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Laterite Roasting System

A laterite ore roasting technology, applied in the field of metallurgical industry, can solve the problems of large slag discharge, large chemical consumption, and long process

Active Publication Date: 2016-08-17
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes generally have the characteristics of long process, large consumption of chemicals, low degree of resource utilization, and large discharge of slag.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Ore composition: Ni0.8%, Fe40%, SiO 2 8%, Al 2 o 3 2%, MgO1.2%, Cu0.5%, Co0.2%, H 2 O40% burns 6.5%.

[0067] Excipients: sulfur, flotation agents.

[0068]Process: The ore is dried at 200°C to remove 35% of free water, and then the dry ore is crushed to 0.5-3 mm in size, and the ore is added to the fluidized bed by a feeder. Carry out reduction sulfidation roasting at 850°C, fill the fluidized bed with reducing gas at a pressure of 6MPa, and set a sulfur steam injection device in the fluidized bed (the filling pressure of sulfur steam is 6MPa), and the roasted product goes through Cool to room temperature under a reducing atmosphere with gas as protective gas.

[0069] The cooled roasted product is crushed (so that the ore particles below 200 mesh account for 90%), and then the crushed roasted product is subjected to the first magnetic separation treatment by wet magnetic separation at a magnetic separation intensity of 0.1T to obtain iron The yields of the conce...

Embodiment 2

[0071] Ore: Ni0.8%, Fe40%, SiO 2 8%, Al 2 o 3 2%, MgO1.2%, Cu0.5%, Co0.2%, H 2 O40% Burnout 6.5%

[0072] Auxiliary materials: pulverized coal, sulfur, flotation agent

[0073] Process: Dry the ore at a temperature of 200°C to remove 35% of free water, then crush the dry ore into particles with a particle size of 0.5-3mm, and mix the ore particles and reduced coal in a weight ratio of 1: After mixing at a ratio of 0.3, feed it into the rotary kiln by a feeder and carry out reduction vulcanization roasting at a temperature of 850 ° C. A sulfur steam injection device is installed in the discharge section of the rotary kiln (the filling pressure of sulfur steam is 2 MPa), and the roasted product is passed through the following steps: Coal gas is cooled to room temperature under a reducing atmosphere with protective gas.

[0074] The cooled roasted product is crushed (so that the ore particles below 200 mesh account for 90%), and then the crushed roasted product is subjected ...

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Abstract

The invention discloses a laterite ore roasting system. The roasting system comprises a roasting device and a first magnetic separation device, wherein the roasting device is adapted to mix the laterite ore with a reducing agent and a vulcanizing agent therein and carry out a roasting treatment to obtain a roasted product, and the first magnetic separation device is connected to the roasting device and adapted to carry out first magnetic separation on the roasted product so as to obtain iron ore concentrate and first tailings respectively. The laterite ore roasting system according to an embodiment of the invention can effectively separate the laterite ore to obtain the iron ore concentrate.

Description

technical field [0001] The invention belongs to the field of metallurgical industry, in particular, the invention relates to a laterite ore roasting system. Background technique [0002] At present, the smelting process of limonite-type laterite ore is mainly high-pressure acid leaching or ammonia leaching process. These processes generally have the characteristics of long process, large consumption of chemicals, low degree of resource utilization, and large discharge of slag. Especially for limonite-type laterite ores containing polymetallics, it is particularly important to effectively or even efficiently separate and recover various valuable metals and realize the utilization of iron minerals. [0003] Therefore, the existing roasting separation technology needs to be further studied. Contents of the invention [0004] The present invention aims at solving one of the above technical problems at least to a certain extent or at least providing a useful commercial choice...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/10C22B1/02B03C1/00B03D1/00
Inventor 马明生何荣权孙海阔
Owner CHINA ENFI ENGINEERING CORPORATION