CN1342620A - Process for preparing cement - Google Patents
Process for preparing cement Download PDFInfo
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- CN1342620A CN1342620A CN 00111364 CN00111364A CN1342620A CN 1342620 A CN1342620 A CN 1342620A CN 00111364 CN00111364 CN 00111364 CN 00111364 A CN00111364 A CN 00111364A CN 1342620 A CN1342620 A CN 1342620A
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- preparing cement
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Abstract
A process for preparing cement includes such steps as grinding clinker, proportionally mixing it with other raw materials, and homogenizing. Its advantages include no need of crushing, grinding and calcining, raising utilization rate of waste industrial dregs, no environmental pollution, low cost, and high quality of product.
Description
The invention belongs to the cement field, relate to a kind of method for production of cement.
Traditional method for production of cement is that raw material that mining is gone out is through fragmentation or oven dry, raw meal proportioning, grinding, calcining, grog batching, grinding is made finished cement again.Utilize this method to produce cement in the factory in city, need the various raw materials of exploiting out are transported in the factory in city,, amount many because of raw material variety causes traffic congestion greatly.Not only Production Flow Chart is long, floor space is many for this method, and main be because the exhaust emission urban environment of noise, dust and waste gas SO2 that operation required equipment such as fragmentation, grinding, calcining such as crusher, pulverizer, calcining kiln etc. cause, contaminated solution is the outstanding problem of city factory.Some city factory has stopped the preceding serial operation of grog batching now, directly adopts outsourcing grog and mixing material to prepare burden, and makes finished cement through grinding.But noise, dust that grog batching back powder-grinding process system is caused still can not thoroughly solve.
The purpose of this invention is to provide a kind of method for production of cement, to overcome above-mentioned shortcoming.
The object of the present invention is achieved like this: the feature of this method for production of cement is that the grog and the mixing material of grinding are respectively prepared burden, and makes finished product through homogenizing.Directly adopt the method for preparing burden behind the first grinding, changed after original grog batching the mode of grinding again.This method can make city factory cancellation powder-grinding process, according to finished product required performance and purposes, bears outside the city the source mill of powder-grinding process and selects respectively to specify the grog and the mixing material of fineness to prepare.Homogenizing can adopt various homogenization devices, with the admixtion uniform mixing.
Advantage of the present invention is:
(1) the present invention has thoroughly removed " fragmentation ", " grinding " and the source of pollution that are difficult to effect a radical cure that operation caused such as " calcinings ".Take up an area of less, invest low, instant effect, be applicable to the city, be particularly useful for the city plant produced higher environmental requirement.
(2) cement quality index of the present invention has all reached request of national standard.See Table 1.Because grog and mixing material are grindings respectively, so the grade of its finished cement subparticle distributes more rationally than traditional method, also makes hydrated cementitious more abundant, helps improving weather resistance, impermeabilisation and the performance such as anticorrosive of cement products.
(3) the present invention can improve the utilization ratio of industrial residue.Produce same roughly the same label cement, the present invention compares with traditional method, and during batching, the incorporation of industrial residue is big, particularly the incorporation of flyash.Not only the finished cement performance is constant, and can also reduce the consumption of grog, reduces cost.See Table 2.
(4) technology of the present invention is simple, and operation and control are convenient, and the range of product adjustment is fast and flexible.The cement of production all kinds at any time and label as required.
Below in conjunction with the accompanying drawing embodiment that develops simultaneously the present invention is described in further detail.
Fig. 1 is an embodiment of the invention Production Flow Chart synoptic diagram.
Mixing material is by forming slag (containing 5% gypsum) 2 and flyash 3.The material fineness tails over 4900 hole sizers, and % represents.As seen from Figure 1, with the fineness of grinding is that 1% grog 1, fineness are that 4% slag 2 and fineness are that 3% flyash 3 is transported, send into respectively in each raw material storage tank 4,5,6, by measuring apparatus 7,8,9 with grog 1, slag 2 and flyash 3 (%) ratio of 48: 22: 30 batching successively by weight percentage, admixtion is sent in the homogenization device 10, after the homogenizing fineness be 2.4% 425
#R composite Portland cement finished product 11, it is qualified to measure its stability, and 3 days folding strengths are that 4.5Mpa, ultimate compression strength are 25.4Mpa, and 28 days folding strengths are that 8.6Mpa, ultimate compression strength are 50.2Mpa, and the presetting period is 170 minutes, final setting time is 250 minutes.Finished product 11 is sent in the finished product jar 12, be packaged into the bag warehouse-in or load in bulk through packing jars 13 and dispatch from the factory through bulk pot 14.
Table 1 425#R Portland cement performance detection data
| Test event | Fineness (%) | Normal consistency (%) | Setting time (minute) | Stability is boiled and is boiled | Intensity (Mpa) | Chemical analysis (%) | ||||||
| Initial set | Final set | Anti-folding | Resistance to compression | Sulfur trioxide | Loss on | Magnesia | ||||||
| 3 days | 28 | 3 days | 28 days | |||||||||
| National standard | ≤ 10 | ≥ 45 | ≤ 600 | Qualified | ≥ 4.0 | ≥ 6.5 | ≥ 21.0 | ≥ 42.5 | ≤ 3.5 | ≤ 5.0 | ≤ 5.0 | |
| Detect data | 2.4 | 27.4 | 175 | 230 | Qualified | 4.7 | 8.0 | 27.1 | 50.1 | 2.3 | 3.3 | 1.9 |
Table 2 425#R composite Portland cement performance test comparison sheet
| Method | Batching (%) | Rupture strength (Mpa) | Compression strength (Mpa) | Setting time (minute) | Stability is boiled and is boiled | Cost of material yuan/ton | Conclusion | |||
| Grog: slag (containing 5% gypsum): | 3 days | 28 | 3 days | 28 days | Initial set | Final set | ||||
| The present invention | 50∶20∶30 | 4.6 | 8.5 | 26.5 | 52.0 | 220 | 290 | Qualified | 183 | Quality is good, and potentiality are big |
| Conventional method | 50∶20∶30 | 3.8 | 6.2 | 18.3 | 39.2 | 270 | 345 | Qualified | 183 | 28 days indexs of compression strength are defective |
| Conventional method | 60∶30∶10 | 4.5 | 8.1 | 23.9 | 47.8 | 200 | 295 | Qualified | 219 | Qualified, the cost of material height, potentiality are little |
Claims (1)
1. method for production of cement is characterized in that the grog and the mixing material of grinding are respectively prepared burden, and makes finished product through homogenizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111364 CN1342620A (en) | 2000-09-11 | 2000-09-11 | Process for preparing cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111364 CN1342620A (en) | 2000-09-11 | 2000-09-11 | Process for preparing cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1342620A true CN1342620A (en) | 2002-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00111364 Pending CN1342620A (en) | 2000-09-11 | 2000-09-11 | Process for preparing cement |
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| CN (1) | CN1342620A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036637A (en) * | 2015-07-08 | 2015-11-11 | 宁夏盛远新型建材有限责任公司 | Preparation process and device for compound mineral admixture |
| CN109809744A (en) * | 2019-03-07 | 2019-05-28 | 邝文辉 | Glue, mixed, the integrated concrete for making method of concrete |
| CN109956689A (en) * | 2019-04-24 | 2019-07-02 | 邝文辉 | Glue, the concrete integrated manufacture method of concrete |
-
2000
- 2000-09-11 CN CN 00111364 patent/CN1342620A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036637A (en) * | 2015-07-08 | 2015-11-11 | 宁夏盛远新型建材有限责任公司 | Preparation process and device for compound mineral admixture |
| CN109809744A (en) * | 2019-03-07 | 2019-05-28 | 邝文辉 | Glue, mixed, the integrated concrete for making method of concrete |
| CN109956689A (en) * | 2019-04-24 | 2019-07-02 | 邝文辉 | Glue, the concrete integrated manufacture method of concrete |
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