Directional development method for low-quality coal flotation collecting agent

A low-quality coal and collector technology, applied in flotation, solid separation, solid waste removal, etc., can solve natural pollution and other problems

Active Publication Date: 2021-09-24
CHINA UNIV OF MINING & TECH
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  • Summary
  • 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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  • Directional development method for low-quality coal flotation collecting agent

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Experimental program
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Effect test

Embodiment 1

[0040] Collect polyethylene terephthalate (PET) as the raw material, wash and dry it and crush it to below 40 mesh as the pyrolysis raw material, select HZSM-5 and NiO as the catalyst, calibrate and adjust the PET unit in the falling bed reactor Falling mass within a certain time, select 500°C as the reaction temperature, select N 2 For protective gas. The solid semi-coke components produced after the pyrolysis reaction are collected and used as industrial raw materials. When the light components escape from the reactor and enter the pipeline, the pipeline needs to be reheated to 400°C to prevent small molecules from repolymerizing and blocking the pipeline. The light component realizes the separation of oil and gas through condensation, and the gas is used as a chemical raw material after separation and purification, and dichloromethane is used as a solvent to mix with oil and then purified by rotary evaporation. Component analysis of the purified oil shows that the contents...

Embodiment 2

[0042] Collect polyethylene (PE) and biomass straw as raw materials, the blending mass ratio is 2:1, after cleaning and drying, they are crushed to less than 20mm as pyrolysis raw materials, and SiO with better effect is selected 2 -Al 2 o 3 As a catalyst, calibrate and adjust the falling weight of PET per unit time in a stirred reactor, select 440°C as the reaction temperature, and select N 2 For protective gas. The solid semi-coke components produced after the pyrolysis reaction are collected and used as industrial raw materials. When the light components escape from the reactor and enter the pipeline, the pipeline needs to be reheated to 380°C to prevent small molecules from repolymerizing and blocking 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, and carbon tetrachloride (CCl 4 ) is the oil mixed with solvent and oil and purified by rotary e...

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Abstract

The invention discloses a directional development method for a low-quality coal flotation collecting agent, and is suitable for collecting agent research. The method comprises the following steps: by taking waste plastics as a raw material, performing directional pyrolysis in a pyrolysis device after pretreatment, purifying and collecting tar in light components generated by pyrolysis, analyzing the composition of the components, and selecting the types of medicaments needing to be continuously compounded for the first time; after surface structure and functional group distribution characteristic analysis of raw coal, subjecting the pyrolytic tar and all agents needing to be compounded to directional screening, and testing the adsorption characteristic of each agent molecule on the coal surface through a single molecule force spectrum testing technology, and optimizing the agent compounding scheme according to the adsorption characteristic effect and then determining the optimal low-rank coal collecting agent preparation scheme through flotation comparison. The method is simple in step, and directional screening and design of collecting agent molecules are achieved; according to the method, the efficient collecting agent for different low-rank coal molecules can be scientifically prepared. By means of the process, directional screening and design of collecting agent molecules under the microscopic and mesoscale are achieved in the field of low-quality coal flotation reagent development.

Description

technical field [0001] The invention relates to a directional development method of a flotation collector, and is especially suitable for the research of a collector, which is a directional development method of a low-quality coal flotation collector. Background technique [0002] Low-quality coal accounts for more than 40% of my country's coal resource reserves, and the annual consumption is nearly 2 billion tons. The flotation and upgrading of low-quality coal is the difficulty and focus of the clean utilization of low-quality coal in my country. Among them, difficult-to-float coal is collected by efficient flotation Drug development is 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 Synergistic effect, improve flotation efficiency. [0003] The devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B09B3/00B09B5/00B03D101/02B03D103/08
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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