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A method for directional development of low-quality coal flotation collectors

A low-quality coal, collector technology, applied in flotation, chemical instruments and methods, transportation and packaging, etc., can solve problems such as natural pollution

Active Publication Date: 2022-07-29
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also caused serious pollution to nature

Method used

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  • A method for directional development of low-quality coal flotation collectors

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Experimental program
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Effect test

Embodiment 1

[0040] Collect polyethylene terephthalate (PET) as raw material, wash and dry it and crush it to below 40 mesh as raw material for pyrolysis, select HZSM-5 and NiO as catalysts, calibrate and adjust PET units in a falling bed reactor The falling mass in time, choose 500 ℃ as the reaction temperature, choose N 2 for protective gas. The solid semi-coke components generated after the pyrolysis reaction are collected and used as industrial raw materials. When the light components escape from the reactor and pass into the pipeline, the pipeline needs to be heated to 400 °C for a second time to prevent the repolymerization of small molecules from clogging the pipeline. The light component realizes the separation of oil and gas through condensation, and the gas is used for chemical raw materials after separation and purification. Dichloromethane is used as a solvent to be mixed with oil and purified by rotary evaporation. Component analysis of the purified oil shows that the polar c...

Embodiment 2

[0042] Polyethylene (PE) and biomass straw are collected as raw materials, and the mixing mass ratio is 2:1. After cleaning and drying, they are crushed to less than 20mm as raw materials for pyrolysis, and SiO with better effect is selected. 2 -Al 2 O 3 As the catalyst, calibrate and adjust the falling mass of PET per unit time in the stirring reactor, select 440 °C as the reaction temperature, and select N 2 for protective gas. The solid semi-coke components generated after the pyrolysis reaction are collected and used as industrial raw materials. When the light components escape from the reactor and pass into the pipeline, the pipeline needs to be heated to 380°C for a second time to prevent the repolymerization of small molecules from clogging the pipeline. The light components realize the separation of oil and gas through condensation, and the gas is used for chemical raw materials after separation and purification, with carbon tetrachloride (CCl 4 ) is the oil in whic...

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Abstract

A low-quality coal flotation collector directional development method, suitable for collector research. Using waste plastics as raw materials, after pretreatment, directional pyrolysis is carried out in a pyrolysis device, and the tar in the light components produced by pyrolysis is purified and collected, and the composition of the components is analyzed. After analyzing the surface structure and functional group distribution characteristics of the raw coal, the pyrolysis tar and all the chemicals that need to be compounded are directionally screened, and the adsorption characteristics of each agent molecule on the coal surface are tested by the single-molecule force spectrometry technology. The optimal pharmaceutical compounding scheme was determined, and then the optimal preparation scheme of low-rank coal collector was determined by flotation comparison. The steps are simple, realize the directional screening and design of collector molecules, and help to scientifically prepare high-efficiency collectors for different low-rank coal molecules. Targeted screening and design of collector molecules.

Description

technical field [0001] The invention relates to a method for directional development of a flotation collector, which is especially suitable for the directional development of a low-quality coal flotation collector. Background technique [0002] Low-quality coal accounts for more than 40% of my country's coal reserves, with an annual consumption of nearly 2 billion tons. The flotation and quality improvement of low-quality coal is the difficulty and focus of clean utilization of low-quality coal in my country. Agent development is the key. The combination of polar agents or ionic surfactants and non-polar agents can greatly reduce the consumption of flotation collectors, and the adsorption of polar groups and non-polar groups on the hydrophilic and hydrophobic sites on the surface of coal particles has a great effect. Synergy to improve flotation efficiency. [0003] The development of the plastics industry has made plastics widely used and brought a lot of convenience to pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B09B3/70B09B3/40B09B3/35B09B5/00B03D101/02B03D103/08B09B101/75
CPCB03D1/018B09B3/00B09B5/00B03D2201/02B03D2203/08
Inventor 桂夏辉张鹏德盛华麟方小霞王云琳康雪妍肖安妮夏阳超高向东高改兰
Owner CHINA UNIV OF MINING & TECH
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