CN113480231A - Energy-saving cement raw material grinding aid and preparation method thereof - Google Patents
Energy-saving cement raw material grinding aid and preparation method thereof Download PDFInfo
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- CN113480231A CN113480231A CN202110975713.XA CN202110975713A CN113480231A CN 113480231 A CN113480231 A CN 113480231A CN 202110975713 A CN202110975713 A CN 202110975713A CN 113480231 A CN113480231 A CN 113480231A
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- cement raw
- grinding aid
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
Abstract
The invention discloses an energy-saving cement raw material grinding aid and a preparation method thereof, the cement raw material grinding aid comprises an organic grinding aid component, an inorganic mineralization component and an inorganic combustion-supporting component, 0.5 percent of the grinding aid is added into cement raw materials, the hourly output of a cement raw material grinding machine can be improved by more than 15 tons, the clinker ton standard coal consumption is reduced by more than 3kg, and the clinker strength is improved by more than 3 days and 28 days and 1 MPa.
Description
Technical Field
The invention relates to an energy-saving cement raw material grinding aid and a preparation method thereof, belonging to the field of cement production.
Background
In recent years, the annual cement production in our country is more than 20 hundred million tons, wherein the annual production of clinker for cement production reaches more than 16 hundred million tons. In the production process of the clinker, cement raw materials need to be ground, and then the ground raw materials are calcined at 1450 ℃, so that the clinker required by cement production is finally obtained. The raw material grinding is a process of changing bulk materials into fine powder by overcoming the stress of object deformation and the cohesive force between mass points through impact, extrusion, grinding and the like under the action of external force. In the cement production process, the effective energy utilization rate of the mill is low for a long time, and the power consumption is high. People take many measures, such as improving the structure of a mill, reforming the grinding process flow, adding powder selecting equipment, improving the ventilation in the mill and the like. However, these methods are limited by the conditions of investment, factory building, management level, etc., and the obtained effect is not ideal.
Meanwhile, during the development of the cement industry, the consumption of resources such as limestone, clay, coal and the like and energy sources and the brought environmental impact reach a remarkable step. With the increase of the national ecological environment treatment and protection and the improvement of the awareness of people on environment protection, more advanced technology is urgently needed, the consumption of energy and resources in the clinker preparation process 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 clinker, and the energy-saving cement raw material admixture which can influence the subsequent working procedure is added in the grinding process of the cement raw materials, so that the energy consumption and the quality of clinker sintering from burning materials can be directly influenced. The energy-saving cement raw material grinding aid reduces the power consumption and coal consumption in the clinker preparation process and increases the clinker strength, so that the clinker consumption can be saved in the cement preparation process, solid wastes generated by other industries can be absorbed more, and the energy-saving cement raw material grinding aid is an effective measure for realizing energy conservation, emission reduction and sustainable development of the cement industry.
The phosphorus slag, the lead-zinc slag, the copper slag, the desulfurized gypsum and other bulk industrial solid wastes can not be fully utilized for a long time, and the mass storage of the phosphorus slag, the lead-zinc slag, the copper slag, the desulfurized gypsum and other bulk industrial solid wastes not only wastes a large amount of land resources, but also causes serious pollution to the environment and underground water sources. If the energy-saving cement raw material grinding aid can be produced by utilizing the massive industrial solid wastes such as phosphorus slag, lead-zinc slag, copper slag, desulfurized gypsum and the like, the pollution to the environment and underground water sources caused by storage can be solved, the reclamation of the industrial solid wastes can be realized, and the purposes of changing waste into valuable and benefiting the nation and the people are really achieved.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides an energy-saving cement raw material grinding aid and a preparation method thereof, the cement raw material grinding aid comprises an organic grinding aid component, an inorganic mineralization component and an inorganic combustion-supporting component, 0.5 percent of the grinding aid is added into cement raw materials, the hourly output of a cement raw material grinding machine can be improved by more than 15 tons, the clinker ton standard coal consumption is reduced by more than 3kg, and the clinker strength is improved by more than 3 days and 28 days and 1 MPa.
An energy-saving cement raw material grinding aid comprises the following components in parts by weight:
5-15 parts of organic grinding-aid components, 35-55 parts of inorganic mineralization components and 30-60 parts of inorganic combustion-supporting components.
Further, the organic grinding aid component is one of byproduct glycerol and xylitol waste liquid.
Further, the inorganic mineralized components are two or more of desulfurized gypsum, lithium slag, copper slag, lead-zinc tailings and phosphorus slag.
Further, the inorganic combustion-supporting component is one or more of ferrocene, potassium nitrate, potassium chlorate and barium nitrate.
Further, the preparation method of the cement raw material grinding aid comprises the following steps:
1) according to the mass ratio of (0.8-1): (1-3): (1-2) mixing desulfurized gypsum, phosphorous slag and copper slag according to the proportion to obtain inorganic mineralized components;
2) according to the mass ratio of (0.8-1): (1.5-2) proportionally mixing ferrocene and potassium nitrate to obtain an inorganic combustion-supporting component;
3) mixing the inorganic mineralization component, the inorganic combustion-supporting component and the organic grinding-aid component according to the proportion of (6-8) to (7-9) to (1-3), granulating and drying to obtain the cement raw material grinding aid.
Further, the particle size in the granulation in the above step 3) is controlled within 10 mm.
Further, the drying temperature in the step 3) is 40-100 ℃, and the final water content of the grinding aid for the cement raw meal is controlled within 1%.
The byproduct glycerol and the xylitol waste liquid are used as grinding-aid components, wherein the reproduced glycerol is from the waste liquid produced by producing epoxy chloropropane, the xylitol alcohol waste liquid is from the waste liquid produced by producing xylitol, contains a large amount of sodium lignosulfonate and a small amount of fusel, and mainly plays a role in reducing the surface energy of the material, accelerating the physical crushing speed, eliminating static electricity generated in the physical grinding process, preventing fine cracks from closing after physical crushing, reducing the excessive grinding of the material and further improving the hourly production of a raw material grinding machineThe quantity and the power consumption of grinding are reduced; the byproduct desulfurized gypsum, the byproduct lithium slag, the byproduct copper slag and the lead-zinc tailings are main mineralized components and are calcined in the common silicate clinker C2S or C3In the process of forming the S phase, the S phase can enter the structures of the silicate phases to form solid solutions, and the thermodynamic stability of the clinker minerals is obviously improved, so that the effects of improving the burnability of cement raw materials and the quality of clinker are achieved; ferrocene, potassium nitrate, potassium chlorate, barium nitrate are as combustion-supporting composition, coal forms the mist after gasifying with each chemical component simultaneously in the combustion process, under catalysis, under the modification, turn into new combustible energy with the flue gas that should discharge, impel flame inner flame temperature to gather to increase simultaneously, and drive the gathering of flame outer flame temperature, very big increase flame length, flame density, flame area, and can form the microexplosion phenomenon in the kiln, further increase the dispersibility of material, improve the efficiency that raw meal decomposes, the grog is burnt, thereby improved cement kiln output, save grog coal consumption, and can prevent the grog from agglomerating and promote the later stage. The following points should be noted with this product: 1. the mixing amount of the grinding aid in the energy-saving cement raw material is calculated according to the total amount of the cement raw material; 2. the mixing mode is an internal mixing method, namely the cement raw material and the raw material are mixed into a mill during the grinding process of the cement raw material; 3. the product should be preserved in shady and ventilated place to prevent moisture and rain.
Has the advantages that:
the output per hour of the cement raw material grinding mill can be improved and the power consumption is reduced through the coordination promotion effect among the components; the easy burning property of the cement raw material is improved, the coal consumption of clinker calcination is reduced, and the quality of the calcined clinker is improved; the problems of poor material fluidity and inconvenient use are solved through the measures of granulation, drying and the like; provides a new utilization approach for the byproduct of chemical waste liquid such as glycerol and xylitol waste liquid, and mineral waste residue such as lithium slag and copper slag. The product has simple production process and long storage period of one year.
Detailed Description
In order to make the technical solutions in the present application better understood, the present invention is further described below with reference to examples, which are only a part of examples of the present application, but not all examples, and the present invention is not limited by the following examples.
Grinding aid for producing cement raw material
Firstly, pouring 400 kg of a mixture of desulfurized gypsum, phosphorus slag and copper slag into a stirrer, wherein the ratio of desulfurized gypsum to phosphorus slag to copper slag is 1:2:2, then adding 450 kg of a mixture of ferrocene and potassium nitrate, wherein the ratio of ferrocene to potassium nitrate is 1:4, starting stirring for five minutes, and stopping stirring; and simultaneously pouring 150 kg of weighed byproduct glycerol into a stirrer to continue stirring for ten minutes, pouring the mixture into granulation equipment to carry out granulation treatment, and drying the treated mixture at 50 ℃ to ensure that the water content of the mixture is less than 1% to obtain the cement raw material grinding aid.
Comparative test using the raw grinding aid
The doping weight percentage of the cement raw material grinding aid obtained in the cement raw material grinding is 0.5%. The energy-saving cement raw material grinding aid prepared by the above example is mixed into cement raw material powder grinding according to 0.5 percent of cement raw material per ton, the cement raw material is ground by a vertical mill and then is put into a cement dry kiln with daily output of 5000t/d to be calcined to obtain corresponding clinker, and the clinker prepared by the raw material without the energy-saving cement raw material grinding aid is used as a comparison reference. The proportions of the cement raw materials and the components of the limestone used are shown in Table 1, and the bench-hour yield of the raw materials and the performance results of the prepared clinker are shown in Table 2. The detection standard of easy burning is GB/T26566-2011, and the detection standard of fineness is GB/T1345-2005.
TABLE 1 Cement raw mix proportion and limestone composition used
TABLE 2 comparison of Performance Listing
As shown in tables 1 and 2, after the energy-saving cement raw material grinding aid is used, the hourly output of a cement raw material grinding machine is increased by 16 tons per hour, the oversize of the raw material with the fineness of 80 microns is reduced by 1.2 percent, compared with the unadditized raw material grinding aid, the free calcium oxide (f-CaO) is reduced by 0.18 percent, the standard coal consumption of clinker is reduced by 3.9 kilograms per ton, the 3-day compressive strength of the clinker is improved by 1.1MPa, and the 28-day compressive strength of the clinker is improved by 1.5 MPa.
Example 2
Firstly pouring 450 kg of a mixture of desulfurized gypsum, phosphorus slag and copper slag into a stirrer, wherein the ratio of desulfurized gypsum to phosphorus slag to copper slag is 1:1:3, then adding 400 kg of a mixture of ferrocene and potassium nitrate, wherein the ratio of ferrocene to potassium nitrate is 2:3, starting stirring for five minutes, and stopping stirring; and simultaneously pouring 150 kg of weighed byproduct glycerol into a stirrer to continue stirring for ten minutes, pouring the mixture into granulation equipment to carry out granulation treatment, and drying the treated mixture at 50 ℃ to ensure that the water content of the mixture is less than 1%.
Example 3
Firstly pouring 450 kg of a mixture of desulfurized gypsum, phosphorus slag and copper slag into a stirrer, wherein the ratio of desulfurized gypsum to phosphorus slag to copper slag is 1:3:1, then adding 400 kg of a mixture of ferrocene and barium nitrate, wherein the ratio of ferrocene to barium nitrate is 1:4, starting stirring for five minutes, and stopping stirring; and simultaneously pouring 150 kg of the weighed xylitol waste liquid into a stirrer to continue stirring for ten minutes, pouring the mixture into granulation equipment to carry out granulation treatment, and drying the treated mixture at 60 ℃ to ensure that the water content of the mixture is less than 1%.
Example 4
Firstly, pouring 400 kg of a mixture of desulfurized gypsum, phosphorus slag and lead-zinc tailings into a stirrer, wherein the ratio of desulfurized gypsum to phosphorus slag to lead-zinc tailings is 1:2:2, then adding 450 kg of a mixture of ferrocene and potassium chlorate, wherein the ratio of ferrocene to potassium chlorate is 1:4, starting stirring for five minutes, and stopping stirring; and simultaneously pouring 150 kg of weighed byproduct glycerol into a stirrer to continue stirring for ten minutes, pouring the mixture into granulation equipment to carry out granulation treatment, and drying the treated mixture at 55 ℃ to ensure that the water content of the mixture is less than 1%.
Claims (7)
1. An energy-saving cement raw material grinding aid is characterized by comprising the following components in parts by weight:
5-15 parts of organic grinding-aid components, 35-55 parts of inorganic mineralization components and 30-60 parts of inorganic combustion-supporting components.
2. The grinding aid for cement raw meal as claimed in claim 1, wherein the organic grinding aid component is one of glycerol and xylitol waste liquid as a byproduct.
3. The grinding aid for cement raw meal as claimed in claim 1, wherein the inorganic mineralizing component is two or more of desulfurized gypsum, lithium slag, copper slag, lead-zinc tailings and phosphorus slag.
4. The grinding aid for cement raw meal as claimed in claim 1, wherein the inorganic combustion-supporting component is one or more of ferrocene, potassium nitrate, potassium chlorate and barium nitrate.
5. The grinding aid for cement raw material as claimed in claim 1, wherein the preparation method of the grinding aid for cement raw material comprises the following steps:
1) according to the mass ratio of (0.8-1): (1-3): (1-2) mixing desulfurized gypsum, phosphorous slag and copper slag according to the proportion to obtain inorganic mineralized components;
2) according to the mass ratio of (0.8-1): (1.5-2) proportionally mixing ferrocene and potassium nitrate to obtain an inorganic combustion-supporting component;
3) mixing the inorganic mineralization component, the inorganic combustion-supporting component and the organic grinding-aid component according to the proportion of (6-8) to (7-9) to (1-3), granulating and drying to obtain the cement raw material grinding aid.
6. The grinding aid for cement raw material as claimed in claim 1, wherein the particle size in the granulation in step 3) is controlled within 10 mm.
7. The grinding aid for cement raw meal as claimed in claim 1, wherein the drying temperature in step 3) is 40-100 ℃, and the final water content of the grinding aid for cement raw meal is controlled within 1%.
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| CN202110975713.XA CN113480231A (en) | 2021-08-24 | 2021-08-24 | Energy-saving cement raw material grinding aid and preparation method thereof |
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| CN202110975713.XA CN113480231A (en) | 2021-08-24 | 2021-08-24 | Energy-saving cement raw material grinding aid and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611549A (en) * | 2022-11-08 | 2023-01-17 | 山东众森新材料有限公司 | Cement raw material grinding aid and preparation method thereof |
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| CN1837122A (en) * | 2005-03-25 | 2006-09-27 | 尹小林 | Raw materials combustion adjuvant |
| US20160214891A1 (en) * | 2013-09-03 | 2016-07-28 | Heidelbergcement Ag | Fluxes/mineralizers for calcium sulfoaluminate cements |
| CN105837078A (en) * | 2016-04-18 | 2016-08-10 | 南京工业大学 | Compound type cement grinding aid as well as preparation method and application thereof |
| 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 |
| CN112661428A (en) * | 2020-12-24 | 2021-04-16 | 江西富创新材料有限公司 | Raw cement additive and application thereof |
| CN112759289A (en) * | 2020-12-31 | 2021-05-07 | 安徽海螺新材料科技有限公司 | Cement raw material additive with grinding-aid and decomposition-promoting effects |
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2021
- 2021-08-24 CN CN202110975713.XA patent/CN113480231A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1837122A (en) * | 2005-03-25 | 2006-09-27 | 尹小林 | Raw materials combustion adjuvant |
| US20160214891A1 (en) * | 2013-09-03 | 2016-07-28 | Heidelbergcement Ag | Fluxes/mineralizers for calcium sulfoaluminate cements |
| CN105837078A (en) * | 2016-04-18 | 2016-08-10 | 南京工业大学 | Compound type cement grinding aid as well as preparation method and application thereof |
| 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 |
| CN112661428A (en) * | 2020-12-24 | 2021-04-16 | 江西富创新材料有限公司 | Raw cement additive and application thereof |
| CN112759289A (en) * | 2020-12-31 | 2021-05-07 | 安徽海螺新材料科技有限公司 | Cement raw material additive with grinding-aid and decomposition-promoting effects |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115611549A (en) * | 2022-11-08 | 2023-01-17 | 山东众森新材料有限公司 | Cement raw material grinding aid and preparation method thereof |
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