A dross transportation conveyor includes a group of transportation plates configured to transport dross generated by irradiation of a laser beam on a workpiece. The group of transportation plates includes a first transportation plate extending in a first direction and a second transportation plate extending in the first direction and disposed to be adjacent to the first transportation plate. The first transportation plate includes a first front end portion, a first rear end portion, and a first middle portion connecting the first front end portion with the first rear end portion and having a first concave portion that extends in the first direction.

An article such as a conveyor belt includes an elastomeric composition containing a unique flame-retardant system that includes intumescent graphite along with other flame retardant(s) that cooperate in synergist effect to achieve certain flame resistance criteria while also providing suitable abrasion resistance. The flame retardants of the system may include halogenated compound(s) from 5 phr to 25 phr, antimony trioxide compound(s) from 1 phr to 15 phr, alumina trihydrate compound(s) from 2 phr to 25 phr, and intumescent graphite(s) from 1 phr to 10 phr. The flame retardants may cooperate in synergistic effect such that the cured elastomeric compound has (i) an afterglow value of less than 100 seconds in accordance with testing under ASTM D378 13.2 as associated with flame resistance; and (ii) a non-rotating DIN abrasion value of less than 150 mm.sup.3 according to DIN 53516, Method A as associated with abrasion resistance.