CN113105131B - Method for purifying ash by comprehensively utilizing calcium carbide - Google Patents
Method for purifying ash by comprehensively utilizing calcium carbide Download PDFInfo
- Publication number
- CN113105131B CN113105131B CN202110301680.0A CN202110301680A CN113105131B CN 113105131 B CN113105131 B CN 113105131B CN 202110301680 A CN202110301680 A CN 202110301680A CN 113105131 B CN113105131 B CN 113105131B
- Authority
- CN
- China
- Prior art keywords
- calcium
- calcium carbide
- magnesium
- ash
- grinding
- 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.)
- Active
Links
- 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 title claims abstract description 82
- 239000005997 Calcium carbide Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 26
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000011777 magnesium Substances 0.000 claims abstract description 37
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 37
- 239000002699 waste material Substances 0.000 claims abstract description 35
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011575 calcium Substances 0.000 claims abstract description 28
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 28
- 238000000227 grinding Methods 0.000 claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 239000003245 coal Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000007873 sieving Methods 0.000 claims abstract description 8
- 238000001354 calcination Methods 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims abstract description 5
- 238000005453 pelletization Methods 0.000 claims description 10
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 12
- 239000008188 pellet Substances 0.000 description 12
- 239000011734 sodium Substances 0.000 description 12
- 229910052708 sodium Inorganic materials 0.000 description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 239000000395 magnesium oxide Substances 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000003469 silicate cement Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000011863 silicon-based powder Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 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
- 230000003647 oxidation Effects 0.000 description 1
- 239000007790 solid phase 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
- C04B7/19—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- 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
-
- 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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for comprehensively utilizing calcium carbide to purify ash, which comprises the following steps: (1) Calcining the calcium carbide purified ash with oxygen, and cooling for standby; (2) crushing and grinding the reducing agent for later use; (3) Mixing the standby purified ash with a reducing agent, grinding, sieving and preparing balls for standby. The reducer is added according to 90% -120% of the required theoretical amount; (4) Carrying out vacuum thermal reduction on the mixed ball-making material to obtain coarse magnesium and calcium-based waste residues, and refining the coarse magnesium to obtain refined magnesium and magnesium ingots; (5) And (3) cooling the calcium-based waste residue, mixing a certain amount of carbide slag and coal slag, grinding, roasting, cooling and grinding to obtain the finished Portland cement. The invention can realize the comprehensive utilization of the whole components of the calcium carbide purified ash, and is a green high-valued waste residue comprehensive utilization method.
Description
Technical Field
The invention belongs to the field of calcium carbide production, and particularly relates to a method for comprehensively utilizing calcium carbide to purify ash.
Background
The first production and consumption of calcium carbide in the world are large, the calcium carbide productivity accounts for more than 90% of the total world productivity, and the annual output exceeds 3500 ten thousand tons. The calcium carbide is formed by solid phase melting reaction of lime and coke in a closed calcium carbide furnace through arc heat, a large amount of high-temperature calcium carbide furnace tail gas is generated in the reaction process, the tail gas mainly comprises carbon monoxide and solid dust, the tail gas firstly enters a settler to settle 40% -50% of large-particle dust, then the tail gas is subjected to cooling and dust removal through an air cooler, then enters a bag-type dust remover to carry out fine filtration, and the solid dust collected through the settler, the air cooler and the bag-type dust remover is called purified ash. Generally, about 2 to 7 percent of calcium carbide purifying ash can be produced in the production of one ton of calcium carbide. The calcium carbide purifying ash mainly contains elements such as carbon, calcium, magnesium, silicon, aluminum, iron, potassium, sodium and the like, wherein the contents of the carbon, the calcium, the magnesium and the silicon are higher, the carbon part exists in a simple substance form, the calcium part exists in a calcium carbide form, the calcium mainly exists in a simple substance form, the calcium carbide and the calcium oxide form, the magnesium and the silicon part exists in a simple substance form, the magnesium and the silicon part exists in an oxide form, and the aluminum, the sodium and the potassium mainly exist in an oxide form. Because the calcium carbide purification ash contains partial calcium carbide, metal simple substance and simple substance carbon, and the substances exist in a powdery form, the calcium carbide purification ash is easy to naturally meet air, and the calcium carbide purification ash has the characteristics of small granularity, high loss on ignition, light specific gravity, high viscosity, strong alkalinity and easy dust raising, so that the transportation treatment is difficult, the environment is polluted, and various safety problems exist. At present, the calcium carbide purifying ash mainly takes landfill and stacking as main materials, and serious pollution is caused to the ecological environment and safety.
The calcium carbide purifying ash is used as solid waste in the calcium carbide industry, the components are complex and variable, and the treatment method becomes a bottleneck problem of green development in the calcium carbide industry.
Disclosure of Invention
Aiming at the problem that no effective treatment method exists for the calcium carbide purifying ash at present, the invention provides a method for comprehensively utilizing the calcium carbide purifying ash, and solves the problem of treating the solid waste of the purifying ash in the calcium carbide industry.
The method comprises the steps of firstly converting combustible substances in calcium carbide purification ash into oxides through oxidization, then reducing magnesium oxide in the materials into magnesium metal through vacuum thermal reduction, and finally obtaining calcium-based waste residues with main components of calcium oxide and calcium silicate, wherein the calcium-based waste residues are used as silicate cement raw materials. The process has no secondary pollution such as waste water, waste residue and the like in the process of treating the calcium carbide purified ash.
The method of the invention comprises the following steps:
(1) The calcium carbide purified ash is subjected to aerobic calcination, and the elemental carbon is combusted into CO 2 Removing; the metal calcium, magnesium and silicon in the purified ash are combined with oxygen to form oxides, and the oxides are cooled for standby; and calcining the mixture for 2-6 hours at 800-900 ℃ in an air atmosphere.
(2) Crushing and grinding the reducing agent to ensure that the particle size is less than or equal to 0.15mm for standby. The reducing agent can be at least one of ferrosilicon, calcium carbide and silicon powder.
(3) Mixing the calcium carbide purified ash obtained by aerobic calcination in the step (1) with the reducing agent obtained in the step (2), grinding, sieving and pelletizing for later use; the reducing agent is mixed according to 90% -120% of theoretical amount to form a mixed material.
(4) And (3) carrying out vacuum thermal reduction on the mixed material prepared in the step (3) to prepare magnesium, obtaining coarse magnesium and reduced calcium-based waste residues, and refining the coarse magnesium to obtain refined magnesium, magnesium ingots and the like. The vacuum degree of magnesium prepared by a vacuum thermal reduction method is 0.1-30 Pa, the reduction temperature is 1100-1250 ℃, and the reduction time is 2-12 h. The purity of the magnesium ingot obtained by reduction reaches Mg9980 specified by the national standard GBT 3499-2011.
(5) And (3) cooling the calcium-based waste residue obtained in the step (4), mixing a certain amount of carbide slag and coal slag, and grinding, roasting, cooling and grinding to obtain the finished cement. The mixing amount of the carbide slag is 5-40% of the mass of the calcium-based waste slag; the blending amount of the coal slag is 5% -20% of the mass of the calcium-based waste slag; and the roasting temperature is 1320-1450 ℃, and the silicate cement is finally obtained. The cement performance reaches the national standard GB175-2007 of general Portland Cement, and the strength reaches 42.5.
The method of the invention burns combustible matters in the purified ash through the oxidation pretreatment of the calcium carbide purified ash, converts metal simple substances into oxides, then separates magnesium oxide from materials in the calcium carbide purified ash into high added value metal magnesium through vacuum thermal reduction, and simultaneously realizes that the waste residue after reduction and magnesium extraction meets the requirements of silicate cement raw materials, and further produces cement. Finally, the high-value utilization of the whole components of the calcium carbide purified ash is realized. The process for treating the calcium carbide purified ash has no secondary pollution such as waste water, waste residue and the like in the treatment process, is a green treatment process, and can obtain certain economic benefit. The method carries out high-value comprehensive utilization on the full components of the purified calcium carbide ash, thoroughly solves the disposal problem of the waste slag, changes waste into valuable, and supports the green sustainable development of the calcium carbide industry.
Detailed Description
Example 1
The method for comprehensively utilizing the calcium carbide to purify the ash specifically comprises the following steps:
(1) The purified calcium carbide ash is conveyed to a buffer bin from a bag-type dust remover of a calcium carbide furnace under the protection of nitrogen, is conveyed to a fluidized bed furnace by a compressed air pipeline, and is oxidized and calcined for 2 hours in the air atmosphere at 800 ℃. The main components of the calcined calcium carbide purified ash are as follows: 45% of CaO, 35% of MgO and SiO 2 8%，Na 2 O 3%，K 2 O 1.5%，Al 2 O 3 3%, the other 4.5%.
(2) Crushing and grinding calcium carbide, wherein the particle size of calcium carbide powder is less than or equal to 0.15mm.
(3) Uniformly mixing calcined calcium carbide purified ash with calcium carbide powder, grinding, sieving and pelletizing; wherein the mass of the calcium carbide powder is 0.504 times of the mass of the calcined calcium carbide purified ash (90% of the required theoretical amount); the pelletizing pressure is 100MPa when the pellets are produced, the produced pellets are placed into a vacuum reduction tank, the vacuum degree is 10-20 Pa, the reduction temperature is 1200 ℃ for 10 hours, the crystallizer is taken out after the reduction is finished, the crystallization product is separated from the crystallizer, crystalline magnesium and massive white crystals are obtained after the separation, and the crystalline magnesium is cast after remelting refiningObtaining a metal magnesium ingot by the ingot; removing the calcium-based waste residues in the reduction tank, cooling in air, and obtaining the calcium-based waste residues with the following components: caO 83%, mgO 3%, siO 2 5%，Na 2 O 0.80 %，K 2 O 0.30%，Al 2 O 3 2%, the other 5.90%.
(4) Mixing 17% of carbide slag and 5% of coal slag with the reducing waste residue obtained in the step (3); roasting for 4h at 1350 ℃ and cooling and grinding to obtain the Portland cement.
Example 2
The method for comprehensively utilizing the calcium carbide to purify the ash specifically comprises the following steps:
(1) The purified calcium carbide ash is conveyed to a buffer bin from a bag-type dust collector of a calcium carbide furnace under the protection of nitrogen, is conveyed to a fluidized bed furnace by a compressed air pipeline, and is oxidized and calcined for 2.5 hours in the air atmosphere at 900 ℃. The main components of the calcined calcium carbide purified ash are as follows: caO 47%, mgO 33%, siO 2 8%，Na 2 O2%，K 2 O 2%，Al 2 O 3 3%, the other 5%.
(2) Crushing and grinding calcium carbide, wherein the particle size of calcium carbide powder is less than or equal to 0.15mm.
(3) Uniformly mixing calcined calcium carbide purified ash with calcium carbide powder, grinding, sieving and pelletizing; wherein the mass of the calcium carbide powder is 0.58 times (110% of the theoretical amount) of the mass of the calcined calcium carbide purified ash; the pelletizing pressure is 80MPa when the pellets are produced, the produced pellets are placed into a vacuum reduction tank, the vacuum degree is 5-10 Pa, the reduction temperature is 1100 ℃ for 8 hours, a crystallizer is taken out after the reduction is finished, a crystallization product is separated from the crystallizer, crystalline magnesium and a blocky white crystal are obtained after the separation, and the crystalline magnesium is remelted and refined to obtain a cast ingot to obtain a magnesium metal ingot; removing the calcium-based waste residues in the reduction tank, cooling in air, and obtaining the calcium-based waste residues with the following components: caO 84%, mgO 4%, siO 2 6%，Na 2 O 0.50 %，K 2 O 0.50%，Al 2 O 3 1%, the other 4%.
(4) Mixing the reducing waste residue obtained in the step (3) with 36% of carbide slag and 4% of coal slag; roasting at 1400 deg.c for 4 hr, cooling and grinding to obtain silicate cement.
Example 3
The method for comprehensively utilizing the calcium carbide to purify the ash specifically comprises the following steps:
(1) The purified calcium carbide ash is conveyed to a buffer bin from a bag-type dust remover of a calcium carbide furnace under the protection of nitrogen, is conveyed to a fluidized bed furnace by a compressed air pipeline, and is oxidized and calcined for 3 hours in an air atmosphere at 850 ℃. The main components of the calcined calcium carbide purified ash are as follows: 45% of CaO, 30% of MgO and SiO 2 15%，Na 2 O 2%，K 2 O 2%，Al 2 O 3 3%, the other 3%.
(2) Crushing and grinding ferrosilicon, wherein the grain diameter is less than or equal to 0.15mm.
(3) Uniformly mixing the calcined calcium carbide purified ash with ferrosilicon, grinding, sieving and pelletizing; wherein the mass of the ferrosilicon is 0.183 times of the mass of the calcined calcium carbide purified ash (100% of the theoretical amount); preparing the mixed materials into pellets, wherein the pelleting pressure is 150MPa when the pellets are prepared, placing the prepared pellets into a vacuum reduction tank, reducing for 6 hours under the conditions of 10-15 Pa and 1230 ℃ of reduction temperature, taking out a crystallizer after the reduction is finished, separating a crystallization product from the crystallizer, remelting and refining crystalline magnesium, and casting ingots to obtain metal magnesium ingots. Pouring out the calcium-based waste residue in the reduction tank, and cooling in the air to obtain the following calcium-based waste residue components: 80% of CaO, 2.5% of MgO and SiO 2 12%，Na 2 O 0.30 %，K 2 O 0.70%，Al 2 O 3 2%, the other 2.5%. The calcium-based waste residue is used as a raw material of Portland cement.
(4) Mixing the reducing waste residue obtained in the step (3) with 20% of carbide slag and 8% of coal slag; roasting at 1380 ℃ for 6 hours, cooling and grinding to obtain the Portland cement.
Example 4
The method for comprehensively utilizing the calcium carbide to purify the ash specifically comprises the following steps:
(1) The purified calcium carbide ash is conveyed to a buffer bin from a bag-type dust remover of a calcium carbide furnace under the protection of nitrogen, is conveyed to a fluidized bed furnace by a compressed air pipeline, and is oxidized and calcined for 4 hours in an air atmosphere at 850 ℃. Main component of calcium carbide purified ash after calcinationThe following are provided: 47% of CaO, 27% of MgO and SiO 2 13%，Na 2 O 2%，K 2 O 2%，Al 2 O 3 5% and the other 4%.
(2) Crushing and grinding ferrosilicon, wherein the grain diameter is less than or equal to 0.15mm.
(3) Uniformly mixing the calcined calcium carbide purified ash with ferrosilicon, grinding, sieving and pelletizing; wherein the mass of the ferrosilicon is 0.22 times (120% of the theoretical amount) of the mass of the calcined calcium carbide purified ash; preparing the mixed materials into pellets, wherein the pelleting pressure is 100MPa when the pellets are prepared, placing the prepared pellets into a vacuum reduction tank, reducing for 8 hours under the conditions that the vacuum degree is 15-20 Pa and the reduction temperature is 1250 ℃, taking out a crystallizer after the reduction is finished, separating a crystallization product from the crystallizer, remelting and refining crystalline magnesium, and casting ingots to obtain metal magnesium ingots. Pouring out the calcium-based waste residue in the reduction tank, and cooling in the air to obtain the following calcium-based waste residue components: 81% of CaO, 3% of MgO and SiO 2 10%，Na 2 O 0.50 %，K 2 O 0.50%，Al 2 O 3 2%, the other 3%. The calcium-based waste residue is used as a raw material of Portland cement.
(4) Mixing the reducing waste residue obtained in the step (3) with 25% of carbide slag and 10% of coal slag; roasting at 1450 deg.c for 4 hr, cooling and grinding to obtain silicate cement.
Example 5
The method for comprehensively utilizing the calcium carbide to purify the ash specifically comprises the following steps:
(1) The purified calcium carbide ash is conveyed to a buffer bin from a bag-type dust remover of a calcium carbide furnace under the protection of nitrogen, is conveyed to a fluidized bed furnace by a compressed air pipeline, and is oxidized and calcined for 6 hours in the air atmosphere at 900 ℃. The main components of the calcined calcium carbide purified ash are as follows: caO 50%, mgO 27%, siO 2 11%，Na 2 O 2 %，K 2 O 2 %，Al 2 O 3 3%, the other 5%.
(2) Grinding silicon powder, wherein the grain diameter of the silicon powder is less than or equal to 0.15mm.
(3) Uniformly mixing the calcined calcium carbide purified ash with silicon powder, grinding, sieving and pelletizing; wherein the mass of the silicon powder is the calcium carbide purified ash after calcination0.633 times the amount (110% of the theoretical amount required); the pelletizing pressure is 90MPa when the pellets are produced, the produced pellets are placed into a vacuum reduction tank, the vacuum degree is 5-10 Pa, the reduction temperature is 1150 ℃ and the reduction is carried out for 12 hours, after the reduction is finished, a crystallizer is taken out, a crystallization product is separated from the crystallizer, crystalline magnesium and a blocky white crystal are obtained after separation, and the crystalline magnesium is remelted and refined to obtain a cast ingot to obtain a magnesium metal ingot; removing the calcium-based waste residues in the reduction tank, cooling in air, and obtaining the calcium-based waste residues with the following components: caSiO (CaSiO) 3 65%，MgO 2.7%，SiO 2 28%，Na 2 O 0.80 %，K 2 O 0.50%，Al 2 O 3 1%, the other 2%.
(4) Mixing 10% of carbide slag and 10% of coal slag with the reducing waste residue obtained in the step (3); roasting at 1360 deg.c for 2 hr, cooling and grinding to obtain silicate cement.
The properties of the magnesium ingots and cement obtained from examples 1-5 above were as follows:
the above examples are merely illustrative of the present invention and are not to be construed as limiting the scope of the present invention, as those of ordinary skill in the art will appreciate: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the technical proposal of the invention, the invention is covered in the scope of the technical proposal of the invention, and the invention belongs to the scope of the protection of the invention.
Claims (2)
1. The method for comprehensively utilizing the calcium carbide to purify the ash is characterized by comprising the following steps of:
(1) Calcining the calcium carbide purified ash in an aerobic manner at 800-900 ℃ in an air atmosphere for 2-6 hours, and cooling for later use;
(2) Mixing the calcium carbide purified ash obtained by aerobic calcination in the step (1) with a reducing agent, grinding, sieving and pelletizing for later use; the reducing agent is mixed according to 90% -120% of theoretical amount to form a mixed material;
(3) Carrying out vacuum thermal reduction on the mixed material prepared in the step (2) to prepare magnesium, obtaining coarse magnesium and reduced calcium-based waste residues, and refining the coarse magnesium to obtain refined magnesium and magnesium ingots; the vacuum degree of magnesium prepared by the vacuum thermal reduction method is 0.1-30 Pa, the magnesium is heated to 1100-1250 ℃ and the reduction time is 2-12 h;
(4) Cooling the calcium-based waste residue obtained in the step (3), mixing carbide slag and coal slag, grinding, roasting, cooling and grinding to obtain finished cement; the mixing amount of the carbide slag is 5-40% of the mass of the calcium-based waste slag, the mixing amount of the coal slag is 5-20% of the mass of the calcium-based waste slag, and the roasting temperature is 1320-1450 ℃.
2. The method for purifying ash by comprehensively utilizing calcium carbide according to claim 1, wherein in the step (2), the reducing agent is at least one of ferrosilicon and calcium carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110301680.0A CN113105131B (en) | 2021-03-22 | 2021-03-22 | Method for purifying ash by comprehensively utilizing calcium carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110301680.0A CN113105131B (en) | 2021-03-22 | 2021-03-22 | Method for purifying ash by comprehensively utilizing calcium carbide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113105131A CN113105131A (en) | 2021-07-13 |
| CN113105131B true CN113105131B (en) | 2023-06-06 |
Family
ID=76710269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110301680.0A Active CN113105131B (en) | 2021-03-22 | 2021-03-22 | Method for purifying ash by comprehensively utilizing calcium carbide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113105131B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116395999A (en) * | 2023-04-06 | 2023-07-07 | 石河子大学 | Calcium-magnesium composite expanding agent and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2296609A1 (en) * | 1997-10-02 | 1999-04-15 | Jacques Mortimer | Processing and use of carbide lime |
| CN106242331A (en) * | 2016-08-12 | 2016-12-21 | 天伟水泥有限公司 | A kind of carbide purifies ash second-time burning and produces the formula of cement |
| CN108502884A (en) * | 2018-03-23 | 2018-09-07 | 宁夏宝塔化工中心实验室(有限公司) | A method of producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0428148A3 (en) * | 1989-11-13 | 1992-02-12 | Aeci Limited | Process for producing calcium carbide |
| CN101705374A (en) * | 2009-11-06 | 2010-05-12 | 北京大学 | Process for improving production rate of metal magnesium by accelerating reduction |
| CN102351444B (en) * | 2011-07-21 | 2013-05-22 | 新疆天业（集团）有限公司 | Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature |
| CN104860556B (en) * | 2014-02-24 | 2018-07-13 | 唐山北极熊建材有限公司 | Quick setting and rapid hardening belite sulphoaluminate cement clinker, application and its production technology |
| CN104086107A (en) * | 2014-07-03 | 2014-10-08 | 新疆天业（集团）有限公司 | Method of comprehensively utilizing precipitator ash and slag of calcium carbide furnace |
| CN110926224A (en) * | 2019-11-22 | 2020-03-27 | 北京百特莱德工程技术股份有限公司 | Closed calcium carbide purification ash recycling system and using method thereof |
-
2021
- 2021-03-22 CN CN202110301680.0A patent/CN113105131B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2296609A1 (en) * | 1997-10-02 | 1999-04-15 | Jacques Mortimer | Processing and use of carbide lime |
| CN106242331A (en) * | 2016-08-12 | 2016-12-21 | 天伟水泥有限公司 | A kind of carbide purifies ash second-time burning and produces the formula of cement |
| CN108502884A (en) * | 2018-03-23 | 2018-09-07 | 宁夏宝塔化工中心实验室(有限公司) | A method of producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113105131A (en) | 2021-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109928414B (en) | Method for synchronously preparing calcium aluminate steelmaking desulfurizer by removing impurities through aluminum ash sintering | |
| CN112607758B (en) | Method for preparing calcium aluminate by synergistic treatment of high-magnesium aluminum ash and fly ash | |
| CN108147443B (en) | Method for extracting aluminum oxide from fly ash and preparing ferro-silicon alloy | |
| CN112111660B (en) | Method for enriching lithium from lithium ore and preparing ferro-silicon alloy and recycling aluminum oxide | |
| CN112680564B (en) | Method for preparing calcium aluminate steelmaking desulfurizer by melting high magnesium aluminum ash | |
| CN113105131B (en) | Method for purifying ash by comprehensively utilizing calcium carbide | |
| CN115710634A (en) | Method for treating sintering dust removal ash and waste coating of continuous casting tundish | |
| CN115505745A (en) | Method for treating fly ash in sintering process by using steel slag thermal coupling technology | |
| CN111101002A (en) | Production process for magnesium smelting and cement co-production by Pidgeon process | |
| CN113913619A (en) | Method for efficiently removing nitrogen from secondary aluminum ash and preparing premelted calcium aluminate refining agent | |
| CN114150098A (en) | Method for preparing premelted calcium aluminate and metallic iron by reducing iron ore with secondary aluminum ash | |
| CN112723400B (en) | Method for melting calcium aluminate by synchronously activating, inerting, impurity removing and low-magnesium aluminum ash | |
| CN113913621B (en) | Method for preparing aluminum-silicon-iron alloy by using high-aluminum gangue and purifying in grading manner | |
| CN101450843B (en) | Iron and aluminum complex ore comprehensive utilization method | |
| CN112080598A (en) | Method and system for comprehensively utilizing slag resources of iron and steel smelting and blast furnace slag tank | |
| KR102630333B1 (en) | Method for manufacturing high-purity magnesium oxide from waste refractory material through eco-friendly hydrometallurgical application process and magnesium oxide manufactured thereby | |
| CN112499658A (en) | Treatment method of aluminum electrolysis waste carbon slag and obtained regenerated cryolite | |
| CN117025982A (en) | Preparation method of vanadium-chromium-iron alloy | |
| CN113548842B (en) | Method for preparing baking-free brick by using ash | |
| CN114015873A (en) | Method for preparing manganese-silicon alloy from lithium ore and enriching lithium | |
| CN108623293A (en) | The technique that a kind of ardealite and red mud prepare high white pottery ceramic material coproduction acid | |
| CN113564345A (en) | Method for recycling and harmlessly treating vanadium-containing petroleum slag | |
| CN112374522A (en) | Barite high-purity purification process | |
| CN108642231B (en) | Converter slag modifier and method for preparing low-alkalinity slag system by using same | |
| KR101050147B1 (en) | Manufacturing method of flux composition for steelmaking |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |