Metal product surface sludge ferrous chloride recovery treatment process

A technology for ferrous chloride and metal products, applied in water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, metallurgical wastewater treatment, etc. Low-level problems, to achieve the effect of high crystal purity and simple processing technology

Pending Publication Date: 2021-03-30
江苏荣信环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The purity of ferrous chloride obtained from traditional metal product surface sludge ferrous chloride recovery treatment is low, and the sludge cannot be directly used, and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025]Example 1:

[0026]The surface sludge of the metal article adopted in this example is ferrous recovery process, including the following steps:

[0027]Step 1: Collect the surface sludge of the metal article, and the mixture of sludge and waste acid after pickling and pickling after pickling.

[0028]Step 2: Connect the mixture of the sludge and waste acid to the evaporative tank, 0.35 MPa of the evaporation tank, the temperature is set to 40 ° C, the rotational speed is set to 40R / min, when the chloride concentration does not change The evaporation tank is 0.5 MPa, the temperature is increased to 55 ° C, and the rotational speed is set to 55 r / min until the chloride concentration is unchanged, the evaporation can be pressured, and the internal chloride is naturally cooled, and there is appeared A small amount of crystallization;

[0029]Step 3: Press the evaporation tank with a negative pressure of 0.65 MPa, and the temperature is set to 70 ° C until the chloride concentration is unch...

Example Embodiment

[0033]Example 2:

[0034]The surface sludge of the metal article adopted in this example is ferrous recovery process, including the following steps:

[0035]Step 1: Collect the surface sludge of the metal article, and the mixture of sludge and waste acid after pickling and pickling after pickling.

[0036]Step 2: The mixture of the sludge and the waste acid liquid is accessed into the evaporative tank, and the evaporation tank is 0.35 MPa, the temperature is set to 50 ° C, the rotational speed is set to 45R / min, when the chloride concentration is unchanged The evaporation tank is 0.5 MPa, the temperature is increased to 60 ° C, and the rotational speed is set to 65R / min until the chloride concentration is unchanged, the evaporation tank is pressed, and the internal chloride is naturally cooled, and there is appeared A small amount of crystallization;

[0037]Step 3: The evapozzo tank is 0.65 MPa, and the temperature is set to 75 ° C until the chloride concentration is unchanged, and the eva...

Example Embodiment

[0041]Example 3:

[0042]The surface sludge of the metal article adopted in this example is ferrous recovery process, including the following steps:

[0043]Step 1: Collect the surface sludge of the metal article, and the mixture of sludge and waste acid after pickling and pickling after pickling.

[0044]Step 2: Access the mixture of the sludge and waste acid to the evaporative tank, 0.35 MPa of the evaporation tank, the temperature is set to 40-50 ° C, the rotational speed is set to 45R / min, when the ferride concentration is not After the change, the evaporation tank was 0.5 MPa, the temperature was increased to 55 ° C, and the rotational speed was set to 65 r / min until the chloride concentration was unchanged, and the evaporation tank was pressed, and the internal chloride was naturally cooled. There is a small amount of crystallization;

[0045]Step 3: Press the evaporation tank with a negative pressure of 0.65 MPa, and the temperature is set to 70 ° C until the chloride concentration i...

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PUM

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Abstract

The invention discloses a metal product surface sludge ferrous chloride recovery treatment process, which comprises the following steps: collecting metal product surface sludge, carrying out acid pickling, inoculating a mixture of the sludge and a waste acid solution into an evaporation tank, setting the negative pressure of the evaporation tank to be 0.35 MPa, the temperature to be 40-50 DEG C and the rotating speed to be 40-45 r/min, and raising the negative pressure of the evaporation tank to be 0.5 MPa, the temperature to be 55-60 DEG C and the rotating speed to be 55-65 r/min, carrying out pressure relief on the evaporation tank, naturally cooling internal ferrous chloride, forming a small amount of crystals, setting the negative pressure of the evaporation tank to be 0.65 MPa and thetemperature to be 70-75 DEG C, forming a large amount of crystals, carrying out solid-liquid separation, screening a mixture of ferrous chloride crystals and sludge, washing with water in the screening process to obtain ferrous chloride crystals, and drying. According to the invention, the preparation process is simple, the purity of the treated ferrous chloride dry crystals is high, the separated sludge is pollution-free, and subsequent treatment can be directly carried out.

Description

technical field [0001] The invention relates to the technical field of sludge ferrous chloride recovery and treatment, in particular to a process for recovery and treatment of sludge ferrous chloride on the surface of metal products. Background technique [0002] The purity of ferrous chloride obtained from traditional metal product surface sludge ferrous chloride recovery treatment is low, and the sludge cannot be directly used, and subsequent treatment processes are required to realize reuse. Therefore, an improved technology is urgently needed to solve the problem of existing technologies. This problem exists in . Contents of the invention [0003] The object of the present invention is to provide a kind of metal products surface sludge ferrous chloride recovery treatment process, the dry crystal purity of ferrous chloride after the treatment is high, the separated sludge is pollution-free, and can directly carry out follow-up treatment, to solve the above-mentioned Qu...

Claims

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Application Information

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IPC IPC(8): C01G49/10C02F1/04C02F11/13C02F101/12C02F103/16
CPCC01G49/10C02F1/04C02F11/13C02F2101/12C02F2103/16
Inventor 施荣标
Owner 江苏荣信环保科技有限公司
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