Method for applying slag pressing agent produced by blast furnace gun mud to converter steelmaking

A technology of converter steelmaking and slag pressing agent, which is applied in the manufacture of converters, etc., to eliminate land occupation and pollution problems, improve metal yield, and achieve remarkable effects in environmental protection and economic benefits

Active Publication Date: 2015-04-22
XINJIANG BAYI IRON & STEEL
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Problems solved by technology

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Method used

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Examples

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Example Embodiment

[0014] Examples:

[0015] With a 3×2500m 3 The blast furnace and 3×120 ton converter iron and steel enterprises are implemented as examples. Among them, the blast furnace produces 15,000 tons of iron per day, produces 10 tons of waste blast furnace mud, the converter produces 18,000 tons of molten steel per day, and requires 15 tons of slag pressing agent per day.

[0016] 1) Pull the abandoned blast furnace mud to the crushing area.

[0017] 2) Add the GYP-300 small inertial cone crusher produced by Beijing Kate Crusher Co., Ltd. into the crushing area to form powder particles below 1mm, packed in large bags, and transported to the ball production line for use.

[0018] 3) Procurement of limestone powder with a particle size of less than 1mm produced by Xinjiang Harmony Mining and transported to the press ball production line for use.

[0019] 4) Using the ST-25 twin-shaft mixer produced by Xinjiang Zhonghe Dazheng Technology Co., Ltd., the waste gun mud and limestone powder are added...

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Abstract

The invention discloses a method for applying a slag pressing agent produced by blast furnace gun mud to converter steelmaking. The method comprises the following steps: firstly crushing waste blast furnace gun mud into powder particles with particle size being smaller than 1mm by using a cone crusher or a raymond mill, selecting can delivering limestone powder with particle size being smaller than 1mm to a ball-pressing production line for later use; adding the gun mud powder and the limestone powder into a stirrer according to a mass ratio of 95 to 5, uniformly stirring and mixing by using a circulation operation manner, wherein the total weight of the materials added at each time is 5 tons, and the time only used for stirring after adding the materials lasts for 35 minutes; then discharging the materials; adding the uniformly-mixed raw materials into a dry powder ball pressing machine or a fireproof material ball pressing machine to be pressed into oval balls with size of 30+/-5mm; and drying the oval balls, then delivering the dried oval balls to a converter production line, conveying the oval balls to a high material bin for later use by using a belt conveyor system, adding the oval balls in the process of pressing slag by the converter according to a process of normally using the slag pressing agent, defoaming and pressing slag.

Description

Technical field [0001] The invention relates to a method for producing slag pressing agent from blast furnace mud for converter steelmaking. Background technique [0002] Clay is the raw material used to block the taphole of the iron-making blast furnace. It is squeezed into the taphole by the mud gun through pressure, so it is called the taphole. Blast furnace mud is a refractory material used to seal the taphole of the iron-making blast furnace. At present, it can be divided into two categories: water shot mud and anhydrous shot mud. The former is used in the medium where the top pressure is low and the degree of enhanced smelting is not high. , Small blast furnace, the latter is on the large and medium blast furnaces with higher top pressure and high degree of intensified smelting. But most of the composition of gun mud can be divided into two parts: refractory aggregate and binder. Refractory aggregate refers to refractory raw materials such as corundum, mullite, coke gemst...

Claims

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Application Information

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IPC IPC(8): C21C5/28
Inventor 黄星武
Owner XINJIANG BAYI IRON & STEEL
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