CN116078348A - Comprehensive utilization method of gas slag - Google Patents
Comprehensive utilization method of gas slag Download PDFInfo
- Publication number
- CN116078348A CN116078348A CN202111313546.9A CN202111313546A CN116078348A CN 116078348 A CN116078348 A CN 116078348A CN 202111313546 A CN202111313546 A CN 202111313546A CN 116078348 A CN116078348 A CN 116078348A
- Authority
- CN
- China
- Prior art keywords
- slag
- carbon
- carbon slag
- leaching
- solution
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 291
- 238000000034 method Methods 0.000 title claims abstract description 57
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 271
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 233
- 238000002386 leaching Methods 0.000 claims abstract description 125
- 239000002253 acid Substances 0.000 claims abstract description 69
- 238000001179 sorption measurement Methods 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 50
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000011148 porous material Substances 0.000 claims abstract description 15
- 239000012629 purifying agent Substances 0.000 claims abstract description 14
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 79
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 60
- 238000005188 flotation Methods 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 33
- 238000005470 impregnation Methods 0.000 claims description 32
- 230000001276 controlling effect Effects 0.000 claims description 27
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- 230000004913 activation Effects 0.000 claims description 16
- 238000002791 soaking Methods 0.000 claims description 13
- 230000003213 activating effect Effects 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000003350 kerosene Substances 0.000 claims description 12
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 12
- 230000002000 scavenging effect Effects 0.000 claims description 12
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 11
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 11
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 11
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000005642 Oleic acid Substances 0.000 claims description 11
- 229910010293 ceramic material Inorganic materials 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 11
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 11
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 11
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 claims description 10
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 9
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 claims description 9
- 235000020778 linoleic acid Nutrition 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 8
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 8
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 235000021110 pickles Nutrition 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 239000012459 cleaning agent Substances 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 230000029219 regulation of pH Effects 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 238000010979 pH adjustment Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 abstract description 11
- 239000010703 silicon Substances 0.000 abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011575 calcium Substances 0.000 abstract description 4
- 229910052791 calcium Inorganic materials 0.000 abstract description 4
- 229920000876 geopolymer Polymers 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 239000002808 molecular sieve Substances 0.000 abstract description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000003034 coal gas Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 71
- 239000002956 ash Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 16
- 239000003245 coal Substances 0.000 description 12
- 238000002309 gasification Methods 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 229960000907 methylthioninium chloride Drugs 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- -1 steam Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 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 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000009768 microwave sintering Methods 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a comprehensive utilization method of coal gas slag, which adopts a carbon ash separation process to obtain low carbon slag with the loss on ignition less than 5%, medium carbon slag with the loss on ignition of 20-50% and high carbon slag with the loss on ignition more than 80%; removing aluminum, iron and calcium metal elements in the low-carbon slag through acid leaching, and removing silicon elements in the low-carbon slag through alkaline leaching to obtain an aluminum-based water purifying agent and silicon-based water glass; the medium carbon slag is used as a raw material of porous materials, geopolymers, molecular sieves, microcrystalline glass or ceramsite; the high carbon slag is used for preparing carbon adsorption materials; the comprehensive utilization method disclosed by the invention has the advantages of simple process, mild reaction, no generation of secondary solid waste, large specific surface area of the prepared carbon adsorption material, high adsorption quantity, low medicament dosage, low operation cost and high carbon ash separation efficiency, and realizes separation of gasified slag carbon and other components.
Description
Technical Field
The invention belongs to the technical field of inorganic chemical industry solid waste resource utilization, and particularly relates to a comprehensive utilization method of coal gas slag.
Background
Coal gasification is one of the main ways to produce synthesis gas products, mainly including fixed bed gasification technology, fluidized bed gasification technology and entrained flow gasification technology, to convert solid coal into gaseous synthesis gas, while by-products such as steam, tar (individual gasification technology) and ash. Along with the great increase of the demand of the synthetic gas products, the byproduct inorganic ash is discharged and piled up in a large quantity, thereby causing serious environmental pollution.
Aiming at the physical characteristics of ash slag generated in the coal gasification process, CN106336164A discloses a preparation method of a heat-preservation baking-free brick, wherein gasified slag is taken as a raw material, coal gangue, steel slag and boiler slag are added into the gasified slag, and the baking-free brick is obtained after molding and curing; CN106467376a discloses a process for preparing baking-free bricks, which takes gasified slag as raw material, cement and bean gravel are added into the gasified slag, and the baking-free bricks are obtained after molding and curing.
In order to improve the added value of ash utilization, CN104774023A discloses a lightweight ceramsite prepared by using fly ash and gasified slag, a preparation method and application thereof, wherein the gasified slag and sodium/potassium feldspar are mixed according to a certain proportion, and then a small amount of auxiliary agent is added for molding, drying and sintering processes, so that the qualified lightweight ceramsite can be obtained; CN105130487a discloses a composition for producing filter ceramics, a preparation method and application thereof, fly ash and gasified slag are taken as raw materials, and grinding, molding and sintering are sequentially carried out, so that qualified filter ceramics can be obtained.
Based on the chemical composition characteristics of the gasified slag, CN106800416A discloses a method for preparing a low-creep refractory brick by utilizing gasified slag, which takes gasified slag, cordierite, zirconia-corundum, limestone, fly ash, feldspar and the like as raw materials, and adds auxiliary agents such as boron carbide fiber, nano tungsten oxide and the like, and the refractory material with high mechanical property, low creep property and good shock resistance is obtained through fine grinding, high-temperature microwave sintering, washing, drying and other working sections.
Based on the characteristic of high carbon content of the gasified slag, CN102980195A discloses a treatment method of the gasified slag of the coal chemical industry, which comprises the steps of uniformly mixing the gasified slag with coal slime, adding lime mud, and delivering the mixture to a fluidized bed boiler for combustion through a delivery pipeline, so that the utilization efficiency of carbon in the mixture is improved; CN108584971a discloses a method for preparing high-modulus soluble silicate by using gasified slag, and the method of acid leaching-alkali leaching is adopted to obtain the high-modulus soluble silicate, so that the quality is higher, the production cost is low, but the utilization of carbon components in gasified slag cannot be realized.
The gas slag contains rich elements such as carbon, aluminum, silicon, iron, calcium and the like, the existing method can not realize effective extraction and utilization, the comprehensive utilization rate is low, and the purpose of full component utilization of the gas slag can not be realized.
Therefore, a new comprehensive utilization method of the gas slag is needed to be provided, so that effective extraction and utilization are realized, and comprehensive utilization efficiency is provided.
Disclosure of Invention
The invention aims to provide a comprehensive utilization method of coal gasification slag, which adopts a carbon ash separation process to obtain low carbon slag with the ignition loss less than 5%, medium carbon slag with the ignition loss of 20-50% and high carbon slag with the ignition loss greater than 80%, aluminum, iron and calcium metal elements in the low carbon slag are removed by acid leaching, silicon elements in the low carbon slag are removed by alkali leaching, an aluminum-based water purifying agent and silicon-based water glass are obtained, the medium carbon slag is used as raw materials of porous materials, geopolymers, molecular sieves, microcrystalline glass or ceramsite, and the high carbon slag is used for preparing a carbon adsorption material.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the invention aims to provide a comprehensive utilization method of coal gas slag, which comprises the following steps:
(1) Carrying out carbon-ash separation on the gas slag to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
(2) Acid leaching is carried out on the low-carbon slag obtained in the step (1) to obtain acid leaching solution and acid leaching slag; performing alkaline leaching on the acid leaching slag to obtain second high-carbon slag and alkaline leaching liquid;
(3) Activating the first high-carbon slag in the step (1) and the second high-carbon slag in the step (2) to obtain a carbon adsorption material;
the first high carbon slag and the second high carbon slag are carbon slag with the loss on ignition being more than 80%, the medium carbon slag is carbon slag with the loss on ignition being 20-50%, and the low carbon slag is carbon slag with the loss on ignition being less than 5%.
The comprehensive utilization method of the coal gasification slag adopts a carbon ash separation process to obtain low carbon slag with the ignition loss less than 5%, medium carbon slag with the ignition loss of 20-50% and high carbon slag with the ignition loss greater than 80%, aluminum, iron and calcium metal elements in the low carbon slag are removed through acid leaching, silicon elements in the low carbon slag are removed through alkaline leaching to obtain an aluminum-based water purifying agent and silicon-based water glass, the medium carbon slag is used as a raw material of a porous material, a geopolymer, a molecular sieve, microcrystalline glass or ceramsite, and the high carbon slag is used for preparing a carbon adsorption material.
It is worth to say that 5% -20% of carbon slag and 50% -80% of carbon slag are not generated in the process of the carbon ash separation, and in practical application, if 5% -20% of carbon slag and 50% -80% of carbon slag are generated, the carbon ash separation is repeatedly performed until 5% -20% of carbon slag and 50% -80% of carbon slag are not generated.
As a preferred technical scheme of the invention, the carbon ash separation in the step (1) comprises classification, reselection and flotation which are sequentially carried out.
Preferably, the classifying apparatus comprises any one or a combination of at least two of a vibrating screen, a cyclone or a spiral classifier, including, typically but not limited to, a vibrating screen and a cyclone combination, a cyclone and a spiral classifier combination.
Preferably, the apparatus for reselection comprises a classifying cyclone and/or a spiral chute.
Preferably, the flotation apparatus comprises a flotation machine and/or a flotation column.
Preferably, during the flotation, the conditioning agent, collector and frother are added sequentially.
Preferably, the regulator comprises sodium hexametaphosphate and/or water glass.
Preferably, the amount of the regulator is 0.5-2kg/t, for example, 0.5kg/t,0.6kg/t,0.7kg/t,0.8kg/t,0.9kg/t,1kg/t,1.1kg/t,1.2kg/t,1.3kg/t,1.4kg/t,1.5kg/t,1.6kg/t,1.7kg/t,1.8kg/t,1.9kg/t,2kg/t, etc., but is not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the collector comprises a complex solution of oleic acid, linoleic acid and kerosene.
Preferably, the sum of the oleic acid and the linoleic acid in the compound solution is 5-50wt%, for example, 5wt%,10wt%,15wt%,20wt%,25wt%,30wt%,35wt%,40wt%,45wt%,50wt%, etc. but is not limited to the listed values, and other non-listed values in the above-mentioned value range are equally applicable.
Preferably, the kerosene content in the compound solution is 50-95wt%, for example, 50wt%,55wt%,60wt%,65wt%,70wt%,75wt%,80wt%,85wt%,90wt%,95wt%, etc., but not limited to the recited values, and other non-recited values within the above-mentioned range are equally applicable.
Preferably, the collector is used in an amount of 1 to 20kg/t, for example, 1kg/t,2kg/t,4kg/t,6kg/t,8kg/t,10kg/t,12kg/t,14kg/t,16kg/t,8kg/t,20kg/t, etc., but not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the foaming agent comprises methyl isobutyl carbinol.
Preferably, the amount of the foaming agent is 1 to 20kg/t, for example, 1kg/t,2kg/t,4kg/t,6kg/t,8kg/t,10kg/t,12kg/t,14kg/t,16kg/t,8kg/t,20kg/t, etc., but not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the flotation comprises roughing, refining and scavenging performed sequentially.
Preferably, the number of roughings is 1-2, for example 1 or 2.
Preferably, the number of beneficiation is 1-3, for example, 1,2 or 3.
Preferably, the number of times of the scavenging is 1 to 3, for example, 1 time, 2 times or 3 times.
As a preferable mode of the present invention, the concentration of the pickling solution used in the pickling in the step (2) is 3 to 10mol/L, for example, 3mol/L,3.5mol/L,4mol/L,4.5mol/L,5mol/L,5.5mol/L,6mol/L,6.5mol/L,7mol/L,7.5mol/L,8mol/L,8.5mol/L,9mol/L,9.5mol/L,10mol/L, etc., but not limited to the above-mentioned values, and other values not mentioned in the above-mentioned numerical ranges are equally applicable.
Preferably, the solute of the pickling solution comprises any one or a combination of at least two of hydrochloric acid, nitric acid or sulfuric acid, which typically but not limitatively comprises a combination of hydrochloric acid and nitric acid, a combination of hydrochloric acid and sulfuric acid, and a combination of nitric acid and sulfuric acid.
Preferably, the mass ratio of the pickle liquor to the low carbon slag is (2-8): 1, for example, 2:1,2.5:1,3:1,3.5:1,4:1,4.5:1,5:1,5.5:1,6:1,6.5:1,7:1,7.5:1,8:1, etc., but not limited to the recited values, other non-recited values within the above range are equally applicable.
Preferably, the temperature of the acid leaching in the step (2) is 20 to 100 ℃, for example, 20 ℃,30 ℃,40 ℃,50 ℃,60 ℃,0 ℃,80 ℃,90 ℃,100 ℃, etc., but the acid leaching is not limited to the listed values, and other values not listed in the above-mentioned numerical range are equally applicable.
Preferably, the acid leaching time in the step (2) is 30-200min, for example, 30min,50min,70min,90min,100min,120min,140min,160min,80min,200min, etc., but not limited to the recited values, and other non-recited values in the above range are equally applicable.
As a preferable technical scheme of the invention, the comprehensive utilization method further comprises the following steps: and (3) regulating and controlling the pH value of the acid leaching solution obtained in the step (2) to obtain the ferroalloy and the water purifying agent.
The acid leaching solution in the step (2) can be mixed with the medium carbon residue in the step (1) and used as a raw material of porous materials and/or ceramic materials.
Preferably, the agent used for pH regulation comprises any one or a combination of at least two of potassium hydroxide, sodium hydroxide, calcium aluminate or carbide slag.
Preferably, the end point pH of the pH control is 3 to 5, for example, 3,3.5,4,4.5,5, etc., but the end point pH is not limited to the listed values, and other non-listed values within the above-mentioned range are equally applicable.
In a preferred embodiment of the present invention, the concentration of the alkaline leaching solution used in the alkaline leaching in the step (2) is 0.5 to 5mol/L, and for example, may be 0.5mol/L,1mol/L,1.5mol/L,2mol/L,2.5mol/L,3mol/L,3.5mol/L,4mol/L,4.5mol/L,5mol/L, etc., but the present invention is not limited to the above-mentioned values, and other values not shown in the above-mentioned numerical ranges are equally applicable.
Preferably, the solute of the alkaline leaching solution comprises sodium hydroxide and/or potassium hydroxide.
Preferably, the alkaline leaching in the step (2) has a temperature of 60 to 180 ℃, for example, 60 ℃,70 ℃,80 ℃,90 ℃,100 ℃,110 ℃,120 ℃,130 ℃,140 ℃,150 ℃,160 ℃,170 ℃,180 ℃ and the like, but the alkaline leaching is not limited to the listed values, and other non-listed values within the above numerical range are equally applicable.
Preferably, the time of the alkaline leaching in the step (2) is 60-240min, for example, 60min,100min,120min,150min,180min,200min,220min,240min, etc., but not limited to the recited values, and other non-recited values in the above range are equally applicable.
Preferably, the stirring speed of the alkaline leaching in the step (2) is 200 to 500rpm, for example, 200rpm,230rpm,250rpm,280rpm,300rpm,330rpm,350rpm,370rpm,400rpm,420rpm,450rpm,480rpm,500rpm, etc., but not limited to the above-mentioned values, and other non-mentioned values within the above-mentioned range are applicable.
As a preferable technical scheme of the invention, the comprehensive utilization method further comprises the following steps: using the medium carbon residue in the step (1) as a raw material of a porous material and/or a ceramic material; and (3) using the alkali leaching solution in the step (2) as a raw material of water glass.
As a preferable technical scheme of the invention, the first high carbon residue and the second high carbon residue are sequentially mixed, impregnated and dried before the activation in the step (3).
Preferably, the first high carbon slag and the second high carbon slag are mixed to obtain high carbon slag.
The high-carbon slag can be activated to prepare a carbon adsorption material, and can be used as power coal.
Preferably, the primary impregnation liquid used for the primary impregnation comprises a potassium hydroxide solution.
The concentration of the primary impregnation liquid is preferably 3 to 5mol/L, and may be, for example, 3mol/L,3.2mol/L,3.4mol/L,3.6mol/L,3.8mol/L,4mol/L,4.2mol/L,4.4mol/L,4.6mol/L,4.8mol/L,5mol/L, etc., but not limited to the values recited above, and other values not recited in the above ranges are equally applicable.
Preferably, the mass ratio of the high carbon residue to the solute in the primary impregnation liquid is 1 (1-3), for example, 1:1,1:1.2,1:1.4,1:1.6,1:1.8,1:2,1:2.2,1:2.4,1:2.6,1:2.8,1:3, etc., but not limited to the recited values, and other non-recited values within the above range of values are equally applicable.
Preferably, the time of one impregnation is 1 to 3 hours, for example, 1 hour, 1.2 hours, 1.4 hours, 6 hours, 1.8 hours, 2 hours, 2.3 hours, 2.5 hours, 2.8 hours, 3 hours, etc., but not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the temperature of the primary impregnation is 20 to 30 ℃, for example, 20 ℃,21 ℃,22 ℃,23 ℃,24 ℃,25 ℃,26 ℃,27 ℃,28 ℃,29 ℃,30 ℃ and the like, but the primary impregnation is not limited to the listed values, and other non-listed values within the above-mentioned range are equally applicable.
Preferably, the temperature of the primary drying is 100-200 ℃, for example, 100 ℃,110 ℃,120 ℃,130 ℃,140 ℃,150 ℃,160 ℃,170 ℃,180 ℃,90 ℃,200 ℃, etc., but the primary drying is not limited to the listed values, and other non-listed values within the above-mentioned range are equally applicable.
Preferably, the time of the primary drying is 1-3h, for example, 1h,1.2h,1.4h, 6h,1.8h,2h,2.3h,2.5h,2.8h,3h, etc., but not limited to the recited values, and other non-recited values within the above range are equally applicable.
In a preferred embodiment of the present invention, the temperature of the activation in the step (3) is 600 to 900 ℃, for example, 600 ℃,620 ℃,650 ℃,680 ℃,700 ℃,730 ℃,750 ℃,780 ℃,800 ℃,820 ℃,850 ℃,880 ℃,900 ℃, etc., but the present invention is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned numerical ranges are equally applicable.
Preferably, the time of activation in step (3) is 0.5-3h, for example, 0.5h,1h,1.5h,2h,2.5h,3h, etc., but not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the activation of step (3) is performed under a nitrogen atmosphere.
Preferably, the flow rate of the nitrogen gas is 300-350mL/min, for example, 300mL/min,305mL/min,310mL/min,315mL/min,320mL/min,325mL/min,330mL/min,335mL/min,340mL/min,345mL/min,350mL/min, etc., but not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are equally applicable.
As a preferable technical scheme of the invention, the carbon adsorption material in the step (3) is subjected to secondary impregnation, cleaning, solid-liquid separation and secondary drying in sequence.
Preferably, the secondary impregnation liquid used for the secondary impregnation comprises a hydrochloric acid solution.
The solute content in the secondary impregnation liquid is preferably 5 to 20%, for example, 5%,6%,7%,8%,9%,10%,11%,12%,13%,14%,15%,16%,17%,18%,19%,20%, etc., but is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned numerical ranges are equally applicable.
Preferably, the mass ratio of the carbon adsorbing material to the secondary impregnation liquid is 1 (2-5), for example, 1:2,1:2.5,1:3,1:3.5,1:4,1:4.5,1:5, etc., but not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the time of the secondary impregnation is 5 to 24 hours, for example, 5 hours, 8 hours, 10 hours, 12 hours, 14 hours, 16 hours, 18 hours, 20 hours, 22 hours, 24 hours, etc., but the present invention is not limited to the recited values, and other non-recited values within the above range are equally applicable.
Preferably, the temperature of the secondary impregnation is 20 to 30 ℃, for example, 20 ℃,21 ℃,22 ℃,23 ℃,24 ℃,25 ℃,26 ℃,27 ℃,28 ℃,29 ℃,30 ℃ and the like, but the secondary impregnation is not limited to the listed values, and other non-listed values within the above-mentioned range are equally applicable.
Preferably, the cleaning agent used for the cleaning comprises pure water.
Preferably, the solid-liquid separation mode is suction filtration.
The secondary drying temperature is preferably 80 to 120 ℃, and may be, for example, 80 ℃,90 ℃,100 ℃,110 ℃,120 ℃, or the like, but is not limited to the values listed, and other values not listed in the above-mentioned value range are equally applicable.
Preferably, the secondary drying time is 4-6h, for example, 4h,4.2h,4.5h,4.8h,5h,5.3h,5.5h,5.8h,6h, etc., but not limited to the recited values, other non-recited values within the above range are equally applicable.
As a preferable technical scheme of the invention, the comprehensive utilization method comprises the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen, a cyclone or a spiral classifier; secondly, carrying out reselection in a separation cyclone or a spiral chute; thirdly, adding 0.5-2kg/t of regulator, 1-20kg/t of collector and 1-20kg/t of foaming agent into a flotation machine or a flotation column in sequence for flotation to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
wherein the regulator comprises sodium hexametaphosphate and/or sodium silicate; the collector comprises a compound solution of 5-50wt% of oleic acid and linoleic acid and 50-95wt% of kerosene; the foaming agent comprises methyl isobutyl carbinol; the flotation comprises 1-2 roughings, 1-3 carefully chosen and 1-3 scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a porous material and/or a ceramic material;
(2) Acid leaching the low-carbon slag obtained in the step (1) in 3-10mol/L of acid leaching solution at 20-100 ℃ for 30-200min, and controlling the mass ratio of the acid leaching solution to the low-carbon slag to be (2-8): 1 to obtain acid leaching solution and acid leaching slag; regulating the pH of the acid leaching solution to be 3-5 by using potassium hydroxide, sodium hydroxide, calcium aluminate or carbide slag to obtain ferroalloy and a water purifying agent; then, the acid leaching slag is subjected to alkaline leaching in alkaline leaching liquid with the concentration of 0.5-5mol/L at the temperature of 60-180 ℃ and the stirring rotation speed of 200-500rpm for 60-240min, so as to obtain second high carbon slag and alkaline leaching liquid; using the alkali leaching solution as a raw material of water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 3-5mol/L potassium hydroxide solution at 20-30 ℃ for 1-3h at one time, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1 (1-3); secondly, drying for 1-3 hours at 100-200 ℃; activating for 0.5-3 hours at 600-900 ℃ under the nitrogen atmosphere of 300-350mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 5-20% hydrochloric acid solution for 5-24 hours at 20-30 ℃ for the second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1 (2-5); then, cleaning by pure water, suction filtering, and drying for 4-6 hours at 80-120 ℃;
the first high carbon slag and the second high carbon slag are carbon slag with the loss on ignition being more than 80%, the medium carbon slag is carbon slag with the loss on ignition being 20-50%, and the low carbon slag is carbon slag with the loss on ignition being less than 5%.
The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.
Compared with the prior art, the invention has the following beneficial effects:
(1) The comprehensive utilization method of the coal gasification slag adopts a carbon-ash separation process, so that low carbon slag with the ignition loss less than 5%, medium carbon slag with the ignition loss of 20-50% and high carbon slag with the ignition loss greater than 80% are obtained, the high carbon slag is used for preparing a carbon adsorption material, the medium carbon slag is used as a raw material of a porous material, a geopolymer, a molecular sieve, microcrystalline glass or ceramsite, the separation of gasified slag carbon from other components is realized, the dosage of a medicament is less, the operation cost is low, and the carbon-ash separation efficiency is high;
(2) The comprehensive utilization method of the coal gasification slag firstly carries out carbon ash separation, prepares an aluminum-based water purifying agent, silicon-based water glass and a carbon-based adsorption material aiming at low carbon slag, has simple process, mild reaction, no secondary solid waste, and the prepared carbon-based adsorption material has large specific surface area and high adsorption quantity;
(3) The comprehensive utilization method of the gas slag can prepare various products which are not easily limited by market fluctuation of the products, adopts the technical collocation of high, medium and low-end utilization, on one hand, the medium and low-end building materials and materials can solve the difficult problem of large-scale treatment and utilization of the gas slag, on the other hand, the high-end products can realize economic benefit, and the cost input of preparing the medium and low-end materials is supplemented.
Drawings
FIG. 1 is a process flow diagram of the comprehensive utilization method of gas slag.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
As shown in fig. 1, the comprehensive utilization method of the present invention includes the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen, a cyclone or a spiral classifier; secondly, carrying out reselection in a separation cyclone or a spiral chute; thirdly, sequentially adding an adjusting agent, a collecting agent and a foaming agent into a flotation machine or a flotation column for flotation to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
wherein the regulator comprises sodium hexametaphosphate and/or sodium silicate; the collector comprises a compound solution of oleic acid and/or linoleic acid and kerosene; the foaming agent comprises methyl isobutyl carbinol; the flotation comprises roughing, selecting and scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a porous material and/or a ceramic material;
(2) Acid leaching the low-carbon slag obtained in the step (1) in acid leaching liquid to obtain acid leaching liquid and acid leaching slag; regulating and controlling the pH value of the acid leaching solution by using potassium hydroxide, sodium hydroxide, calcium aluminate or carbide slag to obtain ferroalloy and a water purifying agent; the acid leaching solution can also be mixed with the medium carbon residue in the step (1) and used as a raw material of porous materials and/or ceramic materials. Then, the acid leaching slag is subjected to alkaline leaching in alkaline leaching liquid to obtain second high carbon slag and alkaline leaching liquid; using the alkali leaching solution as a raw material of water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, and firstly, soaking the high carbon slag in potassium hydroxide solution for one time; secondly, drying; thirdly, activating to obtain a carbon adsorption material in a nitrogen atmosphere; secondly, soaking the carbon adsorption material in hydrochloric acid solution for the second time, and then cleaning with pure water, suction filtering and drying; the high carbon slag can also be used as power coal;
the first high carbon slag and the second high carbon slag are carbon slag with the loss on ignition being more than 80%, the medium carbon slag is carbon slag with the loss on ignition being 20-50%, and the low carbon slag is carbon slag with the loss on ignition being less than 5%.
Example 1
The embodiment provides a comprehensive utilization method of gas slag, which comprises the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen; secondly, reselecting in a spiral chute; thirdly, adding 0.5kg/t sodium hexametaphosphate, 10kg/t collector and 5kg/t methyl isobutyl carbinol into a flotation machine in sequence for flotation to obtain first high carbon slag, medium carbon slag and low carbon slag;
wherein the collector comprises a compound solution of 20wt% oleic acid and 80wt% kerosene; the flotation comprises 1 roughing, 2 fine selection and 1 scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a ceramic material;
(2) Acid leaching the low-carbon slag obtained in the step (1) in 4mol/L hydrochloric acid solution at 80 ℃ for 120min, and controlling the mass ratio of the hydrochloric acid solution to the low-carbon slag to be 3:1 to obtain acid leaching solution and acid leaching slag; regulating the pH value of the acid leaching solution to be 5 by using potassium hydroxide to obtain ferroalloy and a water purifying agent; then, the acid leaching slag is subjected to alkaline leaching in 0.5mol/L sodium hydroxide solution at 90 ℃ and at a stirring speed of 500rpm for 200min, so as to obtain second high carbon slag and alkaline leaching liquid; using the alkaline leaching solution as water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 3mol/L potassium hydroxide solution at 25 ℃ for 2 hours once, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1:1.5; secondly, drying for 2 hours at 160 ℃; thirdly, activating for 2 hours at 700 ℃ under the nitrogen atmosphere of 300mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 10% hydrochloric acid solution for 10 hours at 25 ℃ for the second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1:3; then, washing with pure water, suction filtering, and drying at 100 ℃ for 5 hours;
wherein the loss on ignition of the first high carbon slag is 80.97%, the loss on ignition of the second high carbon slag is 81.33%, the loss on ignition of the medium carbon slag is 31.07%, and the loss on ignition of the low carbon slag is 4.51%.
Example 2
The embodiment provides a comprehensive utilization method of gas slag, which comprises the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen; secondly, reselecting in a spiral chute; thirdly, sequentially adding 1kg/t sodium hexametaphosphate, 12kg/t collector and 7kg/t methyl isobutyl carbinol into a flotation machine for flotation to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
wherein the collector comprises a compound solution of 5wt% oleic acid and 95wt% kerosene; the flotation comprises 2 roughings, 1 carefully chosen and 3 scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a ceramic material;
(2) Acid leaching the low-carbon slag obtained in the step (1) in 3mol/L hydrochloric acid solution at 100 ℃ for 30min, and controlling the mass ratio of the hydrochloric acid solution to the low-carbon slag to be 2:1 to obtain acid leaching solution and acid leaching slag; regulating the pH value of the acid leaching solution to be 4 by using sodium hydroxide to obtain ferroalloy and a water purifying agent; then, the acid leaching slag is subjected to alkaline leaching in 5mol/L sodium hydroxide solution at 60 ℃ and a stirring rotation speed of 200rpm for 240min, so as to obtain second high carbon slag and alkaline leaching liquid; using the alkaline leaching solution as water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 4mol/L potassium hydroxide solution at 30 ℃ for 1h, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1:3; secondly, drying for 3 hours at 100 ℃; thirdly, activating for 3 hours at 600 ℃ under the nitrogen atmosphere of 325mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 20% hydrochloric acid solution for 5 hours at 30 ℃ for a second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1:2; then, washing with pure water, suction filtering, and drying at 120 ℃ for 4 hours;
wherein the loss on ignition of the first high carbon slag is 81.29%, the loss on ignition of the second high carbon slag is 80.86%, the loss on ignition of the medium carbon slag is 31.64%, and the loss on ignition of the low carbon slag is 3.25%.
Example 3
The embodiment provides a comprehensive utilization method of gas slag, which comprises the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen; secondly, carrying out reselection in a separation cyclone; thirdly, sequentially adding 2kg/t of water glass, 1kg/t of collector and 20kg/t of methyl isobutyl carbinol into a flotation machine for flotation to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
Wherein the collector comprises a compound solution of 30wt% linoleic acid and 70wt% kerosene; the foaming agent comprises; the flotation comprises 1 roughing, 3 fine selection and 2 scavenging which are sequentially carried out; using the medium carbon residue as a raw material of a porous material;
(2) Firstly, acid leaching the low-carbon slag obtained in the step (1) in 10mol/L sulfuric acid solution at 20 ℃ for 200min, and controlling the mass ratio of the sulfuric acid solution to the low-carbon slag to be 6:1 to obtain acid leaching solution and acid leaching slag; regulating the pH of the acid leaching solution to be 5 by using calcium aluminate to obtain ferroalloy and a water purifying agent; then, alkaline leaching the acid leaching slag in 3mol/L potassium hydroxide solution at 180 ℃ and a stirring speed of 200rpm for 60min to obtain second high carbon slag and alkaline leaching liquid; using the alkaline leaching solution as water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 5mol/L potassium hydroxide solution at 20 ℃ for 3 hours once, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1:1; secondly, drying at 200 ℃ for 1h; thirdly, activating for 0.5h at 900 ℃ under the nitrogen atmosphere of 350mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 5% hydrochloric acid solution for 24 hours at 20 ℃ for a second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1:5; then, washing with pure water, suction filtering, and drying at 80 ℃ for 6 hours;
Wherein the loss on ignition of the first high carbon slag is 80.88%, the loss on ignition of the second high carbon slag is 80.54%, the loss on ignition of the medium carbon slag is 25.66%, and the loss on ignition of the low carbon slag is 3.03%.
Example 4
The embodiment provides a comprehensive utilization method of gas slag, which comprises the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen; secondly, reselecting in a spiral chute; thirdly, adding 0.5kg/t water glass, 20kg/t collector and 1kg/t methyl isobutyl carbinol into a flotation machine in sequence for flotation to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
wherein the collector comprises a compound solution of 50wt% of oleic acid and linoleic acid and 50wt% of kerosene; the flotation comprises 1 roughing, 1 carefully selecting and 1 scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a ceramic material;
(2) Firstly, acid leaching the low-carbon slag obtained in the step (1) in a sulfuric acid solution with the concentration of 7mol/L at 50 ℃ for 100min, and controlling the mass ratio of the sulfuric acid solution to the low-carbon slag to be 8:1 to obtain acid leaching solution and acid leaching slag; regulating the pH value of the acid leaching solution to be 5 by using potassium hydroxide to obtain ferroalloy and a water purifying agent; then, the acid leaching slag is subjected to alkaline leaching in alkaline leaching liquid with the concentration of 2mol/L at the temperature of 140 ℃ and the stirring rotation speed of 300rpm for 120min, so as to obtain second high carbon slag and alkaline leaching liquid; using the alkaline leaching solution as water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 4mol/L potassium hydroxide solution at 20 ℃ for 3 hours once, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1:1; secondly, drying at 200 ℃ for 1h; thirdly, activating for 0.75h at 900 ℃ under the nitrogen atmosphere of 350mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 15% hydrochloric acid solution for 20 hours at 20 ℃ for a second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1:4; then, washing with pure water, suction filtering, and drying at 100 ℃ for 5 hours;
wherein the loss on ignition of the first high carbon slag is 82.30%, the loss on ignition of the second high carbon slag is 80.27%, the loss on ignition of the medium carbon slag is 41.90%, and the loss on ignition of the low carbon slag is 3.25%.
Example 5
The embodiment provides a comprehensive utilization method of the gas slag, which is different from the comprehensive utilization method of the gas slag described in the embodiment 1 only in that: the temperature of the activation in step (3) is replaced by 400 ℃ from 700 ℃.
Example 6
The embodiment provides a comprehensive utilization method of the gas slag, which is different from the comprehensive utilization method of the gas slag described in the embodiment 1 only in that: the temperature of the activation in step (3) is replaced by 1000 ℃ from 700 ℃.
Example 7
The embodiment provides a comprehensive utilization method of the gas slag, which is different from the comprehensive utilization method of the gas slag described in the embodiment 1 only in that: after the activation in the step (3), secondary soaking, cleaning, solid-liquid separation and secondary drying are not sequentially carried out; namely, the specific steps of the step (3) are as follows:
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 3mol/L potassium hydroxide solution at 25 ℃ for 2 hours once, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1:1.5; secondly, drying for 2 hours at 160 ℃; and activating for 2 hours at 700 ℃ under the nitrogen atmosphere of 300mL/min to obtain the carbon adsorption material.
Comparative example 1
The comparative example provides a comprehensive utilization method of the gas slag, and the comprehensive utilization method of the gas slag described in reference to the embodiment 1 is different only in that: no carbon ash separation was performed; namely, the comprehensive utilization method comprises the following steps:
(1) Firstly, carrying out acid leaching on the gas slag in 4mol/L hydrochloric acid solution at 80 ℃ for 120min, and controlling the mass ratio of the hydrochloric acid solution to the gas slag to be 3:1 to obtain acid leaching solution and acid leaching slag; regulating the pH value of the acid leaching solution to be 5 by using potassium hydroxide to obtain ferroalloy and a water purifying agent; then, the acid leaching slag is subjected to alkaline leaching in 0.5mol/L sodium hydroxide solution at 90 ℃ and at a stirring speed of 500rpm for 200min, so as to obtain alkaline leaching slag and alkaline leaching liquid; using the alkaline leaching solution as water glass;
(2) Firstly, soaking the alkaline leaching residue in 3mol/L potassium hydroxide solution for 2 hours at 25 ℃ once, and controlling the mass ratio of the alkaline leaching residue to potassium hydroxide in the potassium hydroxide solution to be 1:1.5; secondly, drying for 2 hours at 160 ℃; thirdly, activating for 2 hours at 700 ℃ under the nitrogen atmosphere of 300mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 10% hydrochloric acid solution for 10 hours at 25 ℃ for the second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1:3; then, pure water washing and suction filtration were performed, and then, the mixture was dried at 100℃for 5 hours.
Comparative example 2
The comparative example provides a comprehensive utilization method of the gas slag, and the comprehensive utilization method of the gas slag described in reference to the embodiment 1 is different only in that: acid leaching and alkaline leaching are not performed; namely, the comprehensive utilization method comprises the following steps:
the comprehensive utilization method comprises the following steps:
(1) Firstly, classifying the gas slag in a vibrating screen; secondly, reselecting in a spiral chute; thirdly, adding 0.5kg/t sodium hexametaphosphate, 10kg/t collector and 5kg/t methyl isobutyl carbinol into a flotation machine in sequence for flotation to obtain high carbon slag, medium carbon slag and low carbon slag;
wherein the collector comprises a compound solution of 20wt% oleic acid and 80wt% kerosene; the flotation comprises 1 roughing, 2 fine selection and 1 scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a porous material and/or a ceramic material; directly using the low carbon slag as a building material;
(2) Firstly, soaking the high carbon residue obtained in the step (1) in 3mol/L potassium hydroxide solution at 25 ℃ for 2 hours at one time, and controlling the mass ratio of the high carbon residue to potassium hydroxide in the potassium hydroxide solution to be 1:1.5; secondly, drying for 2 hours at 160 ℃; thirdly, activating for 2 hours at 700 ℃ under the nitrogen atmosphere of 300mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 10% hydrochloric acid solution for 10 hours at 25 ℃ for the second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1:3; then, washing with pure water, suction filtering, and drying at 100 ℃ for 5 hours;
wherein, the loss on ignition of the high carbon slag is 80.97%, the loss on ignition of the medium carbon slag is 31.07%, and the loss on ignition of the low carbon slag is 4.51%.
The specific surface areas of the carbon adsorbing materials obtained in the above examples and comparative examples were tested as follows: the test was performed by the BET specific surface area test method.
The results of the specific surface area test of the above examples and comparative examples are shown in Table 1.
(II) the adsorption amounts of the carbon adsorbing materials obtained in the above examples and comparative examples were measured as follows:
placing carbon adsorption material with mass of M into a reactor with volume of V and initial concentration of C 0 The concentration of the remaining methylene blue in the test solution was sampled at 1h of shaking on a shaker and was designated C i The adsorption quantity of the methylene blue can be obtained through calculation, namely the adsorption quantity of the methylene blue= (C) 0 -C i ) X V/M, wherein C 0 =2.5 g/L, v=0.05L and m=0.1 g.
The results of the test of the adsorption amounts of the above examples and comparative examples are shown in Table 1.
(III) the alkali leaching solutions obtained in the above examples and comparative examples were used as water glass, and the modulus of the water glass was measured as follows:
the silicon ion content and the sodium ion content in the water glass are measured by an inductively coupled plasma spectrometer (ICP) and are converted into silicon dioxide molar content and sodium oxide molar content, and the ratio of the silicon dioxide molar content to the sodium oxide molar content is the modulus of the water glass.
The modulus test results of the water glasses obtained in the above examples and comparative examples are shown in Table 1.
TABLE 1
| Project | Specific surface area/m 2 ·g -1 | Adsorption amount/mg.g -1 | Sodium silicate modulus |
| Example 1 | 1842 | 619 | 3.55 |
| Example 2 | 1585 | 611 | 3.51 |
| Example 3 | 1434 | 608 | 3.48 |
| Example 4 | 1717 | 615 | 3.52 |
| Example 5 | 429 | 303 | 3.55 |
| Example 6 | 433 | 308 | 3.55 |
| Example 7 | 468 | 316 | 3.55 |
| Comparative example 1 | 221 | 209 | 1.94 |
| Comparative example 2 | 1578 | 610 | / |
From table 1, the following points can be found:
(1) It can be seen from examples 1-4 that the comprehensive utilization method of the gas slag adopts a carbon ash separation process to prepare the carbon adsorption material and the silicon-based water glass, the obtained carbon adsorption material has large specific surface area and high adsorption quantity, and the obtained water glass has high modulus;
(2) Comparing example 1 with examples 5 and 6, it was found that the activation temperature in step (3) in example 5 was 400 ℃ and lower than the preferred 600-900 ℃ according to the invention, resulting in incomplete activation reaction, less voids and a significant decrease in specific surface area; since the activation temperature in step (3) of example 6 is 1000 ℃, which exceeds the preferred 600-900 ℃ of the invention, the temperature is too high to cause the micropores to collapse, and the specific surface area is reduced;
(3) Comparing example 1 with example 7, it was found that example 7 was not subjected to secondary impregnation, washing, solid-liquid separation and secondary drying in this order after the activation described in step (3); hydrochloric acid is used for secondary impregnation to perform impregnation, so that the effects of impurity removal and pore formation are achieved, and as the secondary impregnation is not performed after the activation of the embodiment 7, the pores of the carbon adsorption material are fewer, the specific surface area is reduced, and the adsorption quantity is reduced;
(4) Comparing example 1 with comparative example 1, it was found that since comparative example 1 did not undergo carbon ash separation, the loss on ignition of the residue generated after acid leaching and alkali leaching was only 50.53%, the recycling efficiency was low, the modulus of the obtained silica-based water glass was low, and the specific surface area of the obtained carbon adsorbent material was reduced to 221m 2 ·g -1 The adsorption quantity is reduced to 209 mg.g -1 ；
(5) Comparing example 1 with comparative example 2, it was found that the comparative example 2 was not acid-leached or alkali-leached, and thus could not be used as a resource, and thus could not obtain an iron alloy, an aluminum-based water purifier, and a silicon-based water glass.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (10)
1. The comprehensive utilization method of the gas slag is characterized by comprising the following steps of:
(1) Carrying out carbon-ash separation on the gas slag to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
(2) Acid leaching is carried out on the low-carbon slag obtained in the step (1) to obtain acid leaching solution and acid leaching slag; performing alkaline leaching on the acid leaching slag to obtain second high-carbon slag and alkaline leaching liquid;
(3) Activating the first high-carbon slag in the step (1) and the second high-carbon slag in the step (2) to obtain a carbon adsorption material;
the first high carbon slag and the second high carbon slag are carbon slag with the loss on ignition being more than 80%, the medium carbon slag is carbon slag with the loss on ignition being 20-50%, and the low carbon slag is carbon slag with the loss on ignition being less than 5%.
2. The integrated utilization process of claim 1, wherein the carbon ash separation of step (1) comprises classification, reselection and flotation performed in sequence;
preferably, the classifying device comprises any one or a combination of at least two of a vibrating screen, a cyclone or a spiral classifier;
preferably, the apparatus for reselection comprises a sorting cyclone and/or a spiral chute;
preferably, the flotation apparatus comprises a flotation machine and/or a flotation column;
preferably, during the flotation, a conditioning agent, a collector and a frother are added in sequence;
preferably, the regulator comprises sodium hexametaphosphate and/or water glass;
preferably, the amount of the regulator is 0.5-2kg/t;
preferably, the collector comprises a complex solution of oleic acid, linoleic acid and kerosene;
preferably, the sum of the content of oleic acid and linoleic acid in the compound solution is 5-50wt%;
preferably, the kerosene content in the compound solution is 50-95wt%;
preferably, the collector is used in an amount of 1-20kg/t;
preferably, the foaming agent comprises methyl isobutyl carbinol;
preferably, the amount of the foaming agent is 1-20kg/t;
preferably, the flotation comprises roughing, refining and scavenging performed sequentially;
Preferably, the number of roughings is 1-2;
preferably, the number of beneficiation is 1-3;
preferably, the number of times of scavenging is 1-3.
3. The comprehensive utilization method according to claim 1 or 2, wherein the concentration of the pickle liquor used in the acid leaching in the step (2) is 3-10mol/L;
preferably, the solute of the pickle liquor comprises any one or a combination of at least two of hydrochloric acid, nitric acid or sulfuric acid;
preferably, the mass ratio of the pickle liquor to the low carbon slag is (2-8): 1;
preferably, the temperature of the acid leaching in the step (2) is 20-100 ℃;
preferably, the acid leaching in the step (2) is carried out for 30-200min.
4. A comprehensive utilization method according to any one of claims 1-3, further comprising: regulating and controlling the pH value of the acid leaching solution obtained in the step (2) to obtain ferroalloy and a water purifying agent;
preferably, the reagent used for pH regulation comprises any one or a combination of at least two of potassium hydroxide, sodium hydroxide, calcium aluminate or carbide slag;
preferably, the end point pH of the pH adjustment is 3-5.
5. The comprehensive utilization method according to any one of claims 1 to 4, wherein the concentration of the alkaline leaching solution used in the alkaline leaching in the step (2) is 0.5 to 5mol/L;
Preferably, the solute of the alkaline leaching solution comprises sodium hydroxide and/or potassium hydroxide;
preferably, the alkaline leaching temperature in the step (2) is 60-180 ℃;
preferably, the alkaline leaching time in the step (2) is 60-240min;
preferably, the stirring speed of the alkaline leaching in the step (2) is 200-500rpm.
6. The comprehensive utilization method according to any one of claims 1 to 5, further comprising: using the medium carbon residue in the step (1) as a raw material of a porous material and/or a ceramic material; and (3) using the alkali leaching solution in the step (2) as a raw material of water glass.
7. The integrated utilization method according to any one of claims 1 to 6, wherein the first high carbon residue and the second high carbon residue are sequentially mixed, impregnated and dried before the activation in step (3);
preferably, the first high carbon slag and the second high carbon slag are mixed to obtain high carbon slag;
preferably, the primary impregnation liquid used for primary impregnation comprises potassium hydroxide solution;
preferably, the concentration of the primary impregnation liquid is 3-5mol/L;
preferably, the mass ratio of the high carbon slag to the solute in the primary impregnation liquid is 1 (1-3);
Preferably, the time of the one impregnation is 1-3 hours;
preferably, the temperature of the primary impregnation is 20-30 ℃;
preferably, the temperature of the primary drying is 100-200 ℃;
preferably, the time of the primary drying is 1-3 hours.
8. The integrated utilization process of any one of claims 1-7, wherein the temperature of activation in step (3) is 600-900 ℃;
preferably, the time of activation in step (3) is 0.5-3 hours;
preferably, the activation of step (3) is performed under a nitrogen atmosphere;
preferably, the flow rate of the nitrogen is 300-350mL/min.
9. The comprehensive utilization method according to any one of claims 1 to 8, wherein the carbon adsorbing material of step (3) is subjected to secondary impregnation, washing, solid-liquid separation and secondary drying in this order;
preferably, the secondary impregnation liquid used for the secondary impregnation comprises a hydrochloric acid solution;
preferably, the solute content in the secondary impregnation liquid is 5-20%;
preferably, the mass ratio of the carbon adsorption material to the secondary impregnation liquid is 1 (2-5);
preferably, the time of the secondary impregnation is 5-24 hours;
preferably, the temperature of the secondary impregnation is 20-30 ℃;
preferably, the cleaning agent used for cleaning comprises pure water;
Preferably, the solid-liquid separation mode is suction filtration;
preferably, the temperature of the secondary drying is 80-120 ℃;
preferably, the secondary drying time is 4-6 hours.
10. The comprehensive utilization method according to any one of claims 1 to 9, wherein the comprehensive utilization method comprises the steps of:
(1) Firstly, classifying the gas slag in a vibrating screen, a cyclone or a spiral classifier; secondly, carrying out reselection in a separation cyclone or a spiral chute; thirdly, adding 0.5-2kg/t of regulator, 1-20kg/t of collector and 1-20kg/t of foaming agent into a flotation machine or a flotation column in sequence for flotation to obtain first high-carbon slag, medium-carbon slag and low-carbon slag;
wherein the regulator comprises sodium hexametaphosphate and/or sodium silicate; the collector comprises a compound solution of 5-50wt% of oleic acid and linoleic acid and 50-95wt% of kerosene; the foaming agent comprises methyl isobutyl carbinol; the flotation comprises 1-2 roughings, 1-3 carefully chosen and 1-3 scavenging which are sequentially carried out; using the medium carbon slag as a raw material of a porous material and/or a ceramic material;
(2) Acid leaching the low-carbon slag obtained in the step (1) in 3-10mol/L of acid leaching solution at 20-100 ℃ for 30-200min, and controlling the mass ratio of the acid leaching solution to the low-carbon slag to be (2-8): 1 to obtain acid leaching solution and acid leaching slag; regulating the pH of the acid leaching solution to be 3-5 by using potassium hydroxide, sodium hydroxide, calcium aluminate or carbide slag to obtain ferroalloy and a water purifying agent; then, the acid leaching slag is subjected to alkaline leaching in alkaline leaching liquid with the concentration of 0.5-5mol/L at the temperature of 60-180 ℃ and the stirring rotation speed of 200-500rpm for 60-240min, so as to obtain second high carbon slag and alkaline leaching liquid; using the alkali leaching solution as a raw material of water glass;
(3) Mixing the first high carbon slag with the second high carbon slag to obtain high carbon slag, firstly, immersing the high carbon slag in 3-5mol/L potassium hydroxide solution at 20-30 ℃ for 1-3h at one time, and controlling the mass ratio of the high carbon slag to potassium hydroxide in the potassium hydroxide solution to be 1 (1-3); secondly, drying for 1-3 hours at 100-200 ℃; activating for 0.5-3 hours at 600-900 ℃ under the nitrogen atmosphere of 300-350mL/min to obtain a carbon adsorption material; secondly, soaking the carbon adsorption material in 5-20% hydrochloric acid solution for 5-24 hours at 20-30 ℃ for the second time, and controlling the mass ratio of the carbon adsorption material to the hydrochloric acid solution to be 1 (2-5); then, cleaning by pure water, suction filtering, and drying for 4-6 hours at 80-120 ℃;
the first high carbon slag and the second high carbon slag are carbon slag with the loss on ignition being more than 80%, the medium carbon slag is carbon slag with the loss on ignition being 20-50%, and the low carbon slag is carbon slag with the loss on ignition being less than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313546.9A CN116078348A (en) | 2021-11-08 | 2021-11-08 | Comprehensive utilization method of gas slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313546.9A CN116078348A (en) | 2021-11-08 | 2021-11-08 | Comprehensive utilization method of gas slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116078348A true CN116078348A (en) | 2023-05-09 |
Family
ID=86203105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111313546.9A Pending CN116078348A (en) | 2021-11-08 | 2021-11-08 | Comprehensive utilization method of gas slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116078348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117339552A (en) * | 2023-11-21 | 2024-01-05 | 陕西科技大学 | Gas-based residue adsorption-flocculation multifunctional water purifying agent and preparation method and application thereof |
| CN117510084A (en) * | 2023-11-09 | 2024-02-06 | 北京科立科盈科技有限公司 | Method for preparing basalt fiber by using gas slag |
| CN117548473A (en) * | 2023-12-20 | 2024-02-13 | 中国矿业大学(北京) | Stepped recycling and quality-classifying utilization method of coal gas slag |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101602620B1 (en) * | 2014-09-11 | 2016-03-11 | 경기대학교 산학협력단 | Manufacturing method of geopolymer having high strength by using coal gasification slag |
| CN107855104A (en) * | 2017-03-16 | 2018-03-30 | 吉林大学 | The thick slag of coal gasification prepares the method for complex mesoporous material and obtained mesoporous material |
| CN107857496A (en) * | 2017-03-15 | 2018-03-30 | 吉林大学 | A kind of method of comprehensive utilization of coal gasification fine slag |
| CN108584971A (en) * | 2018-05-04 | 2018-09-28 | 中国科学院过程工程研究所 | A method of preparing high mode soluble silicate using gasification slag |
| CN110586622A (en) * | 2019-09-24 | 2019-12-20 | 新疆天业（集团）有限公司 | Method for comprehensively utilizing gasification furnace slag resources |
| CN110976075A (en) * | 2019-12-20 | 2020-04-10 | 郑州大学 | Method for extracting carbon and reducing ash by coarse grain tailing discarding and fine grain flotation of gasified slag |
| CN113333436A (en) * | 2021-05-21 | 2021-09-03 | 中国矿业大学 | All-component comprehensive utilization method of coal gasification fine slag |
-
2021
- 2021-11-08 CN CN202111313546.9A patent/CN116078348A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101602620B1 (en) * | 2014-09-11 | 2016-03-11 | 경기대학교 산학협력단 | Manufacturing method of geopolymer having high strength by using coal gasification slag |
| CN107857496A (en) * | 2017-03-15 | 2018-03-30 | 吉林大学 | A kind of method of comprehensive utilization of coal gasification fine slag |
| CN107855104A (en) * | 2017-03-16 | 2018-03-30 | 吉林大学 | The thick slag of coal gasification prepares the method for complex mesoporous material and obtained mesoporous material |
| CN108584971A (en) * | 2018-05-04 | 2018-09-28 | 中国科学院过程工程研究所 | A method of preparing high mode soluble silicate using gasification slag |
| CN110586622A (en) * | 2019-09-24 | 2019-12-20 | 新疆天业（集团）有限公司 | Method for comprehensively utilizing gasification furnace slag resources |
| CN110976075A (en) * | 2019-12-20 | 2020-04-10 | 郑州大学 | Method for extracting carbon and reducing ash by coarse grain tailing discarding and fine grain flotation of gasified slag |
| CN113333436A (en) * | 2021-05-21 | 2021-09-03 | 中国矿业大学 | All-component comprehensive utilization method of coal gasification fine slag |
Non-Patent Citations (2)
| Title |
|---|
| JIANGSHAN QU ET AL.: "A high value utilization process for coal gasification slag: Preparation of high modulus sodium silicate by mechano-chemical synergistic activation", 《SCIENCE OF THE TOTAL ENVIRONMENT》, vol. 801, 19 August 2021 (2021-08-19), pages 1 - 9, XP086844200, DOI: 10.1016/j.scitotenv.2021.149761 * |
| 刘冬雪 等: "煤气化炉渣浮选及其精炭制备活性炭的研究", 《煤炭转化》, vol. 41, no. 5, 30 September 2018 (2018-09-30), pages 73 - 80 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117510084A (en) * | 2023-11-09 | 2024-02-06 | 北京科立科盈科技有限公司 | Method for preparing basalt fiber by using gas slag |
| CN117510084B (en) * | 2023-11-09 | 2024-05-28 | 北京科立科盈科技有限公司 | Method for preparing basalt fiber by using gas slag |
| CN117339552A (en) * | 2023-11-21 | 2024-01-05 | 陕西科技大学 | Gas-based residue adsorption-flocculation multifunctional water purifying agent and preparation method and application thereof |
| CN117548473A (en) * | 2023-12-20 | 2024-02-13 | 中国矿业大学(北京) | Stepped recycling and quality-classifying utilization method of coal gas slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116078348A (en) | Comprehensive utilization method of gas slag | |
| CN109179464B (en) | Method for efficiently, cleanly and recycling secondary aluminum ash | |
| CN107855104A (en) | The thick slag of coal gasification prepares the method for complex mesoporous material and obtained mesoporous material | |
| CN107855105A (en) | The method of porous beads and obtained porous beads are prepared using coal gasification fine slag | |
| CN110078393B (en) | Method for preparing calcium sulfosilicate-sulphoaluminate cement at low temperature | |
| CN106006688B (en) | A kind of method of calcification carbonation step method processing Bayer process red mud | |
| CN107857499B (en) | Prepare method, cement admixture and the cement composition of cement admixture | |
| CN101028935A (en) | Method for extracting aluminum hydrate or alumina from coal gangue and method for producing cement from fag end | |
| CN108622904A (en) | The method of mesoporous microballon and mesoporous microballon obtained are prepared using coal gasification fine slag | |
| CN103215441A (en) | Method for treating grate furnace garbage incineration flyash by using metallurgical sintering process | |
| CN107285774B (en) | Method for preparing mullite from white mud or fly ash and prepared mullite | |
| CN109485360A (en) | A kind of building moulding material produced using magnesium-smelting silicothermic process waste residue as raw material and its method | |
| CN115677248B (en) | Carbon-fixing lightweight aggregate and preparation method thereof | |
| CN114988913A (en) | CO (carbon monoxide) 2 Method for preparing high-strength building material by mineralization and application thereof | |
| CN114804668A (en) | Preparation method of activated carbon-fixing material for producing recycled aggregate | |
| CN116332535A (en) | Method for producing active micro powder by cooperatively treating manganese slag by using fluidized bed furnace | |
| CN113215394B (en) | Treatment method of stone coal | |
| CN111057810B (en) | Method for removing impurity iron in gasified slag | |
| CN103736440B (en) | A kind of method preparing activated silica adsorbing material for raw material with coal base solid waste | |
| CN115010388A (en) | Method for firing cement clinker by using mixed solid waste | |
| CN115108763A (en) | Carbonated coal gangue-based paste and preparation method and application thereof | |
| CN111320405B (en) | Solid hazardous waste base mineral admixture and preparation method thereof | |
| CN114832770A (en) | Method for preparing calcium-based circulating carbon capturing material by using steel slag | |
| CN114031319A (en) | Method for producing building gypsum powder from phosphogypsum | |
| CN112875736A (en) | Method for co-producing adsorption material and aluminum oxide by using tail coal |
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 |