CN114890699B - Cementing material prepared from fluorogypsum and preparation method thereof - Google Patents
Cementing material prepared from fluorogypsum and preparation method thereof Download PDFInfo
- Publication number
- CN114890699B CN114890699B CN202210652880.5A CN202210652880A CN114890699B CN 114890699 B CN114890699 B CN 114890699B CN 202210652880 A CN202210652880 A CN 202210652880A CN 114890699 B CN114890699 B CN 114890699B
- Authority
- CN
- China
- Prior art keywords
- fluorogypsum
- component
- preheating
- fluorine gypsum
- gypsum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/266—Chemical gypsum
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a cementing material prepared from fluorogypsum and a preparation method thereof, belonging to the technical field of comprehensive utilization of solid wastes. The preparation method of the fluorine gypsum-made cementing material comprises the following steps: a. heating the fluorogypsum to 120-600 ℃ and preheating for 10-25S; b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃; c. and (3) cooling the fluorine gypsum subjected to boiling calcination in the step (b) to 60-100 ℃, mixing with an exciting agent, and grinding to obtain the fluorine gypsum cementing material. The method of the invention prepares the high-quality cementing material by taking the fluorogypsum as the raw material, so that the fluorogypsum is recycled and harmless, and the method is an important way for promoting the comprehensive utilization of industrial solid waste by the fluoride industry, preventing and controlling pollution, protecting the environment and improving the economic benefit.
Description
Technical Field
The invention relates to a cementing material prepared from fluorogypsum and a preparation method thereof, belonging to the technical field of comprehensive utilization of solid wastes.
Background
The fluorogypsum is waste residue generated when fluorite and sulfuric acid are used for preparing hydrofluoric acid. The fluorogypsum is also called as fluorite, white powder, except that part of the fluorogypsum is used as a cement retarder of a cement plant, other market applications are few, and the fluorogypsum is mainly piled up.
The current method for producing hydrogen fluoride mainly uses sulfuric acid to acidolysis fluorite, and can theoretically produce 1t hydrogen fluoride and by-produce 3.4t fluorite, and the emission of fluorite is huge every year. Because the fluorine gypsum contains a small amount of residual sulfuric acid and hydrofluoric acid, the emission is large, and especially the fluorine ions are easy to enter the water body and cause serious environmental pollution. Along with the continuous increase of the emission of the fluorine gypsum, the problems of more impurities, complex components, extremely slow hydration of the main components of the anhydrous gypsum and the like in the fluorine gypsum are added, so that the anhydrous gypsum seriously affects the environment, the utilization difficulty is high, and only the traditional fields of cement retarder and the like are partially studied at present. The pressure for comprehensive utilization of resources is increased. Along with the vigorous development of fluorine chemical industry, a large amount of fluorine gypsum is inevitably generated. How to effectively utilize the industrial waste residue, change waste into valuable and protect the environment is an urgent work. The industrial waste residue is utilized in situ, the recycling of the waste residue is realized, and the method is an advantageous means for saving the cost and improving the economic benefit for enterprises.
In addition to sulfuric acid and hydrofluoric acid, the main component of the fluorogypsum (piled or fresh) is type II anhydrous gypsum, which is insoluble or insoluble, and has potential hydration activity, but the fluorogypsum has slow hydration rate, so that development and utilization are "bottlenecks". The hydrated fluorine gypsum is accelerated to have certain strength by adding the exciting agent, but the due gelatinization performance of the gypsum is not exerted.
CN103130484a discloses a fluorogypsum binding gypsum powder, which comprises the following raw materials in parts by weight: anhydrous fluorine gypsum powder: 68-70 parts of P (phosphogypsum powder): 12-18 parts of neutralizer: 1-6 parts of cement: 7-10 parts of fly ash: 3-10 parts of retarder: 0.05-0.5 part of water-retaining agent: 0.01-0.5 part of adhesive: 0.1-0.5 part, the advantages of the invention are as follows: the fluorine gypsum bonding gypsum powder has the advantages of simple manufacturing process, short period, no toxicity, no smell, environmental protection, no cracking, good fire resistance, high bonding strength, convenient construction and low manufacturing cost, and is suitable for substrates of various different materials. However, the strength is low, the product performance is sensitive to fluorogypsum impurities, and the product performance is unstable.
Disclosure of Invention
It is a first object of the present invention to provide a novel fluorogypsum-made cementitious material.
In order to achieve the first object of the present invention, the preparation method of the fluorogypsum-made cementing material comprises the following steps:
a. heating the fluorogypsum to 120-600 ℃ and preheating for 10-25S;
b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃;
c. and (3) cooling the fluorine gypsum subjected to boiling calcination in the step (b) to 60-100 ℃, mixing with an exciting agent, and grinding to obtain the fluorine gypsum cementing material.
In a specific embodiment, the preheating in step a is a secondary preheating, the primary preheating material is from 120 ℃ to 350 ℃, and the secondary preheating material is from 350 ℃ to 550 ℃.
In a specific embodiment, the particle size range of the fluorogypsum in step a is less than 1mm, preferably less than 0.6 mm.
In a specific embodiment, the fluorogypsum in step a is anhydrous fluorogypsum; the preparation method of the anhydrous fluorine gypsum preferably comprises the following steps: drying the fluorine gypsum containing water at 350-550 ℃; the drying time is preferably 3-5 seconds;
preferably, the temperature of the anhydrous fluorine gypsum before preheating is below 120 ℃.
In one embodiment, the boiling calcination in step b is performed for a period of 10 to 20 seconds.
In a specific embodiment, the cooling in the step c is to cool to below 200 ℃ firstly and then cool to below 100 ℃ by air;
the rotational speed of the grinding powder is 20-30 rpm.
In a specific embodiment, the weight ratio of the calcined fluorogypsum to the exciting agent in the step c is as follows: 94-99:6-1; the exciting agent is preferably a sulfate exciting agent, more preferably a mixture of a component A and a component B, wherein the component A is at least one of potassium sulfate, sodium sulfate and sulfoaluminate cement, the component B is at least one of methylcellulose, fly ash, carboxymethyl cellulose or dextrin water-retaining agent, and the mass ratio of the component A to the component B is 1-3: 2 to 6.
The second aim of the invention is to provide a preparation method of the fluorine gypsum-made cementing material.
In order to achieve the second object of the present invention, the preparation method of the fluorogypsum-made cementing material comprises the following steps:
a. heating the fluorogypsum to 120-600 ℃ and preheating for 10-25S;
b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃, wherein the boiling and calcining time is preferably 10-20 seconds;
c. and (3) cooling the fluorine gypsum subjected to boiling calcination in the step (b) to 60-100 ℃, mixing with an exciting agent, and grinding to obtain the fluorine gypsum cementing material.
In a specific embodiment, the preheating in the step a is a secondary preheating, wherein the first-stage preheating material is from 120 ℃ to 350 ℃, and the second-stage preheating material is from 350 ℃ to 550 ℃;
the particle size range of the fluorine gypsum in the step a is less than 1mm, preferably less than 0.6 mm;
a, the fluorine gypsum in the step a is anhydrous fluorine gypsum; the preparation method of the anhydrous fluorine gypsum preferably comprises the following steps: drying the fluorine gypsum containing water at 350-550 ℃; the drying time is preferably 3-5 seconds;
preferably, the temperature of the anhydrous fluorine gypsum before preheating is below 120 ℃;
c, cooling to 200 ℃ or lower, and then air-cooling to 100 ℃ or lower;
the rotational speed of the grinding powder is 20-30 rpm.
In a specific embodiment, the weight ratio of the calcined fluorogypsum to the exciting agent in the step c is as follows: 94-99:6-1; the exciting agent is preferably a sulfate exciting agent, more preferably a mixture of a component A and a component B, wherein the component A is at least one of potassium sulfate, sodium sulfate and sulfoaluminate cement, the component B is at least one of methylcellulose, fly ash, carboxymethyl cellulose or dextrin water-retaining agent, and the mass ratio of the component A to the component B is 1-3: 2 to 6.
The beneficial effects are that:
1. the method takes the fluorogypsum as the raw material to prepare the high-quality cementing material, wherein the initial setting time is more than or equal to 1.5 hours, and the average time is 3.0 hours; the final setting time is less than or equal to 8 hours, the average compressive strength of the 28d strength is 5.3 hours, the average compressive strength of the 28d strength is 38.5Mpa (the compressive strength of the 28d strength is more than or equal to 30 Mpa), and the softening coefficient is 0.65-0.85, thus being an ideal cementing material. (note: initial and final setting time can be adjusted according to the exciter)
2. The method for producing the high-quality gypsum cementing material by using the fluorine gypsum makes the fluorine gypsum recycled and harmless, and is an important way for fluoride industry to promote the comprehensive utilization of industrial solid wastes, prevent and treat pollution, protect the environment and improve the economic benefit.
3. The method is simple, the calcination intensity in a short time is greatly improved, and the solid waste of the fluorine gypsum can be treated in a large scale to prepare the gypsum cementing material; and the method can also realize large-scale continuous online production, has high efficiency and is beneficial to industrialized popularization and application.
Detailed Description
In order to achieve the first object of the present invention, the preparation method of the fluorogypsum-made cementing material comprises the following steps:
a. heating the fluorogypsum to 120-600 ℃ and preheating for 10-25S;
b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃;
c. and (3) cooling the fluorine gypsum subjected to boiling calcination in the step (b) to 60-100 ℃, mixing with an exciting agent, and grinding to obtain the fluorine gypsum cementing material.
In a specific embodiment, the preheating in step a is a secondary preheating, the primary preheating material is from 120 ℃ to 350 ℃, and the secondary preheating material is from 350 ℃ to 550 ℃.
In a specific embodiment, the particle size range of the fluorogypsum in step a is less than 1mm, preferably less than 0.6 mm.
In a specific embodiment, the fluorogypsum in step a is anhydrous fluorogypsum; the preparation method of the anhydrous fluorine gypsum preferably comprises the following steps: drying the fluorine gypsum containing water at 350-550 ℃; the drying time is preferably 3-5 seconds;
preferably, the temperature of the anhydrous fluorine gypsum before preheating is below 120 ℃.
In one embodiment, the boiling calcination in step b is performed for a period of 10 to 20 seconds.
In a specific embodiment, the cooling in the step c is to cool to below 200 ℃ firstly and then cool to below 100 ℃ by air;
the rotational speed of the grinding powder is 20-30 rpm.
In a specific embodiment, the weight ratio of the calcined fluorogypsum to the exciting agent in the step c is as follows: 94-99:6-1; the exciting agent is preferably a sulfate exciting agent, more preferably a mixture of a component A and a component B, wherein the component A is at least one of potassium sulfate, sodium sulfate and sulfoaluminate cement, the component B is at least one of methylcellulose, fly ash, carboxymethyl cellulose or dextrin water-retaining agent, and the mass ratio of the component A to the component B is 1-3: 2 to 6.
The second object of the invention is to provide a preparation method of the fluorine gypsum-made cementing material.
In order to achieve the second object of the present invention, the preparation method of the fluorogypsum-made cementing material comprises the following steps:
a. heating the fluorogypsum to 120-600 ℃ and preheating for 10-25S;
b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃, wherein the boiling and calcining time is preferably 10-20 seconds;
c. and (3) cooling the fluorine gypsum subjected to boiling calcination in the step (b) to 60-100 ℃, mixing with an exciting agent, and grinding to obtain the fluorine gypsum cementing material.
In a specific embodiment, the preheating in the step a is a secondary preheating, wherein the first-stage preheating material is from 120 ℃ to 350 ℃, and the second-stage preheating material is from 350 ℃ to 550 ℃;
the particle size range of the fluorine gypsum in the step a is less than 1mm, preferably less than 0.6 mm;
a, the fluorine gypsum in the step a is anhydrous fluorine gypsum; the preparation method of the anhydrous fluorine gypsum preferably comprises the following steps: drying the fluorine gypsum containing water at 350-550 ℃; the drying time is preferably 3-5 seconds;
preferably, the temperature of the anhydrous fluorine gypsum before preheating is below 120 ℃;
c, cooling to 200 ℃ or lower, and then air-cooling to 100 ℃ or lower;
the rotational speed of the grinding powder is 20-30 rpm.
In a specific embodiment, the weight ratio of the calcined fluorogypsum to the exciting agent in the step c is as follows: 94-99:6-1; the exciting agent is preferably a sulfate exciting agent, more preferably a mixture of a component A and a component B, wherein the component A is at least one of potassium sulfate, sodium sulfate and sulfoaluminate cement, the component B is at least one of methylcellulose, fly ash, carboxymethyl cellulose or dextrin water-retaining agent, and the mass ratio of the component A to the component B is 1-3: 2 to 6.
The following describes the invention in more detail with reference to examples, which are not intended to limit the invention thereto.
Example 1
(1) The fluorine gypsum which is taken from Fujian and piled up for 6 months and contains 3% of free water is dried for 4 seconds at 450 ℃ after being metered, the fluorine gypsum is crushed while being dried, and a coarse particle sedimentation device is arranged at a crushing outlet after crushing, so that the particle size of the fluorine gypsum particles at the outlet is ensured to meet the requirement below 1 mm.
(2) The temperature of the crushed fluorogypsum with the particle size meeting the requirement is about 120 ℃, the dried fluorogypsum is preheated for 15S from 120 ℃ to 550 ℃, the first-stage preheating material is preheated from 120 ℃ to 350 ℃ through the second-stage preheating, and the second-stage preheating material is preheated from 350 ℃ to 550 ℃.
(3) The preheated material enters a calciner to be calcined at 800 ℃ for 12 seconds. Cooling to 180 deg.c, further air cooling to 80 deg.c, mixing with potassium sulfate activator in the rotation speed of 22 rpm, and storing.
Example 2
(1) Fresh fluorogypsum taken from an inner Mongolia production line is metered and then dried at 480 ℃ for 3.5 seconds, the fluorogypsum is crushed while being dried, and a coarse particle sedimentation device is arranged at a crushing outlet after crushing, so that the particle size of the fluorogypsum particles at the outlet is ensured to meet the requirement below 1 mm.
(2) The temperature of the crushed fluorogypsum with the particle size meeting the requirement is about 120 ℃, the dried fluorogypsum is heated to 120-550 ℃ and preheated for 16S, the first-stage preheated material is from 120-350 ℃ and the second-stage preheated material is from 350-550 ℃ through the second-stage preheating.
(3) The preheated material enters a calciner to be calcined at 850 ℃ for 12 seconds. Cooling to 180 deg.c, further air cooling to 80 deg.c, mixing with potassium sulfate activator in the rotation speed of 22 rpm, and storing.
Comparative example 1
Otherwise in accordance with example 1, except for example 1, the stacked fluorogypsum was directly dried, crushed, preheated and then calcined at a temperature of 650 ℃. Cooling to 180 deg.c, further air cooling to 80 deg.c, mixing with potassium sulfate activator in the ratio of 97 to 3, and grinding at speed of 22 rpm.
Table 1 results of the tests of examples 1 and 2, comparative example 1
| Project | Initial setting time | Final setting time | 28d Strength compression Strength | Softening coefficient |
| Example 1 | 3.8 | 5.7 | 41.0 | 0.80 |
| Example 2 | 3.2 | 4.6 | 42.5 | 0.81 |
| Comparative example 1 | 1.4 | 2.2 | 35.1 | 0.61 |
The gypsum cementing material is produced by detecting the fluorine gypsum through multiple experiments, wherein the initial setting time (more than or equal to 1.5 h) is 3.0h on average, the final setting time (less than or equal to 8 h) is 5.3h on average, the 28d strength compressive strength is 38.5MPa on average, and the softening coefficient is 0.65-0.85, thus being an ideal cementing material.
Claims (11)
1. The preparation method of the fluorine gypsum cementing material is characterized by comprising the following steps:
a. heating the fluorogypsum to 120-600 ℃ for preheating for 10-25 s, wherein the preheating in the step a is secondary preheating, the first-stage preheating material is from 120 ℃ to 350 ℃, the second-stage preheating material is from 350 ℃ to 550 ℃, and the fluorogypsum in the step a is anhydrous fluorogypsum;
b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃, wherein the boiling and calcining time is 10-20 seconds;
c. cooling the fluorogypsum subjected to boiling calcination in the step b to 60-100 ℃, mixing with an exciting agent, and grinding to obtain a fluorogypsum cementing material; and c, the weight ratio of the calcined fluorogypsum to the exciting agent is as follows: 94-99:6-1; the exciting agent is a mixture of a component A and a component B, wherein the component A is at least one of potassium sulfate, sodium sulfate and sulfoaluminate cement, the component B is at least one of methylcellulose, fly ash, carboxymethyl cellulose or dextrin water-retaining agent, and the mass ratio of the component A to the component B is 1-3: 2 to 6.
2. The fluorogypsum-made cement according to claim 1, wherein the particle size range of the fluorogypsum in the step a is 1mm or less.
3. The fluorogypsum-made cement according to claim 1, wherein the particle size range of the fluorogypsum in the step a is 0.6mm or less.
4. The fluorogypsum-made cement according to claim 1 or 2, wherein the preparation method of the anhydrous fluorogypsum comprises: and drying the fluorine gypsum containing water at 350-550 ℃.
5. The fluorogypsum-made cement according to claim 4, wherein the preparation method of the anhydrous fluorogypsum comprises: the drying time is 3-5 seconds.
6. The fluorogypsum-made binder according to claim 1 or 2, wherein the temperature of the anhydrous fluorogypsum before preheating is 120 ℃ or lower.
7. The fluorogypsum-made binder of claim 1 or 2, wherein the cooling in step c is to cool to below 200 ℃ and then to below 100 ℃;
the rotational speed of the grinding powder is 20-30 rpm.
8. The method for preparing a fluorogypsum-made binder according to any one of claims 1 to 7, comprising the steps of:
a. heating the fluorogypsum to 120-600 ℃ and preheating for 10-25S; the preheating in the step a is secondary preheating, wherein the temperature of the first-stage preheating material is 120-350 ℃, and the temperature of the second-stage preheating material is 350-550 ℃; a, the fluorine gypsum in the step a is anhydrous fluorine gypsum;
b. b, boiling and calcining the fluorine gypsum preheated in the step a at 700-900 ℃, wherein the boiling and calcining time is 10-20 seconds;
c. cooling the fluorogypsum subjected to boiling calcination in the step b to 60-100 ℃, mixing with an exciting agent, and grinding to obtain a fluorogypsum cementing material; and c, the weight ratio of the calcined fluorogypsum to the exciting agent is as follows: 94-99:6-1; the exciting agent is a mixture of a component A and a component B, wherein the component A is at least one of potassium sulfate, sodium sulfate and sulfoaluminate cement, the component B is at least one of methylcellulose, fly ash, carboxymethyl cellulose or dextrin water-retaining agent, and the mass ratio of the component A to the component B is 1-3: 2 to 6.
9. The method for preparing the fluorogypsum-made cementing material of claim 8, wherein,
the granularity range of the fluorine gypsum in the step a is below 1 mm; c, cooling to below 200 ℃ firstly, and then cooling to below 100 ℃ by air cooling;
the rotational speed of the grinding powder is 20-30 rpm.
10. The method for preparing the fluorogypsum-made cementing material of claim 8, wherein,
the preparation method of the anhydrous fluorine gypsum comprises the following steps: drying the fluorine gypsum containing water at 350-550 ℃; the drying time is 3-5 seconds.
11. The method for producing a fluorine gypsum-based binder according to claim 8, wherein the temperature before preheating the anhydrous fluorine gypsum is 120 ℃ or lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210652880.5A CN114890699B (en) | 2022-06-10 | 2022-06-10 | Cementing material prepared from fluorogypsum and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210652880.5A CN114890699B (en) | 2022-06-10 | 2022-06-10 | Cementing material prepared from fluorogypsum and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114890699A CN114890699A (en) | 2022-08-12 |
| CN114890699B true CN114890699B (en) | 2023-10-03 |
Family
ID=82728061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210652880.5A Active CN114890699B (en) | 2022-06-10 | 2022-06-10 | Cementing material prepared from fluorogypsum and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114890699B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014092667A1 (en) * | 2012-12-14 | 2014-06-19 | Özsüt Mustafa | Pozzolan-quicklime binder |
| SK500622012A3 (en) * | 2012-12-27 | 2014-07-02 | Považská Cementáreň, A.S. | Method for cement production and concrete mixture made by the method |
| CN105060834A (en) * | 2015-08-11 | 2015-11-18 | 安徽锦洋氟化学有限公司 | Fluorogypsum-containing active cementing material |
| CN105967622A (en) * | 2016-05-09 | 2016-09-28 | 马振义 | Insulation mortar prepared by compounding phosphogypsum and fluorgypsum as well as preparation method thereof |
| CN107473685A (en) * | 2016-12-19 | 2017-12-15 | 湖南昌迅科技环保股份有限公司 | A kind of fluorite cream base plastering material for inner wall and its production technology |
| CN108503247A (en) * | 2018-06-21 | 2018-09-07 | 四川方大新型建材科技开发有限责任公司 | Industry by-product gypsum produces the method and apparatus of high temperature gypsum |
| WO2019232687A1 (en) * | 2018-06-05 | 2019-12-12 | 华智节能(香港)有限公司 | Ultra-rapid-hardening special inorganic cement material and preparation method therefor |
| CN114276107A (en) * | 2021-12-24 | 2022-04-05 | 泰山石膏有限公司 | Quick-calcined light plastering gypsum and preparation method thereof |
-
2022
- 2022-06-10 CN CN202210652880.5A patent/CN114890699B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014092667A1 (en) * | 2012-12-14 | 2014-06-19 | Özsüt Mustafa | Pozzolan-quicklime binder |
| SK500622012A3 (en) * | 2012-12-27 | 2014-07-02 | Považská Cementáreň, A.S. | Method for cement production and concrete mixture made by the method |
| CN105060834A (en) * | 2015-08-11 | 2015-11-18 | 安徽锦洋氟化学有限公司 | Fluorogypsum-containing active cementing material |
| CN105967622A (en) * | 2016-05-09 | 2016-09-28 | 马振义 | Insulation mortar prepared by compounding phosphogypsum and fluorgypsum as well as preparation method thereof |
| CN107473685A (en) * | 2016-12-19 | 2017-12-15 | 湖南昌迅科技环保股份有限公司 | A kind of fluorite cream base plastering material for inner wall and its production technology |
| WO2019232687A1 (en) * | 2018-06-05 | 2019-12-12 | 华智节能(香港)有限公司 | Ultra-rapid-hardening special inorganic cement material and preparation method therefor |
| CN108503247A (en) * | 2018-06-21 | 2018-09-07 | 四川方大新型建材科技开发有限责任公司 | Industry by-product gypsum produces the method and apparatus of high temperature gypsum |
| CN114276107A (en) * | 2021-12-24 | 2022-04-05 | 泰山石膏有限公司 | Quick-calcined light plastering gypsum and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 杨淼 ; 郭朝晖 ; 韦小颖 ; 肖细元 ; .氟石膏的改性及其综合利用.有机氟工业.2010,(01),全文. * |
| 王维周等.《化学工程基础》.浙江科学技术出版社,2005,第303页. * |
| 赵云龙等.《石膏干混建材生产及应用技术》.中国建材工业出版社,2016,第14页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114890699A (en) | 2022-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105129744B (en) | A kind of method that ardealite Sulphuric acid co-producing cement is thermally decomposed in advance | |
| CN111205003B (en) | Preparation method of regenerated cementing material | |
| CN106698986B (en) | A kind of preparation method of sulphoaluminate cement clinker | |
| CN108424015A (en) | The method for preparing iron aluminium system high active material using converter slag waste heat collaboration solid waste | |
| CN108623196A (en) | A kind of lime excitation large dosage industrial residue low-carbon cement and preparation method thereof | |
| CN110104984B (en) | Phosphogypsum slag cement early strength coagulant based on modified composite dehydration phase | |
| CN101948254A (en) | Method for preparing electrolytic manganese slag ecological cement | |
| CN108675657B (en) | Method for preparing silicate-sulphoaluminate composite system clinker by using waste residues | |
| CN101423355A (en) | Sulphoaluminates expansion agent prepared by industrial residue used in cement or concrete | |
| CN111875338B (en) | Sleeve grouting material for negative-temperature steel bar connection and preparation method thereof | |
| CN111635152A (en) | High belite sulphoaluminate cement clinker and preparation method thereof | |
| CN105129745B (en) | A kind of method that ardealite Sulphuric acid co-producing cement raw material integrate grinding | |
| CN103214226A (en) | Recycled concrete commercial mortar | |
| CN114276097A (en) | Nickel slag cementing material for improving activity of nickel slag through split-phase activation and preparation method thereof | |
| CN113582563A (en) | Active admixture and preparation method thereof | |
| CN114477803A (en) | Production method of carbide slag cement | |
| CN101863068B (en) | Method for producing autoclaved brick by residue of aluminum-extracted pulverized fuel ash | |
| CN114890699B (en) | Cementing material prepared from fluorogypsum and preparation method thereof | |
| CN115180844A (en) | Activated superfine fly ash doped cement and preparation method thereof | |
| CN111348849B (en) | Hydraulic lime and preparation method thereof | |
| CN115304296B (en) | Recyclable cement and preparation method thereof | |
| CN113582574B (en) | Additive prepared from iron tailings, carbide slag and steel slag as main raw materials and preparation method thereof | |
| CN116102281B (en) | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material | |
| CN111777352B (en) | Steel wind-quenching solid waste composite micro-powder superfine aggregate and application thereof in concrete | |
| CN114988729B (en) | Method for improving flexural strength of belite sulphoaluminate cement and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |