Preparation method for wet copper slag formed pellets

A technology of pelletizing and copper slag, which is applied in the field of preparation of wet copper slag forming pellets, can solve problems such as environmental pollution and waste of resources, and achieve the effects of simple industrial operation, low production cost, and low energy consumption cost

Pending Publication Date: 2017-04-26
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A large amount of waste slag is produced during the copper smelting process. After the copper slag is flotation, the copper is effectively recovered, but there are still a lot of iron resources in the copper slag. If it is discarded, it will cause waste of resources and pollute the environment.

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  • Preparation method for wet copper slag formed pellets

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preparation example Construction

[0029] The invention provides a method for preparing wet copper molding pellets. The method comprises the following steps: taking copper slag powder as a benchmark, and by mass percentage, copper slag powder, carbon raw material, and limestone in a mass ratio of 100: (20 ~25): (16~20) are mixed to obtain a mixed material; a composite binder is added to the obtained mixed material, and the composite binder and copper slag powder are carried out according to the mass ratio of (2~6):100 Mix and mix evenly to obtain a composite material, put the obtained composite material into a disc pelletizer for pelletizing to obtain wet pellets, dry or dry the obtained wet pellets to obtain dry pellets group.

[0030] In the above method, the carbon raw material adopts coal powder or blue charcoal powder.

[0031] In the above method, the content of total iron (TFe) in the copper slag powder is 35%-45%, and the carbon content in the carbon raw material is 65%-85%.

[0032] In the above meth...

Embodiment 1

[0045] Preparation of composite binder:

[0046] In this embodiment, the composite binder includes raw materials according to the following mass percentage proportioning:

[0047] Sodium humate 80%, pregelatinized starch 20%;

[0048] Weigh 32g of sodium humate and 8g of pregelatinized starch, put them into a mixer and stir to obtain a composite binder.

[0049] The method for preparing wet copper slag molding pellets by using the above-mentioned composite binder is as follows:

[0050] Mix 1000g of copper slag powder with a total iron content of 35% and a moisture content of 10.5%, 250g of coal powder with a carbon content of 65% and a moisture content of 8%, and 160g of limestone with a moisture content of 1.8%, and stir for 10 minutes to obtain a mixed material . The obtained mixed material was further mixed with 40 g of the composite binder prepared above, and stirred for 5 minutes to obtain a composite material. Put the obtained composite material into a disc pelletiz...

Embodiment 2

[0053] Preparation of composite binder:

[0054] In this embodiment, the composite binder includes raw materials according to the following mass percentage proportioning:

[0055] Sodium humate 20%, bentonite 80%;

[0056] Take by weighing 12g of sodium humate and 48g of bentonite, put them into a mixer and stir and mix to obtain a composite binder.

[0057] The method for preparing wet copper slag molding pellets by using the above-mentioned composite binder is as follows:

[0058] Mix 1000g of copper slag powder with a total iron content of 40% and a moisture content of 10%, 210g of blue charcoal powder with a carbon content of 70% and a moisture content of 9.5%, and 170g of limestone with a moisture content of 1.5%, and stir for 8 minutes to obtain a mixture material. The obtained mixed material was further mixed with 60 g of the composite binder prepared above, and stirred for 10 minutes to obtain a composite material. Put the obtained composite material into a disc pe...

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Abstract

The invention relates to a preparation method for wet copper slag formed pellets. The method comprises the steps that copper slag powder, carbon raw materials and limestone are mixed according to a mass ratio and stirring evenly to obtain a mixed material; a composite binder is added into the obtained mixed material for further mixing, and a composite material is obtained through even stirring; the obtained composite material is placed in a disc pelletizer for pelletizing, and wet pellets are obtained; and the obtained wet pellets are dried or aired, and the dry pellets are obtained. The composite binder is mainly composed of a low-priced organic binder, the adding amount is small, the low production cost is ensured, the ash content after roasting is relatively low, and impurities are not introduced excessively. A humate binder is used as a viscous colloidal substance and has the high viscidity and a certain carbon content, so that copper slag reduction is facilitated. The method is simple in industrial operation and low in energy consumption cost and facilitates industrial production.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of solid waste renewable resources, in particular to a pretreatment method for recovering copper, iron, lead, and zinc from waste copper slag, and more specifically, to a preparation of wet copper slag forming pellets method. Background technique [0002] A large amount of waste slag is produced during the copper smelting process. After the copper slag is flotation, the copper is effectively recovered, but there is still a large amount of iron resources in the copper slag. If it is discarded, it will cause waste of resources and pollute the environment. Efficient recovery of iron in copper slag is of great significance to alleviate the shortage of copper and iron resources in my country and eliminate the hidden danger of secondary pollution of heavy metals caused by copper slag storage yards. [0003] According to the characteristics of copper slag, the process of direct reducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/248C22B1/245C22B7/00
CPCC22B1/245C22B1/248C22B7/001Y02P10/20
Inventor 邓鑫曾刚夏碧华高建曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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