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A method for preparing low-order coal slime heteropolar collector by modification of hydrocarbon oil
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A technology of hydrocarbon oil and collector, applied in solid separation, flotation and other directions, can solve the problems of weak recovery capacity, high price, complex preparation process, etc., achieve low cost, reduce flotation cost, and simple modification process Effect
Active Publication Date: 2019-05-07
CHINA UNIV OF MINING & TECH
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Problems solved by technology
However, the preparation process of compound medicaments is complicated, the types of medicaments are complex, and simple compounding is the main method. At the same time, the price of the medicaments used is relatively high, so it is necessary to further explore efficient preparation methods
Therefore, in view of the outstanding problem of weak recovery ability of conventional collectors in low-rank coal slime flotation, it is very important to develop high-efficiency and low-cost heteropolar reagents for realizing high-quality utilization of low-rank coal slime
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Embodiment 1
[0049] Example 1: A method for preparing a low-order coal slime heteropolar collector by modifying hydrocarbon oil. The raw material is conventional diesel oil, the plasma reactor is CTP-2000K, and a dielectric barrier discharge reactor is used to generate low-temperature plasma at normal temperature and pressure. The preparation process is:
[0050] 1. Feed diesel into the low-temperature plasma reaction chamber, and the liquid level is lower than the air inlet;
[0051] 2. After the air inlet is blocked, place it in the HY-4 speed-adjustable multi-purpose oscillator for 5 minutes;
[0052] 3. Fix the low-temperature plasma reaction chamber between the two media of the plasma reactor, and open the air inlet;
[0053] 4. Connect the gas circuit to the inlet gas of the reaction chamber, turn on the gas pump and let the flow rate be 30L / (min.m 2 )air;
[0054] 5. Turn on the low-temperature plasma reactor, adjust the output power to 100W, and the working current to 2-3A to g...
Embodiment 2
[0061] Example 2: A method for preparing a low-order coal slime heteropolar collector by modifying hydrocarbon oil. The raw material is conventional kerosene, the plasma reactor is CTP-2000K, and a dielectric barrier discharge reactor is used to generate low-temperature plasma at normal temperature and pressure. The preparation process is:
[0062] 1. Feed kerosene into the low-temperature plasma reaction chamber, and the liquid level is lower than the air inlet;
[0063] 2. After the air inlet is blocked, place it in the HY-4 speed-adjustable multi-purpose oscillator for 5 minutes;
[0064] 3. Fix the low-temperature plasma reaction chamber between the two media of the plasma reactor, and open the air inlet;
[0065] 4. Connect the gas circuit to the inlet gas of the reaction chamber, turn on the gas pump and let the flow rate be 30L / (min.m 2 )air;
[0066] 5. Turn on the low-temperature plasma reactor, adjust the output power to 100W, and the working current to 2-3A to g...
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Abstract
The invention discloses a method for preparing a low-rank coal slime bipolar collecting agent through modification of hydrocarbon-type oil. The bipolar collecting agent is formed through reaction of the hydrocarbon-type oil and air. The preparing process comprises the following steps that 1, the conventional hydrocarbon-type oil is fed into a low-temperature plasma reaction chamber; 2, a reactionchamber body is placed in an oscillator for 3-5 min, and medicament is evenly distributed in the reaction chamber; 3, air with the quantity of flow being 30 L / (min.m<2>) is led into a plasma reactor;4, the low-temperature plasma reactor is started to make the hydrocarbon-type oil react with the air for 5-10 min; 5, the low-temperature plasma reactor is shut down; and 6, air leading is stopped, reaction products are taken out of the reactor, and the bipolar collecting agent is prepared. The method for preparing the low-rank coal slime bipolar collecting agent through modification of the hydrocarbon-type oil has the advantages that the preparation method is simple, raw materials are easy to get, the process is efficient, and the medicament property is stable by taking chemical change as priority; and by using the collecting agent prepared through the method, the low-rank coal slime flotation clean coal productivity can be greatly improved under the same medicament dosage.
Description
technical field [0001] The invention relates to the field of coal slime flotation. Aiming at the problems that traditional hydrocarbon oil collectors have weak collection ability for low-order coal slime and low flotation yield, the invention provides a method for preparing heteropolar collector method. Background technique [0002] Low-rank coal slime is a fine-grained coal resource produced in the thermal coal separation process. The annual output is roughly estimated to be about 200 million tons at a yield of 10%. But at present, it is mainly sold or stockpiled by blending coal. At the same time, raw material lump coal for power generation and coal chemical industry must be pulverized before use. Direct use of upgraded low-rank coal slime can not only save 10% of production costs but also simplify process configuration. The development of high-efficiency upgrading methods for low-order coal slime is of great significance for improving resource utilization and reducing t...
Claims
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