Phosphorite flotation process

The invention discloses a phosphorite flotation process, which comprises the following steps that (1) collophanite raw ore is ground; (2) ground ore products in the first step are subjected to reverse flotation de-magging, and magnesium-containing flotation foam and flotation underflow are obtained; (3) flotation underflow in the second step is subjected to reverse flotation desulfurization, and first sulfur-containing flotation foam and flotation underflow are obtained; (4) the flotation underflow in the third step is subjected to reverse flotation desiliconization, and silicon-containing flotation foam and flotation underflow are obtained; (5) the flotation underflow in the fourth step is subjected to strong magnetic separation deferrization, magnetic products and non-magnetic products are obtained; (6) the non-magnetic products in the fifth step are ground; (7) ore grinding products in the sixth step and desulfurization flotation reagents take effect, and are subjected to reverse flotation desulfurization, and second sulfur-containing flotation foam and flotation underflow are obtained; (8) the flotation underflow in the seventh step and dealuminizing flotation reagents take effect and are subjected to reverse flotation dealuminizing, and aluminum-containing flotation foam and flotation underflow are obtained.