Method for producing slag forming agent contg. high calcium and low silicone by corundum arc furnace

An electric arc furnace and slag-forming agent technology, applied in the field of smelting, can solve the problems of high content of harmful impurities, affecting the production of high-quality steel, unstable performance indicators, etc., and achieve the effects of thorough chemical reaction, stable performance indicators, and strong activity.

Inactive Publication Date: 2006-09-13
GUIZHOU DAZHONG NO 7 GRINDING WHEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The high-calcium and low-silicon slagging agent used in the iron and steel metallurgy industry is traditionally produced by calcining in a rotary kiln, and the raw materials are raw bauxite and limestone. The main problem is: due to the rotation of the kiln body, the high temperature movement of the material in the kiln , coupled with the continuous input of raw materials, the temperature difference in the kiln is large (up to about 500 ° C), which makes the product chemical stability poor and performance indicators u

Method used

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  • Method for producing slag forming agent contg. high calcium and low silicone by corundum arc furnace

Examples

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Example Embodiment

[0013] Example 1:

[0014] Referring to the accompanying drawings, a method for producing high-calcium and low-silicon slag-forming agent with corundum electric arc furnace, comprising the following steps:

[0015] (1) batching: the raw material is crushed to 2-15mm, then mixed batching according to the following proportions, slaked bauxite 4200kg, quicklime 5300kg, calcite 4kg, coke 1kg;

[0016] (2) Smelting: the raw materials are put into the 3000KVA corundum in stages and poured into the electric arc furnace, 1000kg is put into the electric arc furnace before the furnace is started, and the remaining materials are put in 3 times on average. When the material layer is completely melted, the material surface turns red and forms a soft cover, the furnace can be stopped;

[0017] (3) pour the furnace, pick up the package and cool;

[0018] (4) Classification: the unqualified crystals are crushed to 0-15mm for later use (after reaching a certain amount, they are returned to b...

Example Embodiment

[0020] Example 2:

[0021] Referring to the accompanying drawings, a method for producing high-calcium and low-silicon slag-forming agent with corundum electric arc furnace, comprising the following steps:

[0022] (1) batching: the raw material is crushed to 2-15mm, then mixed batching according to the following proportions, slaked bauxite 4300kg, quicklime 5200kg, calcite 3kg, coke 2kg;

[0023] (2) Smelting: The raw materials are put into the 3000KVA corundum by stages and poured into the electric arc furnace, 2000kg is put in before the furnace is started, and the remaining materials are put in 4 times on average, after the current and voltage are stabilized for 20-30min, 2000kg each time. When the material layer is completely melted, the material surface turns red and forms a soft cover, the furnace can be stopped;

[0024] (3) pour the furnace, pick up the package and cool;

[0025] (4) Classification: the unqualified crystals are crushed to 0-15mm for later use (after...

Example Embodiment

[0027] Example 3:

[0028] Referring to the accompanying drawings, a method for producing high-calcium and low-silicon slag-forming agent with corundum electric arc furnace, comprising the following steps:

[0029] (1) batching: the raw material is crushed to 2-15mm, then mixed batching according to the following proportions, slaked bauxite 4500kg, quicklime 5000kg, calcite 3kg, coke 2kg;

[0030] (2) Smelting: The raw materials are put into the 3000KVA corundum and poured into the electric arc furnace in stages, and 3000kg is put into the electric arc furnace before the furnace is started. The remaining materials are put in 3 times on average. When the material layer is completely melted, the material surface turns red and forms a soft cover, the furnace can be stopped;

[0031] (3) pour the furnace, pick up the package and cool;

[0032] (4) Classification: the unqualified crystals are crushed to 0-15mm for later use (after reaching a certain amount, they are returned to b...

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Abstract

The invention discloses a method to make high calcium low silicon fluxing medium by corundum arc furnace that includes the following steps: mixture that crushing raw material and mixing 42-45% wrought aluminium bauxite, 48%-53% calcium oxide, 3-4% calcite and 1-2% coke; melting that adding the raw material into furnace adding 10-30% of the total quantity before blowing on, and the rest would be added for 3-4 times after current and voltage stabilizing for 20-30min, after the material totally melted, and soft cover is formed, the furnace could be shut down; turning down, fetching, and cooling; classifying; taking crashing, testing, packaging, storing to the qualified product. The invention has good chemical stability, high CaO content, strong activity, good performance.

Description

technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a method for producing a high-calcium-low-silicon slagging agent. Background technique [0002] The high-calcium and low-silicon slagging agent used in the iron and steel metallurgy industry is traditionally produced by calcining in a rotary kiln, and the raw materials are raw bauxite and limestone. The main problem is: due to the rotation of the kiln body, the high-temperature movement of the material in the kiln , coupled with the continuous input of raw material, the temperature difference in the kiln is large (up to about 500 ° C), which makes the product chemical stability poor and the performance index unstable; CaO, Al 2 o 3 Melting begins at 1200°C. When the furnace temperature exceeds 1400°C, the kiln is prone to clogging, and often the kiln has to be shut down for cleaning after one week of production; the effect of S and P removal is poor (S and P removal...

Claims

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Application Information

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IPC IPC(8): C21C7/00
Inventor 牟方勇濮江斌
Owner GUIZHOU DAZHONG NO 7 GRINDING WHEEL
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