CN113816631A - Magnesium silicate composite cementing material and preparation method thereof - Google Patents
Magnesium silicate composite cementing material and preparation method thereof Download PDFInfo
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- CN113816631A CN113816631A CN202111146346.9A CN202111146346A CN113816631A CN 113816631 A CN113816631 A CN 113816631A CN 202111146346 A CN202111146346 A CN 202111146346A CN 113816631 A CN113816631 A CN 113816631A
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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
- C04B9/00—Magnesium cements or similar cements
- C04B9/20—Manufacture, e.g. preparing the batches
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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
- C04B9/00—Magnesium cements or similar cements
- C04B9/02—Magnesium cements containing chlorides, e.g. Sorel 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
- C04B9/00—Magnesium cements or similar cements
- C04B9/04—Magnesium cements containing sulfates, nitrates, phosphates or fluorides
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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
- C04B9/00—Magnesium cements or similar cements
- C04B9/06—Cements containing metal compounds other than magnesium compounds, e.g. compounds of zinc or lead
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- 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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- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
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- Manufacturing & Machinery (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a magnesium silicate composite cementing material and a preparation method thereof. The preparation method can comprise the following steps: drying, crushing and crushing a raw material containing a serpentine mineral to obtain powder containing the serpentine mineral; calcining the powder containing serpentine minerals to obtain active magnesium silicate powder; and (3) matching the activated magnesium silicate powder with an auxiliary agent to obtain the magnesium silicate composite gel material. The magnesium silicate composite cementing material comprises a product prepared according to the method. The invention can reduce the cement consumption, is beneficial to reducing carbon emission and environmental pollution, realizes the resource utilization of the serpentine-containing mineral solid waste, and expands the source and range of the cementing material.
Description
Technical Field
The invention relates to the field of energy treatment and utilization, in particular to a magnesium silicate composite cementing material and a preparation method thereof.
Background
At present, the main active components of the inorganic cementing materials applied in China, such as cement, lime, gypsum and the like, are all calcareous cementing materials. Whether cement or lime, a large amount of CO is produced in the production process2Today, with the increasing severity of greenhouse effect, how to reduce carbon emission and realize carbon neutralization has become a significant problem to be considered at a national level.
In addition, a large amount of domestic serpentine-containing solid wastes can only be stockpiled for treatment due to lack of an effective resource approach, and have potential pollution to the surrounding environment while occupying valuable land resources.
Therefore, the preparation of the gelled material by using the mineral waste has important significance.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, it is an object of the present invention to provide a novel cement and a method for preparing the same.
In order to achieve the above objects, one aspect of the present invention provides a method for preparing a magnesium silicate composite cementitious material.
The preparation method can comprise the following steps: drying, crushing and crushing a raw material containing a serpentine mineral to obtain powder containing the serpentine mineral; calcining the powder containing serpentine minerals to obtain active magnesium silicate powder; and (3) matching the activated magnesium silicate powder with an auxiliary agent to obtain the magnesium silicate composite gel material.
Further, the serpentine mineral-containing raw material comprises at least one of serpentine, serpentine beneficiation tailings, serpentine waste rock stripped in a chrysotile mining process, tailings discharged in a chrysotile beneficiation process, and ultrabedrock type metal mineral beneficiation tailings.
Further, the main mineral composition of the powder containing the serpentine mineral is serpentine, and meanwhile, the powder contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
Further, the particle size of the serpentine mineral-containing powder is 75 μm or less.
Furthermore, the serpentine mineral-containing powder comprises 25-40% of MgO and 35-40% of SiO2、2％～10％CaO、5％～15％Fe2O3And 1 to 5% of Al2O3。
Furthermore, the calcining temperature of the calcining treatment can be 600-900 ℃, and the calcining time can be less than 1.5 h.
Further, the calcination treatment is carried out in a calciner, which comprises a shaft kiln, a rotary kiln, a pre-decomposition kiln or a suspension kiln.
Furthermore, the active magnesium silicate powder can contain 5-25% of forsterite crystal phase.
Further, the activated magnesium silicate powder can be mainly an amorphous phase product of magnesium oxide and silicon oxide.
Further, the auxiliary agent comprises one or two combinations of alkali auxiliary agents, salt auxiliary agents and acid auxiliary agents, wherein the alkali auxiliary agents and the acid auxiliary agents cannot be used simultaneously under the condition of adopting the two combinations; wherein the alkali auxiliary agent comprises at least one of quick lime, slaked lime, water glass and cement; the salt auxiliary agent comprises at least one of calcined gypsum, magnesium sulfate and magnesium chloride; the acid auxiliary agent comprises at least one of phosphoric acid, sulfuric acid and hydrochloric acid.
Further, the mass ratio of the activated magnesium silicate powder particles to the auxiliary agent can be 79-91: 9 to 21.
The invention also provides a magnesium silicate composite cementing material.
The magnesium silicate composite cementing material is prepared by the preparation method of the magnesium silicate composite cementing material.
Further, the magnesium silicate composite cementing material has air hardness after being uniformly mixed with water, and the density of a formed and cured solidified body is 1.8-2.4 g/cm3The compressive strength can reach M2.5-M10.
Further, the magnesium silicate composite cementing material is mixed with standard sand and water, and is molded and cured to obtain a cured body, wherein the density of the cured body is 2-2.5 g/cm3The compression strength is M2.5-M40. Compared with the prior art, the beneficial effects of the invention can comprise at least one of the following:
(1) the invention carries out phase detoxification treatment on dangerous solid waste containing serpentine minerals, such as roasting and phase inversion detoxification treatment on asbestos-containing waste, realizes resource utilization of various asbestos-containing waste, and has important ecological and sustainable development significance on resource protection, saving and high-value utilization.
(2) The invention can treat the national dangerous solid wastes such as serpentine containing serpentine and serpentine dressing tailings, serpentine waste rock stripped in the chrysotile mining process, tailings discharged in the chrysotile dressing process, super-basic rock type metal mineral dressing tailings and the like, and has important ecological and environmental significance for the safety of tailings reservoirs, environmental protection, utilization of waste resources and the like.
(3) The dangerous solid waste containing serpentine minerals is heated and calcined, so that the components, the structure, the appearance and the performance of the asbestos minerals are completely changed, and the dangerous solid waste is prepared into the magnesium silicate component cementing material composite cementing material, so that waste is changed into valuable.
(4) The invention takes the active magnesium silicate powder as the main raw material to prepare the composite gelled material, expands the source and the range of the gelled material, is beneficial to promoting the construction of domestic infrastructure, effectively relieves the increasingly tense contradiction of building materials in the urbanization process, simultaneously favorably promotes the application of the magnesium gelled material, and actively responds to the solid waste material recycling policy vigorously advocated and popularized by China.
(5) The invention adopts the active magnesium silicate powder as the main raw material for preparing the composite cementing material for the first time, can reduce the cement consumption, is beneficial to reducing the carbon emission and environmental pollution, realizes the resource utilization of the serpentine-containing mineral solid wastes, is beneficial to protecting the environment, saving land resources and changing waste into valuable, provides a new idea for the non-toxic harmless treatment of hazardous wastes, and has important ecological, environmental, economic and social benefits.
Detailed Description
Hereinafter, a novel magnesium silicate composite cementitious material and a method for preparing the same according to the present invention will be described in detail with reference to exemplary embodiments.
The inventor finds that: as magnesium in the same family with calcium, partial magnesium materials such as magnesium silicate, magnesium oxide and the like have good gelling property under certain conditions, and can be used for preparing magnesium gelling materials. The magnesian cementing material has the advantages of good compressive strength, low pH value (compared with the traditional portland cement) and the like, has the characteristic that the hydration product can form enstatite and olivine after being calcined, and has wide application and development prospects in the fields of building materials and refractory materials. Meanwhile, the serpentine-containing solid waste mainly contains magnesium and silicon dioxide, and can be converted into an active cementing material without adverse effect on the environment by the treatment method, so that the potential safety hazard of the environment is eliminated, waste is turned into wealth, the resource is prevented from being left unused and wasted, the calcium cementing material is replaced by the serpentine-containing solid waste, the carbon emission of the calcium cementing material can be effectively reduced, and the serpentine-containing solid waste has important economic, ecological, environmental-friendly and social benefits.
Exemplary embodiment 1
The preparation method of the magnesium silicate composite cementing material comprises the following steps:
step 1: drying, crushing and crushing the raw material containing the serpentine mineral under the negative pressure condition to obtain the powder containing the serpentine mineral.
The serpentine mineral-containing raw material can comprise one or more of serpentine, serpentine beneficiation tailings, serpentine waste rock stripped in a chrysotile mining process, tailings discharged in a chrysotile beneficiation process, and ultrabasic rock type metal mineral beneficiation tailings.
Further, the main chemical composition of the powder may include, by mass: 25-40% of MgO and SiO235～40％，CaO 2～10％，Fe2O3 5～15％，Al2O3 1～5％，H2O+8-15% (bound water).
Further, the particle size of the powder is 75 μm or less, for example, 10 to 75 μm. The granularity of the powder is too fine, which is beneficial to improving the performance of the product in the later period, but the processing cost is too high, and the cost performance is lower; the over-coarse powder particle size leads to low activity of the prepared composite cementing material, which is not beneficial to practical application, so the particle size of the powder has an optimal range, and the powder has better cost performance in the range.
Further, the main mineral composition of the powder is serpentine, and the powder contains a small amount of but not limited to talc, magnetite, chlorite, magnesite, olivine, pyroxene and the like.
Furthermore, the drying, crushing and crushing are carried out under negative pressure so as to reduce the diffusion of dust and reduce the pollution to the surrounding environment, and the absolute pressure of the negative pressure vacuum degree can be 1.8-2.6 kpa.
Step 2: and (3) putting the powder containing the serpentine mineral obtained in the step (1) into a calcining furnace for heating, calcining and activating to obtain the activated magnesium silicate powder.
Further, the calcining furnace includes, but is not limited to, a shaft kiln, a rotary kiln, a pre-decomposition kiln, a suspension kiln, etc.
The calcination temperature can be 600 ℃ to 900 ℃ (based on 600 ℃ to 900 ℃), such as 660 ℃, 700 ℃, 750 ℃, 800 ℃, 890 ℃ and the like; the calcination time may be 3min to 1.5h, for example, 10min, 30min, 50min, 60min, 80min, etc. The main purpose of calcination is to convert the powder mainly containing serpentine mineral raw material into an amorphous product with active magnesium silicate powder mainly containing magnesium oxide and silicon oxide, so as to improve the reactivity of the powder and contain a small amount of olivine crystal phase. When the calcination temperature is too low, the conversion rate of the amorphous product is low and cannot reach the calcination purpose, and the calcination temperature is too high, the amorphous product is mainly converted into a crystal phase, so that the activity of the gelled material can be obviously reduced, the calcination time is also the same, and the gelling property of the powder can be reduced when the calcination time is too short or too long, so that the optimum temperature and the optimum time range are provided.
Further, the particle size of the activated magnesium silicate powder may be 10 μm to 75 μm, for example, 20, 30, 40, 50, 60, 74 μm or the like. If the particle size of the powder is too fine, although the activity of the cementing material is improved, the processing cost of raw materials is increased, or the calcined material needs to be subjected to secondary grinding, the preparation process and the cost are greatly increased, the particle size is too coarse, the activity of the composite cementing material is obviously reduced, and when the particle size is in the range, the processing cost and the performance can be considered at the same time, so that the optimal particle size range is provided.
The active magnesium silicate powder contains amorphous silicon dioxide and amorphous magnesium oxide as main components, and further contains a small amount of olivine crystals.
And step 3: and (3) matching the activated magnesium silicate powder obtained in the step (2) with an auxiliary agent to obtain the magnesium silicate composite cementing material.
Further, auxiliaries are of three general classes: the alkali type auxiliary agent, the salt type auxiliary agent or the acid type auxiliary agent are included, a single type or a combination of the two types of auxiliary agents can be selected during practical application, and when the two types of auxiliary agents are combined, the alkali type auxiliary agent and the acid type auxiliary agent cannot be used simultaneously. The auxiliary agent is used for exciting the activity of the amorphous silicon dioxide and the magnesium oxide and improving the service performance of the composite gelled material.
Wherein, the alkali auxiliary agent: one or more of quick lime, slaked lime, water glass and cement.
Salt auxiliary agent: one or more of plaster of paris, magnesium sulfate and magnesium chloride.
Acid auxiliary agent: one or more of phosphoric acid, sulfuric acid and hydrochloric acid.
Further, the mass ratio of the active magnesium silicate powder to the auxiliary agent is 79-91: 21-9, for example 80-90: 20-10, for example, 82-88: 12-18, further example 85: 15.
the active magnesium silicate powder prepared by the invention contains active silicon oxide SiO2And active magnesium oxide (MgO), and the hydration product formed by the reaction of the active magnesium oxide and the auxiliary agent has gelling property.
Wherein, active SiO2Can react with calcium oxide and cement (calcium hydroxide in hydration reaction process) to form sheet or needle calcium silicate hydrate;
the active MgO can react with magnesium sulfate (or sulfuric acid) and magnesium chloride (or hydrochloric acid) to form basic magnesium sulfate and basic magnesium chloride (whiskers);
active MgO and active SiO2Can be hydrated with calcined gypsum and calcium oxide to form sheet or needle calcium silicate hydrate and basic magnesium sulfate whisker;
active MgO and active SiO2Reacting with water glass (sodium silicate) to form a silicic acid network, wherein sodium hydroxide generated in the process promotes the formation of hydrated calcium silicate;
active MgO and active SiO2React with CaO and magnesium sulfate simultaneouslyBasic magnesium sulfate and deepened calcium silicate can be formed, and the like.
Therefore, the magnesium silicate composite cementing material can form a stone body after being hydrated.
According to the invention, the magnesium silicate composite cementing material is prepared by taking the active magnesium silicate powder as a main raw material, so that waste is turned into wealth, a large amount of serpentine-containing solid waste is consumed, land resources are saved, the influence and harm to the environment are reduced, the range of the cementing material can be widened, the dependence on cement type cementing materials is reduced, energy is saved, emission is reduced, the excavation and exploitation of limestone and clay are reduced, the ecology and the environment are protected, and the magnesium silicate composite cementing material has wide market prospect, social benefits and economic benefits.
In order that the above-described exemplary embodiments of the invention may be better understood, further description thereof with reference to specific examples is provided below.
Example 1
A preparation method of a magnesium silicate composite cementing material comprises the following steps:
(1) drying and crushing serpentine beneficiation tailings under the negative pressure of 1.8kpa to obtain powder mainly containing serpentine minerals with the particle size of 30-50 microns, wherein the obtained powder mainly containing the serpentine mineral raw materials mainly comprises the serpentine and simultaneously contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
The powder and particle body comprises the following main chemical components in percentage by mass: MgO 26%, SiO239％，CaO 10％，Fe2O3 14％，Al2O3 2％，H2O+7％。
(2) And (3) calcining the powder mainly containing the serpentine mineral raw material obtained in the step (1) in a calcining furnace at 650 ℃ for 60min to obtain the activated magnesium silicate powder.
(3) And (3) matching the active magnesium silicate powder obtained in the step (2) with quicklime powder according to a mass ratio of 80: 20 to obtain the magnesium silicate composite gel material taking the active magnesium silicate powder as the main raw material.
(4) Mixing magnesium silicate composite cementing material with standard sand and water, molding and curing to obtain solidDensity of chemical compound 2.2g/cm3The compressive strength was M15.
Example 2
A preparation method of a magnesium silicate composite cementing material comprises the following steps:
(1) drying and crushing serpentine beneficiation tailings under the negative pressure of 2.0kpa to obtain powder mainly containing serpentine minerals with the particle size of 10-30 microns, wherein the obtained powder mainly containing the serpentine mineral raw materials mainly comprises the serpentine and simultaneously contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
The powder and particle body comprises the following main chemical components in percentage by mass: MgO 39%, SiO235％，CaO5％，Fe2O3 7％，Al2O3 3％，H2O+9％。
(2) And (3) calcining the powder mainly containing the serpentine mineral raw material obtained in the step (1) in a calcining furnace at 850 ℃ for 10min to obtain the activated magnesium silicate powder.
(3) And (3) matching the activated magnesium silicate powder obtained in the step (2) with phosphoric acid according to a mass ratio of 90: 10 to obtain the magnesium silicate composite gel material taking the active magnesium silicate powder as the main raw material.
(4) Mixing the magnesium silicate composite gelled material with standard sand and water, molding and curing to obtain a cured body with the density of 2.4g/cm3The compressive strength was M30.
Example 3
A preparation method of a magnesium silicate composite cementing material comprises the following steps:
(1) drying and crushing serpentine beneficiation tailings under the negative pressure of 2.2kpa to obtain powder mainly containing serpentine minerals with the particle size of 50-75 microns, wherein the obtained powder mainly containing the serpentine mineral raw materials mainly comprises the serpentine and simultaneously contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
The powder and particle body comprises the following main chemical components in percentage by mass: MgO 29%, SiO238％，CaO8％，Fe2O3 9％，Al2O3 5％，H2O+9％。
(2) And (3) putting the powder mainly containing the serpentine mineral raw material obtained in the step (1) into a calcining furnace, and calcining at 750 ℃ for 30min to obtain the activated magnesium silicate powder.
(3) And (3) matching the active magnesium silicate powder obtained in the step (2) with calcined gypsum according to the mass ratio of 85: 15 to obtain the magnesium silicate composite cementing material taking the active magnesium silicate powder as the main raw material.
(4) Mixing magnesium silicate composite gelled material with standard sand and water, molding and curing to obtain a cured body with the density of 2.1g/cm3The compressive strength was M7.5.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A preparation method of a magnesium silicate composite cementing material is characterized by comprising the following steps:
drying, crushing and crushing a raw material containing a serpentine mineral to obtain powder containing the serpentine mineral;
calcining the powder containing serpentine minerals to obtain active magnesium silicate powder;
and (3) matching the activated magnesium silicate powder with an auxiliary agent to obtain the magnesium silicate composite gel material.
2. The method for preparing the magnesium silicate composite cementitious material according to claim 1, wherein the raw material containing serpentine minerals comprises at least one of serpentine, serpentine beneficiation tailings, serpentine waste rock stripped in chrysotile mining, tailings discharged in chrysotile beneficiation, and ultrabedrock type metal mineral beneficiation tailings.
3. The method for producing a magnesium silicate composite cementitious material as claimed in claim 1, wherein the particle size of the serpentine mineral-containing powder is 75 μm or less.
4. The method for preparing the magnesium silicate composite cementitious material as claimed in claim 1, wherein the powder containing serpentine mineral comprises 25-40% of MgO and 35-40% of SiO2、2％～10％CaO、5％～15％Fe2O3And 1 to 5% of Al2O3。
5. The method for preparing a magnesium silicate composite cementitious material according to claim 1, characterized in that the calcination temperature of the calcination treatment is 600 ℃ to 900 ℃ and the calcination time is less than 1.5 h.
6. The method for preparing the magnesium silicate composite cementing material according to claim 1, wherein the activated magnesium silicate powder contains 5-25% of forsterite crystal phase.
7. The method for preparing a magnesium silicate composite cementitious material as claimed in claim 1, wherein the auxiliary agent comprises one or two combinations of alkali auxiliary agents, salt auxiliary agents and acid auxiliary agents, wherein in the case of adopting the two combinations, the alkali auxiliary agents and the acid auxiliary agents cannot be used at the same time; wherein the content of the first and second substances,
the alkali auxiliary agent comprises at least one of quick lime, slaked lime, water glass and cement;
the salt auxiliary agent comprises at least one of calcined gypsum, magnesium sulfate and magnesium chloride;
the acid auxiliary agent comprises at least one of phosphoric acid, sulfuric acid and hydrochloric acid.
8. The preparation method of the magnesium silicate composite cementing material according to claim 1, wherein the mass ratio of the activated magnesium silicate powder particles to the auxiliary agent is 79-91: 9 to 21.
9. A method for producing a magnesium silicate composite cementitious material, characterized in that the magnesium silicate composite cementitious material is produced by the method for producing a magnesium silicate composite cementitious material according to any one of claims 1 to 8.
10. The method for preparing the magnesium silicate composite cementitious material as claimed in claim 9, wherein the magnesium silicate composite cementitious material has air hardness after being uniformly mixed with water;
the magnesium silicate composite cementing material is mixed with standard sand and water, and a solidified body is obtained after molding and curing, wherein the density of the solidified body is 2-2.5 g/cm3The compression strength is M2.5-M40.
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| CN115057638A (en) * | 2022-06-29 | 2022-09-16 | 武汉科技大学 | Calcium silicate hydrate and magnesium silicate hydrate gel material for mine filling and preparation method thereof |
| CN116063054A (en) * | 2023-01-29 | 2023-05-05 | 东南大学 | Serpentine carbon-fixing foam light soil and preparation method thereof |
| CN116875098A (en) * | 2023-07-26 | 2023-10-13 | 北京科技大学 | Carbon steel high-temperature heat treatment protective coating and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115057638A (en) * | 2022-06-29 | 2022-09-16 | 武汉科技大学 | Calcium silicate hydrate and magnesium silicate hydrate gel material for mine filling and preparation method thereof |
| CN116063054A (en) * | 2023-01-29 | 2023-05-05 | 东南大学 | Serpentine carbon-fixing foam light soil and preparation method thereof |
| CN116063054B (en) * | 2023-01-29 | 2023-11-14 | 东南大学 | Serpentine carbon-fixing foam light soil and preparation method thereof |
| CN116875098A (en) * | 2023-07-26 | 2023-10-13 | 北京科技大学 | Carbon steel high-temperature heat treatment protective coating and preparation method thereof |
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