WO2021008324A1 - Liquid-solid composite collector for coal slime flotation and preparation method therefor - Google Patents

Liquid-solid composite collector for coal slime flotation and preparation method therefor Download PDF

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WO2021008324A1
WO2021008324A1 PCT/CN2020/098373 CN2020098373W WO2021008324A1 WO 2021008324 A1 WO2021008324 A1 WO 2021008324A1 CN 2020098373 W CN2020098373 W CN 2020098373W WO 2021008324 A1 WO2021008324 A1 WO 2021008324A1
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coal
liquid
solid composite
collector
flotation
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PCT/CN2020/098373
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French (fr)
Chinese (zh)
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王海锋
杨丹
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中国矿业大学
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/001Flotation agents
    • B03D1/004Organic compounds
    • B03D1/006Hydrocarbons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/02Froth-flotation processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/14Flotation machines
    • B03D1/16Flotation machines with impellers; Subaeration machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00Specified effects produced by the flotation agents
    • B03D2201/02Collectors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00Specified materials treated by the flotation agents; specified applications
    • B03D2203/02Ores
    • B03D2203/04Non-sulfide ores
    • B03D2203/08Coal ores, fly ash or soot

Definitions

  • the invention belongs to the technical field of flotation reagents, and particularly relates to a liquid-solid composite collector for slime flotation and a preparation method thereof.
  • coal occupies an important position. From the current situation, the development of the national economy and the progress of industry are inseparable from basic energy. Coal has made a major contribution to China’s ecological construction. However, in the processing and use of coal, most of the coal resources are underutilized, low conversion efficiency, and serious waste of resources. In order to solve these problems, coal is currently being further improved. Processing, improve the utilization efficiency of coal, and produce high-quality coal resources; ultra-pure coal is a new type of high-value-added coal resource, which can prepare activated carbon, oil-water coal slurry and other products, and has certain market development prospects.
  • Coal slime separation generally adopts methods such as gravity separation and flotation.
  • flotation is also often used in actual operation procedures.
  • hydrocarbon oil is used for flotation of coal slime, which enhances the hydrophobicity of the surface of coal particles to improve the flotation effect.
  • the ultra-fine coal particles with strong flotation properties can be adsorbed on the surface of the coal particles to be floated during the flotation process, which improves the hydrophobicity of the surface of the coal particles to be floated, thereby improving the adhesion efficiency between the coal particles and the bubbles , Effectively improve the flotation effect of slime.
  • the composite collector has low cost and good effect, can better improve the efficiency of slime flotation and increase the recovery rate of clean coal products.
  • the coal is ground to ultra-fine particles by grinding, and ultra-fine coal particles are added to kerosene or chemical derivatives to form a liquid-solid composite collector, which can significantly improve the flotation efficiency and has a certain effect on slime flotation.
  • the present invention provides a liquid-solid composite collector for slime flotation and a preparation method thereof. Based on slime flotation technology, the method improves the flotation efficiency and improves the slime Recycling rate reduces resource waste.
  • a liquid-solid composite collector for coal slime flotation is characterized in that the liquid-solid composite collector is composed of a mixture of ultrafine coal-based particles and a liquid collector.
  • the liquid-solid composite collector includes 95%-99.5% of liquid collector and 0.5%-5% of ultra-fine coal particles according to mass percentage.
  • the liquid collector is kerosene, diesel, fuel oil, natural gas condensate or n-dodecane used in the flotation of coal slime.
  • the ultrafine coal-based particles have strong floatability.
  • the ultra-fine coal-based particles are ultra-pure coal, low-ash clean coal particles, carbon powder, or low-ash carbon components extracted from clean coal.
  • the size of the ultrafine coal-based particles is less than 1 micron.
  • a method for preparing a liquid-solid composite collector for coal slime flotation The superfine coal-based particles after milling are added to the liquid collector and mixed uniformly to obtain a liquid-solid composite collector. Receipt.
  • the present invention has the following beneficial effects:
  • liquid-solid composite collector of the present invention ultrafine coal particles with low ash content are added to kerosene, diesel oil or chemical by-products to optimize the collector.
  • the effect of the liquid-solid composite collector is obviously better than The effect of using kerosene, diesel or chemical by-products alone; under the same conditions, the foam-enriched minerals of the liquid-solid composite collector are much higher than the foam-enriched minerals of the alkane agent alone.
  • the ultrafine coal particles with strong floatability in the liquid-solid composite collector of the present invention can be adsorbed on the surface of the coal particles to be floated during the flotation process, which improves the hydrophobicity of the surface of the coal particles to be floated, thereby enabling Improve the adhesion efficiency between coal particles and bubbles, and effectively improve the flotation effect of slime.
  • the liquid-solid composite collector has low cost and good effect, can better improve the efficiency of slime flotation and increase the recovery rate of clean coal products.
  • Figure 1 is the test results of two different collectors in the present invention.
  • Liquid-solid composite collector take 98% n-dodecane and 2% ultra-pure coal ultrafine particles (particle size less than 1 micron) according to mass percentage, add ultra-fine coal particles into n-dodecane, ultrafine The mixture of coal particles and conventional collectors is uniformly mixed, and then a liquid-solid composite collector is obtained.
  • the obtained liquid-solid composite collector was used in Examples B1-B4.
  • the liquid-solid composite collector includes 95% kerosene and 5% low-ash clean coal particles (grain size less than 1 micron) according to mass percentage.
  • the liquid-solid composite collector includes 99.5% diesel oil and 0.5% of the low ash component (particle size less than 1 micron) extracted from clean coal according to mass percentage.
  • the liquid-solid composite collector includes 99% fuel oil and 1% low ash component (particle size less than 1 micron) extracted from clean coal according to mass percentage.
  • the liquid-solid composite collector includes 98.5% of natural gas condensate oil and 1.5% of low ash content (particle size less than 1 micron) extracted from clean coal in terms of mass percentage.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector.
  • the dosage is 100g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane.
  • the dosage is 100g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector.
  • the dosage is 150g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane.
  • the dosage is 150g/t
  • the mixing time is 2min
  • the foaming agent secondary octanol is added
  • the dosage is 80g/t
  • the mixing time is 30s.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector.
  • the dosage is 200g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane.
  • the dosage is 200g/t
  • the mixing time is 2min
  • the foaming agent secondary octanol is added
  • the dosage is 80g/t
  • the mixing time is 30s.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector.
  • the dosage is 250g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
  • the slime flotation test uses a 0.5L self-priming small flotation machine.
  • the impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L.
  • the slurry refers to the formation of bituminous coal by adding water Liquid mixture form.
  • First turn on the flotation machine weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane.
  • the dosage is 250g/t
  • the mixing time is 2min
  • the foaming agent secondary octanol is added
  • the dosage 80g/t
  • the mixing time is 30s.
  • the foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tail coal product respectively, dry and weigh the two, then take about 1g of coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, calculate The yield and ash content of the clean coal product.
  • the flotation effects of the liquid-solid composite collector provided by the present invention and the collector in the prior art are used in Examples B1-B4 and Comparative Examples B1-B4, respectively.
  • the yields of clean coal products obtained by using the liquid-solid composite collector provided by the present invention in Examples B1-B4 were 42.23%, 45.31%, 51.12%, and 54.33%, respectively.
  • Comparative Examples B1-B4 used the prior art.
  • the yields of the clean coal products obtained by the collector are 36.34%, 40.32%, 42.23%, 43.34%, respectively.
  • Examples B1-B4 are greater than those of Comparative Examples B1-B4; Examples B1-B4 adopt The ash content of the clean coal product obtained by the liquid-solid composite collector provided by the present invention is 8.57%, 9.21%, 10.43%, and 10.89%, respectively.
  • the comparative examples B1-B4 use the clean coal obtained by the collector in the prior art
  • the ash content of the product is 11.21%, 12.34%, 13.01%, and 13.53%, respectively.
  • the ash content of Examples B1-B4 is less than that of Comparative Examples B1-B4.

Abstract

Disclosed are a liquid-solid composite collector for coal slime flotation and a preparation method therefor. The liquid-solid composite collector is formed by mixing ultra-fine coal-based particles having a high floatability and a liquid collector in proportion. The liquid-solid composite collector comprises, by mass percentage, 0.5-5% of the ultra-fine coal-based particles and 90-99.5% of the liquid collector. The ultra-fine coal-based particles having high floatability in the liquid-solid composite collector can be adsorbed onto the surface of coal particles to be floated during flotation, improving the hydrophobicity of the surface of the coal particles to be floated, thereby improving the adhesion efficiency between coal particles and gas bubbles and effectively improving the flotation effect of coal slime. The liquid-solid composite collector has a low cost and a good effect, and can more effectively improve the efficiency of coal slime flotation and improve the recovery rate of clean coal products.

Description

一种煤泥浮选的液固复合捕收剂及其制备方法Liquid-solid composite collector for coal slime flotation and preparation method thereof 技术领域Technical field
本发明属于浮选药剂技术领域,特别涉及一种煤泥浮选的液固复合捕收剂及其制备方法。The invention belongs to the technical field of flotation reagents, and particularly relates to a liquid-solid composite collector for slime flotation and a preparation method thereof.
背景技术Background technique
煤炭作为我国基本能源,占据重要地位,就目前情况来看,国民经济发展以及工业的进步都离不开基础能源。煤炭为中国的社会主义建设做出了重大贡献,但是在煤炭的加工使用中,大部分煤炭资源存在利用不充分,转化效率低,资源浪费严重的现象,为了解决这些问题,目前对煤炭进行进一步加工处理,提高煤炭的利用效率,制作出高品质煤炭资源;超纯煤属于新型高附加值的煤炭资源,它能够制备活性炭、油水煤浆等产品,有一定的市场开发前景。As my country's basic energy, coal occupies an important position. From the current situation, the development of the national economy and the progress of industry are inseparable from basic energy. Coal has made a major contribution to China’s socialist construction. However, in the processing and use of coal, most of the coal resources are underutilized, low conversion efficiency, and serious waste of resources. In order to solve these problems, coal is currently being further improved. Processing, improve the utilization efficiency of coal, and produce high-quality coal resources; ultra-pure coal is a new type of high-value-added coal resource, which can prepare activated carbon, oil-water coal slurry and other products, and has certain market development prospects.
煤泥分选一般采用重选、浮选等手段,而浮选作为分选煤泥的有效方法之一,在实际操作流程中也经常被使用。一般对煤泥的浮选采用的是烃类油进行浮选,通过强化煤颗粒表面的疏水性,提高浮选效果。可浮选性强的超细煤颗粒在浮选过程中能够吸附在被浮选煤颗粒的表面,提高了被浮选煤颗粒表面的疏水性,从而能够提高煤粒和气泡之间的黏附效率,有效改善煤泥浮选效果。该复合捕收剂成本低、效果好,能较好改善煤泥浮选效率,提高精煤产品回收率。通过研磨的方式将煤碾磨至超细颗粒,向煤油或者化工衍生物里面加入超细煤颗粒,形成一种液固复合捕收剂,能够明显提高浮选效率,对煤泥浮选具有一定的借鉴。Coal slime separation generally adopts methods such as gravity separation and flotation. As one of the effective methods for separating slime, flotation is also often used in actual operation procedures. Generally, hydrocarbon oil is used for flotation of coal slime, which enhances the hydrophobicity of the surface of coal particles to improve the flotation effect. The ultra-fine coal particles with strong flotation properties can be adsorbed on the surface of the coal particles to be floated during the flotation process, which improves the hydrophobicity of the surface of the coal particles to be floated, thereby improving the adhesion efficiency between the coal particles and the bubbles , Effectively improve the flotation effect of slime. The composite collector has low cost and good effect, can better improve the efficiency of slime flotation and increase the recovery rate of clean coal products. The coal is ground to ultra-fine particles by grinding, and ultra-fine coal particles are added to kerosene or chemical derivatives to form a liquid-solid composite collector, which can significantly improve the flotation efficiency and has a certain effect on slime flotation. For reference.
发明内容Summary of the invention
为了解决现有技术中的问题,本发明提供了一种煤泥浮选的液固复合捕收剂及其制备方法,基于煤泥的浮选技术,该方法提高浮选效率,提高煤泥的回收率,减少资源浪费。In order to solve the problems in the prior art, the present invention provides a liquid-solid composite collector for slime flotation and a preparation method thereof. Based on slime flotation technology, the method improves the flotation efficiency and improves the slime Recycling rate reduces resource waste.
为实现上述目的,本发明采用的技术方案为:In order to achieve the above objectives, the technical solutions adopted by the present invention are:
一种煤泥浮选的液固复合捕收剂,其特征在于,液固复合捕收剂由超细煤基颗粒和液态捕收剂混合构成。A liquid-solid composite collector for coal slime flotation is characterized in that the liquid-solid composite collector is composed of a mixture of ultrafine coal-based particles and a liquid collector.
优选地,所述液固复合捕收剂按照质量百分比包括:液态捕收剂95%-99.5%,超细精煤颗粒0.5%-5%。Preferably, the liquid-solid composite collector includes 95%-99.5% of liquid collector and 0.5%-5% of ultra-fine coal particles according to mass percentage.
优选地,所述液态捕收剂为煤泥浮选使用的煤油、柴油、燃料油、天然气冷凝油或 正十二烷。Preferably, the liquid collector is kerosene, diesel, fuel oil, natural gas condensate or n-dodecane used in the flotation of coal slime.
优选地,所述超细煤基颗粒的可浮性强。Preferably, the ultrafine coal-based particles have strong floatability.
优选地,所述超细煤基颗粒为超纯煤、低灰分精煤颗粒、碳粉或由精煤提取的低灰分碳组分。Preferably, the ultra-fine coal-based particles are ultra-pure coal, low-ash clean coal particles, carbon powder, or low-ash carbon components extracted from clean coal.
优选地,所述超细煤基颗粒的粒级小于1微米。Preferably, the size of the ultrafine coal-based particles is less than 1 micron.
一种煤泥浮选的液固复合捕收剂的制备方法,将碾磨后的超细煤基颗粒,向液体捕收剂里加入超细煤基颗粒,并混合均匀,得到液固复合捕收剂。A method for preparing a liquid-solid composite collector for coal slime flotation. The superfine coal-based particles after milling are added to the liquid collector and mixed uniformly to obtain a liquid-solid composite collector. Receipt.
与现有技术相比,本发明具有以下有益效果:Compared with the prior art, the present invention has the following beneficial effects:
本发明中的液固复合捕收剂,将灰分低的超细精煤颗粒加入到煤油、柴油或者化工副产品中,起到了优化捕收剂的目的,液固复合捕收剂的效果明显优于单独使用煤油、柴油或者化工副产品的效果;在相同条件下,使用液固复合捕收剂的泡沫富集的矿物远高于单独使用烷烃药剂上泡沫富集的矿物。本发明的液固复合捕收剂中的可浮性强的超细煤颗粒在浮选过程中能够吸附在被浮选煤颗粒的表面,提高了被浮选煤颗粒表面的疏水性,从而能够提高煤粒和气泡之间的黏附效率,有效改善煤泥浮选效果。液固复合捕收剂成本低、效果好,能较好改善煤泥浮选效率,提高精煤产品回收率。In the liquid-solid composite collector of the present invention, ultrafine coal particles with low ash content are added to kerosene, diesel oil or chemical by-products to optimize the collector. The effect of the liquid-solid composite collector is obviously better than The effect of using kerosene, diesel or chemical by-products alone; under the same conditions, the foam-enriched minerals of the liquid-solid composite collector are much higher than the foam-enriched minerals of the alkane agent alone. The ultrafine coal particles with strong floatability in the liquid-solid composite collector of the present invention can be adsorbed on the surface of the coal particles to be floated during the flotation process, which improves the hydrophobicity of the surface of the coal particles to be floated, thereby enabling Improve the adhesion efficiency between coal particles and bubbles, and effectively improve the flotation effect of slime. The liquid-solid composite collector has low cost and good effect, can better improve the efficiency of slime flotation and increase the recovery rate of clean coal products.
附图说明Description of the drawings
图1是本发明中两种不同捕收剂试验结果。Figure 1 is the test results of two different collectors in the present invention.
具体实施方式Detailed ways
下面结合实施例对本发明作更进一步的说明。In the following, the present invention will be further explained in conjunction with the embodiments.
实施例A1Example A1
液固复合捕收剂,按照质量百分比取98%的正十二烷和2%超纯煤的超细颗粒(粒级小于1微米),将超细煤颗粒加入正十二烷中,超细煤颗粒和常规捕收剂的混合物混合均匀,之后得到液固复合捕收剂。Liquid-solid composite collector, take 98% n-dodecane and 2% ultra-pure coal ultrafine particles (particle size less than 1 micron) according to mass percentage, add ultra-fine coal particles into n-dodecane, ultrafine The mixture of coal particles and conventional collectors is uniformly mixed, and then a liquid-solid composite collector is obtained.
将得到的液固复合捕收剂应用在实施例B1-B4中。The obtained liquid-solid composite collector was used in Examples B1-B4.
实施例A2Example A2
液固复合捕收剂,按照质量百分比包括:煤油95%,低灰分精煤颗粒(粒级小于1微米)5%。The liquid-solid composite collector includes 95% kerosene and 5% low-ash clean coal particles (grain size less than 1 micron) according to mass percentage.
实施例A3Example A3
液固复合捕收剂,按照质量百分比包括:柴油99.5%,由精煤提取的低灰分组分(粒级小于1微米)0.5%。The liquid-solid composite collector includes 99.5% diesel oil and 0.5% of the low ash component (particle size less than 1 micron) extracted from clean coal according to mass percentage.
实施例A4Example A4
液固复合捕收剂,按照质量百分比包括:燃料油99%,由精煤提取的低灰分组分(粒级小于1微米)1%。The liquid-solid composite collector includes 99% fuel oil and 1% low ash component (particle size less than 1 micron) extracted from clean coal according to mass percentage.
实施例A5Example A5
液固复合捕收剂,按照质量百分比包括:天然气冷凝油98.5%,由精煤提取的低灰分组分(粒级小于1微米)1.5%。The liquid-solid composite collector includes 98.5% of natural gas condensate oil and 1.5% of low ash content (particle size less than 1 micron) extracted from clean coal in terms of mass percentage.
实施例B1Example B1
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加上述液固复合捕收剂,用量在100g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector. The dosage is 100g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
对比例B1Comparative Example B1
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加捕收剂正十二烷,用量在100g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane. The dosage is 100g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
实施例B2Example B2
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物 形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加上述液固复合捕收剂,用量在150g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector. The dosage is 150g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
对比例B2Comparative Example B2
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加捕收剂正十二烷,用量在150g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane. The dosage is 150g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
实施例B3Example B3
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加上述液固复合捕收剂,用量在200g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector. The dosage is 200g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
对比例B3Comparative Example B3
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加捕收剂正十二烷,用量在200g/t,调浆时间为 2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane. The dosage is 200g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
实施例B4Example B4
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加上述液固复合捕收剂,用量在250g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g of bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the above-mentioned liquid-solid composite collector. The dosage is 250g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tailing coal product respectively, dry and weigh the two, and then take a 1g coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, and calculate the refined coal product. The yield and ash content of coal products.
对比例B4Comparative Example B4
采用一段浮选流程,煤泥浮选试验选用的是0.5L的自吸式小浮选机上,叶轮转速控制在1700r/min,矿浆浓度大约在70g/L,矿浆是指烟煤的原料加入水形成液态混合物形式。首先将浮选机打开,用电子称称取35g的烟煤,放入浮选槽内,再加0.5L的水加入浮选槽,调浆时间为2min,然后加捕收剂正十二烷,用量在250g/t,调浆时间为2min,再加起泡剂仲辛醇,用量在80g/t,调浆时间在30s。然后打开充气阀门,开始刮泡,刮泡时间在2min,泡沫富集的是精煤产品,未浮上来的产品是尾煤产品,主要包括矸石等。再分别过滤出精煤产品和尾煤产品,将两者烘干称重,然后在烘干称重后的精煤产品里面取1g左右的煤样放入马弗炉里烧慢灰,计算出精煤产物的产率和灰分。A section of flotation process is adopted. The slime flotation test uses a 0.5L self-priming small flotation machine. The impeller speed is controlled at 1700r/min, and the slurry concentration is about 70g/L. The slurry refers to the formation of bituminous coal by adding water Liquid mixture form. First turn on the flotation machine, weigh 35g bituminous coal with an electronic scale, put it into the flotation tank, add 0.5L of water to the flotation tank, adjust the slurry time for 2min, and then add the collector n-dodecane. The dosage is 250g/t, the mixing time is 2min, and the foaming agent secondary octanol is added, the dosage is 80g/t, and the mixing time is 30s. Then open the aeration valve and start to scrape bubbles. The scraping time is 2 minutes. The foam is enriched by clean coal products, and the products that have not floated are tailings, mainly including gangue. Then filter out the clean coal product and the tail coal product respectively, dry and weigh the two, then take about 1g of coal sample from the dried and weighed clean coal product and put it into the muffle furnace to burn the slow ash, calculate The yield and ash content of the clean coal product.
表1 实施例B1-B4和对比例B1-B4的产率及灰分结果Table 1 Yield and ash results of Examples B1-B4 and Comparative Examples B1-B4
Figure PCTCN2020098373-appb-000001
Figure PCTCN2020098373-appb-000001
如表1和图1所示,实施例B1-B4和对比例B1-B4中分别采用了本发明提供的液固复合捕收剂和现有技术中捕收剂的浮选效果。实施例B1-B4采用了本发明提供的液固复合捕收剂得到的精煤产物的产率分别为42.23%,45.31%,51.12%,54.33%,对比例B1-B4采用了现有技术中捕收剂得到的精煤产物的产率分别为36.34%,40.32%,42.23%,43.34%,实施例B1-B4的产率均大于对比例B1-B4的产率;实施例B1-B4采用了本发明提供的液固复合捕收剂得到的精煤产物的灰分分别为8.57%,9.21%,10.43%,10.89%,对比例B1-B4采用了现有技术中捕收剂得到的精煤产物的灰分分别为11.21%,12.34%,13.01%,13.53%,实施例B1-B4的灰分均小于对比例B1-B4的灰分。As shown in Table 1 and Figure 1, the flotation effects of the liquid-solid composite collector provided by the present invention and the collector in the prior art are used in Examples B1-B4 and Comparative Examples B1-B4, respectively. The yields of clean coal products obtained by using the liquid-solid composite collector provided by the present invention in Examples B1-B4 were 42.23%, 45.31%, 51.12%, and 54.33%, respectively. Comparative Examples B1-B4 used the prior art. The yields of the clean coal products obtained by the collector are 36.34%, 40.32%, 42.23%, 43.34%, respectively. The yields of Examples B1-B4 are greater than those of Comparative Examples B1-B4; Examples B1-B4 adopt The ash content of the clean coal product obtained by the liquid-solid composite collector provided by the present invention is 8.57%, 9.21%, 10.43%, and 10.89%, respectively. The comparative examples B1-B4 use the clean coal obtained by the collector in the prior art The ash content of the product is 11.21%, 12.34%, 13.01%, and 13.53%, respectively. The ash content of Examples B1-B4 is less than that of Comparative Examples B1-B4.
以上所述仅是本发明的优选实施方式,应当指出:对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims (6)

  1. 一种煤泥浮选的液固复合捕收剂,其特征在于,液固复合捕收剂由超细煤基颗粒和液态捕收剂混合构成。A liquid-solid composite collector for coal slime flotation is characterized in that the liquid-solid composite collector is composed of a mixture of ultrafine coal-based particles and a liquid collector.
  2. 根据权利要求1中煤泥浮选的液固复合捕收剂,其特征在于,所述液固复合捕收剂按照质量百分比包括:液态捕收剂95%-99.5%,超细精煤颗粒0.5%-5%。The liquid-solid composite collector for slime flotation according to claim 1, characterized in that, the liquid-solid composite collector comprises, in terms of mass percentage: 95%-99.5% of liquid collector and 0.5% of ultrafine coal particles. %-5%.
  3. 根据权利要求1中煤泥浮选的液固复合捕收剂,其特征在于,所述液态捕收剂为煤泥浮选使用的煤油、柴油、燃料油、天然气冷凝油或者正十二烷。The liquid-solid composite collector for coal slime flotation according to claim 1, characterized in that the liquid collector is kerosene, diesel, fuel oil, natural gas condensate or n-dodecane used in coal slime flotation.
  4. 根据权利要求1中煤泥浮选的液固复合捕收剂,其特征在于,所述超细煤基颗粒为超纯煤、低灰分精煤颗粒、碳粉或由精煤提取的低灰分碳组分。The liquid-solid composite collector for slime flotation according to claim 1, wherein the ultra-fine coal-based particles are ultra-pure coal, low-ash clean coal particles, carbon powder or low-ash carbon extracted from clean coal Components.
  5. 根据权利要求1中煤泥浮选的液固复合捕收剂,其特征在于,所述超细煤基颗粒的粒级小于1微米。The liquid-solid composite collector for slime flotation according to claim 1, wherein the size of the ultrafine coal-based particles is less than 1 micron.
  6. 根据权利要求1-5任一所述的煤泥浮选的液固复合捕收剂的制备方法,其特征在于,将碾磨后的超细煤基颗粒,向液体捕收剂里加入超细煤基颗粒,并混合均匀,得到液固复合捕收剂。The method for preparing a liquid-solid composite collector for coal slime flotation according to any one of claims 1 to 5, wherein the ultrafine coal-based particles after grinding are added to the liquid collector. Coal-based particles are mixed uniformly to obtain a liquid-solid composite collector.
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