CN115159998A - Refractory silica brick and method for preparing refractory silica brick by using copper slag - Google Patents
Refractory silica brick and method for preparing refractory silica brick by using copper slag Download PDFInfo
- Publication number
- CN115159998A CN115159998A CN202210783494.XA CN202210783494A CN115159998A CN 115159998 A CN115159998 A CN 115159998A CN 202210783494 A CN202210783494 A CN 202210783494A CN 115159998 A CN115159998 A CN 115159998A
- Authority
- CN
- China
- Prior art keywords
- copper slag
- silica
- silica brick
- magnetic separation
- preparing
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 142
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 58
- 239000010949 copper Substances 0.000 title claims abstract description 58
- 239000002893 slag Substances 0.000 title claims abstract description 58
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 56
- 239000011449 brick Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007885 magnetic separation Methods 0.000 claims abstract description 52
- 238000011084 recovery Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 9
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 229910052840 fayalite Inorganic materials 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 claims abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 3
- 239000004571 lime Substances 0.000 claims abstract description 3
- 239000008267 milk Substances 0.000 claims abstract description 3
- 210000004080 milk Anatomy 0.000 claims abstract description 3
- 235000013336 milk Nutrition 0.000 claims abstract description 3
- 230000001737 promoting effect Effects 0.000 claims abstract description 3
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 47
- 239000002245 particle Substances 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 239000010453 quartz Substances 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 239000000571 coke Substances 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910004283 SiO 4 Inorganic materials 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
-
- 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
-
- 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
-
- 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
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a refractory silica brick and a method for preparing the refractory silica brick by using copper slag. The specific method comprises the following steps: roasting the copper slag added with the additive in a reducing atmosphere, grinding the roasted copper slag, and magnetically separating the obtained copper slag powder to obtain a magnetic recovery material and magnetic separation tailings; the additive is used for promoting the decomposition of fayalite; 55-75 wt% of silica particles, 17-36 wt% of magnetic separation tailings, 3-7 wt% of silica micropowder and 2-6 wt% of lime milk are used as raw materials, 1-5 wt% of sulfurous acid paper pulp waste liquid is added to the raw materials, and the raw materials are mixed, pressed and formed, and the temperature is kept at 1350-1450 ℃ for 7-12 h to prepare the silica brick. The magnetic separation tailings serving as fine powder are added into silica brick raw materials to prepare the silica bricks, the tailings still contain part of Fe elements and CaO, and the tailings serving as a mineralizer at high temperature promotes the conversion of quartz to tridymite and cristobalite, so that the strength of the silica bricks is improved.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a refractory silica brick and a method for preparing the refractory silica brick by using copper slag.
Background
The copper slag is slag generated in copper smelting process, belongs to one of non-ferrous metal slag, and is mainly iron olivine (containing 90% of Fe) 2 SiO 4 ) And secondly magnetite, vitreous and sulphide. China is a large consumption country of copper ore resources, and the recovery difficulty of useful resources is large due to the complex components of copper slag with large output. At present, the mode of treating the copper slag is mainly landfill, and part of the mode is used for producing cement, but the landfill not only can cause land space waste and environmental pollution, but also can lead a large amount of valuable metals and precious metals to be accumulated. Meanwhile, cement is only used as a mineralizer, and the use amount is limited. Therefore, if the copper slag is buried or used as a mineralizer for cement production, the problem of utilization of the copper slag cannot be effectively solved.
Although there are many existing methods for recovering iron element from copper slag, and many methods are mature, basically all methods do not utilize the treated tailings, the iron element accounts for about 30 wt% of the copper slag, and the tailings with 70 wt% of the iron element are also valuable.
Disclosure of Invention
The invention aims to provide a method for comprehensively recovering Fe resources and tailings except Fe in copper slag and preparing refractory silica bricks by using the copper slag, aiming at the defects in the prior art.
The invention discloses a method for preparing a refractory silica brick by using copper slag, which comprises the following specific steps:
firstly, roasting the copper slag added with the additive in a reducing atmosphere for 60-90 min; grinding the roasted copper slag until the particle size is not more than 0.074mm, and carrying out magnetic separation on the obtained copper slag powder to obtain a magnetic recovery material and magnetic separation tailings; the additive is used for promoting fayalite decomposition;
55-75 wt% of silica particles, 17-36 wt% of magnetic separation tailings, 3-7 wt% of silicon micropowder and 2-6 wt% of lime milk are taken as raw materials, 1-5 wt% of sulfurous acid pulp waste liquor is added into the raw materials, and the raw materials are mixed, pressed and formed, and the temperature is kept at 1350-1450 ℃ for 7-12 h to prepare the silica brick.
Further, siO of the silica particles 2 The content is more than or equal to 98wt%; the silica particles have a gradation of:
the silica particles having a particle diameter of less than 3mm and not less than 1mm account for 35 to 55wt%,
the silica particles having a particle diameter of not less than 1mm and not less than 0.088mm account for 20 to 32wt%.
Further, the additive is calcium hydroxide or a mixture of calcium hydroxide and sodium bicarbonate.
Furthermore, the recovery rate of iron in the magnetic recovery material is more than 90%, and the grade of iron is more than 80%.
Furthermore, the reduction roasting temperature is 1000-1400 ℃.
Further, the cooled copper slag is ground to be less than or equal to 0.074mm.
Further, the strength of the magnetic separation copper slag is 60-120 kA/m.
The refractory silica brick is characterized by being prepared by the method for preparing the refractory silica brick by using the copper slag.
Compared with the prior art, the invention has the following excellent effects:
(1) The invention firstly utilizes the additive to promote Fe 2 SiO 4 Decomposing Fe and SiO in reducing atmosphere at 1000-1400 deg.C 2 And then carrying out magnetic separation on the copper slag, realizing the recovery of Fe, and simultaneously reducing the Fe content in the tailings so as to greatly use the magnetic separation tailings. Not only a large amount of Fe resources in the copper slag are recovered, but also the residual tailings are efficiently utilized, and the comprehensive resource recycling is realized.
(2) The magnetic separation tailings serving as fine powder are added into silica brick raw materials to prepare silica bricks, the tailings still contain part of Fe elements and CaO, and the tailings serving as a mineralizer at high temperature promotes the conversion of quartz to tridymite and cristobalite, so that the strength of the silica bricks is improved. Under the condition that the accumulation amount of the copper slag is increased day by day, the method not only consumes the solid waste copper slag, but also reduces the treatment cost of the copper slag.
In conclusion, the invention ensures that the recovery rate of iron in copper slag is high, the normal-temperature breaking strength of the silica brick prepared by using the tailings is 60-100 MPa, which is twice that of the common silica brick, the refractoriness under load is 1620-1650 ℃, which is superior to the common silica brick, the normal-temperature performance of the silica brick is greatly improved by adding the magnetic separation tailings as silica brick fine powder, and the high-temperature performance is also improved. Therefore, the invention has the characteristics of energy saving, environmental protection and low production cost.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
In order to avoid repetition, the raw materials and process parameters related to this specific embodiment are uniformly described as follows, and are not described in detail in the embodiments:
the additive added into the copper slag to promote the decomposition of the fayalite is calcium hydroxide or a mixture of the calcium hydroxide and sodium bicarbonate.
And the grinding time of the roasted copper slag is 6-8 h.
The crucible for placing the copper slag is one of a graphite crucible, a corundum crucible and a magnesium crucible.
The reduction roasting temperature is 1000-1400 ℃.
And grinding the cooled copper slag to be less than or equal to 0.074mm.
The strength of the magnetic separation copper slag is 60-120 kA/m.
The mineralizer is one or two of calcium oxide, calcium hydroxide and ferric oxide.
The technical solution of the present invention will be further described with reference to the following specific examples.
Example 1: first 10% of Ca (OH) 2 And adding 12% of coke into the copper slag, uniformly mixing, roasting at 1100 ℃ for 60-90 min under a reducing atmosphere, carrying out magnetic separation at the intensity of 60-120 kA/m, and carrying out magnetic separation to obtain a magnetic substance and magnetic separation tailings. Mixing and grinding 15-25 parts by mass of silica particles with the particle size of 3-1 mm, 40-50 parts by mass of silica particles with the particle size of 0.088-1 mm, a mineralizer, 30 parts by mass of magnetic separation tailings and 0-5 parts by mass of silicon micropowder, ageing the mixture, and pressing the mixture into a mold under the condition of 100-200 MPaKeeping the temperature at 1400-1450 ℃ for 15-20 hours, and cooling to obtain the silica brick.
The recovery rate of iron obtained by magnetic separation in the embodiment 1 is 95.32%, and the prepared silica brick has the apparent porosity of 18-22% and the compressive strength of 68-90 MPa after being dried at 110 ℃; the softening starting temperature is 1620-1630 ℃ under the load of 0.2 MPa.
Example 2: first 10% of Ca (OH) 2 And adding 12% of coke into the copper slag, uniformly mixing, roasting at 1300 ℃ in a reducing atmosphere for 60-90 min, carrying out magnetic separation at the strength of 60-120 kA/m, and carrying out magnetic separation to obtain a magnetic substance and magnetic separation tailings. Mixing and grinding 15-25 parts by mass of silica particles with the particle size of 3-1 mm, 40-50 parts by mass of silica particles with the particle size of 0.088-1 mm, a mineralizer, 40 parts by mass of magnetic separation tailings and 0-5 parts by mass of silicon micropowder, pressing and molding under the condition of 100-200 MPa after ageing mixture, preserving heat for 15-20 hours at the temperature of 1400-1450 ℃, and cooling to obtain the silica brick.
The recovery rate of iron obtained by magnetic separation in the embodiment 2 is 90.49%, and the prepared silica brick is detected; after being dried at 110 ℃, the apparent porosity is 18 to 22 percent, and the compressive strength is 70 to 85MPa; the softening starting temperature under load of 0.2MPa is 1622-1635 ℃.
Example 3: first 10% NaHCO 3 And adding 12% of coke into the copper slag, uniformly mixing, roasting at 1100 ℃ in a reducing atmosphere for 60-90 min, carrying out magnetic separation at the strength of 60-120 kA/m, and carrying out magnetic separation to obtain a magnetic substance and magnetic separation tailings. Mixing and grinding 15-25 parts by mass of silica particles with the particle size of 3-1 mm, 40-50 parts by mass of silica particles with the particle size of 0.088-1 mm, a mineralizer, 30 parts by mass of magnetic separation tailings and 0-5 parts by mass of silicon micropowder, pressing and molding under the condition of 100-200 MPa after ageing mixture, preserving heat for 15-20 hours at the temperature of 1400-1450 ℃, and cooling to obtain the silica brick.
The recovery rate of iron obtained by magnetic separation in the embodiment 3 is 91.8%, and the prepared silica brick is detected; after being dried at 110 ℃, the apparent porosity is 18 to 22 percent, and the compressive strength is 66 to 76MPa; the softening starting temperature under load of 0.2MPa is 1622-1631 ℃.
Example 4: first 10% NaHCO 3 And 12% coke addition toAnd uniformly mixing the copper slag, roasting for 60-90 min at 1200 ℃ in a reducing atmosphere, carrying out magnetic separation at the intensity of 60-120 kA/m, and carrying out magnetic separation to obtain a magnetic substance and magnetic separation tailings. Mixing and grinding 15-25 parts by mass of silica particles with the particle size of 3-1 mm, 40-50 parts by mass of silica particles with the particle size of 0.088-1 mm, a mineralizer, 40 parts by mass of magnetic separation tailings and 0-5 parts by mass of silicon micropowder, pressing and molding under the condition of 100-200 MPa after ageing, preserving heat for 15-20 hours at the temperature of 1400-1450 ℃, and cooling to obtain the silica brick.
The recovery rate of Fe obtained by magnetic separation in the embodiment 4 is 92.35%, the prepared silica brick has apparent porosity of 18-22% and compressive strength of 75-90 MPa after being dried at 110 ℃; the softening starting temperature under the load of 0.2MPa is 1620-1628 ℃.
Example 5: first 10% of Ca (OH) 2 And adding 12% of coke into the copper slag, uniformly mixing, roasting at 1200 ℃ in a reducing atmosphere for 60-90 min, carrying out magnetic separation at the strength of 60-120 kA/m, and carrying out magnetic separation to obtain a magnetic substance and magnetic separation tailings. Mixing and grinding 15-25 parts by mass of silica particles with the particle size of 3-1 mm, 40-50 parts by mass of silica particles with the particle size of 0.088-1 mm, a mineralizer, 50 parts by mass of magnetic separation tailings and 0-5 parts by mass of silicon micropowder, pressing and molding under the condition of 100-200 MPa after ageing mixture, preserving heat for 15-20 hours at the temperature of 1400-1450 ℃, and cooling to obtain the silica brick.
The recovery rate of iron obtained by magnetic separation in the example 5 is 90.24%, and the prepared silica brick is inspected; after being dried at 110 ℃, the apparent porosity is 18 to 22 percent, and the compressive strength is 75 to 85MPa; the softening starting temperature under load of 0.2MPa is 1635-1650 ℃.
Example 6: first 10% of Ca (OH) 2 And adding 12% of coke into the copper slag, uniformly mixing, roasting at 1300 ℃ in a reducing atmosphere for 60-90 min, carrying out magnetic separation at the strength of 60-120 kA/m, and carrying out magnetic separation to obtain a magnetic substance and magnetic separation tailings. Mixing and grinding 15-25 parts by mass of silica particles with the particle size of 3-1 mm, 40-50 parts by mass of silica particles with the particle size of 0.088-1 mm, a mineralizer, 50 parts by mass of magnetic separation tailings and 0-5 parts by mass of silicon micropowder, pressing and molding under the condition of 100-200 MPa after ageing, and keeping the temperature at 1400-1450 ℃ to ensure that the mixture is not brokenAnd (5) heating for 15-20 hours, and cooling to obtain the silica brick.
The recovery rate of iron obtained by magnetic separation in the embodiment 6 is 90.55%, and the prepared silica brick has apparent porosity of 18-22% and compressive strength of 69-76 MPa after being dried at 110 ℃; the softening starting temperature under load of 0.2MPa is 1625-1635 ℃.
In the specific embodiment, ca (OH) is added into the copper slag 2 Or Ca (OH) 2 With NaHCO 3 Mixture and coke promoted Fe 2 SiO 4 Decomposition to Fe and CaSiO 3 And iron resources with higher recovery rate can be collected by a magnetic separation mode. The residual magnetic separation tailings contain a large amount of Si elements, the granularity of copper slag powder after magnetic separation is less than or equal to 0.074mm, and a large amount of the copper slag powder can be used as silica fine powder in silica bricks in the same system. A small part of iron elements exist in the magnetic separation tailings, and can replace iron scales in common silica bricks to be used as a mineralizer, so that the use of mineral resources is reduced, the production cost is reduced, and metal resources are recovered. The prepared silica brick has normal temperature pressure resistance and rupture strength twice higher than that of common silica brick, and refractoriness under load within 1620-1650 ℃, and is a refractory material with excellent performance.
Therefore, the method has the advantages of simple process, low production cost, environmental protection and energy conservation, the recovery rate of iron obtained by magnetic separation is 90-98%, and the prepared silica brick is detected as follows: after being dried at 110 ℃, the apparent porosity is 18 to 22 percent, and the compressive strength is 60 to 100MPa; the 0.2MPa refractoriness under load begins at 1620-1650 ℃. The iron recovery rate obtained by magnetic separation is high, and the prepared silica brick has the characteristics of high normal temperature strength and high refractoriness under load.
The above is not relevant and is applicable to the prior art.
While certain specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the foregoing description is for purposes of illustration only and not by way of limitation, and that various modifications, additions and substitutions can be made to the specific embodiments described without departing from the scope of the invention as defined in the accompanying claims. It should be understood by those skilled in the art that any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A method for preparing a refractory silica brick by using copper slag is characterized by comprising the following steps:
firstly, roasting the copper slag added with the additive in a reducing atmosphere for 60-90 min; grinding the roasted copper slag until the particle size is not more than 0.074mm, and carrying out magnetic separation on the obtained copper slag powder to obtain a magnetic recovery object and magnetic separation tailings; the additive is used for promoting the decomposition of fayalite;
55-75 wt% of silica particles, 17-36 wt% of magnetic separation tailings, 3-7 wt% of silica micropowder and 2-6 wt% of lime milk are used as raw materials, 1-5 wt% of sulfurous acid paper pulp waste liquid is added to the raw materials, and the raw materials are mixed, pressed and formed, and the temperature is kept at 1350-1450 ℃ for 7-12 h to prepare the silica brick.
2. The method for preparing refractory silica brick from copper slag according to claim 1, wherein SiO in the silica particles 2 The content is more than or equal to 98wt%; the silica particles have a composition of:
the silica particles having a particle diameter of less than 3mm and not less than 1mm account for 35 to 55wt%,
the silica particles having a particle diameter of not less than 1mm and not less than 0.088mm account for 20 to 32wt% of the silica particles.
3. The method for preparing the refractory silica brick by using the copper slag as claimed in claim 1, wherein the additive is calcium hydroxide or a mixture of the calcium hydroxide and sodium bicarbonate.
4. The method for preparing the refractory silica brick by using the copper slag according to claim 1, wherein the recovery rate of iron in the magnetic recyclate is more than 90 percent, and the grade of iron is more than 80 percent.
5. The method for preparing the refractory silica brick by using the copper slag as claimed in claim 1, wherein the reduction roasting temperature is 1000-1400 ℃.
6. The method for preparing the refractory silica brick by using the copper slag as claimed in claim 1, wherein the cooled copper slag is ground to be less than or equal to 0.074mm.
7. The method for preparing the refractory silica brick by using the copper slag as claimed in claim 1, wherein the strength of the magnetic separation copper slag is 60-120 kA/m.
8. A refractory silica brick, characterized in that it is prepared by the method for preparing refractory silica brick from copper slag according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210783494.XA CN115159998A (en) | 2022-07-05 | 2022-07-05 | Refractory silica brick and method for preparing refractory silica brick by using copper slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210783494.XA CN115159998A (en) | 2022-07-05 | 2022-07-05 | Refractory silica brick and method for preparing refractory silica brick by using copper slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115159998A true CN115159998A (en) | 2022-10-11 |
Family
ID=83491809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210783494.XA Pending CN115159998A (en) | 2022-07-05 | 2022-07-05 | Refractory silica brick and method for preparing refractory silica brick by using copper slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115159998A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006126752A1 (en) * | 2005-03-24 | 2006-11-30 | Geocon Materials.Inc. | A concrete admixture using waste tailing and methode of thereof |
| CN102167606A (en) * | 2011-01-21 | 2011-08-31 | 武汉科技大学 | Silica brick and preparation method thereof |
| CN102994765A (en) * | 2012-12-06 | 2013-03-27 | 北京中冶设备研究设计总院有限公司 | Method for treating waste copper slag |
| CN105039728A (en) * | 2015-08-07 | 2015-11-11 | 北京神雾环境能源科技集团股份有限公司 | Method for treating copper slag |
| CN105271958A (en) * | 2014-06-04 | 2016-01-27 | 北京中冶设备研究设计总院有限公司 | Method for producing aerated concrete by using water quenching copper tailings being subjected to copper selection iron extraction |
| CN107954645A (en) * | 2017-12-12 | 2018-04-24 | 江苏省冶金设计院有限公司 | A kind of preparation method of tailings steam-pressing brisk |
| CN108046630A (en) * | 2017-12-26 | 2018-05-18 | 江苏省冶金设计院有限公司 | It is a kind of using copper ashes magnetic separation slag and coal ash for manufacturing for the method for sintering-expanded haydite |
| CN112695205A (en) * | 2020-12-16 | 2021-04-23 | 鹰潭盛发铜业有限公司 | Method for environment-friendly resource utilization of copper smelting slag |
-
2022
- 2022-07-05 CN CN202210783494.XA patent/CN115159998A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006126752A1 (en) * | 2005-03-24 | 2006-11-30 | Geocon Materials.Inc. | A concrete admixture using waste tailing and methode of thereof |
| CN102167606A (en) * | 2011-01-21 | 2011-08-31 | 武汉科技大学 | Silica brick and preparation method thereof |
| CN102994765A (en) * | 2012-12-06 | 2013-03-27 | 北京中冶设备研究设计总院有限公司 | Method for treating waste copper slag |
| CN105271958A (en) * | 2014-06-04 | 2016-01-27 | 北京中冶设备研究设计总院有限公司 | Method for producing aerated concrete by using water quenching copper tailings being subjected to copper selection iron extraction |
| CN105039728A (en) * | 2015-08-07 | 2015-11-11 | 北京神雾环境能源科技集团股份有限公司 | Method for treating copper slag |
| CN107954645A (en) * | 2017-12-12 | 2018-04-24 | 江苏省冶金设计院有限公司 | A kind of preparation method of tailings steam-pressing brisk |
| CN108046630A (en) * | 2017-12-26 | 2018-05-18 | 江苏省冶金设计院有限公司 | It is a kind of using copper ashes magnetic separation slag and coal ash for manufacturing for the method for sintering-expanded haydite |
| CN112695205A (en) * | 2020-12-16 | 2021-04-23 | 鹰潭盛发铜业有限公司 | Method for environment-friendly resource utilization of copper smelting slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108658483B (en) | Method for preparing auxiliary cementing material by reducing and recycling iron and secondary slag through steel slag | |
| CN103614547B (en) | Method for separating iron, aluminum and silicon from diasporic bauxite | |
| CN108147443B (en) | Method for extracting aluminum oxide from fly ash and preparing ferro-silicon alloy | |
| CN109880999B (en) | Method for recovering iron in copper slag after modification of composite additive and application | |
| CN109055720B (en) | A method of iron powder is prepared based on the modified copper ashes with cryogenic vulcanization reduction of alkaline process | |
| CN112662896B (en) | Method for preparing titanium-rich material from titanium ore | |
| CN101824503B (en) | Method for producing vanadiferous pigiron by adopting vanadiferous converter steel slag | |
| CN103030312B (en) | Treatment method of magnesium metal smelting waste slag | |
| CN111893308A (en) | Method for comprehensively utilizing red mud without tailings | |
| CN103642962A (en) | Treatment method of vanadium extraction tailings | |
| CN103396138B (en) | Novel converter magnesia carbon brick and preparation method thereof | |
| CN113215394B (en) | Treatment method of stone coal | |
| CN112210634B (en) | Method and device for preparing nickel-molybdenum-iron alloy from low-grade nickel-molybdenum ore | |
| 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 | |
| CN110436492B (en) | Method for comprehensively utilizing low-grade aluminum resources | |
| CN109929995B (en) | Aluminum ash pellet binder and preparation method thereof | |
| CN115159998A (en) | Refractory silica brick and method for preparing refractory silica brick by using copper slag | |
| CN112551921B (en) | Carbonization activation beneficiation technology for high-silicon magnesite | |
| CN112322903B (en) | Method for reducing magnesium oxide in nickel-iron slag and method for preparing mineral wool | |
| CN110511052B (en) | Foamed ceramic produced by using tailings of steel plant and preparation method thereof | |
| CN107032806A (en) | One kind produces converter body brick and preparation method thereof using black magnesia | |
| CN113105131A (en) | Method for purifying ash by comprehensively utilizing calcium carbide | |
| CN108998605B (en) | Method for separating and recycling steel slag by adopting slag and iron in thermal state | |
| CN113562771A (en) | Full-quantization integral utilization method for recycling iron, sodium and tailings from Bayer process red mud step by step |
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: 20221011 |