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A system and method for recovering waste heat from copper slag and directly reducing and extracting iron

A technology for slag waste heat and copper recovery, which is applied to furnace types, furnaces, shaft furnaces, etc., to achieve the effects of reducing production costs, improving waste heat recovery rate, and eliminating the grinding process

Active Publication Date: 2018-05-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the problems existing in the existing technology, the present invention provides a system and method for recovering copper slag waste heat and directly reducing and extracting iron. Difficult utilization and high energy consumption technical problems

Method used

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  • A system and method for recovering waste heat from copper slag and directly reducing and extracting iron
  • A system and method for recovering waste heat from copper slag and directly reducing and extracting iron
  • A system and method for recovering waste heat from copper slag and directly reducing and extracting iron

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Embodiment 1

[0043] The structure of the system for recovering waste heat from copper slag and directly reducing and extracting iron in this embodiment is as follows: figure 1 As shown, it consists of slag granulation and waste heat recovery device, copper slag carbon-containing pellet preparation device and direct reduction device;

[0044] The slag granulation and waste heat recovery device described therein includes a slag granulation component and a waste heat recovery component, and the slag granulation component consists of a slag slag tank 1, a centrifugal granulation device 2, a blower 5 and a slag particle collection device 4 The slag particle collection device 4 is a funnel-shaped container with a wide top and a narrow bottom. The centrifugal granulation device 2 capable of high-speed rotation is arranged inside the slag particle collection device 4, and the slag slag tank 1 extends into the slag particle collection device from above. Inside the slag particle collection device 4,...

Embodiment 2

[0056] The structure of the system for recovering waste heat from copper slag and directly reducing and extracting iron in this embodiment is as follows: figure 2 As shown, it consists of slag granulation and waste heat recovery device, copper slag carbon-containing pellet preparation device and direct reduction device;

[0057] The slag granulation and waste heat recovery device described therein includes a slag granulation component and a waste heat recovery component, and the slag granulation component consists of a slag slag tank 1, a centrifugal granulation device 2, a blower 5 and a slag particle collection device 4 The slag particle collection device 4 is a funnel-shaped container with a wide top and a narrow bottom. The centrifugal granulation device 2 capable of high-speed rotation is arranged inside the slag particle collection device 4, and the slag slag tank 1 extends into the slag particle collection device from above. Inside the slag particle collection device 4...

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Abstract

The invention belongs to the technical field of non-ferrous metallurgy, and specifically relates to a system and method for recovering copper slag waste heat and directly reducing it to extract iron. The present invention directly prepares copper slag carbon-containing particles from granulated copper slag particles, eliminating the grinding process and reducing the energy consumption of the pelletizing process in the prior art; the copper slag dried in the drying furnace The increased compressive strength of carbon-containing pellets provides guarantee for direct reduction; the present invention improves the reduction rate of iron in copper slag by controlling the temperature of the reduction furnace; and improves the waste heat by recovering the waste heat of the flue gas in the furnace. The recovery rate reduces production costs, achieves the purpose of energy conservation and emission reduction, and solves the current difficult problems of copper slag waste heat recovery and iron recovery.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy, and in particular relates to a system and method for recovering waste heat of copper slag and directly reducing and extracting iron. Background technique [0002] Copper slag is a by-product discharged during the copper smelting process, the main components are fayalite and magnetite, and the temperature of the furnace can reach 1300 °C. According to relevant statistics, the copper slag produced in my country alone is as high as 15 million tons every year. The iron content in copper slag can reach 30% to 45%, which has a high waste heat recovery value and metal recovery value. The current treatment method for copper slag is rapid cooling by water quenching, and the cooled copper slag is stored as waste slag. This treatment method not only fails to recover the high-temperature waste heat of copper slag, but also wastes water resources, and the iron in copper slag cannot be recovere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/02C21B13/10C22B1/24C22B1/243C22B1/245
CPCC21B13/02C21B13/10C21B2200/00C22B1/24C22B1/2406C22B1/243C22B1/245
Inventor 于庆波左宗良王拓闫子文秦勤
Owner NORTHEASTERN UNIV LIAONING
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