Abstract: A fly ash treatment method includes: a setting step: finding out an initial viscosity value of initial fly ash; a pickling operation step: adding the initial fly ash, water and an acid to a pickling tank, uniformly stirring the mixture, and detecting and adjusting a ratio of components of slurry in the pickling tank to conform to a variation of the curve in the heavy metal leaching test curve graph; a first quantitative output step: inputting the slurry into a first buffer tank and quantitatively output the slurry; a first filtration step: filtering fine particles in the slurry output by from the first buffer tank; a drying and pulverizing step: removing water from the slurry passing through the first filter, and performing pulverizing to form powder; and a rotary kiln cracking step: cracking organic matters in the powder by a rotary kiln, and collecting fly ash cinder.

Abstract: A signboard, which includes a rail, the rail having a longitudinally extended bottom opening, two parallel flanges longitudinally downwardly extended at two opposite sides of the bottom opening, at least one longitudinal coupling groove on the periphery thereof, and two longitudinal mounting grooves bilaterally disposed on the inside; a LED circuit board mounted in the longitudinal mounting grooves inside the rail, the LED circuit board having a plurality of light emitting diodes at a bottom side thereof; a light conducting board mounted in the bottom opening on the rail and fixedly connected between the parallel flanges, the light conducting board having a design; two end caps respectively covered on two distal ends of said rail; and a plurality of mounting members respectively fastened to the rail for positioning, said mounting members each having at least one coupling rib respectively coupled to the at least one longitudinal coupling groove on the rail.