Regenerative castable prepared from waste main runner materials from blast furnace

A castable and blast furnace technology, which is applied in the field of unshaped refractory materials, can solve problems such as lowering of raw material grades, leakage of slag ditch, and potential safety hazards affecting blast furnace production.

A castable and blast furnace technology, which is applied in the field of unshaped refractory materials, can solve problems such as lowering of raw material grades, leakage of slag ditch, and potential safety hazards affecting blast furnace production.

CN107353022AInactive Publication Date: 2017-11-17SUZHOU NORETA NEW MATERIAL TECH
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  • Regenerative castable prepared from waste main runner materials from blast furnace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The proportion of aggregates with bauxite particle size ≤ 8-1mm is 40%; the proportion of aggregates with corundum particle size ≤ 8-1mm is 30%; the proportion of corundum aggregates with particle size ≤ 0-1mm is 3%; the proportion of corundum aggregates with particle size ≤ 0.088mm The proportion of powder is 3.85%; the proportion of waste main channel material fine powder with a particle size of ≤0.088mm is 6%; the silicon carbide with a particle size of ≤1mm is 5%, the metal silicon with a particle size of ≤1mm is 3%, and sodium tripolyphosphate is 0.15%; the particle size is ≤50μm Alumina micropowder 4%; calcium aluminate cement 3%; asphalt 2%, the softening point of asphalt powder is 125°C.

Embodiment 2

[0022] The proportion of aggregates with corundum particle size ≤ 8-1mm is 56.05%; the proportion of alumina aggregates with particle size ≤ 0-1mm is 1%; the proportion of corundum fine powder with particle size ≤ 0.088mm is 10.0%, and the abandoned main ditch with particle size ≤ 0.088mm The proportion of fine powder is 10%, silicon carbide with a particle size of ≤1mm is 15%, silicon metal with a particle size of ≤1mm is 1%, sodium hexametaphosphate is 1%, silica micropowder is 3%, calcium aluminate cement is 4%, and asphalt is 0.95%. The softening point of asphalt powder is 120°C.

Embodiment 3

[0024] The proportion of aggregates with corundum particle size ≤ 8 ~ 1mm is 32.45%, the proportion of aggregates with corundum particle size ≤ 8 ~ 1mm is 25%, the proportion of corundum aggregates with particle size ≤ 0 ~ 1mm is 3%, particle size ≤ 0.088 The proportion of corundum fine powder in mm is 5%, the proportion of waste main channel material fine powder with particle size ≤0.088mm is 10%, silicon carbide with particle size ≤0.074mm is 5%, metal silicon with particle size ≤1mm is 5%, sodium hexametaphosphate 0.05 %, particle size ≤ 50μm alumina micropowder 3%, calcium aluminate cement 2.5%, asphalt 4%, the softening point of asphalt powder is 120°C.

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Abstract

The invention discloses a regenerated pouring material manufactured by using waste blast furnace main channel material. Its technical solution: a recycled castable made by using the waste blast furnace main channel material, its components and mass percentage content are: 55-70% of the aggregate with a particle size of 1-8mm, and 55-70% of the aggregate with a particle size of 0-1mm 1-10%; 3-10% for corundum powder with particle size ≤0.088mm, 3-20% for waste main channel powder with particle size ≤0.088mm, 5-15% for silicon carbide with particle size ≤1mm, and 5-15% for silicon carbide with particle size ≤1.0mm 1-5% of metal silicon, 1-5% of auxiliary binder, 3-7% of alumina or silica powder with particle size ≤50μm; 2.5-7% of calcium aluminate cement. The invention provides a recycled castable that can be safely used. The proportion of fine powder of the discarded main ditch castable is not high, which is safe and reliable. The prepared recycled castable has good oxidation resistance and strong corrosion resistance, and can be safely used in blast furnace slag. Ditch and iron ditch production.

Description

technical field [0001] The invention relates to a monolithic refractory material, in particular to a regenerated castable made from waste blast furnace main channel material. Background technique [0002] Using waste blast furnace main channel materials to manufacture recycled castables can reduce costs, increase the degree of recycling of refractory resources, and reduce waste of resources. The technology in this respect has been reported both at home and abroad. For example, "Baosteel Technology" 2008, (2): 77-80 pages, publicly reported the basic situation of waste refractory materials at home and abroad, introduced in detail the situation of Baosteel's waste main channel castables, combined with the waste main channel materials after use characteristics have been intensively researched and developed. The dense corundum raw material was successfully extracted from the discarded main ditch castable. The physical index of the raw material met the requirements of new raw m...

Claims

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Application Information

Patent Timeline
17 Nov 2017
Publication
CN107353022A
IPC
C04B35/66
CPC
C04B35/66
Inventors
马少杰; 杨小猛