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Heavy metal sludge recycling and comprehensive utilization method

A heavy metal sludge and recycling technology, applied in the direction of improving process efficiency, etc., can solve the problems of no economic benefit, high cost of car manufacturing, secondary pollution, etc., and achieve significant economic benefits, low cost, resource saving and energy effect

Inactive Publication Date: 2015-04-29
FUJIAN NONNON RENEWABLE RESOURCES TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Heavy metal sludge recycling and comprehensive utilization method
  • Heavy metal sludge recycling and comprehensive utilization method
  • Heavy metal sludge recycling and comprehensive utilization method

Examples

Experimental program
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Embodiment 1

[0020] surface 1 The composition and proportion of each raw material

[0021]

[0022] (1) Mix stainless steel sludge 1, stainless steel sludge 2, electroplating sludge 1, electroplating sludge 2, chromium sludge, dust removal ash and oxide scale produced in the production process of Inconel alloy according to the mass ratio and add them to the ball making machine Medium pelletizing, preheating and drying the mixed pellets in a drying kiln (200°C);

[0023] (2) Add coal, 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 a waste heat boiler, and purified Discharge after reaching the standard, and return the collected smoke and dust to the raw material warehouse as dust for dust removal;

[0024] (3) Put the calcined sand into the submerged arc furnace (1600 ℃) for smelting, and cast the molten Inconel into ingots to obtain...

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Abstract

The invention belongs to the field of reutilization of heavy metal sludge, and particularly relates to a heavy metal sludge recycling and comprehensive utilization method. The method comprises the following steps: mixing stainless steel sludge, electroplating sludge, chromium sludge, dedusting ash generated in the chromium-nickel-iron alloy production process, and additive scales, predrying, carrying out reduction roasting, smelting to obtain a chromium-nickel-iron alloy, and using the byproduct smelting slag in preparing the cement additive. The dedusting ash and smelting slag generated in the whole technical process can be recycled, and thus, the method does not generate secondary pollution, maximally saves the resources and energy, lowers the production cost, and has obvious economic benefits.

Description

technical field [0001] The invention belongs to the field of reutilization of heavy metal-related sludge, and in particular relates to a resource comprehensive utilization method of heavy metal-related 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 the...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B7/00C22B4/06
CPCC22B1/02C22B4/06C22B7/00Y02P10/20
Inventor 孙眉眉
Owner FUJIAN NONNON RENEWABLE RESOURCES TECH
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