CN104944880A - 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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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- 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 a kind of building or mine filling material and preparation method, belong to non-evaporating piece of a kind of Low-silica iron ore tailings and preparation method particularly, is excellent non-evaporating piece of the Low-silica iron ore tailings of a kind of water resistance and preparation method definitely.
Background technology
Iron tailings is iron ore remaining solid waste after choosing iron ore concentrate.Along with developing rapidly of China's Iron And Steel Industry, the produced quantity of iron ore constantly increases, and the mine tailing that iron ore factory discharges gets more and more, and show, nearly 300,000,000 t of the annual tailing disposal of national iron mine beneficiation factory, and comprehensive utilization ratio does not reach 20% according to pertinent data.The discharge of iron tailings and disposal are the bottleneck factor hindering China's mining development always.Dispose mine tailing and not only tie up a large amount of soil, and harm environment and safety, be mainly manifested in: (1) mine tailing granularity is little, tap density large, leakage of easily flowing and collapse when stacking, vegetation destruction; (2) tailings flies upward everywhere under the promotion of strong wind, causes soil pollution, and land deterioration and dust content of air increase; (3) mine tailing composition and residual beneficiation reagent aggravate environmental destruction, and farm crop, the surface water and underground water source are polluted.(4) mine tailing warehouse-in is stored up and be there is potential safety hazard, and takies a large amount of land resources.
Underground mining makes ground create subsidence area, and mine tailing directly enters subsidence area, and muddy water can enter minery, brings have a strong impact on to downhole production; Subsidence area, filling earth's surface after tailing solidifying, neither affect down-hole mining and produce, also can routinely solve Tailings Disposal problem, subsidence area, tailing solidifying filling earth's surface is the new technology of Tailings Disposal.Cured block water tolerance affects the topmost factor of tailing solidifying block performance, and the water tolerance improving tailing solidifying block is conducive to reducing hardener dose, reduces production cost.
China forbade producing, using and selling solid clay brick in 30 days June in 2003, and advocated research use industrial waste as building material.Production of construction materials has certain requirement to silicone content in raw material, and silicone content is lower, utilizes difficulty larger.Raw material granularity is thinner, and gel material content is larger, and production cost is higher.So utilize the low silicon tailings of particulate to produce building materials, technical difficulty is very large.
At present, in the art, though all adopt iron tailings to prepare non-evaporating brick or filling cured block, its solidifying agent still adopts cement.The need of production of cement hardener through pyroprocess, consumption of calorie, and to environmental danger.Utilize cement hardener, curing speed is fast, although simply, production cost is higher.As through retrieval Chinese Patent Application No. be the document of 201010610408.2, its disclosed " a kind of free of calcining and steam curing tailing-bricks and preparation method thereof ", Chinese Patent Application No. are the patent documentation of 201110203216.4, the document that the document that Chinese Patent Application No. is 201010622991.9, Chinese Patent Application No. are 91106276.9, Chinese Patent Application No. be 201310331006.2 document, Chinese Patent Application No. be the document of 200910272609.3, all still adopt cement to make solidifying agent; In addition, the paper retrieved have employed cement too and makees solidifying agent.
There is clinker mineral in cement, very easily solidified by hydration reaction under normal temperature curing condition.From principle, using cement to prepare tailing-bricks as solidifying agent can realize under non-evaporating, unburned condition; By increasing the means such as hardener dose, optimizing materials grating and curing condition, easily realize the technical requirements such as water tolerance, frost resistance.
Hot industry produces a large amount of solid waste in producing, and as flyash etc., has potential reactive behavior, can be prepared into non-clinker mineral gelling material, replace cement to do tailing solidifying agent, have cost low, the advantages such as energy-conserving and environment-protective with this.Non-clinker mineral solidifying agent is different from cement hardener, and its hydration reaction is slow, needs to take activity excitation technology; Even so, hydration reaction speed still can not be compared with cement.Under non-evaporating, unburned condition, use non-cement hardener to prepare tailing-bricks, must product be made to reach national technical standard in curing time limited in factory; At this moment, the water tolerance and the frost resistance that improve tailing-bricks just become the technical bottleneck that must overcome.It is reported, utilize non-cement hardener to prepare tailing solidifying block, cured block ultimate compression strength and the saturated ultimate compression strength of water suction are respectively 12.4MPa and 3.4MPa, and goods coefficient of softening is only 0.27.
For improving the water tolerance of plastering, some researchs add water-proof material (such as metallic soap, pitch, stearic acid, resin etc.) in Gypsum slurry, make the gypsum inner particle surface of sclerosis form waterproof layer; Or adopt surging injection of material to gypsum hardenite on the surface, or hydrophobic material is coated with on plastering, make its surface form water-repellent layer.The short-term waterproof of above-mentioned 2 kinds of technical measures to gypsum has good effect, makes plastering 2 h water-intake rate be only 3 % ~ 6 %, but long-term waterproof effect is all undesirable, and its 24 h water-intake rate is general still more than 10%.Gypsum is air hardening cementitious materials, adds water-resisting agent and completely cuts off moisture, less on the impact of product strength.And gypsum is generally as building and ornament materials, and its gelling property is much more weak than hydraulic material-cement, cannot be used for solidifying mine tailing to prepare non-evaporating piece of mine tailing.More importantly, clinker mineral gelling material is the same with cement, it is hydraulic cementing materials, completely different from gypsum, hydration reaction needs water, uses for reference the technological thought improving plastering water tolerance, very likely produces a contrary effect, hydrophober isolated water may suppress hydration reaction, reduces the mechanical property of non-evaporating piece of mine tailing.
Underground mining causes surface subsidence, and ore dressing produces a large amount of mine tailing, and cost of disposal is very high.Tailings Slurry direct filling surface subsidence district can make a large amount of mud infiltrate down-hole and affect underground mining production, and after tailing solidifying, subsidence area, filling earth's surface then can overcome the above problems.Solid waste is utilized to prepare non-clinker mineral gelling material, and as solidifying agent solidification mine tailing, prepare non-evaporating piece of the mine tailing of different mechanical properties, be respectively used to subsidence area, filling earth's surface, make material of construction, then not only may turn waste into wealth, and Tailings Disposal expense can also be reduced.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, provide one both non-environmental-pollutions, exempt from again with cement, exempt from roasting, non-autoclaved curing, and the coefficient of softening of building materials brick is not less than 0.85, ultimate compression strength is not less than 28MPa; Filling cured block ultimate compression strength and the saturated ultimate compression strength of water suction are not less than non-evaporating piece excellent of Low-silica iron ore tailings of the water resistance of 9.5MPa and 6.5MPa and preparation method respectively.
Realize the measure of above-mentioned purpose:
Non-evaporating piece of the Low-silica iron ore tailings that a kind of water resistance is excellent, its raw material composition and weight percent content are: for building materials brick, its iron tailings fine powder is 70 ~ 75%, and solidifying agent is 25 ~ 30%; For filling cured block, its iron tailings fine powder is 85 ~ 90%, and solidifying agent is 10 ~ 15%; In iron tailings fine powder, the content of grain graininess≤88 μm is not less than 70%; Additional stearic acid late or sodium stearate emulsion and trolamine, wherein stearic acid late or sodium stearate emulsion add according to 5 ~ 15% of added solidifying agent total weight percent, and trolamine adds according to 0.03 ~ 0.05% of added solidifying agent total weight percent;
Described stearic acid late or sodium stearate emulsion be made up of stearic acid or sodium stearate, water and Sodium dodecylbenzene sulfonate, and it adds part by weight according to stearic acid or sodium stearate: water: Sodium dodecylbenzene sulfonate=1:50:0.15.
It is: described solidifying agent is made up of flyash, unslaked lime and gypsum, and it adds part by weight according to flyash: unslaked lime: gypsum=1:0.35 ~ 0.45:0.12 ~ 0.14 is prepared; And the content controlling granularity < 45 μm in three kinds of raw materials is not less than 95%.
It is: the preparation of described stearic acid late or sodium stearate emulsion is carried out according to following steps: after stearic acid or sodium stearate being mixed according to the ratio set by claim 2 with water, heat under 80 ~ 90 DEG C of conditions and stir, after stearic acid or sodium stearate are dissolved into oily matter completely, under whipped state, ratio according to set 0.15 adds Sodium dodecylbenzene sulfonate, after continue heating again and be no less than 60 minutes, finally naturally cool to room temperature.
Prepare the method for non-evaporating piece of the excellent Low-silica iron ore tailings of a kind of water resistance, its step:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 75 ~ 87%;
2) the Low-silica iron ore tailings slurry after concentrated is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, fountain height according to: stearic acid late or sodium stearate emulsion be solidifying agent total weight percent 5 ~ 15% spray, trolamine be solidifying agent total weight percent 0.03 ~ 0.05% spray; The add-on of Low-silica iron ore tailings slurry adds according to after Low-silica iron ore tailings dry weight percentage calculation wherein;
3) carry out ageing, Aging Temperature is 20 ~ 50 DEG C, and digestion time is 5 ~ 60 hours;
4) moisture after ageing in compound carries out rolling when reaching 10 ~ 12%, and after controlling rolling, the volume weight of compound is not less than 1500kg/m
3;
5) carry out extrusion forming, forming pressure controls at 30 ~ 55MPa;
6) carry out maintenance: maintenance 1 ~ 7 day under 40 ~ 60 DEG C of conditions, more at room temperature maintenance is to meeting service requirements, stand-by.
The effect of stearic acid late or sodium stearate emulsion in the present invention: have lime in solidifying agent is the agent of very effective alkaline excitation machine, but it easily reacts with Carbon Dioxide in Air and be consumed, the gelatinization results of reduction solidifying agent.Through lot of experiments analysis, in stearic acid late or sodium stearate emulsion, tensio-active agent water-wet side can be attached to solid particles surface, and hydrophobic section stretches out.Thus in the compound of Low-silica iron ore tailings and solidifying agent, stearic acid late or sodium stearate emulsion is sprayed while stirring, make it in raw material mixing, ageing, initial curing each stage, stearic acid late or sodium stearate emulsion can air-isolations, and carbonic acid gas wherein can be avoided the consumption of alkali; And during maintenance use, its attachment can make again the pore surface hydrophobicity of tailing solidifying block inside, reduces water-intake rate, thus reduce water to the destruction of cured block mechanical strength.
The present invention compared with prior art, not only exempts from roasting, non-autoclaved curing, and exempts from cement, non-environmental-pollution, and the ultimate compression strength of building material brick is not less than 28MPa, judges that the coefficient of softening of water resistance is not less than 0.85; Filling cured block ultimate compression strength and the saturated ultimate compression strength of water suction are not less than 9.5MPa and 6.5MPa respectively.
Accompanying drawing explanation
Fig. 1 is stearic acid late or sodium stearate emulsion volume on the impact of cured block 7 days and 14 days water-intake rates and coefficient of softening;
Fig. 2 is greenhouse curing temperature on the impact of cured block 7 days water-intake rates and coefficient of softening;
In figure: ▼ and ● represent the curve of water-intake rate and coefficient of softening respectively.
Embodiment
In order to explain the present invention better, illustrate main contents of the present invention further below in conjunction with specific embodiment, but content of the present invention is not only confined to following examples.
solidifying agent described in following embodiment is according to part by weight, at flyash: unslaked lime: preparation arbitrarily in gypsum=1:0.35 ~ 0.45:0.12 ~ 0.14 scope.
Stearic acid late described in following embodiment or sodium stearate emulsion are according to part by weight: stearic acid or sodium stearate: water: Sodium dodecylbenzene sulfonate=1:50:0.15 is configured; It prepares in following steps and parameter area: after stearic acid or sodium stearate being mixed according to the ratio set by claim 1 with water, heat under 80 ~ 90 DEG C of conditions and stir, after stearic acid or sodium stearate are dissolved into oily matter completely, under whipped state, ratio according to set 0.15 adds Sodium dodecylbenzene sulfonate, after continue heating again and be no less than 60 minutes, finally naturally cool to room temperature.
Embodiment 1
The non-evaporating filling cured block of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 85.2%, and solidifying agent is 14.8%; In its iron tailings powder, the content of granularity≤88 μm is 80%; Additional stearic acid late and trolamine, wherein stearic acid late adds according to 5.8% of added solidifying agent total weight percent, and trolamine adds according to 0.035% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 85%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 80%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 5.8% of solidifying agent total weight percent is sprayed, and trolamine is that 0.035% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 85.2%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 85% as calculated after add;
3) carry out ageing, Aging Temperature is 21 DEG C, and digestion time is 59 hours;
4) moisture after ageing in compound carries out rolling when reaching 10%, and after rolling, the volume weight of compound is 1610 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 45MPa;
6) maintenance is carried out: maintenance 6 days under 51 DEG C of conditions, more at room temperature maintenance 22 days, stand-by.
After testing, prepared iron tailings filling cured block ultimate compression strength is 11.7MPa, and the saturated ultimate compression strength that absorbs water is 8.4MPa.
Embodiment 2
The non-evaporating filling cured block of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 87.6%, and solidifying agent is 12.4%; In its iron tailings powder, the content of granularity≤88 μm is 75.5%; Additional stearic acid late and trolamine, wherein stearic acid late adds according to 10% of added solidifying agent total weight percent, and trolamine adds according to 0.04% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 85%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 75.5%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 10% of solidifying agent total weight percent is sprayed, and trolamine is that 0.04% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 87.6%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 85% as calculated after add;
3) carry out ageing, Aging Temperature is 35 DEG C, and digestion time is 49 hours;
4) moisture after ageing in compound carries out rolling when reaching 11%, and after rolling, the volume weight of compound is 1580 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 50MPa;
6) maintenance is carried out: maintenance 7 days under 48 DEG C of conditions, more at room temperature maintenance 21 days, stand-by.
After testing, prepared iron tailings filling cured block ultimate compression strength is 10.8MPa, and the saturated ultimate compression strength that absorbs water is 7.8MPa.
Embodiment 3
The non-evaporating filling cured block of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 90%, and solidifying agent is 10%; In its iron tailings powder, the content of granularity≤88 μm is 72%; Additional stearic acid late and trolamine, wherein stearic acid late adds according to 15% of added solidifying agent total weight percent, and trolamine adds according to 0.03% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 87%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 72%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 15% of solidifying agent total weight percent is sprayed, and trolamine is that 0.03% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 90%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 87% as calculated after add;
3) carry out ageing, Aging Temperature is 29 DEG C, and digestion time is 52 hours;
4) moisture after ageing in compound carries out rolling when reaching 11.5%, and after rolling, the volume weight of compound is 1560 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 55MPa;
6) maintenance is carried out: maintenance 5 days under 48 DEG C of conditions, more at room temperature maintenance 23 days, stand-by.
After testing, it is 9.8MPa that prepared iron tailings fills cured block ultimate compression strength, and the saturated ultimate compression strength that absorbs water is 6.9MPa.
Embodiment 4
The non-evaporating building materials brick of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 71%, and solidifying agent is 29%; In its iron tailings powder, the content of granularity≤88 μm is 82%; Additional sodium stearate emulsion and trolamine, wherein sodium stearate emulsion adds according to 14.5% of added solidifying agent total weight percent, and trolamine adds according to 0.05% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 75%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 82%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 14.5% of solidifying agent total weight percent is sprayed, and trolamine is that 0.05% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 71%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 75% as calculated after add;
3) carry out ageing, Aging Temperature is 49 DEG C, and digestion time is 6 hours;
4) moisture after ageing in compound carries out rolling when reaching 11%, and after rolling, the volume weight of compound is 1650 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 31MPa;
6) maintenance is carried out: maintenance 1 day under 60 DEG C of conditions, more at room temperature maintenance 27 days, stand-by.
After testing, prepared building materials brick ultimate compression strength is 30.1MPa, and coefficient of softening is 0.92.
Embodiment 5
The non-evaporating building materials brick of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 73%, and solidifying agent is 27%; In its iron tailings powder, the content of granularity≤88 μm is 78%; Additional sodium stearate emulsion and trolamine, wherein sodium stearate emulsion adds according to 13% of added solidifying agent total weight percent, and trolamine adds according to 0.042% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 77%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 78%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 13% of solidifying agent total weight percent is sprayed, and trolamine is that 0.042% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 73%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 77% as calculated after add;
3) carry out ageing, Aging Temperature is 40 DEG C, and digestion time is 24 hours;
4) moisture after ageing in compound carries out rolling when reaching 10.3%, and after rolling, the volume weight of compound is 1630 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 40MPa;
6) maintenance is carried out: maintenance 36 hours under 60 DEG C of conditions, more at room temperature maintenance 26.5 days, stand-by.
After testing, prepared building materials brick ultimate compression strength is 29.4MPa, and coefficient of softening is 0.9.
Embodiment 6
The non-evaporating building materials brick of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 74%, and solidifying agent is 26%; In its iron tailings powder, the content of granularity≤88 μm is 75%; Additional sodium stearate emulsion and trolamine, wherein sodium stearate emulsion adds according to 14.8% of added solidifying agent total weight percent, and trolamine adds according to 0.031% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 79%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 75%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 14.8% of solidifying agent total weight percent is sprayed, and trolamine is that 0.031% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 74%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 79% as calculated after add;
3) carry out ageing, Aging Temperature is 30 DEG C, and digestion time is 47 hours;
4) moisture after ageing in compound carries out rolling when reaching 10.8%, and after rolling, the volume weight of compound is 1580 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 45MPa;
6) maintenance is carried out: maintenance 24 hours under 59 DEG C of conditions, more at room temperature maintenance 27 days, stand-by.
After testing, prepared building materials brick ultimate compression strength is 28.2MPa, and coefficient of softening is 0.88.
Embodiment 7
The non-evaporating building materials brick of Low-silica iron ore tailings that water resistance is excellent, its raw material composition and weight percent content are: its iron tailings fine powder is 75%, and solidifying agent is 25%; In its iron tailings powder, the content of granularity≤88 μm is 72%; Additional sodium stearate emulsion and trolamine, wherein sodium stearate emulsion adds according to 14.8% of added solidifying agent total weight percent, and trolamine adds according to 0.031% of added solidifying agent total weight percent;
Preparation process:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 80%; In Low-silica iron ore tailings powder in its Low-silica iron ore tailings slurry, the content of granularity≤88 μm is 72%;
2) above-mentioned Low-silica iron ore tailings slurry after concentrating is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, stearic acid late is that 11% of solidifying agent total weight percent is sprayed, and trolamine is that 0.05% of solidifying agent total weight percent is sprayed; Low-silica iron ore tailings slurry add-on according to: Low-silica iron ore tailings dry weight per-cent is 75%, Low-silica iron ore tailings slurry in Low-silica iron ore tailings weight percent concentration be 80% as calculated after add;
3) carry out ageing, Aging Temperature is 27 DEG C, and digestion time is 49 hours;
4) moisture after ageing in compound carries out rolling when reaching 11.3%, and after rolling, the volume weight of compound is 1590 kg/m
3;
5) carry out extrusion forming, forming pressure controls at 44MPa;
6) maintenance is carried out: maintenance 36 hours under 55 DEG C of conditions, more at room temperature maintenance 26.5 days, stand-by.
After testing, prepared building materials brick ultimate compression strength is 29.5MPa, and coefficient of softening is 0.91.
This embodiment is only the best and exemplifies, the restricted enforcement not to technical solution of the present invention.
Claims (4)
1. non-evaporating piece of the Low-silica iron ore tailings that a water resistance is excellent, its raw material composition and weight percent content are: for building materials brick, its iron tailings fine powder is 70 ~ 75%, and solidifying agent is 25 ~ 30%; For filling cured block, its iron tailings fine powder is 85 ~ 90%, and solidifying agent is 10 ~ 15%; In iron tailings fine powder, the content of grain graininess≤88 μm is not less than 70%; Additional stearic acid late or sodium stearate emulsion and trolamine, wherein stearic acid late or sodium stearate emulsion add according to 5 ~ 15% of added solidifying agent total weight percent, and trolamine adds according to 0.03 ~ 0.05% of added solidifying agent total weight percent;
Described stearic acid late or sodium stearate emulsion be made up of stearic acid or sodium stearate, water and Sodium dodecylbenzene sulfonate, and it adds part by weight according to stearic acid or sodium stearate: water: Sodium dodecylbenzene sulfonate=1:50:0.15.
2. non-evaporating piece of the Low-silica iron ore tailings that a kind of water resistance as claimed in claim 1 is excellent, it is characterized in that: described solidifying agent is made up of flyash, unslaked lime and gypsum, it adds part by weight according to flyash: unslaked lime: gypsum=1:0.35 ~ 0.45:0.12 ~ 0.14 is prepared; And the content controlling granularity < 45 μm in three kinds of raw materials is not less than 95%.
3. non-evaporating piece of the Low-silica iron ore tailings that a kind of water resistance of preparation as claimed in claim 1 is excellent, it is characterized in that: the preparation of described stearic acid late or sodium stearate emulsion is carried out according to following steps: after stearic acid or sodium stearate are mixed according to the ratio set by claim 2 with water, heat under 80 ~ 90 DEG C of conditions and stir, after stearic acid or sodium stearate are dissolved into oily matter completely, under whipped state, ratio according to set 0.15 adds Sodium dodecylbenzene sulfonate, after continue heating again and be no less than 60 minutes, finally naturally cool to room temperature.
4. prepare the method for non-evaporating piece excellent of Low-silica iron ore tailings of a kind of water resistance according to claim 1, its step:
1) concentrate reaching the Low-silica iron ore tailings slurry after setting granularity through broken, grinding, the Low-silica iron ore tailings weight percent concentration controlled in Low-silica iron ore tailings slurry is 75 ~ 87%;
2) the Low-silica iron ore tailings slurry after concentrated is mixed according to content with solidifying agent, and stearic acid late or sodium stearate emulsion and trolamine are sprayed in limit while the mixing of limit, fountain height according to: stearic acid late or sodium stearate emulsion be solidifying agent total weight percent 5 ~ 15% spray, trolamine be solidifying agent total weight percent 0.03 ~ 0.05% spray; The add-on of Low-silica iron ore tailings slurry adds according to after Low-silica iron ore tailings dry weight percentage calculation wherein;
3) carry out ageing, Aging Temperature is 20 ~ 50 DEG C, and digestion time is 5 ~ 60 hours;
4) moisture after ageing in compound carries out rolling when reaching 10 ~ 12%, and after controlling rolling, the volume weight of compound is not less than 1500kg/m
3;
5) carry out extrusion forming, forming pressure controls at 30 ~ 55MPa;
6) carry out maintenance: maintenance 1 ~ 7 day under 40 ~ 60 DEG C of conditions, more at room temperature maintenance is to meeting service requirements, stand-by.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114276092A (en) * | 2022-01-21 | 2022-04-05 | 光大国信环保科技(北京)有限公司 | Non-autoclaved building material product composition and preparation method and application thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508857A (en) * | 2009-03-12 | 2009-08-19 | 宋金火 | Ammonium stearate emulsion and producing method thereof |
| CN101638924A (en) * | 2009-08-11 | 2010-02-03 | 武汉钢铁(集团)公司 | Limestone tailing-bricks and preparation method thereof |
| CN101993236A (en) * | 2010-10-13 | 2011-03-30 | 北京科技大学 | Method to prepare full-body tiles by iron tailings |
| CN102060505A (en) * | 2010-11-26 | 2011-05-18 | 武汉钢铁(集团)公司 | Preparation method of dolomite tailing bricks |
| CN102249628A (en) * | 2011-06-03 | 2011-11-23 | 济南高新区工业废弃物利用研发中心 | Dry-process desulphurized fly ash dry-mixed mortar |
| CN102336550A (en) * | 2011-07-20 | 2012-02-01 | 武汉钢铁(集团)公司 | Non-steamed brick and preparation method thereof |
| CN102924003A (en) * | 2012-11-12 | 2013-02-13 | 武汉钢铁(集团)公司 | Fine grain tailing low-cost solidification disposal method |
| CN103242000A (en) * | 2013-05-05 | 2013-08-14 | 冯乃谦 | Method for manufacturing waterproof heat-preservation heat-insulation building material by utilizing renewable recourse |
| CN104449585A (en) * | 2014-11-07 | 2015-03-25 | 江苏天舜金属材料集团有限公司 | Phase change energy storage building material and preparation method thereof |
-
2015
- 2015-06-16 CN CN201510332088.1A patent/CN104944880B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508857A (en) * | 2009-03-12 | 2009-08-19 | 宋金火 | Ammonium stearate emulsion and producing method thereof |
| CN101638924A (en) * | 2009-08-11 | 2010-02-03 | 武汉钢铁(集团)公司 | Limestone tailing-bricks and preparation method thereof |
| CN101993236A (en) * | 2010-10-13 | 2011-03-30 | 北京科技大学 | Method to prepare full-body tiles by iron tailings |
| CN102060505A (en) * | 2010-11-26 | 2011-05-18 | 武汉钢铁(集团)公司 | Preparation method of dolomite tailing bricks |
| CN102249628A (en) * | 2011-06-03 | 2011-11-23 | 济南高新区工业废弃物利用研发中心 | Dry-process desulphurized fly ash dry-mixed mortar |
| CN102336550A (en) * | 2011-07-20 | 2012-02-01 | 武汉钢铁(集团)公司 | Non-steamed brick and preparation method thereof |
| CN102924003A (en) * | 2012-11-12 | 2013-02-13 | 武汉钢铁(集团)公司 | Fine grain tailing low-cost solidification disposal method |
| CN103242000A (en) * | 2013-05-05 | 2013-08-14 | 冯乃谦 | Method for manufacturing waterproof heat-preservation heat-insulation building material by utilizing renewable recourse |
| CN104449585A (en) * | 2014-11-07 | 2015-03-25 | 江苏天舜金属材料集团有限公司 | Phase change energy storage building material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114276092A (en) * | 2022-01-21 | 2022-04-05 | 光大国信环保科技(北京)有限公司 | Non-autoclaved building material product composition and preparation method and application thereof |
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