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A kind of slag wool and production method thereof

A production method and a technology for slag wool, which are applied in the field of iron and steel smelting, can solve the problems of difficult and uniform mixing, large investment, slag homogenization, and difficulty in temperature uniformity, and achieve the effects of simple operation and good performance.

Active Publication Date: 2017-04-05
PANZHIHUA HUANYE METALLURGICAL SLAG DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is difficult to use this method to temper molten blast furnace slag. On the one hand, since the density of the cold-state conditioner is lighter than that of hot-melt liquid blast-furnace slag, the added conditioner tends to float on high On the other hand, blast furnace slag has a high viscosity, and it is difficult to mix the two evenly if certain stirring measures are not taken, and the investment in facilities capable of stirring at high temperature is relatively large
Therefore, when using this method to prepare slag wool from molten blast furnace slag, it is necessary to increase smelting equipment, and it is still relatively difficult to achieve homogeneous slag and uniform temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A company uses iron slag as raw material to smelt pig iron with iron furnace. 30 tons of iron slag is put into the furnace. 1 ton of limestone and 1.5 tons of silica are used as tempering materials. The slag iron, limestone, and silica are mixed evenly and put into the iron furnace for smelting. The molten iron obtained from smelting is sent to the refining furnace for the next step of refining. Method to produce slag wool. After testing, the density of mineral wool is 140kg / m 3 , the average fiber diameter is 5.4 microns, and the shrinkage temperature under heat load is 651°C. The index meets the performance requirements of "Rock Wool, Slag Wool and Their Products for Thermal Insulation" (GB / T11835-2007).

Embodiment 2

[0027] A company uses slag iron as raw material and smelts it in an electric arc furnace. It plans to add 45 tons of slag iron. The measured iron content in the slag iron is 80%, so the amount of blast furnace slag tailings in the slag iron is 9 tons. Add 2 tons of basalt And 1 ton of dolomite is used as the tempering material, and the slag iron, basalt, and dolomite are mixed evenly and then put into the electric arc furnace for smelting. The molten iron obtained from the smelting is sent to the refining furnace for the next step of refining, and the smelted tailings are blown according to the traditional method Preparation of slag wool. After testing, the mineral wool density is 145kg / m 3 , the average fiber diameter is 6.4 microns, and the thermal load shrinkage temperature is 670°C. The index meets the performance requirements of "Rock Wool, Slag Wool and Their Products for Thermal Insulation" (GB / T11835-2007).

Embodiment 3

[0029] A company uses slag iron as raw material and smelts it in an electric arc furnace. It plans to add 48 tons of slag iron. The measured content of metallic iron in the slag iron is 85%, so the amount of blast furnace slag tailings in the slag iron is 7.2 tons. Add 2 tons of basalt And 0.5 tons of limestone as the tempering material, mix iron slag, basalt and limestone evenly and put them into the electric arc furnace for smelting, the molten iron obtained from smelting is sent to the refining furnace for the next step of refining, and the tailings obtained from smelting are produced by traditional injection method Slag wool. After testing, the mineral wool density is 145kg / m 3 , the average fiber diameter is 6.8 microns, and the thermal load shrinkage temperature is 695°C. The index meets the performance requirements of "Rock Wool, Slag Wool and Their Products for Thermal Insulation" (GB / T11835-2007).

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Abstract

The invention belongs to the field of iron and steel smelting, and in particular relates to mineral cotton and a production method thereof. The invention aims to provide the production method of the mineral cotton. The method comprises the following steps: raw material iron slag and quenching and tempering materials are uniformly mixed in proportion and then are poured into a smelting furnace to be melted so as to obtain molten iron and slag, wherein the slag are made into the mineral cotton in a centrifuging or blowing manner; the proportion by weight of the quenching and tempering materials to blast-furnace slag in the iron slag is 25-60%. The method is simple and convenient to operate, and is low in equipment investment, the obtained mineral cotton is good in performance, and the invention provides a more effective method for the production of the mineral cotton.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a slag wool and a production method thereof. Background technique [0002] Slag wool is made of blast furnace slag as the main raw material, adding part of the conditioning agent, and is made of filamentary inorganic fiber by high-speed centrifugation or blowing after melting. Its production is generally based on ordinary blast furnace slag and basalt as the main raw material, mixed with a certain proportion of silica, dolomite, etc. Slag wool. At present, there are also reports on the use of hot blast furnace slag as raw materials in China, such as the patent "a method for processing slag wool" (application number: 201210085131.5), and the patent "method for directly producing slag wool with hot-melted titanium-containing blast furnace slag" (application number: 201210204789.3) all propose to use hot-melt blast furnace slag to produce slag wool, which can uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/005C03C13/06
CPCC03B37/005C03C13/06
Inventor 何奇杨志远余韵吴斌杨胜利苏辉
Owner PANZHIHUA HUANYE METALLURGICAL SLAG DEV CO LTD