Limestone slurry and lime milk preparing device for hydrometallurgy of laterite nickel ore

A limestone slurry and lime milk preparing device for hydrometallurgy of laterite nickel ore, comprising a limestone slurry preparation assembly and a lime milk preparation assembly, wherein:

• the limestone slurry preparation assembly comprises a first feeding machine, a grinding mill, a mixing machine, a first transfer pump, and a first buffer tank, which are connected in sequence;
• the first feeding machine is equipped with a first controller, the grinding mill is equipped with a second controller, the mixing machine is equipped with a third controller, the first transfer pump is equipped with a fourth controller, and the first buffer tank is equipped with a fifth controller;
• the fifth controller is simultaneously connected to the first controller, the second controller, the third controller, and the fourth controller;
• the fifth controller is capable of emitting a first sensing signal and transmitting it to the first controller, the second controller, the third controller, and the fourth controller when the weight of the limestone slurry in the first buffer tank is not within a first preset range;
• the first controller can adjust the feeding rate of the limestone raw material by the first feeding machine based on the first sensing signal;
• the second controller can control the grinding speed of the grinding mill in response to the first sensing signal;
• the third controller can regulate the mixing speed of the mixing machine according to the first sensing signal;
• the fourth controller can modify the pumping speed of the first transfer pump for conveying the limestone slurry based on the first sensing signal;
• the lime milk preparation assembly comprises a lime kiln, a second conveyor, a third elevator, a lime storage bin, a second feeding machine, a nitrifying machine, a slag extractor, a third transfer pump, and a second buffer tank that are connected sequentially, the lime kiln is used for preparing quicklime, which is then conveyed to the second conveyor;
• the second feeding machine is equipped with a sixth controller, the nitrifying machine is equipped with a seventh controller, the third transfer pump is equipped with an eighth controller, and the second buffer tank is equipped with a ninth controller;
• the ninth controller is simultaneously connected to the sixth controller, the seventh controller, and the eighth controller;
• the ninth controller can send a second sensing signal when the weight of the lime milk in the second buffer tank is not within a second preset range, and transmit it to the sixth controller, the seventh controller, and the eighth controller simultaneously;
• the sixth controller can control the feeding rate of quicklime raw material from the second feeding machine based on the second sensing signal, the seventh controller can control the mixing rate of quicklime and water in the nitrifying machine based on the second sensing signal, and the eighth controller can control the transfer rate of lime milk by the third transfer pump based on the second sensing signal.