CN103964799B - The steam-pressing brisk and preparation method thereof being primary raw material with brown coal germanium tailings - Google Patents
The steam-pressing brisk and preparation method thereof being primary raw material with brown coal germanium tailings Download PDFInfo
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- CN103964799B CN103964799B CN201410181063.1A CN201410181063A CN103964799B CN 103964799 B CN103964799 B CN 103964799B CN 201410181063 A CN201410181063 A CN 201410181063A CN 103964799 B CN103964799 B CN 103964799B
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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 kind of steam-pressing brisk and preparation method thereof being primary raw material with brown coal germanium tailings, the raw material components of this steam-pressing brisk is pretreatment brown coal germanium tailings, flyash, slaked lime, water, additive; After pretreatment brown coal germanium tailings, flyash, slaked lime are dry mixed, add after water and additive continue to stir, by compressing for gained compound, rest, then the steam press maintenance when 1.05Mpa ~ 1.25Mpa, it is the steam-pressing brisk of primary raw material that the process of Temperature fall prepares brown coal germanium tailings; Present invention process energy consumption is little, Mine Tailings Utilization is higher, properties of product are better.
Description
Technical field
The invention belongs to steam-pressing brisk technical field, be specifically related to a kind of steam-pressing brisk and preparation method thereof being primary raw material with brown coal germanium mine tailing.
Background technology
In recent years, along with Building Trade in China sustainable development, building brick, with the comprcssive strength that it is good, become the construction material that consumption is maximum, and steam-pressing brisk, because its technique is simple, less costly, energy consumption is little, increasingly it is used widely. At home and abroad in research, main flyash is that steam-pressing brisk prepared by raw material, and generally to add cement (Yuan Mingliang, Li Kang, Lai Yingming, Deng. fly ash autoclaved brick and preparation method thereof [P] CN103193441A, 2013), but, flyash goes up year by year as New Building Materials price in recent years, cement is as a kind of finished industrial raw material, and price is of a relatively high. Therefore, with various solid waste for raw material production steam-pressing brisk, become the important topic that we must study. At present, though having some researchs is utilize solid waste to prepare steam-pressing brisk for raw material, but the volume of mine tailing is less, additive volume is higher, thus relatively costly (Li Qiuyi, utilize building waste to produce steam-pressing brisk [P] CN101041567,2006), and the current research preparing steam-pressing brisk for primary raw material with brown coal germanium tailings have no report.
In the process carrying germanium, first by brown coal roasting, then adopt substantial amounts of acid-containing solution process germanium-containing smoke dust, germanic therein is transferred in solution, after filtration washing, filtering residue through in soda lime and after be brown coal germanium tailings. Current brown coal germanium tailings mainly takes stacking to process, it is easy to causes the problems such as occupation of land, contaminated environment, also results in very big potential safety hazard simultaneously. Therefore, how utilizing brown coal germanium tailings to cause the concern of scientific research personnel, current research mainly prepares building materials aspect. As: utilize brown coal germanium tailings to prepare sintering ceramsite and baking-free ceramicite, and prepare the research of steam-pressing brisk with brown coal germanium tailings for raw material and have no and report for work. This research adopts brown coal germanium tailings to be matrix composition steam-pressing brisk, to realize the purpose of secondary resource recycling and environmental protection. Present invention process is simple, energy consumption is little, tailings utilization rate high.
Summary of the invention
It is contemplated that overcome existing technological deficiency, it is simple that purpose is to provide a kind of technique, the brown coal germanium tailings that energy consumption is less is the steam-pressing brisk of primary raw material, and this steam-pressing brisk constituent and percentage by weight thereof are pretreatment brown coal germanium tailings 50wt% ~ 65wt%, flyash 10wt% ~ 20wt%, slaked lime 10wt% ~ 15wt%, water 10wt% ~ 15wt%, addition is the additive of slaked lime weight 2.0wt% ~ 2.05wt%;The percentage by weight sum of each component is 100%.
Wherein said additive be one or more in sodium sulfate, calcium sulfate or calcium oxide arbitrarily than mixture.
Described pretreatment brown coal germanium tailings is first to dry to moisture content brown coal germanium tailings less than 1wt%, then < 3mm, obtains pretreatment brown coal germanium tailings to be crushed to granularity; In pretreatment tailings, the particle diameter raw material < 20wt% less than 0.074mm.
The preparation method that another object of the present invention is to provide the steam-pressing brisk being primary raw material with brown coal germanium tailings, concrete operation step is as follows:
(1) pretreatment brown coal germanium tailings, slaked lime, flyash are poured into after being dry mixed 4min ~ 5min in blender, add water and additive continues stirring 3 ~ 5min;
(2) being pressed into adobe after step (1) gained compound ageing 1h ~ 2h, briquetting pressure is 10～20Mpa;
(3) step (2) gained adobe is rested and put into steam-cured still after 6h, being 150～160 DEG C in steam press maintenance temperature, steam press maintenance pressure is 1.05Mpa ~ 1.25Mpa, steam press maintenance 5h ~ 8h under autoclaved condition, Temperature fall, being namely able to brown coal germanium tailings is the steam-pressing brisk of primary raw material.
Heretofore described brown coal germanium tailings refers to be smelted adding chain furnace after the screening of germanic brown coal, coal briquette processed, whirlwind smoke collector, bagroom is adopted to be collected the germanium-containing smoke dust produced in stove, then 8～9mol/L hydrochloric acid solution is adopted germanium-containing smoke dust to be heated leaching, heating-up temperature is for being 80 ~ 90 DEG C, extraction time 4h-8h, germanium is transferred in infusion solution with the form of germanium tetrachloride, is filtered by solution, is neutralized to neutrality through soda lime and namely obtains brown coal germanium tailings after residue washing; The brown coal germanium tailings granularity prepared is relatively thick, the particle diameter tailings more than 3mm > 80%, need to through grinding ability balling-up; Its plasticity index is 12% ~ 14%, and plasticity is medium; The smelting of germanic brown coal adopts conventional method to carry out, as implemented with reference to method in application number 93121175.1.
Owing to have employed technique scheme, the present invention has following beneficial effect:
The problems such as 1, the present invention prepares steam-pressing brisk with brown coal germanium tailings for raw material, provides effective utilization ways for such mine tailing, solves the potential safety hazard that tailings impoundment causes, environmental pollution;
2, in the present invention, brown coal germanium tailings early stage through acidleach and is washed, and mineral surfaces is rougher, and therefore in these mineral, the silica containing activity of institute is higher, is conducive to the carrying out that further hydration reacts, therefore the steam-pressing brisk intensity of preparation is higher;
3, this preparation technology only needs steam press maintenance without high-temperature roasting, has saved production cost, has significantly reduced energy consumption;
4, the slaked lime in the present invention replaces quick lime, it is to avoid digests blank strength decline problem that is uneven and that cause, improves the production efficiency of steam-pressing brisk.
Therefore, the present invention has environmental friendliness, and the advantage that energy consumption is little has widened the raw material sources of steam-pressing brisk, has opened up the new way of brown coal germanium tailings comprehensive utilization, and its product strength is high, superior in durability.
Detailed description of the invention
By the examples below the present invention being described in further detail, but protection scope of the present invention is not limited to described content, in the present embodiment, agents useful for same is if no special instructions, is conventional commercial reagent.
The tailings of brown coal germanium described in embodiment is all from Yunnan ore dressing company, it is by adding chain furnace smelting after the screening of germanic brown coal, coal briquette processed, whirlwind smoke collector, bagroom is adopted to be collected the germanium-containing smoke dust produced in stove, then 8～9mol/L hydrochloric acid solution is adopted germanium-containing smoke dust to be heated leaching, heating-up temperature is for being 80 ~ 90 DEG C, extraction time 4h ~ 8h, germanium is transferred in infusion solution with the form of germanium tetrachloride, solution is filtered, is neutralized to neutrality through soda lime after residue washing and namely obtains brown coal germanium tailings.
Embodiment 1:Preparing with the steam-pressing brisk that brown coal germanium tailings is primary raw material by following raw material, each raw material and percentage by weight be: pretreatment brown coal germanium tailings 50wt%, flyash 20wt%, slaked lime 15wt%, water 14.7wt%, addition are the additive sodium sulfate of slaked lime weight 2wt%.
The preparation process of this brown coal germanium tailings steam-pressing brisk is as follows:
(1) first brown coal germanium tailings is dried to moisture content less than 1wt%, then < 3mm, obtains pretreatment brown coal germanium tailings to be crushed to granularity; In pretreatment tailings, the particle diameter tailings < 20wt% less than 0.074mm;
(2) pretreatment brown coal germanium tailings 50g, flyash 20g, slaked lime 15g are poured into after being dry mixed 4min in blender, add 14.7g water and 0.3g additive sodium sulfate continues stirring 3min;
(3) being pressed into adobe after step (2) gained compound ageing 1h, briquetting pressure is 10Mpa;
(4) step (3) gained adobe being rested and put into steam-cured still after 6h, be 150 DEG C in steam press maintenance temperature, steam press maintenance pressure is 1.05Mpa, steam press maintenance 5h under autoclaved condition, Temperature fall, and being namely able to brown coal germanium tailings is the steam-pressing brisk of primary raw material.
Steam-pressing brisk good looking appearance prepared by the present embodiment, comprcssive strength is 15.82Mpa, has good later strength and endurance quality.
Embodiment 2:With brown coal germanium tailings be primary raw material steam-pressing brisk constituent and percentage by weight be: pretreatment brown coal germanium tailings 65wt%, flyash 10wt%, slaked lime 10wt%, water 14.795wt%, addition are the calcium sulfate of flyash weight 2.05wt%.
The preparation process of above-mentioned brown coal germanium tailings steam-pressing brisk is as follows:
(1) first brown coal germanium tailings is dried to moisture content less than 1wt%, then < 3mm, obtains pretreatment brown coal germanium tailings to be crushed to granularity; In pretreatment tailings, the particle diameter tailings < 20wt% less than 0.074mm;
(2) pretreatment brown coal germanium tailings 65g, flyash 10g, slaked lime 10g are poured into after being dry mixed 5min in blender, add 14.795g water and 0.205g additive calcium sulfate continues stirring 5min;
(3) being pressed into adobe after step (2) gained compound ageing 2h, briquetting pressure is 15Mpa;
(4) step (3) gained adobe being rested and put into steam-cured still after 6h, be 160 DEG C in steam press maintenance temperature, steam press maintenance pressure is 1.25Mpa, steam press maintenance 8h under autoclaved condition, Temperature fall, and being namely able to brown coal germanium tailings is the steam-pressing brisk of primary raw material.
Steam-pressing brisk good looking appearance prepared by the present embodiment, comprcssive strength is 16.52Mpa, has good later strength and endurance quality.
Embodiment 3: with brown coal germanium tailings be primary raw material steam-pressing brisk constituent and percentage by weight be: pretreatment brown coal germanium tailings 54.7wt%, flyash 20wt%, slaked lime 12wt%, water 13.058wt%, addition are the additive (calcium sulfate, sodium sulfate and calcium oxide 1:1:1 in mass ratio mixing prepare) of flyash weight 2.02wt%.
The preparation process of this brown coal germanium tailings steam-pressing brisk is:
(1) first brown coal germanium tailings is dried to moisture content less than 1wt%, then < 3mm, obtains pretreatment brown coal germanium tailings to be crushed to granularity; In pretreatment tailings, the particle diameter tailings < 20wt% less than 0.074mm;
(2) pretreatment brown coal germanium tailings 54.7g, flyash 20g, slaked lime 12g are poured into after being dry mixed 4.5min in blender, add 13.058g water and 0.242g additive (calcium sulfate, sodium sulfate and calcium oxide mixture) continues stirring 4min;
(3) being pressed into adobe after step (2) gained compound ageing 1.5h, briquetting pressure is 20Mpa;
(4) step (3) gained adobe being rested and put into steam-cured still after 6h, be 155 DEG C in steam press maintenance temperature, steam press maintenance pressure is 1.1Mpa, steam press maintenance 6h under autoclaved condition, Temperature fall, and being namely able to brown coal germanium tailings is the steam-pressing brisk of primary raw material;
Steam-pressing brisk good looking appearance prepared by the present embodiment, comprcssive strength is 17.36Mpa, has good later strength and endurance quality.
Embodiment 4: preparing with the steam-pressing brisk that brown coal germanium tailings is primary raw material by following raw material, each raw material and percentage by weight be: pretreatment brown coal germanium tailings 60wt%, flyash 15wt%, slaked lime 14wt%, water 10.72wt%, addition are the additive (sodium sulfate and calcium oxide 2:1 in mass ratio mixing prepares) of flyash weight 2wt%.
The preparation process of above-mentioned brown coal germanium tailings steam-pressing brisk is:
(1) first brown coal germanium tailings is dried to moisture content less than 1wt%, then < 3mm, obtains pretreatment brown coal germanium tailings to be crushed to granularity; In pretreatment tailings, particle diameter is less than 0.074mm < 20wt%;
(2) pretreatment brown coal germanium tailings 60g, flyash 15g, slaked lime 14g are poured into after being dry mixed 5min in blender, add 10.72g water and 0.28g additive (sodium sulfate and calcium oxide mixture) continues stirring 5min;
(3) being pressed into adobe after step (2) gained compound ageing 1h, briquetting pressure is 18Mpa;
(4) step (3) gained adobe being rested and put into steam-cured still after 6h, be 158 DEG C in steam press maintenance temperature, steam press maintenance pressure is 1.15Mpa, steam press maintenance 7h under autoclaved condition, Temperature fall, and being namely able to brown coal germanium tailings is the steam-pressing brisk of primary raw material.
Steam-pressing brisk good looking appearance prepared by the present embodiment, comprcssive strength is 18.54Mpa, has good later strength and endurance quality.
Claims (2)
1. the steam-pressing brisk that a kind is primary raw material with brown coal germanium tailings, it is characterised in that constituent and percentage by weight thereof be: pretreatment brown coal germanium tailings 50wt% ~ 65wt%, flyash 10wt% ~ 20wt%, slaked lime 10wt% ~ 15wt%, water 10wt% ~ 15wt%, addition are the additive of slaked lime weight 2.0wt% ~ 2.05wt%;
Described additive is the arbitrarily ratio mixture of one or more in sodium sulfate, calcium sulfate, calcium oxide;
Described pretreatment brown coal germanium tailings is first to dry to moisture content brown coal germanium tailings less than 1wt%, then < 3mm, obtains pretreatment brown coal germanium tailings to be crushed to granularity; In pretreatment brown coal germanium tailings, the particle diameter tailings < 20wt% less than 0.074mm.
2. the preparation method of the steam-pressing brisk being primary raw material with brown coal germanium tailings described in claim 1, it is characterised in that preparation process is as follows:
(1) pretreatment brown coal germanium tailings, flyash, slaked lime are poured into after being dry mixed 4min ~ 5min in blender, add water and additive continues stirring 3 ~ 5min;
(2) being pressed into adobe after step (1) gained compound ageing 1h ~ 2h, briquetting pressure is 10～20Mpa;
(3) step (2) gained adobe is rested and put into steam-cured still after 6h, being 150～160 DEG C in steam press maintenance temperature, steam press maintenance pressure is 1.05Mpa ~ 1.25Mpa, steam press maintenance 5h ~ 8h under autoclaved condition, Temperature fall, being namely able to brown coal germanium tailings is the steam-pressing brisk of primary raw material.
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| CN103288407A (en) * | 2013-05-24 | 2013-09-11 | 武汉理工大学 | Autoclaved brick prepared by utilizing stone coal vanadium extraction tailings as main raw material and preparation method thereof |
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| CN103288407A (en) * | 2013-05-24 | 2013-09-11 | 武汉理工大学 | Autoclaved brick prepared by utilizing stone coal vanadium extraction tailings as main raw material and preparation method thereof |
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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436期);149-152 * |
| 《粉煤灰在高硫石煤提钒尾渣蒸压砖制备中的应用》;史伟等;《硅酸盐通报》;20130630;第32卷(第6期);1161-1164、1170 * |
| 《褐煤综合利用提锗的研究与生产实践》;陈文鹏;《云南冶金》;19910228(第1期);38-44 * |
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