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Process and apparatus for dry suspension sintering flash smelting of ferronickel

A dry and flash technology, applied in the direction of improving process efficiency, can solve problems such as high energy consumption and high pollution, and achieve the effects of reducing pollutant emissions, low investment cost, and short investment payback period

Pending Publication Date: 2018-07-03
徐州贝克福尔节能环保技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low energy consumption, environment-friendly dry suspension sintering flash smelting process and equipment for ferronickel to solve the problems of high energy consumption and high pollution commonly existing in the existing smelting process

Method used

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  • Process and apparatus for dry suspension sintering flash smelting of ferronickel
  • Process and apparatus for dry suspension sintering flash smelting of ferronickel
  • Process and apparatus for dry suspension sintering flash smelting of ferronickel

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Embodiment 1

[0056] Embodiment 1: the present invention is a kind of dry-process suspension sintering flash smelting ferronickel technology, and its specific implementation is as follows:

[0057] The laterite nickel ore used in this example comes from Indonesia, containing more than 1.8% nickel, 14% total iron, and about 30-35% moisture (inner water and outer water).

[0058] A dry-process suspension sintering flash smelting process for ferronickel, its process flow chart is as follows figure 1 shown, including the following steps:

[0059] Step 1, drying: Take the laterite nickel ore, send the crushed laterite nickel ore to a hot air dryer for dehydration, and then enter the laterite nickel ore storage after drying. Among them: the moisture (external water) content of the material after drying is about 6%, (see figure 2 ).

[0060] Step 2, Grinding: The material is taken out from the laterite nickel ore storage and enters the pulverizer, and after being ground into powder, it is tran...

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Abstract

The invention relates to a process and apparatus for dry suspension sintering flash smelting of ferronickel, belonging to the field of ferronickel production processes and apparatuses. The process comprises the following steps: 1) drying; 2) grinding; 3) multi-stage suspension pre-reduction; 4) sintering reduction; and 5) flash furnace smelting. Flue gas with waste heat from flash furnace successively enters a sintering furnace and a multi-stage suspension pre-reduction system; the heat and a reducing agent in the flue gas act on the links of pre-reduction and sintering reduction, so the wasteheat is utilized, and energy consumption is reduced; and mineral materials in the flue gas settle down in a preheating system and then return to a melting system, so productivity is enhanced and theemissions of pollutants are lowered. Material flow in the whole system operates in a closed loop, and exhaust gas is purified and then discharged after reaching the standard. The apparatus comprises adrying device, a grinding device and a dry suspension sintering device, wherein the drying device, the grinding device and the dry suspension sintering device are sequentially connected. The processand apparatus of the invention has the advantages of low investment cost, obvious energy saving effect, no consumption of electricity and coke, greatly-reduced power consumption, substantially-loweredcost for reducing agents, full utilization of exhaust gas and waste heat and high automation degree.

Description

technical field [0001] The invention relates to a ferronickel production process and equipment, in particular to a dry suspension sintering flash smelting ferronickel production process and equipment. Background technique [0002] With the development of my country's economy and the improvement of people's living standards, the production and consumption of stainless steel have grown rapidly. Chromium-nickel stainless steel is the main stainless steel species that consumes nickel. Due to its excellent comprehensive performance, it has been widely used, accounting for 60-75% of the total output of stainless steel. In recent years, my country's nickel consumption has grown rapidly, but nickel production has not kept up with the pace of consumption growth, making metal nickel still dependent on imports, resulting in high international nickel and chromium prices and tight supply of nickel raw materials. This poses a potential threat to the development of my country's national e...

Claims

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Application Information

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IPC IPC(8): C22B23/02C22B1/16C22C35/00
CPCC22B1/16C22B23/005C22B23/02C22C35/00Y02P10/20
Inventor 张宏建刘刚王兆平王士军李梦
Owner 徐州贝克福尔节能环保技术有限公司
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