Gasified slag flotation collecting agent and preparation method thereof

A collector, gasification slag technology, applied in flotation, solid separation and other directions, can solve the problems of high degree of surface oxidation, low flotation efficiency, poor floatability, etc., to achieve the effect of strong adsorption effect

Active Publication Date: 2021-09-07
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the formation of gasification slag, the coal-fired reaction in the high-temperature gasification furnace caused great changes in the physical and chemical properties of the surface of unburned carbon particles in the gasification ash due to incomplete combustion, developed pores, and loss of organic aliphatic hydrocarbon structure , the degree of surface oxidation is high, the number of oxygen-containing functional groups increases, and its hydrophilicity increases significantly, resulting in poor floatability and low flotation efficiency of residual carbon particles in gasification ash compared with common coal
Using conventional diesel oil or kerosene as a collector will cause the collector and foaming agent to enter the voids of the gasification slag during the flotation process, and the utilization rate of the agent is low, which affects the flotation effect; on the other hand, these non-polar hydrocarbons The adsorption effect of oil-like on the surface of carbon residue particles containing hydrophilic functional groups is not good, resulting in poor surface modification of carbon residue particles

Method used

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  • Gasified slag flotation collecting agent and preparation method thereof
  • Gasified slag flotation collecting agent and preparation method thereof
  • Gasified slag flotation collecting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of gasification slag flotation collector, comprising the following steps:

[0029] S1. Add deionized water to sodium lauryl sulfate at a mass ratio of 1:1, heat to 50°C with a magnetic stirrer and stir for 10 minutes to prepare sodium lauryl sulfate solution;

[0030] S2. Add non-polar hydrocarbon oil into the sodium lauryl sulfate solution at a mass ratio of 1:9, heat to 70° C. with a magnetic stirrer and stir for 10 minutes to obtain a mixed solution;

[0031] S3, adding ultra-fine graphite particles into the S2 mixed solution at a mass ratio of 120:1, using an ultrasonic oscillator to oscillate and mix for 3 minutes to obtain a graphite mixed solution; the diameter of the ultra-fine graphite particles is 1-2 μm;

[0032] S4. Add an emulsifier to the graphite mixed solution obtained in S3 at a mass ratio of 20:1, heat to 70° C. with a magnetic stirrer and stir for 1 min to obtain a gasification slag flotation collector.

[0033] Above-mentioned e...

Embodiment 2

[0035] Carry out gasification slag flotation test using a kind of gasification slag flotation collector provided by the invention

[0036] 1. prepare collector, process is as follows:

[0037] S1. Add 1 g of sodium lauryl sulfate to 1 g of deionized water, heat sodium lauryl sulfate and deionized water to 50°C with a magnetic stirrer and stir for 10 minutes at the same time to obtain a sodium lauryl sulfate solution;

[0038] S2. Add 18 g of diesel oil to the product of S1, and heat it to 70°C with a magnetic stirrer while stirring for 10 min to obtain a mixed solution;

[0039] S3, adding 0.17g ultrafine graphite to the S2 product, using an ultrasonic oscillator to vibrate and mix for 3 minutes to obtain a graphite mixed solution;

[0040] S4. Add 1 g of polyethylene glycol to the product of S3, heat to 70° C. with a magnetic stirrer and stir for 1 min to obtain a gasification slag flotation collector.

[0041] 2. Test group flotation

[0042] Grind the gasification slag f...

Embodiment 3

[0051] Adopt the same material and method as embodiment 2, adjust the diesel oil in the collector to be kerosene, record the flotation contrast test result as shown in table 2 below:

[0052] Table 2 flotation comparison test results

[0053]

[0054] Data comparison shows that using kerosene to prepare collectors, compared with directly using kerosene, the concentrate flotation yield has a greater degree of increase, an increase of 11.40%, showing that the collector prepared by the present invention has a better effect.

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Abstract

The invention relates to the technical field of gasified slag flotation, in particular to a gasified slag flotation collecting agent and a preparation method thereof. The collecting agent comprises 1-3 parts by weight of lauryl sodium sulfate, 1-5 parts by weight of deionized water, 15-60 parts by weight of non-polar hydrocarbon oil, 1 / 10-1 / 2 parts by weight of hydrophobic particles and 1-3 parts by weight of an emulsifier, and the hydrophobic particles are graphite particles with the diameter of 1-2 microns. According to the prepared gasified slag collecting agent, lauryl sodium sulfate and non-polar hydrocarbon oil are mixed and compounded, the adsorption effect of the agent on the residual carbon surface of gasified slag can be improved, meanwhile, hydrophobic particles are added to enter pores in the surface of the gasified slag for filling in the flotation process, the agent is prevented from entering the pores, the utilization rate of the agent is increased, the flotation cost is reduced, and the flotation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of gasification slag flotation, in particular to a gasification slag flotation collector and a preparation method thereof. Background technique [0002] In the field of clean coal technology, coal gasification technology plays an important role. However, a large amount of ash will be produced during the coal gasification process. The amount of gasification ash in my country reaches tens of millions of tons each year, a large part of which is accumulated in the ash storage yard, occupying a large area of ​​land, and the gasification ash The slag contains a variety of complex metal elements, which cause great pollution to the environment. [0003] Because there are a large amount of mineral melts in the coal gasification slag, the carbon and ash are seriously wrapped and included, and the embedded particle size is fine, flotation is the main method to realize the separation of carbon and ash. During the forma...

Claims

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Application Information

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IPC IPC(8): B03D1/018
CPCB03D1/018
Inventor 张海军王海楠李文峰田全志闫小康梁艳男杨文清
Owner CHINA UNIV OF MINING & TECH
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