METHOD FOR PURIFYING SODIUM ALUMINATE LIQUORS CONTAINING SODIUM OXALATE AND ENHANCING RESIDUES

摘要

a method for eliminating sodium oxalate from at least one portion (14).decomposed bayer aluminate liquor(2) (v) obtained after concentration in bayer alumina production cycle.comprising the precipitation of said oxalate which isdissolved by means of a finely divided lime based (c1) destabilizing agent(f) followed by separation of the solid residues from thedeoxalation (s4) of the liquor (16) which is recycled as an alkaline leachingliquor for bauxite into desolation residues (s4) areused to decarbonate and deoxalate industrial water. the method is particularlythe problem in industrial water and raw water.however, water from the bayer plant and said water is redirected towards the washingthe insoluble residues from the bayer cycle for cycle oncetreatment has occurred.method for the removal of sodium oxalate from at least a portion (14).the aluminate liquor bayerdecomposed (l2) collected after concentration (v) in the bayer cycleproduction of alumina with the precipitation of calcium oxalatedissolved by means of a destabilizing agent containing lime (c1))(f) divided and separation of solid wastedu00e9soxalatation (s4), the recycled liquor alkali liquor (16)the attack of bauxite residue (s4) du00e9soxalatationare used to du00e9carbonater and du00e9soxalater industrial water. thethe process is particularly advantageous whenindustrial wastewater is of the raw water or water from abayer and managed facility after treatment to the chain.aqueous insoluble residues of the chain 1.