If I got this right, you want to mount a directory called "Clones" which is located on your sdb2 partition. First of all, you need to mount the filesystem of the device sdb2 somewhere, eg /media/sdb2. Then you need to mount the directory "/media/sdb2/Clones" to your mountpoint, eg /home/partimag. I think this is done with bind mount option. Check the man page of mount tool.
mount --bind /media/sdb2/Clones /home/partimag