Scale cleaning agent and cleaning method for cinder flushing water system of iron-making plant

Abstract

The invention relates to a scale cleaning agent for a cinder flushing water system of an iron-making plant. The scale cleaning agent contains the following components in percentage by mass: 5%-45% of S-carboxyethyl thiosuccinic acid, 1%-45% of polyether polyamino methylene phosphonate N-oxide, 6%-40% of an acrylic acid-hydroxypropyl acrylate copolymer, 20%-35% of hydrochloric acid, 1%-25% of diethylenetriamine pentamethylene phosphate and 0.1%-3% of diisooctyl cis-butenedioate sulfonate, wherein the mass concentration of hydrochloric acid is 30%-36%. The invention further relates to a cleaning method for the cinder flushing water system of the iron-making plant. According to the scale cleaning agent, scale of equipment and pipelines in the cinder flushing water system of the iron-making plant can be effectively cleared; the scale cleaning agent has the advantages that the pertinence is strong, a formula is environment-friendly, the cost is low, and the preparation is simple; and the cleaning method has the advantages that the operation steps are simple and feasible, the cleaning is flexible, and use equipment is few.

Description

Technical field [0001] The invention relates to the technical field of chemical system cleaning, in particular to a scale cleaning agent and cleaning method for a slag flushing water system in an ironmaking plant. Background technique [0002] Blast furnace slag is a solid waste formed from gangue in ore, ash in fuel and non-volatile components in flux during the process of blast furnace ironmaking. It mainly contains oxides of calcium, silicon, aluminum, magnesium, and iron and a small amount Sulfide. [0003] The blast furnace slag water quenching process is currently the main method for processing blast furnace slag in my country's ironworks. This method uses circulating water to water quench the blast furnace slag through the slag flushing water system. See figure 1 , Which is a schematic diagram of the slag flushing water system of an existing ironmaking plant, and the arrow in the figure indicates the flow of circulating water. The slag flushing water system generally inclu...

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Problems solved by technology

[0007] However, due to the complex scaling components in the slag flushing water system of ironworks, including calcium and magnesium carbonate scale, silicate scale, phosphate scale, iron oxide scale, aluminum scale, sulfur scale and other deposits, and Scaling types include inorganic scale, colloidal scale, etc. In the prior art, there is no effective cleaning agent and cleaning method specifically for scaling in the slag flushing water system. It is difficult to maintain the stability of the circulating water in the system, and the scaling of equipment and pipelines is still serious. Affecting the operation of the slag flushing water system

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