Method for purifying graphite from waste cathode carbon block
A technology of waste cathode carbon block and graphite, which is applied in the direction of chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., and can solve the problems of high processing cost, unsuitable for industrialized production, and high cost
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Embodiment 1
[0034] The method for purifying graphite from spent cathode carbon blocks of the present embodiment may further comprise the steps:
[0035] 1) Use a jaw crusher (jaw crusher) to coarsely crush the waste cathode carbon block to obtain a sample with a particle size of 10-20mm; then use a ball mill to finely crush the coarsely crushed sample, and then sieve the finely crushed sample to obtain a particle size For fine samples of 0.075-0.15mm, the samples that do not pass through the sieve are crushed again and sieved to obtain fine samples;
[0036] 2) Add 30L of water, 10L of petroleum ether and 0.58kg of sodium hydroxide to each 1kg of fine sample, ultrasonically (ultrasonic frequency is 40Hz) at room temperature for 1h and then centrifuge (the speed of centrifugation is 8000r / min, time is 10min), take the precipitate ;
[0037] 3) Add 5L of absolute ethanol to the centrifuged precipitate, mix well and centrifuge to take the precipitate, then add 5L of petroleum ether to the p...
Embodiment 2
[0039] The method for purifying graphite from spent cathode carbon blocks of the present embodiment may further comprise the steps:
[0040] 1) The waste cathode carbon block is coarsely crushed by a jaw crusher to obtain a sample with a particle size of 10-20mm; the coarsely crushed sample is finely crushed by a ball mill, and then sieved to obtain a particle size of 0.1-0.15mm Fine samples, the samples that do not pass through the sieve are crushed again and sieved to obtain fine samples;
[0041] 2) Add 20L of water, 10L of petroleum ether and 0.58kg of sodium hydroxide to each 1kg of fine sample, ultrasonically (ultrasonic frequency: 40Hz) at room temperature for 30min and then centrifuge (rotating speed during centrifugation: 8000r / min, time: 10min), take the precipitate ;
[0042] 3) Add 5L of absolute ethanol to the centrifuged precipitate, mix well and centrifuge to take the precipitate, then add 5L of petroleum ether to the precipitate, centrifuge (centrifugation spe...
Embodiment 3
[0044] The method for purifying graphite from spent cathode carbon blocks of the present embodiment may further comprise the steps:
[0045] 1) The waste cathode carbon block is coarsely crushed by a jaw crusher to obtain a sample with a particle size of 10-20mm; the coarsely crushed sample is finely crushed by a ball mill, and then sieved to obtain a particle size of 0.1-0.15mm Fine samples, the samples that do not pass through the sieve are crushed again and sieved to obtain fine samples;
[0046] 2) Add 20L of water, 10L of petroleum ether and 0.58kg of sodium hydroxide to each 1kg of fine sample, ultrasonically (ultrasonic frequency is 40Hz) and leaching at room temperature for 30min, then filter to get the filter residue;
[0047] 3) Add 5L of absolute ethanol to the filter residue, filter and take the filter residue after fully mixing, then add 5L petroleum ether to the filter residue, filter and dry after fully mixing to obtain a graphite product with a purity of 87.1%....
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