阅读说明：本技术 一种不锈钢酸洗残渣的回收工艺 (Recovery process of stainless steel pickling residues ) 是由 阴通明 于 2020-07-31 设计创作，主要内容包括：一种不锈钢酸洗残渣的回收工艺,包括以下步骤：A、通过酸洗槽将加工完成的不锈钢进行酸洗,在酸洗结束后将不锈钢取出；B、将取出的不锈钢运输至刷洗区进行清洁处理,然后将刷洗区的污水导入至烘干区；C、通过烘干装置将污水进行烘干处理并在烘干结束后将不锈钢残渣运输至筛选区；D、通过磁性吸附装置对不锈钢残渣进行磁性筛选,获取被磁性吸附的不锈钢金属残渣；E、将磁性筛选后剩余的不锈钢非金属残渣导入至第一熔炉进行熔炼分解,控制电磁吸附装置解除不锈钢金属残渣的磁性吸附,并将不锈钢金属残渣导入至第二熔炉进行熔炼回收。(A recovery process of stainless steel pickling residues comprises the following steps: A. pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished; B. conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area; C. drying the sewage by a drying device, and transporting the stainless steel residues to a screening area after drying; D. magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues; E. and (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.)

1. The recovery process of the stainless steel pickling residues is characterized by comprising the following steps:

A. pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished;

B. conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area;

C. drying the sewage by a drying device, and transporting the stainless steel residues to a screening area after drying;

D. magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues;

E. and (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.

2. The process for recovering stainless steel pickling residues as claimed in claim 1, wherein the process further comprises the steps of:

F. starting a circulating filter device in the pickling tank by controlling to circularly filter the pickling solution in the pickling tank to obtain filtered pickling solution residues;

G. conveying the filtered pickling solution residues to a drying area, drying the filtered pickling solution residues through a drying device, and conveying the pickling solution residues to a vibration crushing area after drying is completed;

H. carrying out vibration crushing on the dried pickle residue through a vibration crushing device, and guiding the pickle residue into a screening area after the vibration crushing is finished;

I. magnetically screening the pickling solution residues through a magnetic adsorption device to obtain magnetically adsorbed pickling solution metal residues;

J. and guiding the residual pickling solution non-metal residues after magnetic screening into a first smelting furnace for smelting and decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the pickling solution metal residues, and guiding the pickling solution metal residues into a second smelting furnace for smelting and recovery.

3. The process of claim 1, wherein the step of transporting the stainless steel to a scrubbing section for cleaning comprises: shot blasting is carried out on the stainless steel through a freezing trimmer; and carrying out ultrasonic cleaning on the stainless steel through an ultrasonic cleaning tank.

4. The process for recovering stainless steel pickling residues as claimed in claim 1, wherein the process further comprises: and transporting the stainless steel subjected to the cleaning treatment to a finished product placing area.

5. The process for recovering stainless steel pickling residues as claimed in claim 1, wherein the process further comprises: guiding the residual liquid after the circular filtration in the pickling tank to an inspection area;

and (4) carrying out discharge standard inspection on the residual liquid after the circular filtration through a wastewater discharge standard inspection device, discharging the residual liquid when the residual liquid is qualified, and otherwise, refluxing the residual liquid into the pickling tank for continuous circular filtration.

Technical Field

The invention relates to the technical field of stainless steel, in particular to a recovery process of stainless steel pickling residues.

Background

The stainless steel has black and yellow scale during processing, and the processed stainless steel needs to be subjected to pickling passivation treatment in order to improve the appearance and corrosion resistance of the stainless steel. The oxide skin generated after welding and high-temperature processing is removed, so that the oxide skin is silvery and bright, and a layer of oxide film taking chromium as a main substance is formed on the surface after processing, secondary oxygen corrosion is not generated, and the passivation purpose is achieved, so that the surface corrosion resistance quality of the stainless steel product is improved, and the service life of equipment is prolonged.

The stainless steel pickling is generally carried out by adopting pickling passivation paste and pickling passivation solution, the pickling passivation paste synchronously carries out pickling and passivation and is completed in one step, the traditional pickling and passivation process is changed, and the method is simple to operate, convenient to construct and low in cost. Is suitable for large-area painting operation. The pickling passivation solution is suitable for soaking operation of small workpieces.

The conventional chemical precipitation method is adopted in the common treatment process of the pickling wastewater, and lime is used as a neutralizing agent to treat the wastewater. The method has the advantage that pollutants in the sewage can be well removed through the physical and chemical properties of the lime. However, since such waste water contains a relatively high fluoride content and in many cases contains sulfuric acid and sulfate, there are major problems in that a large amount of sludge such as calcium fluoride and precipitation of hydrated calcium sulfate are generated, and at the same time, the interstitial water content of calcium sulfate crystals is high, further increasing the amount of sludge. The production amount of the sludge is greatly increased, the grade of heavy metal nickel and the like is inevitably low, most of the nickel and the like can not be recycled, and the resource waste is caused. And the sludge containing metals such as nickel, chromium and the like belongs to dangerous waste, so that the environment is seriously polluted, and huge environmental protection expenditure is brought to enterprises due to higher disposal cost.

In addition, the current common method is anti-seepage landfill treatment aiming at the heavy metal contained in the stainless steel pickling paste for pickling, but the passive treatment mode does not fundamentally solve the problem, still has the hidden trouble of environmental pollution, and simultaneously needs to occupy land resources for landfill.

Therefore, the prior art lacks a technical means for effectively recycling and treating the sewage after stainless steel pickling or cleaning.

Disclosure of Invention

The purpose of the invention is as follows:

in order to overcome the defects in the background art, the embodiment of the invention provides a recovery process of stainless steel pickling residues, which can effectively solve the problems related to the background art.

The technical scheme is as follows:

a recovery process of stainless steel pickling residues comprises the following steps:

A. pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished;

B. conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area;

C. drying the sewage by a drying device, and transporting the stainless steel residues to a screening area after drying;

D. magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues;

E. and (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.

As a preferred mode of the invention, the process further comprises the steps of:

F. starting a circulating filter device in the pickling tank by controlling to circularly filter the pickling solution in the pickling tank to obtain filtered pickling solution residues;

G. conveying the filtered pickling solution residues to a drying area, drying the filtered pickling solution residues through a drying device, and conveying the pickling solution residues to a vibration crushing area after drying is completed;

H. carrying out vibration crushing on the dried pickle residue through a vibration crushing device, and guiding the pickle residue into a screening area after the vibration crushing is finished;

I. magnetically screening the pickling solution residues through a magnetic adsorption device to obtain magnetically adsorbed pickling solution metal residues;

J. and guiding the residual pickling solution non-metal residues after magnetic screening into a first smelting furnace for smelting and decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the pickling solution metal residues, and guiding the pickling solution metal residues into a second smelting furnace for smelting and recovery.

In a preferred embodiment of the present invention, the method of transporting the stainless steel taken out to a brushing area for cleaning comprises:

shot blasting is carried out on the stainless steel through a freezing trimmer; and

and carrying out ultrasonic cleaning on the stainless steel through an ultrasonic cleaning tank.

As a preferred mode of the invention, the process further comprises:

and transporting the stainless steel subjected to the cleaning treatment to a finished product placing area.

As a preferred mode of the invention, the process further comprises:

guiding the residual liquid after the circular filtration in the pickling tank to an inspection area;

and (4) carrying out discharge standard inspection on the residual liquid after the circular filtration through a wastewater discharge standard inspection device, discharging the residual liquid when the residual liquid is qualified, and otherwise, refluxing the residual liquid into the pickling tank for continuous circular filtration.

The invention realizes the following beneficial effects:

1. the stainless steel cleaning device can dry sewage after stainless steel cleaning is finished, stainless steel residues are obtained, the stainless steel residues are magnetically screened, the residual stainless steel non-metal residues after magnetic screening are smelted and decomposed, and the stainless steel metal residues which are magnetically adsorbed are led into the second smelting furnace to be smelted and recovered, so that the stainless steel cleaning sewage can be effectively recycled by materials, and the recovery efficiency is improved.

2. The invention can circularly filter the pickling solution to obtain the filtered pickling solution residues, perform vibration crushing on the pickling solution residues, perform magnetic screening on the pickling solution residues after vibration crushing, further perform smelting decomposition on the residual pickling solution non-metal residues after magnetic screening, and introduce the magnetically adsorbed pickling solution metal residues into the second smelting furnace for smelting recovery, thereby effectively performing material-based recovery treatment on the sewage after stainless steel pickling and improving the recovery efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a flow chart of a process for recycling stainless steel pickling residues according to a first embodiment of the present invention;

FIG. 2 is a flow chart of a recycling process of stainless steel pickling residues according to a second embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments; in the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure; one skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc.; in other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.