Method for preparing hydrated silica dioxide

A hydrated silica, water quenching technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of high-titanium blast furnace slag pollution, and achieve the effect of effective utilization, low cost, and environmental pollution

Inactive Publication Date: 2008-05-21
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, Panzhihua Iron and Steel has been committed to solving the environmental pollution problem of high-titanium blast furnace slag. The use of this raw material to realize the utilization of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dry the water-quenched blast furnace slag at a temperature of 110±5°C for 120 minutes to remove moisture from the sample. Put 100g of blast furnace water-quenched slag into a 1000mL beaker, slowly add 300mL of sulfuric acid solution (prepared from industrial sulfuric acid, the concentration is 40%), and keep stirring with a stirrer, control the reaction temperature at 40°C throughout the reaction process, and react for 90 Minutes, let it stand for about 1 to 5 minutes, and filter the solution.

[0020] Heat the filtrate to 80°C, keep it warm for about 10 minutes, and then cool it down, the silica crystallizes out, filter the solution, wash the filtrate with water, and dry the filtrate at 105±5°C to obtain industrial-grade quality hydrated dioxide The yield of silicon and silicon dioxide is 91.30%.

Embodiment 2

[0022] Dry the water-quenched high-titanium blast furnace slag at a temperature of 110±5°C for 120 minutes, remove the moisture in the sample, weigh 100g of the blast furnace water-quenched slag with a balance, put it into a 1000mL beaker, and slowly add 200mL of sulfuric acid solution (made from industrial sulfuric acid Preparation, the concentration is 40%), and constantly stir with a stirrer, control the reaction temperature at 30 ℃ during the whole reaction process, react for 120 minutes, stand for about 1 to 5 minutes, and filter the solution.

[0023] Heat the filtrate to 80°C, keep it warm for about 10 minutes, and then cool it down, the silica crystallizes out, filter the solution, wash the filtrate with water, and dry the precipitate at 105±5°C to obtain industrial grade High quality hydrated silica, the yield of silica is 91.67%.

Embodiment 3

[0025] Dry the water-quenched high-titanium blast furnace slag at a temperature of 110±5°C for 120 minutes, remove the moisture in the sample, weigh 100g of the blast furnace water-quenched slag with a balance, put it into a 1000mL beaker, and slowly add 500mL of sulfuric acid solution (made from industrial sulfuric acid Preparation, the concentration is 40%), and constantly stir with a stirrer, control the reaction temperature at 30 ℃ during the whole reaction process, react for 120 minutes, stand for about 1 to 5 minutes, and filter the solution.

[0026] Heat the filtrate to 80°C, keep it warm for about 10 minutes, and then cool it down, the silica crystallizes out, filter the solution, wash the filtrate with water, and dry the precipitate at 105±5°C to obtain industrial grade High quality hydrated silica, the yield of silica is 90.36%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method used for preparing hydrated silicon dioxide, in particular to a method for extracting the hydrated silicon dioxide from acid pickling of high titanium type water quenching blast furnace slag. The invention uses the high titanium type water quenching blast furnace slag as a raw material and uses inorganic acid to carry out the acid pickling; filter liquor is heated after filtering and then cooled so that the hydrated silicon dioxide is separated out, and the inorganic acid can employs industrial waste acid. The method of the invention comprehensively utilizes the high titanium type blast furnace slag produced during ironmaking production process, has simple technique, realizes effective utilization of valuable elements from the blast furnace slag, solves titanium white waste acid treatment and reduces the pollution of waste to environment at the same time.

Description

technical field [0001] The invention relates to a method for preparing hydrated silicon dioxide, in particular to a method for extracting hydrated silicon dioxide by acid leaching of high-titanium water-quenched blast furnace slag. Background technique [0002] The preparation method of hydrated silicon dioxide has two kinds at present, and a kind of method is to take sodium silicate (water glass) as raw material, reacts with sulfuric acid, obtains hydrated silicon dioxide product; Another kind of method takes silicon-containing substance as raw material, After being prepared into silicon tetrachloride, hydrated silicon dioxide is prepared through a series of complex processes such as oxidation and hydrolysis. Both methods are costly. [0003] The Panzhihua region is rich in vanadium-titanium magnetite resources, among which titanium reserves account for 95% of the country's titanium resources. During the beneficiation and blast furnace smelting of vanadium-titanium magnet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B33/12
Inventor 税必刚程晓哲杜剑桥罗建林陆平
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap