Concentrated sulfuric acid negative pressure acid unloading system

Abstract

The invention belongs to the technical field of concentrated sulfuric acid unloading acid, and particularly relates to a concentrated sulfuric acid negative pressure acid unloading system, which is characterized in that it mainly consists of an acid unloading device, an acid storage device connected to the acid unloading device through an acid unloading pipeline, and the acid unloading device. It consists of two eccentric screw pumps connected to the acid storage device and a control box. The concentrated sulfuric acid negative pressure acid unloading system of the present invention adopts a self-flowing negative pressure acid unloading method, the acid unloading process is simple, the acid unloading speed is moderate, the system is highly automated, safe and reliable, and an eccentric screw pump is also used to transport and add concentrated sulfuric acid. Integrating the transportation and precise addition of concentrated sulfuric acid, the entire facility is arranged on the ground, saving height difference, simple operation, and small investment.

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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