CN101693384B - Method of utilizing Pb-Zn tailings for preparing B05 grade self-energy-saving aerated concrete - Google Patents
Method of utilizing Pb-Zn tailings for preparing B05 grade self-energy-saving aerated concrete Download PDFInfo
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- CN101693384B CN101693384B CN2009102723339A CN200910272333A CN101693384B CN 101693384 B CN101693384 B CN 101693384B CN 2009102723339 A CN2009102723339 A CN 2009102723339A CN 200910272333 A CN200910272333 A CN 200910272333A CN 101693384 B CN101693384 B CN 101693384B
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Classifications
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a method for preparing aerated concrete, in particular to a method of utilizing Pb-Zn tailings for preparing B05 grade self-energy-saving aerated concrete, which is characterized by comprising the following steps: firstly, preparing raw materials, secondly, selecting raw materials, wherein the selection of raw materials comprises the following steps: firstly, selecting dry materials, Pb-Zn tailings powder is 50-65%, cement is18-25%, calcium lime is 14-23% and calcium sulfate is 3-5% according to the quality percentage, aluminum powder is 0.10%-0.14% of the gross mass of Pb-Zn tailings powder, cement, calcium lime and calcium sulfate, additive is 0.07-0.09% of gross mass of Pb-Zn tailings powder, cement, calcium lime and calcium sulfate, and Pb-Zn tailings powder, cement, calcium lime, calcium sulfate, aluminum powder and additive are chosen, thirdly, evenly mixing Pb-Zn tailings powder, cement, calcium lime, calcium sulfate and additive, then, dissolving aluminum powder in to 40-45 DEG C of water, adding aluminum powder liquid to stir 1-2min in dry mixing material, and getting slip, fourthly, pouring, fifthly, curing and getting aerated concrete. The solidwaste Pb-Zn tailings of the method have high utilization ratio and is environment-friendly.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of preparation method of air entrained concrete.
Background technology
At present, China's built house has more than 400 hundred million m
2, wherein the urban architecture gross area is about 13,800,000,000 m
2About, what can reach building energy-saving standard only accounts for 5%, and all the other ubiquities problems such as building enclosure heat insulation property and poor air-tightness, all belong to the highly energy-consuming building.Body of wall is the important component part of architectural exterior-protecting construction, and the heat consumption of exterior wall accounts for 35%～45% of residential architecture total amount of heat loss.Air entrained concrete is subjected to people's attention again as a kind of light wall material.
With code of building design in 1981, every square metre of heating area heating season consumption standard coal 25Kg is 100%, 1998 come into effect energy-conservation 50% design standard, every square metre of heating energy consumption is reduced to below the 12.5Kg, and energy-conservation compulsory standard and requirement more than 50% launched in the whole nation up to now.Traditional power save mode is to adopt composite exterior wall heat preservation energy-saving system, and this system is in the outside of exterior wall or the inboard is provided with the insulation layer.It is (425～525) Kg/M that air entrained concrete is done apparent density
3, be called the B05 level.
Tradition air entrained concrete production method has three kinds by the raw material branch: cement-flyash-lime air entrained concrete, cement-sand-lime air entrained concrete and cement-slag-sand aerated concrete.Nowadays flyash has obtained using widely in building material as admixture, therefore produces air entrained concrete later on fewer and feweri with flyash as raw material, and powder ash air-entrained concrete also exists weatherability difference and easy problems of crack.River sand is difficult to be widely used as the natural resources of preciousness simultaneously.And the treated mine tailing that obtains of metal mine is a kind of good resource, and mine tailing has that composition is uniform and stable, particle is tiny, be rich in SiO
2And Al
2O
3Etc. characteristics.
China's Pb-Zn tailings and smeltery thereof distribute very wide, and the waste sludge discharge amount is bigger, need take a large amount of farmlands as stacking the place, and harmful leachable wherein also can polluted source.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, this method solid waste Pb-Zn tailings utilization rate height.
To achieve these goals, technical scheme of the present invention is: utilize the method for Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, it is characterized in that it comprises the steps:
1) preparation of raw material: chemical composition SiO in the Pb-Zn tailings
2Content is 60～75% (mass content); Tail over 10～15% to 0.08mm with Pb-Zn tailings is levigate, and the powder that different batches is levigate mixes, deposited 2～3 days, obtain the Pb-Zn tailings powder that homogenizing is handled;
2) choosing of raw material: 1. choosing of dry material: dry material is made up of Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; Gross mass percentage by Pb-Zn tailings powder, cement, quick lime, the shared Pb-Zn tailings powder of each raw material of gypsum, cement, quick lime and gypsum is: Pb-Zn tailings powder 50～65%, cement 18～25%, quick lime 14～23%, gypsum 3～5%; Aluminium powder is 0.10%～0.14% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Additive is 0.07～0.09% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Choose Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; 2. the mass ratio by water and dry material is 0.50～0.60, chooses water;
3) earlier Pb-Zn tailings powder, cement, quick lime, gypsum and additive are mixed, obtain dry blend; Aluminium powder is dissolved in 40～45 ℃ of water then, obtain aluminium powder liquid; Add aluminium powder liquid in the dry blend and stir 1～2min, get slip;
4) slip casting that stirs is gone into die trial, in 40～45 ℃ of thermostatic curings, the quiet 2.5h of stopping～3.5h gets angry;
5) high temperature saturated vapor steam press maintenance in the still kettle is sent in cutting back form removal then, gets air entrained concrete.
Described cement is 32.5 Portland cements or 42.5 Portland cements.In the described quick lime more than the effective CaO content 70% (quality).Described aluminium powder is a foaming agent.
Described additive is the mixture of lignosulfonates and spaonin powder, and the mass ratio of lignosulfonates and spaonin powder is 92: 8.Additive brings into play diminishing in system, protect mould, the effect of stabilise bubbles.
Described high temperature saturated vapor steam press maintenance is: 0.8～1.5MPa, 170～198 ℃ of high temperature saturated vapors are depressed, heating-up time 2～4h, constant temperature time 6～10h, temperature fall time 2～3h.
Described homogenizing is treated to: the powder that different batches is levigate mixes, and need deposit 2～3 days, obtains test Pb-Zn tailings powder.
Determining of technological parameter of the present invention:
1) determining of the levigate fineness of Pb-Zn tailings: the levigate fineness of Pb-Zn tailings influences the performance of its reactivity, performance impact to the stability of slip and aerated concrete products is bigger: when the Pb-Zn tailings particle diameter is too small (0.08mm tails over less than 10%), ratio of water to material is big, air entrained concrete intensity is not high, and the mould that easily collapses; Otherwise, if Pb-Zn tailings particle diameter excessive (0.08mm tails over greater than 15%), the mixed slurry layering of easily emanating, and be unfavorable for getting angry.The present invention determines to tail over 10～15% to 0.08mm with Pb-Zn tailings is levigate;
2) determining of ratio of water to material: ratio of water to material is the important parameter of aerated concrete products pouring stability, and the denseness and the multiviscosisty speed of slip is had material impact, and the present invention determines that ratio of water to material is controlled at 0.50～0.60;
3) get angry the determining of temperature, aluminium powder and admixture dosage: the slip casting temperature is suitable for normally getting angry of slip when being controlled at 40～45 ℃.Aluminium powder incorporation (accounting for the gross mass ratio of Pb-Zn tailings, cement, quick lime and gypsum) is 0.10%～0.14%; Admixture dosage (accounting for the gross mass ratio of Pb-Zn tailings, cement, quick lime and gypsum) is 0.07～0.09%.
Utilize solid waste Pb-Zn tailings to replace traditional production steam-pressing aero-concrete siliceous material flyash, sand etc. to prepare autoclave aerated concrete building block as siliceous material, but both contaminated solution problem, can avoid exhaustive exploitation river sand to environment damage again, economic benefit is also considerable; Under the situation that current air entrained concrete lacks day by day with fly ash, to utilize discarded Pb-Zn tailings resource to produce air entrained concrete and have remarkable economical, ecological benefits, development prospect is wide.Therefore produce air entrained concrete with Pb-Zn tailings, make it to get utilization, not only sharp useless, environmental protection, and have remarkable economic efficiency and social benefit, it is of far-reaching significance and great.
It is (425～525) Kg/M that the B05 grade self-energy-saving aerated concrete of the present invention's preparation is done apparent density
3(promptly doing grade of apparent density is the lightweight aerated concrete of B05 level), the energy-saving effect of this grade air entrained concrete self body of wall can reach energy-conservation standard (being called from energy-conservation) more than 50%.
The invention has the beneficial effects as follows: the shared mass percent of Pb-Zn tailings powder is 50～65%, solid waste Pb-Zn tailings utilization rate height; Raw material sources are wide, turn waste into wealth environmental protection; Every performance of air entrained concrete of preparation index that the certified products that require require that is up to state standards.
The specific embodiment
In order to understand the present invention better, below embodiment further illustrate content of the present invention, but content of the present invention not only is confined to the following examples:
Embodiment 1:
Utilize the method for Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, it comprises the steps:
1) preparation of raw material: chemical composition SiO in the Pb-Zn tailings
2Content is 62% (mass content), originates to be Suichang, Zhejiang gold mine Co., Ltd; The powder that different batches is levigate mixes, and deposits 2～3 days, obtains the Pb-Zn tailings powder that homogenizing is handled, and surveying that its fineness 0.08mm tails over is 14%;
Cement: adopt the new 42.5 grades of Portland cements of China;
Quick lime: adopt Wuhan to build building material Co., Ltd morning quick lime is provided, levigate screen over-size 13% to 4900 hole sizers, the content of free calcium oxide is 72%, digestion time 10～20min belongs to middling speed digestion lime;
Gypsum: adopt Wuhan to build the gypsum that building material Co., Ltd provides morning, the screen over-size of its 4900 hole sizer is 14%;
Foaming agent: aluminium powder cream, Co., Ltd provides by sea, Wuhan connection building material;
Described additive is the mixture of sodium lignin sulfonate and spaonin powder, and the mass ratio of sodium lignin sulfonate and spaonin powder is 92: 8; Additive brings into play diminishing in system, protect mould, the effect of stabilise bubbles;
2) choosing of raw material: 1. choosing of dry material: dry material is made up of Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; Gross mass percentage by Pb-Zn tailings powder, cement, quick lime, the shared Pb-Zn tailings powder of each raw material of gypsum, cement, quick lime and gypsum is: Pb-Zn tailings powder 53%, cement 22%, quick lime 20%, gypsum 5%; Aluminium powder is 0.12% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass, and additive is 0.09% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass, chooses Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; 2. the mass ratio by water and dry material is 0.55, chooses water;
3) earlier Pb-Zn tailings powder, cement, quick lime, gypsum and additive are mixed, obtain dry blend; Aluminium powder is dissolved in 42 ℃ of water then, obtain aluminium powder liquid; Add aluminium powder liquid in the dry blend and stir 1min, get slip;
4) slip casting that stirs is gone into die trial, in 45 ℃ of thermostatic curings, the quiet 3h of stopping gets angry;
5) high temperature saturated vapor steam press maintenance in the still kettle is sent in cutting back form removal then, and described high temperature saturated vapor steam press maintenance is: 1MPa, 180 ℃ of high temperature saturated vapors are depressed, heating-up time 3h, constant temperature time 8h, temperature fall time 3h; Get air entrained concrete.
The Pb-Zn tailings B05 grade self-energy-saving aerated concrete test result such as the table 1 of preparation:
Table 1
The durability test result such as the table 2 of B05 grade self-energy-saving aerated concrete:
Table 2
The B05 grade self-energy-saving aerated concrete that utilizes Pb-Zn tailings preparation after testing, the certified products index that every performance is up to state standards and requires.Thermal conductivity factor from table 2 can find out that the air entrained concrete energy-saving effect of preparation is good.
Embodiment 2:
Utilize the method for Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, it comprises the steps:
1) preparation of raw material: chemical composition SiO in the Pb-Zn tailings
2Content is 60% (mass content); The source is Suichang, Zhejiang gold mine Co., Ltd; The powder that different batches is levigate mixes, and deposits 2～3 days, obtains the Pb-Zn tailings powder that homogenizing is handled, and surveying that its fineness 0.08mm tails over is 10%;
2) choosing of raw material: 1. choosing of dry material: dry material is made up of Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; Gross mass percentage by Pb-Zn tailings powder, cement, quick lime, the shared Pb-Zn tailings powder of each raw material of gypsum, cement, quick lime and gypsum is: Pb-Zn tailings powder 50%, cement 25%, quick lime 22%, gypsum 3%; Aluminium powder is 0.10% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Additive is 0.07% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Choose Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; 2. the mass ratio by water and dry material is 0.50, chooses water;
Described cement is 32.5 Portland cements; Effective CaO content 71% (quality) in the described quick lime; Described aluminium powder is a foaming agent;
Described additive is the mixture of calcium lignosulfonate and spaonin powder, and the mass ratio of calcium lignosulfonate and spaonin powder is 92: 8; Additive brings into play diminishing in system, protect mould, the effect of stabilise bubbles;
3) earlier Pb-Zn tailings powder, cement, quick lime, gypsum and additive are mixed, obtain dry blend; Aluminium powder is dissolved in 40 ℃ of water then, obtain aluminium powder liquid; Add aluminium powder liquid in the dry blend and stir 1min, get slip;
4) slip casting that stirs is gone into die trial, in 40 ℃ of thermostatic curings, the quiet 2.5h of stopping gets angry;
5) high temperature saturated vapor steam press maintenance in the still kettle is sent in cutting back form removal then, and described high temperature saturated vapor steam press maintenance is: 0.8MPa, 170 ℃ of high temperature saturated vapors are depressed, heating-up time 2h, constant temperature time 6h, temperature fall time 2h; Get air entrained concrete.
The B05 grade self-energy-saving aerated concrete that utilizes Pb-Zn tailings preparation after testing, the certified products index that every performance is up to state standards and requires.And the thermal conductivity factor of the air entrained concrete of preparation is similar to the result in the table 2, and energy-saving effect is good.
Embodiment 3:
Utilize the method for Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, it comprises the steps:
1) preparation of raw material: chemical composition SiO in the Pb-Zn tailings
2Content is 75% (mass content); The source is Suichang, Zhejiang gold mine Co., Ltd; The powder that different batches is levigate mixes, and deposits 2～3 days, obtains the Pb-Zn tailings powder that homogenizing is handled, and surveying that its fineness 0.08mm tails over is 15%;
2) choosing of raw material: 1. choosing of dry material: dry material is made up of Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; Gross mass percentage by Pb-Zn tailings powder, cement, quick lime, the shared Pb-Zn tailings powder of each raw material of gypsum, cement, quick lime and gypsum is: Pb-Zn tailings powder 65%, cement 18%, quick lime 14%, gypsum 3%; Aluminium powder is 0.14% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Additive is 0.09% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Choose Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; 2. the mass ratio by water and dry material is 0.60, chooses water;
Described cement is 42.5 Portland cements; Effective CaO content 78% (quality) in the described quick lime; Described aluminium powder is a foaming agent;
Described additive is the mixture of magnesium lignosulfonate and spaonin powder, and the mass ratio of magnesium lignosulfonate and spaonin powder is 92: 8; Additive brings into play diminishing in system, protect mould, the effect of stabilise bubbles;
3) earlier Pb-Zn tailings powder, cement, quick lime, gypsum and additive are mixed, obtain dry blend; Aluminium powder is dissolved in 45 ℃ of water then, obtain aluminium powder liquid; Add aluminium powder liquid in the dry blend and stir 2min, get slip;
4) slip casting that stirs is gone into die trial, in 45 ℃ of thermostatic curings, the quiet 3.5h of stopping gets angry;
5) high temperature saturated vapor steam press maintenance in the still kettle is sent in cutting back form removal then, and described high temperature saturated vapor steam press maintenance is: 1.5MPa, 198 ℃ of high temperature saturated vapors are depressed, heating-up time 4h, constant temperature time 10h, temperature fall time 3h; Get air entrained concrete.
The B05 grade self-energy-saving aerated concrete that utilizes Pb-Zn tailings preparation after testing, the certified products index that every performance is up to state standards and requires.And the thermal conductivity factor of the air entrained concrete of preparation is similar to the result in the table 2, and energy-saving effect is good.
Embodiment 4:
Utilize the method for Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, it comprises the steps:
1) preparation of raw material: chemical composition SiO in the Pb-Zn tailings
2Content is 70% (mass content); The source is Suichang, Zhejiang gold mine Co., Ltd; The powder that different batches is levigate mixes, and deposits 2-3 days, obtains the Pb-Zn tailings powder that homogenizing is handled, and surveying that its fineness 0.08mm tails over is 14%;
2) choosing of raw material: 1. choosing of dry material: dry material is made up of Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; Gross mass percentage by Pb-Zn tailings powder, cement, quick lime, the shared Pb-Zn tailings powder of each raw material of gypsum, cement, quick lime and gypsum is: Pb-Zn tailings powder 52%, cement 20%, quick lime 23%, gypsum 5%; Aluminium powder is 0.12% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Additive is 0.08% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Choose Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; 2. the mass ratio by water and dry material is 0.55, chooses water;
Described cement is 42.5 Portland cements; Effective CaO content 80% (quality) in the described quick lime; Described aluminium powder is a foaming agent;
Described additive is the mixture of calcium lignosulfonate (or magnesium lignosulfonate) and spaonin powder, and calcium lignosulfonate (or magnesium lignosulfonate) is 92: 8 with the mass ratio of spaonin powder; Additive brings into play diminishing in system, protect mould, the effect of stabilise bubbles;
3) earlier Pb-Zn tailings powder, cement, quick lime, gypsum and additive are mixed, obtain dry blend; Aluminium powder is dissolved in 42 ℃ of water then, obtain aluminium powder liquid; Add aluminium powder liquid in the dry blend and stir 2min, get slip;
4) slip casting that stirs is gone into die trial, in 42 ℃ of thermostatic curings, the quiet 3.0h of stopping gets angry;
5) high temperature saturated vapor steam press maintenance in the still kettle is sent in cutting back form removal then, and described high temperature saturated vapor steam press maintenance is: 1.1MPa, 184 ℃ of high temperature saturated vapors are depressed, heating-up time 3h, constant temperature time 8h, temperature fall time 2.5h; Get air entrained concrete.
The B05 grade self-energy-saving aerated concrete that utilizes Pb-Zn tailings preparation after testing, the certified products index that every performance is up to state standards and requires.And the thermal conductivity factor of the air entrained concrete of preparation is similar to the result in the table 2, and energy-saving effect is good.
The bound of each raw material of the present invention, interval value can both realize the present invention, do not enumerate embodiment one by one at this; Bound, the interval value of each technological parameter of the present invention (as temperature, time etc.) can both realize the present invention, do not enumerate embodiment one by one at this.
Claims (5)
1. utilize the method for Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete, it is characterized in that it comprises the steps:
1) preparation of raw material: chemical composition SiO in the Pb-Zn tailings
2Content is 60～75% (quality); Tail over 10～15% to 0.08mm with Pb-Zn tailings is levigate, and the powder that different batches is levigate mixes, deposited 2～3 days, obtain the Pb-Zn tailings powder that homogenizing is handled;
2) choosing of raw material: 1. choosing of dry material: dry material is made up of Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; Gross mass percentage by Pb-Zn tailings powder, cement, quick lime, the shared Pb-Zn tailings powder of each raw material of gypsum, cement, quick lime and gypsum is: Pb-Zn tailings powder 50～65%, cement 18～25%, quick lime 14～23%, gypsum 3～5%; Aluminium powder is 0.10%～0.14% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Additive is 0.07～0.09% of Pb-Zn tailings powder, cement, quick lime and a gypsum gross mass; Choose Pb-Zn tailings powder, cement, quick lime, gypsum, aluminium powder and additive; 2. the mass ratio by water and dry material is 0.50～0.60, chooses water;
3) earlier Pb-Zn tailings powder, cement, quick lime, gypsum and additive are mixed, obtain dry blend; Aluminium powder is dissolved in 40～45 ℃ of water then, obtain aluminium powder liquid; Add aluminium powder liquid in the dry blend and stir 1～2min, get slip;
4) slip casting that stirs is gone into die trial, in 40～45 ℃ of thermostatic curings, the quiet 2.5h of stopping～3.5h gets angry;
5) high temperature saturated vapor steam press maintenance in the still kettle is sent in cutting back form removal then, gets air entrained concrete.
2. the method for utilizing Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete according to claim 1 is characterized in that: described cement is 32.5 Portland cements or 42.5 Portland cements.
3. the method for utilizing Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete according to claim 1 is characterized in that: in the described quick lime more than the effective CaO content 70% (quality).
4. the method for utilizing Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete according to claim 1 is characterized in that: described additive is the mixture of lignosulfonates and spaonin powder, and the mass ratio of lignosulfonates and spaonin powder is 92: 8.
5. the method for utilizing Pb-Zn tailings for preparing B 05 grade self-energy-saving air entrained concrete according to claim 1, it is characterized in that: described high temperature saturated vapor steam press maintenance is: 0.8～1.5MPa, 170～198 ℃ of high temperature saturated vapors are depressed, heating-up time 2～4h, constant temperature time 6～10h, temperature fall time 2～3h.
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| CN110882836B (en) * | 2019-11-05 | 2021-10-12 | 水口山有色金属有限责任公司 | Method for reducing magnesium content in lead-zinc tailings |
| CN110882835B (en) * | 2019-11-05 | 2021-10-12 | 水口山有色金属有限责任公司 | Method for increasing silicon content in lead-zinc tailings |
| CN112608048A (en) * | 2020-12-18 | 2021-04-06 | 张建华 | Metal tailing cementing material and preparation method and application thereof |
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| CN1056594C (en) * | 1996-12-23 | 2000-09-20 | 同济大学 | Batch for high performance concrete and process thereof |
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| CN1792985A (en) * | 2005-12-23 | 2006-06-28 | 武汉理工大学 | Gypsum mine plastering material and preparation process thereof |
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| CN1069573C (en) * | 1995-12-22 | 2001-08-15 | 美国石膏公司 | Method for preparing foamed gypsum product |
| CN1056594C (en) * | 1996-12-23 | 2000-09-20 | 同济大学 | Batch for high performance concrete and process thereof |
| CN1315301A (en) * | 2000-03-31 | 2001-10-03 | 成县加气混凝土制品厂 | Aerocrete made of industrially desulfurized Pb-Zn tailings and its production technology |
| CN1792985A (en) * | 2005-12-23 | 2006-06-28 | 武汉理工大学 | Gypsum mine plastering material and preparation process thereof |
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