High-strength composite furnace charge for blast furnace ironmaking and preparation method of high-strength composite furnace charge

The invention discloses a high-strength composite furnace charge for blast furnace ironmaking and a preparation method of the high-strength composite furnace charge. The technical problem that existing metal iron powder type iron-containing waste is low in strength after cold press molding is mainly solved. According to the technical scheme, the high-strength composite furnace charge for blast furnace ironmaking comprises the following chemical components in percentage by weight: 75%-90% of Fe, 0.1%-0.3% of SiO2, 0.05%-0.2% of CaO, less than or equal to 0.3% of Zn and Na2O + K2Olt, 0.4%, with the balance being unavoidable impurities; the normal-temperature drop strength of the high-strength composite furnace burden is greater than or equal to 3 times/10m * piece, and the normal-temperature compressive strength is gt; each ball is 3000N, and the compressive strength at 1000 DEG C is greater than or equal to 4000N; the high-strength composite furnace charge is not broken after being kept at 1000 DEG C for 60 mi