Raw material pre-treatment method and raw material pre-treatment process system suitable for kiln phosphoric acid process

A raw material pre-treatment process system for kiln phosphoric acid process, comprising a carbonaceous reductant pre-treatment system, a phosphate ore pre-treatment system and a silica pre-treatment system which are independent from one another,

• a first outlet of the carbonaceous reductant pre-treatment system, a first outlet of the phosphate ore pre-treatment system and a first outlet of the silica pre-treatment system are all connected to a core pellet material mixer via a first delivery device, and
• a second outlet of the carbonaceous reductant pre-treatment system and a second outlet of the silica pre-treatment system are both connected to a shell material mixer via a second delivery device which is independent from the first delivery device,
• the carbonaceous reductant pre-treatment system, where a carbonaceous reductant is pretreated, comprises a first single-stage crushing device, a carbonaceous reductant intermediate bin, a first ore grinding device, a carbonaceous reductant powder storage bin and a first formulating device, which are connected in sequence,
• the phosphate ore pre-treatment system, where a phosphate ore is pretreated, comprises a second single-stage crushing device, a phosphate ore intermediate bin, a second ore grinding device, a homogenization silo and a second formulating device, which are connected in sequence,
• the silica pre-treatment system, where silica is pretreated, comprises a third single-stage crushing device, a silica intermediate bin, a third ore grinding device, a silica powder storage bin and a third formulating device, which are connected in sequence, or comprises a dual-stage one-closed-loop crushing device, the silica intermediate bin, the third ore grinding device, the silica powder storage bin and the third formulating device, which are connected in sequence,
• the first, second and third single-stage crushing devices each comprise one or a combination of a hammer crusher and an impact crusher,
• the dual-stage one-closed-loop crushing device comprises a jaw crusher, a screening machine and a cone crusher which are connected in sequence, and a discharge port of the cone crusher is connected to a feed port of the screening machine to form a recirculation loop,
• the first ore grinding device in the carbonaceous reductant pre-treatment system comprises a vertical grinder or an air swept mill and is connected to the carbonaceous reductant powder storage bin via a first powder material-collecting and delivering device,
• the second ore grinding device in the phosphate ore pre-treatment system comprises a vertical grinder or an air swept coal mill and is connected to the homogenization silo via a second powder material-collecting and delivering device,
• the third ore grinding device in the silica pre-treatment system comprises a ball grinder and/or a high-pressure roller press and is connected to the silica powder storage bin via a third powder material-collecting and delivering device,
• the first, second and third powder material-collecting and delivering devices each comprise a cyclone powder-collector, a pouch powder-collector and a blower which are connected in sequence.