The invention discloses a
silicon-block
cutting method, which relates to the technical field of crystalline-
silicon manufacture. The method comprises the following steps of respectively preparing the usage amounts of recycled
silicon carbide and a recycled suspending liquid used in
mortar as 40 to 100 percent, modulating the density of the
mortar as 1.625 to 1.635kg / L, and adding the
mortar according to the effective
cutting length of a silicon block in the
cutting process, wherein the adding proportion of the added mortar is 0.235 to 0.3L / mm, and the adding amount of the mortar is equal to the effective cutting length of the silicon block multiplied by the adding proportion of the mortar; selecting a guiding wheel to enable the notch of the guiding wheel to be matched with a steel wire; setting the cutting speed of the steel wire as 12 to 14m / s, the
moving speed of a worktable as 250 to 330mu m / min and the flow quantity of the mortar as 130 to 160kg / min, cutting the silicon block, and cooling; cutting a structural wire, the outer surface of which is provided with spiral bulges and is coated with an anti-oxidation layer by the steel wire. According to the invention, through the technical matching property of the cutting speed of the steel wire, the
moving speed of the worktable and the flow quantity of the mortar, the updating of the mortar is reduced, the production cost can be lowered, the rate of fragments generated in silicon-block cutting is reduced, the rate of finished products is increased, and the quality of the products is improved.