Process and device for reducing water of rotary kiln slurry by cement wet process

The present invention discloses slurry water reducing and wet cement calcining process and apparatus in rotary kiln. The technological process includes the following steps: A. pumping the raw slurry with the slurry pump to vacuum filtering machine; B. pumping the vacuum filtering machine with vacuum pump to 0.02-0.07 MPa vacuum to pump out water from the slurry; C. blowing the material cake with Roots blower into material bin and conveying with conveying machine into rotary kiln; and D. setting the material cake on chain moving from the kiln tail to kiln head for calcining. The apparatus includes vacuum filtering machine, filtrate tank, Roots blower, stirrer, etc. The present invention results in raised yield and lowered power consumption.