A method for crushing coal gangue by high-pressure rollers and recovering coal
A coal gangue and high-pressure roller technology, which is applied in the processing of coal gangue, high-pressure roller crushing of coal gangue and coal recovery, can solve problems such as environmental pollution and land occupation, and achieve improved sorting accuracy, reasonable recycling and utilization, and solution high degree of effect
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Embodiment 1
[0022] Coal gangue is the washing gangue of the coking coal washing plant, and the ash content is 63.62%. Use high-pressure roller mills to classify coal gangue after superfine crushing. The process steps are as follows:
[0023] (1) Use a jaw crusher to crush the coal gangue to a feed particle size suitable for high-pressure roller mill crushing below 20 mm;
[0024] (2) Carry out high-pressure roller mill ultra-fine crushing to the crushed coal gangue. The pressure between the rollers during the high-pressure roller mill work is 5.5MPa, the roll speed is 1.6m / min, and the roll gap is 3mm. After the high-pressure roller mill is ultra-fine crushed The product should be sieved with a sieve with a sieve hole of 3mm. The material on the sieve is returned to the high-pressure roller mill to be combined with the new feed material and then crushed. The material under the sieve is deslimed. The products after sliming should be re-selected by shaking table to obtain coarse clean coal...
Embodiment 2
[0029] Coal gangue is the washing gangue of the coking coal washing plant, and the ash content is 71.79%. Use high-pressure roller mills to classify coal gangue after superfine crushing. The process steps are as follows:
[0030] (1) Use a cone crusher to crush the coal gangue to a feed particle size suitable for high-pressure roller mill crushing below 20mm;
[0031] (2) Carry out high-pressure roller mill ultra-fine crushing to the crushed coal gangue. The pressure between the rollers during the high-pressure roller mill work is 6.0MPa, the roll speed is 1.0m / min, and the roll gap is 3mm. After the high-pressure roller mill is ultra-fine crushed The product should be sieved with a sieve with a sieve hole of 3mm. The material on the sieve is returned to the high-pressure roller mill to be combined with the new feed material and then crushed. The material under the sieve is deslimed. The products after sliming should be re-selected with a spiral separator to obtain coarse cle...
Embodiment 3
[0036] Coal gangue is the washing gangue of the coking coal washing plant, and the ash content is 71.91%. Use high-pressure roller mills to classify coal gangue after superfine crushing. The process steps are as follows:
[0037] (1) Use a jaw crusher to crush the coal gangue to a feed particle size suitable for high-pressure roller mill crushing below 50 mm;
[0038](2) Carry out high-pressure roller mill ultra-fine crushing to the crushed coal gangue, the pressure between the rollers when the high-pressure roller mill is working is 4.0MPa, the roll speed is 3.0m / min, the roll gap is 6mm, and the high-pressure roller mill is ultra-fine. The product should be sieved with a sieve with a sieve hole of 6mm. The material on the sieve is returned to the high-pressure roller mill to be combined with the new feed material and then crushed. The material under the sieve is deslimed. The products after sliming should be re-selected with a spiral separator to obtain coarse clean coal I ...
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