CN108609875B - Method for preparing cement mixture by using converter slag - Google Patents
Method for preparing cement mixture by using converter slag Download PDFInfo
- Publication number
- CN108609875B CN108609875B CN201810462307.1A CN201810462307A CN108609875B CN 108609875 B CN108609875 B CN 108609875B CN 201810462307 A CN201810462307 A CN 201810462307A CN 108609875 B CN108609875 B CN 108609875B
- Authority
- CN
- China
- Prior art keywords
- slag
- cao
- raw materials
- quality
- mixture
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 92
- 239000000203 mixture Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000004568 cement Substances 0.000 title claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 79
- 229910052742 iron Inorganic materials 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 16
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 16
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 16
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 13
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000004615 ingredient Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 33
- 239000000292 calcium oxide Substances 0.000 claims description 25
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 25
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 14
- 239000000395 magnesium oxide Substances 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 7
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 9
- 239000002910 solid waste Substances 0.000 abstract description 5
- 239000006227 byproduct Substances 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 14
- 239000011574 phosphorus Substances 0.000 description 14
- 230000009467 reduction Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 235000013980 iron oxide Nutrition 0.000 description 8
- 238000009628 steelmaking Methods 0.000 description 8
- 239000002956 ash Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- LFGREXWGYUGZLY-UHFFFAOYSA-N phosphoryl Chemical class [P]=O LFGREXWGYUGZLY-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000004017 vitrification Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- JVEVIFRPMAXOFM-UHFFFAOYSA-N [Fe].[P]=O Chemical compound [Fe].[P]=O JVEVIFRPMAXOFM-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
- 239000002918 waste heat 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
- C04B7/424—Oxides, Hydroxides
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- 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)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for preparing a cement mixture by using converter slag, which comprises the following steps: analyzing chemical components of raw materials, calculating ingredients, crushing and screening the raw materials, drying, mixing the raw materials, heating at high temperature, cooling, crushing, separating slag and metal to obtain final slag and alloy; CaO/SiO in terms of basicity of the mixture2、(CaO+MgO)/(SiO2+Al2O3) And fixed carbon content McThe quality of the blast furnace dust, converter slag and iron tailings is obtained as a material proportioning basis; the mixture satisfies the following formula: CaO/SiO2＝0.5～1.3；(CaO+MgO)/(SiO2+Al2O3)＝0.7‑1.2；
Description
Technical Field
The invention belongs to the field of recycling of solid waste resources in a converter steelmaking process, and particularly relates to a method for preparing a cement mixture by using converter slag.
Background
Converter slag is an industrial solid waste generated in the process of converter steelmaking. 0.1 to 0.13 ton of steel slag is produced as a byproduct in each 1 ton of steel produced at the temperature of 1350 to 1450 ℃. The iron-containing slag-free smelting furnace further contains 10-30% of total iron (TFe) and a large amount of beneficial elements such as calcium, magnesium and silicon, so that the recycling of converter slag resources is increased, and the iron-containing slag-free smelting furnace becomes a main means for reducing the smelting cost of a steel mill and realizing zero discharge of wastes. At present, the main treatment method for converter slag is to crush, screen and magnetically separate cold converter slag, extract metal oxides in the cold converter slag and then utilize the extracted metal oxides, and the treated converter slag is usually used for foundation backfill, road paving, cement raw materials, water purifying agents, steel slag fertilizers and the like. The two products obtained by the treatment method are the iron oxide and the high-alkalinity slag system respectively, and the added value of the products is lower.
The cement mixture is a slag system with a vitrification rate of more than 80%, high gelling activity, a binary alkalinity of 0.8-1.3 and an iron oxide content of less than 5%.
A method for reducing converter slag and recycling slag by using coal gas (CN 105624359A) discloses a method for reducing converter slag and recycling slag by using coal gas, which comprises the following steps: the converter smelting process is divided into two flows of converter steelmaking and converter slag heat treatment, wherein in the converter steelmaking flow, impurity elements in molten iron enter the converter slag in the form of oxides through oxidation reaction to form thermal state converter slag with high phosphorus content; pouring the converter slag into a processing slag filling unit, entering the heat treatment process of the converter slag, transferring the slag filling unit containing the converter slag to a converter slag processing station, carrying out thermal state reduction by taking coal gas as a reduction medium in the converter slag processing station, wherein the reduction ratio of FeO is more than 80%, the reduction ratio of P2O5 is more than 80%, carrying out waste heat recovery and gaseous phosphorus recovery of the converter slag simultaneously in the thermal state reduction processing process, and returning the converter slag after the processing as pre-molten slag and iron-containing cooling materials to the converter for reuse. The slag system obtained by the method has higher binary alkalinity and low vitrification rate and gelling activity, and free calcium oxide exists in the slag, so the slag system can not be applied in the cement industry.
A steel slag processing method and a device thereof (CN 103757152B) disclose a steel slag processing method which comprises the steps of feeding silicon-aluminum acid oxide and steel slag, wherein the molar ratio of the total silicon-aluminum acid oxide to the basic oxide in the mixture is 1: 2.5-2.9; the temperature of the rotary kiln is 1350-; granulating the product into particles, performing water quenching and cooling, then falling into water, and performing dehydration treatment; and (4) carrying out magnetic separation on the dehydrated particles, and separating the steel particles from the silicate particles. In the method, the reducing agent is a mixture of carbon monoxide and coal powder, so that the cost of the raw materials is high. And the combustion process of the pulverized coal of the rotary kiln necessarily introduces oxygen in the air, and compared with a reducing agent, the process is complex and the reduction efficiency is low.
A method disclosed in "a method for recovering iron and phosphorus from steelmaking slag" (CN 102264919 a) is capable of recovering phosphorus and iron from the steelmaking slag at low cost and effectively utilizing the recovered phosphorus and iron as resources, respectively, by including the steps of: a first step of reducing phosphorus-containing steel-making slag such as dephosphorization slag with a reducing agent such as carbon, Si, Al, etc., and reducing and recovering iron oxide and phosphorus oxide in the slag as phosphorus-containing molten iron; a second step of using the steel-making slag from which the iron oxides and phosphorus oxides have been removed as a CaO source in the sintering step, and recycling the obtained sintered ore to the blast furnace; a third step of concentrating phosphorus in a CaO flux by dephosphorizing the molten iron containing phosphorus recovered by the reduction treatment until the phosphorus concentration in the molten iron containing phosphorus becomes 0.1 mass% or less; and a fourth step of mixing the molten iron containing phosphorus with a phosphorus concentration of 0.1 mass% or less as an iron source into the blast furnace molten iron. The slag obtained by the method has high CaO content in percentage by mass, so that only a small amount of CaO in a sintering process can be replaced, the slag with gelling property cannot be obtained, the added value of the product is low, and the reutilization value of the slag is limited.
Recovery of Fe and P from CaO-SiO by Taeyoung Kim et al2-FetO-P2O5The Slag byMicrowave Treatment article introduces a laboratory study of the reduction Treatment of converter Slag by graphite carbon heated by microwave. Wherein the equilibrium constant of carbon is 1.69, the reduction rate of iron is reached after heating for 15 minutesTo 0.97, phosphorus was 0.89. The Liuchun Wei et al, the theory of Valorization of BOF Steel Slag by Reduction and Phase Modification, Metarecovery and Slag Valorization, introduced the laboratory study of carbothermic Reduction of iron and phosphorus oxides in Slag and the adjustment of alkalinity by adding alumina and silica to prepare different Slag products. The reaction is reduced for 1 hour at 1600 ℃, the removal rate of iron oxide is more than 0.9, and the removal mechanism of iron-phosphorus oxide is introduced. The reducing agents used in both articles are graphitic carbon, which is difficult to achieve economically in large-scale industrialization.
The invention introduces the existing method for recycling converter slag, most of which are methods for removing iron-containing substances in slag by carbothermic reduction of iron oxides or magnetic separation, and provides a method for preparing cement mixture by using blast furnace dust removal ash, mine difficultly-treated tailings and converter slag as raw materials in order to fully utilize wastes generated by iron and steel enterprises2-Al2O3The similar blast furnace slag system can be applied to preparing cement. According to the background information, the invention provides a method for preparing a cement mixture by using converter slag.
Disclosure of Invention
The invention aims to overcome the problems and the defects and provides a method for preparing a cement mixture by using converter slag, which prepares the cement mixture similar to blast furnace slag by using waste blast furnace fly ash, mine iron tailings and converter slag generated by iron and steel enterprises as raw materials and simultaneously generates a byproduct iron.
A method for preparing a cement mixture by using converter slag comprises the following steps: chemical component analysis of raw materials, proportioning calculation, crushing and screening of raw materials, drying, mixing of raw materials, high-temperature heating, cooling, crushing, separation of slag and metal to obtain final slag and alloy;
the cement mixture is prepared by fully and uniformly mixing blast furnace dust, converter slag and iron tailings serving as raw materials;
(1) chemical composition analysis of raw materials:
firstly, respectively detecting CaO, CaO and the like in the blast furnace dust, converter slag and iron tailings of the raw materials to be mixed, MgO、SiO2、Al2O3、FeO、Fe2O3、MnO、P2O5Fixed carbon content McThe mass percentage of (A);
(2) and (3) ingredient calculation:
the material preparation basis is as follows: the required quality of blast furnace dust, converter slag and iron tailings is obtained by taking the alkalinity CaO/SiO2, (CaO + MgO)/(SiO2+ Al2O3) and the fixed carbon content Mc of the mixture as the basis of ingredients;
alkalinity CaO/SiO of the mixture2、(CaO+MgO)/(SiO2+Al2O3) And McThe following formula is satisfied:
CaO/SiO20.5 to 1.3 (one)
(CaO+MgO)/(SiO2+Al2O3) 0.7-1.2 (two)
Wherein: mcMixture fixed carbon mass, MFe2O3Mass of mixed iron oxide, MFeOQuality of ferrous oxide of the mixture, MP2O5Quality of mixed phosphorus pentoxide, MMnO-quality of mixed material manganese oxide;
(3) high-temperature heating:
and (3) heating the mixed blast furnace dust removal ash, converter slag and iron tailing mixture at a high temperature of not less than 1450 ℃, in a non-oxidizing atmosphere, and keeping the temperature for not less than 20 minutes.
Further, the blast furnace dust removal ash, converter slag and iron tailings with the granularity of less than 1mm account for more than 70% by mass, and the water content is less than 2% by mass.
The invention has the beneficial effects that: the invention discloses a method for preparing a cement mixture by using converter slag, which takes blast furnace dust as a reducing agent, reduces the alkalinity of a slag system by using the characteristic of high silicon content in iron tailings, solves the problem that three solid wastes of a steel enterprise are difficult to treat, and simultaneously obtains a replenishing material and a byproduct reduced molten iron which can be used for preparing a cement product; the land resource occupation of the solid waste is solved, and the added value of the product is improved.
Detailed Description
The present invention is further illustrated by the following examples.
According to the technical scheme, the method comprises the steps of raw material chemical component analysis, ingredient calculation, raw material crushing and screening, drying, raw material mixing, high-temperature heating, cooling, crushing and slag-metal separation to obtain final slag and alloy.
The cement mixture is prepared by fully and uniformly mixing blast furnace dust, converter slag and iron tailings serving as raw materials;
(4) chemical composition analysis of raw materials:
firstly, CaO, MgO and SiO in the blast furnace dust, converter slag and iron tailings of the raw materials to be mixed are respectively detected2、Al2O3、FeO、Fe2O3、MnO、P2O5Fixed carbon content McThe mass percentage of (A);
(5) and (3) ingredient calculation:
the material preparation basis is as follows: CaO/SiO in terms of basicity of the mixture2、(CaO+MgO)/(SiO2+ Al2O3) And fixed carbon content McThe quality of the blast furnace dust, converter slag and iron tailings is obtained as a material proportioning basis;
alkalinity CaO/SiO of the mixture2、(CaO+MgO)/(SiO2+Al2O3) And McThe following formula is satisfied:
CaO/SiO20.5 to 1.3 (one)
(CaO+MgO)/(SiO2+Al2O3) 0.7-1.2 (two)
Wherein: mcMixture fixed carbon mass, MFe2O3Mass of mixed iron oxide, MFeOQuality of ferrous oxide of the mixture, MP2O5Quality of mixed phosphorus pentoxide, MMnOMixingThe quality of the mixed material manganese oxide;
(6) high-temperature heating:
and (3) heating the mixed blast furnace dust removal ash, converter slag and iron tailing mixture at a high temperature of not less than 1450 ℃, in a non-oxidizing atmosphere, and keeping the temperature for not less than 20 minutes.
Further, the blast furnace dust removal ash, converter slag and iron tailings with the granularity of less than 1mm account for more than 70% by mass, and the water content is less than 2% by mass.
The chemical composition analysis of the raw materials of the examples of the present invention is shown in Table 1. In the embodiment of the invention, the alkalinity of the final slag and the M of the cement mixture are presetcSee table 2. The raw material components of the cement mixture of the embodiment of the invention are shown in Table 3. The properties of the cement mixtures of the examples of the invention are shown in Table 4.
TABLE 1 chemical composition (wt%) of raw materials of inventive examples
TABLE 2 Preset Final slag basicity and M for cement mixes according to the examples of the inventionc
TABLE 3 Cement admixture raw Material composition (wt%) of Cement admixture of inventive example
| Raw materials | Converter slag | Iron tailings | Blast furnace dust removal ash |
| 1 | 50.0 | 25.9 | 24.1 |
| 2 | 55.2 | 20.0 | 24.8 |
| 3 | 59.2 | 15.6 | 25.2 |
| 4 | 62.2 | 12.0 | 25.8 |
TABLE 4 Properties of the Cement blends of the examples of the invention
In order to describe the present invention, the above embodiments are properly and fully described by way of examples, and the above embodiments are only used for illustrating the present invention and not for limiting the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. should be included in the protection scope of the present invention, and the protection scope of the present invention should be limited by the claims.
Claims (2)
1. A method for preparing a cement mixture by using converter slag comprises the following steps: chemical component analysis of raw materials, proportioning calculation, crushing and screening of raw materials, drying, mixing of raw materials, high-temperature heating, cooling, crushing and separation of slag and gold;
chemical composition analysis of raw materials:
the method takes blast furnace dust removal ash, converter slag and iron tailings as raw materials; respectively detecting CaO, MgO and SiO in blast furnace dust, converter slag and iron tailings2、Al2O3、FeO、Fe2O3、MnO、P2O5Fixing carbon by mass percentage;
and (3) ingredient calculation:
the final slag alkalinity of the cement mixture is [ CaO/SiO ]2；（CaO+ MgO）/（SiO2+ Al2O3) Taking the fixed carbon quality of the mixture as a material proportioning basis; the following formula is satisfied:
MCaO/MSiO2=0.5 to 1.3 (one)
Wherein: mCaO-the quality of the final slag calcium oxide; mMgOThe quality of the magnesium oxide in the final slag; mSiO2The quality of the final slag silicon dioxide; mAl2O3-final slag alumina quality;
Wherein: mc-mix fixed carbon mass; mFe2O3-mass of mixed iron oxide; mFeO-the quality of the ferrous oxide of the mixture; mP2O5-the quality of the mixed material phosphorus pentoxide; mMnO-quality of mixed material manganese oxide;
high-temperature heating:
the heating temperature is not lower than 1450 ℃ in a non-oxidizing atmosphere environment, and the heat preservation time is not lower than 20 minutes.
2. The method for preparing a cement mixture by using converter slag according to claim 1, wherein the blast furnace dust removal ash, the converter slag and the iron tailings have a particle size of less than 1mm, are more than 70% by mass, and have a water content of less than 2% by mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810462307.1A CN108609875B (en) | 2018-05-15 | 2018-05-15 | Method for preparing cement mixture by using converter slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810462307.1A CN108609875B (en) | 2018-05-15 | 2018-05-15 | Method for preparing cement mixture by using converter slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108609875A CN108609875A (en) | 2018-10-02 |
| CN108609875B true CN108609875B (en) | 2020-09-29 |
Family
ID=63663254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810462307.1A Active CN108609875B (en) | 2018-05-15 | 2018-05-15 | Method for preparing cement mixture by using converter slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108609875B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723761B (en) * | 2021-01-28 | 2023-01-10 | 天津水泥工业设计研究院有限公司 | Full-solid waste modifier for reduction and reconstruction of molten steel slag, modification process and product |
| CN113480260B (en) * | 2021-07-21 | 2022-09-16 | 鞍钢股份有限公司 | High-strength nano solid waste concrete prepared by using iron oxide hollow spheres and method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU409898B2 (en) * | 1965-11-18 | 1971-01-29 | The Colonial Sugar Refining Company Limited | Improvements relating tothe manufacture of calcium silicate hydrate products |
| CN1004546B (en) * | 1987-02-13 | 1989-06-21 | 本溪钢铁公司 | Utilize high reactivity bessemer furnace slag to produce the method for ferric-cement |
| RU2029749C1 (en) * | 1992-01-22 | 1995-02-27 | Общество с ограниченной ответственностью - Малое предприятие "Патент-Приз" | Method to produce binder of low water consumption |
| RU2207995C2 (en) * | 2001-06-21 | 2003-07-10 | Юдович Борис Эммануилович | Method of manufacturing low water-demand cement |
| CN101671133B (en) * | 2009-09-30 | 2012-03-21 | 永州市中大特种水泥有限责任公司 | Modified low-alkalinity sulphoaluminate cement |
| CN103880310B (en) * | 2014-02-20 | 2016-05-18 | 辽宁石化职业技术学院 | A kind of portland slag cement and production method thereof |
| CN107604157B (en) * | 2017-08-25 | 2019-03-22 | 鞍钢股份有限公司 | Method for preparing iron-carbon composite briquette for blast furnace by utilizing thermal-state converter slag |
| CN107601924A (en) * | 2017-09-25 | 2018-01-19 | 中国葛洲坝集团水泥有限公司 | A kind of modified portland cement clinker and preparation method thereof |
| CN107663589A (en) * | 2017-10-10 | 2018-02-06 | 东北大学 | A kind of method by the nickeliferous mixing slag recovery valuable component with iron |
-
2018
- 2018-05-15 CN CN201810462307.1A patent/CN108609875B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108609875A (en) | 2018-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101280361B (en) | Process method of tailings in vanadium extraction | |
| CN102796879B (en) | Method for preparing chromium-containing iron powder by direct reduction of calcium-free chromium slag | |
| CN108658483B (en) | Method for preparing auxiliary cementing material by reducing and recycling iron and secondary slag through steel slag | |
| CN101240375B (en) | Iron sinter efflorescence-resisting agent and producing method thereof | |
| Jiang et al. | Formation of spinel phases in oxidized BOF slag under different cooling conditions | |
| CN1718554A (en) | Treatment method of vanadium containing converter steel slag | |
| CN110055370A (en) | A kind of new type high temperature steel slag modification agent and modified pretreating process | |
| CN103103310A (en) | Vanadium extraction cold pressing block and preparation method and applications thereof and vanadium extraction method | |
| CN108609875B (en) | Method for preparing cement mixture by using converter slag | |
| CN115505745B (en) | Method for treating dust removal ash in sintering process by utilizing steel slag thermal coupling technology | |
| CN111977997A (en) | Control method for realizing steel slag reduction modification, water-quenched slag and application thereof | |
| JP5191861B2 (en) | Manufacturing method of slag for cement raw material | |
| CN115679097A (en) | Method for recycling iron-making gas ash by using converter slag and refined dedusting ash | |
| CN109081321A (en) | A kind of method of converter dephosphorization slag preparing phosphoric acid iron | |
| JP5531536B2 (en) | Method for recovering iron and phosphorus from steelmaking slag | |
| CA2907991C (en) | Method for processing steel slag and hydraulic mineral binder | |
| CN109665817A (en) | A kind of metallurgical slag resource comprehensive utilization method | |
| CN108642231B (en) | Converter slag modifier and method for preparing low-alkalinity slag system by using same | |
| CN112375856A (en) | Method for improving iron content of converter slag and nickel slag and/or copper slag by melt coupling modification | |
| CN108558244B (en) | Device and method for preparing cement mixture by utilizing thermal state converter slag | |
| CN114292040B (en) | Reduction hardening and tempering agent and application thereof in steel slag treatment | |
| CN105219972A (en) | A kind of method utilizing high-carbon content flyash to reclaim iron in slag | |
| JP2019172547A (en) | Manufacturing method of phosphoric acid fertilizer, and phosphoric acid fertilizer | |
| CN114907028A (en) | Steel slag modifier and method for modifying converter steel slag | |
| CN112624070B (en) | Full utilization method of steel 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |