Method for removing harmful components in iron-containing solid waste

A technology of solid waste and solid components, applied in the direction of improving process efficiency, etc., can solve problems such as corrosion equipment, high content of harmful components, affecting roasting reduction process and product quality, etc., to improve iron grade and low processing cost , The effect of simple process

Pending Publication Date: 2020-07-10
舒新前
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of harmful components such as sodium and chlorine in some iron-containing solid wastes, it not only affects the roasting reduction process and product quality, but also causes problems such as corrosion of equipment during the roasting reduction process

Method used

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  • Method for removing harmful components in iron-containing solid waste
  • Method for removing harmful components in iron-containing solid waste
  • Method for removing harmful components in iron-containing solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) using a solar greenhouse to dry the pickling sludge to a moisture content of 14.15%, and crushing the obtained dry pickling sludge to a particle size of 35 mesh to obtain dry pickling sludge particles;

[0045] (2) Add 10 g of the dried pickling sludge granules into the immersion bottle, add 90 mL of tap water, place the immersion bottle in an overturning oscillator, and oscillate at room temperature with an oscillation frequency of 35 times / min Dipping and washing for 60 minutes, vacuum filtration after shaking, the filter membrane is a microfiltration membrane, and liquid components and solid components are obtained;

[0046] (3) Using tap water to wash the solid component 5 times, the volume of the water added each time is 90mL, to obtain the washing liquid and the solid material;

[0047] (4) press-filtering the solid material to obtain a filter cake and filtrate, drying the gained filter cake to a water content<5%, and the gained solid component is pickling slu...

Embodiment 2

[0050] Remove chlorine and sodium harmful components according to the method of embodiment 1, the difference with embodiment 1 is that soaking agent is hydrochloric acid solution (90mL, 0.8wt%).

Embodiment 3

[0052] Remove chlorine and sodium harmful components according to the method of embodiment 1, the difference with embodiment 1 is that soaking agent is acetic acid solution (90mL, 1.2wt%).

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Abstract

The invention provides a method for removing harmful components in iron-containing solid waste, and belongs to the technical field of solid waste treatment. The method for removing the harmful components in the iron-containing solid waste comprises the following steps: drying the iron-containing solid waste to obtain dried solid waste; and leaching the dried solid waste by using a leaching solution, and then carrying out solid-liquid separation, wherein an obtained solid component is the solid waste from which the harmful components are removed, and the leaching solution comprises water, acidliquor or alkali liquor. According to the method, water, acid liquor or alkali liquor is used for leaching, so that the content of harmful components of sodium and chlorine in the solid waste can be reduced to a lower level, the iron grade is improved, the pretreated solid waste can be subjected to roasting, reduction and iron recycling, and part of the pretreated solid waste can also be directlyused as fine iron powder. Moreover, the method provided by the invention is simple and convenient in process and low in treatment cost, and the leaching agent can be recycled without secondary pollution.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for removing harmful components in iron-containing solid waste. Background technique [0002] At present, the treatment technologies of iron-containing solid waste mainly include landfill storage, solidification and stabilization, and resource recycling. Stockpiling and landfilling not only occupies a large amount of land, but may also pollute surface and groundwater. Landfill disposal is increasingly restricted, and resource utilization is becoming more and more urgent. The recovery and resource utilization of metals in iron-containing solid waste has undoubtedly become an inevitable choice for solid waste treatment. Resource utilization is mainly to mix iron-containing solid waste with clay and other components to prepare building materials such as ceramsite and sintered bricks, which is suitable for solid waste with low heavy metal content and weak acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00
CPCC22B1/005C22B7/006C22B7/007C22B7/008Y02P10/20
Inventor 舒新前
Owner 舒新前
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