Concentrated sulfuric acid negative pressure discharging system

Abstract

The invention belongs to the technical field of concentrated sulfuric acid discharging, and particularly relates to a concentrated sulfuric acid negative pressure discharging system. The concentrated sulfuric acid negative pressure discharging system is characterized in that the concentrated sulfuric acid negative pressure discharging system is mainly composed of an acid discharging device, an acid storage device, two eccentric screw pumps and a control box, wherein the acid storage device is connected with the acid discharging device through an acid discharging pipeline, and the two eccentric screw pumps are connected with the acid storage device. According to the concentrated sulfuric acid negative pressure discharging system, an artesian negative pressure acid discharging mode is adopted, the acid discharging process is simple, acid discharging speed is moderate, and the system is high in automation degree, safe and reliable. The eccentric screw pumps are further adopted to convey and add concentrated sulfuric acid, the conveying and the accurate addition of the concentrated sulfuric acid are blended into a whole, the whole facility is distributed on the ground, height difference is saved, the operation is simple, and investment is small.

Description

technical field [0001] The invention belongs to the technical field of concentrated sulfuric acid unloading acid, in particular to a concentrated sulfuric acid negative pressure acid unloading system. Background technique [0002] At present, many iron ore concentrators use sulfuric acid as a regulator in hematite reverse flotation. Various starches (such as corn starch) are often used as inhibitors in reverse flotation, and these starches will eventually enter the subsequent filtration operations along with iron concentrate. Due to the high viscosity of starch, the starch in these iron concentrates will gradually block the filter cloth, reducing the filtration efficiency, and it is very difficult to clean the filter cloth. Therefore, the iron concentrate after reverse flotation is filtered, and the starch must be processed before filtering. The current treatment method is to add sulfuric acid to the pulp before filtering to acidify the starch and remove the stickiness of ...

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Problems solved by technology

At present, most ore concentrators use the method of siphon box to add concentrated sulfuric acid. This method requires a height difference and a certain overflow. The transportation and addition of concentrated sulfuric acid are two systems, and the process is complicated and difficult to control.

Since this method uses positive pressure to discharge acid, the system is complex, the speed of acid discharge is high, it is not easy to control, and it is easy to cause sulfuric acid leakage, so this method does not meet the requirements of environmental protection and safety.

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