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Acid washing iron red desilication filter cake treating device and treating method

A processing device and filter cake technology, which is applied in the field of pickling iron red desiliconization filter cake processing device, can solve the problems of underground water source pollution, high chlorine content, non-recycling, etc., and achieve low investment, simple operation and maintenance, and remarkable technology progressive effect

Active Publication Date: 2009-02-18
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The wet filter cake produced by the acid regeneration system is acidic due to its high chlorine content, so it cannot be recycled and used in sintering and pelletizing processes, and can only be transported to the slag yard for landfill treatment
This treatment method not only occupies land, but also acidifies the soil, and may also pollute groundwater sources

Method used

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  • Acid washing iron red desilication filter cake treating device and treating method
  • Acid washing iron red desilication filter cake treating device and treating method
  • Acid washing iron red desilication filter cake treating device and treating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1. The structure of the heating device.

[0048] Described heating device is roasting tower 3, is provided with burner 4, is made of roasting tower 3 inner chambers, is provided with the feeder 2 that provides bulk filter cake 1 in burner 4 in its top, in burner 4 Below, the gas air inlet pipe 5 is set to communicate with the burner 4, and below the gas air inlet pipe 5, the inside of the roasting tower 3 is an iron oxide powder collection chamber 6.

[0049] The roasting tower 3 is the main equipment of the pickling iron red desiliconization filter cake treatment device, which provides a high-temperature zone for thermal decomposition of the filter cake 1. The maximum temperature in the high-temperature zone reaches 7500C, and it burns in an oxidizing atmosphere, and heats and decomposes iron chlorides. Under oxygen conditions, iron oxides are obtained; chloride ions are hydrolyzed at high temperature to generate hydrogen chloride gas.

[0050] The iron oxi...

Embodiment 2

[0052] Embodiment two, recovery device structure.

[0053] The recovery device is provided with a buffer tower 7 and an absorption tower 8, wherein the buffer tower 7 is connected with the roasting tower 3 as a whole, and the passage inside the buffer tower 7 is a "U" shape connected to the bottom, and one of the "U" The upper end communicates with the burner 4, and the other upper end communicates with the lower part of the absorption tower 8 through a pipeline.

[0054] The mixed gas entering the buffer tower 7 from the roasting tower 3 enters the buffer tower 7 in a downstream manner, and the mixed iron oxide particles settle in the iron oxide particle sedimentation tank 13 at the bottom of the buffer tower 7, which has the function of dust removal and can be recovered. It has the function of purifying and cooling the mixed gas. Make the temperature of the mixed gas entering the absorption tower 8 no more than 110°C, and use silicon refractory material inside, which can re...

Embodiment 3

[0055] Embodiment 3, absorption tower structure.

[0056] A sprinkler 9 is arranged on the top of the absorption tower 8, and is connected with a water source of industrial pure water 10 through pipelines; an industrial hydrochloric acid recovery port 11 is arranged at the bottom thereof. The industrial hydrochloric acid recovery port 11 is connected with the acid tank of the strip pickling process, and the recovered industrial hydrochloric acid flows to the acid tank of the pickling process for recycling and reuse.

[0057] There are multiple sets of absorption towers 8, which are used in cascade. The industrial pure water 10 can also be used in countercurrent cascade to ensure the absorption effect. The absorption tower 8 is equipped with a perforated drain plate 12, and the inside of the tower is slightly negative pressure to improve the absorption effect. . The main tower body materials are polypropylene, polytetrafluoroethylene and enamel products. Currently, there are f...

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Abstract

The invention belongs to the technical field of the metallurgical industry and discloses a device for treating a pickling red ferric oxide desiliconized filter mass, which is used for carrying out harmless treatment to the pickling red ferric oxide desiliconized filter mass. The treatment device is characterized in that according to a process sequence, the device is provided with a heating device and a reclaiming device which are communicated with each other; the heating device heats and decomposes the pickling red ferric oxide desiliconized filter mass; and the reclaiming device respectively reclaims a solid material and a gas material decomposed and produced by the heating device. The invention also discloses a treatment method adopting the treatment device. With the technical proposal, the harmless treatment is carried out to the filter mass with certain toxicity and harmfulness; the full ferric content of an obtained solid is over 64 percent; the property of the solid is close to the property of concentrated iron powder; the solid can be returned to a sintering system for use and can be also used as a desiliconizing agent for the pretreatment of molten iron; the obtained industrial hydrochloric acid can be used for other applications; and the whole production process produces no waste liquid and no toxic gas. The device has small investment for process equipment, simple operation and maintenance and good economical benefit.

Description

technical field [0001] The invention belongs to the technical field of the metallurgical industry, and relates to the comprehensive utilization of solid waste in metallurgical enterprises and the field of environmental protection. More specifically, the invention relates to a treatment device for acid-washed iron red desiliconization filter cake. In addition, the invention also provides a processing method adopted by the device. Background technique [0002] In the production of metallurgical industry, the pickling sheet is generally treated by hydrochloric acid process, and the acid regeneration production line generally adopts the acid recovery system of Ruthner Company in Austria. The filter cake is produced during the desiliconization process in the acid regeneration process. The process principle is: in the ferrous chloride solution containing a small amount of free hydrochloric acid, air is introduced to oxidize part of the ferrous ions into ferric ions, and silicon fo...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 丁陈来陈广言张耀辉朱义文
Owner MAANSHAN IRON & STEEL CO LTD
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