A process for utilizing the enthalpy of a syngas by additional and post-gasification of regrowing fuels, wherein: • the finely ground, carbon-containing fuel is introduced, as a mixture with oxygen or an oxygen-enriched gas, from the outside in a horizontal direction concentrically or directed downward from the top into a refractory reaction chamber, in a manner such that the fuel reacts in the reaction chamber by means of an entrained-flow gasification to form syngas, and • the finely ground, carbon-containing fuel is introduced into the reaction chamber at a first burner level which extends over an upstream section of the full height of the reaction chamber in the direction of the gas flow, and • the syngas is obtained at a pressure of 0.1 to 8 MPa and is discharged from the reaction chamber in an upward or downward direction; • following discharge, the syngas obtained thereby is passed into a second reaction chamber which is configured as a collecting chamber and in which the gas which is supplied is mixed with a cooler gaseous, vaporous or liquid substance for the purposes of cooling, and • the dwell time of the syngas in the entrained flow after introducing the fuel and before entry into the downstream collecting chamber for the purposes of cooling in the entrained flow is in the range 1 to 10 seconds; and • a regrowing fuel is concentrically introduced into the reaction chamber at a second or further burner level or at a second or further burner lance level which also extends over a section of the full height of the reaction path and which is disposed downstream of the first burner level in the direction of gas flow, in a manner such that a further entrainedflow gasification occurs by means of which the temperature of the outflowing gas is reduced and the difference in enthalpy is utilized for the additional gasification of regrowing raw materials, characterized in that • the syngas is passed into a quench chamber via a discharge conduit, and a regrowing fuel is concentrically introduced into the quench chamber via burners in the quench chamber in a manner such that a further reaction occurs with the syngas, whereby the temperature of the syngas is further reduced, and the regrowing fuel is introduced into the quench chamber via tangentially disposed feed devices so that a swirling movement is given to the regrowing fuel, whereby the dwell time for the regrowing fuel in the quench chamber is increased. • the finely ground, carbon-containing fuel is introduced, as a mixture with oxygen or an oxygen-enriched gas, from the outside in a horizontal direction concentrically or directed downward from the top into a refractory reaction chamber, in a manner such that the fuel reacts in the reaction chamber by means of an entrained-flow gasification to form syngas, and • the finely ground, carbon-containing fuel is introduced into the reaction chamber at a first burner level which extends over an upstream section of the full height of the reaction chamber in the direction of the gas flow, and • the syngas is obtained at a pressure of 0.1 to 8 MPa and is discharged from the reaction chamber in an upward or downward direction; • following discharge, the syngas obtained thereby is passed into a second reaction chamber which is configured as a collecting chamber and in which the gas which is supplied is mixed with a cooler gaseous, vaporous or liquid substance for the purposes of cooling, and • the dwell time of the syngas in the entrained flow after introducing the fuel and before entry into the downstream collecting chamber for the purposes of cooling in the entrained flow is in the range 1 to 10 seconds; and • a regrowing fuel is concentrically introduced into the reaction chamber at a second or further burner level or at a second or further burner lance level which also extends over a section of the full height of the reaction path and which is disposed downstream of the first burner level in the direction of gas flow, in a manner such that a further entrainedflow gasification occurs by means of which the temperature of the outflowing gas is reduced and the difference in enthalpy is utilized for the additional gasification of regrowing raw materials, • the syngas is passed into a quench chamber via a discharge conduit, and a regrowing fuel is concentrically introduced into the quench chamber via burners in the quench chamber in a manner such that a further reaction occurs with the syngas, whereby the temperature of the syngas is further reduced, and the regrowing fuel is introduced into the quench chamber via tangentially disposed feed devices so that a swirling movement is given to the regrowing fuel, whereby the dwell time for the regrowing fuel in the quench chamber is increased.