【正文】 important effect upon the choice of the primary crusher and storage systems. The moisture content has even greater implications when considering the raw milling system to be proposed in conjunction with the optimum temperature of preheater exit gas. A balance has to be struck between the requirements of the kiln system, the number of cyclone stages that can be used, and the heat requirements of the raw mill for raw materials drying. The level of undesirable chemical elements in the raw materials, such as potassium, sodium, magnesia, chlorides and sulfur requires careful consideration in the selection of the type of kiln system. The varying levels of impurity elements in conjunction with the sulfur in the raw material and possible additional sulfur intake from the kiln fuel, lead to the necessary decisions to be made relating to the acceptance and sizing of a bypass system. The mineralogy can vary greatly among raw materials in different countries. The method of deposition and the occurrence of the chemical elements in each of the raw materials can have a marked effect on the characteristics of bination in the kiln burning process. Notably this leads to variations in kiln fuel conditions. Predictions upon how the rawmaterials will behave when bined in the necessary proportions to obtain a mercial cement, are based upon laboratory burning and grinding tests conducted as part of the feasibility study. Energy and fuel usage are two key matters high on the agenda of all potential and existing cement plant operators. The cement industry has always been very conscious of making the maximum use of heat energy, and to this end heat transfer from the kiln gases to the raw materials, of from the hot clinker to the bustion air, has always been utilized. Today more than ever the efficient use of energy and fuel is sought affair and a range of plant and equipments available for consideration. Technical economy of scale is also an important factor and where the market justify large capacity plant, correspond with reductions in the cost of products are achieved. Energy consumption is be reduced through the use of rollmilling systems for raw meal in plant of tube mills, high efficiency separators in both the raw milling and cement milling departments, low pressure drop cyclones in the preheater of the burning process, and by the preheater of high pressure grinding rolls, and recent introduction of the horizontal roller mill, the socalled Horomill. The selection of the optimum planning processes ensures that the KWh/h electrical power consumption minimised. Fuel consumption is reduced the introduction of efficient cyclones construction with heat resistant tubes and an increase in the number of stages of preheater to mount maximum use of the hot gases leaving from the kiln. Fuel consumption is also siderable affected by the designation ancillary plant such as the kiln separators, gas ducting, kiln burner, flow control valves and instrumentation. Another recent development is the transfer of all the hot exhausted gases form the clinker cooler back onto the raw mill, thus saving on the heat required for drying the raw material. This arrangement also has the acute advantage of reducing the capital of the plant by the elimination of a cipitator or other clinker cooler collection system and its associating equipment.12。所以人們廣泛地接受了這些。明顯地，礦物研究將使窯內(nèi)燃料的損耗和回轉(zhuǎn)窯的煅燒環(huán)境有很多變化，當(dāng)為了獲得較經(jīng)濟(jì)的水泥從而對(duì)一定比例的化學(xué)成分進(jìn)行化合時(shí)，必須要預(yù)料生料將怎樣的反應(yīng)。當(dāng)考慮到生料磨系統(tǒng)預(yù)熱裝置所排出廢氣的最佳溫度時(shí)，濕度起到很大的作用。 環(huán)境保護(hù)要求。過(guò)程工藝設(shè)計(jì) 對(duì)于特定的工廠，最佳的工藝路線是依靠包括生料礦藏的物理和化學(xué)性質(zhì)的許多方面來(lái)設(shè)計(jì)的。這些原料需要進(jìn)行類(lèi)似于石灰石的記錄和化學(xué)分析。地質(zhì)專(zhuān)家能調(diào)整礦區(qū)調(diào)查工作和最大化地收集發(fā)現(xiàn)的有用信息。原材料的考證對(duì)于生料礦藏的儲(chǔ)量和質(zhì)量，我們必須對(duì)它們有很準(zhǔn)確的認(rèn)知。它也許是在決定市場(chǎng)研究的各方面問(wèn)題中的唯一并且是最重要的難題。如不考慮那些客觀意見(jiàn)和不認(rèn)清水泥使用者對(duì)不同型號(hào)的水泥需求的變化，這樣的預(yù)測(cè)是錯(cuò)誤的。公開(kāi)數(shù)據(jù)是研究者和專(zhuān)家對(duì)已知的客觀趨向進(jìn)行分析和對(duì)未知的新信息進(jìn)行推敲和比較所得出的。完整可行性研究市場(chǎng)調(diào)查市場(chǎng)研究的主觀目的是滿足在一定區(qū)域背景和工廠計(jì)劃的市場(chǎng)范圍內(nèi)對(duì)各種水泥的需要。預(yù)先可行性研究是在以很低費(fèi)用支出的條件下完成的?；Q性分析。新型水泥生產(chǎn)工藝的可行性研究要求英國(guó)WS , D Frame . Asim討論大型水泥設(shè)備工程的理論可行性。工程及工藝的概念設(shè)計(jì)。