CN112744852A - Waste carbon silica brick recovery process - Google Patents
Waste carbon silica brick recovery process Download PDFInfo
- Publication number
- CN112744852A CN112744852A CN202110195165.9A CN202110195165A CN112744852A CN 112744852 A CN112744852 A CN 112744852A CN 202110195165 A CN202110195165 A CN 202110195165A CN 112744852 A CN112744852 A CN 112744852A
- Authority
- CN
- China
- Prior art keywords
- washing
- carbon silica
- silica brick
- filter cake
- filtrate
- 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.)
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 94
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000011449 brick Substances 0.000 title claims abstract description 47
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 47
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 47
- 239000002699 waste material Substances 0.000 title claims abstract description 22
- 238000011084 recovery Methods 0.000 title claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 62
- 239000000706 filtrate Substances 0.000 claims abstract description 29
- 239000012065 filter cake Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003513 alkali Substances 0.000 claims abstract description 19
- 239000000047 product Substances 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000005260 corrosion Methods 0.000 claims abstract description 14
- 230000007797 corrosion Effects 0.000 claims abstract description 14
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 12
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims abstract description 6
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 6
- 229910052731 fluorine Inorganic materials 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
-
- 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
- C01F11/20—Halides
- C01F11/22—Fluorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/037—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
- 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
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a waste carbon silica brick recovery process, which relates to the technical field of carbon silica brick recovery, and comprises the following steps: (1) reusing the non-corroded part of the waste carbon silica brick for manufacturing the carbon silica brick, and performing temporary coarse crushing and fine crushing on the corroded part to obtain carbon silica brick corrosion powder; (2) alkali washing the carbon silica brick corrosion powder by using alkali liquor, and filtering to obtain an alkali washing filter cake and an alkali washing filtrate; (3) washing the alkaline washing filter cake with water for a plurality of times, filtering to obtain a water washing filter cake and a water washing filtrate, drying and crushing the water washing filter cake to obtain a carbon-silicon powder product; (4) and (3) combining the alkaline washing filtrate and the water washing filtrate, slowly adding calcium hydroxide until no precipitate is generated, filtering the obtained filter cake, washing the filter cake for a plurality of times with water, and drying to obtain a calcium fluoride product.
Description
Technical Field
The invention relates to the technical field of carbon silica brick recovery, in particular to a waste carbon silica brick recovery process.
Background
The carbon silica brick is a special fire-resistant and corrosion-resistant building material, and along with the updating of modern buildings, the treatment of waste carbon silica bricks becomes a great problem. In the preparation process of the carbon silica brick, sodium fluosilicate is usually added to play a role of a mineralizer, different from oxygen, the acting force of fluorine and silicon in the sodium fluosilicate is stronger, fluorine is univalent, an oxygen bridge cannot be formed, the melting and crystallization temperatures of the silicon brick can be greatly reduced, and the performance of the silicon brick is greatly influenced, so that a large amount of fluorine is contained in the general carbon silica brick, and if the carbon silica brick is randomly treated, serious fluorine pollution can be caused.
Disclosure of Invention
The invention aims to provide a waste carbon silica brick recovery process, which aims to solve the technical problems of resource waste and serious fluorine pollution in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a waste carbon silica brick recovery process comprises the following steps:
(1) reusing the non-corroded part of the waste carbon silica brick for manufacturing the carbon silica brick, and performing temporary coarse crushing and fine crushing on the corroded part to obtain carbon silica brick corrosion powder;
(2) alkali washing the carbon silica brick corrosion powder by using alkali liquor, and filtering to obtain an alkali washing filter cake and an alkali washing filtrate;
(3) washing the alkaline washing filter cake with water for a plurality of times, filtering to obtain a water washing filter cake and a water washing filtrate, drying and crushing the water washing filter cake to obtain a carbon-silicon powder product;
(4) and (3) combining the alkaline washing filtrate and the water washing filtrate, slowly adding calcium hydroxide until no precipitate is generated, filtering the obtained filter cake, washing the filter cake for a plurality of times with water, and drying to obtain a calcium fluoride product, wherein the filtrate obtained in the step (2) is used for preparing alkaline washing alkali liquor.
Preferably, the thickness of the carbon silica brick corrosion powder is 100-400 meshes.
Preferably, the alkali solution used in step (2) is sodium hydroxide.
Preferably, the pH value of the alkaline washing liquid in the step (2) is 8-10.
Preferably, the filtrate obtained in step (4) is used for preparing alkaline washing alkali liquor in step (2) or precipitating calcium fluoride in the next batch, for example, calcium hydroxide is excessively added in step (4), and it should be noted that the filtrate obtained in step (4) cannot be used for preparing alkaline washing alkali liquor in step (2), but is used for producing calcium fluoride products in the next batch, otherwise, the yield of the calcium fluoride products in the next batch is influenced.
Compared with the prior art, the invention has the following beneficial effects:
1. the method has simple treatment steps and low treatment cost, can change waste into valuable, obtains three products of new carbon silica bricks, carbon silica powder products and calcium fluoride products, and effectively realizes resource recycling;
2. the invention effectively avoids the discharge of fluorine, greatly protects the environment and realizes green production.
Drawings
FIG. 1 is a flow chart of waste carbon silica brick recovery.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described below with reference to various embodiments, and the implementation manner of the present invention includes but is not limited to the following embodiments.
Example 1
As shown in fig. 1, the process diagram for recovering waste carbon silica bricks provided by the present invention comprises the following steps:
(1) reusing the non-corroded part of the waste carbon silica brick for manufacturing the carbon silica brick, and performing temporary coarse crushing and fine crushing on the corroded part to obtain carbon silica brick corrosion powder;
(2) 500g of carbon silica brick corrosion powder is subjected to alkaline washing by using a sodium hydroxide solution with the value of 1L, pH being 8-10, and an alkaline washing filter cake and an alkaline washing filtrate are obtained by filtering;
(3) washing the alkaline washing filter cake with water for 3 times, filtering to obtain a water washing filter cake and a water washing filtrate, drying and crushing the water washing filter cake to obtain 450g of carbon-silicon powder product;
(4) and (3) combining the alkaline washing filtrate and the water washing filtrate, slowly adding calcium hydroxide until no precipitate is generated, washing the filter cake obtained by filtering for 3 times, and drying to obtain 95g of calcium fluoride product, wherein the calcium content of the filtrate obtained in the step is detected to be lower than 0.05%, and the filtrate can be used for preparing alkaline washing alkali liquor in the step (2).
Example 2
The waste carbon silica brick recovery flow chart comprises the following steps:
(1) reusing the non-corroded part of the waste carbon silica brick for manufacturing the carbon silica brick, and performing temporary coarse crushing and fine crushing on the corroded part to obtain carbon silica brick corrosion powder;
(2) 500g of carbon silica brick corrosion powder is subjected to alkaline washing by using a sodium hydroxide solution with the value of 1L, pH being 8-10, and an alkaline washing filter cake and an alkaline washing filtrate are obtained by filtering;
(3) washing the alkaline washing filter cake with water for 3 times, filtering to obtain a water washing filter cake and a water washing filtrate, drying and crushing the water washing filter cake to obtain 445g of carbon silicon powder product;
(4) and (3) combining the alkaline washing filtrate and the water washing filtrate, slowly adding calcium hydroxide until no precipitate is generated, washing the filter cake obtained by filtering for 3 times, and drying to obtain 108g of calcium fluoride product, wherein the calcium content of the filtrate obtained in the step is detected to be 12%, and the filtrate can be used for calcium fluoride precipitation of the next batch.
Example 3
On the basis of example 2, the filtrate with the calcium content of 12% obtained in step (4) of example 2 is used for preparing alkali liquor, and the same amount of carbon silica brick corrosion powder in the same batch is treated, so that 480g of carbon silica powder product is prepared in step (3), and 65g of calcium fluoride product is prepared in step (4).
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (5)
1. The waste carbon silica brick recovery process is characterized by comprising the following steps:
reusing the non-corroded part of the waste carbon silica brick for manufacturing the carbon silica brick, and performing temporary coarse crushing and fine crushing on the corroded part to obtain carbon silica brick corrosion powder;
alkali washing the carbon silica brick corrosion powder by using alkali liquor, and filtering to obtain an alkali washing filter cake and an alkali washing filtrate;
washing the alkaline washing filter cake with water for a plurality of times, filtering to obtain a water washing filter cake and a water washing filtrate, drying and crushing the water washing filter cake to obtain a carbon-silicon powder product;
and (3) combining the alkaline washing filtrate and the water washing filtrate, slowly adding calcium hydroxide until no precipitate is generated, filtering the obtained filter cake, washing the filter cake for a plurality of times with water, and drying to obtain a calcium fluoride product.
2. The waste carbon silica brick recovery process according to claim 1, wherein the thickness specification of the carbon silica brick corrosion powder is 100-400 meshes.
3. The process for recycling waste carbon silica bricks according to claim 1, wherein the lye used in the step (2) is sodium hydroxide.
4. The waste carbon silica brick recovery process according to claim 3, wherein the pH value of the alkaline washing lye in the step (2) is 8-10.
5. The process for recycling waste carbon silica bricks according to claim 1, wherein the filtrate obtained in the step (4) is used for preparing alkaline washing alkali liquor or calcium fluoride precipitate in the next batch in the step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110195165.9A CN112744852A (en) | 2021-02-18 | 2021-02-18 | Waste carbon silica brick recovery process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110195165.9A CN112744852A (en) | 2021-02-18 | 2021-02-18 | Waste carbon silica brick recovery process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112744852A true CN112744852A (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110195165.9A Pending CN112744852A (en) | 2021-02-18 | 2021-02-18 | Waste carbon silica brick recovery process |
Country Status (1)
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52119614A (en) * | 1976-04-02 | 1977-10-07 | Hitachi Ltd | Basic refractory articles |
| US5939035A (en) * | 1994-10-13 | 1999-08-17 | The University Of Melbourne | Process for treating spent potlining containing inorganic matter |
| CN101988209A (en) * | 2010-12-03 | 2011-03-23 | 东北大学 | Method for treating discarded silicon carbide side wall material of aluminum electrolytic cell |
| CN105214275A (en) * | 2015-10-15 | 2016-01-06 | 郑州经纬科技实业有限公司 | The processing method of cyanide and fluoride in electrolytic aluminium waste slot liner |
| CN105923643A (en) * | 2016-04-12 | 2016-09-07 | 郑州鸿跃环保科技有限公司 | Method and system of recycling calcium fluoride from aluminium electrolysis cell overhaul slag |
| CN110015672A (en) * | 2019-05-24 | 2019-07-16 | 郑州大学 | Utilize the method for electrolytic cell waste material production magnesium fluoride |
| CN112981114A (en) * | 2021-02-18 | 2021-06-18 | 甘肃万众环保科技有限公司 | Nickel-containing waste battery and nickel-containing waste residue recovery process |
-
2021
- 2021-02-18 CN CN202110195165.9A patent/CN112744852A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52119614A (en) * | 1976-04-02 | 1977-10-07 | Hitachi Ltd | Basic refractory articles |
| US5939035A (en) * | 1994-10-13 | 1999-08-17 | The University Of Melbourne | Process for treating spent potlining containing inorganic matter |
| CN101988209A (en) * | 2010-12-03 | 2011-03-23 | 东北大学 | Method for treating discarded silicon carbide side wall material of aluminum electrolytic cell |
| CN105214275A (en) * | 2015-10-15 | 2016-01-06 | 郑州经纬科技实业有限公司 | The processing method of cyanide and fluoride in electrolytic aluminium waste slot liner |
| CN105923643A (en) * | 2016-04-12 | 2016-09-07 | 郑州鸿跃环保科技有限公司 | Method and system of recycling calcium fluoride from aluminium electrolysis cell overhaul slag |
| CN110015672A (en) * | 2019-05-24 | 2019-07-16 | 郑州大学 | Utilize the method for electrolytic cell waste material production magnesium fluoride |
| CN112981114A (en) * | 2021-02-18 | 2021-06-18 | 甘肃万众环保科技有限公司 | Nickel-containing waste battery and nickel-containing waste residue recovery process |
Non-Patent Citations (2)
| Title |
|---|
| PARK, JH ET AL.: ""Interfacial Reaction between Refractory Materials and Metallurgical Slags containing Fluoride"", 《STEEL RESEARCH INTERNATIONAL》 * |
| 张丹等: ""废耐火砖无害化处理技术研究"", 《甘肃冶金》 * |
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Application publication date: 20210504 |