Foaming microcrystal material based on smelt slag and production process thereof

A technology of microcrystalline materials and production processes, applied in manufacturing tools, glass molding, glass manufacturing equipment, etc., can solve the problems of single type of smelting slag, low product added value, low comprehensive utilization level, etc., to save production time and The effect of energy consumption, increasing economic added value, huge social and economic benefits

Inactive Publication Date: 2018-08-24
上海瑞由思环保节能科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to statistics, the total annual discharge of smelting slag in my country is about 115 million tons, and the comprehensive utilization rate is about 91.5%. Although most of them are utilized, their comprehensive utilization level is low, usually after water quenching or natural cooling , and then used as raw materials for the production of cement, brick making, road construction, backfilling, etc., the added value of the product is very low, and the types of smelting slag used in the prior art are relatively single, and the proportion of use is generally less than 50%. Process report on the production of inorganic foamed microcrystalline materials with smelting slag as the main raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Red mud is the industrial solid waste discharged when the aluminum industry extracts alumina. Generally, every 1 ton of alumina is produced on average, and 0.6-2.0 tons of red mud is incidentally produced. The annual production of red mud in the world is about 70 million tons. my country is the world's largest The four major alumina producing countries produce more than 30 million tons of red mud every year. The chemical composition of red mud is complex, with the characteristics of high calcium, high silicon, and low iron. Its main chemical composition includes: 20-23% SiO2 in terms of mass percentage 2 , 2~8% CaO, 5~7% Al 2 o 3 , 7-10% Fe 2 o 3 , 2~10%Na 2 O, 2.5~3.0%TiO 2 , except that the silicon dioxide content is low, the rest of the chemical composition is very close to the microcrystalline foaming material.

[0032] Using smelting slag red mud as the main raw material to prepare the foamed microcrystalline material based on smelting slag includes the follow...

Embodiment 2

[0038] Copper slag is the slag produced in the process of copper smelting, which is a kind of non-ferrous metal slag. The waste slag discharged from copper smelting by reverberatory furnace method is reverberatory furnace copper slag, and the waste slag discharged from blast furnace copper smelting is blast furnace copper slag. , The reverberatory furnace method produces 10-20t slag, and the blast furnace method produces 50-100t slag. The chemical composition of copper slag includes: 30-40% SiO in terms of mass percentage 2 , 5-10% CaO, 1-5% NaO, 2-4% Al 2 o 3 In addition, there are a large amount of iron 27-35% and a small amount of zinc 2-3%; the main mineral phase is fayalite (which is 90% FeSiO 4 ), followed by magnetite, glass and sulfide.

[0039] Iron slag is the solid waste produced in the process of ironmaking, and 0.3-0.9t of iron slag is discharged per 1 ton of pig iron smelting. The chemical composition of iron slag includes: 33-43% CaO, 6-10% MgO, 30-40% %SiO ...

Embodiment 3

[0043] Silico-manganese slag is also called silicomanganese smelting slag, which is a kind of industrial waste slag discharged when smelting silicon-manganese alloy. Generally, 1.2t of silicon-manganese slag will be produced for every 1t of silicon-manganese alloy produced. The silicon-manganese slag is mainly composed of CaSiO 3 、CaAl 2 o 4 , Ca 2 al 2 SiO 7 , Ca 2 MgSi 2 o 7 and MgSiO 3 And other mineral composition, belongs to the acid slag system. Casting slag is the mixture of molten steel and slag left after continuous casting or ingot casting of molten steel in the ladle. It is an alkaline reduction slag with an average alkalinity of 4.09. The main chemical components include: 45-55% in terms of mass percentage CaO, 5-15% MgO, 10-15% SiO 2 , 15-25% Al 2 o 3 , can be used as a raw material for introducing basic oxides.

[0044] Using silicomanganese slag and casting residue acid-base slag as the main raw materials to prepare the microcrystalline foamed materi...

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Abstract

The invention discloses a foaming microcrystal material based on smelt slag and a production process thereof. In the process, with the smelt slag as a main raw material with addition of natural minerals and additives, the foaming microcrystal material is produced through steps of water quenching, foaming and then a crystallization reaction. The process can utilize the industrial wastes, smelt slag, as most as possible and can increase the economic additional value and reduce production cost of the product at the same time of treating the slag. The foaming microcrystal material is better than similar inorganic foaming products, such as foam glass, foamed ceramic and the like, in the prior art in aspects of strength, heat conductivity, flame retarding performance and the like, wherein additional value is increased by more than 10 times than that in conventional processes. The foaming microcrystal material is used in various industrial and building heat preservation fields as a high-quality fireproof and heat preservation material, has positive promotion effect in the field of environmental protection and energy saving and emission reduction, and has huge social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of inorganic foaming materials, and relates to a process for producing foamed microcrystalline materials using industrial smelting slag as a main raw material, in particular to a foaming microcrystalline material based on smelting slag and a production process thereof. Background technique [0002] Smelting slag refers to various solid wastes produced in the production process of the metallurgical industry, mainly refers to blast furnace slag and steel slag produced in the process of iron and steel smelting, and various non-ferrous metal slags produced in the process of non-ferrous metal smelting, such as copper slag, lead slag, zinc slag, etc. slag, nickel slag, etc., red mud discharged from the extraction of alumina from bauxite, and a small amount of iron oxide slag produced in the rolling process. 0.3-0.9t of iron slag is discharged per 1t of pig iron smelting, 0.1-0.3t of steel slag is discharged per 1t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C11/00C03C10/00C03C6/10C03C1/04C03B19/08C03B32/02
CPCC03B19/08C03B32/02C03C1/002C03C1/04C03C10/0063C03C11/007
Inventor 朱春江姚春辉孙灵李菊芳
Owner 上海瑞由思环保节能科技发展有限公司
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