Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for reducing celestine in rotary hearth furnace to produce strontium sulfide

A technology of celestite and strontium sulfide, applied in the direction of magnesium/calcium/strontium/barium sulfide/polysulfide, energy input, etc., can solve the problems of low recovery rate, high cost, poor economic benefit, etc., and achieve high SrS production capacity , fast reduction reaction and high degree of control

Inactive Publication Date: 2017-04-26
JIANGSU UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current process has disadvantages such as poor reduction effect, low recovery rate, high cost, and poor economic benefit.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for reducing celestine in rotary hearth furnace to produce strontium sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Will contain 65.6wt% SrSO 4 , 11.5wt% CaSO 4 , 8.2wt% CaCO 3 and 12.6 wt% BaSO 4 The composed celestite concentrate powder is ground in a ball mill so that its particle size reaches -100 mesh and is greater than 80%; the commercially available anthracite coal powder (0.2wt% S, 8.5wt% ash and 91.2wt% fixed carbon content) is sieved to make it The particle size reaches -100 mesh greater than 50%. Celestite concentrate powder and anthracite are batched and weighed according to the weight ratio of 85:15, and continuously added to the ball mill for mixing and grinding for 50 minutes, with a material-to-ball ratio of 10:1. Put the mixed raw materials into the sand mixer and mix them mechanically. At the same time, add 1.5wt% bentonite, 5wt% water and 2wt% syrup binder to make a wet material. The overall moisture content of the wet material should be controlled At 8 wt%. Afterwards, the wet material is continuously added to a double-roller ball press and pressed into elli...

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 production process for reducing celestine concentrate pellets with carbon in a rotary hearth furnace to produce strontium sulfide. The process comprises the following steps: subjecting celestine concentrate powder and anthracite duff or petroleum coke powder, used as main raw materials, to batching according to a certain ratio, weighing and mixing, adding a binder and water and carrying out blending so as to obtain a wet material; pressing the wet material with a ball press machine to obtain cold-bonded pellets with certain sizes; drying the pellets in a chain grate, then conveying the dried pellets to the rotary hearth furnace with a highest reduction temperature of 1200 to 1300 DEG C to convert strontium sulfate in celestine into strontium sulfide; and discharging the reduced hot pellets out from the rotary hearth furnace and directly quenching the hot pellets in a water leaching pool, wherein the waste heat of the pellets can be used for increasing water temperature so as to facilitate acceleration of a series of chemical reactions for subsequent preparation of strontium carbonate. The process for production of strontium sulfide via the rotary hearth furnace has the advantages of simple operation, high efficiency, great output, low cost, no pollution, etc. Detection results show that the conversion rate of strontium sulfate in celestine reaches 95% or above through reduction of celestine with carbon in the rotary hearth furnace.

Description

technical field [0001] The invention relates to a production process for producing strontium sulfide by reducing celestite concentrate pellets with carbon in a rotary low furnace. Background technique [0002] Strontium carbonate is an important inorganic chemical raw material, mainly used in the preparation of electronics, communications, ceramics, metallurgy, fireworks, glass bulbs of color picture tubes, magnetic materials and other strontium salts. In addition, strontium carbonate is also widely used in the fields of computer and medicine. [0003] At present, the main preparation methods of strontium carbonate include celestite carbon reduction carbonization method, celestite carbon reduction-ammonium bicarbonate precipitation method, celestite carbon reduction pure carbon dioxide carbonization method, mixed ore two-stage conversion method, strontite acid soluble-ammonium bicarbonate precipitation method Precipitation method, smithsonite calcination-carbonization metho...

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): C01B17/44
CPCC01B17/44Y02P20/129
Inventor 郭长庆金波曹杰瑞
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com