CN113292353A - Method for preparing ceramsite by using nickel wet-process smelting slag - Google Patents
Method for preparing ceramsite by using nickel wet-process smelting slag Download PDFInfo
- Publication number
- CN113292353A CN113292353A CN202110494835.7A CN202110494835A CN113292353A CN 113292353 A CN113292353 A CN 113292353A CN 202110494835 A CN202110494835 A CN 202110494835A CN 113292353 A CN113292353 A CN 113292353A
- Authority
- CN
- China
- Prior art keywords
- nickel
- slag
- temperature
- ceramsite
- roasting
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 224
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 113
- 239000002893 slag Substances 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 93
- 238000003723 Smelting Methods 0.000 title claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000004321 preservation Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000008188 pellet Substances 0.000 claims 4
- 238000002386 leaching Methods 0.000 abstract description 12
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 10
- 239000002920 hazardous waste Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 231100000252 nontoxic Toxicity 0.000 abstract description 6
- 230000003000 nontoxic effect Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005245 sintering Methods 0.000 description 9
- 238000009854 hydrometallurgy Methods 0.000 description 6
- 231100000419 toxicity Toxicity 0.000 description 6
- 230000001988 toxicity Effects 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 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 3
- 239000004566 building material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 235000014413 iron hydroxide Nutrition 0.000 description 3
- 235000013980 iron oxide Nutrition 0.000 description 3
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 3
- 229910052604 silicate mineral Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 nickel cations Chemical class 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910003110 Mg K Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000011363 dried mixture Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- ZODDGFAZWTZOSI-UHFFFAOYSA-N nitric acid;sulfuric acid Chemical compound O[N+]([O-])=O.OS(O)(=O)=O ZODDGFAZWTZOSI-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000820 toxicity test Toxicity 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B33/1325—Hazardous waste other than combustion residues
- C04B33/1327—Hazardous waste other than combustion residues containing heavy metals
-
- 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
- C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for preparing ceramsite by using nickel wet-process smelting slag, which comprises the following steps: respectively drying and grinding the nickel slag and the shale, and mixing the nickel slag and the shale according to the mass ratio (1-5): (5-9) uniformly mixing to obtain a raw material; mixing raw materials and water according to a mass ratio of 1: (0.05-2) uniformly mixing, preparing balls, drying, and controlling the water content to be less than 5% to obtain a plurality of dried balls; and (3) after the preheating process and the high-temperature roasting process are sequentially carried out on the plurality of dry balls, naturally cooling the dry balls to obtain the ceramsite prepared from the nickel wet-process smelting slag. According to the invention, the shale is introduced, and the nickel wet-process smelting slag and the shale are roasted to obtain the non-toxic ceramsite which can be directly applied, so that the problem that the nickel wet-process smelting slag is difficult to treat is effectively solved, the heavy metal leaching risk of the nickel wet-process smelting slag is obviously reduced, and the effects of reutilization of hazardous waste, energy conservation and environmental protection are realized.
Description
Technical Field
The invention relates to the field of solid waste and hazardous waste treatment, in particular to a method for preparing ceramsite by using nickel wet-process smelting slag.
Background
The ceramsite is mainly used in the field of building materials, and most of the appearance characteristics of the ceramsite are round or oval spheres, but some of the ceramsite are irregular gravel. The shape of the porcelain granules varies with the process, and the manufacturing method mainly comprises a sintering expansion method and a sintering method. The preparation by the sintering expansion method refers to that components which generate gas in the sintering process are mixed in the raw materials, and the gas enables the raw materials heated to a glass state to expand, and the raw materials are generally produced by a rotary kiln. The sintering method refers to that the raw materials are solidified, melted and bonded at high temperature without expansion in the sintering process of the prepared blank particles, and the ceramic particles are prepared by adopting a mode of sintering water clinker in a cement vertical kiln.
The nickel slag is industrial solid waste discharged in the production process of nonferrous metal nickel and nickel-containing compounds, and the pyrometallurgical slag containing nickel and the hydrometallurgical slag containing nickel are divided according to the technological mode generated by the nickel slag. The pyrometallurgical slag of nickel is a solid slag product which is formed by sequentially passing metallic nickel and nickel-containing compounds through slag generated in a high-temperature smelting process and naturally or forcibly cooling the slag, and is commonly used for producing cement, mineral wool and the like. The wet smelting slag of nickel adopts a chemical method to extract sludge with high water content from soaked nickel ore or nickel-containing compound; because the nickel hydrometallurgy slag often contains high heavy metal and has high leaching toxicity, and the water content of the nickel hydrometallurgy slag is high, the nickel hydrometallurgy slag is difficult to utilize and is generally accumulated or solidified.
The long-term accumulation of the nickel hydrometallurgical slag can cause serious heavy metal pollution, and if the nickel hydrometallurgical slag is judged to be dangerous waste, the accumulation treatment mode of the nickel hydrometallurgical slag can cause great pollution to the environment. Regarding the solidification treatment mode of nickel slag, related records are only provided for nickel pyrometallurgical slag in the prior art, and the nickel hydrometallurgical slag has the characteristic that the nickel hydrometallurgical slag has larger difference with the nickel pyrometallurgical slag in components, particularly has higher water content, so that even after simple drying, the nickel hydrometallurgical slag is difficult to be blended and roasted with other materials to prepare a stable and non-toxic product which can be directly applied, and the nickel hydrometallurgical slag has higher leaching toxicity and is difficult to treat; in addition, no record related to the preparation of the building material ceramsite by using the nickel hydrometallurgy slag exists in the prior art. Therefore, an effective means for utilizing the nickel hydrometallurgical slag is needed.
Disclosure of Invention
The invention aims to provide a method for preparing ceramsite by using nickel wet-process smelting slag, which is used for solving the problem that an effective utilization method of the nickel wet-process smelting slag is lacked in the prior art.
In order to solve the technical problem, the invention provides a method for preparing ceramsite by using nickel wet-process smelting slag, which comprises the following steps of: respectively drying and grinding the nickel slag and the shale, and mixing the nickel slag and the shale according to the mass ratio (1-5): (5-9) uniformly mixing to obtain a raw material; mixing raw materials and water according to a mass ratio of 1: (0.05-2) uniformly mixing, preparing balls, drying, and controlling the water content to be less than 5% to obtain a plurality of dried balls; after sequentially carrying out a preheating process and a high-temperature roasting process on the plurality of dry balls, naturally cooling the dry balls to obtain ceramsite prepared from the nickel wet-process smelting slag; the process conditions of the high-temperature roasting process are as follows: raising the temperature to the roasting temperature at the heating rate of 1-5 ℃/min, and then carrying out heat preservation roasting, wherein the roasting temperature is 1000-1100 ℃, and the heat preservation roasting time is 5-60 min.
Wherein the nickel slag is nickel wet-process smelting slag, and the water content in the nickel slag is more than 20%.
Preferably, the process conditions of the high-temperature roasting process are as follows: heating to the roasting temperature at the heating rate of 2 ℃/min, and then carrying out heat preservation roasting, wherein the roasting temperature is 1100 ℃, and the heat preservation roasting time is 15 min.
Wherein, the process conditions of the preheating procedure are as follows: raising the temperature to a preheating temperature at a heating rate of 1-5 ℃/min, and then carrying out heat preservation and presintering, wherein the preheating temperature is 300-600 ℃, and the heat preservation and presintering time is 5-60 min.
In the preparation step of the raw material, the nickel slag and the shale are respectively dried to constant weight under the condition of 100-150 ℃ before being mixed, and then are crushed to 80-100 meshes.
Preferably, in the step of preparing the raw material, the nickel slag and the shale are dried respectively and then are mixed according to the mass ratio of 3:7, mixing uniformly.
Wherein in the preparation steps of the plurality of dry balls, the raw material and water are uniformly mixed to prepare the balls, the diameter of the prepared balls is 5-15 mm, and then the balls are dried at the temperature of 100-150 ℃ until the water content is less than 5%.
The invention has the beneficial effects that: different from the situation of the prior art, the invention provides the method for preparing the ceramsite by using the nickel wet-process smelting slag, and the nickel wet-process smelting slag and the shale are roasted under the specific condition by using the characteristics of the shale to obtain the non-toxic ceramsite which can be directly applied, so that the problem that the nickel wet-process smelting slag is difficult to treat is effectively solved, the heavy metal leaching risk of the nickel wet-process smelting slag is obviously reduced, and the effects of reutilization of hazardous waste, energy conservation and environmental protection are realized.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The method for preparing the ceramsite by using the nickel wet-process smelting slag comprises the following steps:
(1) respectively drying and grinding the nickel slag and the shale, and mixing the nickel slag and the shale according to the mass ratio (1-5): (5-9) uniformly mixing to obtain a raw material. In the step, specifically, the nickel slag and the shale are respectively dried to constant weight at 100-150 ℃ before being mixed, the dried mixture is introduced into a ball mill to ball mill the nickel slag and the shale to 80-100 meshes, and then the nickel slag and the shale are mixed according to the mass ratio of (1-5): (5-9) uniformly mixing to obtain a raw material; wherein the nickel slag is nickel wet-process smelting slag, the nickel slag has higher water content before simple drying treatment, usually more than 20%, and the preferable mixing ratio of the nickel slag and the shale after respective drying is 3: 7.
(2) Mixing raw materials and water according to a mass ratio of 1: (0.05-2) uniformly mixing, then preparing balls, drying and controlling the water content to be less than 5%, thus obtaining a plurality of dried balls. In the step, specifically, the raw material and water are mixed according to a mass ratio of 1: (0.05-2) uniformly mixing, preparing balls, wherein the diameter of the prepared balls is 5-15 mm, and then drying at 100-150 ℃ until the water content is less than 5%.
(3) And (3) after the preheating process and the high-temperature roasting process are sequentially carried out on the plurality of dry balls, naturally cooling the dry balls to obtain the ceramsite prepared from the nickel wet-process smelting slag. In this step, the process conditions of the preheating process are as follows: raising the temperature to a preheating temperature at a heating rate of 1-5 ℃/min, and then carrying out heat preservation and presintering, wherein the preheating temperature is 300-600 ℃, and the heat preservation and presintering time is 5-60 min; the process conditions of the high-temperature roasting process are as follows: raising the temperature to the roasting temperature at the heating rate of 1-5 ℃/min, and then carrying out heat preservation roasting, wherein the roasting temperature is 1000-1100 ℃, and the heat preservation roasting time is 5-60 min. Further, the preferred process conditions of the high-temperature roasting process are as follows: heating to the roasting temperature at the heating rate of 2 ℃/min, and then carrying out heat preservation roasting, wherein the roasting temperature is 1100 ℃, and the heat preservation roasting time is 15 min. In the step, an electric heating furnace of 3000 w-10000 w is adopted to perform the preheating process and the high-temperature roasting process, and in other embodiments, an appropriate high-temperature roasting device can be selected according to actual requirements, which is not limited herein.
The method for preparing the ceramsite by using the nickel wet-process smelting slag and the advantages are explained in the following steps:
1) the nickel slag adopted by the invention is nickel wet-process smelting slag, and the fluxing elements such as iron, calcium, sodium and the like in the nickel slag are higher, and calcium sulfate is taken as the main component; the contents of silicon and aluminum elements in the shale are higher, and aluminosilicate minerals are taken as main components. In the process of roasting the ceramsite, the silicon dioxide and the aluminum oxide in the shale can form mullite with a strength supporting effect, so that the whole ceramsite has better particle strength. The gypsum component in the nickel slag is decomposed at high temperature to generate calcium oxide which plays a role of fluxing together with iron oxide and iron hydroxide; and the gypsum, the iron oxide and the iron hydroxide in the nickel slag are combined with silicate during roasting, so that complex silicate substances are generated under the low-temperature condition, and the nickel slag and the shale can be well roasted and combined. The ceramsite prepared after roasting also comprises alkali metal oxides such as sodium oxide and potassium oxide, which are mainly from sodium and potassium in nickel slag, and in the roasting process, the sodium and potassium components are combined with shale, iron oxides in the nickel slag, iron hydroxides and the like to form a large amount of liquid phase for vitrification reaction, so that the fixation of heavy metals such as Ni, Pb and the like in the nickel slag is facilitated, the leaching toxicity of the prepared ceramsite is obviously reduced, and hazardous wastes are converted into non-toxic ceramsite products.
2) The nickel wet smelting slag belongs to HW46 hazardous waste, specific harmful metal ions are judged to be nickel cations, the content generally accounts for a few thousandths to a few percent, and the nickel cations react with silicate minerals at high temperature, so that original high-valence harmful heavy metal ions become harmless low-valence ions or even molecules and react with the silicate minerals to form new silicate minerals, and the harmful heavy metal ions can be well fixed.
3) The prepared ceramsite product can be directly used as a basic building material to be added and applied, and the nickel wet smelting slag which is difficult to treat is well recycled, so that the effects of energy conservation and environmental protection are achieved.
The application effect of the method for preparing ceramsite by using nickel hydrometallurgy slag is explained by using specific examples, and the specific experimental steps are as follows.
The nickel hydrometallurgy slag and the shale are selected to be respectively subjected to chemical component content tests, as shown in table 1, the component data in table 1 are mass percent, and the nickel slag has high water content.
TABLE 1 chemical composition content of Nickel slag and shale
| Ca | Fe | Mg | K | Na | Al | Ni | Si | S | Water content ratio | |
| Nickel slag | 10.03 | 13.36 | 0.92 | 0.029 | 1.3 | 1.11 | 0.12 | 2.12 | 8.99 | 20～40 |
| Shale | 2.76 | 3.09 | 0.99 | 0.58 | 0.0049 | 2.48 | 0.0013 | 26.55 | 0.0081 | 8～15 |
Based on the method steps for preparing the ceramsite by using the nickel wet-process smelting slag, five process parameters of the nickel slag mixing amount, the roasting temperature, the roasting time, the pre-sintering temperature and the pre-sintering time in the process steps are selected as experiment parameters, and an orthogonal experiment is established, as shown in table 2. Wherein the mixing amount of the nickel slag is the mass percent of the nickel slag in the raw material, and the specific values comprise 10%, 20%, 30% and 40%; the roasting temperature specifically takes 1000 ℃, 1100 ℃, 1200 ℃ and 1300 ℃; the roasting time specifically takes 5min, 15min, 30min and 60 min; the specific values of the presintering temperature include 300 ℃, 400 ℃, 500 ℃ and 600 ℃; the pre-burning time specifically takes values of 5min, 15min, 30min and 60 min.
TABLE 2 comparison table of ceramsite properties under different experimental parameter conditions
Firstly, through orthogonal experiments, the fact that when the nickel slag doping amount is 40%, the ceramsite sample starts to have obvious cracks, so that the nickel slag doping amount is not easy to be too high, and when the nickel slag doping amount is 10%, the nickel slag doping amount is small, and the effect of treating the nickel slag as much as possible cannot be achieved, and from the experiments, the nickel slag doping amount is preferably selected to be 20% -30%.
Secondly, it can be found from the appearance of the baked ceramsite in table 2 that when the baking temperature reaches 1200 ℃ and 1300 ℃, the adjacent ceramsite will be bonded, which means that the baking temperature cannot be too high, preferably 1000 ℃ and 1100 ℃.
Thirdly, on the basis of eliminating the above adverse conditions, it can be seen from the comparison between the particle strength and the water absorption rate in table 2 that the particle strength of the ceramsite prepared under the condition of the experimental group 10 is the highest, and the water absorption rate of the ceramsite prepared under the condition of the experimental group 6 is the highest, so that the proper preparation conditions can be selected according to different ceramsite performance requirements.
Taking the implementation group 10 as an example, respectively adopting a sulfuric acid-nitric acid method and an acetic acid method to test the leaching toxicity of the raw material nickel slag and the roasted ceramsite, as shown in table 3, wherein an item with the leaching concentration far less than the leaching toxicity standard concentration is denoted as ND; as can be seen from Table 3, the leaching concentration of the heavy metals in the prepared ceramsite is remarkably reduced compared with that of the nickel slag and is lower than the hazardous waste leaching toxicity standard, so that the method for preparing the ceramsite by using the nickel wet smelting slag can effectively fix the heavy metals in the nickel slag and convert the toxic nickel slag into a nontoxic ceramsite product.
TABLE 3 comparative table of leaching toxicity test of nickel slag and ceramsite
Different from the situation of the prior art, the invention provides the method for preparing the ceramsite by using the nickel wet-process smelting slag, and the nickel wet-process smelting slag and the shale are roasted under the specific condition by using the characteristics of the shale to obtain the non-toxic ceramsite which can be directly applied, so that the problem that the nickel wet-process smelting slag is difficult to treat is effectively solved, the heavy metal leaching risk of the nickel wet-process smelting slag is obviously reduced, and the effects of reutilization of hazardous waste, energy conservation and environmental protection are realized.
It should be noted that the above embodiments belong to the same inventive concept, and the description of each embodiment has a different emphasis, and reference may be made to the description in other embodiments where the description in individual embodiments is not detailed.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A method for preparing ceramsite by using nickel wet-process smelting slag is characterized by comprising the following steps:
respectively drying and grinding the nickel slag and the shale, and mixing the nickel slag and the shale according to the mass ratio (1-5): (5-9) uniformly mixing to obtain a raw material;
mixing the raw material and water according to a mass ratio of 1: (0.05-2) uniformly mixing, preparing balls, drying, and controlling the water content to be less than 5% to obtain a plurality of dried balls;
the plurality of dry balls are naturally cooled after being sequentially subjected to a preheating process and a high-temperature roasting process, so that ceramsite prepared from the nickel wet-process smelting slag is obtained;
the process conditions of the high-temperature roasting process are as follows: raising the temperature to the roasting temperature at the heating rate of 1-5 ℃/min, and then carrying out heat preservation roasting, wherein the roasting temperature is 1000-1100 ℃, and the heat preservation roasting time is 5-60 min.
2. The method for preparing ceramsite according to claim 1, wherein the nickel slag is nickel hydrometallurgical slag, and the moisture content of the nickel slag is greater than 20%.
3. The method for preparing ceramsite by using nickel hydrometallurgical slag according to claim 1, wherein the high-temperature roasting process comprises the following process conditions: heating to a roasting temperature at a heating rate of 2 ℃/min, and then carrying out heat preservation roasting, wherein the roasting temperature is 1100 ℃, and the heat preservation roasting time is 15 min.
4. The method for preparing ceramsite by using nickel hydrometallurgical slag according to claim 1, wherein the preheating process comprises the following process conditions: raising the temperature to a preheating temperature at a heating rate of 1-5 ℃/min, and then carrying out heat preservation and presintering, wherein the preheating temperature is 300-600 ℃, and the heat preservation and presintering time is 5-60 min.
5. The method for preparing ceramsite according to claim 1, wherein in the step of preparing the raw material, the nickel slag and the shale are respectively dried to constant weight at 100-150 ℃ before being mixed, and then crushed to 80-100 meshes.
6. The method for preparing ceramsite according to claim 5, wherein in the step of preparing raw materials, the nickel slag and the shale are dried respectively and then mixed according to a mass ratio of 3:7, mixing uniformly.
7. The method for preparing ceramsite according to claim 1, wherein the step of preparing the dry pellets comprises uniformly mixing the raw material with water to prepare pellets, wherein the diameter of the prepared pellets is 5-15 mm, and drying the pellets at 100-150 ℃ until the water content is less than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110494835.7A CN113292353A (en) | 2021-05-07 | 2021-05-07 | Method for preparing ceramsite by using nickel wet-process smelting slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110494835.7A CN113292353A (en) | 2021-05-07 | 2021-05-07 | Method for preparing ceramsite by using nickel wet-process smelting slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113292353A true CN113292353A (en) | 2021-08-24 |
Family
ID=77320985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110494835.7A Pending CN113292353A (en) | 2021-05-07 | 2021-05-07 | Method for preparing ceramsite by using nickel wet-process smelting slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113292353A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636826A (en) * | 2021-09-03 | 2021-11-12 | 荆门绿源环保产业发展有限公司 | Method for preparing environment-friendly brick by using nickel wet-process smelting slag and water-quenched slag |
| CN116003102A (en) * | 2022-12-02 | 2023-04-25 | 浙江省生态环境科学设计研究院 | Method for preparing sintered brick by using heavy metal contaminated soil |
| WO2024198237A1 (en) * | 2023-03-30 | 2024-10-03 | 浙江华友钴业股份有限公司 | Method for preparing sintered brick from lateritic nickel ore high-pressure acid leaching smelting tailings, and sintered brick |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102786239A (en) * | 2012-07-30 | 2012-11-21 | 中国铝业股份有限公司 | Method for producing cement with nickel furnace slag |
| CN103112963A (en) * | 2013-01-15 | 2013-05-22 | 昆明理工大学 | Acidolysis laterite nickel ore wastewater treatment and slag utilization method |
| CN105669163A (en) * | 2015-12-29 | 2016-06-15 | 福建省建筑工程质量检测中心有限公司 | Light-weight high-strength ceramsite sintered with nickel slag powder and preparation method thereof |
| CN106938895A (en) * | 2017-02-14 | 2017-07-11 | 天津理工大学 | A kind of method that lateritic nickel ore acid-soaked waste residue produces building porcelain granule |
| CN109678467A (en) * | 2019-02-18 | 2019-04-26 | 广西银亿新材料有限公司 | It is a kind of to utilize the haydite and preparation method thereof for smelting the preparation of dangerous waste slag |
| CN109970366A (en) * | 2019-04-19 | 2019-07-05 | 四川省劲腾环保建材有限公司 | A method of preparing detection moisture content in extruding dregs porcelain granule |
| CN110950676A (en) * | 2018-09-26 | 2020-04-03 | 广东清大同科环保技术有限公司 | Ferronickel slag hollow ceramic plate and preparation method thereof |
| CN112430062A (en) * | 2019-08-26 | 2021-03-02 | 中国科学院过程工程研究所 | Preparation method of light high-strength ceramsite, prepared light high-strength ceramsite and application |
-
2021
- 2021-05-07 CN CN202110494835.7A patent/CN113292353A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102786239A (en) * | 2012-07-30 | 2012-11-21 | 中国铝业股份有限公司 | Method for producing cement with nickel furnace slag |
| CN103112963A (en) * | 2013-01-15 | 2013-05-22 | 昆明理工大学 | Acidolysis laterite nickel ore wastewater treatment and slag utilization method |
| CN105669163A (en) * | 2015-12-29 | 2016-06-15 | 福建省建筑工程质量检测中心有限公司 | Light-weight high-strength ceramsite sintered with nickel slag powder and preparation method thereof |
| CN106938895A (en) * | 2017-02-14 | 2017-07-11 | 天津理工大学 | A kind of method that lateritic nickel ore acid-soaked waste residue produces building porcelain granule |
| CN110950676A (en) * | 2018-09-26 | 2020-04-03 | 广东清大同科环保技术有限公司 | Ferronickel slag hollow ceramic plate and preparation method thereof |
| CN109678467A (en) * | 2019-02-18 | 2019-04-26 | 广西银亿新材料有限公司 | It is a kind of to utilize the haydite and preparation method thereof for smelting the preparation of dangerous waste slag |
| CN109970366A (en) * | 2019-04-19 | 2019-07-05 | 四川省劲腾环保建材有限公司 | A method of preparing detection moisture content in extruding dregs porcelain granule |
| CN112430062A (en) * | 2019-08-26 | 2021-03-02 | 中国科学院过程工程研究所 | Preparation method of light high-strength ceramsite, prepared light high-strength ceramsite and application |
Non-Patent Citations (6)
| Title |
|---|
| 上海市第一建筑材料有限公司: "《粘土砖瓦工艺》", 31 October 1977, pages: 28 * |
| 于漧: "烧胀页岩生产页岩陶粒的研究", 烧胀页岩生产页岩陶粒的研究, no. 5, pages 33 - 34 * |
| 王培铭: "《绿色建材的研究与应用》", 中国建材工业出版社, pages: 82 * |
| 王明双等: "黑色页岩富镍渣加压酸浸过程中镍的浸出行为", 《矿冶》 * |
| 王明双等: "黑色页岩富镍渣加压酸浸过程中镍的浸出行为", 《矿冶》, no. 02, 25 June 2013 (2013-06-25) * |
| 王海: "掺杂湿法镍冶炼废渣制备新型建材陶粒研究", 《有色矿冶》, 15 April 2021 (2021-04-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636826A (en) * | 2021-09-03 | 2021-11-12 | 荆门绿源环保产业发展有限公司 | Method for preparing environment-friendly brick by using nickel wet-process smelting slag and water-quenched slag |
| CN116003102A (en) * | 2022-12-02 | 2023-04-25 | 浙江省生态环境科学设计研究院 | Method for preparing sintered brick by using heavy metal contaminated soil |
| CN116003102B (en) * | 2022-12-02 | 2024-01-09 | 浙江省生态环境科学设计研究院 | Method for preparing sintered brick by using heavy metal contaminated soil |
| WO2024198237A1 (en) * | 2023-03-30 | 2024-10-03 | 浙江华友钴业股份有限公司 | Method for preparing sintered brick from lateritic nickel ore high-pressure acid leaching smelting tailings, and sintered brick |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113292353A (en) | Method for preparing ceramsite by using nickel wet-process smelting slag | |
| US3770416A (en) | Treatment of zinc rich steel mill dusts for reuse in steel making processes | |
| JPS6035292B2 (en) | glass manufacturing method | |
| CN109022808A (en) | A kind of comprehensive recovering process of the dust of Ferrous Metallurgy containing zinc | |
| CN108359792B (en) | Acid oxidation pellet of titanium concentrate and vanadium iron concentrate bulk concentrate and preparation method thereof | |
| CN111647753B (en) | Method for recovering zinc by direct reduction of melting gasification furnace | |
| CN108275974B (en) | Water permeable brick and method for preparing water permeable brick by using fly ash | |
| CN100580107C (en) | Method for extracting vanadic anhydride from stone coal vanadium ore | |
| CN1055320C (en) | Production method of direct reduction shaft and blast furnace cold-bonded pellet | |
| CN104108946A (en) | Garbage incineration fly ash -based foamed ceramic and preparation method thereof | |
| CN110683832B (en) | Foamed ceramic prepared from waste incineration fly ash and preparation method thereof | |
| CN110317949A (en) | A kind of preparation method of zinc-containing dust pelletizing | |
| CN110183120B (en) | Method for producing cement active admixture by using undisturbed electrolytic manganese slag and steel slag tail mud | |
| CN109678467A (en) | It is a kind of to utilize the haydite and preparation method thereof for smelting the preparation of dangerous waste slag | |
| CN104073632A (en) | Blast furnace oxidized pellet using steel rolling oil sludge as binder and preparation method thereof | |
| CN1255559C (en) | Method for extracting vanadium by roasting material containing vanadium and its equipment | |
| CN109320090B (en) | Method for preparing microcrystalline glass by using chlorine-containing titanium extraction hot slag | |
| CN113800941B (en) | Method for preparing ceramsite by utilizing chromium-contaminated soil and ceramsite | |
| CN113215394B (en) | Treatment method of stone coal | |
| CN109722581A (en) | 85-90 vanadium iron and preparation method thereof | |
| CN114044685B (en) | Method for producing high-aluminum inorganic material by using aluminum ash based on pelletizing method | |
| CN106222402A (en) | A kind of production method of ilmenite concentrate pelletizing | |
| CN113979775B (en) | Method for preparing ceramsite proppant by using secondary aluminum ash | |
| CN113968684B (en) | Method for treating stainless steel pickling sludge and preparing slag cement | |
| CN109279783B (en) | Microcrystalline glass with raw materials including chlorine-containing titanium extraction slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210824 |