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Method for preparing inconel by using heavy metal sludge

A technology of inconel and heavy metal sludge, which is applied in the field of heavy metal sludge reuse, can solve the problems of no economic benefit, high cost of car manufacturing, secondary pollution, etc., achieve considerable economic benefits and avoid secondary pollution , The effect of saving resources and energy

Inactive Publication Date: 2015-05-20
FUJIAN NONNON RENEWABLE RESOURCES TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The object of this method is a single stainless steel pickling sludge, the cost of car manufacturing is high, and it does not have economic benefits; moreover, the smoke and dust generated during the preparation of the alloy will cause secondary pollution

Method used

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  • Method for preparing inconel by using heavy metal sludge
  • Method for preparing inconel by using heavy metal sludge
  • Method for preparing inconel by using heavy metal sludge

Examples

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Embodiment 1

[0020] Table 1 Composition and ratio of each raw material

[0021] (1) Mix stainless steel sludge 1, stainless steel sludge 2, electroplating sludge 1, electroplating sludge 2, chromium sludge, dust ash produced in the production process of Inconel, and laterite nickel ore according to the mass ratio and add them to the ball making Balls are made in the machine, and the mixed balls are preheated and dried in a drying kiln (300 ℃);

[0022] (2) Add coke and limestone to the dried mixture, and carry out reduction roasting in a rotary kiln (1000 ℃) to obtain calcined sand; the flue gas generated by the rotary kiln is preheated and recovered by the waste heat boiler, and after the purification treatment reaches the standard Emission, the collected dust is returned to the raw material warehouse as dust;

[0023] (3) Put the calcined sand into the submerged arc furnace (1600 ℃) for smelting, and cast the molten Inconel into ingots to obtain Inconel alloy; the smelting slag is u...

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Abstract

The invention belongs to the reutilization field of heavy metal sludge and particularly relates to a method for preparing inconel by using heavy metal sludge. The method comprises the following steps: mixing stainless steel sludge, electroplating sludge, chrome sludge and fly ash generated in the production process of inconel with laterite-nickel ore, predrying, carrying out reduction roasting and smelting to finally obtain inconel. In the whole production process, fly ash and smelting slag are both recyclable, thereby avoiding secondary pollution, saving resources and energy to the greatest extent, lowering the production cost and further achieving remarkable economic benefit.

Description

technical field [0001] The invention belongs to the field of reuse of heavy metal sludge, and in particular relates to a method for preparing Inconel alloy from heavy metal sludge. Background technique [0002] In the past ten years, my country's economy has developed rapidly and the urbanization process has accelerated. However, the extensive economic development model has caused a series of problems such as resource shortages and environmental pollution, which have seriously affected the sustainable development of economy and ecology. Therefore, it is of great practical significance to transform the linear logistics model of "economy-product-waste discharge" in traditional economic development into a material circulation model of "resource-product-renewable resources" so as to achieve sustainable development. [0003] Electroplating and stainless steel sludge contain Cu, Ni, Al, Cr and other heavy metal ions, with complex properties. Among them, Cr(VI) is the most toxic, ...

Claims

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Application Information

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IPC IPC(8): C22B4/06C22B1/248
Inventor 孙眉眉
Owner FUJIAN NONNON RENEWABLE RESOURCES TECH
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