CN112125538A - Calcium hydroxide production process and production line thereof - Google Patents
Calcium hydroxide production process and production line thereof Download PDFInfo
- Publication number
- CN112125538A CN112125538A CN202010952727.5A CN202010952727A CN112125538A CN 112125538 A CN112125538 A CN 112125538A CN 202010952727 A CN202010952727 A CN 202010952727A CN 112125538 A CN112125538 A CN 112125538A
- Authority
- CN
- China
- Prior art keywords
- calcium hydroxide
- cylinder
- inner cylinder
- outer cylinder
- sorting
- 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.)
- Pending
Links
Images
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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4663—Multi-layer screening surfaces
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
- C01F11/04—Oxides or hydroxides by thermal decomposition
- C01F11/06—Oxides or hydroxides by thermal decomposition of carbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
- C01F11/16—Purification
-
- 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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/045—After-treatment of slaked lime
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/08—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a vertical or steeply-inclined axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a calcium hydroxide production process, which comprises the following steps: s1 crushing, S2 calcining, S3 digesting, S4 filtering, S5 dehydrating, S6 drying and S7 sorting; the calcining furnace in the S2 adopts a gas-fired kiln, and the S6 and the S7 are completed by adopting a drying device which comprises: the inner cylinder is internally provided with a rotating shaft for driving the inner cylinder to rotate, a plurality of middle cylinders are arranged between the outer cylinder and the inner cylinder, and each middle cylinder is provided with a sieve pore for sequentially separating the outer cylinder and the inner cylinder into a filter residue layer and a plurality of separation layers from inside to outside; the bottom of the filter residue layer is provided with a cylinder bottom which can be opened and closed, the bottom of the sorting layer is provided with a material collecting groove, and the material collecting groove is arranged in a clearance with the outer cylinder and the middle cylinder; the waste gas generated by the gas burning kiln preheats the crushed material in the S and then leads to the inner cylinder.
Description
Technical Field
The invention relates to the technical field of calcium hydroxide production and processing, in particular to a calcium hydroxide production process and a calcium hydroxide production line.
Background
Calcium hydroxide is a white powdery solid with the chemical formula of Ca (OH)2 commonly known as hydrated lime and slaked lime, the aqueous solution is called as clear limewater, the calcium hydroxide has the general property of alkali and is strong alkali, the calcium hydroxide is binary strong alkali and can be dissolved in water, and the calcium hydroxide has wide application in industry.
At present, the existing production method of calcium hydroxide mainly takes lime as a raw material, calcines the lime to form calcium oxide, and then carries out crushing, digestion, filtration and dehydration to obtain the calcium hydroxide, but the calcining energy consumption is too high, the production rate is low, the prepared calcium hydroxide is not classified, further sorting is needed, and the working procedures are complicated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a calcium hydroxide production process and a production line thereof.
The invention solves the technical problems through the following technical means:
the production process of calcium hydroxide includes the following steps
S1 crushing
Crushing a limestone raw material to obtain a crushed material;
s2 calcination
Calcining the crushed material in the S1 in a calcining furnace to obtain crude calcium oxide;
s3 digestion
Placing the crude calcium oxide in the S2 into a digestion reactor for digestion reaction to obtain a calcium hydroxide turbid solution;
s4 filtration
Filtering the calcium hydroxide turbid liquid in the S3 to remove solid impurities to obtain a calcium hydroxide solution;
s5 dehydration
Dehydrating the calcium hydroxide solution in the S4 to obtain calcium hydroxide powder;
s6 drying
Drying the calcium hydroxide powder in S5;
s7 sorting
Sorting the dried calcium hydroxide powder in S6;
the calcining furnace in the S2 adopts a gas-fired kiln, and the S6 and the S7 are completed by adopting a drying device which comprises: the inner cylinder is internally provided with a rotating shaft for driving the inner cylinder to rotate, a plurality of middle cylinders are arranged between the outer cylinder and the inner cylinder, and each middle cylinder is provided with a sieve pore for sequentially separating the outer cylinder and the inner cylinder into a filter residue layer and a plurality of separation layers from inside to outside; the bottom of the filter residue layer is provided with a cylinder bottom which can be opened and closed, the bottom of the sorting layer is provided with a material collecting groove, and the material collecting groove is arranged in a clearance with the outer cylinder and the middle cylinder; the waste gas generated by the gas burning kiln preheats the crushed material in the S and then leads to the inner cylinder.
As an improvement of the technical scheme, the waste gas generated by the gas burning kiln is led to the inner cylinder from top to bottom.
As an improvement of the technical scheme, the bottom parts of the outer cylinder and the middle cylinder are provided with annular grooves for accommodating the material collecting groove.
As an improvement of the technical scheme, three middle cylinders are arranged, and the precision is respectively 200 meshes, 400 meshes and 600 meshes.
As an improvement of the technical scheme, the outer cylinder, the inner cylinder and the middle cylinder are in a shape of an inverted circular truncated cone, and the angle of the bottom angle is set to be 105-120 degrees.
A calcium hydroxide production line applies the calcium hydroxide production process and sequentially comprises a crusher, a calcinator, a digestion reactor, a filter dehydrator and a drying device, raw materials sequentially pass through the crusher, the calcinator, the digestion reactor, the filter dehydrator and the drying device, and waste gas generated in the calcinator sequentially passes through the crusher and the drying device.
The invention has the beneficial effects that: the method comprises the steps of sequentially carrying out S1 crushing, S2 calcining, S3 digestion, S4 filtering, S5 dehydration, S6 drying and S7 sorting on a limestone raw material to obtain finished calcium hydroxide powder with different fineness, crushing the raw material, improving the calcining efficiency, reducing the calcining time and improving the yield; and after calcination, digesting, separating solid calcium oxide from other solid impurities, filtering the impurities to obtain a relatively pure calcium hydroxide solution, dehydrating and drying the calcium hydroxide solution to obtain calcium hydroxide powder with the purity higher than that of the calcium hydroxide powder obtained by the common process, and performing separation to obtain the calcium hydroxide powder with different fineness.
Drawings
FIG. 1 is a schematic flow chart of a calcium hydroxide production process according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a drying apparatus according to an embodiment of the present invention;
the device comprises an outer cylinder 11, an inner cylinder 12, a rotating shaft 13, an intermediate cylinder 14, a filter residue layer 15, a sorting layer 16, a material collecting groove 17 and an annular groove 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
As shown in FIG. 1, the process for producing calcium hydroxide according to this embodiment comprises the following steps
S1 crushing
Crushing a limestone raw material to obtain a crushed material;
s2 calcination
Calcining the crushed material in the S1 in a calcining furnace to obtain crude calcium oxide;
s3 digestion
Placing the crude calcium oxide in the S2 into a digestion reactor for digestion reaction to obtain a calcium hydroxide turbid solution;
s4 filtration
Filtering the calcium hydroxide turbid liquid in the S3 to remove solid impurities to obtain a calcium hydroxide solution;
s5 dehydration
Dehydrating the calcium hydroxide solution in the S4 to obtain calcium hydroxide powder;
s6 drying
Drying the calcium hydroxide powder in S5;
s7 sorting
Sorting the dried calcium hydroxide powder in S6;
the calcining furnace in the S2 adopts a gas-fired kiln, and the S6 and the S7 are completed by adopting a drying device which comprises: the device comprises an outer cylinder 11 and an inner cylinder 12, wherein a rotating shaft 13 for driving the inner cylinder 12 to rotate is arranged in the inner cylinder 12, a plurality of middle cylinders 14 are arranged between the outer cylinder 11 and the inner cylinder 12, and sieve holes are formed in the middle cylinders 14 to sequentially divide the outer cylinder 11 and the inner cylinder 12 into a filter residue layer 15 and a plurality of sorting layers 16 from inside to outside; the bottom of the filter residue layer 15 is provided with a cylinder bottom which can be opened and closed, the bottom of the sorting layer 16 is provided with a material collecting groove 17, and the material collecting groove 17 is arranged in a clearance with the outer cylinder 11 and the middle cylinder 14; the waste gas generated by the gas-fired kiln preheats the crushed material in S1 and then flows to the inner cylinder 12.
The method comprises the steps of sequentially carrying out S1 crushing, S2 calcining, S3 digestion, S4 filtering, S5 dehydration, S6 drying and S7 sorting on a limestone raw material to obtain finished calcium hydroxide powder with different fineness, crushing the raw material, improving the calcining efficiency, reducing the calcining time and improving the yield; and after calcination, digesting, separating solid calcium oxide from other solid impurities, filtering the impurities to obtain a relatively pure calcium hydroxide solution, dehydrating and drying the calcium hydroxide solution to obtain calcium hydroxide powder with the purity higher than that of the calcium hydroxide powder obtained by the common process, and performing separation to obtain the calcium hydroxide powder with different fineness.
The drying device is used for simultaneously drying and sorting the calcium hydroxide powder, so that the working procedures are saved, the efficiency is improved, and the cost is reduced; the outer cylinder 11, the inner cylinder 12 and the middle cylinder 14 are driven to rotate by the rotating shaft 13, so that the calcium hydroxide powder in the filter residue layer 15 is close to the middle cylinder 14 under the action of centrifugal force, and the screening purpose is achieved through the sieve holes on the middle electric switch 14; the waste gas generated by the gas burning kiln preheats the crushed material in the S1, and then heats the filter residue layer 15 and the sorting layers 16 between the inner cylinder 12 and the outer cylinder 11 towards the inner cylinder 12, so that the calcium hydroxide powder is dried, the energy is saved, and the process is simplified.
The waste gas generated by the gas burning kiln is led to the inner barrel 12 from top to bottom; because the density of the hot air is less than that of the cold air, the waste gas with higher temperature is led to the inner barrel 12 from top to bottom, so that the heat utilization rate of the waste gas is high, and the phenomenon that the heat of the waste gas is not fully utilized due to the excessively high passing speed of the waste gas is avoided.
The bottom parts of the outer cylinder 11 and the middle cylinder 14 are provided with annular grooves 18 for accommodating the material collecting grooves 17; the solid between the filter residue layer 15 and the sorting layers 16 is prevented from mixing, so that the finished product is prevented from being too much in impurity or failing in sorting.
Three middle cylinders 14 are arranged, and the precision is respectively 200 meshes, 400 meshes and 600 meshes; the fineness is more than 200 meshes and impurities are intercepted in the filter residue layer 15, and then the finished product of the calcium hydroxide is classified into specifications of 200-mesh 400-mesh, 400-mesh 600-mesh and more than 600-mesh so as to adapt to different requirements.
The outer cylinder 11, the inner cylinder 12 and the middle cylinder 14 are in a shape of an inverted circular truncated cone, and the angle of a bottom angle is set to be 105-120 degrees; when the drying device rotates, the calcium hydroxide powder moves upwards to cover more areas of the middle cylinder 14, so that the filtering and sorting area is increased, and the filtering and sorting efficiency is improved.
Example 2
A calcium hydroxide production line applies the calcium hydroxide production process and sequentially comprises a crusher, a calcinator, a digestion reactor, a filter dehydrator and a drying device, raw materials sequentially pass through the crusher, the calcinator, the digestion reactor, the filter dehydrator and the drying device, and waste gas generated in the calcinator sequentially passes through the crusher and the drying device.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The production process of calcium hydroxide is characterized by comprising the following steps: comprises the following steps
S1 crushing
Crushing a limestone raw material to obtain a crushed material;
s2 calcination
Calcining the crushed material in the S1 in a calcining furnace to obtain crude calcium oxide;
s3 digestion
Placing the crude calcium oxide in the S2 into a digestion reactor for digestion reaction to obtain a calcium hydroxide turbid solution;
s4 filtration
Filtering the calcium hydroxide turbid liquid in the S3 to remove solid impurities to obtain a calcium hydroxide solution;
s5 dehydration
Dehydrating the calcium hydroxide solution in the S4 to obtain calcium hydroxide powder;
s6 drying
Drying the calcium hydroxide powder in S5;
s7 sorting
Sorting the dried calcium hydroxide powder in S6;
the calcining furnace in the S2 adopts a gas-fired kiln, and the S6 and the S7 are completed by adopting a drying device which comprises: the filter screen comprises an outer cylinder (11) and an inner cylinder (12), wherein a rotating shaft (13) for driving the inner cylinder (12) to rotate is arranged in the inner cylinder (12), a plurality of middle cylinders (14) are arranged between the outer cylinder (11) and the inner cylinder (12), and sieve holes are formed in the middle cylinders (14) and sequentially divide the outer cylinder (11) and the inner cylinder (12) into a filter residue layer (15) and a plurality of sorting layers (16) from inside to outside; the bottom of the filter residue layer (15) is provided with a cylinder bottom which can be opened and closed, the bottom of the sorting layer (16) is provided with a material collecting groove (17), and the material collecting groove (17) is arranged in a clearance way with the outer cylinder (11) and the middle cylinder (14); the waste gas generated by the gas burning kiln firstly preheats the crushed material in the S (1) and then leads to the inner cylinder (12).
2. The process for producing calcium hydroxide according to claim 1, characterized in that: the waste gas generated by the gas burning kiln is led to the inner barrel (12) from top to bottom.
3. The process for producing calcium hydroxide according to claim 1, characterized in that: and annular grooves (18) for accommodating the material collecting grooves (17) are formed at the bottoms of the outer cylinder (11) and the middle cylinder (14).
4. The process for producing calcium hydroxide according to claim 1, characterized in that: the number of the middle cylinders (14) is three, and the precision is 200 meshes, 400 meshes and 600 meshes respectively.
5. The process for producing calcium hydroxide according to claim 1, characterized in that: the outer cylinder (11), the inner cylinder (12) and the middle cylinder (14) are arranged in a shape of an inverted circular truncated cone, and the angle of a bottom angle is set to be 105-120 degrees.
6. A calcium hydroxide production line is characterized in that: the calcium hydroxide production process according to any one of claims 1 to 5, which comprises a crusher, a calciner, a digestion reactor, a filter dehydrator and a drying device in sequence, wherein the raw materials pass through the crusher, the calciner, the digestion reactor, the filter dehydrator and the drying device in sequence, and the exhaust gas generated in the calciner passes through the crusher and the drying device in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952727.5A CN112125538A (en) | 2020-09-11 | 2020-09-11 | Calcium hydroxide production process and production line thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952727.5A CN112125538A (en) | 2020-09-11 | 2020-09-11 | Calcium hydroxide production process and production line thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112125538A true CN112125538A (en) | 2020-12-25 |
Family
ID=73846350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010952727.5A Pending CN112125538A (en) | 2020-09-11 | 2020-09-11 | Calcium hydroxide production process and production line thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112125538A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720109A (en) * | 2021-08-09 | 2021-11-30 | 刘茂利 | Method for drying carbide slag by using calcium oxide |
| CN115043419A (en) * | 2022-01-06 | 2022-09-13 | 贵州长泰源纳米钙业科技有限公司 | Production process of novel calcium hydroxide blender |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058277A (en) * | 1983-09-09 | 1985-04-04 | キッコーマン株式会社 | Multi-stage classifier |
| CN101503207A (en) * | 2009-03-13 | 2009-08-12 | 杭州稳健钙业有限公司 | Process for producing calcium hydroxide special for plastic heat stabilizer |
| CN205667314U (en) * | 2016-04-26 | 2016-11-02 | 徐晶晶 | A kind of drying integrated equipment of the screening for Folium Camelliae sinensis |
| CN108480175A (en) * | 2018-04-02 | 2018-09-04 | 安徽理工大学 | A kind of roller sand sieving machine of hierarchical screening |
| CN109319814A (en) * | 2018-09-10 | 2019-02-12 | 南京艾峰科技有限公司 | A kind of nanometer grade calcium carbonate wet process prepares activation method |
| CN109809715A (en) * | 2019-03-15 | 2019-05-28 | 南京格暠环保科技有限公司 | The preparation method of high porosity calcium hydroxide |
-
2020
- 2020-09-11 CN CN202010952727.5A patent/CN112125538A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058277A (en) * | 1983-09-09 | 1985-04-04 | キッコーマン株式会社 | Multi-stage classifier |
| CN101503207A (en) * | 2009-03-13 | 2009-08-12 | 杭州稳健钙业有限公司 | Process for producing calcium hydroxide special for plastic heat stabilizer |
| CN205667314U (en) * | 2016-04-26 | 2016-11-02 | 徐晶晶 | A kind of drying integrated equipment of the screening for Folium Camelliae sinensis |
| CN108480175A (en) * | 2018-04-02 | 2018-09-04 | 安徽理工大学 | A kind of roller sand sieving machine of hierarchical screening |
| CN109319814A (en) * | 2018-09-10 | 2019-02-12 | 南京艾峰科技有限公司 | A kind of nanometer grade calcium carbonate wet process prepares activation method |
| CN109809715A (en) * | 2019-03-15 | 2019-05-28 | 南京格暠环保科技有限公司 | The preparation method of high porosity calcium hydroxide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720109A (en) * | 2021-08-09 | 2021-11-30 | 刘茂利 | Method for drying carbide slag by using calcium oxide |
| CN113720109B (en) * | 2021-08-09 | 2022-09-02 | 刘茂利 | Method for drying carbide slag by using calcium oxide |
| CN115043419A (en) * | 2022-01-06 | 2022-09-13 | 贵州长泰源纳米钙业科技有限公司 | Production process of novel calcium hydroxide blender |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106587116B (en) | A kind of method for extracting lithium carbonate and aluminium hydroxide using lepidolite and flyash | |
| CN112125538A (en) | Calcium hydroxide production process and production line thereof | |
| CN108793244B (en) | Method for preparing titanium dioxide by metatitanic acid double-section rotary kiln calcination | |
| AU2020103445A4 (en) | A Process to Extract Silica and Alumina Compounds in Coal Gangue Separately for Syntheses of a Series of Zeolite Products | |
| CN108439448B (en) | Natural alkali sodium bicarbonate mother liquor resource utilization system and treatment method thereof | |
| CN102583409A (en) | Method for producing mullite and calcium silicate by using high-alumina fly ash | |
| CN1296280C (en) | Method for producing alumina and cement by using coal ash and limestone | |
| CN112520769B (en) | Process and device for dealkalizing red mud and simultaneously recovering aluminum oxide by using waste flue gas and waste heat of cement plant | |
| CN102172598A (en) | Red mud slurrying multistage circulating dealkalization method | |
| CN102502722A (en) | Preparation method of high-purity magnesium oxide | |
| CN112142086A (en) | Preparation method of light calcium carbonate | |
| CN1408666A (en) | process for producing magnesium oxide from waste magnesite ore | |
| CN101746791A (en) | Dry sintering method for aluminum oxide clinker | |
| CN111333406A (en) | Refractory clay clinker prepared from coal slime tailing slag and preparation method thereof | |
| CN113234234B (en) | Method for preparing aluminum-based metal-organic framework material by using high-alumina fly ash | |
| CN109704382A (en) | A kind of preparation method of calcium carbonate crystal whisker | |
| CN101503207A (en) | Process for producing calcium hydroxide special for plastic heat stabilizer | |
| CN102757089A (en) | Technological method for improving metatitanic acid calcination efficiency | |
| CN103754905A (en) | Process for combined production of alumina as well as active calcium silicate and cement from gangue | |
| CN109761249B (en) | Method and system for resolving lithium in lithium-rich adsorbent of alumina plant | |
| CN113816424A (en) | Method for preparing chromate by utilizing oyster shells and tannery sludge | |
| CN114644463A (en) | Method for improving quality of calcium hydroxide | |
| RU2494965C1 (en) | Method of processing bauxites into alumina | |
| CN112811448A (en) | Recovery process of magnesium oxide reducing slag | |
| CN1408904A (en) | Process for producing high purity magnesium oxide monocrystal using waste magnesite ore |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201225 |