Treatment process and system for carbide slag

Abstract

The invention provides a treatment process and system for carbide slag. The treatment process for carbide slag comprises the following steps: first, performing preliminary drying, adding dry powder into carbide slag with water content of no less than 35%, and carrying out mixing and dispersing; then, pressing the obtained mixture into pellets; and then, drying the pellets obtained after pressing.According to traditional methods, the water content of carbide slag can be maximally decreased to about 40% through filter-pressing and dewatering of the carbide slag, and when the treated carbide slag is used for manufacturing calcium oxide or calcium hydroxide, the treated carbide slag is prone to bonding into blocks, which influences production efficiency and production yield. However, when thetreatment process of the invention is applied to production of calcium oxide or calcium hydroxide, the dry powder is added into the carbide slag to further reduce the water content of the carbide slag, so the problem that carbide slag bonds to form blocks is eliminated, the effect of rapid water removal is achieved, and the need for high-efficiency industrial production can be met.

Description

technical field [0001] The invention relates to a process and system for treating carbide slag. Background technique [0002] Acetylene, as an important raw material in the organic synthesis industry, has a large demand every year, and calcium carbide is the main raw material for industrial production of acetylene. When calcium carbide is used to produce acetylene, each ton of calcium carbide can produce about 1.2 tons of calcium carbide slag (mainly composed of hydrogen Calcium oxide), thus producing a large amount of carbide slag. The calcium carbide slag produced in the production of acetylene contains a large amount of water, and its shape is slurry. It is difficult to store and transport. These calcium carbide slags accumulate for a long time and occupy a large amount of land. They will also cause pollution and corrosion to the land, and also cause energy consumption. waste. [0003] In view of such problems, the prior art proposes a method of producing lime by using ...

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Problems solved by technology

Although this method recycles calcium carbide slag to a certain extent, the water content of calcium carbide slag is still about 40% after dehydration by the existing dehydration method, the viscosity is very high, and there is a large amount of agglomeration. Granulator granulation, in the process of transporting the spherical pellets to the drying furnace, it will be bonded again, or even bonded in the drying furnace, which seriously affects the use of the drying furnace, and also affects the drying effect of the calcium carbide slag. Poor, affecting yield

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