EMPLOYEE WAS PUTTING 10B DESLIME THICKNER UNDER FLOW PUMP DISCHARGE LINE TOGETHER. MET TECH OPENED CONE VALVE ON DESLIME THICKNER CAUSING FLOW TO DISCHARGE INTO LINE. FLOW FROM LINE HIT EMPLOY EE'S FACE AREA GETTING COARSE MATERIAL IN EYES. HE WAS EVALUATED BY A PHYSICIAN AND MEDICATION WAS ORDERED FOR HIS EYES.