A kind of silicon carbon drainage agent and preparation method thereof

A drainage agent and silicon carbon technology, applied in the field of metallurgy, can solve the problems of low self-opening rate, over-sintering, high heat transfer coefficient, etc., and achieve the effect of improving self-opening rate, ensuring purity, and low thermal conductivity

Active Publication Date: 2017-12-22
ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the drainage agents used in domestic and foreign steel mills are mainly three types: silicon, chromium, and zirconium. After long-term use and feedback from users, there are the following problems: silicon has low refractoriness, large expansion coefficient, The self-opening rate is low; chromium can improve the refractoriness, but the material has a high heat transfer coefficient, which is prone to excessive sintering in the nozzle, and the molten steel is seriously polluted, which is unfavorable to the quality of fine steel; zirconium drainage agent Although the above problems can be solved, the cost is relatively high, and it cannot meet the current needs of energy saving and cost reduction of iron and steel enterprises

Method used

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  • A kind of silicon carbon drainage agent and preparation method thereof
  • A kind of silicon carbon drainage agent and preparation method thereof
  • A kind of silicon carbon drainage agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A silicon-carbon draining agent, consisting of the following raw materials in parts by weight: 60-80 parts of quartz sand with a particle size of 0.3-0.6 mm, 1-10 parts of phosphor flake graphite powder with a particle size of 325 mesh and a pass rate of 97%, and a particle size of 10-28 parts of 0.3-0.6mm silicon carbide, 1-5 parts of adhesive.

[0015] SiO in the quartz sand 2 The weight percentage is greater than or equal to 98%, Fe in quartz sand 2 o 3 The weight percentage is less than 0.3%.

[0016] The weight percentage of silicon carbide in the silicon carbide is greater than 90%.

[0017] The weight percentage of fixed carbon in the phosphor flake graphite powder is greater than 90%.

[0018] The mass percent of its active ingredient is: SiO 2 65-80%, SiC 8-28%, C 2.5-8%, and the rest are trace elements. The trace elements are iron oxide, calcium oxide and magnesium oxide.

[0019] The draining agent prepared from the raw materials in the present invent...

Embodiment 2

[0023] A silicon-carbon draining agent, consisting of the following raw materials in parts by weight: 65-75 parts of quartz sand with a particle size of 0.4-0.5 mm, 3-7 parts of phosphorus flake graphite powder with a particle size of 325 mesh and a pass rate of 97%, and a particle size of 15-23 parts of 0.4-0.5mm silicon carbide, 1-3 parts of adhesive.

[0024] SiO in the quartz sand 2 The weight percentage is greater than or equal to 98%, Fe in quartz sand 2 o 3 The weight percentage is less than 0.3%.

[0025] The weight percentage of silicon carbide in the silicon carbide is greater than 90%.

[0026] The weight percentage of fixed carbon in the phosphor flake graphite powder is greater than 90%.

[0027] The mass percent of its active ingredient is: SiO 2 70-75%, SiC 15-20%, C 4-7%, and the rest are trace elements. The trace elements are iron oxide, calcium oxide and magnesium oxide.

[0028] The draining agent prepared from the raw materials in the present invent...

Embodiment 3

[0032] A silicon-carbon draining agent, consisting of the following raw materials in parts by weight: 70 parts of quartz sand with a particle size of 0.4mm, 5 parts of phosphorus flake graphite powder with a particle size of 325 mesh and a pass rate of 97%, and silicon carbide with a particle size of 0.4mm 20 parts, 2 parts adhesive.

[0033] SiO in the quartz sand 2 The weight percentage is greater than or equal to 98%, Fe in quartz sand 2 o 3 The weight percentage is less than 0.3%.

[0034]The weight percentage of silicon carbide in the silicon carbide is greater than 90%.

[0035] The weight percentage of fixed carbon in the phosphor flake graphite powder is greater than 90%.

[0036] The mass percent of its active ingredient is: SiO 2 72%, SiC 18%, C 5%, and the rest are trace elements. The trace elements are iron oxide, calcium oxide and magnesium oxide.

[0037] The draining agent prepared from the raw materials in the present invention has no pollution to molte...

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Abstract

The invention discloses a silicon-carbon drainage agent and a preparation method thereof, and relates to the field of metallurgy. The drainage agent is composed of, by weight, 60-80 parts of quartz sand with the particle size being 0.3-0.6 mm, 1-10 parts of phosphorus slice graphite powder with the particle size being 325 meshes and the passing rate being 97%, 10-28 parts of silicon carbide with the particle size being 0.3-0.6 mm and 1-5 parts of binding agent. The preparation method of the silicon-carbon drainage agent comprises the following steps of dry mixing, wet mixing and drying. Various raw materials used for preparing the silicon-carbon drainage agent do not pollute the environment and molten steel, no impurity can be introduced in the molten steel smelting process, the purity of the molten steel of fine steel is ensured, and the requirements for using of market quality goods and cleaner production are met. The drainage agent prepared through the method is stable in performance, good in liquidity, low in heat conductivity coefficient, good in penetration resistance at high temperatures, and the free opening rate of steel ladles is increased. On the premise that the product performance is not lowered, low-price materials are used for replacing high-grade materials, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a silicon-carbon drainage agent and a preparation method thereof. Background technique [0002] The ladle drainage agent is a refractory material with high temperature resistance, good thermal stability and strong corrosion resistance. It is used to fill the upper nozzle of the ladle during the steel pouring process to prevent the molten steel from entering the upper nozzle after the ladle is loaded with steel. The drainage agent can fall automatically when pouring, and then the molten steel flows into the tundish from the nozzle, which is a necessary refractory material to ensure the continuous casting production. [0003] At present, the drainage agents used in domestic and foreign steel mills are mainly three types: silicon, chromium, and zirconium. After long-term use and feedback from users, there are the following problems: silicon has low refractoriness, large expansion coefficie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/08B22D41/46
CPCB22D11/08B22D41/46
Inventor 慕永军慕润青闫橦楷
Owner ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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