Special coke membrane treatment fluid for blast furnace

Abstract

The invention discloses a special coke membrane treatment fluid for a blast furnace. The treatment fluid consists of the following raw materials in parts by mass: 55 to 65 parts of boric acid, 6 to 10 parts of borax, 7 to 10 parts of silicon ash, 1 to 5 parts of a high-efficiency dispersant, 6 to 10 parts of a high-energy film forming solution and 800 to 1,200 parts of water, wherein the high-efficiency dispersant consists of the following raw materials in parts by mass: 0.5 to 2 parts of titanium dioxide and 1 to 5 parts of carbon black; the high-energy film forming solution consists of the following raw materials in parts by mass: 0.5 to 3 parts of hydroxypropyl methyl cellulose, 1 to 4 parts of polyethylene glycol, 0.5 to 2 parts of polyacrylamide and 60 to 120 parts of water. Compared with the prior art, the treatment fluid has the advantages that the treatment fluid is economical, practical, low in cost, nontoxic, harmless, tasteless and free of environmental pollution, simplicity and safety in the whole production and operation process are ensured, the viscosity of furnace slag is reduced, flowability is improved, the degradation of coke in the furnace is reduced, a supporting function of a skeleton is enhanced, the slipping and sinking of the blast furnace are inhibited, the low-temperature RDI (Reduction Degradation Index) of iron-containing furnace burden in the blast furnace is improved, the utilization coefficient of the blast furnace is increased, the hourly output is increased, the coke ratio is reduced, the fuel ratio of the blast furnace is reduced, and the iron yield is increased.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting, and in particular relates to a special coke film method treatment liquid for blast furnaces. Background technique [0002] Coke is produced from a variety of coals through high-temperature coking. It is mainly used in blast furnace ironmaking and blast furnace smelting of non-ferrous metals such as copper, lead, and zinc. It acts as a reducing agent, heating agent, and material column skeleton. Coke reactivity refers to the ability of coke to chemically react with carbon dioxide, oxygen and water vapor. The mass loss of carbon after a unit mass of sample reacts with carbon dioxide per unit time is a quantitative concept of coke reactivity. [0003] The addition of catalysts is the main method for producing highly reactive coke. The influence of various catalysts on the catalytic ability of coke gasification reaction is alkali metals, alkaline earth metals and transition elements i...

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Problems solved by technology

However, when the reactivity of coke is too high, the pulverization degree and dissolution loss rate of coke in the furnace will increase, the utilization rate of coke will decrease and the quality of blast furnace ironmaking will decrease.

With the shortage of coking coal carbon resources in our country, it is still impossible to guarantee the improvement of coke quality and the reduction of ironmaking cost by completely relying on coking coal for coking.

At present, metallurgical coke or low-quality coke that cannot meet the standard cannot be used in blast furnace smelting, which makes the shortage of coking coal carbon resources in my country more prominent.

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