CN105669142A - Method for producing urban comprehensive pipe rack concrete culvert pipe by utilizing molybdenum tailings - Google Patents

Method for producing urban comprehensive pipe rack concrete culvert pipe by utilizing molybdenum tailings Download PDF

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Publication number
CN105669142A
CN105669142A CN201610130923.8A CN201610130923A CN105669142A CN 105669142 A CN105669142 A CN 105669142A CN 201610130923 A CN201610130923 A CN 201610130923A CN 105669142 A CN105669142 A CN 105669142A
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China
Prior art keywords
aggregate
pipe
parts
concrete culvert
steam
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Pending
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CN201610130923.8A
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Chinese (zh)
Inventor
于占泉
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Chifeng Jinghuan Energy Saving Building Material Manufacturing Co Ltd
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Chifeng Jinghuan Energy Saving Building Material Manufacturing Co Ltd
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Priority to CN201610130923.8A priority Critical patent/CN105669142A/en
Publication of CN105669142A publication Critical patent/CN105669142A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/12Waste materials; Refuse from quarries, mining or the like
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/2015Sulfate resistance
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a method for producing an urban comprehensive pipe rack concrete culvert pipe by utilizing molybdenum tailings and belongs to the technical field of molybdenum tailing comprehensive utilization and the field of building materials. The method for producing the urban comprehensive pipe rack concrete culvert pipe by utilizing the molybdenum tailings comprises the following steps: (1) pretreating the molybdenum tailings; (2) weighing, burdening, stirring and pouring; (3) carrying out maintenance; (4) demoulding, and cutting; and (5) carrying out steam curing, wherein maintenance system temperature is 40-65 DEG C, maintenance time is 2-3 hours, temperature of a steam curing chamber during steam curing is 140-160 DEG C, pressure of the steam curing chamber is 1.0-1.3MPa, and steam curing time is 5-8 hours; and the following components in ratio are adopted during burdening: 70-80 parts of aggregate, 20-25 parts of quicklime, 12-15 parts of cement, 0.5-1 part of aluminum paste and 16 parts of water. The method for producing the urban comprehensive pipe rack concrete culvert pipe by utilizing the molybdenum tailings has the advantages that a large amount of molybdenum tailing aggregates are doped in configuration for producing a comprehensive pipe rack, production cost of an underground culvert pipe is reduced, usage amount of cement is low, and the aims of saving energy, utilizing waste, saving resources and protecting the environment are achieved.

Description

A kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great
Technical field
The present invention relates to molybdic tailing technical field of comprehensive utilization and building materials field, it is specifically related to a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great.
Background technology
Along with the develop rapidly of urbanization process, industry and covil construction increase day by day, and the red brick of clay needs to consume a large amount of clay, and existing oneself is prohibited employing by country. Each Zao Zhuan enterprise adopts different methods to produce fragment of brick one after another. Wherein relatively more representational non-burning brick be coagulating cement cob brick and flyash steamed brick, the brick of these kinds adopts the method compression moulding that cement, flyash, sandstone, lime and part admixture add water and mix. But, along with non-burning brick is applied, manufacturing enterprise and quantity constantly increase, and competition is fierce. Meanwhile, owing to the raw-material prices such as cement constantly go up so that coagulating cement cob brick cost.
Along with the development of molybdenum ore industry, molybdic tailing increases day by day. Molybdenum content in ore is considerably less, usually mainly mine tailing is adopted landfill disposal after extracting useful component, and mine tailing accounts for more than 98%. This kind for the treatment of process labor intensive and material resources, take a large amount of land resources, also there is potential safety hazard. How turning waste into wealth, change waste material is resource, has become a research focus.
Molybdic tailing belongs to solid waste, is called for short solid waste. Practice shows, cement and concrete is one of the most important industry outlet of solid wastes recycling, and concrete industry is to the concern of solid wastes recycling and expects also day by day to heat up. China is domestic built Article 1 conurbation underground pipe gallery in 1958 under the Tian'anmen Square, Beijing, and afterwards, the construction of pipe gallery never obtains strong promotion. Until the nineties, Tianjin new station, Shanghai Pudong New Area just start to have built the pipe gallery of China compared with tool scale. Along with the high standard requirement of the lifting of china's overall national strength, particularly urban construction, the market outlook of underground pipe gallery are relatively big, and the research about underground pipe gallery also gets more and more. If by the solid waste utilization of resources to, in the construction of underground pipe gallery, will well use solid waste resource, it is achieved the recycling of refuse, reduce solid waste to the destruction of environment simultaneously, meet environmental protection theory.
It is few that present China utilizes molybdic tailing to produce pipe gallery producer quantity, most industrial scale is less, technical force of production is weak, the production efficiency of most producer is lower, and cement consumption is big, and the rate of utilization of molybdic tailing is low, labour intensity is big, poor working environment, unstable product quality, especially can not meet building requirements actually in impervious, contraction and outward appearance.
Summary of the invention
In order to overcome, existing production city integrated pipe corridor concrete culvert pipe with great cement consumption is big and poor product quality; and the deficiency that under utilizing molybdic tailing grown place, culvert pipe technique is immature; the present invention provides a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great; the method is taking cement, treated molybdic tailing as main starting material; add the underground pipe gallery of a small amount of Additive Production; the molybdic tailing accounting that this product uses is bigger; the cement amount used is less; there is energy-conserving profit waste, economize on resources and the effect of protection of the environment, belong to green building productions.
The technical solution adopted for the present invention to solve the technical problems is:
Utilizing molybdic tailing to produce a method for city integrated pipe corridor concrete culvert pipe with great, described method comprises the following steps:
(1) molybdic tailing pre-treatment: molybdic tailing carrying out ore grinding, broken ore deposit and magnetic separation process, afterwards by flotation, obtains the aggregate of different-grain diameter, mass loss≤16% after aggregate circulation, the granularity 0.1 ~ 15mm of aggregate, containing shale amount≤3%;
(2) weigh, prepare burden, stir and build: according to the mass fraction, the proportioning of various raw material is as follows: 70 ~ 80 parts, aggregate, unslaked lime 20 ~ 25 parts, cement 12 ~ 15 parts, aluminium cream 0.5 ~ 1 part and 16 parts, water, unslaked lime obtains unslaked lime powder through broken and powder mill, the suspension of 9% ~ 12% made by aluminium cream, proportionally weighing and insert stirring system stirring and make slurry, the slurry fully mixed is poured in shaping mould;
(3) maintenance: forming mould is put into curing system and carries out maintenance, curing temperature 40 ~ 65 DEG C, curing time is 2 ~ 3h;
(4) demoulding, cutting: maintenance takes off mould after terminating, and then cuts, obtain pipe gallery work in-process;
(5) steam-cured: pipe gallery work in-process to be put into steam-cured room constant temperature and pressure steam-cured, the temperature of described steam-cured room is 140 ~ 160 DEG C, and steam-cured chamber pressure is 1.0 ~ 1.3MPa, and the steam-cured time is 5 ~ 8h.
Preferably, molybdic tailing SiO described in step (1)2Content >=40%, ensures the hardness of the pipe gallery concrete culvert pipe with great produced.
Preferably, the aggregate described in step (1) reaches following index: by mass content, needle-like and platy shaped particle≤25%, loss on ignition≤15%, SO3≤ 2%, aggregate plays the effect of skeleton, transmits stress, suppresses to shrink, prevents cracking; In aggregate, needle-like and platy shaped particle content control within the specific limits, ensure concrete intensity, because needle-like and platy shaped particle content directly affect the voidage of aggregate in aggregate, needle-like and platy shaped particle are fewer, voidage is more little, and real long-pending rate is bigger, and concrete intensity is more big; In loss on ignition restriction aggregate, the content of impurity, ensures concrete quality; SO3Content too much time can cause concrete hardening after there is volume expanded destruction, cause concrete structure to ftracture, even collapse, it is necessary to SO3Content limit, ensure concrete quality.
Preferably, aggregate size is fine aggregate at the particle of 0.1 ~ 5mm, and aggregate size 5 ~ 15mm is coarse aggregate; In aggregate, fine aggregate and coarse aggregate mass content are than being (2 ~ 5): (4 ~ 6). Fine aggregate is the granular loose material playing skeleton or filling effect in concrete; Coarse aggregate size is relatively big, and intensity is relatively big, plays skeleton function, it is possible to the effective rigidity improving structure, avoids concrete and cause Stress resort due to secondary loading, solve intensity and cannot play the underreinforced defect of rigidity.
Preferably, by mass content, effective CaO >=60% of the unslaked lime described in step (2), MgO≤5%, the fineness of calcium lime powder is: calcium lime powder crosses 900 holes/square centimeter sieve, the amount of tailing over≤50%. Unslaked lime provides effective calcium oxide in this system, make it under hydrothermal conditions with the SiO in siliceous material2、Al2O3Effect, generates hydrated calcium silicate and drated calcium aluminate, thus makes goods obtain intensity.
Preferably, the cement described in step (2) is P.O42.5R, and 28 days intensity is 46.7MPa.
It is an advantage of the invention that: the present invention is by being used for molybdic tailing producing city integrated pipe corridor concrete culvert pipe with great, achieve the recycling to molybdic tailing, reduce the production cost of underground culvert pipe, simultaneously by adding suitable admixture, ensure that the quality of obtained culvert pipe, the product weathering resistance produced and compactness are better, meet every index request of underground pipe gallery.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the present invention.
Embodiment
Molybdic tailing used for embodiment 1 ~ embodiment 3 is carried out chemical composition analysis, and table 1 is molybdic tailing main chemical compositions of the present invention.
Table 1 molybdic tailing main chemical compositions
Embodiment 1:
(1) molybdic tailing pre-treatment: molybdic tailing is carried out ore grinding, broken ore deposit and magnetic separation process, afterwards by flotation, obtains the aggregate of different-grain diameter, by mass content, aggregate loses 16% after circulating, and the granularity 0.1 ~ 15mm of aggregate, containing mud 3%;
(2) weigh, prepare burden, stir and build: according to the mass fraction, the proportioning of various raw material is as follows: 70 parts, aggregate, unslaked lime 25 parts, cement 15 parts, aluminium cream 1 part and 16 parts, water, wherein in aggregate, the mass ratio of fine aggregate and coarse aggregate is 2:6, unslaked lime obtains unslaked lime powder through broken and powder mill, the suspension of 9% made by aluminium cream, proportionally weighing and insert stirring system stirring and make slurry, the slurry fully mixed is poured in shaping mould;
(3) maintenance: forming mould is put into curing system and carries out maintenance, curing temperature 40 DEG C, curing time is 2h;
(4) demoulding, cutting: maintenance takes off mould after terminating, and then cuts, obtain pipe gallery work in-process;
(5) steam-cured: pipe gallery work in-process to be put into steam-cured room constant temperature and pressure steam-cured, the temperature of described steam-cured room is 140 DEG C, and steam-cured chamber pressure is 1.0MPa.
Embodiment 2:
(1) molybdic tailing pre-treatment: molybdic tailing is carried out ore grinding, broken ore deposit and magnetic separation process, afterwards by flotation, obtains the aggregate of different-grain diameter, mass loss 14% after control aggregate circulation, the granularity 0.1 ~ 15mm of aggregate, containing shale amount 2%;
(2) weigh, prepare burden, stir and build: according to the mass fraction, the proportioning of various raw material is as follows: 80 parts, aggregate, unslaked lime 20 parts, cement 12 parts, aluminium cream 0.5 part and 16 parts, water, wherein in aggregate, the mass ratio of fine aggregate and coarse aggregate is 5:4, unslaked lime obtains unslaked lime powder through broken and powder mill, the suspension of 10% made by aluminium cream, proportionally weighing and insert stirring system stirring and make slurry, the slurry fully mixed is poured in shaping mould;
(3) maintenance: forming mould is put into curing system and carries out maintenance, curing temperature 50 DEG C, curing time is 2.5h;
(4) demoulding, cutting: maintenance takes off mould after terminating, and then cuts, obtain pipe gallery work in-process;
(5) steam-cured: pipe gallery work in-process to be put into steam-cured room constant temperature and pressure steam-cured, the temperature of described steam-cured room is 150 DEG C, and steam-cured chamber pressure is 1.2MPa.
Embodiment 3:
(1) molybdic tailing pre-treatment: molybdic tailing is carried out ore grinding, broken ore deposit and magnetic separation process, afterwards by flotation, obtains the aggregate of different-grain diameter, mass loss 12% after control aggregate circulation, the granularity 0.1 ~ 15mm of aggregate, containing shale amount 2%;
(2) weigh, prepare burden, stir and build: according to the mass fraction, the proportioning of various raw material is as follows: 75 parts, aggregate, unslaked lime 23 parts, cement 13 parts, aluminium cream 0.8 part and 16 parts, water, wherein in aggregate, the mass ratio of fine aggregate and coarse aggregate is 3.5:5, unslaked lime obtains unslaked lime powder through broken and powder mill, the suspension of 0.8% made by aluminium cream, proportionally weighing and insert stirring system stirring and make slurry, the slurry fully mixed is poured in shaping mould;
(3) maintenance: forming mould is put into curing system and carries out maintenance, curing temperature 65 DEG C, curing time is 3h;
(4) demoulding, cutting: maintenance takes off mould after terminating, and then cuts, obtain pipe gallery work in-process;
(5) steam-cured: pipe gallery work in-process to be put into steam-cured room constant temperature and pressure steam-cured, the temperature of described steam-cured room is 160 DEG C, and steam-cured chamber pressure is 1.3MPa.
As shown in table 2, it is the product performance detection data that embodiment 1, embodiment 2 and embodiment 3 are produced, the pipe gallery of data sheet open-birth output meets the expected requirements.
Table 2 product performance detection data
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and not to the restriction of the mode of enforcement. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without the need to also cannot all enforcement modes be given exhaustive. And the apparent change thus amplified out or variation are still among protection scope of the present invention.

Claims (6)

1. one kind utilizes the method that molybdic tailing produces city integrated pipe corridor concrete culvert pipe with great, it is characterised in that: described method comprises the following steps:
(1) molybdic tailing pre-treatment: molybdic tailing carrying out ore grinding, broken ore deposit and magnetic separation process, afterwards by flotation, obtains the aggregate of different-grain diameter, mass loss≤16% after aggregate circulation, the granularity 0.1 ~ 15mm of aggregate, containing shale amount≤3%;
(2) weigh, prepare burden, stir and build: according to the mass fraction, the proportioning of various raw material is as follows: 70 ~ 80 parts, aggregate, unslaked lime 20 ~ 25 parts, cement 12 ~ 15 parts, aluminium cream 0.5 ~ 1 part and 16 parts, water, unslaked lime obtains unslaked lime powder through broken and powder mill, the suspension of 9% ~ 12% made by aluminium cream, proportionally weighing and insert stirring system stirring and make slurry, the slurry fully mixed is poured in shaping mould;
(3) maintenance: forming mould is put into curing system and carries out maintenance, curing temperature 40 ~ 65 DEG C, curing time is 2 ~ 3h;
(4) demoulding, cutting: maintenance takes off mould after terminating, and then cuts, obtain pipe gallery work in-process;
(5) steam-cured: pipe gallery work in-process to be put into steam-cured room constant temperature and pressure steam-cured, the temperature of described steam-cured room is 140 ~ 160 DEG C, and steam-cured chamber pressure is 1.0 ~ 1.3MPa, and the steam-cured time is 5 ~ 8h.
2. a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great as claimed in claim 1, it is characterised in that: the molybdic tailing SiO by mass content, described in step (1)2≥40%。
3. a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great as claimed in claim 1, it is characterized in that: by mass content, the aggregate described in step (1) reaches following index: needle-like and platy shaped particle≤25%, loss on ignition≤15%, SO3≤2%。
4. a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great as claimed in claim 3, it is characterised in that: aggregate size is fine aggregate at the particle of 0.1 ~ 5mm, and aggregate size 5 ~ 15mm is coarse aggregate;In aggregate, fine aggregate and coarse aggregate mass content are than being (2 ~ 5): (4 ~ 6).
5. a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great as claimed in claim 1, it is characterized in that: by mass content, effective CaO >=60% of the unslaked lime described in step (2), MgO≤5%, the fineness of calcium lime powder is: calcium lime powder crosses 900 holes/square centimeter sieve, the amount of tailing over≤50%.
6. a kind of method utilizing molybdic tailing to produce city integrated pipe corridor concrete culvert pipe with great as claimed in claim 1, it is characterised in that: the cement described in step (2) is P.O42.5R, and 28 days intensity is 46.7MPa.
CN201610130923.8A 2016-03-09 2016-03-09 Method for producing urban comprehensive pipe rack concrete culvert pipe by utilizing molybdenum tailings Pending CN105669142A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107244865A (en) * 2017-06-05 2017-10-13 山东龙泉管道工程股份有限公司 High-strength concrete using fines molybdic tailing and barren rock and preparation method thereof
CN114538860A (en) * 2022-03-25 2022-05-27 沈阳中泽环境工程有限公司 Border stone prepared from molybdenum-selecting tailings and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103396158A (en) * 2013-07-31 2013-11-20 浙江泰正钼业开发有限公司 Antibacterial molybdenum mill tailings aerated concrete block and preparation method thereof
CN104909643A (en) * 2015-05-08 2015-09-16 黄贺明 Assembly type lightweight thin wall integrated pipe gallery and production method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103396158A (en) * 2013-07-31 2013-11-20 浙江泰正钼业开发有限公司 Antibacterial molybdenum mill tailings aerated concrete block and preparation method thereof
CN104909643A (en) * 2015-05-08 2015-09-16 黄贺明 Assembly type lightweight thin wall integrated pipe gallery and production method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107244865A (en) * 2017-06-05 2017-10-13 山东龙泉管道工程股份有限公司 High-strength concrete using fines molybdic tailing and barren rock and preparation method thereof
CN114538860A (en) * 2022-03-25 2022-05-27 沈阳中泽环境工程有限公司 Border stone prepared from molybdenum-selecting tailings and preparation method thereof

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