CN104386990A - Red mud curing agent and use thereof - Google Patents
Red mud curing agent and use thereof Download PDFInfo
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- CN104386990A CN104386990A CN201410533435.2A CN201410533435A CN104386990A CN 104386990 A CN104386990 A CN 104386990A CN 201410533435 A CN201410533435 A CN 201410533435A CN 104386990 A CN104386990 A CN 104386990A
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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
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Abstract
The invention discloses a red mud curing agent and a use thereof and belongs to the technical field of red mud comprehensive utilization. The red mud curing agent comprises 20-90 parts of slag powder, 1-50 parts of fly ash, 1-30 parts of silt, 5-15 parts of a catalysis exciting agent containing sodium, potassium, calcium and magnesium and 0.1-10 parts of whisker fibers. Fly ash and silt can well adjust a silicon-aluminum ratio of red mud and liquid-plastic limit index and improve engineering body strength performance indexes and engineering usability. Whisker fibers improve a flexural capability and crack resistance of the finished product. The red mud curing agent is powdery solid, is convenient for engineering use, and can be used by addition and stirring based on a ratio according to different engineering performance requirements. Through reasonable blending, the red mud curing agent can improve strength of a cured body containing red mud as a main component, completely satisfy building non-burnt brick, road base and surface layer engineering index requirements and realize large consumption of red mud.
Description
Technical field
The present invention relates to red mud technical field of comprehensive utilization, particularly red mud solidified dose of one and application thereof.
Background technology
Red mud be with bauxite be produce in raw material production alumina process containing alkali solid waste, often produce one ton of aluminum oxide and approximately produce red mud 0.8 ~ 1.8 ton, China is alumina producing big country, within 2013, produce about 4,375 ten thousand tons, aluminum oxide, account for 45.9% of Gross World Product, nearly 5,000 ten thousand tons of the red mud of generation.The comprehensive utilization ratio of current China red mud is only about 4%, cause red mud to store up in a large number, the statistics volume of cargo in storage of 2009 about 200,000,000 tons, estimate that red mud in 2015 adds up volume of cargo in storage and will reach 400,000,000 tons, storing up in a large number of red mud is land occupation resource, easily causes environmental pollution and potential safety hazard again.
At present, alumina laterite fully utilizes in a large number and still belongs to global problem, in the world red mud is mainly adopted to the disposal options of storing up earthing.Along with the raising of environmental requirement, the red mud comprehensive utilization work of China obtains the great attention of each side in recent years.In order to advance red mud comprehensive utilization work, National Industrial and information-based portion, the Ministry of Science and Technology combines and prints and distributes " red mud comprehensive utilization instruction " (No. [2010] 401, Ministry of Industry and Information's interlink), pointing out to develop dissolve the in a large number utilisation technology with industrial competitiveness of strong basicity red mud in " red mud comprehensive utilization instruction " is the key of comprehensive utilization red mud, solve the fundamental policy that red mud pilling causes environmental pollution and potential safety hazard, the only way of Ye Shi China sustainable development of alumina industry." red mud comprehensive utilization instruction " also specifies red mud comprehensive utilization technique developing way simultaneously, as: red mud extracts valuable metal, roadbed cementing material, building brick, the cementing stopping composition in mine, batching production cement, Chemical bond ceramic composite, environment-friendly materials etc.
Describing a kind of water glass, active initiator and SILICA FUME and red mud of using in patent 201310252096 makes non-burning brick, but it needs autoclave steam-cured, expends comparatively high-grade energy.Describe the way of a kind of roadbase and the steady layer of water in patent CN200910162876: its main raw material is low-temp ceramics solidifying agent, red mud and aggregate, its red mud addition content only has 2 ~ 10%, and the utilization of red mud is lower.
Summary of the invention
In order to make up the deficiencies in the prior art, the invention provides a kind of red mud solidified dose and application.
The technical solution used in the present invention is:
A kind of red mud solidified dose, according to weight parts, comprising: 20-90 part slag powders, 1-50 part flyash, 1-30 part silt, 5-15 part are containing the catalysis exciting agent of sodium, potassium, calcium, magnesium elements and 0.1-10 part whisker fibre.By above each raw material Homogeneous phase mixing and dry packing obtains red mud solidified dose of product.
Preferably, the specific surface area of described slag powders is not less than 400 ㎡/kg.
Preferably, the particle diameter of described silt is not more than 100um, and the 80um of described silt tails over and is not more than 30%.
Further, described catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; 2-75%, 0.5-20%, 1-55%, 0.5-30% is respectively containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in described catalysis exciting agent.
Further, described whisker fibre is calcium carbonate or calcium sulfate crystal whiskers fiber.
Preferably, according to weight parts, comprising: 40-60 part slag powders, 20-30 part flyash, 10-20 part silt, 8-12 part are containing sodium, potassium, calcium, the catalysis exciting agent of magnesium elements and 1-5 part whisker fibre.
The red mud solidified dose of described application as the solidifying agent of solid brick material.
Use red mud solidified dose of described solidification red mud to prepare the method for solid brick, comprise the following steps: 1) take slag powders, flyash, silt, catalysis exciting agent and whisker fibre respectively according to parts by weight and obtain red mud solidified dose through combination drying; 2) take red mud and step 1) obtained red mud solidified dose respectively and mix, described red mud solidified dose is 1:3-1:8 with red mud weight ratio; 3) to step 2) add water in gained mixed powder after adopt forced stirrer to stir 8 ~ 15min; 4) step 3) gains are sent into brick press and make standard brick.
The red mud solidified dose of described application as the solidifying agent of Asphalt Pavement Base material.
The red mud solidified dose of described application as the solidifying agent of hardened ground layer material.
Beneficial effect of the present invention is:
Add flyash and silt in red mud solidified agent prescription of the present invention, sial element ratio and the Atterberg Limit index of red mud can be regulated preferably, add pi of strength and the engineering ease for use of engineering body.Red mud solidified agent prescription of the present invention comprises whisker fibre, whisker fibre add the flexural capacity and resistance to cleavage that add finished product, simultaneously due to the size less (whisker fibre length is generally 30-200um) of whisker fibre, also solve the problem mixed other long size fibers (cutting polypropylene as short) and be not easy to stir.In addition, red mud solidified dose of the present invention is powdery solid, and engineering is easy to use, only needs the requirement according to different engineering property, adds in proportion and stirs.Red mud solidified dose of the present invention can make red mud be that the cured body of main component has higher strength property, can meet the requirement of the engineering objectives such as building is non-burning brick, roadbase, surface layer completely, realize a large amount of target consuming red mud after rational proportion.
Embodiment
Embodiment 1
Red mud solidified dose of the present embodiment comprises the whisker fibre of 55kg slag powders, 25kg flyash, 10kg Yellow River mud, 12kg catalysis exciting agent, 1kg calcium carbonate.Wherein, the specific surface area of slag powders is not less than 400 ㎡/kg; Flyash uses second class powered coal ash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 55%, 10%, 25%, 10% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 400 ㎡/kg.
According to red mud solidified dose with red mud weight ratio be that 1:5 takes red mud solidified dose and red mud, Homogeneous phase mixing also stirs 8 ~ 15min to leather hard with forced stirrer after adding water, and standard brick made by brick press of then making a gift to someone, shaping rear direct piling, overlay film maintenance 28 days, obtains solid brick finished product.
Detect by GB/T21144-2007 " solid concrete brick " standard, adopt the solid brick density 1786kg/m3 of the present embodiment red mud solidified dose of obtaining and preparation; Ultimate compression strength mean value is 32.8MPa, conformance with standard Midst density grade B level and strength grade MU30 standard.
Embodiment 2
Red mud solidified dose of the present embodiment comprises the whisker fibre of 55kg slag powders, 25kg flyash, 10kg Yellow River mud, 12kg catalysis exciting agent, 1kg calcium carbonate.Wherein, the specific surface area of slag powders is not less than 300 ㎡/kg; Flyash uses second class powered coal ash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 55%, 10%, 25%, 10% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 200 ㎡/kg.
According to red mud solidified dose with red mud weight ratio be that 1:5 takes red mud solidified dose and red mud, Homogeneous phase mixing also stirs 8 ~ 15min to leather hard with forced stirrer after adding water, and standard brick made by brick press of then making a gift to someone, shaping rear direct piling, overlay film maintenance 28 days, obtains solid brick finished product.
Detect by GB/T21144-2007 " solid concrete brick " standard, adopt the solid brick density 1783kg/m3 of the present embodiment red mud solidified dose of obtaining and preparation; Ultimate compression strength mean value is 26.4MPa, conformance with standard Midst density grade B level and strength grade MU25 standard.
Embodiment 3
Red mud solidified dose of the present embodiment comprises the whisker fibre of 35kg slag powders, 45kg flyash, 10kg Yellow River mud, 12kg catalysis exciting agent, 1kg calcium sulfate.Wherein, the specific surface area of slag powders is not less than 400 ㎡/kg; Flyash uses three grades of flyash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 45%, 15%, 25%, 15% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 400 ㎡/kg.
According to red mud solidified dose with red mud weight ratio be that 1:6 takes red mud solidified dose and red mud, Homogeneous phase mixing also stirs 8 ~ 15min to leather hard with forced stirrer after adding water, and standard brick made by brick press of then making a gift to someone, shaping rear direct piling, overlay film maintenance 28 days, obtains solid brick finished product.
Detect by GB/T21144-2007 " solid concrete brick " standard, adopt the solid brick density 1672kg/m3 of the present embodiment red mud solidified dose of obtaining and preparation; Ultimate compression strength mean value is 27.8MPa, conformance with standard Midst density grade C level and strength grade MU25 standard.
Embodiment 4
Red mud solidified dose of the present embodiment comprises the whisker fibre of 55kg slag powders, 25kg flyash, 10kg Yellow River mud, 12kg catalysis exciting agent, 1kg calcium carbonate.Wherein, the specific surface area of slag powders is not less than 400 ㎡/kg; Flyash uses second class powered coal ash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 35%, 20%, 25%, 20% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 400 ㎡/kg.
Be that 1:10 takes red mud solidified dose and red mud according to red mud solidified dose with red mud weight ratio, Homogeneous phase mixing also stirs 8 ~ 15min to leather hard with forced stirrer after adding water, and namely can be used as Asphalt Pavement Base materials'use.Constructional method: use material distributing machine uniform distribution, every layer of 200mm, two-layer altogether, with the compaction in layers of ZY18 street roller, maintenance 7 days.Detect by JTG E51-2009 " highway engineering stabilized with inorganic binder testing of materials code ", index is: compactness >=98%, 7 days unconfined compression strength typical value 4.2MPa, can meet the requirement of JTG D50-2006 " bituminous pavement design for highway specification " very heavy traffic class of loading roadbase design performance.
Embodiment 5
In the present embodiment red mud solidified dose with in embodiment 4 red mud solidified dose identical.
Be that 1:15 takes red mud solidified dose and red mud according to red mud solidified dose with red mud weight ratio, Homogeneous phase mixing also stirs 8 ~ 15min to leather hard with forced stirrer after adding water, and namely can be used as Asphalt Pavement Base materials'use.Constructional method: use material distributing machine uniform distribution, every layer of 200mm, two-layer altogether, with the compaction in layers of ZY18 street roller, maintenance 7 days.Detect by JTG E51-2009 " highway engineering stabilized with inorganic binder testing of materials code ", index is: compactness >=97%, 7 days unconfined compression strength typical value 3.1MPa, can meet the requirement of JTG D50-2006 " bituminous pavement design for highway specification " very heavy traffic class of loading road subbase course design performance.
Embodiment 6
Red mud solidified dose of the present embodiment comprises the whisker fibre of 55kg slag powders, 25kg flyash, 10kg Yellow River mud, 12kg catalysis exciting agent, 1kg calcium carbonate.Wherein, the specific surface area of slag powders is not less than 400 ㎡/kg; Flyash uses second class powered coal ash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 55%, 10%, 25%, 10% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 400 ㎡/kg.
According to red mud solidified dose: red mud: stone weight ratio is that 1:1.5:3 takes red mud solidified dose, red mud and stone, Homogeneous phase mixing also stirs 8 ~ 15min to low slump concrete state with forced stirrer after adding water, and is applied to hardened ground layer.Constructional method: hardened ground layer construction thickness 250mm, the vigorous denseness 19s of dimension of mixing mixture, shakes with plate vibrator molded, surperficial troweling, overlay film maintenance 28 days.Detect by GB/T50107-2001 " Standard for inspection and assessment of strength of concrete ", index is: ultimate compression strength typical value 36.8MPa, folding strength typical value 5.1 MPa, meets C30 concrete strength standard of performance.
Embodiment 7
Red mud solidified dose of the present embodiment comprises the whisker fibre of 64kg slag powders, 15kg flyash, 10kg Yellow River mud, 14kg catalysis exciting agent, 3kg calcium carbonate.Wherein, the specific surface area of slag powders is not less than 400 ㎡/kg; Flyash uses second class powered coal ash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 55%, 20%, 15%, 10% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 400 ㎡/kg.
According to red mud solidified dose: red mud: stone weight ratio is that 1:1.5:3 takes red mud solidified dose, red mud and stone, Homogeneous phase mixing also stirs 8 ~ 15min to low slump concrete state with forced stirrer after adding water, and is applied to hardened ground layer.Constructional method: hardened ground layer construction thickness 250mm, the vigorous denseness 18s of dimension of mixing mixture, shakes with plate vibrator molded, surperficial troweling, overlay film maintenance 28 days.Detect by GB/T50107-2001 " Standard for inspection and assessment of strength of concrete ", index is: ultimate compression strength typical value 42.8MPa, folding strength typical value 6.9 MPa, meets C40 concrete strength standard of performance.
Embodiment 8
Red mud solidified dose of the present embodiment comprises the whisker fibre of 75kg slag powders, 8kg flyash, 6kg Yellow River mud, 8kg catalysis exciting agent, 1kg calcium carbonate.Wherein, the specific surface area of slag powders is not less than 400 ㎡/kg; Flyash uses second class powered coal ash (in the present invention, flyash index is for being more than or equal to three grades of flyash); The particle diameter of Yellow River mud is not more than 100um and the 80um of Yellow River mud tails over and is not more than 30%; Catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; Be respectively 40%, 15%, 30%, 15% containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in catalysis exciting agent, the surface-area of catalysis exciting agent is not less than 400 ㎡/kg.
According to red mud solidified dose: red mud: stone weight ratio is that 1:1.5:3 takes red mud solidified dose, red mud and stone, Homogeneous phase mixing also stirs 8 ~ 15min to low slump concrete state with forced stirrer after adding water, and is applied to hardened ground layer.Constructional method: hardened ground layer construction thickness 250mm, the vigorous denseness 19s of dimension of mixing mixture, shakes with plate vibrator molded, surperficial troweling, overlay film maintenance 28 days.Detect by GB/T50107-2001 " Standard for inspection and assessment of strength of concrete ", index is: ultimate compression strength typical value 32.3MPa, folding strength typical value 4.5 MPa, meets C30 concrete strength standard of performance.
Claims (10)
1. one kind red mud solidified dose, it is characterized in that, according to weight parts, comprising: 20-90 part slag powders, 1-50 part flyash, 1-30 part silt, 5-15 part are containing sodium, potassium, calcium, the catalysis exciting agent of magnesium elements and 0.1-10 part whisker fibre.
2. as claimed in claim 1 red mud solidified dose, it is characterized in that: the specific surface area of described slag powders is not less than 400 ㎡/kg.
3. as claimed in claim 1 or 2 red mud solidified dose, it is characterized in that: the particle diameter of described silt is not more than 100um, the 80um of described silt tails over and is not more than 30%.
4. as claimed in claim 3 red mud solidified dose, it is characterized in that: described catalysis exciting agent by the salt compounds of the oxide compound of sodium, potassium, calcium, magnesium and/or sodium, potassium, calcium, magnesium through pulverizing composite forming; 2-75%, 0.5-20%, 1-55%, 0.5-30% is respectively containing the component of sodium element, the component containing potassium element, the component containing calcium constituent and the weight fraction containing the component of magnesium elements in described catalysis exciting agent.
5. as claimed in claim 4 red mud solidified dose, it is characterized in that: described whisker fibre is calcium carbonate or calcium sulfate crystal whiskers fiber.
6. as claimed in claim 4 red mud solidified dose, it is characterized in that: according to weight parts, comprising: 40-60 part slag powders, 20-30 part flyash, 10-20 part silt, 8-12 part are containing sodium, potassium, calcium, the catalysis exciting agent of magnesium elements and 1-5 part whisker fibre.
7. the red mud solidified dose of application as the solidifying agent of solid brick material as claimed in claim 1.
8. use the red mud solidified dose of method of solidifying red mud and preparing solid brick as claimed in claim 1, it is characterized in that, comprise the following steps: 1) take slag powders, flyash, silt, catalysis exciting agent and whisker fibre respectively according to parts by weight and obtain red mud solidified dose through combination drying; 2) take red mud and step 1) obtained red mud solidified dose respectively and mix, described red mud solidified dose is 1:3-1:8 with red mud weight ratio; 3) to step 2) add water in gained mixed powder after adopt forced stirrer to stir 8 ~ 15min; 4) step 3) gains are sent into brick press and make standard brick.
9. the red mud solidified dose of application as the solidifying agent of Asphalt Pavement Base material as claimed in claim 1.
10. the red mud solidified dose of application as the solidifying agent of hardened ground layer material as claimed in claim 1.
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| CN106082821A (en) * | 2016-06-20 | 2016-11-09 | 安徽金丰新型建材有限公司 | A kind of gangue with antimildew and antibacterial effect is non-burning brick |
| CN107033612A (en) * | 2017-04-13 | 2017-08-11 | 桂林理工大学 | A kind of preparation method of red mud modified pitch |
| CN107237292A (en) * | 2017-07-31 | 2017-10-10 | 黄河水利委员会黄河水利科学研究院 | A kind of Bi Shui villages of Lower Reaches of The Yellow River Kuan Tan areas platform |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110219217B (en) * | 2019-06-19 | 2021-03-02 | 山东省交通科学研究院 | Asphalt stabilized silt basic unit small traffic volume pavement structure |
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| CN104386990B (en) | 2016-07-20 |
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