Method for improving characteristics of precipitated iron F-T catalyst precursor slurry, slurry, preparation method for slurry, catalyst prepared from slurry and preparation method for catalyst

The invention provides a method for improving solid content, fluidity and pumpability of precipitated iron F-T catalyst precursor slurry. The method is characterized in that at least one water reducer or super-plasticizer is added into the precipitated iron F-T catalyst precursor slurry, wherein a weight ratio of solid in the catalyst precursor slurry to the water reducer or super-plasticizer is 1: 0.0002-0.05. The invention also provides the precipitated iron F-T catalyst precursor slurry and a preparation method thereof and a precipitated iron F-T catalyst prepared from the precipitated iron F-T catalyst precursor slurry. Moreover, the invention further provides a preparation method for the precipitated iron F-T catalyst and the precipitated iron F-T catalyst prepared by using the preparation method.