Technics for expelling poison for chromic slag
A treatment process and technology for chromium slag, applied in the field of chromium slag detoxification treatment technology, can solve the problems of inability to utilize chromium slag in large quantities, low degree of automation, large floor space, etc., achieve good detoxification effect, reduce equipment investment, reduce The effect of governance costs
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[0015] Example 1
[0016] First, the barium chloride is dissolved and diluted with water to form a solution, and the barium carbonate is dissolved and diluted to form a suspension, and the chromium slag with a water content of 25% enters the ball mill for mixing. The chromium slag enters the ball mill through the feeder and belt conveyor. During mixing, the chromium slag, solution and suspension collide with the iron balls of the ball mill to crush the chromium slag. The hexavalent chromium in the chromium slag continuously dissolves during the collision and crushing process and fully contacts with the barium ions in the solution. It reacts quickly, pulverizing, ball milling, and dissolving at the same time to produce barium chromate which is insoluble in water.
[0017] All the materials after the ball milling reaction are passed through a 300 mesh / inch grading sieve. The materials passing through the grading sieve with a moisture content of 85% enter the amplitude flow thickener...
Example Embodiment
[0019] Example 2
[0020] The difference from Example 1 is that the barium chloride is dissolved and diluted with water to form a solution, and the barium carbonate is dissolved and diluted to form a suspension, and the chromium slag with a water content of 21% enters the ball mill for mixing at the same time. The materials after the ball milling reaction are all sieved through a 200 mesh / inch grading sieve. The moisture content of the material after passing the grading sieve is 83%, and the thickened material is a slurry with a moisture content of 48%. Add an appropriate amount of ferrous sulfate to the slurry in the quality control adjustment mixing tank. The water content of the filtered residue after the treatment is 33%.
Example Embodiment
[0021] Example 3
[0022] The difference from Example 1 is that the barium chloride is dissolved and diluted with water to form a solution, and the barium carbonate is dissolved and diluted to form a suspension, and the chromium slag with a water content of 18% enters the ball mill for mixing at the same time. The materials after the ball milling reaction are all sieved through a 120 mesh / inch grading sieve, the moisture content of the material after passing the grading sieve is 80%, and the thickened material is a slurry with a moisture content of 45%. The water content of the filtered residue after the treatment is 30%.
[0023] Beneficial effect
[0024] In the production test of the roadbed stabilized soil of Examples 1, 2, and 3, according to 71kg of filter residue, 50kg of river sand, 6.5kg of lime, and 10.5kg of cement, they were mixed evenly and pressed into a square with a thickness of 30cm. After 7 days, the test Its compressive strength ≥ 5Mpa, compaction degree CBR ≥ 9...
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