SU327832A1 - Charge for obtaining aluminium-silicon alloys - Google Patents

Description

The known charge for the production of aluminum-silicon alloys containing a cross, nez the alumina raw material (aluminosilicate), is carbon-containing. K-: restoring agent (25-35%) n binder - sulfite-alcohol bards (3-5%),

The proposed product differs from the known one in that its composition is supplemented with chlorides (fluorides) in the following ratio of components / wt.%;

Silica-alumina

raw material62-72

Carbon curtain

reducing agent25-35

Binding 0-16

Chlorines, fluorides up to 3 The addition of chlorides (fluorides) is selected from the group consisting of alkali metal chlorides, alkaline earth metal chlorides, alkali metal fluorides, and earth metal fluorides.

This reduces the content in the resulting alloys of iron and titanium impurities, and also intensifies the melting process and reduces power consumption.

harmful impurities of iron and titanium, which are in charge materials, are almost completely transferred to the algamine-silicon alloy, making it difficult to further process it.

The removal of iron and titanium from the alloy is performed by filtering the alloy at a temperature of about 600 ° C, with a large amount of the main components being lost.

In order to increase the quality of the alloys obtained and to increase the amount of suitable material, it has been proposed to introduce alkaline or alkaline-earth metal chlorides or fluorides in an amount up to 3% by weight of the main components.

Iron and titanium, recovering. from oxides, primarily in the form of chlorides or fluorides, are removed together with furnace gases during the smelting process. In this way, the content of these impurities in the resulting alloys can be reduced by 15–20% (relative).

Claims (2)

In addition, alkali or alkaline earth metals, when introduced into sieves of a carbon-containing reductant, activate it, and therefore the specific consumption of electricity and charge materials is reduced. Example 1. A mixture consisting of kyanite concentrate (100 kg), cameic coal (50 kg), a binder (7 kg) and fluoride and sodium (3 kg) is mixed, briquetted, dried at a prn temperature before and melted in a different electric furnace . Example 2. A mixture consisting of {100k hard coal (52 kg) silyimanite concentrate, a binder (7.5 kg) and sodium chloride (3 kg) is mixed, briquetted, dried at the temperature before and melted in electric arc furnace. The charges were tested in semi-factory conditions at the pilot plant of the VAMI Institute. The resulting aluminum-silicon alloy contains impurities of iron and titanium by 15-25% (relative) less than the alloy produced from the mixture without the addition of sodium fluoride. At the same time, the reduction in specific power consumption and charge materials by 1.5-2.0% was also achieved. Claim 1. Batch for producing aluminum-silicon alloy, containing silica-alumina raw material, carbon-containing reducing agent and binder, characterized in that, in order to reduce the content of iron and titanium impurities in the alloys, as well as to intensify the smelting process reduction of energy consumption, in addition the composition of chlorides (fluorides) was added to the composition with the following content of compocentoe, sec.Ss Silica-alumina raw material62-72 Carbon content-reducing agent 25-35 C-o0 0.16 Chloride (fluorides) to 3 2. The mixture according to claim 1, about tl and h and y and the fact that the addition of chloride (fluoride) is selected from the group containing alkali metal chlorides alkaline-earth metal chlorides, alkali metal fluorides, cheek-earth metals fluorides.