Large-area self-flow material for water-based revolving furnace and preparation method thereof
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A self-flowing, large-scale technology, used in the field of converter repair and unshaped refractory materials, can solve the problems of toxic sintering smoke polluting the environment, endangering human health, and long sintering time, achieving excellent physical properties, sintering process safety, and sintering time. short effect
Active Publication Date: 2015-04-08
北京联合荣大工程材料股份有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a water-based converter large surface self-flowing material and its preparation method, so that it can solve the problem that the life of the traditional asphalt / resin combined converter large surface self-flowing material and sodium metasilicate combined large surface self-flowing material is not high, and at the same time It solves the problems of too long sintering time of asphalt / resin combined large fabric, sintering poisonous smoke pollutes the environment, and endangers human health, etc.
Method used
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Embodiment 1
[0033] Embodiment 1: a kind of water-based converter large surface self-flowing material and its preparation method,
[0034] Performance indicators of the main raw materials used:
[0035]
[0036] A kind of converter large surface self-flowing material, by weight percentage, is composed as follows:
[0037] Mid-grade magnesia 12;
[0038] High-purity magnesia 40;
[0039] Fused magnesia 40;
[0040] Silica fine powder 8;
[0041] Sodium citrate 0.5;
[0042] Boric acid 0.06;
[0043] Liquid binder 5.2;
[0044] After the materials produced according to the above scheme were mixed on site, a comparative test was carried out on the 30t converter of a domestic steel factory with the traditional asphalt / resin materials provided by a domestic manufacturer. The test results are shown in the table below
[0045] Material
Embodiment 2
[0047] Performance indicators of the main raw materials used:
[0048]
[0049]
[0050] By weight percentage, the composition is as follows:
[0051] Synthetic magnesia calcium sand 25
[0052] High-purity magnesia 34;
[0053] Fused magnesia 34
[0054] Silica fine powder 6.5;
[0055] Sodium citrate 0.8;
[0056] Boric acid 0.08;
[0057] Liquid binder 5.4;
[0058] After the materials produced according to the above scheme are stirred on site, the service life of a 70t converter in a domestic steel plant has reached more than 85 furnaces.
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Abstract
The invention relates to a large-area self-flow material for a water-based revolving furnace and a preparation method thereof. The large-area self-flow material comprises the following components in parts by weight: 60-88 parts of magnesium oxide MgO, 6-18 parts of silicon dioxide SiO2, 0.5-15 parts of calcium oxide CaO, 0-0.5 part of a retarding agent and 0.1-0.5 part of a water reducing agent, wherein a liquid bonding agent is increased by 5-6 parts by weight during stirring; and the flow value (self-flow) is 240-320 millimeters. The preparation method comprises the following steps of: adding sodium citrate, sodium tartrate, boric acid and the like into magnesite, forsterite, synthetic magnesium-calcium sand, dolomite and silicon fine powder serving as major raw materials, and premixing uniformly to form a scattered dry uniform aggregate; before use, adding 5-6 percent of liquid bonding agent; stirring into a fluid plastic state by using a forced stirrer; loading into a hopper for putting into a furnace; and rapidly shaking a furnace body till a material flows to positions required to be repaired naturally, wherein the sintering time is 15 minutes per 1-2 tons of materials.
Description
technical field [0001] The invention relates to a water-based converter large surface self-flowing material and a preparation method thereof, belonging to the technical field of converter repair and monolithic refractory materials. Background technique [0002] At present, the main ones that are widely used are asphalt / resin combined converter large surface self-flowing materials. Since more asphalt is added to the material, there are the following problems: 1) The sintering time is too long, usually 40-60 minutes; 2. ) Insufficient sintering may form an incompletely carbonized sandwich layer, which may cause splashing after tapping; 3) Toxic fumes are emitted during the sintering process, polluting the environment and endangering human health; 4) After the organic matter is burned out, the material has many pores and is dense Poor performance, resulting in materials not resistant to slag erosion, low strength, and short service life, usually only about 20 furnaces; [0003...
Claims
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Application Information
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