CN103288407B - Autoclaved brick being main raw material with extracting vanadium from stone coal tailings and preparation method thereof - Google Patents
Autoclaved brick being main raw material with extracting vanadium from stone coal tailings and preparation method thereof Download PDFInfo
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- CN103288407B CN103288407B CN201310198233.2A CN201310198233A CN103288407B CN 103288407 B CN103288407 B CN 103288407B CN 201310198233 A CN201310198233 A CN 201310198233A CN 103288407 B CN103288407 B CN 103288407B
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The present invention relates to a kind of with extracting vanadium from stone coal tailings autoclaved brick that is main raw material and preparation method thereof.Its technical scheme is: first with the white lime of the flyash of the pre-treatment tailings in vanadium extraction of 50 ~ 75wt%, 10 ~ 30wt% and 10 ~ 25wt% for raw material, then add the water of described raw material 12 ~ 18wt%, stir, compression moulding, rest 12h; Again steam-cured still steam press maintenance 5 ~ 8h is put in the adobe after resting, Temperature fall, goes out still, is namely able to the autoclaved brick that extracting vanadium from stone coal tailings is main raw material.Wherein: pre-treatment tailings in vanadium extraction is: the oven dry of extracting vanadium from stone coal tailings is less than 2wt% to water ratio, then is crushed to particle diameter < 3mm, place 2 days, obtain pre-treatment tailings in vanadium extraction; Steam press maintenance temperature is 180 ~ 200 DEG C, and steam press maintenance pressure is 1.15 ~ 1.25MPa.The present invention has the useless feature that rate is high, production efficiency is high and cost is low of profit, prepared with the extracting vanadium from stone coal tailings autoclaved brick intensity that is main raw material high and superior in durability.<!--1-->
Description
Technical field
The invention belongs to autoclaved brick technical field, be specifically related to a kind of with extracting vanadium from stone coal tailings autoclaved brick that is main raw material and preparation method thereof.
Background technology
In the production process of Vanadium Pentoxide in FLAKES, adopt a large amount of acid-containing solution process navajoite, make the pentavalent vanadium in ore transfer in solution, after filtration washing, filter residue through in soda-lime and after be extracting vanadium from stone coal tailings.The main mine of extracting vanadium from stone coal tailings is quartz mutually, also has a small amount of pyrite and calcite.
Due to low containing the bit comparison of vanadium product in bone coal.The Vanadium Pentoxide in FLAKES often producing one ton generally will produce more than 150 ton of tailings, along with extracting vanadium from stone coal industrial expansion, the quantity discharged of extracting vanadium from stone coal tailings is increasing year by year, and the processing mode of extracting vanadium from stone coal tailings mainly concentrates on air storage and pit landfill, produces very large destruction to environment.A large amount of extracting vanadium from stone coal tailings makes a large amount of soil be taken for a long time, stores up for a long time and also causes the harmful ion in extracting vanadium from stone coal tailings to enter water body, be detrimental to health, and Tailings Dam long neglected and in disrepair also causes very large potential safety hazard to society.
Therefore, accelerate to utilize extracting vanadium from stone coal tailings to cause the concern of scientific and technical personnel, current research mainly concentrates on prepares material of construction aspect: as utilized extracting vanadium from stone coal tailings, lime and admixture sintering ceramsite, prepare geopolymer etc. as utilized extracting vanadium from stone coal tailings, kaolin and alkali compound.But still there is the problems such as the low and processing costs of utilization ratio is high to the utilization of extracting vanadium from stone coal tailings in aforesaid method, large batch ofly can not utilize extracting vanadium from stone coal tailings.
Summary of the invention
The present invention is intended to overcome prior art defect, and object is to provide a kind of profit and gives up that rate is high, production efficiency is high and cost is low with the preparation method of the extracting vanadium from stone coal tailings autoclaved brick that is main raw material, the good and superior in durability of the autoclaved brick intensity prepared by the method.
To achieve these goals, the technical solution used in the present invention is: first with the white lime of the flyash of the pre-treatment tailings in vanadium extraction of 50 ~ 75wt%, 10 ~ 30wt% and 10 ~ 25wt% for raw material, then add the water of described raw material 12 ~ 18wt%, stir, compression moulding, rest 12h; Again steam-cured still steam press maintenance 5 ~ 8h is put in the adobe after resting, Temperature fall, goes out still, is namely able to the autoclaved brick that extracting vanadium from stone coal tailings is main raw material;
Wherein: the temperature of steam press maintenance is 180 ~ 200 DEG C, the pressure of steam press maintenance is 1.15 ~ 1.25MPa.
Described pre-treatment tailings in vanadium extraction first the oven dry of extracting vanadium from stone coal tailings is less than 2wt% to water ratio, then is crushed to particle diameter < 3mm, places 2 days, obtain pre-treatment tailings in vanadium extraction; In pre-treatment tailings in vanadium extraction, particle diameter is less than 0.074mm < 15wt%.
Described compression moulding refers to and be pressed into adobe on pressure forming machine, and forming pressure is 15 ~ 20MPa.
Described flyash is the flyash meeting II grade, country ash regulation.
Owing to adopting technique scheme, the present invention compared with prior art has following economical effectiveness:
Because the tailings in raw material of the present invention and flyash are industrial solid castoff, the useless rate of profit is high; Steam press maintenance in steam-cured still, technique is simple, therefore production cost is low.Not only efficiently solve industrial solid castoff and utilize difficult problem, also help environment protection, and the autoclaved brick intensity of preparation is high and superior in durability.
Essential mineral due to the extracting vanadium from stone coal tailings in the present invention is quartz, under the condition of steam press maintenance, generation for hydrated minerals provides a certain amount of active silica for utilizing, form hydrated calcium silicate and drated calcium aluminate in the basic conditions, thus form the mineral supporting autoclaved brick intensity further, therefore the autoclaved brick intensity of preparation is high.
Due to the siliceous raw material that the flyash in the present invention is main, provide active silicon-dioxide and aluminum oxide under suitable condition, also participate in the formation of autoclaved brick simultaneously as a kind of fine fraction aggregate.And concentrate on 0.15mm ~ 2.36mm due to the primary particle size in extracting vanadium from stone coal tailings in the present invention, flyash is as fine fraction spike, efficiently solve the problem that the drying shrinkage that more slightly causes due to tailings is excessive, simultaneously owing to itself containing the SiO of high level
2and Al
2o
3, under the acting in conjunction adopting chemi-excitation and thermal excitation, the crystal such as hydrated calcium silicate and tobermorite can be generated, intensity and the endurance quality of autoclaved brick can be improved while reducing autoclaved brick Investigation of drying shrinkage of high.
Because the white lime in the present invention can provide the Ca needed for hydration reaction (OH)
2, the base substrate after shaping avoids the volumetric expansion produced in unslaked lime hydration process and causes breaking of base substrate; White lime replaces unslaked lime, avoids because the uneven problem of Cracking caused of digestion, between the quiet stopping time simultaneously reducing autoclaved brick, improves the production efficiency of autoclaved brick.
Therefore, the present invention has the useless feature that rate is high, production efficiency is high and cost is low of profit; Prepared with the extracting vanadium from stone coal tailings autoclaved brick intensity that is main raw material high and superior in durability.
Embodiment
Below in conjunction with embodiment, the invention will be further described, the restriction not to its protection domain.
For avoiding repetition, the raw material Unify legislation first this embodiment related to is as follows, repeats no more in embodiment:
Described pre-treatment tailings in vanadium extraction is: first the oven dry of extracting vanadium from stone coal tailings is less than 2wt% to water ratio, then is crushed to particle diameter < 3mm, place 2 days, obtain pre-treatment tailings in vanadium extraction; In pretreated tailings in vanadium extraction, particle diameter is less than 0.074mm < 15wt%.
Described flyash is the flyash meeting II grade, country ash regulation.
Embodiment 1
A kind of with extracting vanadium from stone coal tailings autoclaved brick that is main raw material and preparation method thereof.First with the white lime of the flyash of the pre-treatment tailings in vanadium extraction of 50 ~ 65wt%, 20 ~ 30wt% and 15 ~ 25wt% for raw material, then add the water of described raw material 16 ~ 18wt%, stir, compression moulding, rest 12h; Again steam-cured still steam press maintenance 5 ~ 8h is put in the adobe after resting, Temperature fall, goes out still, is namely able to the autoclaved brick that extracting vanadium from stone coal tailings is main raw material.
In the present embodiment: described compression moulding refers to and be pressed into adobe on pressure forming machine, and the pressure of compression moulding is 15 ~ 18MPa; The temperature of steam press maintenance is 180 ~ 200 DEG C, and the pressure of steam press maintenance is 1.15 ~ 1.25MPa.
Embodiment 2
A kind of with extracting vanadium from stone coal tailings autoclaved brick that is main raw material and preparation method thereof.First with the white lime of the flyash of the pre-treatment tailings in vanadium extraction of 65 ~ 70wt%, 15 ~ 25wt% and 10 ~ 15wt% for raw material, then add the water of described raw material 14 ~ 16wt%, stir, compression moulding, rest 12h; Again steam-cured still steam press maintenance 5 ~ 8h is put in the adobe after resting, Temperature fall, goes out still, is namely able to the autoclaved brick that extracting vanadium from stone coal tailings is main raw material.
In the present embodiment: described compression moulding refers to and be pressed into adobe on pressure forming machine, and the pressure of compression moulding is 16 ~ 19MPa; The temperature of steam press maintenance is 180 ~ 200 DEG C, and the pressure of steam press maintenance is 1.15 ~ 1.25MPa.
Embodiment 3
A kind of with extracting vanadium from stone coal tailings autoclaved brick that is main raw material and preparation method thereof.First with the white lime of the flyash of the pre-treatment tailings in vanadium extraction of 70 ~ 75wt%, 10 ~ 15wt% and 10 ~ 15wt% for raw material, then add the water of described raw material 12 ~ 14wt%, stir, compression moulding, rest 12h; Again steam-cured still steam press maintenance 5 ~ 8h is put in the adobe after resting, Temperature fall, goes out still, is namely able to the autoclaved brick that extracting vanadium from stone coal tailings is main raw material.
In the present embodiment: described compression moulding refers to and be pressed into adobe on pressure forming machine, and the pressure of compression moulding is 17 ~ 20MPa; The temperature of steam press maintenance is 180 ~ 200 DEG C, and the pressure of steam press maintenance is 1.15 ~ 1.25MPa.
This embodiment compared with prior art, has following economical effectiveness:
Because the tailings in this embodiment raw material and flyash are industrial solid castoff, the useless rate of profit is high; Steam press maintenance in steam-cured still, technique is simple, therefore production cost is low.Not only efficiently solve industrial solid castoff and utilize difficult problem, also help environment protection, and the autoclaved brick intensity of preparation is high and superior in durability.
Essential mineral due to the extracting vanadium from stone coal tailings in this embodiment is quartz, under the condition of steam press maintenance, generation for hydrated minerals provides a certain amount of active silica for utilizing, form hydrated calcium silicate and drated calcium aluminate in the basic conditions, thus form the mineral supporting autoclaved brick intensity further, therefore the autoclaved brick intensity of preparation is high.
Due to the siliceous raw material that the flyash in this embodiment is main, provide active silicon-dioxide and aluminum oxide under suitable condition, also participate in the formation of autoclaved brick simultaneously as a kind of fine fraction aggregate.And concentrate on 0.15mm ~ 2.36mm due to the primary particle size in extracting vanadium from stone coal tailings in this embodiment, flyash is as fine fraction spike, efficiently solve the problem that the drying shrinkage that more slightly causes due to tailings is excessive, simultaneously owing to itself containing the SiO of high level
2and Al
2o
3, under the acting in conjunction adopting chemi-excitation and thermal excitation, the crystal such as hydrated calcium silicate and tobermorite can be generated, intensity and the endurance quality of autoclaved brick can be improved while reducing autoclaved brick Investigation of drying shrinkage of high.
Because the white lime in this embodiment can provide the Ca needed for hydration reaction (OH)
2, the base substrate after shaping avoids the volumetric expansion produced in unslaked lime hydration process and causes breaking of base substrate; White lime replaces unslaked lime, avoids because the uneven problem of Cracking caused of digestion, between the quiet stopping time simultaneously reducing autoclaved brick, improves the production efficiency of autoclaved brick.
Therefore, this embodiment has the useless feature that rate is high, production efficiency is high and cost is low of profit; Prepared with the extracting vanadium from stone coal tailings autoclaved brick intensity that is main raw material high and superior in durability.
Claims (4)
1. the preparation method of the autoclaved brick that is main raw material with extracting vanadium from stone coal tailings, it is characterized in that elder generation with the pre-treatment tailings in vanadium extraction of 50 ~ 75wt%, the flyash of 10 ~ 30wt% and the white lime of 10 ~ 25wt% for raw material, then the water of described raw material 12 ~ 18wt% is added, stir, compression moulding, rest 12h; Again steam-cured still steam press maintenance 5 ~ 8h is put in the adobe after resting, Temperature fall, goes out still, is namely able to the autoclaved brick that extracting vanadium from stone coal tailings is main raw material;
Wherein: the temperature of steam press maintenance is 180 ~ 200 DEG C, the pressure of steam press maintenance is 1.15 ~ 1.25MPa;
Described pre-treatment tailings in vanadium extraction first the oven dry of extracting vanadium from stone coal tailings is less than 2wt% to water ratio, then is crushed to particle diameter < 3mm, places 2 days, obtain pre-treatment tailings in vanadium extraction; In pre-treatment tailings in vanadium extraction, particle diameter is less than 0.074mm < 15wt%.
2., according to claim 1 with the preparation method of the extracting vanadium from stone coal tailings autoclaved brick that is main raw material, it is characterized in that described compression moulding refers to and be pressed into adobe on pressure forming machine, forming pressure is 15 ~ 20MPa.
3., according to claim 1 with the preparation method of the extracting vanadium from stone coal tailings autoclaved brick that is main raw material, it is characterized in that described flyash is the flyash meeting II grade, country ash regulation.
4. with the autoclaved brick that extracting vanadium from stone coal tailings is main raw material, it is characterized in that described autoclaved brick be according to any one of claims 1 to 3 item with the autoclaved brick being main raw material with extracting vanadium from stone coal tailings prepared by the preparation method of the extracting vanadium from stone coal tailings autoclaved brick that is main raw material.
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| CN103964799B (en) * | 2014-05-04 | 2016-06-15 | 临沧师范高等专科学校 | The steam-pressing brisk and preparation method thereof being primary raw material with brown coal germanium tailings |
| CN107473713B (en) * | 2017-09-21 | 2020-09-01 | 攀枝花学院 | Preparation method for square bricks |
| CN108484073A (en) * | 2018-02-06 | 2018-09-04 | 内江德天力建筑材料有限公司 | A kind of thick slag hydrothermal curing brick and its production technology |
| CN110981317B (en) * | 2019-12-27 | 2022-03-04 | 河北中科智源新材料技术有限公司 | Method for preparing ecological building material brick by recycling vanadium-containing steel slag with value added |
| CN113929412B (en) * | 2021-12-16 | 2022-03-08 | 湖南省交通科学研究院有限公司 | Recycling treatment method and paving material for stone coal vanadium extraction tailings |
Citations (1)
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| CN102765918A (en) * | 2012-06-30 | 2012-11-07 | 安徽中龙建材科技有限公司 | Method for manufacturing aerated building blocks by doped navajoite tailings |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102765918A (en) * | 2012-06-30 | 2012-11-07 | 安徽中龙建材科技有限公司 | Method for manufacturing aerated building blocks by doped navajoite tailings |
Non-Patent Citations (2)
| Title |
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| 用石煤提钒酸浸渣制备蒸压砖;胡芳芳等;《金属矿山》;20121031(第10期);第149-152页 * |
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