Circulating pulp preparation system used in iron ore concentrate pipeline transportation and control method thereof

Abstract

The invention relates to a circulating pulp preparation system used in iron ore concentrate pipeline transportation and a control method thereof. The circulating pulp preparation system comprises a process water tank, an accident pond, a pulp pump and an underflow pump. The accident pond is provided with a pulp discharge pipeline. The process water tank and the accident pond are connected by an overflow pipeline. The accident pond is connected with a stirring tank by a pulp pipeline. The pulp pipeline is provided with the underflow pump. The process water tank is also connected with the stirring tank by a pipeline. The pipeline is provided with the pulp pump. The process water tank, the accident pond, the pulp pump and the underflow pump are used coordinately, thus, the circulating pulp preparation system of the invention can collect and re-process the low concentration beginning and tail pulp which are nonstandard in the pulp transportation to make the nonstandard beginning pulp and tail pulp reach the standard, and directly transports the standard beginning pulp and tail pulp to the steel works by the pipeline. Therefore, the system does not need mechanical excavating, also does not need to dry the pulp in situ, cannot cause environment pollution, also reduces the labor intensity and saves the economic cost.

Description

technical field [0001] The invention relates to a circulating pulping system and a control method thereof, in particular to a circulating pulping system used in iron ore concentrate pipeline transportation and a control method thereof. Background technique [0002] Long-distance iron ore concentrate pipeline transportation is an emerging and high-tech industry, and it is also a highlight of low-carbon and green economy. Long-distance slurry pipeline transportation requires a slurry concentration of 62% to 68% and involves multi-stage pumping station pressurization. [0003] In the process of connecting and transporting multi-stage pumping stations, slurry with low concentration such as head and tail that does not meet the process requirements and standards needs to be discharged, stored and treated. In the traditional design, only a large volume (for example: 2160 cubic meters) process pool was built. In this way, the pulp heads and tails with substandard concentrations ca...

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Problems solved by technology

[0008] The present invention designs a circulating pulping system and its control method for iron ore concentrate pipeline transportation, which solves the following technical problems: (1) The process pool cannot store water during the cleaning of ore accumulation, which cannot meet the requirements of non-stop production Need; (2) Severe environment where the slurry is cooled and dried on site, which is likely to cause pollution; (3) The fine iron ore powder excavated from the process pool is transported to the steel plant, and it will cost a huge amount of transportation costs for long-distance transportation

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