CN109650428A - A method of lime and desulfurizing agent are produced simultaneously using carbide slag - Google Patents
A method of lime and desulfurizing agent are produced simultaneously using carbide slag Download PDFInfo
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- CN109650428A CN109650428A CN201910113827.6A CN201910113827A CN109650428A CN 109650428 A CN109650428 A CN 109650428A CN 201910113827 A CN201910113827 A CN 201910113827A CN 109650428 A CN109650428 A CN 109650428A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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Abstract
The present invention provides a kind of methods for producing lime and desulfurizing agent simultaneously using carbide slag, carbide slag slurries obtain calcium carbide slag filter material after concentration basin concentration after decanter centrifuge is dehydrated, calcium carbide slag filter material is in drying, after grader separation, after the dry slag I of coarse-particle size fraction calcium carbide is ground and the dry mixing of slag III system of fine grain component calcium carbide arrives desulfurizing agent product, the middle dry slag II of fraction calcium carbide is after calcining pressure ball, obtain ellipsoid lime product, the present invention is both by cleaning to carbide slag slurries, grader separates the purity that ensure that product lime, the impurity carbide slag separated again using carbide slag prepares by-product desulfurizing agent, it is dried simultaneously using the tail gas that lime burning process generates into the calcium carbide slag filter material before grader, the calcareous resource in carbide slag is effectively utilized, avoid pollution of the carbide slag to environment, realize the resource recycling of carbide slag It utilizes, meets the theory of economic development and environment protection coordinated development, there is prospects for commercial application.
Description
Technical field
It the present invention relates to the use of carbide slag and prepare lime and desulfurizing agent field more particularly to a kind of utilization carbide slag while life
The method for producing lime and desulfurizing agent.
Background technique
Carbide slag is reluctant industrial residue, and country's carbide slag is at present mainly for the production of cement, it may also be used for raw
The building materials such as carbonated lime brick, flyash brick, interior decoration are produced, there are also produce on a small quantity for industrially desulfurized, production calcium carbonate, calcium sulfate etc.
Product.But the production of cement and market are influenced very big by countries and regions economic environment factor.Since carbide slag generates enormous amount,
The sluggish market of manufacture of cement and sale directly constrain the consumption of carbide slag and the sustainable development of chlor-alkali enterprises.
There are mainly two types of the patented technologies of the lime of carbide slag production at present, and one is do not carry out removal of impurities production stone to carbide slag
Ash influences the quality of lime containing impurity such as silicon, iron, aluminium, magnesium in carbide slag slurries；Another kind is regenerated to after carbide slag removal of impurities
Lime is produced, but does not propose how the impurity carbide slag isolated will be handled, is not implemented and carbide slag is fully utilized.
How using the calcareous resource formation business cycle in carbide slag, pollution of the carbide slag to environment is avoided, while again
The impurity carbide slag that carbide slag can be made full use of to isolate in calcareous remanufacture lime realizes the complete benefit to carbide slag
With being badly in need of a kind of economical and practical method to realize the resource utilization of carbide slag.
Summary of the invention
The present invention provides a kind of methods for producing lime and desulfurizing agent simultaneously using carbide slag, and calcium carbide is effectively utilized
Calcareous resource in slag forms business cycle, while carbide slag can be made full use of to isolate in calcareous remanufacture lime again
Impurity carbide slag realizes the resource utilization to carbide slag.
The technical scheme is that realized by measure once: it is a kind of to utilize carbide slag while producing lime and taking off
The method of sulphur agent, which comprises the following steps:
A method of lime and desulfurizing agent are produced simultaneously using carbide slag, which comprises the following steps:
The carbide slag slurries I of solid content 6wt%-15wt% are sent into concentration basin by step 1, obtain solid content 21wt%-
The carbide slag slurries II of 30wt%；
Step 2, the carbide slag slurries II are dehydrated through decanter centrifuge, obtain the carbide slag of solid content 55wt%-65wt%
Filtrate；
Step 3, the calcium carbide slag filter material are under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates
It is dry, obtain the dry slag of calcium carbide of solid content 98wt% or more；
Step 4, the dry slag of the calcium carbide are separated through grader, isolate the dry slag I of calcium carbide, the dry slag II of calcium carbide and the dry slag of calcium carbide
III, the dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤ 200 μm, the dry slag of calcium carbide
III partial size Φ3<30μm；
The dry slag I of step 5, the calcium carbide is ground to partial size Φ through flour mill4≤ 75 μm, obtain the dry slag IV of calcium carbide；
Step 6 mixes the dry slag IV of calcium carbide that step 5 obtains and the dry slag III of calcium carbide that step 4 obtains, and send to desulfurizing agent powder
Feed bin obtains desulfurizing agent product；
Step 7 calcines the dry slag II of the calcium carbide that step 4 obtains through calcining kiln at 900 DEG C -1200 DEG C, obtains
Lime powder, calcium oxide content >=90% in the lime powder；
Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains ellipsoid lime product.
Further, the solid content of carbide slag slurries I is 8wt%-12wt% in the step 1.
Further, the solid content of carbide slag slurries I is 8wt% in the step 1.
Further, the solid content of calcium carbide slag filter material is 58wt%-62wt% in the step 2.
Further, the solid content of calcium carbide slag filter material is 58wt% in the step 2.
Further, the solid content of calcium carbide slag filter material is 62wt% in the step 2.
Further, the solid content of carbide slag slurries II is 30wt% in the step 1.
Further, the drying in the step 3 is pneumatic conveying drying.
The beneficial effects of the present invention are: provide it is a kind of using carbide slag while the method that produces lime and desulfurizing agent, both
By cleaning to carbide slag slurries, grader separates the purity that ensure that product lime, and separates impurity electricity using carbide slag
Rock ballast prepares by-product desulfurizing agent, while being dried using the tail gas that lime burning process generates and being filtered into the carbide slag before grader
The calcareous resource in carbide slag is effectively utilized in cake, avoids carbide slag to the pollution of environment, realizes that the recycling of carbide slag is followed
Ring utilizes, and meets the theory of economic development and environment protection coordinated development, has prospects for commercial application.
Detailed description of the invention
Fig. 1 is a kind of method and process flow chart for producing lime and desulfurizing agent simultaneously using carbide slag of the present invention
Specific embodiment
The present invention is described further below with reference to embodiment:
Embodiment 1: as shown in Fig. 1, a method of lime and desulfurizing agent being produced simultaneously using carbide slag, including following
Step: the carbide slag slurries I of solid content 15wt% are sent into concentration basin by step 1, obtain the carbide slag slurries II of solid content 30wt%；
Step 2, the carbide slag slurries II are dehydrated through decanter centrifuge, obtain the calcium carbide slag filter material of solid content 65wt%；It is step 3, described
Calcium carbide slag filter material is dry under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates, obtains solid content
The dry slag of the calcium carbide of 99wt%；Step 4, the dry slag of the calcium carbide are separated through grader, isolate dry II and of slag of the dry slag I of calcium carbide, calcium carbide
The dry slag III of calcium carbide, the dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤200μm；Step
5, it is 75 μm that the dry slag I of the calcium carbide, which is ground to partial size Φ 4 through flour mill, obtains the dry slag IV of calcium carbide；Step 6 obtains step 5
The dry slag III of the calcium carbide that the dry slag IV of calcium carbide and step 4 obtain mixes, and send to desulfurizing agent filler bin, obtains desulfurizing agent product；Step
Rapid 7, the dry slag II of the calcium carbide that step 4 obtains is calcined at 1200 DEG C through calcining kiln, obtains lime powder, the lime
Calcium oxide content is 92% in powder；Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains the production of ellipsoid lime
Product.
Embodiment 2: a method of lime and desulfurizing agent are produced simultaneously using carbide slag, comprising the following steps: step 1,
The carbide slag slurries I of solid content 6wt% are sent into concentration basin, obtain the carbide slag slurries II of solid content 21wt%；Step 2, the electricity
Rock ballast slurry II is dehydrated through decanter centrifuge, obtains the calcium carbide slag filter material of solid content 55wt%；Step 3, the calcium carbide slag filter material exist
Dry under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates, the calcium carbide for obtaining solid content 98wt% is dry
Slag；Step 4, the dry slag of the calcium carbide are separated through grader, isolate the dry slag I of calcium carbide, the dry slag II of calcium carbide and the dry slag III of calcium carbide, described
The dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤ 200 μm, dry III partial size of slag of calcium carbide
Φ3<30μm；The dry slag I of step 5, the calcium carbide is ground to partial size Φ through flour mill4It is 74 μm, obtains the dry slag IV of calcium carbide；Step 6,
The dry slag IV of calcium carbide that step 5 obtains and the dry slag III of the calcium carbide that step 4 obtains are mixed, send to desulfurizing agent filler bin, obtains
Desulfurizing agent product；Step 7 calcines the dry slag II of the calcium carbide that step 4 obtains through calcining kiln at 900 DEG C, obtains lime
Powder, calcium oxide content is 90% in the lime powder；Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains
Ellipsoid lime product.
Embodiment 3: a method of lime and desulfurizing agent are produced simultaneously using carbide slag, comprising the following steps: step 1,
The carbide slag slurries I of solid content 8wt% are sent into concentration basin, obtain the carbide slag slurries II of solid content 23wt%；Step 2, the electricity
Rock ballast slurry II is dehydrated through decanter centrifuge, obtains the calcium carbide slag filter material of solid content 58wt%；Step 3, the calcium carbide slag filter material exist
Dry under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates, the calcium carbide for obtaining solid content 98wt% is dry
Slag；Step 4, the dry slag of the calcium carbide are separated through grader, isolate the dry slag I of calcium carbide, the dry slag II of calcium carbide and the dry slag III of calcium carbide, described
The dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤ 200 μm, dry III partial size of slag of calcium carbide
Φ3<30μm；The dry slag I of step 5, the calcium carbide is ground to partial size Φ through flour mill4It is 75 μm, obtains the dry slag IV of calcium carbide；Step 6,
The dry slag IV of calcium carbide that step 5 obtains and the dry slag III of the calcium carbide that step 4 obtains are mixed, send to desulfurizing agent filler bin, obtains
Desulfurizing agent product；Step 7 calcines the dry slag II of the calcium carbide that step 4 obtains through calcining kiln at 1000 DEG C, obtains lime
Powder, calcium oxide content is 90% in the lime powder；Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains
Ellipsoid lime product.
Embodiment 4: a method of lime and desulfurizing agent are produced simultaneously using carbide slag, comprising the following steps: step 1,
The carbide slag slurries I of solid content 12wt% are sent into concentration basin, obtain the carbide slag slurries II of solid content 26wt%；Step 2, the electricity
Rock ballast slurry II is dehydrated through decanter centrifuge, obtains the calcium carbide slag filter material of solid content 62wt%；Step 3, the calcium carbide slag filter material exist
Dry under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates, the calcium carbide for obtaining solid content 99wt% is dry
Slag；Step 4, the dry slag of the calcium carbide are separated through grader, isolate the dry slag I of calcium carbide, the dry slag II of calcium carbide and the dry slag III of calcium carbide, described
The dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤ 200 μm, dry III partial size of slag of calcium carbide
Φ3<30μm；The dry slag I of step 5, the calcium carbide is ground to partial size Φ through flour mill4It is 75 μm, obtains the dry slag IV of calcium carbide；Step 6,
The dry slag IV of calcium carbide that step 5 obtains and the dry slag III of the calcium carbide that step 4 obtains are mixed, send to desulfurizing agent filler bin, obtains
Desulfurizing agent product；Step 7 calcines the dry slag II of the calcium carbide that step 4 obtains through calcining kiln at 1200 DEG C, obtains lime
Powder, calcium oxide content is 92% in the lime powder；Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains
Ellipsoid lime product.
Embodiment 5: a method of lime and desulfurizing agent are produced simultaneously using carbide slag, comprising the following steps: step 1,
The carbide slag slurries I of solid content 10wt% are sent into concentration basin, obtain the carbide slag slurries II of solid content 24wt%；Step 2, the electricity
Rock ballast slurry II is dehydrated through decanter centrifuge, obtains the calcium carbide slag filter material of solid content 60wt%；Step 3, the calcium carbide slag filter material exist
Dry under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates, the calcium carbide for obtaining solid content 99wt% is dry
Slag；Step 4, the dry slag of the calcium carbide are separated through grader, isolate the dry slag I of calcium carbide, the dry slag II of calcium carbide and the dry slag III of calcium carbide, described
The dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤ 200 μm, dry III partial size of slag of calcium carbide
Φ3<30μm；The dry slag I of step 5, the calcium carbide is ground to partial size Φ through flour mill4It is 75 μm, obtains the dry slag IV of calcium carbide；Step 6,
The dry slag IV of calcium carbide that step 5 obtains and the dry slag III of the calcium carbide that step 4 obtains are mixed, send to desulfurizing agent filler bin, obtains
Desulfurizing agent product；Step 7 calcines the dry slag II of the calcium carbide that step 4 obtains through calcining kiln at 1200 DEG C, obtains lime
Powder, calcium oxide content is 92% in the lime powder；Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains
Ellipsoid lime product.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag, which comprises the following steps:
The carbide slag slurries I of solid content 6wt%-15wt% are sent into concentration basin concentration by step 1, obtain solid content 21wt%-
The carbide slag slurries II of 30wt%；
Step 2, the carbide slag slurries II are dehydrated through decanter centrifuge, obtain the calcium carbide slag filter material of solid content 55wt%-65wt%；
Step 3, the calcium carbide slag filter material are dry under the high-temperature tail gas of high-temperature flue gas and calcining kiln that coal burner generates,
Obtain the dry slag of calcium carbide of solid content 98wt% or more；
Step 4, the dry slag of the calcium carbide are separated through grader, isolate the dry slag I of calcium carbide, the dry slag II of calcium carbide and the dry slag III of calcium carbide, institute
State the dry I partial size Φ of slag of calcium carbide1> 200 μm, the dry II 30 μm≤Φ of partial size of slag of calcium carbide2≤ 200 μm, dry III partial size of slag of calcium carbide
Φ3<30μm；
The dry slag I of step 5, the calcium carbide is ground to partial size Φ through flour mill4≤ 75 μm, obtain the dry slag IV of calcium carbide；
Step 6 mixes the dry slag IV of calcium carbide that step 5 obtains and the dry slag III of calcium carbide that step 4 obtains, and send to desulfurizing agent powder
Storehouse obtains desulfurizing agent product；
Step 7 calcines the dry slag II of the calcium carbide that step 4 obtains through calcining kiln at 900 DEG C -1200 DEG C, obtains lime
Powder, calcium oxide content >=90% in the lime powder；
Step 8 passes through the lime powder to roll-in ball machine pressure ball, obtains ellipsoid lime product.
2. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as described in claim 1, which is characterized in that institute
The solid content for stating carbide slag slurries I in step 1 is 8wt%-12wt%.
3. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as claimed in claim 2, which is characterized in that institute
The solid content for stating carbide slag slurries I in step 1 is 8wt%.
4. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as described in claim 1, which is characterized in that institute
The solid content for stating calcium carbide slag filter material in step 2 is 58wt%-62wt%.
5. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as claimed in claim 4, which is characterized in that institute
The solid content for stating calcium carbide slag filter material in step 2 is 58wt%.
6. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as claimed in claim 4, which is characterized in that institute
The solid content for stating calcium carbide slag filter material in step 2 is 62wt%.
7. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as described in claim 1, which is characterized in that institute
The solid content for stating carbide slag slurries II in step 1 is 30wt%.
8. a kind of method for producing lime and desulfurizing agent simultaneously using carbide slag as described in claim 1, which is characterized in that step
The drying of rapid 3 weight is pneumatic conveying drying.
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Cited By (4)
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| CN112426872A (en) * | 2020-11-30 | 2021-03-02 | 天津中材工程研究中心有限公司 | Method for improving purity of desulfurizer for limestone-gypsum wet desulphurization |
| CN113087002A (en) * | 2021-04-02 | 2021-07-09 | 沈阳东大东科干燥煅烧工程技术有限公司 | Method and system for preparing calcium oxide balls from carbide slag |
| CN114011834A (en) * | 2021-10-15 | 2022-02-08 | 江苏中圣园科技股份有限公司 | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system |
| CN114210192A (en) * | 2021-12-17 | 2022-03-22 | 安徽华塑股份有限公司 | Process for preparing high-efficiency desulfurizer and byproduct active calcium oxide by using carbide slag |
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| CN112426872A (en) * | 2020-11-30 | 2021-03-02 | 天津中材工程研究中心有限公司 | Method for improving purity of desulfurizer for limestone-gypsum wet desulphurization |
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| CN113087002A (en) * | 2021-04-02 | 2021-07-09 | 沈阳东大东科干燥煅烧工程技术有限公司 | Method and system for preparing calcium oxide balls from carbide slag |
| CN114011834A (en) * | 2021-10-15 | 2022-02-08 | 江苏中圣园科技股份有限公司 | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system |
| CN114210192A (en) * | 2021-12-17 | 2022-03-22 | 安徽华塑股份有限公司 | Process for preparing high-efficiency desulfurizer and byproduct active calcium oxide by using carbide slag |
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