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Anti-annealing bonding cold-rolled strip cleaning agent

A cold-rolled strip and cleaning agent technology, applied in the field of anti-annealing and bonding cold-rolled strip cleaning agent, can solve problems such as waste products, strip tearing and deformation, and achieve good cleaning effect, good cleaning performance, and excellent anti-sticking conjunctive effect

Inactive Publication Date: 2015-09-23
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the strip steel coil is easily bonded during the annealing process in the bell furnace, horseshoe-shaped imprints are formed on the surface of the strip steel after being flattened, and in severe cases, the strip steel is torn and deformed to produce waste products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 25% NaOH by weight percentage, 25% Na 2 CO 3 , 25% Na 3 PO 4 , 20% Na 2 SiO 3 , 5% disodium ethylenediaminetetraacetate, uniformly mix the above raw materials to prepare anti-annealing bonded cold-rolled strip cleaning agent 1.

[0022] Add anti-annealing bonding cold-rolled strip cleaning agent 1 directly to the water in the cleaning section before recrystallization annealing, so that the weight percent concentration is 3%, and clean the surface of the strip to be annealed under the condition that the pickling temperature is 85°C. After testing, the cleaning efficiency reaches 99.1%, and the residue on the steel plate surface is less than 6mg / m 2 , the steel plate does not bond.

Embodiment 2

[0024] Take 35% NaOH by weight percentage, 15% Na 2 CO 3 , 15% Na 3 PO 4 , 30% Na 2 SiO 3 , 5% disodium ethylenediaminetetraacetate, uniformly mix the above raw materials to prepare anti-annealing bonded cold-rolled strip cleaning agent 2.

[0025] Add anti-annealing bonding cold-rolled strip cleaning agent 2 directly to the water in the cleaning section before recrystallization annealing, so that the weight percentage concentration is 5%, and clean the surface of the strip to be annealed under the condition that the pickling temperature is 70 ° C. After testing, the cleaning efficiency reaches 99.1%, and the residue on the steel plate surface is less than 6mg / m 2 , the steel plate does not bond.

Embodiment 3

[0027] Take 30% NaOH by weight percentage, 20% Na 2 CO 3 , 20% Na 3 PO 4 , 23% Na 2 SiO 3 , 7% disodium ethylenediamine tetraacetate, uniformly mix the above raw materials to prepare anti-annealing bonded cold-rolled strip cleaning agent 3.

[0028] Add the anti-annealing bonding cold-rolled strip cleaning agent 3 directly to the water in the cleaning section before recrystallization annealing, so that the weight percent concentration is 4%, and the surface of the strip to be annealed is cleaned under the condition that the pickling temperature is 75°C, After testing, the cleaning efficiency reaches 99.3%, and the residue on the steel plate surface is less than 6mg / m 2 , the steel plate does not bond.

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PUM

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Abstract

The invention discloses a cold-roll strip steel cleaning agent capable of preventing bonding during annealing and an application thereof. The cleaning agent comprises the components in percentage by weight: 25-35 percent of NaOH, 15-25 percent of Na2CO3, 15-25 percent of Na3PO4, 20-30 percent of NaSiO3, and 5-7 percent of disodium EDTA. When the cleaning agent is in use, by weight percent, 3-5 percent of the cleaning agent is added into water to form a cleaning solution, and cold-roll steel plate can be cleaned in the cleaning solution at the temperature of 70-85 DEG C before annealing. The cleaning agent has no strong pungent odor, can be directly added into the frequently-used cleaning water before recrystallization annealing, is convenient to use and has a good cleaning effect; and the cleaning efficiency is higher than 99 percent, and the residue on strip steel plate surface is smaller than 6 mg / m<2>, and the bonding of the steel plate is also avoided.

Description

technical field [0001] The invention relates to a cleaning agent for the surface of cold-rolled steel strips before annealing, in particular to a cleaning agent for anti-annealing and bonding cold-rolled steel strips. Background technique [0002] Bell furnace recrystallization bright annealing can eliminate the work hardening and internal stress produced in the cold deformation process of cold-rolled strip steel, optimize the microstructure of the material, and make the strip steel have excellent mechanical properties and bright surface. However, since the steel strip is easily bonded during the annealing process in the bell furnace, horseshoe-shaped imprints are formed on the surface of the steel strip after it has been flattened, which may lead to tearing and deformation of the steel strip to produce waste products in severe cases. Bonding is the result of interpenetration of atoms between layers of steel coils at high temperatures, and the cleanliness of the strip surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/18C23G1/19
Inventor 黄先球石争鸣李立军刘建容张万灵程鹏马颖郎丰军王靓
Owner 武汉钢铁有限公司
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