CN109748285A - A kind of new process of low cost production calcium silicates - Google Patents
A kind of new process of low cost production calcium silicates Download PDFInfo
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- CN109748285A CN109748285A CN201711074283.4A CN201711074283A CN109748285A CN 109748285 A CN109748285 A CN 109748285A CN 201711074283 A CN201711074283 A CN 201711074283A CN 109748285 A CN109748285 A CN 109748285A
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- calcium
- bisulfite
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- silicates
- sulfite
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Abstract
A kind of new process of low cost production calcium silicates, it is characterized in that quartz sand, calcium sulfate and charcoal are placed in kiln reaction in furnace, the solid and sulfur dioxide of generation generate calcium silicates, calcium sulfite and calcium bisulfite through the following steps processing respectively: (1) it generates calcium silicates: will be added sulfuric acid after the solid dissolution of generation, precipitating filtering, washed, mashing, dry calcium silicates；(2) produce calcium sulfite: soda ash, which is added in bisulfite calcium solution, generates calcium sulfite solution, and a part is concentrated and dried to obtain calcium sulfite；After a part is reacted with the sulfur dioxide generated, bisulfite calcium solution is generated, reuse produces calcium sulfite；(3) produce calcium bisulfite: soda ash, which is added in bisulfite calcium solution, generates calcium sulfite solution, after being reacted with the sulfur dioxide of generation, crystallized, dry calcium bisulfite.Process flow of the invention is simple, coproduction multiple product, and production cost is low, has biggish application and popularization value.
Description
Technical field
The present invention relates to a kind of new processes of low cost production calcium silicates.
Background technique
Calcium silicates also known as light silicon dioxide are the good reinforcing agents of rubber；Also serve as lubricant, insulating materials and plastics
The filler material or white pigment of product, paper, paint, textile etc..Currently, the tradition of domestic and international most common production calcium silicates
Method is the precipitation method, which needs to consume a large amount of soda ash and sulfuric acid, higher cost.
Summary of the invention
The purpose of the present invention is to provide a kind of new process of low cost production calcium silicates, which reduces production
The cost of calcium silicates.
The new process of a kind of low cost production calcium silicates of the invention, it is characterised in that mix quartz sand, calcium sulfate and charcoal
It is put into kiln and is reacted after conjunction, the calcium silicates solid and sulfur dioxide of generation generate silicic acid after the following steps are handled respectively
Calcium, calcium sulfite and calcium bisulfite: (1) it generates calcium silicates: the calcium silicates solid of generation is pressed to 100: 180~488 weight
It is dissolved than water is added, obtains calcium silicates liquid, after precipitating filtering, the sulfuric acid that calcium silicates liquid is 98% with concentration presses 13
~19: 1 volume ratio reacts 1~4h at 70~100 DEG C, is washed after reaction, the material after washing is beaten,
Finally dry out calcium silicates；(2) it produces calcium sulfite: soda ash is added in bisulfite calcium solution by 1: 1 molar ratio, generate
Calcium sulfite, the sulfur dioxide of a part of calcium sulfite solution and generation are produced in calcium sulfite solution, a part of concentrated drying
By 1: 1 molar ratio, after being reacted at 20~50 DEG C, bisulfite calcium solution is generated, then reacts reuse production with soda ash
Calcium sulfite.(3) it produces calcium bisulfite: soda ash being added in bisulfite calcium solution by 1: 1 molar ratio, two with generation
Sulfur oxide presses 1: 1 molar ratio, after being reacted at 20~50 DEG C, generates supersaturated bisulfite calcium solution, crystallized, dry
It is dry to produce bisulfite calcium product.
Theoretical basis of the invention is:
Compared with existing technology, the present invention has the advantages that first is that production calcium silicates simultaneously, coproduction calcium sulfite, Asia
The products such as calcium bisulfate, calcium sulfate can be recycled after reaction process, and this reduces production cost recycling；Second is that without useless
Object discharge；Three utilize all risk insurance temperature horse-shoe flame furnace continuous sulphuric acid production calcium method waterglass.
Specific embodiment
The present invention is implemented as follows: by raw material quartz sand, calcium sulfate and carbon (crushing) according to SiO2: Na2SO4: C
The mixing of=100: 81.4: 6.5 ratios, it is continuous to put into shape of a hoof all risk insurance temperature kiln, 1420 DEG C~1450 DEG C of reaction temperature, continuously go out
Material, material obtain 3.5M, 29Be ' waterglass liquid through water quenching, dissolution.Bottom water 2.5L, pre-add water are added in the reaction kettle of 5L
Glass 0.075L is heated up to 86 DEG C, within 100 minutes time, while being uniformly added into water glass solution 1.163L and sulfuric acid
0.072L is added after 0.011L is carried out after reaction and adjusts pH value to 4.5 after acid.Silicon is made in the washed drying of resulting material
Sour calcium 348.1g (BET 185m2/g), solution obtain 235.14g calcium sulfate by being concentrated and dried.Wherein, calcium silicates is being generated
During, the calcium sulfate of recoverable is produced in the concentrated drying of cleaning solution after washing.
It generates calcium sulfite: soda ash is added in bisulfite calcium solution by 1: 1 molar ratio, it is molten to generate calcium sulfite
Calcium sulfite is produced in liquid, a part of concentrated drying, and a part of calcium sulfite solution and generation ground sulfur dioxide press 1: 1 mole
Than after being reacted at 20~50 DEG C, generating bisulfite calcium solution, then react reuse production calcium sulfite with soda ash.
Production calcium bisulfite: soda ash is added in bisulfite calcium solution by 1: 1 molar ratio, the titanium dioxide with generation
Sulphur presses 1: 1 molar ratio, after being reacted at 20~50 DEG C, generates supersaturated bisulfite calcium solution, crystallized, dry system
Bisulfite calcium product out.
Process flow of the invention is simple, production cost is low, has biggish application and popularization value.
Claims (1)
1. a kind of new process of low cost production calcium silicates, it is characterised in that be put into kiln after mixing quartz sand, calcium sulfate and charcoal
It is reacted in furnace, the calcium silicates solid and sulfur dioxide of generation generate calcium silicates, sulfurous acid after the following steps are handled respectively
Calcium and calcium bisulfite:
(1) it generates calcium silicates: water is added by 100: 180~488 weight ratio in the calcium silicates solid of generation and is dissolved, is obtained
Calcium silicates liquid, after precipitating filtering, the sulfuric acid that calcium silicates liquid and concentration are 98% presses 13~19: 1 volume ratio, in 70~
1~4h is reacted at 100 DEG C, is washed after reaction, the material after washing is beaten, finally dry out calcium silicates；
(2) it produces calcium sulfite: soda ash is added in bisulfite calcium solution by 1: 1 molar ratio, generate calcium sulfite solution,
Calcium sulfite is produced in a part of concentrated drying, and the sulfur dioxide of a part of calcium sulfite solution and generation presses 1: 1 molar ratio,
After being reacted at 20~50 DEG C, bisulfite calcium solution is generated, then reacts reuse production calcium sulfite with soda ash.
(3) it produces calcium bisulfite: soda ash being added in bisulfite calcium solution by 1: 1 molar ratio, the titanium dioxide with generation
Sulphur presses 1: 1 molar ratio, after being reacted at 20~50 DEG C, generates supersaturated bisulfite calcium solution, crystallized, dry system
Bisulfite calcium product out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711074283.4A CN109748285A (en) | 2017-11-05 | 2017-11-05 | A kind of new process of low cost production calcium silicates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711074283.4A CN109748285A (en) | 2017-11-05 | 2017-11-05 | A kind of new process of low cost production calcium silicates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109748285A true CN109748285A (en) | 2019-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711074283.4A Pending CN109748285A (en) | 2017-11-05 | 2017-11-05 | A kind of new process of low cost production calcium silicates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109748285A (en) |
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2017
- 2017-11-05 CN CN201711074283.4A patent/CN109748285A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190514 |
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| WD01 | Invention patent application deemed withdrawn after publication |