CN111704374B - Composite tailing cementing material and preparation method and application thereof - Google Patents
Composite tailing cementing material and preparation method and application thereof Download PDFInfo
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- CN111704374B CN111704374B CN202010517402.4A CN202010517402A CN111704374B CN 111704374 B CN111704374 B CN 111704374B CN 202010517402 A CN202010517402 A CN 202010517402A CN 111704374 B CN111704374 B CN 111704374B
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- 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
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
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- 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
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- 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
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
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- 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
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- 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
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- 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
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Abstract
The invention provides a composite tailing cementing material and a preparation method and application thereof. The composite tailing cementing material is prepared from steel slag, iron-selecting waste of cyanidation slag, copper slag, aerated concrete waste, quicklime, desulfurized ash, NaOH and Na2SiO3And waste stone powder. The preparation method comprises the steps of crushing, drying and grinding the copper slag; drying and grinding the aerated concrete waste, then calcining at high temperature, and cooling; drying and grinding the desulfurized ash; drying and grinding the waste stone powder; the materials, steel slag and cyaniding slag iron-selecting waste, quicklime, NaOH and Na2SiO3Mixing the materials in proportion, and then placing the mixture into a vibration stirrer to be uniformly stirred to obtain the composite tailing cementing material. The invention can effectively utilize the iron selection waste of the steel slag and the cyanide slag, the aerated concrete waste and the copper slag, realize the change of waste into valuable, greatly reduce the environmental pollution and realize great economic benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a composite tailing cementing material and a preparation method and application thereof.
Background
The waste iron selecting material of steel slag and cyanidation slag is the residue left after the iron powder is magnetically separated in the steel slag and cyanidation slag. The waste residue is ground to 400-800 m2And/kg, the solid waste is recycled, and the green sustainable development is realized.
The copper slag is copper smelting slag. Besides a large amount of copper, the copper smelting slag also contains various valuable metals such as Fe, Zn, Pb, Co, Ni and the like and a small amount of noble metals such as Au, Ag and the like. About 1.9 hundred million tons of slag are accumulated in China, and most of slag yards are stockpiled. In the rest unused reserves, more lean ores and less rich ores, more small and medium-sized ores and less large-sized ores, high mining and selecting difficulty and high production cost. The comprehensive utilization of industrial waste residues (such as copper residues) by cement enterprises is not only a requirement for economic sustainable development, but also a requirement for reducing cost, improving cement performance and gaining market.
The chemical components of the aerated concrete waste and the copper slag mainly comprise SiO2FeO, CaO, etc. The aerocrete waste and the copper tailings are high in storage amount and low in price. The combination of the gelatinization as the main raw material replaces Portland cement and is used as a mineral admixture.
How to use steel slag and cyanide slag iron selection waste, aerated concrete waste and copper slag in the production of cementing materials changes waste into valuable, greatly reduces environmental pollution, and can realize great economic benefit and social benefit, and the technical problem is urgently solved for people.
Disclosure of Invention
The invention provides a composite tailing cementing material and a preparation method and application thereof, which can effectively utilize steel slag and cyaniding slag iron selection waste, aerated concrete waste and copper slag, change waste into valuable, greatly reduce environmental pollution and realize great economic benefit and social benefit.
The invention relates to a composite tailing cementing materialIron-selecting waste, copper slag, aerated concrete waste, quicklime, desulfurized ash slag, NaOH and Na from steel slag and cyanide slag2SiO3And waste stone powder.
Optionally, the composite tailings cementing material is composed of the following substances in parts by mass:
40-80 parts of steel slag and cyaniding slag iron selection waste, 10-40 parts of aerated concrete waste, 10-20 parts of copper slag, 10-14 parts of quick lime, 6-10 parts of desulfurized ash, 1-2 parts of NaOH and Na2SiO30.75-1.25, and 0.5 of waste stone powder.
The invention also comprises a preparation method of the composite tailing cementing material, which comprises the following steps:
s1, crushing and drying the copper slag, and grinding the copper slag to be less than 0.08 mm; drying and grinding the aerated concrete waste to be less than 0.08mm, then calcining at high temperature, and naturally cooling; drying desulfurized ash, and grinding to be less than 0.08 mm; drying and grinding the waste stone powder to be less than 0.08 mm;
s2, selecting iron scrap, quick lime, NaOH and Na from the materials obtained in the step S1, steel slag and cyaniding slag2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material.
Optionally, the calcination temperature of the aerated concrete waste in the step S1 is 300-500 ℃, and the high-temperature calcination time is 1-3 h; the copper slag is crushed to be less than 2 mm.
Optionally, the mass ratio of the steel slag, the iron-selecting waste of the cyaniding slag, the aerated concrete waste and the copper slag in the step S2 is 8:1: 1-4: 4: 2.
Optionally, the drying temperature of the copper slag, the aerated concrete waste, the desulfurized ash and the waste stone powder in the step S1 is 80-110 ℃, and the drying is carried out until the water content is less than 0.1%; the grinding time is 1.5-2.5 h;
optionally, in the step S1, the desulfurized ash is ground by using a vibrating ball mill, and the copper slag, the aerated concrete waste and the waste rock powder are ground by using a cement mill of type SM Φ 500mm × 500 mm.
Optionally, the iron separation waste ratio of the steel slag and the cyaniding slag in the step S2The surface area is 400-800 m2/kg。
Optionally, the chemical composition of the aerated concrete waste is as follows by mass percent: SiO 22 35～60％，CaO 20～45％，Al2O3 3～8％，Fe2O3 3～6％，FeO 2～7％，MgO 2～6％，Na2O 0.01～1％，K2O 0.01～1％，SO20.01-3%, the loss on ignition is 0.01-2%, and the others are 0.01-3%.
Optionally, the chemical components of the copper slag are as follows by mass percent: SiO 22 50～70％，Al2O3 5～15％，Fe2O31～8％，TiO2 0.01～2％，CaO 1～8％，MgO 1～6％，Na2O 0.01～3％，K2O 0.01～3％，SO30.01-5%, loss on ignition 0.01-5%, and others 0.01-2%.
Optionally, the steel slag and the iron-selecting cyanide slag waste comprise the following chemical components in percentage by mass: SiO 2250-65%, CaO 15-30%, Al2O31-5%, MgO 2-4%, Fe2O31-10%, loss on ignition 0-0.3%, and others 1-10%.
Optionally, the desulfurization ash comprises the following chemical components in percentage by mass: SiO 22 1～5％，SO3 30～60％，CaO 25～60％，Al2O3 1～5％，Fe2O3 0.01～3％，MgO 0.01～2％，Na2O 0.01～0.5％，K20.01-2% of O, 0.01-2% of loss on ignition and 0.01-3% of others.
Optionally, the chemical components of the waste stone powder are, by mass: SO (SO)30.01～1％、Al2O3 1～15％、Fe2O3 0.01～5％、TiO2 0.01～2％、CaO 20～50％、MgO 1～3％、SiO225-50%, MnO 0.01-2%, loss on ignition 10-30%, and others 0.01-3%.
The invention also comprises the application of the composite tailing cementing material in cement, and the composite tailing cementing material is mixed with portland cement to prepare the composite slag cement.
Optionally, the mass ratio of the composite slag cementing material to the portland cement is 1: 9-3: 7.
In the invention, the steel slag, the iron-selecting waste of the cyaniding slag and the aerated concrete waste are subjected to mechanical grinding and high-temperature calcination to generate a large amount of broken Si-O chemical bonds, so that the specific surface area is increased, the surface energy is strengthened, the content of soluble silicon is increased, and the steel slag, the iron-selecting waste of the cyaniding slag and the aerated concrete waste have strong potential gelling activity. The compound tailings cementing material generates baseball-shaped ettringite as a basic skeleton in the hydration process. SiO in amorphous state2As the gelling filler, the steel slag and the iron-selecting waste of the cyaniding slag, the aerated concrete waste and the copper tailing particles which do not react exist in a system together as the solid filler. The ettringite crystals are mutually inserted and overlapped together and connected with C-S-H together when the composite cementitious material is hydrated, and the basic structure of the composite cementitious material hardened body is formed together. Wherein, the mechanical property characteristics of the system are influenced by ettringite. The gel substance in an amorphous state is continuously filled into the gaps of the system, so that the structure of the system becomes more compact. The hydration product calcium silicate gel (C-S-H) and the ettringite crystal are mutually filled and bonded, which is the result of forming a compact hardened body by the composite cementing material, and the mechanical property of the composite cementing material is the excellent performance on the macroscopic scale. Therefore, the various tailings have better mutual synergistic effect in the hydration reaction process. In addition, a vibration ball mill and a vibration stirrer are adopted in the process, so that Ca and S in the desulfurization ash are fully dispersed, and the water requirement of the system and the expansibility of hardened slurry are reduced. The invention reduces the consumption of cement, reduces carbon emission, and is energy-saving and environment-friendly.
Compared with the prior art, the invention can obtain the following technical effects:
1) the preparation method of the composite slag cementing material is simple and feasible, the cementing material is produced by utilizing the composite slag, the large-scale utilization of the iron selection waste materials of the steel slag and the cyanide slag, the aerated concrete waste materials and the copper slag can be realized, and the additional values of the iron selection waste materials of the steel slag and the cyanide slag, the aerated concrete waste materials and the copper slag are greatly improved.
2) The invention has wide source of the required raw materials and low price, and the activated composite tailings are used as the admixture of the cement admixture, thereby reducing the production cost of the cement.
3) The activation method adopted by the invention can effectively improve the activity of the iron selection waste, the aerated concrete waste and the copper slag of the steel slag and the cyanide slag, and has the advantages of simple process, low equipment requirement and convenient operation.
4) The composite slag cementing material prepared by the invention can be used for preparing cement with different grades according to requirements, and the quality of the cement can be ensured.
Drawings
FIG. 1 is a process flow diagram of a composite tailings cementitious material and a method of making composite slag cement of the present invention.
Detailed Description
The following embodiments are described in detail with reference to the accompanying drawings, so that how to implement the technical features of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented.
The invention discloses a composite tailing cementing material which is prepared from the following substances in parts by mass:
40-80 parts of steel slag and cyaniding slag iron selection waste, 10-40 parts of aerated concrete waste, 10-20 parts of copper slag, 10-14 parts of quick lime, 6-10 parts of desulfurized ash, 1-2 parts of NaOH, and Na2SiO30.75-1.25, and 0.5 of waste stone powder.
The invention also comprises a preparation method of the composite tailing cementing material, which comprises the following steps:
step 1, crushing copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by using a ball mill, then calcining the waste at the high temperature of 300-500 ℃ for 1-3 h, and naturally cooling the waste; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone powder and then grinding the waste stone powder to be less than 0.08mm by using a ball mill; the drying temperature is 80-110 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
Step 2, the product obtained in the step 1Iron selection waste material of the material, steel slag and cyaniding slag (the specific surface area is 400-800 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag to the iron-selecting waste of the cyanide slag to the total amount of the aerated concrete waste to the copper slag is 8:1: 1-4: 4: 2.
The invention also discloses an application of the composite tailing cementing material in preparation of composite slag cement, which comprises the following steps: and mixing the composite tailing cementing material and portland cement to prepare the composite slag cement, wherein the mass ratio of the composite tailing cementing material to the portland cement is 1: 9-3: 7.
Example 1
The composite tailing cementing material is composed of the following substances in parts by mass:
80 parts of steel slag and cyaniding slag iron selection waste, 10 parts of aerated concrete waste, 10 parts of copper slag, 10 parts of quick lime, 6 parts of desulfurized ash, 1 parts of NaOH and Na2SiO30.75, and 0.5 of waste stone powder.
The preparation method of the composite tailing cementing material comprises the following steps:
crushing the copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by adopting a ball mill, then placing the waste at the high temperature of 300 ℃ for calcining for 1h, and naturally cooling; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone and then grinding the waste stone to be less than 0.08mm by using a ball mill; the drying temperature is 80 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
The materials are mixed with steel slag and cyaniding slag iron selection waste materials (the specific surface area is 400 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag is 8:1: 1.
The composite slag cementing material obtained in the embodiment is mixed with P.I 42.5 portland cement in the mixing amount of 10%, 20% and 30%, and a cement mortar test block is prepared and the compressive strength is detected according to the international standard GB/T17671-1999 cement mortar strength test method (ISO method).
Example 2
The composite tailing cementing material is composed of the following substances in parts by mass:
70 parts of steel slag and cyaniding slag iron selection waste, 20 parts of aerated concrete waste, 10 parts of copper slag, 12 parts of quicklime, 8 parts of desulfurized ash, 1.5 parts of NaOH1 and Na2SiO31. 0.5 of waste stone powder.
The preparation method of the composite tailing cementing material comprises the following steps:
crushing the copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by adopting a ball mill, then placing the waste at the high temperature of 500 ℃ for calcining for 2h, and naturally cooling; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone and then grinding the waste stone to be less than 0.08mm by using a ball mill; the drying temperature is 80 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
The materials are mixed with steel slag and cyaniding slag iron selection waste materials (the specific surface area is 500 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag is 7:2: 1.
The composite slag cementing material obtained in the embodiment is mixed with P.I 42.5 portland cement in the mixing amount of 10%, 20% and 30%, and a cement mortar test block is prepared and the compressive strength is detected according to the international standard GB/T17671-1999 cement mortar strength test method (ISO method).
Example 3
The composite tailing cementing material is composed of the following substances in parts by mass:
60 parts of iron selection waste of steel slag and cyanidation slag and air entrainment25 parts of concrete waste, 15 parts of copper slag, 14 parts of quicklime, 6 parts of desulfurized ash, NaOH 2 and Na2SiO31.25 and 0.5 of waste stone powder.
The preparation method of the composite tailing cementing material comprises the following steps:
crushing the copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by adopting a ball mill, then placing the waste at the high temperature of 450 ℃ for calcining for 2h, and naturally cooling; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone and then grinding the waste stone to be less than 0.08mm by using a ball mill; the drying temperature is 80 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
The materials are mixed with steel slag and cyaniding slag iron selection waste materials (the specific surface area is 400 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag is 6:2.5: 1.5.
In the implementation, the aerated concrete waste comprises the following chemical components in percentage by mass: SiO 22 35～60％，CaO 20～45％，Al2O3 3～8％，Fe2O3 3～6％，FeO 2～7％，MgO 2～6％，Na2O 0.01～1％，K2O 0.01～1％，SO20.01-3%, the loss on ignition is 0.01-2%, and the others are 0.01-3%.
The copper slag comprises the following chemical components in percentage by mass: SiO 22 50～70％，Al2O3 5～15％，Fe2O3 1～8％，TiO2 0.01～2％，CaO 1～8％，MgO 1～6％，Na2O 0.01～3％，K2O 0.01～3％，SO30.01-5%, loss on ignition 0.01-5%, and others 0.01-2%.
The steel slag and the iron-selecting waste of the cyaniding slag comprise the following chemical components in percentage by mass: SiO 2250 to 65 percent of CaO, 15 to E30％，Al2O31-5%, MgO 2-4%, Fe2O31-10%, loss on ignition 0-0.3%, and others 1-10%.
The desulfurization ash comprises the following chemical components in percentage by mass: SiO 22 1～5％，SO3 30～60％，CaO 25～60％，Al2O3 1～5％，Fe2O3 0.01～3％，MgO 0.01～2％，Na2O 0.01～0.5％，K20.01-2% of O, 0.01-2% of loss on ignition and 0.01-3% of others.
The waste stone powder comprises the following chemical components in percentage by mass: SO (SO)30.01～1％、Al2O3 1～15％、Fe2O30.01～5％、TiO2 0.01～2％、CaO 20～50％、MgO 1～3％、SiO225-50%, MnO 0.01-2%, loss on ignition 10-30%, and others 0.01-3%.
The composite slag cementing material obtained in the embodiment is mixed with P.I 42.5 portland cement in the mixing amount of 10%, 20% and 30%, and a cement mortar test block is prepared and the compressive strength is detected according to the international standard GB/T17671-1999 cement mortar strength test method (ISO method).
Example 4
The composite tailing cementing material is composed of the following substances in parts by mass:
60 of steel slag and cyaniding slag iron selection waste, 20 of aerated concrete waste, 20 of copper slag, 14 of quick lime, 10 of desulfurized ash, 1 of NaOH and Na2SiO31. 0.5 of waste stone powder.
The preparation method of the composite tailing cementing material comprises the following steps:
crushing the copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by adopting a ball mill, then placing the waste at the high temperature of 500 ℃ for calcining for 1.5h, and naturally cooling; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone and then grinding the waste stone to be less than 0.08mm by using a ball mill; the drying temperature is 80 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
The materials are mixed with steel slag and cyaniding slag iron selection waste materials (the specific surface area is 600 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag is 3:1: 1.
The composite slag cementing material obtained in the embodiment is mixed with P.I 42.5 portland cement in the mixing amount of 10%, 20% and 30%, and a cement mortar test block is prepared and the compressive strength is detected according to the international standard GB/T17671-1999 cement mortar strength test method (ISO method).
Example 5
The composite tailing cementing material is composed of the following substances in parts by mass:
40 parts of steel slag and cyaniding slag iron selection waste, 40 parts of aerated concrete waste, 20 parts of copper slag, 13 parts of quicklime, 7 parts of desulfurized ash, 1.2 parts of NaOH and Na2SiO30.9, and 0.5 of waste stone powder.
The preparation method of the composite tailing cementing material comprises the following steps:
crushing the copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by adopting a ball mill, then placing the waste at the high temperature of 500 ℃ for calcining for 1.5h, and naturally cooling; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone and then grinding the waste stone to be less than 0.08mm by using a ball mill; the drying temperature is 80 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
The materials are mixed with steel slag and cyaniding slag iron selection waste materials (the specific surface area is 700 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag is 2:2: 1.
The composite slag cementing material obtained in the embodiment is mixed with P.I 42.5 portland cement in the mixing amount of 10%, 20% and 30%, and a cement mortar test block is prepared and the compressive strength is detected according to the international standard GB/T17671-1999 cement mortar strength test method (ISO method).
Example 6
The composite tailing cementing material is composed of the following substances in parts by mass:
50 parts of steel slag and cyaniding slag iron selection waste, 30 parts of aerated concrete waste, 20 parts of copper slag, 11 parts of quick lime, 9 parts of desulfurized ash, 1.8 parts of NaOH and Na2SiO31.1 and 0.5 of waste stone powder.
The preparation method of the composite tailing cementing material comprises the following steps:
crushing the copper slag to be less than 2mm by using a jaw crusher, drying, and then grinding to be less than 0.08mm by using a ball mill; drying the undisturbed aerated concrete waste, grinding the waste to be less than 0.08mm by adopting a ball mill, then placing the waste at the high temperature of 500 ℃ for calcining for 1.5h, and naturally cooling; after being dried, the desulfurized ash is ground to be less than 0.08mm by a vibration ball mill; drying the waste stone and then grinding the waste stone to be less than 0.08mm by using a ball mill; the drying temperature is 80 ℃, and the drying is carried out until the water content is less than 0.1%; the pulverizer is an SM phi 500mm multiplied by 500mm type cement mill.
The materials are mixed with steel slag and cyaniding slag iron selection waste materials (the specific surface area is 800 m)2Per kg), quicklime, NaOH, Na2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material. The mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag is 5:3: 2.
In the implementation, the aerated concrete waste comprises the following chemical components in percentage by mass: SiO 22 35～60％，CaO 20～45％，Al2O3 3～8％，Fe2O3 3～6％，FeO 2～7％，MgO 2～6％，Na2O 0.01～1％，K2O 0.01～1％，SO20.01-3%, the loss on ignition is 0.01-2%, and the others are 0.01-3%.
Of copper slagThe chemical components by mass percent are as follows: SiO 22 50～70％，Al2O3 5～15％，Fe2O3 1～8％，TiO2 0.01～2％，CaO 1～8％，MgO 1～6％，Na2O 0.01～3％，K2O 0.01～3％，SO30.01-5%, loss on ignition 0.01-5%, and others 0.01-2%.
The steel slag and the iron-selecting waste of the cyaniding slag comprise the following chemical components in percentage by mass: SiO 2250-65%, CaO 15-30%, Al2O31-5%, MgO 2-4%, Fe2O31-10%, loss on ignition 0-0.3%, and others 1-10%.
The desulfurization ash comprises the following chemical components in percentage by mass: SiO 22 1～5％，SO3 30～60％，CaO 25～60％，Al2O3 1～5％，Fe2O3 0.01～3％，MgO 0.01～2％，Na2O 0.01～0.5％，K20.01-2% of O, 0.01-2% of loss on ignition and 0.01-3% of others.
The waste stone powder comprises the following chemical components in percentage by mass: SO (SO)30.01～1％、Al2O3 1～15％、Fe2O30.01～5％、TiO2 0.01～2％、CaO 20～50％、MgO 1～3％、SiO225-50%, MnO 0.01-2%, loss on ignition 10-30%, and others 0.01-3%.
The composite slag cementing material obtained in the embodiment is mixed with P.I 42.5 portland cement in the mixing amount of 10%, 20% and 30%, and a cement mortar test block is prepared and the compressive strength is detected according to the international standard GB/T17671-1999 cement mortar strength test method (ISO method).
The mortar test pieces prepared in examples 1-6 were subjected to standard curing for 28 days, and the test results are shown in the following table:
strength Performance index of mortar test pieces described in examples 1 to 6
From examples 1 to 6, it can be seen that: the composite tailing cementing material is prepared from steel slag, iron-selecting waste of cyanide slag, aerated concrete waste and copper slag, can be used for cement, and has better compressive strength than national standard.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements, etc. made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The composite tailing cementing material is characterized by comprising the following substances in parts by mass: 40-80 parts of steel slag and cyaniding slag iron selection waste, 10-40 parts of aerated concrete waste, 10-20 parts of copper slag, 10-14 parts of quick lime, 6-10 parts of desulfurized ash, 1-2 parts of NaOH and Na2SiO30.75-1.25 parts of waste stone powder; the preparation method of the composite tailing cementing material comprises the following steps:
s1, crushing and drying the copper slag, and grinding the copper slag to be less than 0.08 mm; drying and grinding the aerated concrete waste to be less than 0.08mm, then calcining at high temperature, and naturally cooling; drying desulfurized ash, and grinding to be less than 0.08 mm; drying and grinding the waste stone powder to be less than 0.08 mm;
s2, selecting iron scrap, quick lime, NaOH and Na from the materials obtained in the step S1, steel slag and cyaniding slag2SiO3Mixing the materials in proportion, then placing the mixture in a vibration stirrer, and uniformly stirring to obtain the composite tailing cementing material.
2. The composite tailing cementing material of claim 1, wherein the calcination temperature of the aerated concrete waste in the step S1 is 300-500 ℃, and the high-temperature calcination time is 1-3 h; the copper slag is crushed to be less than 2 mm.
3. The composite tailing cementing material of claim 1, wherein the mass ratio of the steel slag, the iron-selecting waste of the cyanidation slag, the aerated concrete waste and the copper slag in the step S2 is 8:1: 1-4: 4: 2.
4. The composite tailing cementing material of claim 1, wherein the drying temperature of the copper slag, the aerated concrete waste, the desulfurized ash and the waste stone powder in the step S1 is 80-110 ℃, and the drying is carried out until the water content is less than 0.1%; the grinding time is 1.5-2.5 h.
5. The composite tailings cementitious material of claim 1, wherein the desulfurized ash in step S1 is ground using a vibratory ball mill, and the copper slag, the aerated concrete waste and the waste rock powder are ground using a type SM Φ 500mm x 500mm cement mill.
6. The composite tailing cementing material according to any one of claims 1 to 5, characterized in that the specific surface area of the waste materials of the steel slag and the iron selection of the cyanidation slag in the step S2 is 400-800 m2/kg。
7. The composite tailing cementing material of any one of claims 1 to 5, characterized in that the chemical composition of the aerated concrete waste is as follows by mass percent: SiO 22 35~60%，CaO 20~45%，Al2O3 3~8%，Fe2O3 3~6%，FeO 2~7%，MgO 2~6%，Na2O 0.01~1%，K2O 0.01~1% ，SO20.01-3%, the ignition loss is 0.01-2%, and the others are 0.01-3%; the copper slag comprises the following chemical components in percentage by mass: SiO 22 50~70%，Al2O3 5~15%，Fe2O3 1~8%，TiO2 0.01~2%，CaO 1~8%，MgO 1~6%，Na2O 0.01~3%，K2O 0.01~3%，SO3 0.01-5%, loss on ignition 0.01-5%, and others 0.01-2%; the steel slag and the iron-selecting waste of the cyaniding slag comprise the following chemical components in percentage by mass: SiO 2250-65%, CaO 15-30%, Al2O31-5%, MgO 2-4%, Fe2O31-10%, loss on ignition 0-0.3%, and others 1-10%; the chemical components of the desulfurization ash are as followsThe mass percentage is as follows: SiO 22 1~5%，SO3 30~60%，CaO 25~60%，Al2O3 1~5%，Fe2O3 0.01~3%，MgO 0.01~2%，Na2O 0.01~0.5%，K20.01-2% of O, 0.01-2% of loss on ignition and 0.01-3% of others; the waste stone powder comprises the following chemical components in percentage by mass: SO (SO)30.01~1%、Al2O3 1~15%、Fe2O3 0.01~5%、TiO2 0.01~2%、 CaO 20~50%、MgO 1~3%、SiO225-50%, MnO 0.01-2%, loss on ignition 10-30%, and others 0.01-3%.
8. The application of the composite tailing cementing material in cement according to claim 1, wherein the composite tailing cementing material is mixed with portland cement to prepare composite slag cement; the mass ratio of the composite slag cementing material to the portland cement is 1: 9-3: 7.
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