Refractory castable for submerged-arc furnace for smelting ferro-nickel and preparation method of refractory castable

A technology of refractory castables and submerged arc furnaces, which is applied in the field of unshaped refractory materials, can solve problems such as unsatisfactory lining life, and achieve the effects of low construction labor intensity, good fluidity, and excellent nickel-iron corrosion resistance

Inactive Publication Date: 2012-09-19
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of unsatisfactory lining service life of the refractory material of the submerged arc furnace for producing nickel-iron alloys, and prolong the service life of the working lining of the bottom of the submerged arc furnace and the low wall, the invention provides a ferronickel smelting Refractory castable for submerged arc furnace and preparation method thereof

Method used

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  • Refractory castable for submerged-arc furnace for smelting ferro-nickel and preparation method of refractory castable
  • Refractory castable for submerged-arc furnace for smelting ferro-nickel and preparation method of refractory castable

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Effect test

Embodiment 1

[0016] By weight ratio, get 5 parts of chromium oxide powder with a particle size less than 0.074mm, 4 parts of iron red powder with a particle size less than 0.074mm, and 10 parts of magnesia-chromium spinel fine powder with a particle size less than 0.074mm. 76 parts of fused magnesia with a particle size of less than 8 mm, 3 parts of calcium aluminate cement fine powder with a particle size of less than 0.088 mm, 2 parts of silica micropowder with a particle size of less than 5 microns, 0.18 parts of sodium hexametaphosphate and 0.2 parts The sodium citrate is fully mixed evenly to obtain the finished product.

[0017] Take the finished product to make a sample, and test its performance, see the attached table.

Embodiment 2

[0019] According to the weight ratio, get 6 parts of chromium oxide powder with a particle size less than 0.074mm, 4 parts of iron red powder with a particle size less than 0.074mm, and 12 parts of magnesia-chromium spinel fine powder with a particle size less than 0.074mm. 73 parts of fused magnesia with a particle size of less than 8 mm, 3 parts of calcium aluminate cement fine powder with a particle size of less than 0.088 mm, 2 parts of silica fine powder with a particle size of less than 5 microns, 0.18 parts of sodium hexametaphosphate and 0.2 parts The sodium citrate is fully mixed evenly to obtain the finished product.

[0020] Take the finished product to make a sample, and test its performance, see the attached table.

Embodiment 3

[0022] By weight, get 4 parts of chromium oxide powder with a particle size less than 0.074mm, 4 parts of iron red powder with a particle size less than 0.074mm, and 9 parts of magnesia-chrome spinel fine powder with a particle size less than 0.074mm. 80 parts of fused magnesia with a particle size of less than 8 mm, 2 parts of calcium aluminate cement fine powder with a particle size of less than 0.088 mm, 1 part of silica fine powder with a particle size of less than 5 microns, 0.18 parts of sodium hexametaphosphate and 0.2 parts The sodium citrate is fully mixed evenly to obtain the finished product.

[0023] Get the finished products of three embodiments and make sample, detect its performance and see attached table.

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Abstract

Refractory castable for a submerged-arc furnace for smelting ferro-nickel comprises fused magnesia, fine magnesia-chrome spinel powder, a bonding agent, chromium oxide powder, iron oxide red powder, silicon oxide micro-powder and an additive according to weight ratio. The bonding agent is calcium aluminate cement with aluminum oxide content of 55%, the additive consists of a water reducer and a retarder, and the water reducer is sodium hexametaphosphate or sodium tripolyphosphate. The special refractory castable for the submerged-arc furnace for smelting the ferro-nickel from laterite has fine flowability when used for vibratory pouring construction, a cast body with dense and uniform organizational structure is easily formed, the refractory castable has the advantages of fine high-temperature resistance, excellent ferro-nickel corrosion resistance, long service life and the like when used as a working lining, which contacts with ferro-nickel melt, of a furnace bottom of the submerged-arc furnace and a low wall portion, and effects of improving the running rate of the submerged-arc furnace and reducing consumption of refractory materials, energy consumption and production cost are obvious.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a refractory castable for a submerged arc furnace for smelting ferronickel and a preparation method thereof. Background technique [0002] Nickel is an important strategic material. Since 2005, China has replaced Japan as the country with the largest nickel consumption in the world. At present, high-grade nickel sulfide ore resources are becoming increasingly depleted, while low-grade nickel oxide ore (laterite nickel ore), which accounts for 70% of nickel reserves, is rich in resources and low in mining costs. It can be used to produce nickel oxide, nickel matte, ferronickel, etc. intermediate product. Therefore, in recent years, the utilization ratio of laterite nickel ore resources has shown a rapid upward trend. The "Major Industrial Technology Development Project" organized and implemented by my country in 2008 included the development of "key technologies for efficient ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 廖桂华丁达富张玫张新爱曹钦存
Owner LUOYANG INST OF SCI & TECH
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