CN110606765A - Phosphogypsum ceramsite with good filling effect and preparation method thereof - Google Patents
Phosphogypsum ceramsite with good filling effect and preparation method thereof Download PDFInfo
- Publication number
- CN110606765A CN110606765A CN201910938178.3A CN201910938178A CN110606765A CN 110606765 A CN110606765 A CN 110606765A CN 201910938178 A CN201910938178 A CN 201910938178A CN 110606765 A CN110606765 A CN 110606765A
- Authority
- CN
- China
- Prior art keywords
- parts
- phosphogypsum
- clay
- ceramsite
- granules
- 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.)
- Withdrawn
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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/067—Macromolecular compounds
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses phosphogypsum ceramsite with good filling effect, which comprises the following raw materials in parts by weight: 30-60 parts of phosphogypsum, 5-10 parts of clay, 5-15 parts of calcium carbonate kaolin, 2-5 parts of shale and 2-8 parts of rubber seed powder; wherein, the clay is powder formed by mixing and grinding alumina sol according to the mass ratio of 1: 0.4-0.8; the inventor of the research verifies through experiments that the phosphogypsum, the clay, the calcium carbonate kaolin shale, the acorn powder and the clay are mixed and ground by adopting alumina sol, mixed and granulated, and fired into the ceramsite, wherein the bulk density of the ceramsite is 380-450 kg/m3, and the cylinder pressure strength of the ceramsite reaches 11.8-13 MPa.
Description
Technical Field
The invention relates to the technical field of filler ceramsite, in particular to phosphogypsum ceramsite with a good filler effect and a preparation method thereof.
Background
Phosphogypsum is a main solid waste in the phosphate fertilizer industry of China, and the main components of the phosphogypsum are dihydrate gypsum and hemihydrate gypsum. According to incomplete statistics, the annual total discharge amount of phosphogypsum in China exceeds 5500 ten thousand tons of dry basis, and the accumulated stockpiling amount is 2.5 hundred million tons. With the development of high-concentration phosphate fertilizers in China, the discharge amount of phosphogypsum is increased, so that the method not only causes serious environmental pollution, but also becomes a major problem for sustainable development of the phosphorus chemical industry. Therefore, the effective treatment of the phosphogypsum is not slow enough.
The ceramsite has rich pore structures and large specific surface area, and can be widely applied to the field of water treatment as a filter material.
However, the traditional ceramsite is prepared by firing clay and shale, and the clay and the shale are non-renewable natural resources, so that the preparation cost of the ceramsite is higher and higher; in recent years, with the rapid development of the phosphorus chemical industry, the stockpiling amount of the phosphogypsum is large, so that a reasonable way for effectively treating the phosphogypsum is needed to be found.
Although technical personnel make appropriate researches on preparing ceramsite by taking phosphogypsum as a raw material, the research technology for preparing ceramsite by taking phosphogypsum as a main raw material is relatively few, most of the ardealite is mixed with other waste residues, and the addition amount of the phosphogypsum is very small in the mixing process, so that the stockpiling amount of the phosphogypsum is difficult to relieve in the ceramsite preparation industry; in addition, due to the properties of the phosphogypsum, the phosphogypsum used as a main raw material for preparing the ceramsite has a plurality of problems, for example, excessive phosphogypsum easily causes the poor stacking density and cylinder pressure strength of the prepared ceramsite product, so that the service life of the ceramsite is shortened after the ceramsite is used as a filler in a sewage treatment process, and secondary pollution is easily caused to sewage discharge treatment.
In view of this, the researchers research the preparation of ceramsite by taking phosphogypsum as the main raw material, and the combination of the proportioning design of the raw material components and the treatment of the ceramsite preparation process makes the prepared ceramsite have better bulk density and cylinder pressure strength, and after the ceramsite is used as a filler, the ceramsite can effectively adsorb colored substances in sewage, thereby improving the treatment effect on the sewage, expanding the utilization amount of the phosphogypsum in the ceramsite product and providing a new way for the effective utilization of the phosphogypsum.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides phosphogypsum ceramsite used as a filler and a preparation method thereof.
The method is realized by the following technical scheme:
the phosphogypsum ceramsite with a good filling effect comprises the following raw materials in parts by weight: 30-60 parts of phosphogypsum, 5-10 parts of clay, 5-15 parts of calcium carbonate kaolin, 2-5 parts of shale and 2-8 parts of rubber seed powder; wherein, the clay is powder formed by mixing and grinding alumina sol according to the mass ratio of 1: 0.4-0.8.
Further, the clay comprises, by mass, 30-50 parts of silicon dioxide, 5-15 parts of aluminum oxide, 2-8 parts of ferric oxide, 3-9 parts of calcium oxide, 1-7 parts of magnesium oxide, 1-3 parts of potassium oxide and the balance of inevitable impurities; the clay is mixed with the alumina sol according to the mass ratio of 1: 0.5.
Further, during the grinding process, sodium silicate accounting for 2-6% of the mass of the aluminum sol and boron trioxide accounting for 0.3-1% of the mass of the aluminum sol are added.
Further, the phosphogypsum ceramsite with good filling effect and the preparation method thereof are characterized in that after the phosphogypsum is dried to constant weight, clay and shale are added for mixing and grinding, the mixture is sieved by a 100-mesh sieve, rubber seed powder is added, the mixture is stirred uniformly, water is added, the mass ratio of water to material is controlled to be 0.2-0.8, the mixture is sent into a granulator for granulation, and the mixture is sintered for 8-25min at the temperature of 1100-1500 ℃; and the firing is to send the granules in the granulator into a muffle furnace, preheat the granules to the temperature of 250 ℃, keep the temperature for 1min, heat the granules to 1100 ℃ for 1.5-4h, treat the granules for 3min at the constant temperature, heat the granules to 1400 ℃ for 15min at the constant temperature in 6min, and cool the granules to the normal temperature.
Compared with the prior art, the invention has the technical effects that:
the ardealite, the clay, the calcium carbonate kaolin, the shale and the acorn powder are reasonably proportioned to enable the raw material components to interact with each other, and the clay is combined to be subjected to mixing and grinding treatment by adopting alumina sol, so that the raw materials are mixed and granulated, the bonding performance can be effectively improved, and the barrel pressure strength is enhanced; in addition, in the adding process of the acorn powder and the alumina sol, the bulk density of the ceramsite can be reduced, the quality of the ceramsite can be improved, and the adsorption performance of the ceramsite can be enhanced, so that the ceramsite can be used as a filter layer filler for sewage treatment, the utilization efficiency of the ceramsite can be improved, and the effective treatment of the phosphogypsum can be realized.
The inventor of the research verifies through experiments that the phosphogypsum, the clay, the calcium carbonate kaolin shale, the acorn powder and the clay are mixed and ground by adopting alumina sol, mixed and granulated, and fired into the ceramsite, wherein the bulk density of the ceramsite is 380-450 kg/m3, and the cylinder pressure strength of the ceramsite reaches 11.8-13 MPa.
And the relative contents of silicon dioxide, aluminum oxide and other components are controlled by controlling the effective components of the clay, so that the cylinder pressure strength of the ceramsite is improved to some extent, relatively unlimited and increased by about 0.1-0.5 MPa. Meanwhile, the addition of sodium silicate and boron trioxide in the clay treatment process can also effectively improve the barrel pressure strength and the bulk density, and effectively improve the quality of the ceramsite.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
Example 1
The phosphogypsum ceramsite with a good filling effect comprises the following raw materials in parts by weight: 30 parts of phosphogypsum, 5 parts of clay, 5 parts of calcium carbonate kaolin, 2 parts of shale and 2 parts of acorn powder; wherein, the clay is powder formed by grinding after mixing alumina sol according to the mass ratio of 1: 0.4;
the clay comprises, by mass, 30 parts of silicon dioxide, 5 parts of aluminum oxide, 2 parts of ferric oxide, 3 parts of calcium oxide, 1 part of magnesium oxide, 1 part of potassium oxide and the balance of inevitable impurities; the clay is mixed with the alumina sol according to the mass ratio of 1: 0.5;
drying phosphogypsum to constant weight, adding clay and shale, mixing and grinding, sieving with a 100-mesh sieve, adding rubber seed powder, stirring uniformly, adding water, controlling the mass ratio of water to material to be 0.2, sending into a granulator, granulating, and firing at 1100 ℃ for 8min to obtain the phosphogypsum ceramsite with good filling effect; and the firing is to send the granules in the granulator into a muffle furnace, preheat the granules to the temperature of 250 ℃, keep the temperature for 1min, heat the granules to 1100 ℃ in 1.5h, treat the granules for 3min at the constant temperature, heat the granules to 1400 ℃ in 6min, treat the granules for 15min at the constant temperature, and cool the granules to the normal temperature.
Example 2
The phosphogypsum ceramsite with a good filling effect comprises the following raw materials in parts by weight: 45 parts of phosphogypsum, 8 parts of clay, 10 parts of calcium carbonate kaolin, 4 parts of shale and 5 parts of oak seed powder; wherein, the clay is powder formed by grinding after mixing alumina sol according to the mass ratio of 1: 0.6;
the clay comprises, by mass, 40 parts of silicon dioxide, 10 parts of aluminum oxide, 6 parts of ferric oxide, 7 parts of calcium oxide, 5 parts of magnesium oxide, 2 parts of potassium oxide and the balance of inevitable impurities; the clay is mixed with the alumina sol according to the mass ratio of 1: 0.5;
a phosphogypsum ceramsite with good filling effect and a preparation method thereof are disclosed, wherein phosphogypsum is dried to constant weight, then clay and shale are added for mixing and grinding, a 100-mesh sieve is passed, rubber seed powder is added, stirring is carried out uniformly, water is added, the mass ratio of water to material is controlled to be 0.6, the mixture is sent to a granulator for granulation, and firing is carried out for 20min at the temperature of 1300 ℃ to obtain the phosphogypsum ceramsite; and the firing is to send the granules in the granulator into a muffle furnace, preheat the granules to the temperature of 250 ℃, keep the temperature for 1min, heat the granules to 1100 ℃ for 3h, treat the granules for 3min at the constant temperature, heat the granules to 1400 ℃ for 15min in 6min, and cool the granules to the normal temperature.
Example 3
The phosphogypsum ceramsite with a good filling effect comprises the following raw materials in parts by weight: 60 parts of phosphogypsum, 10 parts of clay, 15 parts of calcium carbonate kaolin, 5 parts of shale and 8 parts of oak seed powder; wherein, the clay is powder formed by mixing and grinding alumina sol according to the mass ratio of 1: 0.8;
the clay comprises, by mass, 50 parts of silicon dioxide, 15 parts of aluminum oxide, 8 parts of ferric oxide, 9 parts of calcium oxide, 7 parts of magnesium oxide, 3 parts of potassium oxide and the balance of inevitable impurities; the clay is mixed with the alumina sol according to the mass ratio of 1: 0.5;
drying phosphogypsum to constant weight, adding clay and shale, mixing and grinding, sieving with a 100-mesh sieve, adding oak seed powder, stirring uniformly, adding water, controlling the mass ratio of water to material to be 0.8, sending into a granulator, granulating, and firing at 1500 ℃ for 25min to obtain the phosphogypsum ceramsite with good filling effect; and the firing is to send the granules in the granulator into a muffle furnace, preheat the granules to the temperature of 250 ℃, keep the temperature for 1min, heat the granules to 1100 ℃ for 1.5-4h, treat the granules for 3min at the constant temperature, heat the granules to 1400 ℃ for 15min at the constant temperature in 6min, and cool the granules to the normal temperature.
Claims (4)
1. The phosphogypsum ceramsite with a good filling effect is characterized by comprising the following raw materials in parts by weight: 30-60 parts of phosphogypsum, 5-10 parts of clay, 5-15 parts of calcium carbonate kaolin, 2-5 parts of shale and 2-8 parts of rubber seed powder; wherein, the clay is powder formed by mixing and grinding alumina sol according to the mass ratio of 1: 0.4-0.8.
2. The phosphogypsum ceramsite with a good filling effect as claimed in claim 1, wherein the clay comprises, by mass, 30-50 parts of silicon dioxide, 5-15 parts of aluminum oxide, 2-8 parts of ferric oxide, 3-9 parts of calcium oxide, 1-7 parts of magnesium oxide, 1-3 parts of potassium oxide, and the balance of inevitable impurities; the clay is mixed with the alumina sol according to the mass ratio of 1: 0.5.
3. The phosphogypsum ceramsite with good filling effect as claimed in claim 1, wherein during the grinding process, sodium silicate accounting for 2-6% of the mass of the alumina sol and boron trioxide accounting for 0.3-1% of the mass of the alumina sol are added.
4. The phosphogypsum ceramsite with good filling effect as claimed in any one of claims 1-3 and the preparation method thereof, characterized in that after the phosphogypsum is dried to constant weight, clay and shale are added for mixing and grinding, a 100-mesh sieve is passed, rubber seed powder is added, stirring is carried out uniformly, water is added, the mass ratio of water to material is controlled to be 0.2-0.8, the mixture is sent to a granulator for granulation, and the mixture is fired for 8-25min at the temperature of 1100-1500 ℃; and the firing is to send the granules in the granulator into a muffle furnace, preheat the granules to the temperature of 250 ℃, keep the temperature for 1min, heat the granules to 1100 ℃ for 1.5-4h, treat the granules for 3min at the constant temperature, heat the granules to 1400 ℃ for 15min at the constant temperature in 6min, and cool the granules to the normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938178.3A CN110606765A (en) | 2019-09-30 | 2019-09-30 | Phosphogypsum ceramsite with good filling effect and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938178.3A CN110606765A (en) | 2019-09-30 | 2019-09-30 | Phosphogypsum ceramsite with good filling effect and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110606765A true CN110606765A (en) | 2019-12-24 |
Family
ID=68894154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910938178.3A Withdrawn CN110606765A (en) | 2019-09-30 | 2019-09-30 | Phosphogypsum ceramsite with good filling effect and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110606765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI742547B (en) * | 2020-03-02 | 2021-10-11 | 明春窯業股份有限公司 | Method for manufacturing of high strength structural lightweight aggregates by an energy-saving and nitrogen-reducing rotary kiln |
-
2019
- 2019-09-30 CN CN201910938178.3A patent/CN110606765A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI742547B (en) * | 2020-03-02 | 2021-10-11 | 明春窯業股份有限公司 | Method for manufacturing of high strength structural lightweight aggregates by an energy-saving and nitrogen-reducing rotary kiln |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102126838B (en) | Method for preparing light building material ceramsites by using lithium extraction slag of lithium mica | |
| CN101186485A (en) | Sewage sludge shale ceramic particle and preparation method thereof | |
| CN105130220B (en) | With discarded concrete and the method for sludge eco-cement and active sand | |
| CN114230301A (en) | Phosphogypsum hardener and preparation method and application thereof | |
| CN109734344B (en) | Method for preparing cement retarder by using semi-hydrated phosphogypsum | |
| CN105130221B (en) | The method of comprehensive utilization discarded concrete and sludge system ecology clinker | |
| CN112794683B (en) | Waste concrete-based regenerated cementing material and preparation method thereof | |
| KR101787416B1 (en) | Artificial aggregates with self-hardening properties comprising mine powders with high specific gravity and fluidized-bed boiler ashes and Manufacturing method thereof | |
| CN111892340A (en) | Preparation method of low-cost steel slag carbonized brick | |
| CN110105081A (en) | Using golden tailing and vanadium ferrotianium tailing as the high strength light haydite of primary raw material | |
| CN111847956A (en) | Phosphogypsum-based cement retarder and preparation method and application thereof | |
| CN100396636C (en) | Method for preparing building gesso by ardealite | |
| CN101234858A (en) | Modification method for phosphogypsum and application thereof | |
| CN114940593A (en) | Lightweight aggregate, preparation method thereof and concrete containing lightweight aggregate | |
| CN105272340A (en) | Method of preparing siliceous and calcareous porous ceramsite and sulphuric acid by decomposing phosphogypsum | |
| CN110606765A (en) | Phosphogypsum ceramsite with good filling effect and preparation method thereof | |
| CN109650809A (en) | A kind of bored dross slag cement water-permeable brick of heat and preparation method thereof | |
| CN102731192A (en) | Humic acid compound fertilizer production process | |
| KR20130010994A (en) | Soil material using organic or inorganic sludge and manufacturing method thereof | |
| CN110590309A (en) | Pollution-free phosphogypsum ceramsite for landscaping and preparation method thereof | |
| CN116675454A (en) | High-strength ceramsite based on industrial solid waste and preparation method thereof | |
| CN101265043A (en) | Method for producing building gypsum from modified phosphorus gypsum | |
| CN107473763B (en) | Phosphogypsum ceramsite for sewage filtration and preparation method thereof | |
| CN110550927A (en) | Industrial waste gypsum mortar prepared by industrial tail gas synergy and toxicity solving method | |
| CN107445647B (en) | Phosphogypsum shale ceramsite and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191224 |