SU1217904A1 - Flux for treating alloys of non-ferrous metals - Google Patents

Description

The invention relates to the production of non-ferrous alloys, in particular the smelting and refining of tin bronzes.

The purpose of the invention is to increase the protective and refining ability of the flux to reduce metal loss from the slag and the carbon loss of components during the treatment of tin bronzes.

Flux containing carbon-containing material, silicon dioxide and soda, additionally contains waste phosphorus production in the following ratio of ingredients, wt,%:. Waste

phosphate production Carbonaceous material

Silicon Dioxide Soda

45-55

6-12

15-25 Else

Lime-phosphorus sludge, substandard phosphorite, agglomerate, apatite concentrate, containing, in wt.%, Are used as wastes of phosphorus production:

phosphorus 25-40 oxide

Calcium 35-55 Impurities (magnesium oxide, calcium fluoride, silica, etc.) Else Dp creating conditions for the flow of redox reactions in the melt and protect the furnace lining from the furnace from the premature eroding or slagging

 0.8-1.1.

Phosphorus pentoxide with carbon contributes to the refining of the alloy, and the resulting compounds are easily raised and partially evaporated. -. The slag has moderate viscosity and fluid mobility, which provides a fairly good protection of the mV tal mirror against oxidation during the smelting process.

Table 1 presents the compositions for testing the proposed flux, Table. 2 shows the properties of the proposed flux in comparison with the known.

The proposed flux tested at

smelting tin bronze Br08ts4. Melting is carried out in an induction furnace with a graphite-chamotte crucible. The flux is prepared by mechanical stirring and calcined at 800 ° C in

for 2 hours. The melting of bronze is carried out under a layer of flux in an amount of 2% by weight of metal sinter. The results shown in the tables show that the proposed flux has the best

protective-refining ability and reduces the irretrievable loss of the metal removed from the slag, and from metallurgical intoxication, compared with the known.

Phosphoric waste

production in the composition of the flux is determined in close connection with their chemical composition and the necessary quality of other components. When the content of apatite concentrate

more than 55% and the required amount of silicon dioxide (composition no. 5), the slag is thick, slow-moving, while its deterioration

refining properties and increased metal loss with slag. When the content of apatite concentrate is less than 45% and the corresponding reduction of silicon oxide, the mass fraction of soda increases, which makes the slag (composition No. 1) liquid, reducing its protective-refining capacity and increases the loss of metal from the slag and from the carbon monoxide. The flux can be used for refining tin bronzes, incl. when used in the charge of waste scrap, chips, known alloy. The economic effect is obtained through the use of cheap components, primarily phosphorus waste.

Compositions with the content of components that go beyond the proposed,

Table 2

Table D

Claims (3)

1 . FLUX FOR PROCESSING NON-FERROUS METAL ALLOYS, containing carbon-containing material, silicon dioxide and soda, characterized in that, in order to increase the protective and refining ability of the flux, to reduce metal loss with slag and the burning of components during the processing of tin bronzes, it additionally contains phosphorus waste production in the following ratio of ingredients, wt. X: Phosphorus Waste Carbon-containing Material Silicon Dioxide Soda 45-55 6-12 15-25 Rest· 2. Flux pop. 1, characterized in that it contains waste phosphorus production of the following composition, wt. X: Phosphorus pentoxide '25-40 Calcium Oxide ’35-55 Impurities (magnesium oxide, calcium fluoride, silica, etc.) 3. The flux according to claims 1 and 2, characterized in that the ratio of SiO ₂ to CaO is 0.8-1.1. SU „„ 1217904