CN104944880B - Low-silica iron ore tailing non-autoclave block with good hydrolytic resistance and preparation method - Google Patents
Low-silica iron ore tailing non-autoclave block with good hydrolytic resistance and preparation method Download PDFInfo
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- CN104944880B CN104944880B CN201510332088.1A CN201510332088A CN104944880B CN 104944880 B CN104944880 B CN 104944880B CN 201510332088 A CN201510332088 A CN 201510332088A CN 104944880 B CN104944880 B CN 104944880B
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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
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- 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
A low-silica iron ore tailing non-autoclave block with good hydrolytic resistance comprises the following raw materials by weight percent: for making building material bricks, 70-75% of iron ore tailing fine powder and 25-30% of a curing agent; for making solidified blocks for filling, 85-90% of iron ore tailing fine powder and 10-15% of a curing agent, wherein the content of iron ore tailing fine powder with the particle size being 88 micron or below in the whole iron ore tailing fine powder is not lower than 70%; stearic acid solution or sodium stearate solution and triethanolamine. The preparation method comprises the following steps: concentrating low-silica iron ore tailing pulp; mixing the concentrated low-silica iron ore tailing pulp with the curing agent according to the contents, and spraying stearic acid solution or sodium stearate solution and triethanolamine at the same time; ageing; carrying out roll grinding; pressurizing for formation; maintaining for use. According to the preparation method, not only roasting and autoclaved curing are avoided, but also cement is not used, so that environmental pollution is avoided; as for the building material bricks, the compressive strength is not lower than 28 MPa, and the softening coefficient is not lower than 0.85; as for the solidified blocks for filling, the compressive strength and the compressive strength in a water absorption saturation condition are not lower than 9.5 MPa and 6.5 MPa respectively.
Description
Technical field
The present invention relates to one kind building or mine filling material and preparation method, specifically belong to a kind of Low-silica iron ore tailings and exempt from
Block and preparation method are steamed, is definitely a kind of non-evaporating piece of the excellent Low-silica iron ore tailings of water resistance and preparation method.
Background technology
Iron tailings is iron ore remaining solid waste after choosing iron ore concentrate.It is rapid with China's steel and iron industry
Development, the yield of iron ore is continuously increased, and the mine tailing of iron ore factory discharge is more and more, shows according to relevant information, national iron ore
Nearly 300,000,000 t of the annual tailing disposal in mountain ore dressing plant, and comprehensive utilization ratio does not reach 20%.The discharge and disposal of iron tailings, are always resistance
Hinder the bottleneck factor of China's mining development.Disposal mine tailing not only ties up a large amount of soils, and harm environment and safety, main performance
：（1）Mine tailing granularity is small, bulk density is big, easily flow and leakage of collapsing when stacking, destruction vegetation；（2）Tailings are pushed away strong wind
Flown upward everywhere under dynamic, cause soil pollution, land deterioration and dust content of air increase；（3）Mine tailing composition and residual beneficiation reagent
Environmental destruction is aggravated, crops, the surface water and underground water source is contaminated.（4）Mine tailing storage is stored up in the presence of safety
Hidden danger, and take substantial amounts of land resource.
Underground mining makes ground generate subsidence area, and mine tailing is directly discharged into subsidence area, and muddy water can enter minery, to underground
Production brings and has a strong impact on；Earth's surface subsidence area is filled after tailing solidifying, down-hole mining production is neither influenceed, also can routinely be solved
Certainly Tailings Disposal problem, tailing solidifying filling earth's surface subsidence area is the new technology of Tailings Disposal.Cured block water resistance is influence tail
The topmost factor of ore deposit cured block performance, the water resistance for improving tailing solidifying block advantageously reduces hardener dose, reduces production
Cost.
China forbade producing, using and selling solid clay brick in 30 days June in 2003, and advocated research use industry
Waste material is used as building material.Production of construction materials has certain requirement to silicone content in raw material, and silicone content is lower, bigger using difficulty.
Raw material granularity is thinner, and gel material content is bigger, and production cost is higher.So, using the low silicon tailings production building materials of particulate, technology
Difficulty is very big.
At present, in the art, though preparing non-evaporating brick or filling cured block using iron tailings, its curing agent is still adopted
Use cement.The production of cement hardener is needed by pyroprocess, consumption of calorie, and to environmental danger.It is solid using cement
Agent, curing rate is fast, although simple, but production cost is higher.Such as it is through retrieving Chinese Patent Application No.
201010610408.2 document, " a kind of Baking-free and steaming-free tailing brick and preparation method thereof ", Chinese Patent Application No. disclosed in it
It is 201110203216.4 patent document, Chinese Patent Application No. is 201010622991.9 document, Chinese patent application
Number for 91106276.9 document, the document that Chinese Patent Application No. is 201310331006.2, Chinese Patent Application No. be
200910272609.3 document, still makees curing agent using cement；Additionally, the paper for being retrieved similarly employs water
Mud makees curing agent.
There is clinker mineral in cement, easily solidified by hydration reaction under normal temperature curing condition.From principle, use
Cement prepares tailing-bricks and can be realized under the conditions of non-evaporating, unburned as curing agent；By increasing hardener dose, optimizing raw material level
With with the means such as curing condition, easily realize the technical requirements such as water resistance, frost resistance.
A large amount of solid waste, such as flyash are produced in hot industry production, with potential reactivity, can be prepared
Into non-clinker mineral Binder Materials, tailing solidifying agent is made instead of cement with this, with low cost, the advantage such as energy-conserving and environment-protective.It is non-ripe
Material mineral curing agent is different from cement hardener, and its hydration reaction is slow, it is necessary to take activity excitation technology；Even so,
Hydration reaction speed can not still be compared with cement.Under the conditions of non-evaporating, unburned, tailing-bricks are prepared using non-cement hardener, must
Product is set to reach national technical standard in curing time that must be limited in factory；At this moment, the water resistance of tailing-bricks and freeze proof is improved
Property just turn into the technical bottleneck that must pull against.It is reported that, prepare tailing solidifying block, cured block compression strength using non-cement hardener
12.4MPa and 3.4MPa is respectively with water suction saturation compression strength, product coefficient of softing is only 0.27.
To improve the water resistance of plastering, some researchs add waterproof material (such as metallic soap, drip in Gypsum slurry
Green grass or young crops, stearic acid, resin etc.), the gypsum inner particle surface of hardening is formed waterproof layer;Or arrived using injection of material of surging
On gypsum hardenite surface, or hydrophobic material is applied on plastering, its surface is formed water-repellent layer.Above-mentioned 2 kinds of technical measures
There is preferable effect to the short-term waterproof of gypsum so that the h water absorption rates of plastering 2 are only 3 %~6 %, but it is long-term anti-
Water effect is undesirable, and its 24 h water absorption rate is general still more than 10%.Gypsum is air hardening cementitious materials, addition waterproofing agent every
Exhausted moisture, the influence to product strength is smaller.And, generally as building and ornament materials, its gelling property compares the hydraulicity to gypsum
Material-cement wants much weaker, it is impossible to for solidifying mine tailing to prepare non-evaporating piece of mine tailing.More importantly, clinker mineral gelling material
Material is hydraulic cementing materials as cement, entirely different with gypsum, and hydration reaction needs water, uses for reference and improves plastering
The technological thought of water resistance, it is most likely that produce a contrary effect, hydrophober isolation water may suppress hydration reaction, reduce mine tailing
Non-evaporating piece of mechanical property.
Underground mining causes surface subsidence, ore dressing to produce a large amount of mine tailings, and cost of disposal is very high.The direct filling earth's surface of Tailings Slurry
Subsidence area can make a large amount of mud penetrate into underground and influence underground mining to produce, and earth's surface subsidence area is filled after tailing solidifying can then be solved
Certainly problem above.Non- clinker mineral Binder Materials is prepared using solid waste, and solidifies mine tailing as curing agent, prepared
Non-evaporating piece of the mine tailing of different mechanical properties, is respectively used to filling earth's surface subsidence area, makees construction material, then not only possible change give up into
Treasured, and Tailings Disposal expense can also be reduced.
The content of the invention
The present invention is in view of the shortcomings of the prior art, there is provided a kind of both non-environmental-pollutions, exempt from again with cement, exempt from roasting,
Non-autoclaved curing, and the coefficient of softing of building materials brick is not less than 0.85, compression strength is not less than 28MPa；Filling is anti-with cured block
The Compressive Strength Low-silica iron ore tailings excellent with the water resistance that water suction saturation compression strength is not less than 9.5MPa and 6.5MPa respectively are exempted from
Steam block and preparation method.
Realize the measure of above-mentioned purpose：
A kind of non-evaporating piece of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and weight percent content are：For
Building materials brick, its iron tailings fine powder is 70 ~ 75%, and curing agent is 25 ~ 30%；For filling cured block, its iron tailings fine powder is
85 ~ 90%, curing agent is 10 ~ 15%；The content of grain graininess≤88 μm is not less than 70% in iron tailings fine powder；Additional stearic yogurt
Liquid or odium stearate emulsion and triethanolamine, wherein stearic acid late or odium stearate emulsion are according to added curing agent gross weight
5 ~ 15% additions of percentage, triethanolamine is added according to the 0.03 ~ 0.05% of added curing agent total weight percent；
Described stearic acid late or odium stearate emulsion are by stearic acid or odium stearate, water and neopelex
Composition, its add part by weight according to：Stearic acid or odium stearate：Water：Neopelex=1:50:0.15.
It is：Described curing agent is made up of flyash, quick lime and gypsum, its add part by weight according to:Fine coal
Ash：Quick lime：Gypsum=1：0.35~0.45：0.12~0.14 prepares；And control the content of 45 μm of granularity ＜ in three kinds of raw materials
It is not less than 95%.
It is：The preparation of described stearic acid late or odium stearate emulsion is followed the steps below：By stearic acid
Or odium stearate and water are according to stearic acid or odium stearate：Water：Neopelex=1:50:After the mixing of 0.15 ratio,
Heat and stir under the conditions of 80 ~ 90 DEG C, after stearic acid or odium stearate are completely dissolved into grease, under stirring, press
Ratio according to set 0.15 adds neopelex, after be further continued for heating no less than 60 minutes, it is last naturally cold
But to room temperature.
The method for preparing a kind of non-evaporating piece of the excellent Low-silica iron ore tailings of water resistance, its step：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 75~87%；
2）Low-silica iron ore tailings slurry after will be concentrated mixes with curing agent according to content, and is sprayed while while mixing
Stearic acid late or odium stearate emulsion and triethanolamine, fountain height according to：Stearic acid late or odium stearate emulsion are solidification
5 ~ 15% sprinklings of agent total weight percent, triethanolamine is 0.03 ~ 0.05% sprinkling of curing agent total weight percent；Low-silicon iron
The addition of Tailings Slurry is added after being calculated according to Low-silica iron ore tailings dry weight percentage therein；
3）It is aged, Aging Temperature is 20 ~ 50 DEG C, digestion time is 5 ~ 60 hours；
4）Moisture in aged rear compound carries out rolling when reaching 10 ~ 12%, and controls the volume of compound after rolling
Proportion is not less than 1500kg/m3；
5）It is press-formed, briquetting pressure is controlled in 30 ~ 55MPa；
6）Conserved：Conserved 1 ~ 7 day under the conditions of 40 ~ 60 DEG C, then conserved at room temperature to use requirement is met, treated
With.
The effect of stearic acid late or odium stearate emulsion in the present invention：There is lime in curing agent, be very effective alkali
Property exactor agent, but its easily with Carbon Dioxide in Air react and be consumed, reduce curing agent gelatinization results.Through a large amount of examinations
Analysis is tested, surfactant water-wet side can be attached to solid particles surface, hydrophobic section in stearic acid late or odium stearate emulsion
Stretch out.Thus spray stearic acid late or odium stearate breast while stirring in Low-silica iron ore tailings are the compound of curing agent
Liquid, was allowed in raw material mixing, ageing, initial curing each stage, and stearic acid late or odium stearate emulsion can be with air-isolations, energy
Avoid consumption of the carbon dioxide therein to alkali；And maintenance is when using, its attachment can make the pore inside tailing solidifying block again
Surface hydrophobicity, reduces water absorption rate, so as to reduce destruction of the water to cured block mechanical strength.
The present invention compared with prior art, not only exempts from roasting, non-autoclaved curing, and exempt to use cement, non-environmental-pollution to build
The compression strength of material brick is not less than 28MPa, judges that the coefficient of softing of water resistance is not less than 0.85；Cured block pressure resistance is used in filling
Degree and water suction saturation compression strength are not less than 9.5MPa and 6.5MPa respectively.
Brief description of the drawings
Fig. 1 is stearic acid late or odium stearate emulsion volume to cured block 7 days and 14 days water absorption rates and coefficient of softing
Influence；
Fig. 2 is influence of the greenhouse curing temperature to 7 days water absorption rates of cured block and coefficient of softing；
In figure：▼ and ● represent the curve of water absorption rate and coefficient of softing respectively.
Specific embodiment
In order to preferably explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
Present disclosure is not limited solely to following examples.
Curing agent described in following embodiment is according to part by weight, in flyash：Quick lime：Gypsum=1：0.35
~0.45：Arbitrarily prepared in the range of 0.12~0.14.
Stearic acid late or odium stearate emulsion described in following embodiment is according to part by weight：Stearic acid or tristearin
Sour sodium：Water：Neopelex=1:50:0.15 is configured；It is prepared in following steps and parameter area
's：After stearic acid or odium stearate and water are mixed according to the ratio set by claim 1, heat and stir under the conditions of 80 ~ 90 DEG C
Mix, after stearic acid or odium stearate are completely dissolved into grease, under stirring, the ratio according to set 0.15 adds
Plus neopelex, after be further continued for heating no less than 60 minutes, finally naturally cool to room temperature.
Embodiment 1
A kind of non-evaporating filling cured block of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and percentage by weight contain
Measure and be：Its iron tailings fine powder is 85.2%, and curing agent is 14.8%；The content of granularity≤88 μm is 80% in its iron tailings powder；It is additional
Stearic acid late and triethanolamine, wherein stearic acid late are added according to the 5.8% of added curing agent total weight percent, and three
Monoethanolamine is added according to the 0.035% of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 85%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 80%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are 5.8% spray of curing agent total weight percent
Spill, triethanolamine is 0.035% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron tail
Ore deposit dry weight percentage be 85.2%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration for 85% be computed after and
Add；
3）It is aged, Aging Temperature is 21 DEG C, digestion time is 59 hours；
4）Moisture in aged rear compound carries out rolling when reaching 10%, and the volume weight of compound is after rolling
1610 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 45MPa；
6）Conserved：Conserved 6 days under the conditions of 51 DEG C, then conserved 22 days at room temperature, it is stand-by.
After testing, prepared iron tailings filling cured block compression strength is 11.7MPa, and water suction saturation compression strength is
8.4MPa。
Embodiment 2
A kind of non-evaporating filling cured block of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and percentage by weight contain
Measure and be：Its iron tailings fine powder is 87.6%, and curing agent is 12.4%；The content of granularity≤88 μm is 75.5% in its iron tailings powder；Outward
Plus stearic acid late and triethanolamine, wherein stearic acid late according to added curing agent total weight percent 10% addition, three
Monoethanolamine is added according to the 0.04% of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 85%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 75.5%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are 10% spray of curing agent total weight percent
Spill, triethanolamine is 0.04% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron tail
Ore deposit dry weight percentage be 87.6%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration for 85% be computed after and
Add；
3）It is aged, Aging Temperature is 35 DEG C, digestion time is 49 hours；
4）Moisture in aged rear compound carries out rolling when reaching 11%, and the volume weight of compound is after rolling
1580 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 50MPa；
6）Conserved：Conserved 7 days under the conditions of 48 DEG C, then conserved 21 days at room temperature, it is stand-by.
After testing, prepared iron tailings filling cured block compression strength is 10.8MPa, and water suction saturation compression strength is
7.8MPa。
Embodiment 3
A kind of non-evaporating filling cured block of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and percentage by weight contain
Measure and be：Its iron tailings fine powder is 90%, and curing agent is 10%；The content of granularity≤88 μm is 72% in its iron tailings powder；Additional tristearin
Yogurt liquid and triethanolamine, wherein stearic acid late are added according to the 15% of added curing agent total weight percent, triethanolamine
According to 0.03% addition of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 87%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 72%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are 15% spray of curing agent total weight percent
Spill, triethanolamine is 0.03% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron tail
Ore deposit dry weight percentage is 90%, is added after the Low-silica iron ore tailings weight percent concentration in Low-silica iron ore tailings slurry is computed for 87%
Enter；
3）It is aged, Aging Temperature is 29 DEG C, digestion time is 52 hours；
4）Moisture in aged rear compound carries out rolling when reaching 11.5%, and the volume weight of compound is after rolling
1560 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 55MPa；
6）Conserved：Conserved 5 days under the conditions of 48 DEG C, then conserved 23 days at room temperature, it is stand-by.
After testing, prepared iron tailings filling cured block compression strength is 9.8MPa, and water suction saturation compression strength is
6.9MPa。
Embodiment 4
A kind of non-evaporating building materials brick of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and weight percent content
For：Its iron tailings fine powder is 71%, and curing agent is 29%；The content of granularity≤88 μm is 82% in its iron tailings powder；Additional stearic acid
Sodium emulsion and triethanolamine, wherein odium stearate emulsion are added according to the 14.5% of added curing agent total weight percent, three second
Hydramine is added according to the 0.05% of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 75%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 82%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are the 14.5% of curing agent total weight percent
Sprinkling, triethanolamine is 0.05% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron
Tailing dry percentage by weight be 71%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration for 75% be computed after and
Add；
3）It is aged, Aging Temperature is 49 DEG C, digestion time is 6 hours；
4）Moisture in aged rear compound carries out rolling when reaching 11%, and the volume weight of compound is after rolling
1650 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 31MPa；
6）Conserved：Conserved 1 day under the conditions of 60 DEG C, then conserved 27 days at room temperature, it is stand-by.
After testing, prepared building materials brick compression strength is 30.1MPa, and coefficient of softing is 0.92.
Embodiment 5
A kind of non-evaporating building materials brick of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and weight percent content
For：Its iron tailings fine powder is 73%, and curing agent is 27%；The content of granularity≤88 μm is 78% in its iron tailings powder；Additional stearic acid
Sodium emulsion and triethanolamine, wherein odium stearate emulsion are added according to the 13% of added curing agent total weight percent, three ethanol
Amine is added according to the 0.042% of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 77%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 78%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are 13% spray of curing agent total weight percent
Spill, triethanolamine is 0.042% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron tail
Ore deposit dry weight percentage is 73%, is added after the Low-silica iron ore tailings weight percent concentration in Low-silica iron ore tailings slurry is computed for 77%
Enter；
3）It is aged, Aging Temperature is 40 DEG C, digestion time is 24 hours；
4）Moisture in aged rear compound carries out rolling when reaching 10.3%, and the volume weight of compound is after rolling
1630 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 40MPa；
6）Conserved：36 hours are conserved under the conditions of 60 DEG C, then is conserved 26.5 days at room temperature, it is stand-by.
After testing, prepared building materials brick compression strength is 29.4MPa, and coefficient of softing is 0.9.
Embodiment 6
A kind of non-evaporating building materials brick of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and weight percent content
For：Its iron tailings fine powder is 74%, and curing agent is 26%；The content of granularity≤88 μm is 75% in its iron tailings powder；Additional stearic acid
Sodium emulsion and triethanolamine, wherein odium stearate emulsion are added according to the 14.8% of added curing agent total weight percent, three second
Hydramine is added according to the 0.031% of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 79%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 75%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are the 14.8% of curing agent total weight percent
Sprinkling, triethanolamine is 0.031% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron
Tailing dry percentage by weight be 74%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration for 79% be computed after and
Add；
3）It is aged, Aging Temperature is 30 DEG C, digestion time is 47 hours；
4）Moisture in aged rear compound carries out rolling when reaching 10.8%, and the volume weight of compound is after rolling
1580 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 45MPa；
6）Conserved：24 hours are conserved under the conditions of 59 DEG C, then is conserved 27 days at room temperature, it is stand-by.
After testing, prepared building materials brick compression strength is 28.2MPa, and coefficient of softing is 0.88.
Embodiment 7
A kind of non-evaporating building materials brick of the excellent Low-silica iron ore tailings of water resistance, its raw material composition and weight percent content
For：Its iron tailings fine powder is 75%, and curing agent is 25%；The content of granularity≤88 μm is 72% in its iron tailings powder；Additional stearic acid
Sodium emulsion and triethanolamine, wherein odium stearate emulsion are added according to the 14.8% of added curing agent total weight percent, three second
Hydramine is added according to the 0.031% of added curing agent total weight percent；
Preparation process：
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, control Low-silica iron ore tailings slurry
In Low-silica iron ore tailings weight percent concentration be 80%；Granularity≤88 μm in Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry
Content be 72%；
2）By it is above-mentioned it is concentrated after Low-silica iron ore tailings slurry mix according to content with curing agent, and while mixing while while
Sprinkling stearic acid late or odium stearate emulsion and triethanolamine, stearic acid late are 11% spray of curing agent total weight percent
Spill, triethanolamine is 0.05% sprinkling of curing agent total weight percent；Low-silica iron ore tailings slurry addition according to：Low-silicon iron tail
Ore deposit dry weight percentage is 75%, is added after the Low-silica iron ore tailings weight percent concentration in Low-silica iron ore tailings slurry is computed for 80%
Enter；
3）It is aged, Aging Temperature is 27 DEG C, digestion time is 49 hours；
4）Moisture in aged rear compound carries out rolling when reaching 11.3%, and the volume weight of compound is after rolling
1590 kg/m3；
5）It is press-formed, briquetting pressure is controlled in 44MPa；
6）Conserved：36 hours are conserved under the conditions of 55 DEG C, then is conserved 26.5 days at room temperature, it is stand-by.
After testing, prepared building materials brick compression strength is 29.5MPa, and coefficient of softing is 0.91.
This specific embodiment is only most preferably to enumerate, not to the restricted implementation of technical solution of the present invention.
Claims (1)
1. the method for preparing a kind of non-evaporating piece of the excellent Low-silica iron ore tailings of water resistance, its step：
Non-evaporating piece of the Low-silica iron ore tailings, raw material composition and weight percent content are：For building materials brick, its iron tailings fine powder
It is 70 ~ 75%, curing agent is 25 ~ 30%；For filling cured block, its iron tailings fine powder is 85 ~ 90%, and curing agent is 10 ~ 15%；
The content of grain graininess≤88 μm is not less than 70% in iron tailings fine powder；Additional stearic acid late or odium stearate emulsion and three second
Hydramine, wherein stearic acid late or odium stearate emulsion are added according to the 5 ~ 15% of added curing agent total weight percent, three second
Hydramine is added according to the 0.03 ~ 0.05% of added curing agent total weight percent；
Described stearic acid late or odium stearate emulsion are by stearic acid or odium stearate, water and neopelex group
Into, its add part by weight according to：Stearic acid or odium stearate：Water：Neopelex=1:50:0.15；
1）Low-silica iron ore tailings slurry after crushing, grinding and reach setting granularity is concentrated, in control Low-silica iron ore tailings slurry
Low-silica iron ore tailings weight percent concentration is 75~87%；
2）Low-silica iron ore tailings slurry after will be concentrated mixes with curing agent according to content, and sprays tristearin while while mixing
Yogurt liquid or odium stearate emulsion and triethanolamine, fountain height according to：Stearic acid late or odium stearate emulsion are that curing agent is total
5 ~ 15% sprinklings of percentage by weight, triethanolamine is 0.03 ~ 0.05% sprinkling of curing agent total weight percent；Low-silica iron ore tailings
The addition of slurry is added after being calculated according to Low-silica iron ore tailings dry weight percentage therein；
3）It is aged, Aging Temperature is 20 ~ 50 DEG C, digestion time is 5 ~ 60 hours；
4）Moisture in aged rear compound carries out rolling when reaching 10 ~ 12%, and controls the volume weight of compound after rolling
It is not less than 1500kg/m3；
5）It is press-formed, briquetting pressure is controlled in 30 ~ 55MPa；
6）Conserved：Conserved 1 ~ 7 day under the conditions of 40 ~ 60 DEG C, then conserved at room temperature to use requirement is met, it is stand-by.
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| CN105777033A (en) * | 2016-02-02 | 2016-07-20 | 大连地拓重工有限公司 | Low silicon iron tailing autoclaved brick and preparing method thereof |
| CN114276092B (en) * | 2022-01-21 | 2023-06-06 | 光大国信环保科技(北京)有限公司 | Composition of steaming-free building material product, and preparation method and application thereof |
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Effective date of registration: 20181116 Address after: 430083 No. 107 Construction Sixth Road, Qingshan District, Wuhan City, Hubei Province Co-patentee after: Wuhan University of Science and Technology Patentee after: Wugang Resources Group Co., Ltd. Address before: 430080 999 Friendship Avenue, Wuchang District, Wuhan, Hubei. Co-patentee before: Wuhan University of Science and Technology Patentee before: Wuhan Iron & Steel (Group) Corp. |