Metallurgical chemical solid waste recycling system and method thereof

A solid waste, metallurgical chemical technology, applied in the field of metallurgical chemical solid waste resource utilization system, can solve the problem that the quality of nickel-chromium-iron alloy products cannot be guaranteed to meet relevant standards and customer requirements, the product does not meet the requirements of nickel-chromium-iron alloy products, and copper elements cannot be guaranteed. It has not been rationally utilized and other problems, and has achieved the effects of thorough harmless treatment, high degree of equipment mechanization and automation, and good economic and social benefits.

Active Publication Date: 2019-03-15
龙岩山青冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The recovery rate of metal elements is low, especially the recovery rate of nickel and copper is only 70%, which is a big waste of resources;
[0008] 2. Due to the mixed treatment of electroplating sludge (containing copper and nickel) and stainless steel sludge to produce nickel-chromium-iron alloy products, the copper element does not meet the requirements of nickel-chromium-iron alloy products after entering the alloy, and the copper element cannot be valued, resulting in no copper element. Reasonable utilization, low added value of the product;
[0009] 3. Because waste is different from ore, it generally contains high levels of harmful substances such as sulfur and phosphorus, especially electroplating sludge and stainless steel sludge after smelting in submerged arc furnaces. Carbon refining facilities, therefore, cannot guarantee the quality of the produced Inconel products to meet the relevant standards and customer requirements

Method used

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  • Metallurgical chemical solid waste recycling system and method thereof
  • Metallurgical chemical solid waste recycling system and method thereof
  • Metallurgical chemical solid waste recycling system and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 (pre-reduction equipment uses rotary kiln)

[0049] Resource utilization of stainless steel waste (nickel, chromium)

[0050] The chemical composition of stainless steel waste is shown in Table 1 below

[0051] Table 1 Chemical composition of stainless steel waste

[0052]

[0053] According to the chemical composition content of the waste in Table 1, in this embodiment, the specific formula and the calculation of the quantity of relevant metal elements (metal tons) are shown in the following table 2 with the amount of production and treatment waste as 10,000 tons on a dry basis:

[0054] Table 2 Calculation table of waste formula and metal element quantity

[0055]

[0056] The technical process and specific operation steps of this embodiment are shown in figure 2 shown.

[0057] in, figure 2 The auxiliary raw materials in the PLC batching shown in step 6 include slagging agent, secondary slag of returned iron (washed iron), etc., and the redu...

Embodiment 2

[0075] Resource utilization of electroplating sludge

[0076] The present embodiment electroplating sludge chemical composition and formula calculation are shown in the following table 4

[0077] Table 4 Calculation table of chemical composition and formula of electroplating sludge

[0078]

[0079] For the process steps of electroplating sludge resource utilization image 3 shown.

[0080] image 3 The intermediate pre-reduction equipment adopts a sintering machine, and in the process operation steps, except that the ball making operation in step 4 is not required, the rest of the operations are the same as in Example 1.

[0081] For nickel-copper alloy products, if other element components need to be refined according to the customer's requirements, the relevant refining operation of step 8 can be continued.

[0082] The present embodiment nickel-copper alloy chemical composition analysis and metal element recovery calculation are shown in table 5 below

[0083] Tabl...

Embodiment 3

[0093] Resource utilization of nickel-containing waste

[0094] The nickel-containing waste described in this embodiment mainly refers to the nickel-containing waste catalyst in the production process of petrochemical industry and other industries, and its chemical composition and formula calculation are shown in Table 6 below

[0095] Table 6 Chemical composition and formula calculation table of spent nickel-containing catalyst

[0096]

[0097] The pre-reduction equipment of this embodiment is produced using a shaft kiln;

[0098] The process steps of this embodiment are shown in Figure 4 shown.

[0099] The operation of step 1 to step 8 in the illustration in this embodiment is the same as that of embodiment 1, and the refining in step 9 is to carry out dephosphorization and decarburization refining in the modulation electric furnace and AOD respectively, to prepare low-carbon, low-phosphorus high-quality nickel-iron alloy products .

[0100] The present embodiment ...

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Abstract

The invention discloses a metallurgical chemical solid waste recycling system and a method thereof. The metallurgical chemical solid waste recycling system comprises a drier, a separator, a proportioning machine, a mixer, a ball forming machine, pre-reduction equipment, a recycling electric furnace, a modulating electric furnace and an AOD refining furnace. The metallurgical chemical solid waste recycling system disclosed by the invention has the main beneficial effects that (1) the recycling electric furnace can recycle gas; materials are thermally charged into the furnace; molten iron is thermally mixed and refined; the equipment is high in mechanization degree and automation degree; the wastes are subjected to complete harmless treatment; the yield of each machine is high; the comprehensive energy consumption of production is low; and the metallurgical chemical solid waste recycling system is suitable for industrial production; (2) the produced products are alloy materials containing metal elements such as nickel, chromium and copper; the product quality can be regulated and controlled according to relevant standards and the customer requirements; high-quality products with different specifications can be produced; the products are widely applied; and the additional value is high; and (3) the recycle rate of the valuable metal elements in the wastes is high; resources are fully utilized; and good economical benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of environmental engineering treatment and comprehensive utilization of resources, and in particular relates to metallurgical and chemical solid wastes containing nickel, copper, chromium, zinc and other valuable metal element wastes produced in the production process of stainless steel production enterprises and electroplating, chemical and other industries Resource utilization system and method thereof. Background technique [0002] The environment is the basis for the survival of human society. In the past 10 years, with the development of resources, my country's economy has developed rapidly. At the same time, the natural environment has also been greatly damaged, especially the pollution of the environment by industrial solid waste Seriously restrict the sustainable development of the economy. [0003] In recent years, the state has put forward the goals of harmlessness, reduction, and recycling of industrial sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/16C22B4/06
CPCC22B1/16C22B4/06C22B7/001Y02P10/20
Inventor 李大伦李鑫陈默李倞
Owner 龙岩山青冶金科技有限公司
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