| 摘要 |
This invention relates to a method of enhanced recovery of phosphate in the double flotation process for the benefication of phosphate ore, more particularly to the use of pH modifiers-silica depressants: sodium silicate; soda ash (Na2CO3); or soda silicate and soda ash, alone or in combination with one or more ingredients selected from the group consisting of: starch, dextrin, sodium sulfite and trisodium phosphate, added to the casutic or ammonia reagent used to prepare the patty acid-fuel oil mixture in the first stage of the double flotation process.
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