- •Англійська мова
- •Lesson 1
- •1. Read and memorize the following words:
- •2. Read and memorize the following word combinations:
- •3. Read and translate the text into Ukrainian. Chemical engineering and chemistry
- •4. Answer the questions to the text:
- •6. Match the words from the text to their synonyms:
- •7. Translate the following sentences paying attention to the Objective and Subjective Infinitive Constructions:
- •8. Pick up the key words from the text “Chemical engineering and chemistry”. Make up your own sentences with them.
- •3. Read and translate the text into Ukrainian. Unit operations in chemical engineering
- •4. Answer the questions to the text:
- •5. Form derivatives from the following words and translate them into Ukrainian:
- •6. Fill in the gaps using the terms denoting unit operations from the table below:
- •7. Match the columns to make up word combinations and translate them into Ukrainian:
- •8. Translate into English using a technical dictionary:
- •9. Pick up the key words from the text “Unit operations in chemical engineering”. Make up your own sentences with them.
- •2. Read and memorize the following word combinations:
- •3. Read and translate the text into Ukrainian:
- •Industrial dryers
- •4. Answer the questions to the text:
- •6. Match the words from the text with their synonyms on the right:
- •7. Point out the sentences containing information directly from the text:
- •8. Point out the word combinations with Participial constructions. Define the type of the Participle.
- •3. Read and translate the text into Ukrainian. Filtration and filters
- •3. Answer the questions to the text:
- •5. Fill in the gaps with the words from the text and translate them into Ukrainian:
- •6. Change the following sentences according to the model.
- •2. Read and memorize the following word combinations
- •3. Read and translate the text into Ukrainian. Centrifuges
- •4. Answer the questions to the text:
- •5. Change the following sentences according to the model:
- •6. Translate into Ukrainian paying attention to the word “since”:
- •7. Say if the following statements are true or false. If the statement is false
- •8. Choose the correct continuation to complete the following statements:
- •2. Read and memorize the following word combinations
- •3. Read and translate the text into Ukrainian. Mixing and blending
- •4. Answer the questions to the text:
- •5. Fill in the gaps with the words from the text and translate these word combinations into Ukrainian:
- •6. Choose the correct grammar form for each sentence:
- •6. Say if the following statements are true or false. If the statement is false explain why:
- •3. Read and translate the text into Ukrainian: Heat exchangers
- •4. Answer the questions to the text:
- •5. Choose the correct continuation to complete the following statements:
- •6. Fill in the gaps with the suitable words from the box:
- •7. Which of the following sentences from the text contain the Passive Voice forms? Explain how you define these forms.
- •6. Say if the following statements are true or false. If the statement is false explain why:
- •3. Read and translate the text into Ukrainian: Crushers
- •4. Answer the questions to the text:
- •5. Match the words to make up possible word combinations:
- •6. Try to put these words in the right order and make a sentence:
- •7. Say if the statement is true or false. If the statement is false give the correct answer:
- •8. Read the following text. Retell it to a partner:
- •9. Open the brackets choosing the correct form of the Participles. Translate the sentences into Ukrainian:
- •10. Use the following sentences in all the forms and tenses adding suitable adverbial modifiers where necessary:
- •2. Read and memorize the following word combinations:
- •3. Read and translate the text into Ukrainian. Grinders
- •4. Answer the questions to the text:
- •5. Say if the following statements are true or false. If the statement is false
- •6. Сhoose the correct item to complete the following statements:
- •5. Match the words to make up possible word combinations and translate them into Ukrainian:
- •6. Fill in the gaps using a suitable word from the table:
- •7. Find out the sentences containing gerundial constructions and define the function of Gerund:
- •8. Make a brief engineering report explaining the difference between a ball mill and an impact crusher. Mention the design, the principle of work and materials to be processed.
- •Reading strategies
- •Writing abstracts
- •Особливості перекладу науково-технічного тексту
3. Read and translate the text into Ukrainian. Mixing and blending
Mixing is the process of thoroughly combining different materials to produce a homogenous product. The mixture is generally a combination of dissimilar materials, e.g. coal ash and cement are blended in a specified ratio to produce Pozzocrete cement. In other cases, a chemically homogenous material may be mixed to produce a uniform lot of a desired weight/volume with consistent particle size distribution, color, texture, and other required attributes, e.g. metal powders produced in 1 ton batch size are blended to a homogenous lot size of 4 tons (or pre-specified quantity).
The terms "mixing" and "blending" are often used interchangeably, but technically they are slightly different. Blending is a process of combining materials, but blending is a relatively gentle process compared to mixing. In terms of the phase of material, blending is the process of solid-solid mixing or mixing of bulk solids with small quantity of liquid. The terminology mixing is more closely associated with liquid-liquid, gas-liquid, and viscous materials.
Mixing and blending are the most demanding unit operations in the chemical process industries (mixing and blending of specialty chemicals, explosives, fertilizers, dry powdered detergents, glass or ceramics, and rubber compounds). Pharmaceutical and food industries also rely heavily on mixing and blending technology (blending of active ingredients of a drug with excipients like starch, cellulose, or lactose; preparation of cake mix, spices, and flavours)
The wide variety and ever increasing complexity of mixing processes encountered in industrial applications requires careful selection, design, and scale up to ensure effective and efficient mixing. Improved mixing efficiency leads to shorter batch cycle times and operational costs. Today's competitive production lines necessitate robust equipment that are capable of fast blend times, lower power consumption, equipment flexibility, ease of cleaning, and a gamut of customized features. In addition to blending components, many modern mixers are designed to combine different process steps in a single equipment, e.g. coating, granulation, heat transfer, drying, etc.
At the numerous enterprises of chemical, food, pharmaceutical and other industries, the equipment with machine mixing devices is practised on a large scale in processes requiring dissolution, leaching, emulsification, formation of suspension as well as homogeneous and heterogeneous systems mixing. Industrial mixers are machines that blend, homogenize, emulsify or otherwise mix components into a homogenous substance.
Industrial mixers are used to thoroughly combine any type of liquid or solid during the manufacturing process. They are usually large tanks or vats with motorized blades or paddles that rotate on a stationary shaft or remain stationary themselves. Depending on the application, some models may have sharp blades while other may have large flat paddles. The attachments or heads are generally removable to maximize the mixer's effectiveness with different materials. Stainless steel is most commonly used, especially within the food and beverage industry because of the metal's sanitary and hygienic properties.
Other possible materials include aluminum, steel or cast iron. Industrial mixers are widely used across many industries including the cosmetic, pharmaceutical, chemical, agricultural, pulp and paper, automotive, water treatment, adhesive and sealant industries. These mixers are equipped to handle glue, petroleum products, cement, biodiesel, dry and wet chemicals, medicines, toothpaste, food colouring, syrups, medical ointment, lotions, creams, vitamins, shampoos, detergents, hair dye, petroleum products, silicone, adhesives, polyurethane and many other products or ingredients.
Within the single category of industrial mixers, there are many kinds and varieties of these machines that have been specialized. Blenders are very similar if not identical to mixers; some prefer to differentiate between the two because blenders sometimes have sharper blades that move at faster speeds. In terms of processing speed and style, there are two modes. Batch mixers are the more common of the two kinds. Mixing begins after a substance is poured into the industrial mixer. Once mixing is complete, the substance is poured out of the mixer for further processing and the mixer is then cleaned before being refilled. Continuous-feed mixers can handle a steady flow of material. Static mixers are inline and continuous feed mixers because they do not move. The materials are mixed as they flow around the strategically-placed blades and paddles.
Another kind of industrial mixer is a drum mixer which consists of a rotating drum on the frame. There are multiple mixers used to accomplish a solution or substance that is the same throughout. High shear mixers offer shorter mixing times than standard mixers. The speed of the product at the tip of the rotor is higher than the speed at the centre which emulsifies immiscible materials. Similarly, homogenizers and emulsifiers achieve the same results by forcing substances to pass through a screen. Also known as mixers, agitators are the only machines that can blend chemicals, foods and other low-viscosity materials with ease. Because they have relatively small blades, they're also best used for slow, low-shear mixing processes where it's more important to keep the mixture moving than it is to actually blend its ingredients.