔永平 王龙 吕向军 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种改善型助磨剂,所述改善型助磨剂组成成分包括：三乙醇胺、木质素磺酸钠、氯化钠、糖醚、醋酸钠、氯化钾、硫酸氢钠和除铬剂,所述三乙醇胺投入量为180-220g/L、糖醚投入量为50-80g/L、磷酸钠投入量为5-10g/L、木质素磺酸钠投入量为30-50g/L、氯化钠投入量为120-150g/L、醋酸钠投入量为50-80g/L、氯化钾投入量为20-30g/L、硫氰酸钠投入量为30-50g/L、除铬剂投入量比例为0.9％。本发明在助磨剂中添加除铬剂,通过除铬剂将磨料中的六价铬离子去除,使得生产的水泥物料中有害物质水溶性六价铬含量减低,并符合国家标准范围。(The invention discloses an improved grinding aid, which comprises the following components: the chromium removal agent comprises triethanolamine, sodium lignosulphonate, sodium chloride, sugar ether, sodium acetate, potassium chloride, sodium bisulfate and a chromium removal agent, wherein the input amount of the triethanolamine is 180-220g/L, the input amount of the sugar ether is 50-80g/L, the input amount of the sodium phosphate is 5-10g/L, the input amount of the sodium lignosulphonate is 30-50g/L, the input amount of the sodium chloride is 120-150g/L, the input amount of the sodium acetate is 50-80g/L, the input amount of the potassium chloride is 20-30g/L, the input amount of the sodium thiocyanate is 30-50g/L, and the input amount proportion of the chromium removal agent is 0.9%. According to the invention, the chromium removing agent is added into the grinding aid, and hexavalent chromium ions in the grinding material are removed through the chromium removing agent, so that the content of harmful substance water-soluble hexavalent chromium in the produced cement material is reduced, and the cement material meets the national standard range.)

1. An improved grinding aid, which is characterized in that: the improved grinding aid comprises the following components: the chromium removal agent comprises triethanolamine, sodium lignosulphonate, sodium chloride, sugar ether, sodium acetate, potassium chloride, sodium bisulfate and a chromium removal agent, wherein the input amount of the triethanolamine is 180-220g/L, the input amount of the sugar ether is 50-80g/L, the input amount of the sodium phosphate is 5-10g/L, the input amount of the sodium lignosulphonate is 30-50g/L, the input amount of the sodium chloride is 120-150g/L, the input amount of the sodium acetate is 50-80g/L, the input amount of the potassium chloride is 20-30g/L, the input amount of the sodium thiocyanate is 30-50g/L, and the input amount proportion of the chromium removal agent is 0.9%.

2. An improved grinding aid as defined in claim 1 wherein: the hydroxyethyl number in the alcohol amine organic matters in the triethanolamine is increased, so that the angle of repose in the cement powder is gradually reduced, and the fluidity is increased;

the grinding aid has effective grinding-aiding effect in the cement grinding process, and can reduce powder particle agglomeration.

3. An improved grinding aid as defined in claim 1 wherein: the sodium lignosulfonate has an aryl nucleus, can show surface activity, and has the action mechanism of weakening the strength of particles and preventing the particles from agglomerating;

in the environment of the mill, the active part of the lignosulfonate molecules adsorbed on the surface of cement clinker particles is contacted with the particle surface, the hydrophobic groups extend to the atmosphere, and the adsorption of attached macromolecules on the particles is facilitated.

4. An improved grinding aid as defined in claim 1 wherein: after the sugar ether is put into the powder system, the sugar ether is used as a grinding aid for slag cement, and after entering the powder system, the accumulation among powder particles can be eliminated, the dispersibility and the flowability among the particles are increased, the retention time of materials in a mill is shortened, the gap filling rate of the materials is reduced, the powder selection efficiency of the powder concentrator is improved, and the resistance during cement conveying is changed.

5. An improved grinding aid as defined in claim 1 wherein: when the input amount of the chromium removing agent is 0.9 percent, two groups of equal-amount cement samples are adopted and input into a grinding machine;

one group of the two groups of control samples is added with 0.9 percent of chromium removing agent in the grinding aid, and the other group is added with the grinding aid without the chromium removing agent; putting the two groups of samples into a grinding machine to perform grinding operation in the same time;

after grinding is finished, taking out samples to respectively detect the chromium content, wherein the chromium content of the sample group mixed with the chromium removing agent is 1.37mg/Kg, and the chromium content of the grinding aid control group without the chromium removing agent is more than 10 mg/Kg.

6. An improved grinding aid as defined in claim 1 wherein: when the input amount of the chromium removing agent is 0.5 percent, two groups of equal-amount cement samples are adopted and input into a grinding machine;

one group of the two groups of control samples is added with 0.5 percent of chromium removing agent in the grinding aid, and the other group is added with the grinding aid without the chromium removing agent; putting the two groups of samples into a grinding machine to perform grinding operation in the same time;

after grinding is finished, taking out samples to respectively detect the chromium content, wherein the chromium content of the sample group mixed with the chromium removing agent is 2.16mg/Kg, and the chromium content of the grinding aid control group without the chromium removing agent is more than 10 mg/Kg.

Technical Field

The invention relates to the technical field of cement production, in particular to an improved grinding aid.

Background

The grinding aid is an additive for improving grinding efficiency, and can be glass beads, quartz sand and the like. The improvement of the grinding efficiency and the reduction of the power consumption of the grinding operation are effective means for improving the economic benefit of cement enterprises, and in order to achieve the purpose, domestic cement enterprises generally adopt two measures: firstly, the structure of a grinding machine is improved, and the technological process and the mode of the grinding are improved so that more mechanisms can act on materials through grinding media; in the other method, a trace or small amount of additive, namely grinding aid, is added in the grinding process to influence the mechanical and chemical processes in the grinding operation, so that the aim of improving the grinding efficiency is fulfilled. The latter has the advantages of less investment, quick effect, simple operation, capability of improving the physical properties of cement and the like, and is more and more emphasized.

Through mass search, the prior art with the publication number of CN108947312A is found, and the invention discloses an early-strength functional grinding aid, belonging to the technical field of building materials. The invention comprises water, diethanol monoisopropanolamine (DEIPA), Sodium Tripolyphosphate (STPP), molasses and propylene glycol, and the raw materials in parts by weight are as follows: 60-80 parts of water, 0-20 parts of diethanol monoisopropanolamine (DEIPA), 0-20 parts of Sodium Tripolyphosphate (STPP), 0-20 parts of molasses and 0-5 parts of propylene glycol. The early-strength functional grinding aid has a simple and reasonable formula, is good in grinding aiding effect, effectively improves grinding efficiency, reduces grinding energy consumption, can improve early strength of cement, is obvious in early-strength effect, and meets the use requirement of buildings.

In conclusion, the existing cement materials contain water-soluble harmful substances of hexavalent chromium, which cannot be effectively removed, so that the hexavalent chromium which does not meet the national standard is less than or equal to 10mg/kg, and the cement with the harmful substances can cause harm to the health of the holy body of people.

Disclosure of Invention

The invention aims to provide an improved grinding aid to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: an improved grinding aid comprising: the chromium removal agent comprises triethanolamine, sodium lignosulphonate, sodium chloride, sugar ether, sodium acetate, potassium chloride, sodium bisulfate and a chromium removal agent, wherein the input amount of the triethanolamine is 180-220g/L, the input amount of the sugar ether is 50-80g/L, the input amount of the sodium phosphate is 5-10g/L, the input amount of the sodium lignosulphonate is 30-50g/L, the input amount of the sodium chloride is 120-150g/L, the input amount of the sodium acetate is 50-80g/L, the input amount of the potassium chloride is 20-30g/L, the input amount of the sodium thiocyanate is 30-50g/L, and the input amount proportion of the chromium removal agent is 0.9%.

Preferably, the hydroxyethyl number in the alcohol amine organic matters in the triethanolamine is increased, so that the angle of repose in the cement powder is gradually reduced, and the fluidity is increased;

the grinding aid has effective grinding-aiding effect in the cement grinding process, and can reduce powder particle agglomeration.

Preferably, the sodium lignosulfonate has an aryl core, which may exhibit surface activity, with the mechanism of weakening the strength of the particles and preventing agglomeration of the particles;

in the environment in the mill, the active part of the lignosulfonate molecules adsorbed on the surface of cement clinker particles is contacted with the particle surface, the hydrophobic groups extend to the atmosphere, the adsorption on the particles belongs to macromolecule adsorption, and the adsorption is facilitated when the polymerization degree of lignin is low because the cement particles have cracks and are not smooth.

Preferably, after the sugar ether is added, the sugar ether is used as a grinding aid of slag cement and enters a powder system, so that the accumulation among powder particles can be eliminated, the dispersibility and the flowability among the particles can be increased, the retention time of materials in a mill can be shortened, the gap filling rate of the materials can be reduced, the powder selection efficiency of a powder selecting machine can be improved, and the resistance of cement conveying can be changed.

Preferably, when the input amount of the chromium removing agent is 0.9%, two groups of equal-amount cement samples are adopted and input into a mill;

one group of the two groups of control samples is added with 0.9 percent of chromium removing agent in the grinding aid, and the other group is added with the grinding aid without the chromium removing agent; putting the two groups of samples into a grinding machine to perform grinding operation in the same time;

after grinding is finished, taking out samples to respectively detect the chromium content, wherein the chromium content in the sample group mixed with the chromium removing agent is 1.37mg/Kg, and the chromium content in the grinding aid control group without the chromium removing agent is more than 10 mg/Kg.

Preferably, when the input amount of the chromium removing agent is 0.5%, two groups of equal-amount cement samples are adopted and input into a mill;

one group of the two groups of control samples is added with 0.5 percent of chromium removing agent in the grinding aid, and the other group is added with the grinding aid without the chromium removing agent; putting the two groups of samples into a grinding machine to perform grinding operation in the same time;

after grinding is finished, taking out samples to respectively detect the chromium content, wherein the chromium content in the sample group mixed with the chromium removing agent is 2.16mg/Kg, and the chromium content in the grinding aid control group without the chromium removing agent is more than 10 mg/Kg.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the chromium removing agent capable of removing hexavalent chromium is added into the traditional grinding aid, the chromium removing agent can be added in the process of grinding, the hexavalent chromium element in the grinding material can be taken out, the grinding aid can be ensured to improve the grinding flow, the production speed of the grinding material can be increased, the cement grinding material can be compounded with the national standard, and the grinding material can be put into use.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below clearly and completely in connection with 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for the convenience of description and simplification of the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention provides two embodiments:

the first embodiment is as follows:

an improved grinding aid, which comprises the following components: triethanolamine, sodium lignosulfonate, sodium chloride, sugar ether, sodium acetate, potassium chloride, sodium bisulfate and a chromium removing agent, wherein the input amount of the triethanolamine is 180-220g/L, the input amount of the sugar ether is 50-80g/L, the input amount of the sodium phosphate is 5-10g/L, the input amount of the sodium lignosulfonate is 30-50g/L, the input amount of the sodium chloride is 120-150g/L, the input amount of the sodium acetate is 50-80g/L, the input amount of the potassium chloride is 20-30g/L, the input amount of the sodium thiocyanate is 30-50g/L, and the input amount proportion of the chromium removing agent is 0.9%.

The hydroxyethyl number in the alcamines organic matters in the triethanolamine is increased, so that the angle of repose in the cement powder is gradually reduced, and the fluidity is increased;

the grinding aid has effective grinding-aiding effect in the cement grinding process, and can reduce powder particle agglomeration.

Sodium lignosulfonate has an aryl nucleus, can exhibit surface activity, and has the action mechanism of weakening the strength of particles and preventing the particles from coalescing;

in the environment in the mill, the active part of the lignosulfonate molecules adsorbed on the surface of cement clinker particles is contacted with the particle surface, the hydrophobic groups extend to the atmosphere, the adsorption on the particles belongs to macromolecule adsorption, and the adsorption is facilitated when the polymerization degree of lignin is low because the cement particles have cracks and are not smooth.

After the sugar ether is added, the mixture is used as a grinding aid of slag cement, and after entering a powder system, the accumulation among powder particles can be eliminated, the dispersibility and the flowability among the particles are increased, the retention time of materials in a mill is shortened, the gap filling rate of the materials is reduced, the powder selection efficiency of a powder selecting machine is improved, and the resistance of cement conveying is changed.

Example two:

when the input amount of the chromium removing agent is 0.9 percent, two groups of equal-amount cement samples are adopted and input into a grinding machine;

one group of the two groups of control samples is added with 0.9 percent of chromium removing agent in the grinding aid, and the other group is added with the grinding aid without the chromium removing agent; putting the two groups of samples into a grinding machine to perform grinding operation in the same time;

after grinding is finished, taking out samples to respectively detect the chromium content, wherein the chromium content in the sample group mixed with the chromium removing agent is 1.37mg/Kg, and the chromium content in the grinding aid control group without the chromium removing agent is more than 10 mg/Kg.

When the input amount of the chromium removing agent is 0.5 percent, two groups of equal-amount cement samples are adopted and input into a grinding machine;

one group of the two groups of control samples is added with 0.5 percent of chromium removing agent in the grinding aid, and the other group is added with the grinding aid without the chromium removing agent; putting the two groups of samples into a grinding machine to perform grinding operation in the same time;

after grinding is finished, taking out samples to respectively detect the chromium content, wherein the chromium content in the sample group mixed with the chromium removing agent is 2.16mg/Kg, and the chromium content in the grinding aid control group without the chromium removing agent is more than 10 mg/Kg.

The result of the comparison test is combined, the conclusion is drawn that the chromium removing agent capable of removing hexavalent chromium is added into the grinding aid, hexavalent chromium elements in the grinding material can be taken out in the grinding material adding process, the grinding aid can be further guaranteed to lift the grinding material flow, the production speed of the grinding material can be increased, the national standard of cement grinding material compounding can be made, and the grinding aid can be put into use.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.