CN103396158B - A kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof - Google Patents

A kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof Download PDF

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CN103396158B
CN103396158B CN201310329547.1A CN201310329547A CN103396158B CN 103396158 B CN103396158 B CN 103396158B CN 201310329547 A CN201310329547 A CN 201310329547A CN 103396158 B CN103396158 B CN 103396158B
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slurry
building block
concrete building
steam
antibacterial
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CN103396158A (en
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季小华
王建仁
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Zhejiang Taizheng Molybdenum Industry Development Co Ltd
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Zhejiang Taizheng Molybdenum Industry Development Co Ltd
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    • 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 belongs to building material field, especially relate to a kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof.Does is this molybdenum tailings air-entrained concrete building block, made up of following each raw materials by weight: molybdenum tailings 65 ~ 78%, unslaked lime 12 ~ 18%, cement? 5 ~ 18%, gypsum 2 ~ 4%, aluminium cream 0.08 ~ 0.09%, inorganic antiseptic? 0.91 ~ 0.92%.The preparation method of this Antibacterial molybdenum tailings air-entrained concrete building block, described preparation method comprises the following steps: (1) raw materials pretreatment; B () unslaked lime, through broken, grinding, obtains unslaked lime powder; C the aluminium cream suspension of 8 ~ 10% made by aluminium cream by (); (2) prepare burden, pour into a mould; (3) precuring; (4) demoulding, cutting; (5) steam-cured.Antibacterial molybdenum tailings air-entrained concrete building block quality of the present invention is light, good anti-bacterial effect, excellent thermal insulation performance, ultimate compression strength is high, compensate for the deficiency that powder ash air-entrained concrete building block ultimate compression strength is low, can replace clay brick completely, use range is wide, method technique of the present invention is simple, and product energy consumption is low.

Description

A kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof
Technical field
The invention belongs to building material field, especially relate to a kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof.
Background technology
Along with the raising of resources and environment protective awareness, with the havoc of a large amount of consumption of resource and ecotope, for cost exchanges for, non-Sustainable development more and more can not meet the demand of society to traditional building material, therefore novel green building materials are developing direction of construction industry under the new situation, along with the fast development of China's economy, the demand of construction to building materials of a large amount of Infrastructure constantly increases, according to incompletely statistics, in China's building construction material, 70% is materials for wall, the resource maximum due to traditional body of wall materials'use is clay, Wingdale and sandstone, serious to soil mine resources consumption, and it is irrecoverable, moreover, the building block concrete that traditional concrete material is made is than great, the utilization ratio of raw material is not high, also greatly increases the load of buildings.
The make of refuse of molybdenum ore production industry is large, take up room in stacking process large, also easily cause environmental pollution, by analysis, in mine tailing, quartz content is very high, and therefore mine tailing can as the novel starting material of effective sand aerated concrete block, to realize the comprehensive utilization to molybdenum ore production industry mine tailing, turn waste into wealth, resource utilization improves greatly, avoids environmental pollution.
In addition; air-entrained concrete building block due to surface and inside be distributed with some micropores; although there is the microorganism to existing to kill in steam-cured process; but gas concrete is in use due to the existence of the moisture in environment, microorganism; gas concrete is easy cooperating microorganisms also; also usually have growing of each quasi-microorganism in the micropore of air-entrained concrete building block inside, cause air-entrained concrete building block surface to be very easily chapped from the cold, affect the work-ing life of gas concrete.Therefore need to develop a kind of air-entrained concrete building block that can be effectively antibacterial.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, a kind of Antibacterial molybdenum tailings air-entrained concrete building block is provided, this Antibacterial molybdenum tailings air-entrained concrete building block quality is light, good anti-bacterial effect, excellent thermal insulation performance, also has higher ultimate compression strength, compensate for the deficiency that powder ash air-entrained concrete building block ultimate compression strength is low, can replace clay brick completely, use range is wide.
Another object of the present invention is to provide a kind of preparation method of Antibacterial molybdenum tailings air-entrained concrete building block, and this preparation method's technique is simple, and product energy consumption is low.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of Antibacterial molybdenum tailings air-entrained concrete building block, is made up of following each raw materials by weight: molybdenum tailings 65 ~ 78%, unslaked lime 12 ~ 18%, cement 5 ~ 18%, gypsum 2 ~ 4%, aluminium cream 0.08 ~ 0.09%, inorganic antiseptic 0.91 ~ 0.92%.
As preferably, be made up of following each raw materials by weight: molybdenum tailings 71%, unslaked lime 16%, cement 9%, gypsum 3%, aluminium cream 0.085%, inorganic antiseptic 0.915%.
As preferably, described inorganic antiseptic is zinc oxide or cupric oxide.
As preferably, described molybdenum tailings containing water gaging be 12 ~ 15%, described molybdenum tailings is starched by molybdic tailing and is obtained through concentrated, separation, concrete preparation technology is as follows: by massfraction be 15 ~ 20% molybdic tailing slurry be placed in settling tank precipitation, concentrated, make the molybdenum ore tail slurry massfraction of settling tank bottom reach 50%, be then separated through filter and obtain molybdenum tailings.
Molybdic tailing slurry slush pump is delivered in the settling tank of filtration, evaporation plant, carry out precipitation concentration, Tailings Slurry concentration is made to reach 50%, then Tailings Slurry is separated by ceramic filter, obtain molybdenum tailings, the slurries filtered out for filter are again squeezed in ceramic filter and are processed further, filtrate water recycle and reuse.Molybdic tailing slurry obtains molybdenum tailings by filtration, Dehydration, filtrate water cycle utilizes, improve the utilization ratio of the water resources of Mineral Processing Industry on the one hand, on the other hand, molybdenum tailings comparatively reduces in molybdic tailing slurry occupation of land space greatly, eradicate stacking molybdic tailing from security standpoint and starched the potential safety hazard brought, effectively improve surrounding enviroment quality simultaneously.
A preparation method for Antibacterial molybdenum tailings air-entrained concrete building block, described preparation method comprises the following steps:
(1) raw materials pretreatment: tailings ore deposit and gypsum are mixed in proportion by (a), then adds the levigate slurry of the levigate acquisition of suitable quantity of water, for subsequent use; B () unslaked lime obtains unslaked lime powder through broken, grinding; C the aluminium cream suspension of 8 ~ 10% made by aluminium cream by ();
(2) prepare burden, pour into a mould: above-mentioned each raw material is inserted in proportion in stirrer to stir and make slurry, then obtained slurry is injected in mould;
(3) precuring: be placed in by mould after cast and bring up indoor, in 50 ~ 70 DEG C of precuring 1.5 ~ 2h;
(4) demoulding, cutting: slough mould after precuring terminates, then carry out rip cutting and crosscut, obtains molybdenum tailings air-entrained concrete building block work in-process;
(5) steam-cured: Antibacterial molybdenum tailings air-entrained concrete building block work in-process step (4) obtained are placed in steam-cured indoor constant voltage steam-cured acquisition Antibacterial molybdenum tailings air-entrained concrete building block finished product, described steam-cured indoor steam pressure is 1.3 ~ 1.5Mpa, temperature is 180 ~ 185 DEG C, and constant voltage steam-cured time is 5 ~ 8h.
As preferably, tailings ore deposit and gypsum levigate acquisition slurry in ball mill in step (1), described slurry first flows into size-mixing tank, by quantitatively adding the levigate slurry that water furnishing concentration is 30 ~ 50%, then pumps into batching slip storage tank for subsequent use.Molybdenum tailings and gypsum are first levigate in ball mill, due to tailings ore deposit in ball mill, gypsum and water ratio on ball mill to grind efficiency impact very large, the batching quality of concentration on follow-up each raw material of slurry also affects very large simultaneously, therefore the present invention controls in two steps according to two objects, first for the purpose of the optimum working efficiency protecting whole ball mill, the ratio of reasonably combined tailings ore deposit, gypsum and water; Above-mentioned raw materials, after levigate acquisition slurry, is being mixed into object with the best realizing follow-up raw material, is mixing the slurry of levigate acquisition through moisturizing, obtains the levigate slurry of 30 ~ 50%, makes follow-up blending process can realize the best blending dispersion of each raw material.
As preferably, described levigate stock pump enters in pipeline the Density Measuring Instrument be provided with for controlling levigate slurry proportion.Density of setting instrument, can control moisturizing according to the value of feedback of Density Measuring Instrument in real time in time, guarantees the homogeneous, reliable of levigate stock quality.
The invention has the beneficial effects as follows:
(1) the present invention adopts molybdenum tailings to obtain air-entrained concrete building block as main raw material, achieves the comprehensive utilization of molybdenum tailings, greatly reduces the output of molybdenum ore production industry solid waste, reduce the dependence to limited mineral wealth;
(2) each component collocation of Antibacterial molybdenum tailings gas concrete of the present invention rationally, adopt aluminium cream as air entrapment agent, because molybdenum tailings quality of the present invention is homogeneous, with the reasonable ratio of gypsum, water in molybdenum tailings preprocessing process, the follow-up aluminium cream usage quantity as air entrapment agent is greatly reduced, but do not affect the quality of molybdenum tailings air-entrained concrete building block, described molybdenum tailings air-entrained concrete building block inner air vent is evenly distributed;
(3) inorganic antiseptic added in Antibacterial molybdenum tailings air-entrained concrete building block of the present invention effectively can stop molybdenum tailings air-entrained concrete building block surface and the growing of inner microorganism, extend the work-ing life of Antibacterial molybdenum tailings air-entrained concrete building block, expand its use range, the impact by severe environment for use (as moist, foreign material grow) is little simultaneously.
(4) Antibacterial molybdenum tailings air-entrained concrete building block quality of the present invention is light, effectively can reduce the load of buildings, excellent thermal insulation performance, also have higher ultimate compression strength;
(5) Antibacterial molybdenum tailings air-entrained concrete building block of the present invention has good workability, and be easy to cutting in use procedure, can not burst apart, in cutting process, dust is few.
(6) preparation method's rational technology of the present invention, production energy consumption are low; precuring condition is through optimizing; under this precuring condition; not easily produce feel suffocated, bubbling, collapse mould or the bad phenomenon of discontented mould occurs; normal base substrate acceleration sclerosis of having got angry in mould can be promoted simultaneously; shorten the normal setting time of base substrate, thus shorten the production cycle.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in further detail.
embodiment 1:
A kind of Antibacterial molybdenum tailings air-entrained concrete building block, each raw material as shown in Table 1 and weight percent composition, wherein inorganic antiseptic adopts cupric oxide.
The preparation method of above-mentioned Antibacterial molybdenum tailings air-entrained concrete building block is as follows:
(1) raw materials pretreatment:
A tailings ore deposit and gypsum are mixed in proportion by (), add in ball mill, add suitable quantity of water, open spheroidal graphite machine by levigate for above-mentioned raw materials acquisition slurry, described slurry first flows into size-mixing tank, by quantitatively adding the levigate slurry that water furnishing concentration is 30%, then batching slip storage tank is pumped into for subsequent use, described levigate stock pump enters in pipeline the Density Measuring Instrument installed for controlling levigate slurry proportion, controls moisturizing in time with the real-time value of feedback according to Density Measuring Instrument, homogeneous with the quality realizing levigate slurry;
B () unslaked lime obtains unslaked lime powder through broken, grinding: lump lime, first through jaw crushing crusher machine, is then sent into ball mill and carried out grinding, obtain limestone powder;
C the aluminium cream suspension of 8% made by aluminium cream by ();
(2) prepare burden, pour into a mould: above-mentioned each raw material is inserted in proportion in stirrer to stir and make slurry, then obtained slurry is injected in mould:
(3) precuring: be placed in by mould after cast and bring up indoor, in 50 DEG C of precuring 2h;
(4) demoulding, cutting: slough mould after precuring terminates, then carry out rip cutting and crosscut, obtains Antibacterial molybdenum tailings air-entrained concrete building block work in-process;
(5) steam-cured: Antibacterial molybdenum tailings air-entrained concrete building block work in-process step (4) obtained are placed in steam-cured indoor constant voltage steam-cured acquisition sand aerated concrete block finished product, described steam-cured indoor steam pressure is 1.3Mpa, temperature is 180 DEG C, and constant voltage steam-cured time is 8h.
embodiment 2:
A kind of Antibacterial molybdenum tailings air-entrained concrete building block, each raw material as shown in Table 1 and weight percent composition, wherein inorganic antiseptic adopts zinc oxide.
The preparation method of above-mentioned Antibacterial molybdenum tailings air-entrained concrete building block is as follows:
(1) raw materials pretreatment:
A tailings ore deposit and gypsum are mixed in proportion by (), add in ball mill, add suitable quantity of water, open spheroidal graphite machine by levigate for above-mentioned raw materials acquisition slurry, described slurry first flows into size-mixing tank, by quantitatively adding the levigate slurry that water furnishing concentration is 50%, then batching slip storage tank is pumped into for subsequent use, described levigate stock pump enters in pipeline the Density Measuring Instrument installed for controlling levigate slurry proportion, controls moisturizing in time with the real-time value of feedback according to Density Measuring Instrument, homogeneous with the quality realizing levigate slurry;
B () unslaked lime obtains unslaked lime powder through broken, grinding: lump lime, first through jaw crushing crusher machine, is then sent into ball mill and carried out grinding, obtain limestone powder;
C the aluminium cream suspension of 10% made by aluminium cream by ();
(2) prepare burden, pour into a mould: above-mentioned each raw material is inserted in proportion in stirrer to stir and make slurry, then obtained slurry is injected in mould:
(3) precuring: be placed in by mould after cast and bring up indoor, in 70 DEG C of precuring 1.5h;
(4) demoulding, cutting: slough mould after precuring terminates, then carry out rip cutting and crosscut, obtains Antibacterial molybdenum tailings air-entrained concrete building block work in-process;
(5) steam-cured: Antibacterial molybdenum tailings air-entrained concrete building block work in-process step (4) obtained are placed in steam-cured indoor constant voltage steam-cured acquisition sand aerated concrete block finished product, described steam-cured indoor steam pressure is 1.5Mpa, temperature is 185 DEG C, and constant voltage steam-cured time is 5h.
embodiment 3:
A kind of Antibacterial molybdenum tailings air-entrained concrete building block, each raw material as shown in Table 1 and weight percent composition, wherein inorganic antiseptic adopts cupric oxide.
The preparation method of above-mentioned Antibacterial molybdenum tailings air-entrained concrete building block is as follows:
(1) raw materials pretreatment:
A tailings ore deposit and gypsum are mixed in proportion by (), add in ball mill, add suitable quantity of water, open spheroidal graphite machine by levigate for above-mentioned raw materials acquisition slurry, described slurry first flows into size-mixing tank, by quantitatively adding the levigate slurry that water furnishing concentration is 40%, then batching slip storage tank is pumped into for subsequent use, described levigate stock pump enters in pipeline the Density Measuring Instrument installed for controlling levigate slurry proportion, controls moisturizing in time with the real-time value of feedback according to Density Measuring Instrument, homogeneous with the quality realizing levigate slurry;
B () unslaked lime obtains unslaked lime powder through broken, grinding: lump lime, first through jaw crushing crusher machine, is then sent into ball mill and carried out grinding, obtain limestone powder;
C the aluminium cream suspension of 9% made by aluminium cream by ();
(2) prepare burden, pour into a mould: above-mentioned each raw material is inserted in proportion in stirrer to stir and make slurry, then obtained slurry is injected in mould:
(3) precuring: be placed in by mould after cast and bring up indoor, in 60 DEG C of precuring 2h;
(4) demoulding, cutting: slough mould after precuring terminates, then carry out rip cutting and crosscut, obtains Antibacterial molybdenum tailings air-entrained concrete building block work in-process;
(5) steam-cured: antibacterial sand tailings air-entrained concrete building block work in-process step (4) obtained are placed in steam-cured indoor constant voltage steam-cured acquisition sand aerated concrete block finished product, described steam-cured indoor steam pressure is 1.4Mpa, temperature is 183 DEG C, and constant voltage steam-cured time is 6h.
The each constituent mass per-cent of table 1 Antibacterial molybdenum tailings air-entrained concrete building block
Molybdenum tailings Unslaked lime Cement Gypsum Aluminium cream Inorganic antiseptic
Embodiment 1 65% 12% 18% 4.0% 0.09% 0.91%
Embodiment 2 78% 14% 5% 2.0% 0.08% 0.92%
Embodiment 3 71% 18% 8% 2.0% 0.08% 0.92%
Antibacterial molybdenum tailings air-entrained concrete building block product technology performance test structure of the present invention is as follows:
Antibacterial molybdenum of the present invention adds sand aerated concrete block product technology Performance and quality standard and meets or be better than national autoclave aerated concrete building block standard (GB/T11968-2006), and concrete data are as follows:
The cubic compressive strength of table 2 Antibacterial molybdenum tailings air-entrained concrete building block
Table 2 shows that the three-dimensional ultimate compression strength of Antibacterial molybdenum tailings air-entrained concrete building block of the present invention meets B06 level premium grads standard in GB/T11968-2006.
The dry density of table 3 Antibacterial molybdenum tailings air-entrained concrete building block
Dry density (kg/m3)
Embodiment 1 600
Embodiment 2 589
Embodiment 3 593
Table 3 shows that the dry density that Antibacterial molybdenum tail of the present invention adds sand aerated concrete block meets B06 level premium grads standard in GB/T11968-2006.
The dry shrinkage of table 4 Antibacterial molybdenum tailings air-entrained concrete building block, frost resistance and thermal conductivity
Table 4 shows, the dry shrinkage of Antibacterial molybdenum tailings air-entrained concrete building block of the present invention, frost resistance and thermal conductivity meet B06 level premium grads standard in GB/T11968-2006.
The excellent antibacterial performance of Antibacterial molybdenum tailings air-entrained concrete building block of the present invention, in the environment of relative humidity≤35%, uses more than 5 years, Antibacterial molybdenum tailings air-entrained concrete building block outside surface without mildew, without to be chapped from the cold phenomenon; In the environment of relative humidity 35 ~ 60%, use more than 4 years, Antibacterial molybdenum tailings air-entrained concrete building block outside surface without mildew, without to be chapped from the cold phenomenon; In the environment of relative humidity > 60%, use more than 3 years, Antibacterial molybdenum tailings air-entrained concrete building block outside surface is without mildew, and nothing is chapped from the cold.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.

Claims (4)

1. an Antibacterial molybdenum tailings air-entrained concrete building block, it is characterized in that: be made up of following each raw materials by weight: molybdenum tailings 78%, unslaked lime 14%, cement 5%, gypsum 2%, aluminium cream 0.08%, inorganic antiseptic 0.92%, all reach B06 level premium grads standard according to the cubic compressive strength of described molybdenum tailings air-entrained concrete building block, dry density, drying shrinkage value, frost resistance and thermal conductivity that GB/T11986-2006 detects, described inorganic antiseptic is zinc oxide; Described molybdenum tailings containing water gaging be 12 ~ 15%, described molybdenum tailings is starched by molybdic tailing and is obtained through concentrated, separation, concrete preparation technology is as follows: by massfraction be 15 ~ 20% molybdic tailing slurry be placed in settling tank precipitation, concentrated, the molybdenum ore tail slurry massfraction of settling tank bottom is made to reach 50%, then be separated through filter and obtain molybdenum tailings, preparation method comprises the following steps:
(1) raw materials pretreatment: tailings ore deposit and gypsum are mixed in proportion by (a), then adds the levigate slurry of the levigate acquisition of suitable quantity of water, for subsequent use; B () unslaked lime obtains unslaked lime powder through broken, grinding; C the aluminium cream suspension of 10% made by aluminium cream by ();
(2) prepare burden, pour into a mould: above-mentioned each raw material is inserted in proportion in stirrer to stir and make slurry, then obtained slurry is injected in mould;
(3) precuring: after cast, mould is placed in precuring indoor, in 70 DEG C of precuring 1.5h;
(4) demoulding, cutting: slough mould after precuring terminates, then carry out rip cutting and crosscut, obtains sand aerated concrete block work in-process;
(5) steam-cured: the sand aerated concrete block work in-process that step (4) obtains to be placed in steam-cured indoor constant voltage steam-cured acquisition sand aerated concrete block finished product, described steam-cured indoor steam pressure is 1.5MPa, temperature is 185 DEG C, and constant voltage steam-cured time is 5h.
2. prepare a method for Antibacterial molybdenum tailings air-entrained concrete building block described in claim 1, it is characterized in that: described method comprises the following steps:
(1) raw materials pretreatment: tailings ore deposit and gypsum are mixed in proportion by (a), then adds the levigate slurry of the levigate acquisition of suitable quantity of water, for subsequent use; B () unslaked lime obtains unslaked lime powder through broken, grinding; C the aluminium cream suspension of 10% made by aluminium cream by ();
(2) prepare burden, pour into a mould: above-mentioned each raw material is inserted in proportion in stirrer to stir and make slurry, then obtained slurry is injected in mould;
(3) precuring: after cast, mould is placed in precuring indoor, in 70 DEG C of precuring 1.5h;
(4) demoulding, cutting: slough mould after precuring terminates, then carry out rip cutting and crosscut, obtains sand aerated concrete block work in-process;
(5) steam-cured: the sand aerated concrete block work in-process that step (4) obtains to be placed in steam-cured indoor constant voltage steam-cured acquisition sand aerated concrete block finished product, described steam-cured indoor steam pressure is 1.5MPa, temperature is 185 DEG C, and constant voltage steam-cured time is 5h.
3. a kind of method preparing Antibacterial molybdenum tailings air-entrained concrete building block according to claim 2, it is characterized in that: tailings ore deposit and gypsum levigate acquisition slurry in ball mill in step (1), described slurry first flows into size-mixing tank, by quantitatively adding the levigate slurry that water furnishing concentration is 30 ~ 50%, then pump into batching slip storage tank for subsequent use.
4. a kind of method preparing Antibacterial molybdenum tailings air-entrained concrete building block according to claim 2, is characterized in that: described levigate stock pump enters in pipeline the Density Measuring Instrument be provided with for controlling levigate slurry proportion.
CN201310329547.1A 2013-07-31 2013-07-31 A kind of Antibacterial molybdenum tailings air-entrained concrete building block and preparation method thereof Active CN103396158B (en)

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CN104926250A (en) * 2015-05-22 2015-09-23 蚌埠营军新型墙体材料有限公司 Method for preparing air-added brick from ceramic industry pollutants
CN105272349A (en) * 2015-09-29 2016-01-27 马鞍山杰创塑胶科技有限公司 Mould-proof aerated building block and making method thereof
CN105753413A (en) * 2016-03-09 2016-07-13 赤峰京环节能建材制造有限公司 Method using solid wastes to produce concrete culvert pipe of city comprehensive pipe rack
CN105669142A (en) * 2016-03-09 2016-06-15 赤峰京环节能建材制造有限公司 Method for producing urban comprehensive pipe rack concrete culvert pipe by utilizing molybdenum tailings
CN106904890A (en) * 2017-03-15 2017-06-30 安徽键合科技有限公司 A kind of antibacterial construction material and preparation method thereof

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