초록 ▼

A process for separating scheelite from gange wherein the ore is ground with 0.4 to 10 grams of alkali metal carbonate per kg. of ore, forming a pulp and removing sulfide minerals from pulp liquor. Carrying out froth floatation in the presence of paraffin oil, 0.1-0.4 gram of fatty acid per kg. of o

A process for separating scheelite from gange wherein the ore is ground with 0.4 to 10 grams of alkali metal carbonate per kg. of ore, forming a pulp and removing sulfide minerals from pulp liquor. Carrying out froth floatation in the presence of paraffin oil, 0.1-0.4 gram of fatty acid per kg. of ore and 3.2-5.5 grams of sodium silicate per kg. of ore wherein the weight ratio of paraffin oil to fatty acid is 0.5:1 to 2.8:1.

대표청구항 ▼

A process of separating scheelite from gangue in an ore, which process comprises grinding the ore with 4 to 10 grams of an alkali metal carbonate per kilogram of ore, selectively separating sulphide minerals present in a pulp of the ore and then subjecting the pulp comprising desulfided pulp and pul

A process of separating scheelite from gangue in an ore, which process comprises grinding the ore with 4 to 10 grams of an alkali metal carbonate per kilogram of ore, selectively separating sulphide minerals present in a pulp of the ore and then subjecting the pulp comprising desulfided pulp and pulp liquor to froth flotation to separate selectively scheelite, said flotation being carried out in the presence of a paraffin oil, from 0.1 to 0.4 gram of a fatty acid or a soap thereof per kilogram of ore and from 3.2 to 5.5 grams of sodium silicate per kilogram of ore, wherein the ratio by weight of paraffin oil to fatty acid is in the range of from 0.5:1 to 2.8:1 and wherein the amount of oil, alkali metal carbonate and sodium silicate are so correlated that a stable height of froth is maintained on top of the pulp during the flotation, and said froth being controlled by adjusting the sodium silicate level in the flotation to obtain a dissolved silicate level of about 0.8 to about 1.2 grams per liter of pulp liquor and adjusting the initial alkali metal carbonate level according to the condition of the froth at such dissolved silicate level.