Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method

The invention provides a vanadium slag modifier for converter vanadium extraction and a converter vanadium extraction smelting method. The converter vanadium extraction smelting method comprises the following steps: after converter vanadium extraction oxygen blowing is completed, feeding ferrosilicon grains onto the surface of converter slag, standing, subsequently turning down the converter to discharge steel and vanadium slag, wherein the particular size of the ferrosilicon grains is no greater than 3 mm; the added amount of the ferrosilicon grains is 0.1-0.2 kg/ton; the vanadium slag modifier consists of ferrosilicon grains which are prepared from the following components in parts by weight: 65-70 parts of Si and 30-35 parts of Fe. Compared with the prior art, the vanadium slag modifier for converter vanadium extraction and the converter vanadium extraction smelting method provided by the invention have the benefits that the total iron content of the vanadium slag is reduced, and the grade of the vanadium slag is ensured or improved.