Synergistic reduction of iron oreIron ore reduction by biocharBiochar and hydrogenHydrogen was studied by reduction of the biocharBiochar iron-ore composite briquetteBriquette under temperatures from 1073 to 1373 K, and atmospheres with H2 content from 25 vol.% to 100 vol.%. H2 atmosphere. The composite briquetteBriquette had a composition of 79.44 wt.% Fe3O4, 7.26 wt.% FeO, 0.52 wt.% Fe, and 4.58 wt.% C. Thermogravimetric tests were carried out. The experimental results in the mass-loss curve, final iron-oxide reduction fraction, and final biocharBiochar gasificationGasification fraction were compared with the predictions of the previously developed model. Results showed that the experimental measurements and model predictions were in good agreement under ags = 25 m2·m−3. Model simulationsSimulation revealed that the gaseous products from the briquetteBriquette reaction were dominantly CO, H2O. In the investigated scope, both the iron-oxide reduction and the biocharBiochar gasificationGasification increased with the increase in temperature, and the influence on biocharBiochar gasificationGasification was more evident than on iron-oxide reduction. Increasing H2 content in the atmosphere had a positive effect on the briquetteBriquette reduction when H2 content was less than 75 vol.%, and the influence became very weak when H2 content was more than 75 vol.%.