SU572509A1 - Method of segregating roasting of ferrous materials - Google Patents

Description

Example 1. The original iron cake has the composition: 10.14% nickel; 2.99% copper; 29.15% iron; 6.45% sulfur; 318.6 g / t of the sum of latina, palladi, give birth, iridi, gold.

5 1G cakes are mixed with 0.6 ir of sodium silicofluoride and 1 g of coal. The mixture is cracked into a bed, which has an atmosphere of air and is heated to 7-5 ° C. Then the furnace is heated at a rate of 7: g, rad / M1I1n to 980 ° C. After holding at this temperature for 3 hours (time taken with excess), the cake is cooled, crushed to a particle size of 90% -2 mm and suspended .

The weight of the non-magnetic fraction enriched with non-ferrous and noble metals is 0.87 g. Extraction into this product is: 76.9% copper; 77.35% Nickel; 1.93% iron; 78.98% platinum; 76.00% palladium; 65.00% give birth; 66.63% iridium; 77.49% gold.

The non-magnetic fraction contains 45.00% nickel; 13.20% copper; 3.22% iron; 1365 g / t of the sum of llatina, palladi, rodi, iridi and gold.

Example 2. A mixture prepared from 5 g of iron (its composition is given in the example), 0.6 g of sodium silicofluoride and 1 g of coal are placed in a furnace heated to 890 ° C and having an oxidizing atmosphere. It is then heated to 960 ° C at a rate of 7 deg / min. After holding for 3 hours at this temperature, the calcine is removed from the furnace, after cooling, ground to a particle size of 87% -2 m, m and subjected to magnetic separation.

The weight of the non-magnetic fraction is 0.89 g. Extraction into the specified fraction is: 78.01% nickel; 79.4% copper; 2.34% iron; 76.4% of the sum of platinum, palladium, rodi, iridi, gold.

The non-magnetic fraction contains 44.5% nickel; 13.32% copper; 3.82% iron; 1369 g / t of the amount of platinum, palladi, give birth, iridi, gold.

As can be seen from the above examples, the resulting concentrate is colored and noble.

metals transferred to a small amount of iron.

The segregation process is carried out with respect to

Na, SlP,

H “.- 0.91.

No. + C

The specific consumption of the segregating reagent in the known methods is higher. This is due to the fact that B 1 g of sodium silicofluoride contains fluoride atoms approximately 1.75 times more than chlorine atoms in 1 g of kalycium chloride.

The described process has the following advantages:

co-extraction of nickel, copper and noble metals from oxidized ferrous sulfur-containing material into a high-quality concentrate is ensured;

it is possible to obtain a concentrate containing a minor amount of iron (less than 4%);

reduced preheating time of the charge to operating temperature;

The specific consumption of segregation reagent is reduced.

Claims (1)

Invention Formula The method of segregating roasting of ferrous materials containing non-ferrous metals in the presence of reagents, carbon-containing substances and fluxes at 950-1000 ° C with stepwise heating of the binder in an oxidizing atmosphere, followed by grinding and enrichment, is characterized in that, in order to reduce the heating time and the consumption of reagents, alkali metal silicofluoride is introduced as a reagent into the starting material | 1 and heating to the burning temperature is carried out at a rate of 3–40 deg / min. Sources of information accepted (IN attention during examination 1. Copyright certificate № 395459, class C 22В 1/08, 1972.