Process method and apparatus for directly producing mineral wool from thermal state blast furnace slag

Abstract

The invention relates to the production field of mineral wool, and particularly relates to a method and an apparatus for directly producing mineral wool from thermal state blast furnace slag. According to the apparatus for directly producing the mineral wool from the thermal state blast furnace slag, a slag ladle is disposed on a slag ladle vehicle; a stirring gas inlet is disposed at the bottom of the slag ladle; a slag ladle cover is provided with a material-feeding port, an exhaust port and a heating electrode; a tilting mechanism has a tempering station matched to the slag ladle and a homogenizing station matched to a homogenizing furnace; and the homogenizing furnace is communicated with a centrifugal wool-making machine through a melt flowing port. The process method for directly producing the mineral wool from the thermal state blast furnace slag comprises the steps of preparing the melt slag, tempering, homogenizing and making the wool. Mixed melt slag in the slag ladle is in no need of being transported to the homogenizing furnace, so that heat loss during the transportation process of the melt slag of the furnace is reduced; the homogenizing furnace makes the chemical components of the melt body more stable and uniform, so that the quality of the mineral wool fibers can be increased; and the process makes use of the heat energy of the melt slag, reduces cost for manufacturing mineral wool, and improves manufacturing environment of the mineral wool products.

Description

technical field [0001] The invention relates to the field of mineral wool production, in particular to a method and a device for directly producing mineral wool from blast furnace slag. Background technique [0002] Blast furnace slag is a high-temperature by-product produced in blast furnace ironmaking, with a temperature of about 1400°C to 1600°C. Generally speaking, 1 ton of slag contains 1600~1800MJ of heat, which is approximately equivalent to the heat generated by the complete combustion of 55~61kg of standard coal. The traditional blast furnace slag treatment is either hot-splashed, and the large dry slag after cooling is used as a melting raw material for the mineral wool industry, or water-quenched into fine-grained water-quenched slag, which is used as a raw material for the cement industry or slag powder raw material, no matter which process Both produce a lot of pollution. [0003] Mineral wool is a high-quality thermal insulation material. The traditional tech...

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Problems solved by technology

There are many equipments involved in the transfer process, the operation is complicated, and a lot of heat is lost during the packaging process. Part of the molten slag is solidified due to the temperature drop and cannot be injected into the quenching and tempering furnace. It can only be treated by cold disposal; The energy consumption required for slag supplementary heating also increases accordingly

If the amount of molten slag discharged in a blast furnace slag discharge cycle reaches tens or even hundreds of tons, it is also very difficult to receive all of them with large slag bags

In addition, in the process of quenching and tempering slag, the existing technology is to use the impact generated when the slag falls into the container to realize the stirring and mixing of the tempering material and the slag; the actual production shows that only by injecting blast furnace slag The instantaneous stirring effect cannot achieve the full mixing of slag and tempering material, which affects the product quality of mineral wool

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