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Treatment method for scale on surface of vanadium production equipment

A technology of production equipment and treatment method, which is applied in the field of metallurgy, can solve the problems of unsatisfactory treatment effect and low efficiency of scaling treatment on the surface of vanadium production equipment, and achieve the effects of increasing vanadium yield, protecting the environment, and ensuring smooth production

Active Publication Date: 2016-12-07
攀钢集团西昌钒制品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of low efficiency of scaling treatment on the surface of vanadium production equipment and unsatisfactory treatment effect, the invention provides a treatment method for scaling on the surface of vanadium production equipment

Method used

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  • Treatment method for scale on surface of vanadium production equipment
  • Treatment method for scale on surface of vanadium production equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Measure the fouling layer thickness 200mm of the vanadium transport pipe with a vernier caliper; according to the formula descaling agent consumption: (scaling layer thickness*equipment internal surface area)=250kg / m Calculate the descaling agent consumption 2000kg; Prepare NaOH mass concentration as 51% Descaling agent 8000L; inject the prepared descaling agent into the vanadium precipitation equipment, heat it to 70°C, and keep it warm for 10 hours; discharge and recycle the descaling sewage in the vanadium precipitation equipment; clean the inner wall of the equipment with clean water, and test the pH of the cleaning water to 7.1 , Stop cleaning when the turbidity is 200-300; part of the cleaning water is recovered for the preparation of descaling agent, and the cleaning effect is shown in Table 1.

Embodiment 2

[0044] Use a vernier caliper to measure the thickness of the scaling layer of the vanadium-precipitating heat exchange equipment to 100mm; according to the formula descaling agent dosage: (thickness of the scaling layer*equipment inner surface area)=200kg / m3 calculate the amount of descaling agent 800kg; prepare KOH mass concentration of 42% 4000L of descaling agent; inject the prepared descaling agent into the vanadium precipitation equipment, heat it to 100°C, and keep it warm for 20h; discharge and recycle the descaling sewage in the vanadium precipitation equipment; clean the inner wall of the equipment with clean water, and test the pH of the cleaning water 7.0, stop cleaning when the turbidity is 200-300; part of the cleaning water is recovered for the preparation of descaling agent, and the cleaning effect is shown in Table 1.

Embodiment 3

[0046] Measure the fouling layer thickness 150mm of vanadium precipitation reaction tank with vernier caliper; According to the amount of formula descaling agent: (thickness of fouling layer*equipment internal surface area)=230kg / m Calculate the amount of descaling agent 1400kg; Prepare Na 2 CO 3 6000L of descaling agent with a mass concentration of 42%; inject the prepared descaling agent into the vanadium precipitation equipment, heat it to 85°C, and keep it warm for 15 hours; discharge and recycle the descaling sewage in the vanadium precipitation equipment; wash the inner wall of the equipment with clean water, Check the pH of the cleaning water to be 7.0, and stop cleaning when the turbidity is 200-300; part of the cleaning water is recovered for the preparation of descaling agent, and the cleaning effect is shown in Table 1.

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Abstract

The invention relates to a treatment method for scale, in particular to a treatment method for scale on the surface of vanadium production equipment and belongs to the field of metallurgy. The treatment method for the scale on the surface of the vanadium production equipment comprises the following steps that firstly, measuring is conducted; secondly, calculating is conducted, wherein the dosage of an anti-scaling agent is calculated according to the formula that the thickness of a scale layer times the inner surface area of the equipment is equal to 200 kg / m<3> to 250 kg / m<3>; thirdly, the scale is removed; fourthly, cleaning is conducted; and fifthly, waste liquid is recycled. According to the treatment method for the scale on the surface of the vanadium production equipment, the scale problem of the equipment under the calcified roasting-acid pickling vanadium liquid technology is effectively solved, it is ensured that production is smoothly conducted, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a treatment method for scaling, in particular to a treatment method for scaling on the surface of vanadium production equipment, and belongs to the field of metallurgy. Background technique [0002] Calcification roasting-acid leaching vanadium liquid vanadium oxide clean production process is the mainstream of vanadium production at home and abroad. Under this process condition, there is a large amount of Ca in the vanadium solution. 2+ , Mn 2+ , Fe 3+ , NH 4 + , SO 4 2- and polyvanadate plasma, sulfate and vanadate will inevitably be generated during the production process. With the extension of the production cycle, the materials adhered to the inner wall of the pipeline and equipment will form a layer of hard scaling material, resulting in The vanadium solution reduces production efficiency through flow attenuation and single-tank output reduction; if the scale is serious, it will also block the transmission pipeline ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/14
CPCC23G1/14
Inventor 张廷建王绍东
Owner 攀钢集团西昌钒制品科技有限公司
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