System for optimizing duration time of high-pressure leaching of laterite nickel ore

A system for optimizing duration time of high-pressure leaching of laterite nickel ore, comprising a data collecting module, an actual duration time calculating module, an optimal duration time determining module, and a duration time control module,

• wherein the data collecting module is configured to collect qualities of pulp, sulfuric acid, and steam that enter an autoclave within a unit time during a high-pressure leaching process, outlet temperatures of a high-temperature preheating tower, a medium-temperature preheating tower, a low-temperature preheating tower, a high-temperature flash tank, a medium-temperature flash tank, and a low-temperature flash tank, a leaching temperature of the autoclave, a composition of the pulp that enters the autoclave within the unit time, and prices of nickel, sulfuric acid, and steam that enter the autoclave;
• the actual duration time calculating module is configured to obtain an actual duration time of the pulp in the autoclave during the high-pressure leaching process, according to the qualities of the pulp, the sulfuric acid, and the steam that enter the autoclave within the unit time during the high-pressure leaching process, the actual duration time of the pulp in the autoclave during the high-pressure leaching process, the outlet temperatures of the high-temperature preheating tower, the mediate-temperature preheating tower, the low-temperature preheating tower, the high-temperature flashing tank, the mediate-temperature flashing tank, and the low-temperature flashing tank, and the leaching temperature in the autoclave;
• the optimal duration time determining module is configured to obtain an optimal duration time corresponding to a maximum income value, according to the qualities of the pulp, the sulfuric acid, and the steam that enter the autoclave within the unit time during the high-pressure leaching process, the outlet temperatures of the high-temperature preheating tower, the mediate-temperature preheating tower, the low-temperature preheating tower, the high-temperature flashing tank, the mediate-temperature flashing tank, the leaching temperature in the autoclave, a composition of the pulp that enters the autoclave within the unit time, and the prices of nickel, sulfuric acid, and steam that enter the autoclave;
• and
• the duration time control module is configured to compare an actual duration time with the optimal duration time under this condition, and control opening degrees of a feed valve and a discharge valve of the autoclave by using a feedback control system, to ensure the actual duration time of the pulp in the autoclave is within the optimal duration time all the time.