CN112661428A - Raw cement additive and application thereof - Google Patents
Raw cement additive and application thereof Download PDFInfo
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- CN112661428A CN112661428A CN202011556250.5A CN202011556250A CN112661428A CN 112661428 A CN112661428 A CN 112661428A CN 202011556250 A CN202011556250 A CN 202011556250A CN 112661428 A CN112661428 A CN 112661428A
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Abstract
The invention aims to provide a raw cement additive, which comprises the following substances in parts by weight: 8-15 parts of diethanol monoisopropanolamine, 15-25 parts of sodium tripolyphosphate, 3-7 parts of molasses, 8-15 parts of propylene glycol, 1-6 parts of nitrophenol, 10-15 parts of calcium chloride, 1-3 parts of potassium nitrate, 1-5 parts of sodium nitrate, 2-8 parts of sodium silicate, 1-6 parts of sodium carbonate, 2-5 parts of sodium bicarbonate and 8-15 parts of modified sodium humate, the gaps among the raw material particles of the additive are reduced, the material layer is more stable, the grinding roller rolls more fully, the grinding efficiency of the raw material is effectively improved, the power consumption of grinding is saved, in the combustion process, the activation energy of carbon oxidation reaction is reduced, the cracking of macromolecular organic matters is accelerated, the oxygen consumption is reduced through the interaction of mutual permeation, catalysis, oxidation and the like among the components, so that the macromolecular organic matters are stably and fully combusted, and the effect of saving coal is achieved.
Description
Technical Field
The invention relates to the field of cement additives, in particular to a raw material cement additive and application thereof.
Background
Since 2011 in China, the cement yield per year is more than 20 hundred million tons, and by 2018, 1681 cement production lines are accumulated by novel dry-process cement production lines in China, and the designed capacity of clinker is more than 18 hundred million tons. While the cement industry develops, the consumption of resources such as limestone, clay, coal and the like, energy sources and environmental influences are also surprising. With the improvement of the environmental protection consciousness of people, more advanced technology is urgently needed, the consumption of energy and resources in the clinker preparation process is reduced, the emission of harmful gas is reduced, and the sustainable development of the cement industry is realized. The production of raw materials is a basic link in the production process of cement, and the addition of a multifunctional additive which can influence the subsequent working procedures in the grinding process of the raw materials can directly influence the energy consumption and the quality of clinker and the generation and the emission of pollutants.
The inventor finds that how to reduce energy consumption in the raw material calcining process is a difficult problem in the industry when studying raw material additives, and the inventor tries to mix grinding agents and combustion improvers to reduce the energy consumption, but the effect is poor.
Disclosure of Invention
The object of the present invention is to provide a raw cement additive which solves at least one of the above-mentioned problems.
In a first aspect, the invention provides a raw cement additive, which comprises the following substances in parts by weight: 8-15 parts of diethanol monoisopropanolamine, 15-25 parts of sodium tripolyphosphate, 3-7 parts of molasses, 8-15 parts of propylene glycol, 1-6 parts of nitrophenol, 10-15 parts of calcium chloride, 1-3 parts of potassium nitrate, 1-5 parts of sodium nitrate, 2-8 parts of sodium silicate, 1-6 parts of sodium carbonate, 2-5 parts of sodium bicarbonate and 8-15 parts of modified sodium humate.
Preferably, the additive comprises the following substances in parts by weight: 10-13 parts of diethanol monoisopropanolamine, 18-20 parts of sodium tripolyphosphate, 4-6 parts of molasses, 10-13 parts of propylene glycol, 3-5 parts of nitrophenol, 12-14 parts of calcium chloride, 1-3 parts of potassium nitrate, 1-4 parts of sodium nitrate, 2-5 parts of sodium silicate, 1-3 parts of sodium carbonate, 2-3 parts of sodium bicarbonate and 8-10 parts of modified sodium humate.
Preferably, the additive comprises the following substances in parts by weight: 12 parts of diethanol monoisopropanolamine, 19 parts of sodium tripolyphosphate, 5 parts of molasses, 12 parts of propylene glycol, 4 parts of nitrophenol, 14 parts of calcium chloride, 1 part of potassium nitrate, 2 parts of sodium nitrate, 3 parts of sodium silicate, 2 parts of sodium carbonate, 2 parts of sodium bicarbonate and 9 parts of modified sodium humate.
Preferably, the additive further comprises the following substances in parts by weight: 8 parts of amino trimethylene phosphonic acid.
Preferably, the additive further comprises the following substances in parts by weight: 10 parts of diethylenetriamine pentamethylene phosphonic acid.
Preferably, the preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
Preferably, the preparation method of the sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
In a second aspect, the present invention provides a cement raw material additive application, in which the cement raw material additive according to any one of claims 1 to 7 and the cement raw material additive are ground together and then calcined to obtain cement clinker.
Diethanolisopropanolamine: diethanol monoisopropanolamine, also known as 1- [ N, N-bis (2-hydroxyethyl) amino ] propan-2-ol, DEIPA for short, is an organic compound consisting of C, H, O, N, is a colorless or light yellow transparent viscous liquid with ammonia odor stimulation, and has stable properties at normal temperature and normal pressure. The diethanol monoisopropanolamine is a green and environment-friendly novel grinding aid raw material, has an obvious grinding aid effect, and is mostly applied to cement grinding aids.
Sodium tripolyphosphate: sodium tripolyphosphate is an inorganic substance, and has chemical formula Na5P3O10Is an amorphous water-soluble linear polyphosphate with Na at both ends2PO4The molecular weight 367.86 is commonly used in food as water retention agent, quality modifier, pH regulator, and metal chelating agent.
Nitrophenol: useful as indicators, synthetic dyes, and intermediates for other substances. The various isomers are readily absorbed by the skin and lungs and are often excreted in the urine as chelates (nitrophenol glucuronides). Acute toxicity: mice were orally administered LD501297mg/kg (orthotopic), 1414mg/kg (internodal), 467mg/kg (antipodal). Rats were orally administered LD502828mg/kg (neighbor), 933mg/kg (spacer), 616mg/kg (counter).
Has the advantages that:
the invention has the advantages that the gaps among the raw material particles are reduced, the material layer is more stable, the grinding of the grinding roller is more sufficient, the grinding efficiency of the raw material is effectively improved, the grinding power consumption is saved, and the activation energy of carbon oxidation reaction is reduced, the cracking of macromolecular organic matters is accelerated, the oxygen consumption is reduced, and the stable and sufficient combustion is realized through the interaction of mutual permeation, catalysis, oxidation and the like among the components in the combustion process, so that the effect of saving coal is achieved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, but not all 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.
Example 1
The raw material cement additive comprises the following substances in parts by weight: 8-15 parts of diethanol monoisopropanolamine, 25 parts of sodium tripolyphosphate, 7 parts of molasses, 15 parts of propylene glycol, 6 parts of nitrophenol, 15 parts of calcium chloride, 3 parts of potassium nitrate, 5 parts of sodium nitrate, 8 parts of sodium silicate, 6 parts of sodium carbonate, 5 parts of sodium bicarbonate, 15 parts of modified sodium humate and 80 parts of water.
The preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
The preparation method of the sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
Example 2
The raw material cement additive comprises the following substances in parts by weight: 8-15 parts of diethanol monoisopropanolamine, 15 parts of sodium tripolyphosphate, 3 parts of molasses, 8 parts of propylene glycol, 1 part of nitrophenol, 10 parts of calcium chloride, 1 part of potassium nitrate, 1 part of sodium nitrate, 2 parts of sodium silicate, 1 part of sodium carbonate, 2 parts of sodium bicarbonate, 8 parts of modified sodium humate and 50 parts of water.
The preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
The preparation method of the sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
Example 3
The raw material cement additive comprises the following substances in parts by weight: 10 parts of diethanol monoisopropanolamine, 18 parts of sodium tripolyphosphate, 4 parts of molasses, 10 parts of propylene glycol, 3 parts of nitrophenol, 12 parts of calcium chloride, 1 part of potassium nitrate, 1 part of sodium nitrate, 2 parts of sodium silicate, 1 part of sodium carbonate, 2 parts of sodium bicarbonate, 8 parts of modified sodium humate and 50 parts of water.
The preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
The preparation method of the sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
Example 4
The raw material cement additive comprises the following substances in parts by weight: 13 parts of diethanol monoisopropanolamine, 20 parts of sodium tripolyphosphate, 6 parts of molasses, 13 parts of propylene glycol, 5 parts of nitrophenol, 14 parts of calcium chloride, 3 parts of potassium nitrate, 4 parts of sodium nitrate, 5 parts of sodium silicate, 3 parts of sodium carbonate, 3 parts of sodium bicarbonate, 10 parts of modified sodium humate, 8 parts of amino trimethylene phosphonic acid and 50 parts of water.
The preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
The preparation method of the sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
Example 5
The raw material cement additive comprises the following substances in parts by weight: 12 parts of diethanol monoisopropanolamine, 19 parts of sodium tripolyphosphate, 5 parts of molasses, 12 parts of propylene glycol, 4 parts of nitrophenol, 14 parts of calcium chloride, 1 part of potassium nitrate, 2 parts of sodium nitrate, 3 parts of sodium silicate, 2 parts of sodium carbonate, 2 parts of sodium bicarbonate, 9 parts of modified sodium humate, 8 parts of amino trimethylene phosphonic acid, 10 parts of diethylenetriamine pentamethylene phosphonic acid and 50 parts of water.
The preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
The preparation method of the sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
Comparative example 1:
comparative example 1 differs from example 5 only in that no diethanolisopropanolamine is added and the other preparation methods and preparation conditions are identical to those of example 5.
Comparative example 2:
comparative example 2 differs from example 5 only in that sodium tripolyphosphate was not added and the other preparation methods and preparation conditions were the same as in example 5.
Comparative example 3:
comparative example 2 differs from example 5 only in that modified sodium humate was not added and the other preparation methods and preparation conditions were identical to those of example 5.
Comparative example 4
Comparative example 4 is a commercial raw meal additive.
The raw meal additives prepared in the above examples 1 to 5 and comparative examples 1 to 4 were added to cement raw meal in an amount of 0.8% of the weight of the raw meal per ton of cement raw meal, the raw meal was ground using a vertical mill and then calcined in a cement dry kiln at 5000t/d to obtain corresponding clinker, and the batch size of the raw meal without the additives of the present invention was used as a blank comparative example, and the results of the raw meal hourly output and the properties of the prepared clinker are shown in table 1.
As can be seen from table 1, after the raw meal additives obtained in examples 1 to 5 of the present invention are used for preparing clinker, the raw meal yield is greatly improved, the coal consumption is significantly reduced, and the mechanical strength is also significantly improved, while as can be seen from the comparison between example 5 and comparative examples 1 to 3, diethanol monoisopropanolamine, sodium tripolyphosphate, and modified sodium humate all play an important role in the scheme of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The raw material cement additive is characterized by comprising the following substances in parts by weight: 8-15 parts of diethanol monoisopropanolamine, 15-25 parts of sodium tripolyphosphate, 3-7 parts of molasses, 8-15 parts of propylene glycol, 1-6 parts of nitrophenol, 10-15 parts of calcium chloride, 1-3 parts of potassium nitrate, 1-5 parts of sodium nitrate, 2-8 parts of sodium silicate, 1-6 parts of sodium carbonate, 2-5 parts of sodium bicarbonate and 8-15 parts of modified sodium humate.
2. The additive according to claim 1, comprising the following substances in parts by mass: 10-13 parts of diethanol monoisopropanolamine, 18-20 parts of sodium tripolyphosphate, 4-6 parts of molasses, 10-13 parts of propylene glycol, 3-5 parts of nitrophenol, 12-14 parts of calcium chloride, 1-3 parts of potassium nitrate, 1-4 parts of sodium nitrate, 2-5 parts of sodium silicate, 1-3 parts of sodium carbonate, 2-3 parts of sodium bicarbonate and 8-10 parts of modified sodium humate.
3. The additive according to claim 1, comprising the following substances in parts by mass: 12 parts of diethanol monoisopropanolamine, 19 parts of sodium tripolyphosphate, 5 parts of molasses, 12 parts of propylene glycol, 4 parts of nitrophenol, 14 parts of calcium chloride, 1 part of potassium nitrate, 2 parts of sodium nitrate, 3 parts of sodium silicate, 2 parts of sodium carbonate, 2 parts of sodium bicarbonate and 9 parts of modified sodium humate.
4. The additive according to claim 1, further comprising the following substances in parts by mass: 8 parts of amino trimethylene phosphonic acid.
5. The additive according to claim 1, further comprising the following substances in parts by mass: 10 parts of diethylenetriamine pentamethylene phosphonic acid.
6. The additive as claimed in claim 1, wherein the preparation method of the modified sodium humate comprises the following steps:
(1) mixing humic acid mineral powder, sodium hydroxide and sodium thiosulfate in distilled water, stirring at 100 ℃ and 120 rpm, reacting at 100 ℃ for 80 minutes, centrifuging for 10 minutes at the rotating speed of 3500 rpm, and taking supernatant;
(2) and putting the supernatant into a stainless steel tray, and drying in an oven at the temperature of 80-180 ℃ to constant weight to obtain the modified sodium humate.
7. Additive according to claim 1, wherein the preparation method of sodium tripolyphosphate comprises the following steps: 1) adding dry phosphate powder into alkali liquor, and stirring and mixing through a stirrer to obtain a mixture; 2) spraying the mixture obtained in the step 1) into a polymerization furnace for dehydration and polycondensation to obtain the sodium tripolyphosphate.
8. Use of the cement raw material additive as defined in any one of claims 1 to 7 in cement, characterized in that the cement raw material to be ground and the cement raw material additive are ground together and then calcined to produce cement clinker.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480231A (en) * | 2021-08-24 | 2021-10-08 | 山东众森科技股份有限公司 | Energy-saving cement raw material grinding aid and preparation method thereof |
| CN116159660A (en) * | 2022-12-31 | 2023-05-26 | 龙祥雨(深圳)科技有限公司 | Preparation method of liquid raw material grinding aid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108569A (en) * | 1985-11-23 | 1987-05-27 | 中国科学院化学研究所 | Fabrication of cement slushing agent of humic acid type by semi-dried method |
| CN108947312A (en) * | 2018-08-01 | 2018-12-07 | 浙江桐乡市众森水泥助磨剂科技有限公司 | A kind of early-strength function grinding aid |
| CN110981238A (en) * | 2019-12-21 | 2020-04-10 | 安徽海螺新材料科技有限公司 | Additive for cement raw material |
| CN111187015A (en) * | 2020-03-24 | 2020-05-22 | 安徽海螺新材料科技有限公司 | Cement raw material decomposition accelerator |
-
2020
- 2020-12-24 CN CN202011556250.5A patent/CN112661428A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108569A (en) * | 1985-11-23 | 1987-05-27 | 中国科学院化学研究所 | Fabrication of cement slushing agent of humic acid type by semi-dried method |
| CN108947312A (en) * | 2018-08-01 | 2018-12-07 | 浙江桐乡市众森水泥助磨剂科技有限公司 | A kind of early-strength function grinding aid |
| CN110981238A (en) * | 2019-12-21 | 2020-04-10 | 安徽海螺新材料科技有限公司 | Additive for cement raw material |
| CN111187015A (en) * | 2020-03-24 | 2020-05-22 | 安徽海螺新材料科技有限公司 | Cement raw material decomposition accelerator |
Non-Patent Citations (5)
| Title |
|---|
| 李子末: "水泥助磨剂技术研究基础", 《百度文库》 * |
| 李子末: "水泥助磨剂技术研究基础", 《百度文库》, 16 December 2013 (2013-12-16), pages 1 * |
| 杨旭华等: "腐植酸钠在提高球磨效率中的机理研究", 《腐植酸》 * |
| 杨旭华等: "腐植酸钠在提高球磨效率中的机理研究", 《腐植酸》, no. 6, 31 December 2006 (2006-12-31), pages 28 - 30 * |
| 阮承祥等: "《混凝土外加剂及其工程应用》", vol. 1, 31 December 2008, 江西科学技术出版社, pages: 93 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480231A (en) * | 2021-08-24 | 2021-10-08 | 山东众森科技股份有限公司 | Energy-saving cement raw material grinding aid and preparation method thereof |
| CN116159660A (en) * | 2022-12-31 | 2023-05-26 | 龙祥雨(深圳)科技有限公司 | Preparation method of liquid raw material grinding aid |
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