CN111187012A - Process for producing cement by using lithium slag as cement admixture instead of partial water slag - Google Patents
Process for producing cement by using lithium slag as cement admixture instead of partial water slag Download PDFInfo
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- CN111187012A CN111187012A CN202010092605.3A CN202010092605A CN111187012A CN 111187012 A CN111187012 A CN 111187012A CN 202010092605 A CN202010092605 A CN 202010092605A CN 111187012 A CN111187012 A CN 111187012A
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- slag
- cement
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of industrial waste residue utilization and cement building materials, and discloses a process for producing cement by using lithium slag as a cement admixture instead of partial water slag, which comprises the following operation steps: crushing and conveying coal gangue and limestone, piling and conveying desulfurized gypsum, grain slag and lithium slag, batching, grinding cement and the like. According to the invention, the water content in the lithium slag is strictly controlled, and normal discharging is kept, so that the production line system is stably operated after replacement, the performance of the produced cement meets the relevant standard, the quality is stable, the cost is saved, meanwhile, the industrial waste slag of a lithium power plant can be digested, the environmental protection pressure is reduced, good economic and social benefits are brought after digestion, and the sustainable development of industry and resource environment is facilitated.
Description
Technical Field
The invention relates to the technical field of industrial waste residue utilization and cement building materials, in particular to a process for producing cement by using lithium slag as a cement mixing material instead of partial water slag.
Background
The granulated slag refers to slag of an iron-making blast furnace. It is melted at high temperature and cooled rapidly with water to form a granulated foam which is milky white, light, crisp, porous and easily ground into fine powder. The cement is an important mixed material for the later-stage grinding process of cement, and in recent years, due to the fact that the grain slag resources are short in market supply and high in price, certain influence is brought to the cement production industry, and the cost of cement products is increased. Under the drive of the above-mentioned industry background, the applicant actively searches for a cement admixture replacing grain slag, and through research, the applicant finds a process for producing cement by using lithium slag to replace partial water slag as the cement admixture, the produced cement has the performance meeting the standard and stable performance, the production cost is reduced, and meanwhile, the waste lithium slag is treated for the society, and the economic and social benefits are good.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a process for producing cement by using lithium slag as a cement mixing material instead of partial water slag.
(II) technical scheme
In order to solve the above problems, the present invention provides the following technical solutions: a process for producing cement by using lithium slag as a cement admixture instead of partial water slag comprises the following operation steps:
s1, crushing and conveying coal gangue and limestone:
the coal gangue and limestone stored in the piling shed are poured into respective receiving hoppers by a loader, are discharged by the receiving hoppers and are conveyed to a crusher by a plate type feeding machine for crushing, and the crushed materials are respectively conveyed to a coal gangue batching warehouse and a limestone batching warehouse of a cement batching plant by a rubber belt conveyor;
s2, conveying desulfurized gypsum, water granulated slag and lithium slag:
pouring the desulfurized gypsum, the grain slag and the lithium slag stored in the shed into respective corresponding steel hoppers by a loader, and respectively conveying the desulfurized gypsum, the grain slag and the lithium slag to a desulfurized gypsum batching storehouse and a slag batching storehouse of a cement batching station by a rod valve and a belt conveyor, wherein a slag mixture of the grain slag and the lithium slag mixed according to a certain weight ratio is stored in the slag batching storehouse;
s3, batching:
the cement batching plant is provided with five batching storehouses which are respectively used for storing clinker, coal gangue, limestone, desulfurized gypsum and slag, a set of batching scale is respectively arranged below each batching storehouse, the five materials are matched according to a preset proportion according to the variety of produced cement and are respectively sent to a cement grinding system by a rubber belt conveyor, wherein the slag is water slag and lithium slag;
s4, cement grinding:
the cement grinding adopts a semi-final grinding system consisting of a roller press, a powder selecting machine, a ball mill and a semi-final grinding multi-stage powder selecting machine to carry out powder treatment.
Preferably, in S2, the water content of the granulated slag is controlled below 13% and the fineness diameter is 15-66mm when the granulated slag does not enter the hopper.
Preferably, the lithium slag is industrial slag generated by roasting lithium concentrate at the high temperature of 1200-1300 ℃, acidizing and roasting, normal-pressure water leaching, liquid-solid separation and the like.
Preferably, the weight portions of: the lithium slag comprises the following components: 3-8.51 parts of SiO2: 35-65 parts of Al2O3: 18.3-23.6 parts of Fe2O3: 1-3 parts of CaO: 1.1-2.36 parts of MgO: 1.1-9.7 parts of SO3: 0.1-18.9 parts and H2O: 16-24 parts.
Preferably, the weight portions of: the clinker component is SiO2: 22.02-30.2 parts of Al2O3: 4-6 parts of Fe2O3: 2-4.5 parts of CaO: 60-70.9 parts of MgO: 1-2.3 parts of fCaO: 0.3 to 1.5 portions.
Preferably, the ratio of the lithium slag to the granulated slag in the slag batching library is 1:1, matching.
(III) advantageous effects
Compared with the prior art, the invention provides a process for producing cement by using lithium slag as a cement mixing material instead of partial water slag, which has the following beneficial effects:
the production line system runs stably after replacement, the performance of the produced cement meets relevant standards, the quality is stable, the cost is saved, meanwhile, the industrial waste residue of the lithium power plant can be digested, the environmental protection pressure is reduced, good economic and social benefits are brought after digestion, and the sustainable development of industry and resource environment is facilitated.
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.
Example 1
A process for producing cement by using lithium slag as a cement admixture instead of partial water slag comprises the following operation steps:
s1, crushing and conveying coal gangue and limestone:
the coal gangue and limestone stored in the piling shed are poured into respective receiving hoppers by a loader, are discharged by the receiving hoppers and are conveyed to a crusher by a plate type feeding machine for crushing, and the crushed materials are respectively conveyed to a coal gangue batching warehouse and a limestone batching warehouse of a cement batching plant by a rubber belt conveyor;
s2, conveying desulfurized gypsum, water granulated slag and lithium slag:
pouring the desulfurized gypsum, the grain slag and the lithium slag stored in the shed into respective corresponding steel hoppers by a loader, and respectively conveying the desulfurized gypsum, the grain slag and the lithium slag to a desulfurized gypsum batching storehouse and a slag batching storehouse of a cement batching station by a rod valve and a belt conveyor, wherein a slag mixture of the grain slag and the lithium slag mixed according to a weight ratio of 1:1 is stored in the slag batching storehouse;
s3, batching:
the cement batching plant is provided with five batching storehouses which are respectively used for storing clinker, coal gangue, limestone, desulfurized gypsum and slag, a set of batching scale is respectively arranged below each batching storehouse, the five materials are matched according to a preset proportion according to the variety of produced cement and are respectively sent to a cement grinding system by a rubber belt conveyor, wherein the slag is water slag and lithium slag;
s4, cement grinding:
the cement grinding adopts a semi-final grinding system consisting of a roller press, a powder selecting machine, a ball mill and a semi-final grinding multi-stage powder selecting machine to carry out powder treatment.
In an alternative embodiment, in S2, the water content of the granulated slag is controlled below 13% and the fineness is 16.77mm in diameter when the granulated slag does not enter the hopper.
In an optional embodiment, the lithium slag is industrial waste slag generated by roasting lithium concentrate at a high temperature of 1200 ℃, carrying out acidizing roasting, carrying out normal-pressure water leaching, carrying out liquid-solid separation and the like.
In an alternative embodiment, the following are calculated in parts by weight: the lithium slag comprises LOSS 7.51 parts and SiO263.4 parts of Al2O321.50 portions of Fe2O32.16 portions of CaO, 1.68 portions of CaO, 1.45 portions of MgO and SO30.32 parts of and H216.77 portions of O.
In an alternative embodiment, the following are calculated in parts by weight: the clinker component is SiO2:22.02、AL2O35.72 parts of Fe2O33.71 portions of CaO, 65.27 portions of MgO, 1.45 portions of fCaO and 0.95 portion of fCaO.
Example 2
S1, crushing and conveying coal gangue and limestone:
the coal gangue and limestone stored in the piling shed are poured into respective receiving hoppers by a loader, are discharged by the receiving hoppers and are conveyed to a crusher by a plate type feeding machine for crushing, and the crushed materials are respectively conveyed to a coal gangue batching warehouse and a limestone batching warehouse of a cement batching plant by a rubber belt conveyor;
s2, stacking and conveying desulfurized gypsum, water granulated slag and lithium slag:
pouring the desulfurized gypsum, the grain slag and the lithium slag stored in the shed into respective corresponding steel hoppers by a loader, and respectively conveying the desulfurized gypsum, the grain slag and the lithium slag to a desulfurized gypsum batching storehouse and a slag batching storehouse of a cement batching station by a rod valve and a belt conveyor, wherein a slag mixture of the grain slag and the lithium slag mixed according to a weight ratio of 1:1 is stored in the slag batching storehouse;
s3, batching:
the cement batching plant is provided with five batching storehouses which are respectively used for storing clinker, coal gangue, limestone, desulfurized gypsum and slag, a set of batching scale is respectively arranged below each batching storehouse, the five materials are matched according to a preset proportion according to the variety of produced cement and are respectively sent to a cement grinding system by a rubber belt conveyor, wherein the slag is water slag and lithium slag;
s4, cement grinding:
the cement grinding adopts a semi-final grinding system consisting of a roller press, a powder selecting machine, a ball mill and a semi-final grinding multi-stage powder selecting machine to carry out powder treatment.
In an alternative embodiment, in S2, the water content of the granulated slag is controlled below 13% and the fineness is 23mm in diameter when the granulated slag does not enter the hopper.
In an optional embodiment, the lithium slag is industrial waste slag produced by roasting lithium concentrate at a high temperature of 1223 ℃, carrying out acidizing roasting, carrying out normal-pressure water leaching, carrying out liquid-solid separation and the like.
In an alternative embodiment, the following are calculated in parts by weight: the lithium slag comprises LOSS 3.71 parts and SiO237.9 parts of Al2O319.61 parts of Fe2O31.24 portions, 1.241 portions of CaO, 9.20 portions of MgO and SO316.3 parts and H265.06 parts of O.
In an alternative embodiment, the following are calculated in parts by weight: the clinker component is SiO2:22.02、AL2O35.72 parts of Fe2O33.71 portions of CaO, 65.27 portions of MgO, 1.45 portions of fCaO and 0.95 portion of fCaO.
And (3) testing:
TABLE 1 physical and chemical compositions of lithium slag, parts by weight
As can be seen from Table 1, the chemical compositions of the two lithium slags are greatly different due to different raw materials, the physical properties are also different, and particularly the fineness and the radioactivity detection are qualified.
TABLE 2 Clinker chemical composition, mineral composition (parts by weight) and specific values
And (3) test results:
according to the selected raw materials, 30 parts of lithium slag and 28-day strength of clinker in example 1 and example 2 are compared. The results of the small abrasion test are shown in Table 3.
TABLE 3 Small grind test results
As can be seen from table 3, the data of the small abrasion test shows that: the 28-day strength ratio of the grain slag is 95.48 parts, the 28-day strength ratio of the lithium slag in example 1 is 90.43 parts, and the 28-day strength ratio of the lithium slag in example 2 is 85.74 parts. From the whole inspection data. It is unlikely that two types of lithium slag will completely replace the granulated slag. Although the strength of the lithium slag of example 1 was relatively high in 28 days, the strength was too low in 3 days, and it was difficult to satisfy the strength requirement in 3 days. The lithium slag of example 2 is used alone, although the strength loss is not too large in 3 days, the reduction is large in 28 days, and the setting time is long, so that the requirement of normal construction cannot be met. For this reason, we adopted the water granulated slag and the lithium slag to be mixed simultaneously with the limestone and the over-burnt coal gangue to test and produce the cement with the grade of 42.5, which is shown in the table 4.
TABLE 4 Small grind test results
As can be seen from Table 4, the lithium slag in two different places replaces part of the grain slag as the mixed material, and the various physical properties of the lithium slag are basically equivalent to each other and can basically meet the various physical properties of the 42.5 cement.
In conclusion, the results of the small grinding test can be obtained, and meanwhile, production practices prove that 3 parts of the water granulated slag are replaced by 3 parts of the lithium slag, so that the cost can be saved, and meanwhile, the industrial waste slag of a lithium power plant can be digested, and if the lithium slag is not used, a large amount of land is occupied without fail, and the environmental protection pressure is brought. Good social benefits are brought after digestion.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A process for producing cement by using lithium slag as a cement admixture instead of partial water slag is characterized by comprising the following operation steps:
s1, crushing and conveying coal gangue and limestone:
the coal gangue and limestone stored in the piling shed are poured into respective receiving hoppers by a loader, are discharged by the receiving hoppers and are conveyed to a crusher by a plate type feeding machine for crushing, and the crushed materials are respectively conveyed to a coal gangue batching warehouse and a limestone storage batching warehouse of a cement batching plant by a rubber belt conveyor;
s2, stacking and conveying desulfurized gypsum, water granulated slag and lithium slag:
pouring the desulfurized gypsum, the grain slag and the lithium slag stored in the shed into respective corresponding steel hoppers by a loader, and respectively conveying the desulfurized gypsum, the grain slag and the lithium slag to a desulfurized gypsum batching storehouse and a slag batching storehouse of a cement batching station by a rod valve and a belt conveyor, wherein a slag mixture of the grain slag and the lithium slag mixed according to a certain weight ratio is stored in the slag batching storehouse;
s3, batching:
the cement batching plant is provided with five batching storehouses which are respectively used for storing clinker, coal gangue, limestone, desulfurized gypsum and slag, a set of batching scale is respectively arranged below each batching storehouse, the five materials are matched according to a preset proportion according to the variety of produced cement and are respectively sent to a cement grinding system by a rubber belt conveyor, wherein the slag is water slag and lithium slag;
s4, cement grinding:
the cement grinding adopts a semi-final grinding system consisting of a roller press, a powder selecting machine, a ball mill and a semi-final grinding multi-stage powder selecting machine to carry out powder treatment.
2. The process for producing cement by using the lithium slag as a cement admixture instead of part of the water slag according to claim 1, which is characterized by comprising the following steps of: in S2, when the water granulated slag does not enter the hopper, the water content is controlled below 13%, and the diameter of the fineness is 15-66 mm.
3. The process for producing cement by using the lithium slag as a cement admixture instead of part of the water slag according to claim 1, which is characterized by comprising the following steps of: the lithium slag is industrial waste slag generated by high-temperature roasting and acid roasting at 1300 ℃ of 1200-temperature and normal-pressure water leaching of lithium concentrate, liquid-solid separation and the like.
4. The process for producing cement by using the lithium slag as a cement admixture instead of part of the water slag according to claim 1, which is characterized by comprising the following steps of: calculated according to the parts by weight: the lithium slag comprises the following components: 3-8.51 parts of SiO2: 35-65 parts of Al2O3: 18.3-23.6 parts of Fe2O3: 1-3 parts of CaO: 1.1-2.36 parts of MgO: 1.1-9.7 parts of SO3: 0.1-18.9 parts and H2O: 16-24 parts.
5. The process for producing cement by using the lithium slag as a cement admixture instead of part of the water slag according to claim 1, which is characterized by comprising the following steps of: calculated according to the parts by weight: the clinker component is SiO2: 22.02-30.2 parts of Al2O3: 4-6 parts of Fe2O3: 2-4.5 parts of CaO: 60-70.9 parts of MgO: 1-2.3 parts of fCaO: 0.3 to 1.5 portions.
6. The process for producing cement by using the lithium slag as a cement admixture instead of part of the water slag according to claim 1, which is characterized by comprising the following steps of: the lithium slag and the granulated slag in the slag batching library are mixed according to the proportion of 1:1, matching.
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| CN202010092605.3A CN111187012A (en) | 2020-02-14 | 2020-02-14 | Process for producing cement by using lithium slag as cement admixture instead of partial water slag |
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| CN202010092605.3A CN111187012A (en) | 2020-02-14 | 2020-02-14 | Process for producing cement by using lithium slag as cement admixture instead of partial water slag |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111672571A (en) * | 2020-06-25 | 2020-09-18 | 江西九岭新能源有限公司 | Method and device for utilizing lepidolite roasting slag |
| CN112079589A (en) * | 2020-09-15 | 2020-12-15 | 中建西部建设西南有限公司 | Modified lithium slag complex mineral admixture and preparation and application thereof |
| CN118063171A (en) * | 2024-04-18 | 2024-05-24 | 四川省建筑科学研究院有限公司 | High-ductility concrete and preparation method thereof |
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| CN1103631A (en) * | 1994-09-16 | 1995-06-14 | 新疆锂盐厂 | Lithium slag portland cement |
| CN101671133A (en) * | 2009-09-30 | 2010-03-17 | 永州市中大特种水泥有限责任公司 | Modified low-alkalinity sulphoaluminate cement |
| US20170226010A1 (en) * | 2016-02-09 | 2017-08-10 | Vhsc, Ltd. | Lithium Infused Processed Fly Ash for the Production of High Strength Cementitious Products |
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2020
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Patent Citations (3)
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| CN1103631A (en) * | 1994-09-16 | 1995-06-14 | 新疆锂盐厂 | Lithium slag portland cement |
| CN101671133A (en) * | 2009-09-30 | 2010-03-17 | 永州市中大特种水泥有限责任公司 | Modified low-alkalinity sulphoaluminate cement |
| US20170226010A1 (en) * | 2016-02-09 | 2017-08-10 | Vhsc, Ltd. | Lithium Infused Processed Fly Ash for the Production of High Strength Cementitious Products |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111672571A (en) * | 2020-06-25 | 2020-09-18 | 江西九岭新能源有限公司 | Method and device for utilizing lepidolite roasting slag |
| CN112079589A (en) * | 2020-09-15 | 2020-12-15 | 中建西部建设西南有限公司 | Modified lithium slag complex mineral admixture and preparation and application thereof |
| CN118063171A (en) * | 2024-04-18 | 2024-05-24 | 四川省建筑科学研究院有限公司 | High-ductility concrete and preparation method thereof |
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