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Method for preparing stainless steel production raw material sintered ore by using nickel slag

A technology of sintered ore and stainless steel, applied in the field of metallurgy, can solve the problems of not conforming to the circular economy, accumulating polluted environment, low utilization rate of nickel slag, etc.

Inactive Publication Date: 2019-01-15
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the existing nickel slag has low utilization rate, the important components in it are not fully utilized, the accumulation pollutes the environment, and does not conform to the circular economy, a method for preparing sintered ore of stainless steel raw material by using nickel slag and the stainless steel produced by it are provided. raw material sinter

Method used

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  • Method for preparing stainless steel production raw material sintered ore by using nickel slag
  • Method for preparing stainless steel production raw material sintered ore by using nickel slag
  • Method for preparing stainless steel production raw material sintered ore by using nickel slag

Examples

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Effect test

Embodiment 1

[0049] After the corncobs are broken, they are sieved, and corncobs of 3 mm to 8 mm are taken as raw materials for batching. Weigh 35.0kg of hematite powder, 26.0kg of magnetite fine powder, 15.5kg of nickel slag, 10.0kg of returned ore, 3.0kg of limestone, 4.5kg of limestone, 3.0kg of coke powder, and 3.5kg of corn cob. Pan or electronic scale for batching. The raw materials after batching are transported to the mixing barrel by a belt, and then mixed with water until the water content is 7.8%. The mixed material is sent to the cylinder granulator for granulation, and the sintered mixed material is obtained, and the average particle size is 3mm~ 6mm sintered mixture for later use. The sintered mixture after granulation is brought into the mine tank, and the thickness of the material layer is adjusted to 550mm for distribution. Ignite with coal gas and sinter on a sintering machine, where the ignition temperature is 1080°C to obtain sintered ore. The sintered sintered ore i...

Embodiment 2

[0052] After the corncobs are broken, they are sieved, and corncobs of 3 mm to 8 mm are taken as raw materials for batching. Weigh 33.0kg of hematite powder, 24.0kg of magnetite fine powder, 20.0kg of nickel slag, 10.0kg of returned ore, 2.5kg of limestone, 4.0kg of limestone, 3.0kg of coke powder, and 4.0kg of corn cob. Pan or electronic scale for batching. The raw materials after batching are transported to the mixing barrel by a belt, and then mixed with water until the water content is 7.8%. The mixed material is sent to the cylinder granulator for granulation, and the sintered mixed material is obtained, and the average particle size is 3mm~ 6mm sintered mixture for later use. The sintered mixture after granulation is brought into the mine tank, and the thickness of the material layer is adjusted to 500mm for distribution. Ignite with coal gas and sinter on a sintering machine, where the ignition temperature is 1100°C to obtain sintered ore. The sintered sintered ore i...

Embodiment 3

[0055] After the corncobs are broken, they are sieved, and corncobs of 3 mm to 8 mm are taken as raw materials for batching. Weigh 20.0kg of hematite powder, 20.0kg of magnetite fine powder, 10.0kg of nickel slag, 8.0kg of returned ore, 2.0kg of limestone, 3.0kg of limestone, 3.0kg of coke powder, and 3.0kg of corn cob, using a batching circle Pan or electronic scale for batching. The raw materials after batching are transported to the mixing barrel by a belt, and then mixed with water until the water content is 7.6%. The mixed material is sent to the cylinder granulator for granulation, and the sintered mixed material is obtained, and the average particle size is 3mm~ 6mm sintered mixture for later use. The sintered mixture after granulation is brought into the mine tank, and the thickness of the material layer is adjusted to 450mm for distribution. Use coal gas to ignite and sinter on a sintering machine, where the ignition temperature is 1050°C to obtain sintered ore. Th...

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Abstract

The invention discloses a method for preparing a stainless steel production raw material--sintered ore--by using nickel slag. The method comprises the following steps: batching; mixing and granulation; material distribution; sintering; cooling; sieving; etc. Raw materials used in the step of batching are composed of, by weight, 20 parts to 45 parts of magnetite powder, 20 parts to 40 parts of hematite powder, 10 parts to 30 parts of nickel slag, 2 parts to 4 parts of limestone, 3 parts to 5 parts of lime, 2 parts to 4 parts of coke powder, and 3 parts to 4 parts of corn cob pieces. According to the method, the nickel slag is used as a raw material for preparing the stainless steel production raw material--sintered ore, so the utilization rate of the nickel slag can be improved; the nickelslag is fully utilized and turned from the waste into the valuable; environmental problems caused by stacking of the nickel slag are avoided; the cost of the sintered ore used as the stainless steel production raw material is lowered; and the reuse of the nickel slag meets the requirements of circular economy.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing stainless steel raw material sintered ore by using nickel slag and the prepared stainless steel raw material sintered ore. Background technique [0002] According to my country's existing nickel production process, about 6 to 16 tons of nickel slag will be discharged for every ton of nickel produced. Jinchuan Group alone will discharge nearly 800,000 tons of nickel slag every year, while the annual utilization is only 100,000 tons, and the remaining 700,000 tons Tons will be stockpiled, and the current stockpiling capacity has exceeded 10 million tons. According to the survey, the domestic stockpiled nickel slag has reached more than 40 million tons, and about 2 million tons will be added every year. Due to long-term unreasonable use of unused nickel slag, it not only occupies space and causes environmental pollution, but also the valuable components in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/24
CPCC22B1/16C22B1/24
Inventor 贺淑珍史永林李昊堃蔡湄夏张华
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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