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Method and device for preparing nickel iron roasted ore by utilizing lateritic nickel ore

A laterite nickel ore and roasting technology, which is applied in the field of preparing ferronickel roasted ore, can solve the problems of immaturity of low-Ni ferronickel, and achieve the effects of saving energy, reducing production costs, and reducing residence time

Active Publication Date: 2015-03-18
WUHAN BUILDING MATERIAL IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This method is limited by the country to 400m 3 The following small blast furnaces are used, so the use of large-capacity blast furnaces to smelt low-Ni ferronickel is still immature

Method used

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  • Method and device for preparing nickel iron roasted ore by utilizing lateritic nickel ore

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Embodiment 1

[0035] Embodiment 1: as figure 1 Shown, the present invention provides a kind of method utilizing laterite nickel ore to prepare ferronickel roasted ore, comprises the following steps:

[0036] (1) Grinding: finely grind the laterite nickel ore to make ore powder and send it to the bucket elevator 01 after metering. The particle fineness is between 0.075mm~1.0mm. The water content is less than 3wt%.

[0037](2) Preheating reduction: The material first enters the bucket elevator 01, and then enters the air chute 02 through the feeding chute (the chute fan 03 supplies air to the air chute 02 through the air supply duct, and passes through the air chute 02 The air distribution plate sends the material out), and then transports it to the double-barreled primary cyclone preheater 06, secondary cyclone preheater 07, and tertiary cyclone preheater 06, secondary cyclone preheater 07, and tertiary cyclone preheater in the pre-reduction system In the preheater 08, the four-stage cyclo...

Embodiment 2

[0041] Embodiment 2: as figure 1 As shown, the present invention also provides a device for preparing nickel-iron roasted ore by using laterite nickel ore, including a bucket elevator 01, an air chute 02, a chute fan 03, a rotary feeder 04, a gate valve 05, a rotary Kiln 12, water-cooled mixing tank 13, burner 14, hot air mixing chamber 15, high-temperature fan 16, cyclone dust collector 17, bag filter 18, chain conveyor 19, burner 20; the bucket elevator 01 The chute fan 03 is connected to the air chute 02 through the feeding chute, the air chute 02 is connected to the rotary feeder 04 through the feeder chute, and the rotary feeder 04 passes through the The feeder is connected to the gate valve 05, the rotary kiln 12 is fixed on a frame through the sealing device and the water-cooled mixing tank 13, the burner 14 is extended into the rotary kiln 12 through the hanger, and the hot air mixing chamber 15 is fixed on the frame Inside, the burner 20 is directly fixed on the hot ...

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Abstract

The invention discloses a method and a device for preparing a nickel iron roasted ore by utilizing a lateritic nickel ore. The method comprises the following steps: firstly, grinding the lateritic nickel ore into an ore powder, then carrying out high-temperature roasting of the obtained ore powder, during the high-temperature roasting process, allowing the ore powder to be in a pre-reduction system and carry out a high-temperature preheating reduction reaction, followed by allowing the high-temperature roasted ore to go into a rotary kiln for high-temperature calcination, thus obtaining a roasted ore containing nickel pig iron after completing high-temperature calcination, and then after dipping the roasted ore into water for cooling, separating to obtain the nickel iron roasted ore. The device comprises a hopper-type elevator, an air chute, a chute draught fan, a rotary feeder, a sluice valve, a rotary kiln, a water-cooling stirring tank, a burner, a hot wind mixing chamber, a high-temperature draught fan, a cyclone dust remover, a bag-type dust remover, a chain-type conveyor, a burner and a pre-reduction system. The preparation method and the device allow the heat transfer area of the ore powder to be large, enable each particle to be uniformly and fully subjected to a chemical reaction, have short reaction time, and have high utilization rate of the lateritic nickel ore.

Description

technical field [0001] The invention relates to a method and a device for preparing ferronickel roasted ore, in particular to a method and a device for preparing ferronickel roasted ore by using laterite nickel ore. Background technique [0002] The roasted ore of nickel-iron eutectic phase is an important intermediate product for selecting nickel ore. The high-grade nickel concentrate obtained after magnetic separation of ferronickel roasted ore is the raw material for manufacturing important nickel-containing products such as stainless steel. [0003] There are two traditional production methods for preparing ferronickel products: [0004] (1) Rotary kiln direct reduction method: nickel ore→drying→crushing→mixing coke and flux to make pellets→preheating→rotary kiln dehydration and reduction→solid molten slag-iron mixture→water quenching→grinding→jigging , strong magnetic separation and other multi-stage slag-iron separation → fine-grained ferronickel → electric furnace r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02
Inventor 刘婷婷姚元君杨顺德邓胜天苏林强盛红亮
Owner WUHAN BUILDING MATERIAL IND DESIGN & RES INST
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